diff options
Diffstat (limited to 'lib/tqwtplot3d/3rdparty/gl2ps/gl2ps.c')
| -rw-r--r-- | lib/tqwtplot3d/3rdparty/gl2ps/gl2ps.c | 5986 |
1 files changed, 5986 insertions, 0 deletions
diff --git a/lib/tqwtplot3d/3rdparty/gl2ps/gl2ps.c b/lib/tqwtplot3d/3rdparty/gl2ps/gl2ps.c new file mode 100644 index 0000000..46d2a15 --- /dev/null +++ b/lib/tqwtplot3d/3rdparty/gl2ps/gl2ps.c @@ -0,0 +1,5986 @@ +/* $Id: gl2ps.c 173 2007-05-20 15:51:51Z krischnamurti $ */
+/*
+ * GL2PS, an OpenGL to PostScript Printing Library
+ * Copyright (C) 1999-2006 Christophe Geuzaine <geuz@geuz.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of either:
+ *
+ * a) the GNU Library General Public License as published by the Free
+ * Software Foundation, either version 2 of the License, or (at your
+ * option) any later version; or
+ *
+ * b) the GL2PS License as published by Christophe Geuzaine, either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See either
+ * the GNU Library General Public License or the GL2PS License for
+ * more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library in the file named "COPYING.LGPL";
+ * if not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+ * Cambridge, MA 02139, USA.
+ *
+ * You should have received a copy of the GL2PS License with this
+ * library in the file named "COPYING.GL2PS"; if not, I will be glad
+ * to provide one.
+ *
+ * Contributors:
+ * Michael Sweet <mike@easysw.com>
+ * Marc Ume <marc.ume@digitalgraphics.be>
+ * Jean-Francois Remacle <remacle@gce.ucl.ac.be>
+ * Bart Kaptein <B.L.Kaptein@lumc.nl>
+ * Quy Nguyen-Dai <quy@nguyendai.org>
+ * Sam Buss <sbuss@ucsd.edu>
+ * Shane Hill <Shane.Hill@dsto.defence.gov.au>
+ * Romain Boman <r_boman@yahoo.fr>
+ * Rouben Rostamian <rostamian@umbc.edu>
+ * Diego Santa Cruz <Diego.SantaCruz@epfl.ch>
+ * Shahzad Muzaffar <Shahzad.Muzaffar@cern.ch>
+ * Lassi Tuura <lassi.tuura@cern.ch>
+ * Guy Barrand <barrand@lal.in2p3.fr>
+ * Prabhu Ramachandran <prabhu@aero.iitm.ernet.in>
+ * Micha Bieber <bieber@traits.de>
+ * Olivier Couet <couet@mail.cern.ch>
+ * Shai Ayal <shaiay@gmail.com>
+ * Fabian Wenzel <wenzel@tu-harburg.de>
+ * Ian D. Gay <gay@sfu.ca>
+ * Cosmin Truta <cosmin@cs.toronto.edu>
+ * Baiju Devani <b.devani@gmail.com>
+ * Alexander Danilov <danilov@lanl.gov>
+ *
+ * For the latest info about gl2ps, see http://www.geuz.org/gl2ps/.
+ * Please report all bugs and problems to <gl2ps@geuz.org>.
+ */
+
+#include "gl2ps.h"
+
+#include <math.h>
+#include <string.h>
+#include <sys/types.h>
+#include <stdarg.h>
+#include <time.h>
+#include <float.h>
+
+#if defined(GL2PS_HAVE_ZLIB)
+#include <zlib.h>
+#endif
+
+#if defined(GL2PS_HAVE_LIBPNG)
+#include <png.h>
+#endif
+
+/*********************************************************************
+ *
+ * Private definitions, data structures and prototypes
+ *
+ *********************************************************************/
+
+/* Magic numbers (assuming that the order of magnitude of window
+ coordinates is 10^3) */
+
+#define GL2PS_EPSILON 5.0e-3F
+#define GL2PS_ZSCALE 1000.0F
+#define GL2PS_ZOFFSET 5.0e-2F
+#define GL2PS_ZOFFSET_LARGE 20.0F
+#define GL2PS_ZERO(arg) (fabs(arg) < 1.e-20)
+
+/* Primitive types */
+
+#define GL2PS_NO_TYPE -1
+#define GL2PS_TEXT 1
+#define GL2PS_POINT 2
+#define GL2PS_LINE 3
+#define GL2PS_QUADRANGLE 4
+#define GL2PS_TRIANGLE 5
+#define GL2PS_PIXMAP 6
+#define GL2PS_IMAGEMAP 7
+#define GL2PS_IMAGEMAP_WRITTEN 8
+#define GL2PS_IMAGEMAP_VISIBLE 9
+#define GL2PS_SPECIAL 10
+
+/* BSP tree primitive comparison */
+
+#define GL2PS_COINCIDENT 1
+#define GL2PS_IN_FRONT_OF 2
+#define GL2PS_IN_BACK_OF 3
+#define GL2PS_SPANNING 4
+
+/* 2D BSP tree primitive comparison */
+
+#define GL2PS_POINT_COINCIDENT 0
+#define GL2PS_POINT_INFRONT 1
+#define GL2PS_POINT_BACK 2
+
+/* Internal feedback buffer pass-through tokens */
+
+#define GL2PS_BEGIN_OFFSET_TOKEN 1
+#define GL2PS_END_OFFSET_TOKEN 2
+#define GL2PS_BEGIN_BOUNDARY_TOKEN 3
+#define GL2PS_END_BOUNDARY_TOKEN 4
+#define GL2PS_BEGIN_STIPPLE_TOKEN 5
+#define GL2PS_END_STIPPLE_TOKEN 6
+#define GL2PS_POINT_SIZE_TOKEN 7
+#define GL2PS_LINE_WIDTH_TOKEN 8
+#define GL2PS_BEGIN_BLEND_TOKEN 9
+#define GL2PS_END_BLEND_TOKEN 10
+#define GL2PS_SRC_BLEND_TOKEN 11
+#define GL2PS_DST_BLEND_TOKEN 12
+#define GL2PS_IMAGEMAP_TOKEN 13
+#define GL2PS_DRAW_PIXELS_TOKEN 14
+#define GL2PS_TEXT_TOKEN 15
+
+typedef enum {
+ T_UNDEFINED = -1,
+ T_CONST_COLOR = 1,
+ T_VAR_COLOR = 1<<1,
+ T_ALPHA_1 = 1<<2,
+ T_ALPHA_LESS_1 = 1<<3,
+ T_VAR_ALPHA = 1<<4
+} GL2PS_TRIANGLE_PROPERTY;
+
+typedef GLfloat GL2PSxyz[3];
+typedef GLfloat GL2PSplane[4];
+
+typedef struct _GL2PSbsptree2d GL2PSbsptree2d;
+
+struct _GL2PSbsptree2d {
+ GL2PSplane plane;
+ GL2PSbsptree2d *front, *back;
+};
+
+typedef struct {
+ GLint nmax, size, incr, n;
+ char *array;
+} GL2PSlist;
+
+typedef struct _GL2PSbsptree GL2PSbsptree;
+
+struct _GL2PSbsptree {
+ GL2PSplane plane;
+ GL2PSlist *primitives;
+ GL2PSbsptree *front, *back;
+};
+
+typedef struct {
+ GL2PSxyz xyz;
+ GL2PSrgba rgba;
+} GL2PSvertex;
+
+typedef struct {
+ GL2PSvertex vertex[3];
+ int prop;
+} GL2PStriangle;
+
+typedef struct {
+ GLshort fontsize;
+ char *str, *fontname;
+ /* Note: for a 'special' string, 'alignment' holds the format
+ (PostScript, PDF, etc.) of the special string */
+ GLint alignment;
+ GLfloat angle;
+} GL2PSstring;
+
+typedef struct {
+ GLsizei width, height;
+ /* Note: for an imagemap, 'type' indicates if it has already been
+ written to the file or not, and 'format' indicates if it is
+ visible or not */
+ GLenum format, type;
+ GLfloat *pixels;
+} GL2PSimage;
+
+typedef struct _GL2PSimagemap GL2PSimagemap;
+
+struct _GL2PSimagemap {
+ GL2PSimage *image;
+ GL2PSimagemap *next;
+};
+
+typedef struct {
+ GLshort type, numverts;
+ GLushort pattern;
+ char boundary, offset, culled;
+ GLint factor;
+ GLfloat width;
+ GL2PSvertex *verts;
+ union {
+ GL2PSstring *text;
+ GL2PSimage *image;
+ } data;
+} GL2PSprimitive;
+
+typedef struct {
+#if defined(GL2PS_HAVE_ZLIB)
+ Bytef *dest, *src, *start;
+ uLongf destLen, srcLen;
+#else
+ int dummy;
+#endif
+} GL2PScompress;
+
+typedef struct{
+ GL2PSlist* ptrlist;
+ int gsno, fontno, imno, shno, maskshno, trgroupno;
+ int gsobjno, fontobjno, imobjno, shobjno, maskshobjno, trgroupobjno;
+} GL2PSpdfgroup;
+
+typedef struct {
+ /* General */
+ GLint format, sort, options, colorsize, colormode, buffersize;
+ char *title, *producer, *filename;
+ GLboolean boundary, blending;
+ GLfloat *feedback, offset[2], lastlinewidth;
+ GLint viewport[4], blendfunc[2], lastfactor;
+ GL2PSrgba *colormap, lastrgba, threshold, bgcolor;
+ GLushort lastpattern;
+ GL2PSvertex lastvertex;
+ GL2PSlist *primitives, *auxprimitives;
+ FILE *stream;
+ GL2PScompress *compress;
+ GLboolean header;
+
+ /* BSP-specific */
+ GLint maxbestroot;
+
+ /* Occlusion culling-specific */
+ GLboolean zerosurfacearea;
+ GL2PSbsptree2d *imagetree;
+ GL2PSprimitive *primitivetoadd;
+
+ /* PDF-specific */
+ int streamlength;
+ GL2PSlist *pdfprimlist, *pdfgrouplist;
+ int *xreflist;
+ int objects_stack; /* available objects */
+ int extgs_stack; /* graphics state object number */
+ int font_stack; /* font object number */
+ int im_stack; /* image object number */
+ int trgroupobjects_stack; /* xobject numbers */
+ int shader_stack; /* shader object numbers */
+ int mshader_stack; /* mask shader object numbers */
+
+ /* for image map list */
+ GL2PSimagemap *imagemap_head;
+ GL2PSimagemap *imagemap_tail;
+} GL2PScontext;
+
+typedef struct {
+ void (*printHeader)(void);
+ void (*printFooter)(void);
+ void (*beginViewport)(GLint viewport[4]);
+ GLint (*endViewport)(void);
+ void (*printPrimitive)(void *data);
+ void (*printFinalPrimitive)(void);
+ const char *file_extension;
+ const char *description;
+} GL2PSbackend;
+
+/* The gl2ps context. gl2ps is not thread safe (we should create a
+ local GL2PScontext during gl2psBeginPage) */
+
+static GL2PScontext *gl2ps = NULL;
+
+/* Need to forward-declare this one */
+
+static GLint gl2psPrintPrimitives(void);
+
+/*********************************************************************
+ *
+ * Utility routines
+ *
+ *********************************************************************/
+
+static void gl2psMsg(GLint level, const char *fmt, ...)
+{
+ va_list args;
+
+ if(!(gl2ps->options & GL2PS_SILENT)){
+ switch(level){
+ case GL2PS_INFO : fprintf(stderr, "GL2PS info: "); break;
+ case GL2PS_WARNING : fprintf(stderr, "GL2PS warning: "); break;
+ case GL2PS_ERROR : fprintf(stderr, "GL2PS error: "); break;
+ }
+ va_start(args, fmt);
+ vfprintf(stderr, fmt, args);
+ va_end(args);
+ fprintf(stderr, "\n");
+ }
+ /* if(level == GL2PS_ERROR) exit(1); */
+}
+
+static void *gl2psMalloc(size_t size)
+{
+ void *ptr;
+
+ if(!size) return(NULL);
+ ptr = malloc(size);
+ if(!ptr){
+ gl2psMsg(GL2PS_ERROR, "Couldn't allocate requested memory");
+ exit(1);
+ }
+ return(ptr);
+}
+
+static void *gl2psRealloc(void *ptr, size_t size)
+{
+ if(!size) return(NULL);
+ ptr = realloc(ptr, size);
+ if(!ptr){
+ gl2psMsg(GL2PS_ERROR, "Couldn't reallocate requested memory");
+ exit(1);
+ }
+ return(ptr);
+}
+
+static void gl2psFree(void *ptr)
+{
+ if(!ptr) return;
+ free(ptr);
+}
+
+static size_t gl2psWriteBigEndian(unsigned long data, size_t bytes)
+{
+ size_t i;
+ size_t size = sizeof(unsigned long);
+ for(i = 1; i <= bytes; ++i){
+ fputc(0xff & (data >> (size-i) * 8), gl2ps->stream);
+ }
+ return bytes;
+}
+
+/* zlib compression helper routines */
+
+#if defined(GL2PS_HAVE_ZLIB)
+
+static void gl2psSetupCompress(void)
+{
+ gl2ps->compress = (GL2PScompress*)gl2psMalloc(sizeof(GL2PScompress));
+ gl2ps->compress->src = NULL;
+ gl2ps->compress->start = NULL;
+ gl2ps->compress->dest = NULL;
+ gl2ps->compress->srcLen = 0;
+ gl2ps->compress->destLen = 0;
+}
+
+static void gl2psFreeCompress(void)
+{
+ if(!gl2ps->compress)
+ return;
+ gl2psFree(gl2ps->compress->start);
+ gl2psFree(gl2ps->compress->dest);
+ gl2ps->compress->src = NULL;
+ gl2ps->compress->start = NULL;
+ gl2ps->compress->dest = NULL;
+ gl2ps->compress->srcLen = 0;
+ gl2ps->compress->destLen = 0;
+}
+
+static int gl2psAllocCompress(unsigned int srcsize)
+{
+ gl2psFreeCompress();
+
+ if(!gl2ps->compress || !srcsize)
+ return GL2PS_ERROR;
+
+ gl2ps->compress->srcLen = srcsize;
+ gl2ps->compress->destLen = (int)ceil(1.001 * gl2ps->compress->srcLen + 12);
+ gl2ps->compress->src = (Bytef*)gl2psMalloc(gl2ps->compress->srcLen);
+ gl2ps->compress->start = gl2ps->compress->src;
+ gl2ps->compress->dest = (Bytef*)gl2psMalloc(gl2ps->compress->destLen);
+
+ return GL2PS_SUCCESS;
+}
+
+static void *gl2psReallocCompress(unsigned int srcsize)
+{
+ if(!gl2ps->compress || !srcsize)
+ return NULL;
+
+ if(srcsize < gl2ps->compress->srcLen)
+ return gl2ps->compress->start;
+
+ gl2ps->compress->srcLen = srcsize;
+ gl2ps->compress->destLen = (int)ceil(1.001 * gl2ps->compress->srcLen + 12);
+ gl2ps->compress->src = (Bytef*)gl2psRealloc(gl2ps->compress->src,
+ gl2ps->compress->srcLen);
+ gl2ps->compress->start = gl2ps->compress->src;
+ gl2ps->compress->dest = (Bytef*)gl2psRealloc(gl2ps->compress->dest,
+ gl2ps->compress->destLen);
+
+ return gl2ps->compress->start;
+}
+
+static size_t gl2psWriteBigEndianCompress(unsigned long data, size_t bytes)
+{
+ size_t i;
+ size_t size = sizeof(unsigned long);
+ for(i = 1; i <= bytes; ++i){
+ *gl2ps->compress->src = (Bytef)(0xff & (data >> (size-i) * 8));
+ ++gl2ps->compress->src;
+ }
+ return bytes;
+}
+
+static int gl2psDeflate(void)
+{
+ /* For compatibility with older zlib versions, we use compress(...)
+ instead of compress2(..., Z_BEST_COMPRESSION) */
+ return compress(gl2ps->compress->dest, &gl2ps->compress->destLen,
+ gl2ps->compress->start, gl2ps->compress->srcLen);
+}
+
+#endif
+
+static int gl2psPrintf(const char* fmt, ...)
+{
+ int ret;
+ va_list args;
+
+#if defined(GL2PS_HAVE_ZLIB)
+ unsigned int oldsize = 0;
+ static char buf[1000];
+ if(gl2ps->options & GL2PS_COMPRESS){
+ va_start(args, fmt);
+ ret = vsprintf(buf, fmt, args);
+ va_end(args);
+ oldsize = gl2ps->compress->srcLen;
+ gl2ps->compress->start = (Bytef*)gl2psReallocCompress(oldsize + ret);
+ memcpy(gl2ps->compress->start+oldsize, buf, ret);
+ ret = 0;
+ }
+ else{
+#endif
+ va_start(args, fmt);
+ ret = vfprintf(gl2ps->stream, fmt, args);
+ va_end(args);
+#if defined(GL2PS_HAVE_ZLIB)
+ }
+#endif
+ return ret;
+}
+
+static void gl2psPrintGzipHeader()
+{
+#if defined(GL2PS_HAVE_ZLIB)
+ char tmp[10] = {'\x1f', '\x8b', /* magic numbers: 0x1f, 0x8b */
+ 8, /* compression method: Z_DEFLATED */
+ 0, /* flags */
+ 0, 0, 0, 0, /* time */
+ 2, /* extra flags: max compression */
+ '\x03'}; /* OS code: 0x03 (Unix) */
+
+ if(gl2ps->options & GL2PS_COMPRESS){
+ gl2psSetupCompress();
+ /* add the gzip file header */
+ fwrite(tmp, 10, 1, gl2ps->stream);
+ }
+#endif
+}
+
+static void gl2psPrintGzipFooter()
+{
+#if defined(GL2PS_HAVE_ZLIB)
+ int n;
+ uLong crc, len;
+ char tmp[8];
+
+ if(gl2ps->options & GL2PS_COMPRESS){
+ if(Z_OK != gl2psDeflate()){
+ gl2psMsg(GL2PS_ERROR, "Zlib deflate error");
+ }
+ else{
+ /* determine the length of the header in the zlib stream */
+ n = 2; /* CMF+FLG */
+ if(gl2ps->compress->dest[1] & (1<<5)){
+ n += 4; /* DICTID */
+ }
+ /* write the data, without the zlib header and footer */
+ fwrite(gl2ps->compress->dest+n, gl2ps->compress->destLen-(n+4),
+ 1, gl2ps->stream);
+ /* add the gzip file footer */
+ crc = crc32(0L, gl2ps->compress->start, gl2ps->compress->srcLen);
+ for(n = 0; n < 4; ++n){
+ tmp[n] = (char)(crc & 0xff);
+ crc >>= 8;
+ }
+ len = gl2ps->compress->srcLen;
+ for(n = 4; n < 8; ++n){
+ tmp[n] = (char)(len & 0xff);
+ len >>= 8;
+ }
+ fwrite(tmp, 8, 1, gl2ps->stream);
+ }
+ gl2psFreeCompress();
+ gl2psFree(gl2ps->compress);
+ gl2ps->compress = NULL;
+ }
+#endif
+}
+
+/* The list handling routines */
+
+static void gl2psListRealloc(GL2PSlist *list, GLint n)
+{
+ if(!list){
+ gl2psMsg(GL2PS_ERROR, "Cannot reallocate NULL list");
+ return;
+ }
+ if(n <= 0) return;
+ if(!list->array){
+ list->nmax = n;
+ list->array = (char*)gl2psMalloc(list->nmax * list->size);
+ }
+ else{
+ if(n > list->nmax){
+ list->nmax = ((n - 1) / list->incr + 1) * list->incr;
+ list->array = (char*)gl2psRealloc(list->array,
+ list->nmax * list->size);
+ }
+ }
+}
+
+static GL2PSlist *gl2psListCreate(GLint n, GLint incr, GLint size)
+{
+ GL2PSlist *list;
+
+ if(n < 0) n = 0;
+ if(incr <= 0) incr = 1;
+ list = (GL2PSlist*)gl2psMalloc(sizeof(GL2PSlist));
+ list->nmax = 0;
+ list->incr = incr;
+ list->size = size;
+ list->n = 0;
+ list->array = NULL;
+ gl2psListRealloc(list, n);
+ return(list);
+}
+
+static void gl2psListReset(GL2PSlist *list)
+{
+ if(!list) return;
+ list->n = 0;
+}
+
+static void gl2psListDelete(GL2PSlist *list)
+{
+ if(!list) return;
+ gl2psFree(list->array);
+ gl2psFree(list);
+}
+
+static void gl2psListAdd(GL2PSlist *list, void *data)
+{
+ if(!list){
+ gl2psMsg(GL2PS_ERROR, "Cannot add into unallocated list");
+ return;
+ }
+ list->n++;
+ gl2psListRealloc(list, list->n);
+ memcpy(&list->array[(list->n - 1) * list->size], data, list->size);
+}
+
+static int gl2psListNbr(GL2PSlist *list)
+{
+ if(!list)
+ return 0;
+ return(list->n);
+}
+
+static void *gl2psListPointer(GL2PSlist *list, GLint index)
+{
+ if(!list){
+ gl2psMsg(GL2PS_ERROR, "Cannot point into unallocated list");
+ return NULL;
+ }
+ if((index < 0) || (index >= list->n)){
+ gl2psMsg(GL2PS_ERROR, "Wrong list index in gl2psListPointer");
+ return NULL;
+ }
+ return(&list->array[index * list->size]);
+}
+
+static void gl2psListSort(GL2PSlist *list,
+ int (*fcmp)(const void *a, const void *b))
+{
+ if(!list)
+ return;
+ qsort(list->array, list->n, list->size, fcmp);
+}
+
+static void gl2psListAction(GL2PSlist *list, void (*action)(void *data))
+{
+ GLint i;
+
+ for(i = 0; i < gl2psListNbr(list); i++){
+ (*action)(gl2psListPointer(list, i));
+ }
+}
+
+static void gl2psListActionInverse(GL2PSlist *list, void (*action)(void *data))
+{
+ GLint i;
+
+ for(i = gl2psListNbr(list); i > 0; i--){
+ (*action)(gl2psListPointer(list, i-1));
+ }
+}
+
+#if defined(GL2PS_HAVE_LIBPNG)
+
+static void gl2psListRead(GL2PSlist *list, int index, void *data)
+{
+ if((index < 0) || (index >= list->n))
+ gl2psMsg(GL2PS_ERROR, "Wrong list index in gl2psListRead");
+ memcpy(data, &list->array[index * list->size], list->size);
+}
+
+static void gl2psEncodeBase64Block(unsigned char in[3], unsigned char out[4], int len)
+{
+ static const char cb64[] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+ out[0] = cb64[ in[0] >> 2 ];
+ out[1] = cb64[ ((in[0] & 0x03) << 4) | ((in[1] & 0xf0) >> 4) ];
+ out[2] = (len > 1) ? cb64[ ((in[1] & 0x0f) << 2) | ((in[2] & 0xc0) >> 6) ] : '=';
+ out[3] = (len > 2) ? cb64[ in[2] & 0x3f ] : '=';
+}
+
+static void gl2psListEncodeBase64(GL2PSlist *list)
+{
+ unsigned char *buffer, in[3], out[4];
+ int i, n, index, len;
+
+ n = list->n * list->size;
+ buffer = (unsigned char*)gl2psMalloc(n * sizeof(unsigned char));
+ memcpy(buffer, list->array, n * sizeof(unsigned char));
+ gl2psListReset(list);
+
+ index = 0;
+ while(index < n) {
+ len = 0;
+ for(i = 0; i < 3; i++) {
+ if(index < n){
+ in[i] = buffer[index];
+ len++;
+ }
+ else{
+ in[i] = 0;
+ }
+ index++;
+ }
+ if(len) {
+ gl2psEncodeBase64Block(in, out, len);
+ for(i = 0; i < 4; i++)
+ gl2psListAdd(list, &out[i]);
+ }
+ }
+ gl2psFree(buffer);
+}
+
+#endif
+
+/* Helpers for rgba colors */
+
+static GLboolean gl2psSameColor(GL2PSrgba rgba1, GL2PSrgba rgba2)
+{
+ if(!GL2PS_ZERO(rgba1[0] - rgba2[0]) ||
+ !GL2PS_ZERO(rgba1[1] - rgba2[1]) ||
+ !GL2PS_ZERO(rgba1[2] - rgba2[2]))
+ return GL_FALSE;
+ return GL_TRUE;
+}
+
+static GLboolean gl2psVertsSameColor(const GL2PSprimitive *prim)
+{
+ int i;
+
+ for(i = 1; i < prim->numverts; i++){
+ if(!gl2psSameColor(prim->verts[0].rgba, prim->verts[i].rgba)){
+ return GL_FALSE;
+ }
+ }
+ return GL_TRUE;
+}
+
+static GLboolean gl2psSameColorThreshold(int n, GL2PSrgba rgba[],
+ GL2PSrgba threshold)
+{
+ int i;
+
+ if(n < 2) return GL_TRUE;
+
+ for(i = 1; i < n; i++){
+ if(fabs(rgba[0][0] - rgba[i][0]) > threshold[0] ||
+ fabs(rgba[0][1] - rgba[i][1]) > threshold[1] ||
+ fabs(rgba[0][2] - rgba[i][2]) > threshold[2])
+ return GL_FALSE;
+ }
+
+ return GL_TRUE;
+}
+
+static void gl2psSetLastColor(GL2PSrgba rgba)
+{
+ int i;
+ for(i = 0; i < 3; ++i){
+ gl2ps->lastrgba[i] = rgba[i];
+ }
+}
+
+static GLfloat gl2psGetRGB(GL2PSimage *im, GLuint x, GLuint y,
+ GLfloat *red, GLfloat *green, GLfloat *blue)
+{
+
+ GLsizei width = im->width;
+ GLsizei height = im->height;
+ GLfloat *pixels = im->pixels;
+ GLfloat *pimag;
+
+ /* OpenGL image is from down to up, PS image is up to down */
+ switch(im->format){
+ case GL_RGBA:
+ pimag = pixels + 4 * (width * (height - 1 - y) + x);
+ break;
+ case GL_RGB:
+ default:
+ pimag = pixels + 3 * (width * (height - 1 - y) + x);
+ break;
+ }
+ *red = *pimag; pimag++;
+ *green = *pimag; pimag++;
+ *blue = *pimag; pimag++;
+
+ return (im->format == GL_RGBA) ? *pimag : 1.0F;
+}
+
+/* Helper routines for pixmaps */
+
+static GL2PSimage *gl2psCopyPixmap(GL2PSimage *im)
+{
+ int size;
+ GL2PSimage *image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage));
+
+ image->width = im->width;
+ image->height = im->height;
+ image->format = im->format;
+ image->type = im->type;
+
+ switch(image->format){
+ case GL_RGBA:
+ size = image->height * image->width * 4 * sizeof(GLfloat);
+ break;
+ case GL_RGB:
+ default:
+ size = image->height * image->width * 3 * sizeof(GLfloat);
+ break;
+ }
+
+ image->pixels = (GLfloat*)gl2psMalloc(size);
+ memcpy(image->pixels, im->pixels, size);
+
+ return image;
+}
+
+static void gl2psFreePixmap(GL2PSimage *im)
+{
+ if(!im)
+ return;
+ gl2psFree(im->pixels);
+ gl2psFree(im);
+}
+
+#if defined(GL2PS_HAVE_LIBPNG)
+
+#if !defined(png_jmpbuf)
+# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
+#endif
+
+static void gl2psUserWritePNG(png_structp png_ptr, png_bytep data, png_size_t length)
+{
+ unsigned int i;
+ GL2PSlist *png = (GL2PSlist*)png_get_io_ptr(png_ptr);
+ for(i = 0; i < length; i++)
+ gl2psListAdd(png, &data[i]);
+}
+
+static void gl2psUserFlushPNG(png_structp png_ptr)
+{
+}
+
+static void gl2psConvertPixmapToPNG(GL2PSimage *pixmap, GL2PSlist *png)
+{
+ png_structp png_ptr;
+ png_infop info_ptr;
+ unsigned char *row_data;
+ GLfloat dr, dg, db;
+ int row, col;
+
+ if(!(png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL)))
+ return;
+
+ if(!(info_ptr = png_create_info_struct(png_ptr))){
+ png_destroy_write_struct(&png_ptr, NULL);
+ return;
+ }
+
+ if(setjmp(png_jmpbuf(png_ptr))) {
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ return;
+ }
+
+ png_set_write_fn(png_ptr, (void *)png, gl2psUserWritePNG, gl2psUserFlushPNG);
+ png_set_compression_level(png_ptr, Z_DEFAULT_COMPRESSION);
+ png_set_IHDR(png_ptr, info_ptr, pixmap->width, pixmap->height, 8,
+ PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE,
+ PNG_FILTER_TYPE_BASE);
+ png_write_info(png_ptr, info_ptr);
+
+ row_data = (unsigned char*)gl2psMalloc(3 * pixmap->width * sizeof(unsigned char));
+ for(row = 0; row < pixmap->height; row++){
+ for(col = 0; col < pixmap->width; col++){
+ gl2psGetRGB(pixmap, col, row, &dr, &dg, &db);
+ row_data[3*col] = (unsigned char)(255. * dr);
+ row_data[3*col+1] = (unsigned char)(255. * dg);
+ row_data[3*col+2] = (unsigned char)(255. * db);
+ }
+ png_write_row(png_ptr, (png_bytep)row_data);
+ }
+ gl2psFree(row_data);
+
+ png_write_end(png_ptr, info_ptr);
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+}
+
+#endif
+
+/* Helper routines for text strings */
+
+static GLint gl2psAddText(GLint type, const char *str, const char *fontname,
+ GLshort fontsize, GLint alignment, GLfloat angle)
+{
+ GLfloat pos[4];
+ GL2PSprimitive *prim;
+ GLboolean valid;
+
+ if(!gl2ps || !str || !fontname) return GL2PS_UNINITIALIZED;
+
+ if(gl2ps->options & GL2PS_NO_TEXT) return GL2PS_SUCCESS;
+
+ glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid);
+ if(GL_FALSE == valid) return GL2PS_SUCCESS; /* the primitive is culled */
+
+ glGetFloatv(GL_CURRENT_RASTER_POSITION, pos);
+
+ prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
+ prim->type = type;
+ prim->boundary = 0;
+ prim->numverts = 1;
+ prim->verts = (GL2PSvertex*)gl2psMalloc(sizeof(GL2PSvertex));
+ prim->verts[0].xyz[0] = pos[0];
+ prim->verts[0].xyz[1] = pos[1];
+ prim->verts[0].xyz[2] = pos[2];
+ prim->culled = 0;
+ prim->offset = 0;
+ prim->pattern = 0;
+ prim->factor = 0;
+ prim->width = 1;
+ glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba);
+ prim->data.text = (GL2PSstring*)gl2psMalloc(sizeof(GL2PSstring));
+ prim->data.text->str = (char*)gl2psMalloc((strlen(str)+1)*sizeof(char));
+ strcpy(prim->data.text->str, str);
+ prim->data.text->fontname = (char*)gl2psMalloc((strlen(fontname)+1)*sizeof(char));
+ strcpy(prim->data.text->fontname, fontname);
+ prim->data.text->fontsize = fontsize;
+ prim->data.text->alignment = alignment;
+ prim->data.text->angle = angle;
+
+ gl2psListAdd(gl2ps->auxprimitives, &prim);
+ glPassThrough(GL2PS_TEXT_TOKEN);
+
+ return GL2PS_SUCCESS;
+}
+
+static GL2PSstring *gl2psCopyText(GL2PSstring *t)
+{
+ GL2PSstring *text = (GL2PSstring*)gl2psMalloc(sizeof(GL2PSstring));
+ text->str = (char*)gl2psMalloc((strlen(t->str)+1)*sizeof(char));
+ strcpy(text->str, t->str);
+ text->fontname = (char*)gl2psMalloc((strlen(t->fontname)+1)*sizeof(char));
+ strcpy(text->fontname, t->fontname);
+ text->fontsize = t->fontsize;
+ text->alignment = t->alignment;
+ text->angle = t->angle;
+
+ return text;
+}
+
+static void gl2psFreeText(GL2PSstring *text)
+{
+ if(!text)
+ return;
+ gl2psFree(text->str);
+ gl2psFree(text->fontname);
+ gl2psFree(text);
+}
+
+/* Helpers for blending modes */
+
+static GLboolean gl2psSupportedBlendMode(GLenum sfactor, GLenum dfactor)
+{
+ /* returns TRUE if gl2ps supports the argument combination: only two
+ blending modes have been implemented so far */
+
+ if( (sfactor == GL_SRC_ALPHA && dfactor == GL_ONE_MINUS_SRC_ALPHA) ||
+ (sfactor == GL_ONE && dfactor == GL_ZERO) )
+ return GL_TRUE;
+ return GL_FALSE;
+}
+
+static void gl2psAdaptVertexForBlending(GL2PSvertex *v)
+{
+ /* Transforms vertex depending on the actual blending function -
+ currently the vertex v is considered as source vertex and his
+ alpha value is changed to 1.0 if source blending GL_ONE is
+ active. This might be extended in the future */
+
+ if(!v || !gl2ps)
+ return;
+
+ if(gl2ps->options & GL2PS_NO_BLENDING || !gl2ps->blending){
+ v->rgba[3] = 1.0F;
+ return;
+ }
+
+ switch(gl2ps->blendfunc[0]){
+ case GL_ONE:
+ v->rgba[3] = 1.0F;
+ break;
+ default:
+ break;
+ }
+}
+
+static void gl2psAssignTriangleProperties(GL2PStriangle *t)
+{
+ /* int i; */
+
+ t->prop = T_VAR_COLOR;
+
+ /* Uncommenting the following lines activates an even more fine
+ grained distinction between triangle types - please don't delete,
+ a remarkable amount of PDF handling code inside this file depends
+ on it if activated */
+ /*
+ t->prop = T_CONST_COLOR;
+ for(i = 0; i < 3; ++i){
+ if(!GL2PS_ZERO(t->vertex[0].rgba[i] - t->vertex[1].rgba[i]) ||
+ !GL2PS_ZERO(t->vertex[1].rgba[i] - t->vertex[2].rgba[i])){
+ t->prop = T_VAR_COLOR;
+ break;
+ }
+ }
+ */
+
+ if(!GL2PS_ZERO(t->vertex[0].rgba[3] - t->vertex[1].rgba[3]) ||
+ !GL2PS_ZERO(t->vertex[1].rgba[3] - t->vertex[2].rgba[3])){
+ t->prop |= T_VAR_ALPHA;
+ }
+ else{
+ if(t->vertex[0].rgba[3] < 1)
+ t->prop |= T_ALPHA_LESS_1;
+ else
+ t->prop |= T_ALPHA_1;
+ }
+}
+
+static void gl2psFillTriangleFromPrimitive(GL2PStriangle *t, GL2PSprimitive *p,
+ GLboolean assignprops)
+{
+ t->vertex[0] = p->verts[0];
+ t->vertex[1] = p->verts[1];
+ t->vertex[2] = p->verts[2];
+ if(GL_TRUE == assignprops)
+ gl2psAssignTriangleProperties(t);
+}
+
+static void gl2psInitTriangle(GL2PStriangle *t)
+{
+ int i;
+ GL2PSvertex vertex = { {-1.0F, -1.0F, -1.0F}, {-1.0F, -1.0F, -1.0F, -1.0F} };
+ for(i = 0; i < 3; i++)
+ t->vertex[i] = vertex;
+ t->prop = T_UNDEFINED;
+}
+
+/* Miscellaneous helper routines */
+
+static GL2PSprimitive *gl2psCopyPrimitive(GL2PSprimitive *p)
+{
+ GL2PSprimitive *prim;
+
+ if(!p){
+ gl2psMsg(GL2PS_ERROR, "Trying to copy an empty primitive");
+ return NULL;
+ }
+
+ prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
+
+ prim->type = p->type;
+ prim->numverts = p->numverts;
+ prim->boundary = p->boundary;
+ prim->offset = p->offset;
+ prim->pattern = p->pattern;
+ prim->factor = p->factor;
+ prim->culled = p->culled;
+ prim->width = p->width;
+ prim->verts = (GL2PSvertex*)gl2psMalloc(p->numverts*sizeof(GL2PSvertex));
+ memcpy(prim->verts, p->verts, p->numverts * sizeof(GL2PSvertex));
+
+ switch(prim->type){
+ case GL2PS_PIXMAP :
+ prim->data.image = gl2psCopyPixmap(p->data.image);
+ break;
+ case GL2PS_TEXT :
+ case GL2PS_SPECIAL :
+ prim->data.text = gl2psCopyText(p->data.text);
+ break;
+ default:
+ break;
+ }
+
+ return prim;
+}
+
+static GLboolean gl2psSamePosition(GL2PSxyz p1, GL2PSxyz p2)
+{
+ if(!GL2PS_ZERO(p1[0] - p2[0]) ||
+ !GL2PS_ZERO(p1[1] - p2[1]) ||
+ !GL2PS_ZERO(p1[2] - p2[2]))
+ return GL_FALSE;
+ return GL_TRUE;
+}
+
+/*********************************************************************
+ *
+ * 3D sorting routines
+ *
+ *********************************************************************/
+
+static GLfloat gl2psComparePointPlane(GL2PSxyz point, GL2PSplane plane)
+{
+ return(plane[0] * point[0] +
+ plane[1] * point[1] +
+ plane[2] * point[2] +
+ plane[3]);
+}
+
+static GLfloat gl2psPsca(GLfloat *a, GLfloat *b)
+{
+ return(a[0]*b[0] + a[1]*b[1] + a[2]*b[2]);
+}
+
+static void gl2psPvec(GLfloat *a, GLfloat *b, GLfloat *c)
+{
+ c[0] = a[1]*b[2] - a[2]*b[1];
+ c[1] = a[2]*b[0] - a[0]*b[2];
+ c[2] = a[0]*b[1] - a[1]*b[0];
+}
+
+static GLfloat gl2psNorm(GLfloat *a)
+{
+ return (GLfloat)sqrt(a[0]*a[0] + a[1]*a[1] + a[2]*a[2]);
+}
+
+static void gl2psGetNormal(GLfloat *a, GLfloat *b, GLfloat *c)
+{
+ GLfloat norm;
+
+ gl2psPvec(a, b, c);
+ if(!GL2PS_ZERO(norm = gl2psNorm(c))){
+ c[0] = c[0] / norm;
+ c[1] = c[1] / norm;
+ c[2] = c[2] / norm;
+ }
+ else{
+ /* The plane is still wrong despite our tests in gl2psGetPlane.
+ Let's return a dummy value for now (this is a hack: we should
+ do more intelligent tests in GetPlane) */
+ c[0] = c[1] = 0.0F;
+ c[2] = 1.0F;
+ }
+}
+
+static void gl2psGetPlane(GL2PSprimitive *prim, GL2PSplane plane)
+{
+ GL2PSxyz v = {0.0F, 0.0F, 0.0F}, w = {0.0F, 0.0F, 0.0F};
+
+ switch(prim->type){
+ case GL2PS_TRIANGLE :
+ case GL2PS_QUADRANGLE :
+ v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0];
+ v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1];
+ v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2];
+ w[0] = prim->verts[2].xyz[0] - prim->verts[0].xyz[0];
+ w[1] = prim->verts[2].xyz[1] - prim->verts[0].xyz[1];
+ w[2] = prim->verts[2].xyz[2] - prim->verts[0].xyz[2];
+ if((GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])) ||
+ (GL2PS_ZERO(w[0]) && GL2PS_ZERO(w[1]) && GL2PS_ZERO(w[2]))){
+ plane[0] = plane[1] = 0.0F;
+ plane[2] = 1.0F;
+ plane[3] = -prim->verts[0].xyz[2];
+ }
+ else{
+ gl2psGetNormal(v, w, plane);
+ plane[3] =
+ - plane[0] * prim->verts[0].xyz[0]
+ - plane[1] * prim->verts[0].xyz[1]
+ - plane[2] * prim->verts[0].xyz[2];
+ }
+ break;
+ case GL2PS_LINE :
+ v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0];
+ v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1];
+ v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2];
+ if(GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])){
+ plane[0] = plane[1] = 0.0F;
+ plane[2] = 1.0F;
+ plane[3] = -prim->verts[0].xyz[2];
+ }
+ else{
+ if(GL2PS_ZERO(v[0])) w[0] = 1.0F;
+ else if(GL2PS_ZERO(v[1])) w[1] = 1.0F;
+ else w[2] = 1.0F;
+ gl2psGetNormal(v, w, plane);
+ plane[3] =
+ - plane[0] * prim->verts[0].xyz[0]
+ - plane[1] * prim->verts[0].xyz[1]
+ - plane[2] * prim->verts[0].xyz[2];
+ }
+ break;
+ case GL2PS_POINT :
+ case GL2PS_PIXMAP :
+ case GL2PS_TEXT :
+ case GL2PS_SPECIAL :
+ case GL2PS_IMAGEMAP:
+ plane[0] = plane[1] = 0.0F;
+ plane[2] = 1.0F;
+ plane[3] = -prim->verts[0].xyz[2];
+ break;
+ default :
+ gl2psMsg(GL2PS_ERROR, "Unknown primitive type in BSP tree");
+ plane[0] = plane[1] = plane[3] = 0.0F;
+ plane[2] = 1.0F;
+ break;
+ }
+}
+
+static void gl2psCutEdge(GL2PSvertex *a, GL2PSvertex *b, GL2PSplane plane,
+ GL2PSvertex *c)
+{
+ GL2PSxyz v;
+ GLfloat sect;
+
+ v[0] = b->xyz[0] - a->xyz[0];
+ v[1] = b->xyz[1] - a->xyz[1];
+ v[2] = b->xyz[2] - a->xyz[2];
+
+ sect = - gl2psComparePointPlane(a->xyz, plane) / gl2psPsca(plane, v);
+
+ c->xyz[0] = a->xyz[0] + v[0] * sect;
+ c->xyz[1] = a->xyz[1] + v[1] * sect;
+ c->xyz[2] = a->xyz[2] + v[2] * sect;
+
+ c->rgba[0] = (1 - sect) * a->rgba[0] + sect * b->rgba[0];
+ c->rgba[1] = (1 - sect) * a->rgba[1] + sect * b->rgba[1];
+ c->rgba[2] = (1 - sect) * a->rgba[2] + sect * b->rgba[2];
+ c->rgba[3] = (1 - sect) * a->rgba[3] + sect * b->rgba[3];
+}
+
+static void gl2psCreateSplitPrimitive(GL2PSprimitive *parent, GL2PSplane plane,
+ GL2PSprimitive *child, GLshort numverts,
+ GLshort *index0, GLshort *index1)
+{
+ GLshort i;
+
+ if(parent->type == GL2PS_IMAGEMAP){
+ child->type = GL2PS_IMAGEMAP;
+ child->data.image = parent->data.image;
+ }
+ else{
+ if(numverts > 4){
+ gl2psMsg(GL2PS_WARNING, "%d vertices in polygon", numverts);
+ numverts = 4;
+ }
+ switch(numverts){
+ case 1 : child->type = GL2PS_POINT; break;
+ case 2 : child->type = GL2PS_LINE; break;
+ case 3 : child->type = GL2PS_TRIANGLE; break;
+ case 4 : child->type = GL2PS_QUADRANGLE; break;
+ default: child->type = GL2PS_NO_TYPE; break;
+ }
+ }
+
+ child->boundary = 0; /* FIXME: not done! */
+ child->culled = parent->culled;
+ child->offset = parent->offset;
+ child->pattern = parent->pattern;
+ child->factor = parent->factor;
+ child->width = parent->width;
+ child->numverts = numverts;
+ child->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex));
+
+ for(i = 0; i < numverts; i++){
+ if(index1[i] < 0){
+ child->verts[i] = parent->verts[index0[i]];
+ }
+ else{
+ gl2psCutEdge(&parent->verts[index0[i]], &parent->verts[index1[i]],
+ plane, &child->verts[i]);
+ }
+ }
+}
+
+static void gl2psAddIndex(GLshort *index0, GLshort *index1, GLshort *nb,
+ GLshort i, GLshort j)
+{
+ GLint k;
+
+ for(k = 0; k < *nb; k++){
+ if((index0[k] == i && index1[k] == j) ||
+ (index1[k] == i && index0[k] == j)) return;
+ }
+ index0[*nb] = i;
+ index1[*nb] = j;
+ (*nb)++;
+}
+
+static GLshort gl2psGetIndex(GLshort i, GLshort num)
+{
+ return (i < num - 1) ? i + 1 : 0;
+}
+
+static GLint gl2psTestSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane)
+{
+ GLint type = GL2PS_COINCIDENT;
+ GLshort i, j;
+ GLfloat d[5];
+
+ for(i = 0; i < prim->numverts; i++){
+ d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane);
+ }
+
+ if(prim->numverts < 2){
+ return 0;
+ }
+ else{
+ for(i = 0; i < prim->numverts; i++){
+ j = gl2psGetIndex(i, prim->numverts);
+ if(d[j] > GL2PS_EPSILON){
+ if(type == GL2PS_COINCIDENT) type = GL2PS_IN_BACK_OF;
+ else if(type != GL2PS_IN_BACK_OF) return 1;
+ if(d[i] < -GL2PS_EPSILON) return 1;
+ }
+ else if(d[j] < -GL2PS_EPSILON){
+ if(type == GL2PS_COINCIDENT) type = GL2PS_IN_FRONT_OF;
+ else if(type != GL2PS_IN_FRONT_OF) return 1;
+ if(d[i] > GL2PS_EPSILON) return 1;
+ }
+ }
+ }
+ return 0;
+}
+
+static GLint gl2psSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane,
+ GL2PSprimitive **front, GL2PSprimitive **back)
+{
+ GLshort i, j, in = 0, out = 0, in0[5], in1[5], out0[5], out1[5];
+ GLint type;
+ GLfloat d[5];
+
+ type = GL2PS_COINCIDENT;
+
+ for(i = 0; i < prim->numverts; i++){
+ d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane);
+ }
+
+ switch(prim->type){
+ case GL2PS_POINT :
+ if(d[0] > GL2PS_EPSILON) type = GL2PS_IN_BACK_OF;
+ else if(d[0] < -GL2PS_EPSILON) type = GL2PS_IN_FRONT_OF;
+ else type = GL2PS_COINCIDENT;
+ break;
+ default :
+ for(i = 0; i < prim->numverts; i++){
+ j = gl2psGetIndex(i, prim->numverts);
+ if(d[j] > GL2PS_EPSILON){
+ if(type == GL2PS_COINCIDENT) type = GL2PS_IN_BACK_OF;
+ else if(type != GL2PS_IN_BACK_OF) type = GL2PS_SPANNING;
+ if(d[i] < -GL2PS_EPSILON){
+ gl2psAddIndex(in0, in1, &in, i, j);
+ gl2psAddIndex(out0, out1, &out, i, j);
+ type = GL2PS_SPANNING;
+ }
+ gl2psAddIndex(out0, out1, &out, j, -1);
+ }
+ else if(d[j] < -GL2PS_EPSILON){
+ if(type == GL2PS_COINCIDENT) type = GL2PS_IN_FRONT_OF;
+ else if(type != GL2PS_IN_FRONT_OF) type = GL2PS_SPANNING;
+ if(d[i] > GL2PS_EPSILON){
+ gl2psAddIndex(in0, in1, &in, i, j);
+ gl2psAddIndex(out0, out1, &out, i, j);
+ type = GL2PS_SPANNING;
+ }
+ gl2psAddIndex(in0, in1, &in, j, -1);
+ }
+ else{
+ gl2psAddIndex(in0, in1, &in, j, -1);
+ gl2psAddIndex(out0, out1, &out, j, -1);
+ }
+ }
+ break;
+ }
+
+ if(type == GL2PS_SPANNING){
+ *back = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
+ *front = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
+ gl2psCreateSplitPrimitive(prim, plane, *back, out, out0, out1);
+ gl2psCreateSplitPrimitive(prim, plane, *front, in, in0, in1);
+ }
+
+ return type;
+}
+
+static void gl2psDivideQuad(GL2PSprimitive *quad,
+ GL2PSprimitive **t1, GL2PSprimitive **t2)
+{
+ *t1 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
+ *t2 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
+ (*t1)->type = (*t2)->type = GL2PS_TRIANGLE;
+ (*t1)->numverts = (*t2)->numverts = 3;
+ (*t1)->culled = (*t2)->culled = quad->culled;
+ (*t1)->offset = (*t2)->offset = quad->offset;
+ (*t1)->pattern = (*t2)->pattern = quad->pattern;
+ (*t1)->factor = (*t2)->factor = quad->factor;
+ (*t1)->width = (*t2)->width = quad->width;
+ (*t1)->verts = (GL2PSvertex*)gl2psMalloc(3 * sizeof(GL2PSvertex));
+ (*t2)->verts = (GL2PSvertex*)gl2psMalloc(3 * sizeof(GL2PSvertex));
+ (*t1)->verts[0] = quad->verts[0];
+ (*t1)->verts[1] = quad->verts[1];
+ (*t1)->verts[2] = quad->verts[2];
+ (*t1)->boundary = ((quad->boundary & 1) ? 1 : 0) | ((quad->boundary & 2) ? 2 : 0);
+ (*t2)->verts[0] = quad->verts[0];
+ (*t2)->verts[1] = quad->verts[2];
+ (*t2)->verts[2] = quad->verts[3];
+ (*t1)->boundary = ((quad->boundary & 4) ? 2 : 0) | ((quad->boundary & 4) ? 2 : 0);
+}
+
+static int gl2psCompareDepth(const void *a, const void *b)
+{
+ GL2PSprimitive *q, *w;
+ GLfloat dq = 0.0F, dw = 0.0F, diff;
+ int i;
+
+ q = *(GL2PSprimitive**)a;
+ w = *(GL2PSprimitive**)b;
+
+ for(i = 0; i < q->numverts; i++){
+ dq += q->verts[i].xyz[2];
+ }
+ dq /= (GLfloat)q->numverts;
+
+ for(i = 0; i < w->numverts; i++){
+ dw += w->verts[i].xyz[2];
+ }
+ dw /= (GLfloat)w->numverts;
+
+ diff = dq - dw;
+ if(diff > 0.){
+ return -1;
+ }
+ else if(diff < 0.){
+ return 1;
+ }
+ else{
+ return 0;
+ }
+}
+
+static int gl2psTrianglesFirst(const void *a, const void *b)
+{
+ GL2PSprimitive *q, *w;
+
+ q = *(GL2PSprimitive**)a;
+ w = *(GL2PSprimitive**)b;
+ return(q->type < w->type ? 1 : -1);
+}
+
+static GLint gl2psFindRoot(GL2PSlist *primitives, GL2PSprimitive **root)
+{
+ GLint i, j, count, best = 1000000, index = 0;
+ GL2PSprimitive *prim1, *prim2;
+ GL2PSplane plane;
+ GLint maxp;
+
+ if(!gl2psListNbr(primitives)){
+ gl2psMsg(GL2PS_ERROR, "Cannot fint root in empty primitive list");
+ return 0;
+ }
+
+ *root = *(GL2PSprimitive**)gl2psListPointer(primitives, 0);
+
+ if(gl2ps->options & GL2PS_BEST_ROOT){
+ maxp = gl2psListNbr(primitives);
+ if(maxp > gl2ps->maxbestroot){
+ maxp = gl2ps->maxbestroot;
+ }
+ for(i = 0; i < maxp; i++){
+ prim1 = *(GL2PSprimitive**)gl2psListPointer(primitives, i);
+ gl2psGetPlane(prim1, plane);
+ count = 0;
+ for(j = 0; j < gl2psListNbr(primitives); j++){
+ if(j != i){
+ prim2 = *(GL2PSprimitive**)gl2psListPointer(primitives, j);
+ count += gl2psTestSplitPrimitive(prim2, plane);
+ }
+ if(count > best) break;
+ }
+ if(count < best){
+ best = count;
+ index = i;
+ *root = prim1;
+ if(!count) return index;
+ }
+ }
+ /* if(index) gl2psMsg(GL2PS_INFO, "GL2PS_BEST_ROOT was worth it: %d", index); */
+ return index;
+ }
+ else{
+ return 0;
+ }
+}
+
+static void gl2psFreeImagemap(GL2PSimagemap *list){
+ GL2PSimagemap *next;
+ while(list != NULL){
+ next = list->next;
+ gl2psFree(list->image->pixels);
+ gl2psFree(list->image);
+ gl2psFree(list);
+ list = next;
+ }
+}
+
+static void gl2psFreePrimitive(void *data)
+{
+ GL2PSprimitive *q;
+
+ q = *(GL2PSprimitive**)data;
+ gl2psFree(q->verts);
+ if(q->type == GL2PS_TEXT || q->type == GL2PS_SPECIAL){
+ gl2psFreeText(q->data.text);
+ }
+ else if(q->type == GL2PS_PIXMAP){
+ gl2psFreePixmap(q->data.image);
+ }
+ gl2psFree(q);
+}
+
+static void gl2psAddPrimitiveInList(GL2PSprimitive *prim, GL2PSlist *list)
+{
+ GL2PSprimitive *t1, *t2;
+
+ if(prim->type != GL2PS_QUADRANGLE){
+ gl2psListAdd(list, &prim);
+ }
+ else{
+ gl2psDivideQuad(prim, &t1, &t2);
+ gl2psListAdd(list, &t1);
+ gl2psListAdd(list, &t2);
+ gl2psFreePrimitive(&prim);
+ }
+
+}
+
+static void gl2psFreeBspTree(GL2PSbsptree **tree)
+{
+ if(*tree){
+ if((*tree)->back) gl2psFreeBspTree(&(*tree)->back);
+ if((*tree)->primitives){
+ gl2psListAction((*tree)->primitives, gl2psFreePrimitive);
+ gl2psListDelete((*tree)->primitives);
+ }
+ if((*tree)->front) gl2psFreeBspTree(&(*tree)->front);
+ gl2psFree(*tree);
+ *tree = NULL;
+ }
+}
+
+static GLboolean gl2psGreater(GLfloat f1, GLfloat f2)
+{
+ if(f1 > f2) return GL_TRUE;
+ else return GL_FALSE;
+}
+
+static GLboolean gl2psLess(GLfloat f1, GLfloat f2)
+{
+ if(f1 < f2) return GL_TRUE;
+ else return GL_FALSE;
+}
+
+static void gl2psBuildBspTree(GL2PSbsptree *tree, GL2PSlist *primitives)
+{
+ GL2PSprimitive *prim, *frontprim = NULL, *backprim = NULL;
+ GL2PSlist *frontlist, *backlist;
+ GLint i, index;
+
+ tree->front = NULL;
+ tree->back = NULL;
+ tree->primitives = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
+ index = gl2psFindRoot(primitives, &prim);
+ gl2psGetPlane(prim, tree->plane);
+ gl2psAddPrimitiveInList(prim, tree->primitives);
+
+ frontlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
+ backlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
+
+ for(i = 0; i < gl2psListNbr(primitives); i++){
+ if(i != index){
+ prim = *(GL2PSprimitive**)gl2psListPointer(primitives,i);
+ switch(gl2psSplitPrimitive(prim, tree->plane, &frontprim, &backprim)){
+ case GL2PS_COINCIDENT:
+ gl2psAddPrimitiveInList(prim, tree->primitives);
+ break;
+ case GL2PS_IN_BACK_OF:
+ gl2psAddPrimitiveInList(prim, backlist);
+ break;
+ case GL2PS_IN_FRONT_OF:
+ gl2psAddPrimitiveInList(prim, frontlist);
+ break;
+ case GL2PS_SPANNING:
+ gl2psAddPrimitiveInList(backprim, backlist);
+ gl2psAddPrimitiveInList(frontprim, frontlist);
+ gl2psFreePrimitive(&prim);
+ break;
+ }
+ }
+ }
+
+ if(gl2psListNbr(tree->primitives)){
+ gl2psListSort(tree->primitives, gl2psTrianglesFirst);
+ }
+
+ if(gl2psListNbr(frontlist)){
+ gl2psListSort(frontlist, gl2psTrianglesFirst);
+ tree->front = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree));
+ gl2psBuildBspTree(tree->front, frontlist);
+ }
+ else{
+ gl2psListDelete(frontlist);
+ }
+
+ if(gl2psListNbr(backlist)){
+ gl2psListSort(backlist, gl2psTrianglesFirst);
+ tree->back = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree));
+ gl2psBuildBspTree(tree->back, backlist);
+ }
+ else{
+ gl2psListDelete(backlist);
+ }
+
+ gl2psListDelete(primitives);
+}
+
+static void gl2psTraverseBspTree(GL2PSbsptree *tree, GL2PSxyz eye, GLfloat epsilon,
+ GLboolean (*compare)(GLfloat f1, GLfloat f2),
+ void (*action)(void *data), int inverse)
+{
+ GLfloat result;
+
+ if(!tree) return;
+
+ result = gl2psComparePointPlane(eye, tree->plane);
+
+ if(GL_TRUE == compare(result, epsilon)){
+ gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse);
+ if(inverse){
+ gl2psListActionInverse(tree->primitives, action);
+ }
+ else{
+ gl2psListAction(tree->primitives, action);
+ }
+ gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse);
+ }
+ else if(GL_TRUE == compare(-epsilon, result)){
+ gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse);
+ if(inverse){
+ gl2psListActionInverse(tree->primitives, action);
+ }
+ else{
+ gl2psListAction(tree->primitives, action);
+ }
+ gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse);
+ }
+ else{
+ gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse);
+ gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse);
+ }
+}
+
+static void gl2psRescaleAndOffset()
+{
+ GL2PSprimitive *prim;
+ GLfloat minZ, maxZ, rangeZ, scaleZ;
+ GLfloat factor, units, area, dZ, dZdX, dZdY, maxdZ;
+ int i, j;
+
+ if(!gl2psListNbr(gl2ps->primitives))
+ return;
+
+ /* get z-buffer range */
+ prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, 0);
+ minZ = maxZ = prim->verts[0].xyz[2];
+ for(i = 1; i < prim->numverts; i++){
+ if(prim->verts[i].xyz[2] < minZ) minZ = prim->verts[i].xyz[2];
+ if(prim->verts[i].xyz[2] > maxZ) maxZ = prim->verts[i].xyz[2];
+ }
+ for(i = 1; i < gl2psListNbr(gl2ps->primitives); i++){
+ prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, i);
+ for(j = 0; j < prim->numverts; j++){
+ if(prim->verts[j].xyz[2] < minZ) minZ = prim->verts[j].xyz[2];
+ if(prim->verts[j].xyz[2] > maxZ) maxZ = prim->verts[j].xyz[2];
+ }
+ }
+ rangeZ = (maxZ - minZ);
+
+ /* rescale z-buffer coordinate in [0,GL2PS_ZSCALE], to make it of
+ the same order of magnitude as the x and y coordinates */
+ scaleZ = GL2PS_ZERO(rangeZ) ? GL2PS_ZSCALE : (GL2PS_ZSCALE / rangeZ);
+ /* avoid precision loss (we use floats!) */
+ if(scaleZ > 100000.F) scaleZ = 100000.F;
+
+ /* apply offsets */
+ for(i = 0; i < gl2psListNbr(gl2ps->primitives); i++){
+ prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, i);
+ for(j = 0; j < prim->numverts; j++){
+ prim->verts[j].xyz[2] = (prim->verts[j].xyz[2] - minZ) * scaleZ;
+ }
+ if((gl2ps->options & GL2PS_SIMPLE_LINE_OFFSET) &&
+ (prim->type == GL2PS_LINE)){
+ if(gl2ps->sort == GL2PS_SIMPLE_SORT){
+ prim->verts[0].xyz[2] -= GL2PS_ZOFFSET_LARGE;
+ prim->verts[1].xyz[2] -= GL2PS_ZOFFSET_LARGE;
+ }
+ else{
+ prim->verts[0].xyz[2] -= GL2PS_ZOFFSET;
+ prim->verts[1].xyz[2] -= GL2PS_ZOFFSET;
+ }
+ }
+ else if(prim->offset && (prim->type == GL2PS_TRIANGLE)){
+ factor = gl2ps->offset[0];
+ units = gl2ps->offset[1];
+ area =
+ (prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) *
+ (prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) -
+ (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) *
+ (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]);
+ dZdX =
+ ((prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) *
+ (prim->verts[1].xyz[2] - prim->verts[0].xyz[2]) -
+ (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]) *
+ (prim->verts[2].xyz[2] - prim->verts[1].xyz[2])) / area;
+ dZdY =
+ ((prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) *
+ (prim->verts[2].xyz[2] - prim->verts[1].xyz[2]) -
+ (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) *
+ (prim->verts[1].xyz[2] - prim->verts[0].xyz[2])) / area;
+ maxdZ = (GLfloat)sqrt(dZdX * dZdX + dZdY * dZdY);
+ dZ = factor * maxdZ + units;
+ prim->verts[0].xyz[2] += dZ;
+ prim->verts[1].xyz[2] += dZ;
+ prim->verts[2].xyz[2] += dZ;
+ }
+ }
+}
+
+/*********************************************************************
+ *
+ * 2D sorting routines (for occlusion culling)
+ *
+ *********************************************************************/
+
+static GLint gl2psGetPlaneFromPoints(GL2PSxyz a, GL2PSxyz b, GL2PSplane plane)
+{
+ GLfloat n;
+
+ plane[0] = b[1] - a[1];
+ plane[1] = a[0] - b[0];
+ n = (GLfloat)sqrt(plane[0]*plane[0] + plane[1]*plane[1]);
+ plane[2] = 0.0F;
+ if(!GL2PS_ZERO(n)){
+ plane[0] /= n;
+ plane[1] /= n;
+ plane[3] = -plane[0]*a[0]-plane[1]*a[1];
+ return 1;
+ }
+ else{
+ plane[0] = -1.0F;
+ plane[1] = 0.0F;
+ plane[3] = a[0];
+ return 0;
+ }
+}
+
+static void gl2psFreeBspImageTree(GL2PSbsptree2d **tree)
+{
+ if(*tree){
+ if((*tree)->back) gl2psFreeBspImageTree(&(*tree)->back);
+ if((*tree)->front) gl2psFreeBspImageTree(&(*tree)->front);
+ gl2psFree(*tree);
+ *tree = NULL;
+ }
+}
+
+static GLint gl2psCheckPoint(GL2PSxyz point, GL2PSplane plane)
+{
+ GLfloat pt_dis;
+
+ pt_dis = gl2psComparePointPlane(point, plane);
+ if(pt_dis > GL2PS_EPSILON) return GL2PS_POINT_INFRONT;
+ else if(pt_dis < -GL2PS_EPSILON) return GL2PS_POINT_BACK;
+ else return GL2PS_POINT_COINCIDENT;
+}
+
+static void gl2psAddPlanesInBspTreeImage(GL2PSprimitive *prim,
+ GL2PSbsptree2d **tree)
+{
+ GLint ret = 0;
+ GLint i;
+ GLint offset = 0;
+ GL2PSbsptree2d *head = NULL, *cur = NULL;
+
+ if((*tree == NULL) && (prim->numverts > 2)){
+ head = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d));
+ for(i = 0; i < prim->numverts-1; i++){
+ if(!gl2psGetPlaneFromPoints(prim->verts[i].xyz,
+ prim->verts[i+1].xyz,
+ head->plane)){
+ if(prim->numverts-i > 3){
+ offset++;
+ }
+ else{
+ gl2psFree(head);
+ return;
+ }
+ }
+ else{
+ break;
+ }
+ }
+ head->back = NULL;
+ head->front = NULL;
+ for(i = 2+offset; i < prim->numverts; i++){
+ ret = gl2psCheckPoint(prim->verts[i].xyz, head->plane);
+ if(ret != GL2PS_POINT_COINCIDENT) break;
+ }
+ switch(ret){
+ case GL2PS_POINT_INFRONT :
+ cur = head;
+ for(i = 1+offset; i < prim->numverts-1; i++){
+ if(cur->front == NULL){
+ cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d));
+ }
+ if(gl2psGetPlaneFromPoints(prim->verts[i].xyz,
+ prim->verts[i+1].xyz,
+ cur->front->plane)){
+ cur = cur->front;
+ cur->front = NULL;
+ cur->back = NULL;
+ }
+ }
+ if(cur->front == NULL){
+ cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d));
+ }
+ if(gl2psGetPlaneFromPoints(prim->verts[i].xyz,
+ prim->verts[offset].xyz,
+ cur->front->plane)){
+ cur->front->front = NULL;
+ cur->front->back = NULL;
+ }
+ else{
+ gl2psFree(cur->front);
+ cur->front = NULL;
+ }
+ break;
+ case GL2PS_POINT_BACK :
+ for(i = 0; i < 4; i++){
+ head->plane[i] = -head->plane[i];
+ }
+ cur = head;
+ for(i = 1+offset; i < prim->numverts-1; i++){
+ if(cur->front == NULL){
+ cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d));
+ }
+ if(gl2psGetPlaneFromPoints(prim->verts[i+1].xyz,
+ prim->verts[i].xyz,
+ cur->front->plane)){
+ cur = cur->front;
+ cur->front = NULL;
+ cur->back = NULL;
+ }
+ }
+ if(cur->front == NULL){
+ cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d));
+ }
+ if(gl2psGetPlaneFromPoints(prim->verts[offset].xyz,
+ prim->verts[i].xyz,
+ cur->front->plane)){
+ cur->front->front = NULL;
+ cur->front->back = NULL;
+ }
+ else{
+ gl2psFree(cur->front);
+ cur->front = NULL;
+ }
+ break;
+ default:
+ gl2psFree(head);
+ return;
+ }
+ (*tree) = head;
+ }
+}
+
+static GLint gl2psCheckPrimitive(GL2PSprimitive *prim, GL2PSplane plane)
+{
+ GLint i;
+ GLint pos;
+
+ pos = gl2psCheckPoint(prim->verts[0].xyz, plane);
+ for(i = 1; i < prim->numverts; i++){
+ pos |= gl2psCheckPoint(prim->verts[i].xyz, plane);
+ if(pos == (GL2PS_POINT_INFRONT | GL2PS_POINT_BACK)) return GL2PS_SPANNING;
+ }
+ if(pos & GL2PS_POINT_INFRONT) return GL2PS_IN_FRONT_OF;
+ else if(pos & GL2PS_POINT_BACK) return GL2PS_IN_BACK_OF;
+ else return GL2PS_COINCIDENT;
+}
+
+static GL2PSprimitive *gl2psCreateSplitPrimitive2D(GL2PSprimitive *parent,
+ GLshort numverts,
+ GL2PSvertex *vertx)
+{
+ GLint i;
+ GL2PSprimitive *child = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
+
+ if(parent->type == GL2PS_IMAGEMAP){
+ child->type = GL2PS_IMAGEMAP;
+ child->data.image = parent->data.image;
+ }
+ else {
+ switch(numverts){
+ case 1 : child->type = GL2PS_POINT; break;
+ case 2 : child->type = GL2PS_LINE; break;
+ case 3 : child->type = GL2PS_TRIANGLE; break;
+ case 4 : child->type = GL2PS_QUADRANGLE; break;
+ default: child->type = GL2PS_NO_TYPE; break; /* FIXME */
+ }
+ }
+ child->boundary = 0; /* FIXME: not done! */
+ child->culled = parent->culled;
+ child->offset = parent->offset;
+ child->pattern = parent->pattern;
+ child->factor = parent->factor;
+ child->width = parent->width;
+ child->numverts = numverts;
+ child->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex));
+ for(i = 0; i < numverts; i++){
+ child->verts[i] = vertx[i];
+ }
+ return child;
+}
+
+static void gl2psSplitPrimitive2D(GL2PSprimitive *prim,
+ GL2PSplane plane,
+ GL2PSprimitive **front,
+ GL2PSprimitive **back)
+{
+ /* cur will hold the position of the current vertex
+ prev will hold the position of the previous vertex
+ prev0 will hold the position of the vertex number 0
+ v1 and v2 represent the current and previous vertices, respectively
+ flag is set if the current vertex should be checked against the plane */
+ GLint cur = -1, prev = -1, i, v1 = 0, v2 = 0, flag = 1, prev0 = -1;
+
+ /* list of vertices that will go in front and back primitive */
+ GL2PSvertex *front_list = NULL, *back_list = NULL;
+
+ /* number of vertices in front and back list */
+ GLshort front_count = 0, back_count = 0;
+
+ for(i = 0; i <= prim->numverts; i++){
+ v1 = i;
+ if(v1 == prim->numverts){
+ if(prim->numverts < 3) break;
+ v1 = 0;
+ v2 = prim->numverts-1;
+ cur = prev0;
+ }
+ else if(flag){
+ cur = gl2psCheckPoint(prim->verts[v1].xyz, plane);
+ if(i == 0){
+ prev0 = cur;
+ }
+ }
+ if(((prev == -1) || (prev == cur) || (prev == 0) || (cur == 0)) &&
+ (i < prim->numverts)){
+ if(cur == GL2PS_POINT_INFRONT){
+ front_count++;
+ front_list = (GL2PSvertex*)gl2psRealloc(front_list,
+ sizeof(GL2PSvertex)*front_count);
+ front_list[front_count-1] = prim->verts[v1];
+ }
+ else if(cur == GL2PS_POINT_BACK){
+ back_count++;
+ back_list = (GL2PSvertex*)gl2psRealloc(back_list,
+ sizeof(GL2PSvertex)*back_count);
+ back_list[back_count-1] = prim->verts[v1];
+ }
+ else{
+ front_count++;
+ front_list = (GL2PSvertex*)gl2psRealloc(front_list,
+ sizeof(GL2PSvertex)*front_count);
+ front_list[front_count-1] = prim->verts[v1];
+ back_count++;
+ back_list = (GL2PSvertex*)gl2psRealloc(back_list,
+ sizeof(GL2PSvertex)*back_count);
+ back_list[back_count-1] = prim->verts[v1];
+ }
+ flag = 1;
+ }
+ else if((prev != cur) && (cur != 0) && (prev != 0)){
+ if(v1 != 0){
+ v2 = v1-1;
+ i--;
+ }
+ front_count++;
+ front_list = (GL2PSvertex*)gl2psRealloc(front_list,
+ sizeof(GL2PSvertex)*front_count);
+ gl2psCutEdge(&prim->verts[v2],
+ &prim->verts[v1],
+ plane,
+ &front_list[front_count-1]);
+ back_count++;
+ back_list = (GL2PSvertex*)gl2psRealloc(back_list,
+ sizeof(GL2PSvertex)*back_count);
+ back_list[back_count-1] = front_list[front_count-1];
+ flag = 0;
+ }
+ prev = cur;
+ }
+ *front = gl2psCreateSplitPrimitive2D(prim, front_count, front_list);
+ *back = gl2psCreateSplitPrimitive2D(prim, back_count, back_list);
+ gl2psFree(front_list);
+ gl2psFree(back_list);
+}
+
+static GLint gl2psAddInBspImageTree(GL2PSprimitive *prim, GL2PSbsptree2d **tree)
+{
+ GLint ret = 0;
+ GL2PSprimitive *frontprim = NULL, *backprim = NULL;
+
+ /* FIXME: until we consider the actual extent of text strings and
+ pixmaps, never cull them. Otherwise the whole string/pixmap gets
+ culled as soon as the reference point is hidden */
+ if(prim->type == GL2PS_PIXMAP ||
+ prim->type == GL2PS_TEXT ||
+ prim->type == GL2PS_SPECIAL){
+ return 1;
+ }
+
+ if(*tree == NULL){
+ if((prim->type != GL2PS_IMAGEMAP) && (GL_FALSE == gl2ps->zerosurfacearea)){
+ gl2psAddPlanesInBspTreeImage(gl2ps->primitivetoadd, tree);
+ }
+ return 1;
+ }
+ else{
+ switch(gl2psCheckPrimitive(prim, (*tree)->plane)){
+ case GL2PS_IN_BACK_OF: return gl2psAddInBspImageTree(prim, &(*tree)->back);
+ case GL2PS_IN_FRONT_OF:
+ if((*tree)->front != NULL) return gl2psAddInBspImageTree(prim, &(*tree)->front);
+ else return 0;
+ case GL2PS_SPANNING:
+ gl2psSplitPrimitive2D(prim, (*tree)->plane, &frontprim, &backprim);
+ ret = gl2psAddInBspImageTree(backprim, &(*tree)->back);
+ if((*tree)->front != NULL){
+ if(gl2psAddInBspImageTree(frontprim, &(*tree)->front)){
+ ret = 1;
+ }
+ }
+ gl2psFree(frontprim->verts);
+ gl2psFree(frontprim);
+ gl2psFree(backprim->verts);
+ gl2psFree(backprim);
+ return ret;
+ case GL2PS_COINCIDENT:
+ if((*tree)->back != NULL){
+ gl2ps->zerosurfacearea = GL_TRUE;
+ ret = gl2psAddInBspImageTree(prim, &(*tree)->back);
+ gl2ps->zerosurfacearea = GL_FALSE;
+ if(ret) return ret;
+ }
+ if((*tree)->front != NULL){
+ gl2ps->zerosurfacearea = GL_TRUE;
+ ret = gl2psAddInBspImageTree(prim, &(*tree)->front);
+ gl2ps->zerosurfacearea = GL_FALSE;
+ if(ret) return ret;
+ }
+ if(prim->type == GL2PS_LINE) return 1;
+ else return 0;
+ }
+ }
+ return 0;
+}
+
+static void gl2psAddInImageTree(void *data)
+{
+ GL2PSprimitive *prim = *(GL2PSprimitive **)data;
+ gl2ps->primitivetoadd = prim;
+ if(prim->type == GL2PS_IMAGEMAP && prim->data.image->format == GL2PS_IMAGEMAP_VISIBLE){
+ prim->culled = 1;
+ }
+ else if(!gl2psAddInBspImageTree(prim, &gl2ps->imagetree)){
+ prim->culled = 1;
+ }
+ else if(prim->type == GL2PS_IMAGEMAP){
+ prim->data.image->format = GL2PS_IMAGEMAP_VISIBLE;
+ }
+}
+
+/* Boundary construction */
+
+static void gl2psAddBoundaryInList(GL2PSprimitive *prim, GL2PSlist *list)
+{
+ GL2PSprimitive *b;
+ GLshort i;
+ GL2PSxyz c;
+
+ c[0] = c[1] = c[2] = 0.0F;
+ for(i = 0; i < prim->numverts; i++){
+ c[0] += prim->verts[i].xyz[0];
+ c[1] += prim->verts[i].xyz[1];
+ }
+ c[0] /= prim->numverts;
+ c[1] /= prim->numverts;
+
+ for(i = 0; i < prim->numverts; i++){
+ if(prim->boundary & (GLint)pow(2., i)){
+ b = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
+ b->type = GL2PS_LINE;
+ b->offset = prim->offset;
+ b->pattern = prim->pattern;
+ b->factor = prim->factor;
+ b->culled = prim->culled;
+ b->width = prim->width;
+ b->boundary = 0;
+ b->numverts = 2;
+ b->verts = (GL2PSvertex*)gl2psMalloc(2 * sizeof(GL2PSvertex));
+
+#if 0 /* FIXME: need to work on boundary offset... */
+ v[0] = c[0] - prim->verts[i].xyz[0];
+ v[1] = c[1] - prim->verts[i].xyz[1];
+ v[2] = 0.0F;
+ norm = gl2psNorm(v);
+ v[0] /= norm;
+ v[1] /= norm;
+ b->verts[0].xyz[0] = prim->verts[i].xyz[0] +0.1*v[0];
+ b->verts[0].xyz[1] = prim->verts[i].xyz[1] +0.1*v[1];
+ b->verts[0].xyz[2] = prim->verts[i].xyz[2];
+ v[0] = c[0] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0];
+ v[1] = c[1] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1];
+ norm = gl2psNorm(v);
+ v[0] /= norm;
+ v[1] /= norm;
+ b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0] +0.1*v[0];
+ b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1] +0.1*v[1];
+ b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2];
+#else
+ b->verts[0].xyz[0] = prim->verts[i].xyz[0];
+ b->verts[0].xyz[1] = prim->verts[i].xyz[1];
+ b->verts[0].xyz[2] = prim->verts[i].xyz[2];
+ b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0];
+ b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1];
+ b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2];
+#endif
+
+ b->verts[0].rgba[0] = 0.0F;
+ b->verts[0].rgba[1] = 0.0F;
+ b->verts[0].rgba[2] = 0.0F;
+ b->verts[0].rgba[3] = 0.0F;
+ b->verts[1].rgba[0] = 0.0F;
+ b->verts[1].rgba[1] = 0.0F;
+ b->verts[1].rgba[2] = 0.0F;
+ b->verts[1].rgba[3] = 0.0F;
+ gl2psListAdd(list, &b);
+ }
+ }
+
+}
+
+static void gl2psBuildPolygonBoundary(GL2PSbsptree *tree)
+{
+ GLint i;
+ GL2PSprimitive *prim;
+
+ if(!tree) return;
+ gl2psBuildPolygonBoundary(tree->back);
+ for(i = 0; i < gl2psListNbr(tree->primitives); i++){
+ prim = *(GL2PSprimitive**)gl2psListPointer(tree->primitives, i);
+ if(prim->boundary) gl2psAddBoundaryInList(prim, tree->primitives);
+ }
+ gl2psBuildPolygonBoundary(tree->front);
+}
+
+/*********************************************************************
+ *
+ * Feedback buffer parser
+ *
+ *********************************************************************/
+
+static void gl2psAddPolyPrimitive(GLshort type, GLshort numverts,
+ GL2PSvertex *verts, GLint offset,
+ GLushort pattern, GLint factor,
+ GLfloat width, char boundary)
+{
+ GL2PSprimitive *prim;
+
+ prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
+ prim->type = type;
+ prim->numverts = numverts;
+ prim->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex));
+ memcpy(prim->verts, verts, numverts * sizeof(GL2PSvertex));
+ prim->boundary = boundary;
+ prim->offset = offset;
+ prim->pattern = pattern;
+ prim->factor = factor;
+ prim->width = width;
+ prim->culled = 0;
+
+ /* FIXME: here we should have an option to split stretched
+ tris/quads to enhance SIMPLE_SORT */
+
+ gl2psListAdd(gl2ps->primitives, &prim);
+}
+
+static GLint gl2psGetVertex(GL2PSvertex *v, GLfloat *p)
+{
+ GLint i;
+
+ v->xyz[0] = p[0];
+ v->xyz[1] = p[1];
+ v->xyz[2] = p[2];
+
+ if(gl2ps->colormode == GL_COLOR_INDEX && gl2ps->colorsize > 0){
+ i = (GLint)(p[3] + 0.5);
+ v->rgba[0] = gl2ps->colormap[i][0];
+ v->rgba[1] = gl2ps->colormap[i][1];
+ v->rgba[2] = gl2ps->colormap[i][2];
+ v->rgba[3] = gl2ps->colormap[i][3];
+ return 4;
+ }
+ else{
+ v->rgba[0] = p[3];
+ v->rgba[1] = p[4];
+ v->rgba[2] = p[5];
+ v->rgba[3] = p[6];
+ return 7;
+ }
+}
+
+static void gl2psParseFeedbackBuffer(GLint used)
+{
+ char flag;
+ GLushort pattern = 0;
+ GLboolean boundary;
+ GLint i, sizeoffloat, count, v, vtot, offset = 0, factor = 0, auxindex = 0;
+ GLfloat lwidth = 1.0F, psize = 1.0F;
+ GLfloat *current;
+ GL2PSvertex vertices[3];
+ GL2PSprimitive *prim;
+ GL2PSimagemap *node;
+
+ current = gl2ps->feedback;
+ boundary = gl2ps->boundary = GL_FALSE;
+
+ while(used > 0){
+
+ if(GL_TRUE == boundary) gl2ps->boundary = GL_TRUE;
+
+ switch((GLint)*current){
+ case GL_POINT_TOKEN :
+ current ++;
+ used --;
+ i = gl2psGetVertex(&vertices[0], current);
+ current += i;
+ used -= i;
+ gl2psAddPolyPrimitive(GL2PS_POINT, 1, vertices, 0,
+ pattern, factor, psize, 0);
+ break;
+ case GL_LINE_TOKEN :
+ case GL_LINE_RESET_TOKEN :
+ current ++;
+ used --;
+ i = gl2psGetVertex(&vertices[0], current);
+ current += i;
+ used -= i;
+ i = gl2psGetVertex(&vertices[1], current);
+ current += i;
+ used -= i;
+ gl2psAddPolyPrimitive(GL2PS_LINE, 2, vertices, 0,
+ pattern, factor, lwidth, 0);
+ break;
+ case GL_POLYGON_TOKEN :
+ count = (GLint)current[1];
+ current += 2;
+ used -= 2;
+ v = vtot = 0;
+ while(count > 0 && used > 0){
+ i = gl2psGetVertex(&vertices[v], current);
+ gl2psAdaptVertexForBlending(&vertices[v]);
+ current += i;
+ used -= i;
+ count --;
+ vtot++;
+ if(v == 2){
+ if(GL_TRUE == boundary){
+ if(!count && vtot == 2) flag = 1|2|4;
+ else if(!count) flag = 2|4;
+ else if(vtot == 2) flag = 1|2;
+ else flag = 2;
+ }
+ else
+ flag = 0;
+ gl2psAddPolyPrimitive(GL2PS_TRIANGLE, 3, vertices, offset,
+ pattern, factor, 1, flag);
+ vertices[1] = vertices[2];
+ }
+ else
+ v ++;
+ }
+ break;
+ case GL_BITMAP_TOKEN :
+ case GL_DRAW_PIXEL_TOKEN :
+ case GL_COPY_PIXEL_TOKEN :
+ current ++;
+ used --;
+ i = gl2psGetVertex(&vertices[0], current);
+ current += i;
+ used -= i;
+ break;
+ case GL_PASS_THROUGH_TOKEN :
+ switch((GLint)current[1]){
+ case GL2PS_BEGIN_OFFSET_TOKEN : offset = 1; break;
+ case GL2PS_END_OFFSET_TOKEN : offset = 0; break;
+ case GL2PS_BEGIN_BOUNDARY_TOKEN : boundary = GL_TRUE; break;
+ case GL2PS_END_BOUNDARY_TOKEN : boundary = GL_FALSE; break;
+ case GL2PS_END_STIPPLE_TOKEN : pattern = factor = 0; break;
+ case GL2PS_BEGIN_BLEND_TOKEN : gl2ps->blending = GL_TRUE; break;
+ case GL2PS_END_BLEND_TOKEN : gl2ps->blending = GL_FALSE; break;
+ case GL2PS_BEGIN_STIPPLE_TOKEN :
+ current += 2;
+ used -= 2;
+ pattern = (GLushort)current[1];
+ current += 2;
+ used -= 2;
+ factor = (GLint)current[1];
+ break;
+ case GL2PS_SRC_BLEND_TOKEN :
+ current += 2;
+ used -= 2;
+ gl2ps->blendfunc[0] = (GLint)current[1];
+ break;
+ case GL2PS_DST_BLEND_TOKEN :
+ current += 2;
+ used -= 2;
+ gl2ps->blendfunc[1] = (GLint)current[1];
+ break;
+ case GL2PS_POINT_SIZE_TOKEN :
+ current += 2;
+ used -= 2;
+ psize = current[1];
+ break;
+ case GL2PS_LINE_WIDTH_TOKEN :
+ current += 2;
+ used -= 2;
+ lwidth = current[1];
+ break;
+ case GL2PS_IMAGEMAP_TOKEN :
+ prim = (GL2PSprimitive *)gl2psMalloc(sizeof(GL2PSprimitive));
+ prim->type = GL2PS_IMAGEMAP;
+ prim->boundary = 0;
+ prim->numverts = 4;
+ prim->verts = (GL2PSvertex *)gl2psMalloc(4 * sizeof(GL2PSvertex));
+ prim->culled = 0;
+ prim->offset = 0;
+ prim->pattern = 0;
+ prim->factor = 0;
+ prim->width = 1;
+
+ node = (GL2PSimagemap*)gl2psMalloc(sizeof(GL2PSimagemap));
+ node->image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage));
+ node->image->type = 0;
+ node->image->format = 0;
+ node->next = NULL;
+
+ if(gl2ps->imagemap_head == NULL)
+ gl2ps->imagemap_head = node;
+ else
+ gl2ps->imagemap_tail->next = node;
+ gl2ps->imagemap_tail = node;
+ prim->data.image = node->image;
+
+ current += 2; used -= 2;
+ i = gl2psGetVertex(&prim->verts[0], ¤t[1]);
+ current += i; used -= i;
+
+ node->image->width = (GLint)current[2];
+ current += 2; used -= 2;
+ node->image->height = (GLint)current[2];
+ prim->verts[0].xyz[0] = prim->verts[0].xyz[0] - (int)(node->image->width / 2) + 0.5;
+ prim->verts[0].xyz[1] = prim->verts[0].xyz[1] - (int)(node->image->height / 2) + 0.5;
+ for(i = 1; i < 4; i++){
+ for(v = 0; v < 3; v++){
+ prim->verts[i].xyz[v] = prim->verts[0].xyz[v];
+ prim->verts[i].rgba[v] = prim->verts[0].rgba[v];
+ }
+ prim->verts[i].rgba[v] = prim->verts[0].rgba[v];
+ }
+ prim->verts[1].xyz[0] = prim->verts[1].xyz[0] + node->image->width;
+ prim->verts[2].xyz[0] = prim->verts[1].xyz[0];
+ prim->verts[2].xyz[1] = prim->verts[2].xyz[1] + node->image->height;
+ prim->verts[3].xyz[1] = prim->verts[2].xyz[1];
+
+ sizeoffloat = sizeof(GLfloat);
+ v = 2 * sizeoffloat;
+ vtot = node->image->height + node->image->height *
+ ((node->image->width-1)/8);
+ node->image->pixels = (GLfloat*)gl2psMalloc(v + vtot);
+ node->image->pixels[0] = prim->verts[0].xyz[0];
+ node->image->pixels[1] = prim->verts[0].xyz[1];
+
+ for(i = 0; i < vtot; i += sizeoffloat){
+ current += 2; used -= 2;
+ if((vtot - i) >= 4)
+ memcpy(&(((char*)(node->image->pixels))[i + v]), &(current[2]), sizeoffloat);
+ else
+ memcpy(&(((char*)(node->image->pixels))[i + v]), &(current[2]), vtot - i);
+ }
+ current++; used--;
+ gl2psListAdd(gl2ps->primitives, &prim);
+ break;
+ case GL2PS_DRAW_PIXELS_TOKEN :
+ case GL2PS_TEXT_TOKEN :
+ if(auxindex < gl2psListNbr(gl2ps->auxprimitives))
+ gl2psListAdd(gl2ps->primitives,
+ gl2psListPointer(gl2ps->auxprimitives, auxindex++));
+ else
+ gl2psMsg(GL2PS_ERROR, "Wrong number of auxiliary tokens in buffer");
+ break;
+ }
+ current += 2;
+ used -= 2;
+ break;
+ default :
+ gl2psMsg(GL2PS_WARNING, "Unknown token in buffer");
+ current ++;
+ used --;
+ break;
+ }
+ }
+
+ gl2psListReset(gl2ps->auxprimitives);
+}
+
+/*********************************************************************
+ *
+ * PostScript routines
+ *
+ *********************************************************************/
+
+static void gl2psWriteByte(unsigned char byte)
+{
+ unsigned char h = byte / 16;
+ unsigned char l = byte % 16;
+ gl2psPrintf("%x%x", h, l);
+}
+
+static void gl2psPrintPostScriptPixmap(GLfloat x, GLfloat y, GL2PSimage *im)
+{
+ GLuint nbhex, nbyte, nrgb, nbits;
+ GLuint row, col, ibyte, icase;
+ GLfloat dr, dg, db, fgrey;
+ unsigned char red = 0, green = 0, blue = 0, b, grey;
+ GLuint width = (GLuint)im->width;
+ GLuint height = (GLuint)im->height;
+
+ /* FIXME: should we define an option for these? Or just keep the
+ 8-bit per component case? */
+ int greyscale = 0; /* set to 1 to output greyscale image */
+ int nbit = 8; /* number of bits per color compoment (2, 4 or 8) */
+
+ if((width <= 0) || (height <= 0)) return;
+
+ gl2psPrintf("gsave\n");
+ gl2psPrintf("%.2f %.2f translate\n", x, y);
+ gl2psPrintf("%d %d scale\n", width, height);
+
+ if(greyscale){ /* greyscale */
+ gl2psPrintf("/picstr %d string def\n", width);
+ gl2psPrintf("%d %d %d\n", width, height, 8);
+ gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height);
+ gl2psPrintf("{ currentfile picstr readhexstring pop }\n");
+ gl2psPrintf("image\n");
+ for(row = 0; row < height; row++){
+ for(col = 0; col < width; col++){
+ gl2psGetRGB(im, col, row, &dr, &dg, &db);
+ fgrey = (0.30 * dr + 0.59 * dg + 0.11 * db);
+ grey = (unsigned char)(255. * fgrey);
+ gl2psWriteByte(grey);
+ }
+ gl2psPrintf("\n");
+ }
+ nbhex = width * height * 2;
+ gl2psPrintf("%%%% nbhex digit :%d\n", nbhex);
+ }
+ else if(nbit == 2){ /* color, 2 bits for r and g and b; rgbs following each other */
+ nrgb = width * 3;
+ nbits = nrgb * nbit;
+ nbyte = nbits/8;
+ if((nbyte * 8) != nbits) nbyte++;
+ gl2psPrintf("/rgbstr %d string def\n", nbyte);
+ gl2psPrintf("%d %d %d\n", width, height, nbit);
+ gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height);
+ gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n");
+ gl2psPrintf("false 3\n");
+ gl2psPrintf("colorimage\n");
+ for(row = 0; row < height; row++){
+ icase = 1;
+ col = 0;
+ b = 0;
+ for(ibyte = 0; ibyte < nbyte; ibyte++){
+ if(icase == 1) {
+ if(col < width) {
+ gl2psGetRGB(im, col, row, &dr, &dg, &db);
+ }
+ else {
+ dr = dg = db = 0;
+ }
+ col++;
+ red = (unsigned char)(3. * dr);
+ green = (unsigned char)(3. * dg);
+ blue = (unsigned char)(3. * db);
+ b = red;
+ b = (b<<2) + green;
+ b = (b<<2) + blue;
+ if(col < width) {
+ gl2psGetRGB(im, col, row, &dr, &dg, &db);
+ }
+ else {
+ dr = dg = db = 0;
+ }
+ col++;
+ red = (unsigned char)(3. * dr);
+ green = (unsigned char)(3. * dg);
+ blue = (unsigned char)(3. * db);
+ b = (b<<2) + red;
+ gl2psWriteByte(b);
+ b = 0;
+ icase++;
+ }
+ else if(icase == 2) {
+ b = green;
+ b = (b<<2) + blue;
+ if(col < width) {
+ gl2psGetRGB(im, col, row, &dr, &dg, &db);
+ }
+ else {
+ dr = dg = db = 0;
+ }
+ col++;
+ red = (unsigned char)(3. * dr);
+ green = (unsigned char)(3. * dg);
+ blue = (unsigned char)(3. * db);
+ b = (b<<2) + red;
+ b = (b<<2) + green;
+ gl2psWriteByte(b);
+ b = 0;
+ icase++;
+ }
+ else if(icase == 3) {
+ b = blue;
+ if(col < width) {
+ gl2psGetRGB(im, col, row, &dr, &dg, &db);
+ }
+ else {
+ dr = dg = db = 0;
+ }
+ col++;
+ red = (unsigned char)(3. * dr);
+ green = (unsigned char)(3. * dg);
+ blue = (unsigned char)(3. * db);
+ b = (b<<2) + red;
+ b = (b<<2) + green;
+ b = (b<<2) + blue;
+ gl2psWriteByte(b);
+ b = 0;
+ icase = 1;
+ }
+ }
+ gl2psPrintf("\n");
+ }
+ }
+ else if(nbit == 4){ /* color, 4 bits for r and g and b; rgbs following each other */
+ nrgb = width * 3;
+ nbits = nrgb * nbit;
+ nbyte = nbits/8;
+ if((nbyte * 8) != nbits) nbyte++;
+ gl2psPrintf("/rgbstr %d string def\n", nbyte);
+ gl2psPrintf("%d %d %d\n", width, height, nbit);
+ gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height);
+ gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n");
+ gl2psPrintf("false 3\n");
+ gl2psPrintf("colorimage\n");
+ for(row = 0; row < height; row++){
+ col = 0;
+ icase = 1;
+ for(ibyte = 0; ibyte < nbyte; ibyte++){
+ if(icase == 1) {
+ if(col < width) {
+ gl2psGetRGB(im, col, row, &dr, &dg, &db);
+ }
+ else {
+ dr = dg = db = 0;
+ }
+ col++;
+ red = (unsigned char)(15. * dr);
+ green = (unsigned char)(15. * dg);
+ gl2psPrintf("%x%x", red, green);
+ icase++;
+ }
+ else if(icase == 2) {
+ blue = (unsigned char)(15. * db);
+ if(col < width) {
+ gl2psGetRGB(im, col, row, &dr, &dg, &db);
+ }
+ else {
+ dr = dg = db = 0;
+ }
+ col++;
+ red = (unsigned char)(15. * dr);
+ gl2psPrintf("%x%x", blue, red);
+ icase++;
+ }
+ else if(icase == 3) {
+ green = (unsigned char)(15. * dg);
+ blue = (unsigned char)(15. * db);
+ gl2psPrintf("%x%x", green, blue);
+ icase = 1;
+ }
+ }
+ gl2psPrintf("\n");
+ }
+ }
+ else{ /* 8 bit for r and g and b */
+ nbyte = width * 3;
+ gl2psPrintf("/rgbstr %d string def\n", nbyte);
+ gl2psPrintf("%d %d %d\n", width, height, 8);
+ gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height);
+ gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n");
+ gl2psPrintf("false 3\n");
+ gl2psPrintf("colorimage\n");
+ for(row = 0; row < height; row++){
+ for(col = 0; col < width; col++){
+ gl2psGetRGB(im, col, row, &dr, &dg, &db);
+ red = (unsigned char)(255. * dr);
+ gl2psWriteByte(red);
+ green = (unsigned char)(255. * dg);
+ gl2psWriteByte(green);
+ blue = (unsigned char)(255. * db);
+ gl2psWriteByte(blue);
+ }
+ gl2psPrintf("\n");
+ }
+ }
+
+ gl2psPrintf("grestore\n");
+}
+
+static void gl2psPrintPostScriptImagemap(GLfloat x, GLfloat y,
+ GLsizei width, GLsizei height,
+ const unsigned char *imagemap){
+ int i, size;
+
+ if((width <= 0) || (height <= 0)) return;
+
+ size = height + height * (width-1)/8;
+
+ gl2psPrintf("gsave\n");
+ gl2psPrintf("%.2f %.2f translate\n", x, y);
+ gl2psPrintf("%d %d scale\n%d %d\ntrue\n", width, height,width, height);
+ gl2psPrintf("[ %d 0 0 -%d 0 %d ] {<", width, height);
+ for(i = 0; i < size; i++){
+ gl2psWriteByte(*imagemap);
+ imagemap++;
+ }
+ gl2psPrintf(">} imagemask\ngrestore\n");
+}
+
+static void gl2psPrintPostScriptHeader(void)
+{
+ time_t now;
+
+ /* Since compression is not part of the PostScript standard,
+ compressed PostScript files are just gzipped PostScript files
+ ("ps.gz" or "eps.gz") */
+ gl2psPrintGzipHeader();
+
+ time(&now);
+
+ if(gl2ps->format == GL2PS_PS){
+ gl2psPrintf("%%!PS-Adobe-3.0\n");
+ }
+ else{
+ gl2psPrintf("%%!PS-Adobe-3.0 EPSF-3.0\n");
+ }
+
+ gl2psPrintf("%%%%Title: %s\n"
+ "%%%%Creator: GL2PS %d.%d.%d%s, %s\n"
+ "%%%%For: %s\n"
+ "%%%%CreationDate: %s"
+ "%%%%LanguageLevel: 3\n"
+ "%%%%DocumentData: Clean7Bit\n"
+ "%%%%Pages: 1\n",
+ gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION,
+ GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT,
+ gl2ps->producer, ctime(&now));
+
+ if(gl2ps->format == GL2PS_PS){
+ gl2psPrintf("%%%%Orientation: %s\n"
+ "%%%%DocumentMedia: Default %d %d 0 () ()\n",
+ (gl2ps->options & GL2PS_LANDSCAPE) ? "Landscape" : "Portrait",
+ (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[3] :
+ (int)gl2ps->viewport[2],
+ (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[2] :
+ (int)gl2ps->viewport[3]);
+ }
+
+ gl2psPrintf("%%%%BoundingBox: %d %d %d %d\n"
+ "%%%%EndComments\n",
+ (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[1] :
+ (int)gl2ps->viewport[0],
+ (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[0] :
+ (int)gl2ps->viewport[1],
+ (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[3] :
+ (int)gl2ps->viewport[2],
+ (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[2] :
+ (int)gl2ps->viewport[3]);
+
+ /* RGB color: r g b C (replace C by G in output to change from rgb to gray)
+ Grayscale: r g b G
+ Font choose: size fontname FC
+ Text string: (string) x y size fontname S??
+ Rotated text string: (string) angle x y size fontname S??R
+ Point primitive: x y size P
+ Line width: width W
+ Line start: x y LS
+ Line joining last point: x y L
+ Line end: x y LE
+ Flat-shaded triangle: x3 y3 x2 y2 x1 y1 T
+ Smooth-shaded triangle: x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 ST */
+
+ gl2psPrintf("%%%%BeginProlog\n"
+ "/gl2psdict 64 dict def gl2psdict begin\n"
+ "0 setlinecap 0 setlinejoin\n"
+ "/tryPS3shading %s def %% set to false to force subdivision\n"
+ "/rThreshold %g def %% red component subdivision threshold\n"
+ "/gThreshold %g def %% green component subdivision threshold\n"
+ "/bThreshold %g def %% blue component subdivision threshold\n",
+ (gl2ps->options & GL2PS_NO_PS3_SHADING) ? "false" : "true",
+ gl2ps->threshold[0], gl2ps->threshold[1], gl2ps->threshold[2]);
+
+ gl2psPrintf("/BD { bind def } bind def\n"
+ "/C { setrgbcolor } BD\n"
+ "/G { 0.082 mul exch 0.6094 mul add exch 0.3086 mul add neg 1.0 add setgray } BD\n"
+ "/W { setlinewidth } BD\n");
+
+ gl2psPrintf("/FC { findfont exch /SH exch def SH scalefont setfont } BD\n"
+ "/SW { dup stringwidth pop } BD\n"
+ "/S { FC moveto show } BD\n"
+ "/SBC{ FC moveto SW -2 div 0 rmoveto show } BD\n"
+ "/SBR{ FC moveto SW neg 0 rmoveto show } BD\n"
+ "/SCL{ FC moveto 0 SH -2 div rmoveto show } BD\n"
+ "/SCC{ FC moveto SW -2 div SH -2 div rmoveto show } BD\n"
+ "/SCR{ FC moveto SW neg SH -2 div rmoveto show } BD\n"
+ "/STL{ FC moveto 0 SH neg rmoveto show } BD\n"
+ "/STC{ FC moveto SW -2 div SH neg rmoveto show } BD\n"
+ "/STR{ FC moveto SW neg SH neg rmoveto show } BD\n");
+
+ /* rotated text routines: same nameanem with R appended */
+
+ gl2psPrintf("/FCT { FC translate 0 0 } BD\n"
+ "/SR { gsave FCT moveto rotate show grestore } BD\n"
+ "/SBCR{ gsave FCT moveto rotate SW -2 div 0 rmoveto show grestore } BD\n"
+ "/SBRR{ gsave FCT moveto rotate SW neg 0 rmoveto show grestore } BD\n"
+ "/SCLR{ gsave FCT moveto rotate 0 SH -2 div rmoveto show grestore} BD\n");
+ gl2psPrintf("/SCCR{ gsave FCT moveto rotate SW -2 div SH -2 div rmoveto show grestore} BD\n"
+ "/SCRR{ gsave FCT moveto rotate SW neg SH -2 div rmoveto show grestore} BD\n"
+ "/STLR{ gsave FCT moveto rotate 0 SH neg rmoveto show grestore } BD\n"
+ "/STCR{ gsave FCT moveto rotate SW -2 div SH neg rmoveto show grestore } BD\n"
+ "/STRR{ gsave FCT moveto rotate SW neg SH neg rmoveto show grestore } BD\n");
+
+ gl2psPrintf("/P { newpath 0.0 360.0 arc closepath fill } BD\n"
+ "/LS { newpath moveto } BD\n"
+ "/L { lineto } BD\n"
+ "/LE { lineto stroke } BD\n"
+ "/T { newpath moveto lineto lineto closepath fill } BD\n");
+
+ /* Smooth-shaded triangle with PostScript level 3 shfill operator:
+ x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STshfill */
+
+ gl2psPrintf("/STshfill {\n"
+ " /b1 exch def /g1 exch def /r1 exch def /y1 exch def /x1 exch def\n"
+ " /b2 exch def /g2 exch def /r2 exch def /y2 exch def /x2 exch def\n"
+ " /b3 exch def /g3 exch def /r3 exch def /y3 exch def /x3 exch def\n"
+ " gsave << /ShadingType 4 /ColorSpace [/DeviceRGB]\n"
+ " /DataSource [ 0 x1 y1 r1 g1 b1 0 x2 y2 r2 g2 b2 0 x3 y3 r3 g3 b3 ] >>\n"
+ " shfill grestore } BD\n");
+
+ /* Flat-shaded triangle with middle color:
+ x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 Tm */
+
+ gl2psPrintf(/* stack : x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 */
+ "/Tm { 3 -1 roll 8 -1 roll 13 -1 roll add add 3 div\n" /* r = (r1+r2+r3)/3 */
+ /* stack : x3 y3 g3 b3 x2 y2 g2 b2 x1 y1 g1 b1 r */
+ " 3 -1 roll 7 -1 roll 11 -1 roll add add 3 div\n" /* g = (g1+g2+g3)/3 */
+ /* stack : x3 y3 b3 x2 y2 b2 x1 y1 b1 r g b */
+ " 3 -1 roll 6 -1 roll 9 -1 roll add add 3 div" /* b = (b1+b2+b3)/3 */
+ /* stack : x3 y3 x2 y2 x1 y1 r g b */
+ " C T } BD\n");
+
+ /* Split triangle in four sub-triangles (at sides middle points) and call the
+ STnoshfill procedure on each, interpolating the colors in RGB space:
+ x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STsplit
+ (in procedure comments key: (Vi) = xi yi ri gi bi) */
+
+ gl2psPrintf("/STsplit {\n"
+ " 4 index 15 index add 0.5 mul\n" /* x13 = (x1+x3)/2 */
+ " 4 index 15 index add 0.5 mul\n" /* y13 = (y1+y3)/2 */
+ " 4 index 15 index add 0.5 mul\n" /* r13 = (r1+r3)/2 */
+ " 4 index 15 index add 0.5 mul\n" /* g13 = (g1+g3)/2 */
+ " 4 index 15 index add 0.5 mul\n" /* b13 = (b1+b3)/2 */
+ " 5 copy 5 copy 25 15 roll\n");
+
+ /* at his point, stack = (V3) (V13) (V13) (V13) (V2) (V1) */
+
+ gl2psPrintf(" 9 index 30 index add 0.5 mul\n" /* x23 = (x2+x3)/2 */
+ " 9 index 30 index add 0.5 mul\n" /* y23 = (y2+y3)/2 */
+ " 9 index 30 index add 0.5 mul\n" /* r23 = (r2+r3)/2 */
+ " 9 index 30 index add 0.5 mul\n" /* g23 = (g2+g3)/2 */
+ " 9 index 30 index add 0.5 mul\n" /* b23 = (b2+b3)/2 */
+ " 5 copy 5 copy 35 5 roll 25 5 roll 15 5 roll\n");
+
+ /* stack = (V3) (V13) (V23) (V13) (V23) (V13) (V23) (V2) (V1) */
+
+ gl2psPrintf(" 4 index 10 index add 0.5 mul\n" /* x12 = (x1+x2)/2 */
+ " 4 index 10 index add 0.5 mul\n" /* y12 = (y1+y2)/2 */
+ " 4 index 10 index add 0.5 mul\n" /* r12 = (r1+r2)/2 */
+ " 4 index 10 index add 0.5 mul\n" /* g12 = (g1+g2)/2 */
+ " 4 index 10 index add 0.5 mul\n" /* b12 = (b1+b2)/2 */
+ " 5 copy 5 copy 40 5 roll 25 5 roll 15 5 roll 25 5 roll\n");
+
+ /* stack = (V3) (V13) (V23) (V13) (V12) (V23) (V13) (V1) (V12) (V23) (V12) (V2) */
+
+ gl2psPrintf(" STnoshfill STnoshfill STnoshfill STnoshfill } BD\n");
+
+ /* Gouraud shaded triangle using recursive subdivision until the difference
+ between corner colors does not exceed the thresholds:
+ x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STnoshfill */
+
+ gl2psPrintf("/STnoshfill {\n"
+ " 2 index 8 index sub abs rThreshold gt\n" /* |r1-r2|>rth */
+ " { STsplit }\n"
+ " { 1 index 7 index sub abs gThreshold gt\n" /* |g1-g2|>gth */
+ " { STsplit }\n"
+ " { dup 6 index sub abs bThreshold gt\n" /* |b1-b2|>bth */
+ " { STsplit }\n"
+ " { 2 index 13 index sub abs rThreshold gt\n" /* |r1-r3|>rht */
+ " { STsplit }\n"
+ " { 1 index 12 index sub abs gThreshold gt\n" /* |g1-g3|>gth */
+ " { STsplit }\n"
+ " { dup 11 index sub abs bThreshold gt\n" /* |b1-b3|>bth */
+ " { STsplit }\n"
+ " { 7 index 13 index sub abs rThreshold gt\n"); /* |r2-r3|>rht */
+ gl2psPrintf(" { STsplit }\n"
+ " { 6 index 12 index sub abs gThreshold gt\n" /* |g2-g3|>gth */
+ " { STsplit }\n"
+ " { 5 index 11 index sub abs bThreshold gt\n" /* |b2-b3|>bth */
+ " { STsplit }\n"
+ " { Tm }\n" /* all colors sufficiently similar */
+ " ifelse }\n"
+ " ifelse }\n"
+ " ifelse }\n"
+ " ifelse }\n"
+ " ifelse }\n"
+ " ifelse }\n"
+ " ifelse }\n"
+ " ifelse }\n"
+ " ifelse } BD\n");
+
+ gl2psPrintf("tryPS3shading\n"
+ "{ /shfill where\n"
+ " { /ST { STshfill } BD }\n"
+ " { /ST { STnoshfill } BD }\n"
+ " ifelse }\n"
+ "{ /ST { STnoshfill } BD }\n"
+ "ifelse\n");
+
+ gl2psPrintf("end\n"
+ "%%%%EndProlog\n"
+ "%%%%BeginSetup\n"
+ "/DeviceRGB setcolorspace\n"
+ "gl2psdict begin\n"
+ "%%%%EndSetup\n"
+ "%%%%Page: 1 1\n"
+ "%%%%BeginPageSetup\n");
+
+ if(gl2ps->options & GL2PS_LANDSCAPE){
+ gl2psPrintf("%d 0 translate 90 rotate\n",
+ (int)gl2ps->viewport[3]);
+ }
+
+ gl2psPrintf("%%%%EndPageSetup\n"
+ "mark\n"
+ "gsave\n"
+ "1.0 1.0 scale\n");
+
+ if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
+ gl2psPrintf("%g %g %g C\n"
+ "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n"
+ "closepath fill\n",
+ gl2ps->bgcolor[0], gl2ps->bgcolor[1], gl2ps->bgcolor[2],
+ (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], (int)gl2ps->viewport[2],
+ (int)gl2ps->viewport[1], (int)gl2ps->viewport[2], (int)gl2ps->viewport[3],
+ (int)gl2ps->viewport[0], (int)gl2ps->viewport[3]);
+ }
+}
+
+static void gl2psPrintPostScriptColor(GL2PSrgba rgba)
+{
+ if(!gl2psSameColor(gl2ps->lastrgba, rgba)){
+ gl2psSetLastColor(rgba);
+ gl2psPrintf("%g %g %g C\n", rgba[0], rgba[1], rgba[2]);
+ }
+}
+
+static void gl2psResetPostScriptColor(void)
+{
+ gl2ps->lastrgba[0] = gl2ps->lastrgba[1] = gl2ps->lastrgba[2] = -1.;
+}
+
+static void gl2psEndPostScriptLine(void)
+{
+ int i;
+ if(gl2ps->lastvertex.rgba[0] >= 0.){
+ gl2psPrintf("%g %g LE\n", gl2ps->lastvertex.xyz[0], gl2ps->lastvertex.xyz[1]);
+ for(i = 0; i < 3; i++)
+ gl2ps->lastvertex.xyz[i] = -1.;
+ for(i = 0; i < 4; i++)
+ gl2ps->lastvertex.rgba[i] = -1.;
+ }
+}
+
+static void gl2psParseStipplePattern(GLushort pattern, GLint factor,
+ int *nb, int array[10])
+{
+ int i, n;
+ int on[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+ int off[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+ char tmp[16];
+
+ /* extract the 16 bits from the OpenGL stipple pattern */
+ for(n = 15; n >= 0; n--){
+ tmp[n] = (char)(pattern & 0x01);
+ pattern >>= 1;
+ }
+ /* compute the on/off pixel sequence */
+ n = 0;
+ for(i = 0; i < 8; i++){
+ while(n < 16 && !tmp[n]){ off[i]++; n++; }
+ while(n < 16 && tmp[n]){ on[i]++; n++; }
+ if(n >= 15){ i++; break; }
+ }
+
+ /* store the on/off array from right to left, starting with off
+ pixels. The PostScript specification allows for at most 11
+ elements in the on/off array, so we limit ourselves to 5 on/off
+ couples (our longest possible array is thus [on4 off4 on3 off3
+ on2 off2 on1 off1 on0 off0]) */
+ *nb = 0;
+ for(n = i - 1; n >= 0; n--){
+ array[(*nb)++] = factor * on[n];
+ array[(*nb)++] = factor * off[n];
+ if(*nb == 10) break;
+ }
+}
+
+static int gl2psPrintPostScriptDash(GLushort pattern, GLint factor, char *str)
+{
+ int len = 0, i, n, array[10];
+
+ if(pattern == gl2ps->lastpattern && factor == gl2ps->lastfactor)
+ return 0;
+
+ gl2ps->lastpattern = pattern;
+ gl2ps->lastfactor = factor;
+
+ if(!pattern || !factor){
+ /* solid line */
+ len += gl2psPrintf("[] 0 %s\n", str);
+ }
+ else{
+ gl2psParseStipplePattern(pattern, factor, &n, array);
+ len += gl2psPrintf("[");
+ for(i = 0; i < n; i++){
+ if(i) len += gl2psPrintf(" ");
+ len += gl2psPrintf("%d", array[i]);
+ }
+ len += gl2psPrintf("] 0 %s\n", str);
+ }
+
+ return len;
+}
+
+static void gl2psPrintPostScriptPrimitive(void *data)
+{
+ int newline;
+ GL2PSprimitive *prim;
+
+ prim = *(GL2PSprimitive**)data;
+
+ if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled) return;
+
+ /* Every effort is made to draw lines as connected segments (i.e.,
+ using a single PostScript path): this is the only way to get nice
+ line joins and to not restart the stippling for every line
+ segment. So if the primitive to print is not a line we must first
+ finish the current line (if any): */
+ if(prim->type != GL2PS_LINE) gl2psEndPostScriptLine();
+
+ switch(prim->type){
+ case GL2PS_POINT :
+ gl2psPrintPostScriptColor(prim->verts[0].rgba);
+ gl2psPrintf("%g %g %g P\n",
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1], 0.5 * prim->width);
+ break;
+ case GL2PS_LINE :
+ if(!gl2psSamePosition(gl2ps->lastvertex.xyz, prim->verts[0].xyz) ||
+ !gl2psSameColor(gl2ps->lastrgba, prim->verts[0].rgba) ||
+ gl2ps->lastlinewidth != prim->width ||
+ gl2ps->lastpattern != prim->pattern ||
+ gl2ps->lastfactor != prim->factor){
+ /* End the current line if the new segment does not start where
+ the last one ended, or if the color, the width or the
+ stippling have changed (multi-stroking lines with changing
+ colors is necessary until we use /shfill for lines;
+ unfortunately this means that at the moment we can screw up
+ line stippling for smooth-shaded lines) */
+ gl2psEndPostScriptLine();
+ newline = 1;
+ }
+ else{
+ newline = 0;
+ }
+ if(gl2ps->lastlinewidth != prim->width){
+ gl2ps->lastlinewidth = prim->width;
+ gl2psPrintf("%g W\n", gl2ps->lastlinewidth);
+ }
+ gl2psPrintPostScriptDash(prim->pattern, prim->factor, "setdash");
+ gl2psPrintPostScriptColor(prim->verts[0].rgba);
+ gl2psPrintf("%g %g %s\n", prim->verts[0].xyz[0], prim->verts[0].xyz[1],
+ newline ? "LS" : "L");
+ gl2ps->lastvertex = prim->verts[1];
+ break;
+ case GL2PS_TRIANGLE :
+ if(!gl2psVertsSameColor(prim)){
+ gl2psResetPostScriptColor();
+ gl2psPrintf("%g %g %g %g %g %g %g %g %g %g %g %g %g %g %g ST\n",
+ prim->verts[2].xyz[0], prim->verts[2].xyz[1],
+ prim->verts[2].rgba[0], prim->verts[2].rgba[1],
+ prim->verts[2].rgba[2], prim->verts[1].xyz[0],
+ prim->verts[1].xyz[1], prim->verts[1].rgba[0],
+ prim->verts[1].rgba[1], prim->verts[1].rgba[2],
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1],
+ prim->verts[0].rgba[0], prim->verts[0].rgba[1],
+ prim->verts[0].rgba[2]);
+ }
+ else{
+ gl2psPrintPostScriptColor(prim->verts[0].rgba);
+ gl2psPrintf("%g %g %g %g %g %g T\n",
+ prim->verts[2].xyz[0], prim->verts[2].xyz[1],
+ prim->verts[1].xyz[0], prim->verts[1].xyz[1],
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
+ }
+ break;
+ case GL2PS_QUADRANGLE :
+ gl2psMsg(GL2PS_WARNING, "There should not be any quad left to print");
+ break;
+ case GL2PS_PIXMAP :
+ gl2psPrintPostScriptPixmap(prim->verts[0].xyz[0], prim->verts[0].xyz[1],
+ prim->data.image);
+ break;
+ case GL2PS_IMAGEMAP :
+ if(prim->data.image->type != GL2PS_IMAGEMAP_WRITTEN){
+ gl2psPrintPostScriptColor(prim->verts[0].rgba);
+ gl2psPrintPostScriptImagemap(prim->data.image->pixels[0],
+ prim->data.image->pixels[1],
+ prim->data.image->width, prim->data.image->height,
+ (const unsigned char*)(&(prim->data.image->pixels[2])));
+ prim->data.image->type = GL2PS_IMAGEMAP_WRITTEN;
+ }
+ break;
+ case GL2PS_TEXT :
+ gl2psPrintPostScriptColor(prim->verts[0].rgba);
+ gl2psPrintf("(%s) ", prim->data.text->str);
+ if(prim->data.text->angle)
+ gl2psPrintf("%g ", prim->data.text->angle);
+ gl2psPrintf("%g %g %d /%s ",
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1],
+ prim->data.text->fontsize, prim->data.text->fontname);
+ switch(prim->data.text->alignment){
+ case GL2PS_TEXT_C:
+ gl2psPrintf(prim->data.text->angle ? "SCCR\n" : "SCC\n");
+ break;
+ case GL2PS_TEXT_CL:
+ gl2psPrintf(prim->data.text->angle ? "SCLR\n" : "SCL\n");
+ break;
+ case GL2PS_TEXT_CR:
+ gl2psPrintf(prim->data.text->angle ? "SCRR\n" : "SCR\n");
+ break;
+ case GL2PS_TEXT_B:
+ gl2psPrintf(prim->data.text->angle ? "SBCR\n" : "SBC\n");
+ break;
+ case GL2PS_TEXT_BR:
+ gl2psPrintf(prim->data.text->angle ? "SBRR\n" : "SBR\n");
+ break;
+ case GL2PS_TEXT_T:
+ gl2psPrintf(prim->data.text->angle ? "STCR\n" : "STC\n");
+ break;
+ case GL2PS_TEXT_TL:
+ gl2psPrintf(prim->data.text->angle ? "STLR\n" : "STL\n");
+ break;
+ case GL2PS_TEXT_TR:
+ gl2psPrintf(prim->data.text->angle ? "STRR\n" : "STR\n");
+ break;
+ case GL2PS_TEXT_BL:
+ default:
+ gl2psPrintf(prim->data.text->angle ? "SR\n" : "S\n");
+ break;
+ }
+ break;
+ case GL2PS_SPECIAL :
+ /* alignment contains the format for which the special output text
+ is intended */
+ if(prim->data.text->alignment == GL2PS_PS ||
+ prim->data.text->alignment == GL2PS_EPS)
+ gl2psPrintf("%s\n", prim->data.text->str);
+ break;
+ default :
+ break;
+ }
+}
+
+static void gl2psPrintPostScriptFooter(void)
+{
+ gl2psPrintf("grestore\n"
+ "showpage\n"
+ "cleartomark\n"
+ "%%%%PageTrailer\n"
+ "%%%%Trailer\n"
+ "end\n"
+ "%%%%EOF\n");
+
+ gl2psPrintGzipFooter();
+}
+
+static void gl2psPrintPostScriptBeginViewport(GLint viewport[4])
+{
+ GLint index;
+ GLfloat rgba[4];
+ int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3];
+
+ glRenderMode(GL_FEEDBACK);
+
+ if(gl2ps->header){
+ gl2psPrintPostScriptHeader();
+ gl2ps->header = GL_FALSE;
+ }
+
+ gl2psPrintf("gsave\n"
+ "1.0 1.0 scale\n");
+
+ if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
+ if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){
+ glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba);
+ }
+ else{
+ glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index);
+ rgba[0] = gl2ps->colormap[index][0];
+ rgba[1] = gl2ps->colormap[index][1];
+ rgba[2] = gl2ps->colormap[index][2];
+ rgba[3] = 1.0F;
+ }
+ gl2psPrintf("%g %g %g C\n"
+ "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n"
+ "closepath fill\n",
+ rgba[0], rgba[1], rgba[2],
+ x, y, x+w, y, x+w, y+h, x, y+h);
+ }
+
+ gl2psPrintf("newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n"
+ "closepath clip\n",
+ x, y, x+w, y, x+w, y+h, x, y+h);
+
+}
+
+static GLint gl2psPrintPostScriptEndViewport(void)
+{
+ GLint res;
+
+ res = gl2psPrintPrimitives();
+ gl2psPrintf("grestore\n");
+ return res;
+}
+
+static void gl2psPrintPostScriptFinalPrimitive(void)
+{
+ /* End any remaining line, if any */
+ gl2psEndPostScriptLine();
+}
+
+/* definition of the PostScript and Encapsulated PostScript backends */
+
+static GL2PSbackend gl2psPS = {
+ gl2psPrintPostScriptHeader,
+ gl2psPrintPostScriptFooter,
+ gl2psPrintPostScriptBeginViewport,
+ gl2psPrintPostScriptEndViewport,
+ gl2psPrintPostScriptPrimitive,
+ gl2psPrintPostScriptFinalPrimitive,
+ "ps",
+ "Postscript"
+};
+
+static GL2PSbackend gl2psEPS = {
+ gl2psPrintPostScriptHeader,
+ gl2psPrintPostScriptFooter,
+ gl2psPrintPostScriptBeginViewport,
+ gl2psPrintPostScriptEndViewport,
+ gl2psPrintPostScriptPrimitive,
+ gl2psPrintPostScriptFinalPrimitive,
+ "eps",
+ "Encapsulated Postscript"
+};
+
+/*********************************************************************
+ *
+ * LaTeX routines
+ *
+ *********************************************************************/
+
+static void gl2psPrintTeXHeader(void)
+{
+ char name[256];
+ time_t now;
+ int i;
+
+ if(gl2ps->filename && strlen(gl2ps->filename) < 256){
+ for(i = strlen(gl2ps->filename)-1; i >= 0; i--){
+ if(gl2ps->filename[i] == '.'){
+ strncpy(name, gl2ps->filename, i);
+ name[i] = '\0';
+ break;
+ }
+ }
+ if(i <= 0) strcpy(name, gl2ps->filename);
+ }
+ else{
+ strcpy(name, "untitled");
+ }
+
+ time(&now);
+
+ fprintf(gl2ps->stream,
+ "%% Title: %s\n"
+ "%% Creator: GL2PS %d.%d.%d%s, %s\n"
+ "%% For: %s\n"
+ "%% CreationDate: %s",
+ gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION,
+ GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT,
+ gl2ps->producer, ctime(&now));
+
+ fprintf(gl2ps->stream,
+ "\\setlength{\\unitlength}{1pt}\n"
+ "\\begin{picture}(0,0)\n"
+ "\\includegraphics{%s}\n"
+ "\\end{picture}%%\n"
+ "%s\\begin{picture}(%d,%d)(0,0)\n",
+ name, (gl2ps->options & GL2PS_LANDSCAPE) ? "\\rotatebox{90}{" : "",
+ (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]);
+}
+
+static void gl2psPrintTeXPrimitive(void *data)
+{
+ GL2PSprimitive *prim;
+
+ prim = *(GL2PSprimitive**)data;
+
+ switch(prim->type){
+ case GL2PS_TEXT :
+ fprintf(gl2ps->stream, "\\fontsize{%d}{0}\n\\selectfont",
+ prim->data.text->fontsize);
+ fprintf(gl2ps->stream, "\\put(%g,%g){\\makebox(0,0)",
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
+ switch(prim->data.text->alignment){
+ case GL2PS_TEXT_C:
+ fprintf(gl2ps->stream, "{");
+ break;
+ case GL2PS_TEXT_CL:
+ fprintf(gl2ps->stream, "[l]{");
+ break;
+ case GL2PS_TEXT_CR:
+ fprintf(gl2ps->stream, "[r]{");
+ break;
+ case GL2PS_TEXT_B:
+ fprintf(gl2ps->stream, "[b]{");
+ break;
+ case GL2PS_TEXT_BR:
+ fprintf(gl2ps->stream, "[br]{");
+ break;
+ case GL2PS_TEXT_T:
+ fprintf(gl2ps->stream, "[t]{");
+ break;
+ case GL2PS_TEXT_TL:
+ fprintf(gl2ps->stream, "[tl]{");
+ break;
+ case GL2PS_TEXT_TR:
+ fprintf(gl2ps->stream, "[tr]{");
+ break;
+ case GL2PS_TEXT_BL:
+ default:
+ fprintf(gl2ps->stream, "[bl]{");
+ break;
+ }
+ if(prim->data.text->angle)
+ fprintf(gl2ps->stream, "\\rotatebox{%g}{", prim->data.text->angle);
+ fprintf(gl2ps->stream, "\\textcolor[rgb]{%g,%g,%g}{{%s}}",
+ prim->verts[0].rgba[0], prim->verts[0].rgba[1], prim->verts[0].rgba[2],
+ prim->data.text->str);
+ if(prim->data.text->angle)
+ fprintf(gl2ps->stream, "}");
+ fprintf(gl2ps->stream, "}}\n");
+ break;
+ case GL2PS_SPECIAL :
+ /* alignment contains the format for which the special output text
+ is intended */
+ if (prim->data.text->alignment == GL2PS_TEX)
+ fprintf(gl2ps->stream, "%s\n", prim->data.text->str);
+ break;
+ default :
+ break;
+ }
+}
+
+static void gl2psPrintTeXFooter(void)
+{
+ fprintf(gl2ps->stream, "\\end{picture}%s\n",
+ (gl2ps->options & GL2PS_LANDSCAPE) ? "}" : "");
+}
+
+static void gl2psPrintTeXBeginViewport(GLint viewport[4])
+{
+ glRenderMode(GL_FEEDBACK);
+
+ if(gl2ps->header){
+ gl2psPrintTeXHeader();
+ gl2ps->header = GL_FALSE;
+ }
+}
+
+static GLint gl2psPrintTeXEndViewport(void)
+{
+ return gl2psPrintPrimitives();
+}
+
+static void gl2psPrintTeXFinalPrimitive(void)
+{
+}
+
+/* definition of the LaTeX backend */
+
+static GL2PSbackend gl2psTEX = {
+ gl2psPrintTeXHeader,
+ gl2psPrintTeXFooter,
+ gl2psPrintTeXBeginViewport,
+ gl2psPrintTeXEndViewport,
+ gl2psPrintTeXPrimitive,
+ gl2psPrintTeXFinalPrimitive,
+ "tex",
+ "LaTeX text"
+};
+
+/*********************************************************************
+ *
+ * PDF routines
+ *
+ *********************************************************************/
+
+static int gl2psPrintPDFCompressorType(void)
+{
+#if defined(GL2PS_HAVE_ZLIB)
+ if(gl2ps->options & GL2PS_COMPRESS){
+ return fprintf(gl2ps->stream, "/Filter [/FlateDecode]\n");
+ }
+#endif
+ return 0;
+}
+
+static int gl2psPrintPDFStrokeColor(GL2PSrgba rgba)
+{
+ int i, offs = 0;
+
+ gl2psSetLastColor(rgba);
+ for(i = 0; i < 3; ++i){
+ if(GL2PS_ZERO(rgba[i]))
+ offs += gl2psPrintf("%.0f ", 0.);
+ else if(rgba[i] < 1e-4 || rgba[i] > 1e6) /* avoid %e formatting */
+ offs += gl2psPrintf("%f ", rgba[i]);
+ else
+ offs += gl2psPrintf("%g ", rgba[i]);
+ }
+ offs += gl2psPrintf("RG\n");
+ return offs;
+}
+
+static int gl2psPrintPDFFillColor(GL2PSrgba rgba)
+{
+ int i, offs = 0;
+
+ for(i = 0; i < 3; ++i){
+ if(GL2PS_ZERO(rgba[i]))
+ offs += gl2psPrintf("%.0f ", 0.);
+ else if(rgba[i] < 1e-4 || rgba[i] > 1e6) /* avoid %e formatting */
+ offs += gl2psPrintf("%f ", rgba[i]);
+ else
+ offs += gl2psPrintf("%g ", rgba[i]);
+ }
+ offs += gl2psPrintf("rg\n");
+ return offs;
+}
+
+static int gl2psPrintPDFLineWidth(GLfloat lw)
+{
+ if(GL2PS_ZERO(lw))
+ return gl2psPrintf("%.0f w\n", 0.);
+ else if(lw < 1e-4 || lw > 1e6) /* avoid %e formatting */
+ return gl2psPrintf("%f w\n", lw);
+ else
+ return gl2psPrintf("%g w\n", lw);
+}
+
+static void gl2psPutPDFText(GL2PSstring *text, int cnt, GLfloat x, GLfloat y)
+{
+ gl2ps->streamlength +=
+ gl2psPrintf("BT\n"
+ "/F%d %d Tf\n"
+ "%f %f Td\n"
+ "(%s) Tj\n"
+ "ET\n",
+ cnt, text->fontsize, x, y, text->str);
+}
+
+static void gl2psPutPDFImage(GL2PSimage *image, int cnt, GLfloat x, GLfloat y)
+{
+ gl2ps->streamlength +=
+ gl2psPrintf("q\n"
+ "%d 0 0 %d %f %f cm\n"
+ "/Im%d Do\n"
+ "Q\n",
+ (int)image->width, (int)image->height, x, y, cnt);
+}
+
+static void gl2psPDFstacksInit(void)
+{
+ gl2ps->objects_stack = 7 /* FIXED_XREF_ENTRIES */ + 1;
+ gl2ps->extgs_stack = 0;
+ gl2ps->font_stack = 0;
+ gl2ps->im_stack = 0;
+ gl2ps->trgroupobjects_stack = 0;
+ gl2ps->shader_stack = 0;
+ gl2ps->mshader_stack = 0;
+}
+
+static void gl2psPDFgroupObjectInit(GL2PSpdfgroup *gro)
+{
+ if(!gro)
+ return;
+
+ gro->ptrlist = NULL;
+ gro->fontno = gro->gsno = gro->imno = gro->maskshno = gro->shno
+ = gro->trgroupno = gro->fontobjno = gro->imobjno = gro->shobjno
+ = gro->maskshobjno = gro->gsobjno = gro->trgroupobjno = -1;
+}
+
+/* Build up group objects and assign name and object numbers */
+
+static void gl2psPDFgroupListInit(void)
+{
+ int i;
+ GL2PSprimitive *p = NULL;
+ GL2PSpdfgroup gro;
+ int lasttype = GL2PS_NO_TYPE;
+ GL2PSrgba lastrgba = {-1.0F, -1.0F, -1.0F, -1.0F};
+ GLushort lastpattern = 0;
+ GLint lastfactor = 0;
+ GLfloat lastwidth = 1;
+ GL2PStriangle lastt, tmpt;
+ int lastTriangleWasNotSimpleWithSameColor = 0;
+
+ if(!gl2ps->pdfprimlist)
+ return;
+
+ gl2ps->pdfgrouplist = gl2psListCreate(500, 500, sizeof(GL2PSpdfgroup));
+ gl2psInitTriangle(&lastt);
+
+ for(i = 0; i < gl2psListNbr(gl2ps->pdfprimlist); ++i){
+ p = *(GL2PSprimitive**)gl2psListPointer(gl2ps->pdfprimlist, i);
+ switch(p->type){
+ case GL2PS_PIXMAP:
+ gl2psPDFgroupObjectInit(&gro);
+ gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
+ gro.imno = gl2ps->im_stack++;
+ gl2psListAdd(gro.ptrlist, &p);
+ gl2psListAdd(gl2ps->pdfgrouplist, &gro);
+ break;
+ case GL2PS_TEXT:
+ gl2psPDFgroupObjectInit(&gro);
+ gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
+ gro.fontno = gl2ps->font_stack++;
+ gl2psListAdd(gro.ptrlist, &p);
+ gl2psListAdd(gl2ps->pdfgrouplist, &gro);
+ break;
+ case GL2PS_LINE:
+ if(lasttype != p->type || lastwidth != p->width ||
+ lastpattern != p->pattern || lastfactor != p->factor ||
+ !gl2psSameColor(p->verts[0].rgba, lastrgba)){
+ gl2psPDFgroupObjectInit(&gro);
+ gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
+ gl2psListAdd(gro.ptrlist, &p);
+ gl2psListAdd(gl2ps->pdfgrouplist, &gro);
+ }
+ else{
+ gl2psListAdd(gro.ptrlist, &p);
+ }
+ lastpattern = p->pattern;
+ lastfactor = p->factor;
+ lastwidth = p->width;
+ lastrgba[0] = p->verts[0].rgba[0];
+ lastrgba[1] = p->verts[0].rgba[1];
+ lastrgba[2] = p->verts[0].rgba[2];
+ break;
+ case GL2PS_POINT:
+ if(lasttype != p->type || lastwidth != p->width ||
+ !gl2psSameColor(p->verts[0].rgba, lastrgba)){
+ gl2psPDFgroupObjectInit(&gro);
+ gro.ptrlist = gl2psListCreate(1,2,sizeof(GL2PSprimitive*));
+ gl2psListAdd(gro.ptrlist, &p);
+ gl2psListAdd(gl2ps->pdfgrouplist, &gro);
+ }
+ else{
+ gl2psListAdd(gro.ptrlist, &p);
+ }
+ lastwidth = p->width;
+ lastrgba[0] = p->verts[0].rgba[0];
+ lastrgba[1] = p->verts[0].rgba[1];
+ lastrgba[2] = p->verts[0].rgba[2];
+ break;
+ case GL2PS_TRIANGLE:
+ gl2psFillTriangleFromPrimitive(&tmpt, p, GL_TRUE);
+ lastTriangleWasNotSimpleWithSameColor =
+ !(tmpt.prop & T_CONST_COLOR && tmpt.prop & T_ALPHA_1) ||
+ !gl2psSameColor(tmpt.vertex[0].rgba, lastt.vertex[0].rgba);
+ if(lasttype == p->type && tmpt.prop == lastt.prop &&
+ lastTriangleWasNotSimpleWithSameColor){
+ /* TODO Check here for last alpha */
+ gl2psListAdd(gro.ptrlist, &p);
+ }
+ else{
+ gl2psPDFgroupObjectInit(&gro);
+ gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
+ gl2psListAdd(gro.ptrlist, &p);
+ gl2psListAdd(gl2ps->pdfgrouplist, &gro);
+ }
+ lastt = tmpt;
+ break;
+ default:
+ break;
+ }
+ lasttype = p->type;
+ }
+}
+
+static void gl2psSortOutTrianglePDFgroup(GL2PSpdfgroup *gro)
+{
+ GL2PStriangle t;
+ GL2PSprimitive *prim = NULL;
+
+ if(!gro)
+ return;
+
+ if(!gl2psListNbr(gro->ptrlist))
+ return;
+
+ prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0);
+
+ if(prim->type != GL2PS_TRIANGLE)
+ return;
+
+ gl2psFillTriangleFromPrimitive(&t, prim, GL_TRUE);
+
+ if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_LESS_1){
+ gro->gsno = gl2ps->extgs_stack++;
+ gro->gsobjno = gl2ps->objects_stack ++;
+ }
+ else if(t.prop & T_CONST_COLOR && t.prop & T_VAR_ALPHA){
+ gro->gsno = gl2ps->extgs_stack++;
+ gro->gsobjno = gl2ps->objects_stack++;
+ gro->trgroupno = gl2ps->trgroupobjects_stack++;
+ gro->trgroupobjno = gl2ps->objects_stack++;
+ gro->maskshno = gl2ps->mshader_stack++;
+ gro->maskshobjno = gl2ps->objects_stack++;
+ }
+ else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_1){
+ gro->shno = gl2ps->shader_stack++;
+ gro->shobjno = gl2ps->objects_stack++;
+ }
+ else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_LESS_1){
+ gro->gsno = gl2ps->extgs_stack++;
+ gro->gsobjno = gl2ps->objects_stack++;
+ gro->shno = gl2ps->shader_stack++;
+ gro->shobjno = gl2ps->objects_stack++;
+ }
+ else if(t.prop & T_VAR_COLOR && t.prop & T_VAR_ALPHA){
+ gro->gsno = gl2ps->extgs_stack++;
+ gro->gsobjno = gl2ps->objects_stack++;
+ gro->shno = gl2ps->shader_stack++;
+ gro->shobjno = gl2ps->objects_stack++;
+ gro->trgroupno = gl2ps->trgroupobjects_stack++;
+ gro->trgroupobjno = gl2ps->objects_stack++;
+ gro->maskshno = gl2ps->mshader_stack++;
+ gro->maskshobjno = gl2ps->objects_stack++;
+ }
+}
+
+/* Main stream data */
+
+static void gl2psPDFgroupListWriteMainStream(void)
+{
+ int i, j, lastel;
+ GL2PSprimitive *prim = NULL, *prev = NULL;
+ GL2PSpdfgroup *gro;
+ GL2PStriangle t;
+
+ if(!gl2ps->pdfgrouplist)
+ return;
+
+ for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
+ gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
+
+ lastel = gl2psListNbr(gro->ptrlist) - 1;
+ if(lastel < 0)
+ continue;
+
+ prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0);
+
+ switch(prim->type){
+ case GL2PS_POINT:
+ gl2ps->streamlength += gl2psPrintf("1 J\n");
+ gl2ps->streamlength += gl2psPrintPDFLineWidth(prim->width);
+ gl2ps->streamlength += gl2psPrintPDFStrokeColor(prim->verts[0].rgba);
+ for(j = 0; j <= lastel; ++j){
+ prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
+ gl2ps->streamlength +=
+ gl2psPrintf("%f %f m %f %f l\n",
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1],
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
+ }
+ gl2ps->streamlength += gl2psPrintf("S\n");
+ gl2ps->streamlength += gl2psPrintf("0 J\n");
+ break;
+ case GL2PS_LINE:
+ /* We try to use as few paths as possible to draw lines, in
+ order to get nice stippling even when the individual segments
+ are smaller than the stipple */
+ gl2ps->streamlength += gl2psPrintPDFLineWidth(prim->width);
+ gl2ps->streamlength += gl2psPrintPDFStrokeColor(prim->verts[0].rgba);
+ gl2ps->streamlength += gl2psPrintPostScriptDash(prim->pattern, prim->factor, "d");
+ /* start new path */
+ gl2ps->streamlength +=
+ gl2psPrintf("%f %f m\n",
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
+
+ for(j = 1; j <= lastel; ++j){
+ prev = prim;
+ prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
+ if(!gl2psSamePosition(prim->verts[0].xyz, prev->verts[1].xyz)){
+ /* the starting point of the new segment does not match the
+ end point of the previous line, so we end the current
+ path and start a new one */
+ gl2ps->streamlength +=
+ gl2psPrintf("%f %f l\n",
+ prev->verts[1].xyz[0], prev->verts[1].xyz[1]);
+ gl2ps->streamlength +=
+ gl2psPrintf("%f %f m\n",
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
+ }
+ else{
+ /* the two segements are connected, so we just append to the
+ current path */
+ gl2ps->streamlength +=
+ gl2psPrintf("%f %f l\n",
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
+ }
+ }
+ /* end last path */
+ gl2ps->streamlength +=
+ gl2psPrintf("%f %f l\n",
+ prim->verts[1].xyz[0], prim->verts[1].xyz[1]);
+ gl2ps->streamlength += gl2psPrintf("S\n");
+ break;
+ case GL2PS_TRIANGLE:
+ gl2psFillTriangleFromPrimitive(&t, prim, GL_TRUE);
+ gl2psSortOutTrianglePDFgroup(gro);
+
+ /* No alpha and const color: Simple PDF draw orders */
+ if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_1){
+ gl2ps->streamlength += gl2psPrintPDFFillColor(t.vertex[0].rgba);
+ for(j = 0; j <= lastel; ++j){
+ prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
+ gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE);
+ gl2ps->streamlength
+ += gl2psPrintf("%f %f m\n"
+ "%f %f l\n"
+ "%f %f l\n"
+ "h f\n",
+ t.vertex[0].xyz[0], t.vertex[0].xyz[1],
+ t.vertex[1].xyz[0], t.vertex[1].xyz[1],
+ t.vertex[2].xyz[0], t.vertex[2].xyz[1]);
+ }
+ }
+ /* Const alpha < 1 and const color: Simple PDF draw orders
+ and an extra extended Graphics State for the alpha const */
+ else if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_LESS_1){
+ gl2ps->streamlength += gl2psPrintf("q\n"
+ "/GS%d gs\n",
+ gro->gsno);
+ gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba);
+ for(j = 0; j <= lastel; ++j){
+ prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
+ gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE);
+ gl2ps->streamlength
+ += gl2psPrintf("%f %f m\n"
+ "%f %f l\n"
+ "%f %f l\n"
+ "h f\n",
+ t.vertex[0].xyz[0], t.vertex[0].xyz[1],
+ t.vertex[1].xyz[0], t.vertex[1].xyz[1],
+ t.vertex[2].xyz[0], t.vertex[2].xyz[1]);
+ }
+ gl2ps->streamlength += gl2psPrintf("Q\n");
+ }
+ /* Variable alpha and const color: Simple PDF draw orders
+ and an extra extended Graphics State + Xobject + Shader
+ object for the alpha mask */
+ else if(t.prop & T_CONST_COLOR && t.prop & T_VAR_ALPHA){
+ gl2ps->streamlength += gl2psPrintf("q\n"
+ "/GS%d gs\n"
+ "/TrG%d Do\n",
+ gro->gsno, gro->trgroupno);
+ gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba);
+ for(j = 0; j <= lastel; ++j){
+ prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
+ gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE);
+ gl2ps->streamlength
+ += gl2psPrintf("%f %f m\n"
+ "%f %f l\n"
+ "%f %f l\n"
+ "h f\n",
+ t.vertex[0].xyz[0], t.vertex[0].xyz[1],
+ t.vertex[1].xyz[0], t.vertex[1].xyz[1],
+ t.vertex[2].xyz[0], t.vertex[2].xyz[1]);
+ }
+ gl2ps->streamlength += gl2psPrintf("Q\n");
+ }
+ /* Variable color and no alpha: Shader Object for the colored
+ triangle(s) */
+ else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_1){
+ gl2ps->streamlength += gl2psPrintf("/Sh%d sh\n", gro->shno);
+ }
+ /* Variable color and const alpha < 1: Shader Object for the
+ colored triangle(s) and an extra extended Graphics State
+ for the alpha const */
+ else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_LESS_1){
+ gl2ps->streamlength += gl2psPrintf("q\n"
+ "/GS%d gs\n"
+ "/Sh%d sh\n"
+ "Q\n",
+ gro->gsno, gro->shno);
+ }
+ /* Variable alpha and color: Shader Object for the colored
+ triangle(s) and an extra extended Graphics State
+ + Xobject + Shader object for the alpha mask */
+ else if(t.prop & T_VAR_COLOR && t.prop & T_VAR_ALPHA){
+ gl2ps->streamlength += gl2psPrintf("q\n"
+ "/GS%d gs\n"
+ "/TrG%d Do\n"
+ "/Sh%d sh\n"
+ "Q\n",
+ gro->gsno, gro->trgroupno, gro->shno);
+ }
+ break;
+ case GL2PS_PIXMAP:
+ for(j = 0; j <= lastel; ++j){
+ prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
+ gl2psPutPDFImage(prim->data.image, gro->imno, prim->verts[0].xyz[0],
+ prim->verts[0].xyz[1]);
+ }
+ break;
+ case GL2PS_TEXT:
+ for(j = 0; j <= lastel; ++j){
+ prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
+ gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba);
+ gl2psPutPDFText(prim->data.text, gro->fontno, prim->verts[0].xyz[0],
+ prim->verts[0].xyz[1]);
+ }
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+/* Graphics State names */
+
+static int gl2psPDFgroupListWriteGStateResources(void)
+{
+ GL2PSpdfgroup *gro;
+ int offs = 0;
+ int i;
+
+ offs += fprintf(gl2ps->stream,
+ "/ExtGState\n"
+ "<<\n"
+ "/GSa 7 0 R\n");
+ for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
+ gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
+ if(gro->gsno >= 0)
+ offs += fprintf(gl2ps->stream, "/GS%d %d 0 R\n", gro->gsno, gro->gsobjno);
+ }
+ offs += fprintf(gl2ps->stream, ">>\n");
+ return offs;
+}
+
+/* Main Shader names */
+
+static int gl2psPDFgroupListWriteShaderResources(void)
+{
+ GL2PSpdfgroup *gro;
+ int offs = 0;
+ int i;
+
+ offs += fprintf(gl2ps->stream,
+ "/Shading\n"
+ "<<\n");
+ for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
+ gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
+ if(gro->shno >= 0)
+ offs += fprintf(gl2ps->stream, "/Sh%d %d 0 R\n", gro->shno, gro->shobjno);
+ if(gro->maskshno >= 0)
+ offs += fprintf(gl2ps->stream, "/TrSh%d %d 0 R\n", gro->maskshno, gro->maskshobjno);
+ }
+ offs += fprintf(gl2ps->stream,">>\n");
+ return offs;
+}
+
+/* Images & Mask Shader XObject names */
+
+static int gl2psPDFgroupListWriteXObjectResources(void)
+{
+ int i;
+ GL2PSprimitive *p = NULL;
+ GL2PSpdfgroup *gro;
+ int offs = 0;
+
+ offs += fprintf(gl2ps->stream,
+ "/XObject\n"
+ "<<\n");
+
+ for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
+ gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
+ if(!gl2psListNbr(gro->ptrlist))
+ continue;
+ p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0);
+ switch(p->type){
+ case GL2PS_PIXMAP:
+ gro->imobjno = gl2ps->objects_stack++;
+ if(GL_RGBA == p->data.image->format) /* reserve one object for image mask */
+ gl2ps->objects_stack++;
+ offs += fprintf(gl2ps->stream, "/Im%d %d 0 R\n", gro->imno, gro->imobjno);
+ case GL2PS_TRIANGLE:
+ if(gro->trgroupno >=0)
+ offs += fprintf(gl2ps->stream, "/TrG%d %d 0 R\n", gro->trgroupno, gro->trgroupobjno);
+ break;
+ default:
+ break;
+ }
+ }
+ offs += fprintf(gl2ps->stream,">>\n");
+ return offs;
+}
+
+/* Font names */
+
+static int gl2psPDFgroupListWriteFontResources(void)
+{
+ int i;
+ GL2PSpdfgroup *gro;
+ int offs = 0;
+
+ offs += fprintf(gl2ps->stream, "/Font\n<<\n");
+
+ for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
+ gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
+ if(gro->fontno < 0)
+ continue;
+ gro->fontobjno = gl2ps->objects_stack++;
+ offs += fprintf(gl2ps->stream, "/F%d %d 0 R\n", gro->fontno, gro->fontobjno);
+ }
+ offs += fprintf(gl2ps->stream, ">>\n");
+
+ return offs;
+}
+
+static void gl2psPDFgroupListDelete(void)
+{
+ int i;
+ GL2PSpdfgroup *gro = NULL;
+
+ if(!gl2ps->pdfgrouplist)
+ return;
+
+ for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
+ gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist,i);
+ gl2psListDelete(gro->ptrlist);
+ }
+
+ gl2psListDelete(gl2ps->pdfgrouplist);
+ gl2ps->pdfgrouplist = NULL;
+}
+
+/* Print 1st PDF object - file info */
+
+static int gl2psPrintPDFInfo(void)
+{
+ int offs;
+ time_t now;
+ struct tm *newtime;
+
+ time(&now);
+ newtime = gmtime(&now);
+
+ offs = fprintf(gl2ps->stream,
+ "1 0 obj\n"
+ "<<\n"
+ "/Title (%s)\n"
+ "/Creator (GL2PS %d.%d.%d%s, %s)\n"
+ "/Producer (%s)\n",
+ gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION,
+ GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT,
+ gl2ps->producer);
+
+ if(!newtime){
+ offs += fprintf(gl2ps->stream,
+ ">>\n"
+ "endobj\n");
+ return offs;
+ }
+
+ offs += fprintf(gl2ps->stream,
+ "/CreationDate (D:%d%02d%02d%02d%02d%02d)\n"
+ ">>\n"
+ "endobj\n",
+ newtime->tm_year+1900,
+ newtime->tm_mon+1,
+ newtime->tm_mday,
+ newtime->tm_hour,
+ newtime->tm_min,
+ newtime->tm_sec);
+ return offs;
+}
+
+/* Create catalog and page structure - 2nd and 3th PDF object */
+
+static int gl2psPrintPDFCatalog(void)
+{
+ return fprintf(gl2ps->stream,
+ "2 0 obj\n"
+ "<<\n"
+ "/Type /Catalog\n"
+ "/Pages 3 0 R\n"
+ ">>\n"
+ "endobj\n");
+}
+
+static int gl2psPrintPDFPages(void)
+{
+ return fprintf(gl2ps->stream,
+ "3 0 obj\n"
+ "<<\n"
+ "/Type /Pages\n"
+ "/Kids [6 0 R]\n"
+ "/Count 1\n"
+ ">>\n"
+ "endobj\n");
+}
+
+/* Open stream for data - graphical objects, fonts etc. PDF object 4 */
+
+static int gl2psOpenPDFDataStream(void)
+{
+ int offs = 0;
+
+ offs += fprintf(gl2ps->stream,
+ "4 0 obj\n"
+ "<<\n"
+ "/Length 5 0 R\n" );
+ offs += gl2psPrintPDFCompressorType();
+ offs += fprintf(gl2ps->stream,
+ ">>\n"
+ "stream\n");
+ return offs;
+}
+
+/* Stream setup - Graphics state, fill background if allowed */
+
+static int gl2psOpenPDFDataStreamWritePreface(void)
+{
+ int offs;
+
+ offs = gl2psPrintf("/GSa gs\n");
+
+ if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
+ offs += gl2psPrintPDFFillColor(gl2ps->bgcolor);
+ offs += gl2psPrintf("%d %d %d %d re\n",
+ (int)gl2ps->viewport[0], (int)gl2ps->viewport[1],
+ (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]);
+ offs += gl2psPrintf("f\n");
+ }
+ return offs;
+}
+
+/* Use the functions above to create the first part of the PDF*/
+
+static void gl2psPrintPDFHeader(void)
+{
+ int offs = 0;
+ gl2ps->pdfprimlist = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*));
+ gl2psPDFstacksInit();
+
+ gl2ps->xreflist = (int*)gl2psMalloc(sizeof(int) * gl2ps->objects_stack);
+
+#if defined(GL2PS_HAVE_ZLIB)
+ if(gl2ps->options & GL2PS_COMPRESS){
+ gl2psSetupCompress();
+ }
+#endif
+ gl2ps->xreflist[0] = 0;
+ offs += fprintf(gl2ps->stream, "%%PDF-1.4\n");
+ gl2ps->xreflist[1] = offs;
+
+ offs += gl2psPrintPDFInfo();
+ gl2ps->xreflist[2] = offs;
+
+ offs += gl2psPrintPDFCatalog();
+ gl2ps->xreflist[3] = offs;
+
+ offs += gl2psPrintPDFPages();
+ gl2ps->xreflist[4] = offs;
+
+ offs += gl2psOpenPDFDataStream();
+ gl2ps->xreflist[5] = offs; /* finished in gl2psPrintPDFFooter */
+ gl2ps->streamlength = gl2psOpenPDFDataStreamWritePreface();
+}
+
+/* The central primitive drawing */
+
+static void gl2psPrintPDFPrimitive(void *data)
+{
+ GL2PSprimitive *prim = *(GL2PSprimitive**)data;
+
+ if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled)
+ return;
+
+ prim = gl2psCopyPrimitive(prim); /* deep copy */
+ gl2psListAdd(gl2ps->pdfprimlist, &prim);
+}
+
+/* close stream and ... */
+
+static int gl2psClosePDFDataStream(void)
+{
+ int offs = 0;
+
+#if defined(GL2PS_HAVE_ZLIB)
+ if(gl2ps->options & GL2PS_COMPRESS){
+ if(Z_OK != gl2psDeflate())
+ gl2psMsg(GL2PS_ERROR, "Zlib deflate error");
+ else
+ fwrite(gl2ps->compress->dest, gl2ps->compress->destLen, 1, gl2ps->stream);
+ gl2ps->streamlength += gl2ps->compress->destLen;
+
+ offs += gl2ps->streamlength;
+ gl2psFreeCompress();
+ }
+#endif
+
+ offs += fprintf(gl2ps->stream,
+ "endstream\n"
+ "endobj\n");
+ return offs;
+}
+
+/* ... write the now known length object */
+
+static int gl2psPrintPDFDataStreamLength(int val)
+{
+ return fprintf(gl2ps->stream,
+ "5 0 obj\n"
+ "%d\n"
+ "endobj\n", val);
+}
+
+/* Put the info created before in PDF objects */
+
+static int gl2psPrintPDFOpenPage(void)
+{
+ int offs;
+
+ /* Write fixed part */
+
+ offs = fprintf(gl2ps->stream,
+ "6 0 obj\n"
+ "<<\n"
+ "/Type /Page\n"
+ "/Parent 3 0 R\n"
+ "/MediaBox [%d %d %d %d]\n",
+ (int)gl2ps->viewport[0], (int)gl2ps->viewport[1],
+ (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]);
+
+ if(gl2ps->options & GL2PS_LANDSCAPE)
+ offs += fprintf(gl2ps->stream, "/Rotate -90\n");
+
+ offs += fprintf(gl2ps->stream,
+ "/Contents 4 0 R\n"
+ "/Resources\n"
+ "<<\n"
+ "/ProcSet [/PDF /Text /ImageB /ImageC] %%/ImageI\n");
+
+ return offs;
+
+ /* End fixed part, proceeds in gl2psPDFgroupListWriteVariableResources() */
+}
+
+static int gl2psPDFgroupListWriteVariableResources(void)
+{
+ int offs = 0;
+
+ /* a) Graphics States for shader alpha masks*/
+ offs += gl2psPDFgroupListWriteGStateResources();
+
+ /* b) Shader and shader masks */
+ offs += gl2psPDFgroupListWriteShaderResources();
+
+ /* c) XObjects (Images & Shader Masks) */
+ offs += gl2psPDFgroupListWriteXObjectResources();
+
+ /* d) Fonts */
+ offs += gl2psPDFgroupListWriteFontResources();
+
+ /* End resources and page */
+ offs += fprintf(gl2ps->stream,
+ ">>\n"
+ ">>\n"
+ "endobj\n");
+ return offs;
+}
+
+/* Standard Graphics State */
+
+static int gl2psPrintPDFGSObject(void)
+{
+ return fprintf(gl2ps->stream,
+ "7 0 obj\n"
+ "<<\n"
+ "/Type /ExtGState\n"
+ "/SA false\n"
+ "/SM 0.02\n"
+ "/OP false\n"
+ "/op false\n"
+ "/OPM 0\n"
+ "/BG2 /Default\n"
+ "/UCR2 /Default\n"
+ "/TR2 /Default\n"
+ ">>\n"
+ "endobj\n");
+}
+
+/* Put vertex' edge flag (8bit) and coordinates (32bit) in shader stream */
+
+static int gl2psPrintPDFShaderStreamDataCoord(GL2PSvertex *vertex,
+ size_t (*action)(unsigned long data,
+ size_t size),
+ GLfloat dx, GLfloat dy,
+ GLfloat xmin, GLfloat ymin)
+{
+ int offs = 0;
+ unsigned long imap;
+ GLfloat diff;
+ double dmax = ~1UL;
+ char edgeflag = 0;
+
+ /* FIXME: temp bux fix for 64 bit archs: */
+ if(sizeof(unsigned long) == 8) dmax = dmax - 2048.;
+
+ offs += (*action)(edgeflag, 1);
+
+ /* The Shader stream in PDF requires to be in a 'big-endian'
+ order */
+
+ if(GL2PS_ZERO(dx*dy)){
+ offs += (*action)(0, 4);
+ offs += (*action)(0, 4);
+ }
+ else{
+ diff = (vertex->xyz[0] - xmin) / dx;
+ if(diff > 1)
+ diff = 1.0F;
+ else if(diff < 0)
+ diff = 0.0F;
+ imap = (unsigned long)(diff * dmax);
+ offs += (*action)(imap, 4);
+
+ diff = (vertex->xyz[1] - ymin) / dy;
+ if(diff > 1)
+ diff = 1.0F;
+ else if(diff < 0)
+ diff = 0.0F;
+ imap = (unsigned long)(diff * dmax);
+ offs += (*action)(imap, 4);
+ }
+
+ return offs;
+}
+
+/* Put vertex' rgb value (8bit for every component) in shader stream */
+
+static int gl2psPrintPDFShaderStreamDataRGB(GL2PSvertex *vertex,
+ size_t (*action)(unsigned long data,
+ size_t size))
+{
+ int offs = 0;
+ unsigned long imap;
+ double dmax = ~1UL;
+
+ /* FIXME: temp bux fix for 64 bit archs: */
+ if(sizeof(unsigned long) == 8) dmax = dmax - 2048.;
+
+ imap = (unsigned long)((vertex->rgba[0]) * dmax);
+ offs += (*action)(imap, 1);
+
+ imap = (unsigned long)((vertex->rgba[1]) * dmax);
+ offs += (*action)(imap, 1);
+
+ imap = (unsigned long)((vertex->rgba[2]) * dmax);
+ offs += (*action)(imap, 1);
+
+ return offs;
+}
+
+/* Put vertex' alpha (8/16bit) in shader stream */
+
+static int gl2psPrintPDFShaderStreamDataAlpha(GL2PSvertex *vertex,
+ size_t (*action)(unsigned long data,
+ size_t size),
+ int sigbyte)
+{
+ int offs = 0;
+ unsigned long imap;
+ double dmax = ~1UL;
+
+ /* FIXME: temp bux fix for 64 bit archs: */
+ if(sizeof(unsigned long) == 8) dmax = dmax - 2048.;
+
+ if(sigbyte != 8 && sigbyte != 16)
+ sigbyte = 8;
+
+ sigbyte /= 8;
+
+ imap = (unsigned long)((vertex->rgba[3]) * dmax);
+
+ offs += (*action)(imap, sigbyte);
+
+ return offs;
+}
+
+/* Put a triangles raw data in shader stream */
+
+static int gl2psPrintPDFShaderStreamData(GL2PStriangle *triangle,
+ GLfloat dx, GLfloat dy,
+ GLfloat xmin, GLfloat ymin,
+ size_t (*action)(unsigned long data,
+ size_t size),
+ int gray)
+{
+ int i, offs = 0;
+ GL2PSvertex v;
+
+ if(gray && gray != 8 && gray != 16)
+ gray = 8;
+
+ for(i = 0; i < 3; ++i){
+ offs += gl2psPrintPDFShaderStreamDataCoord(&triangle->vertex[i], action,
+ dx, dy, xmin, ymin);
+ if(gray){
+ v = triangle->vertex[i];
+ offs += gl2psPrintPDFShaderStreamDataAlpha(&v, action, gray);
+ }
+ else{
+ offs += gl2psPrintPDFShaderStreamDataRGB(&triangle->vertex[i], action);
+ }
+ }
+
+ return offs;
+}
+
+static void gl2psPDFRectHull(GLfloat *xmin, GLfloat *xmax,
+ GLfloat *ymin, GLfloat *ymax,
+ GL2PStriangle *triangles, int cnt)
+{
+ int i, j;
+
+ *xmin = triangles[0].vertex[0].xyz[0];
+ *xmax = triangles[0].vertex[0].xyz[0];
+ *ymin = triangles[0].vertex[0].xyz[1];
+ *ymax = triangles[0].vertex[0].xyz[1];
+
+ for(i = 0; i < cnt; ++i){
+ for(j = 0; j < 3; ++j){
+ if(*xmin > triangles[i].vertex[j].xyz[0])
+ *xmin = triangles[i].vertex[j].xyz[0];
+ if(*xmax < triangles[i].vertex[j].xyz[0])
+ *xmax = triangles[i].vertex[j].xyz[0];
+ if(*ymin > triangles[i].vertex[j].xyz[1])
+ *ymin = triangles[i].vertex[j].xyz[1];
+ if(*ymax < triangles[i].vertex[j].xyz[1])
+ *ymax = triangles[i].vertex[j].xyz[1];
+ }
+ }
+}
+
+/* Writes shaded triangle
+ gray == 0 means write RGB triangles
+ gray == 8 8bit-grayscale (for alpha masks)
+ gray == 16 16bit-grayscale (for alpha masks) */
+
+static int gl2psPrintPDFShader(int obj, GL2PStriangle *triangles,
+ int size, int gray)
+{
+ int i, offs = 0, vertexbytes, done = 0;
+ GLfloat xmin, xmax, ymin, ymax;
+
+ switch(gray){
+ case 0:
+ vertexbytes = 1+4+4+1+1+1;
+ break;
+ case 8:
+ vertexbytes = 1+4+4+1;
+ break;
+ case 16:
+ vertexbytes = 1+4+4+2;
+ break;
+ default:
+ gray = 8;
+ vertexbytes = 1+4+4+1;
+ break;
+ }
+
+ gl2psPDFRectHull(&xmin, &xmax, &ymin, &ymax, triangles, size);
+
+ offs += fprintf(gl2ps->stream,
+ "%d 0 obj\n"
+ "<< "
+ "/ShadingType 4 "
+ "/ColorSpace %s "
+ "/BitsPerCoordinate 32 "
+ "/BitsPerComponent %d "
+ "/BitsPerFlag 8 "
+ "/Decode [%f %f %f %f 0 1 %s] ",
+ obj,
+ (gray) ? "/DeviceGray" : "/DeviceRGB",
+ (gray) ? gray : 8,
+ xmin, xmax, ymin, ymax,
+ (gray) ? "" : "0 1 0 1");
+
+#if defined(GL2PS_HAVE_ZLIB)
+ if(gl2ps->options & GL2PS_COMPRESS){
+ gl2psAllocCompress(vertexbytes * size * 3);
+
+ for(i = 0; i < size; ++i)
+ gl2psPrintPDFShaderStreamData(&triangles[i],
+ xmax-xmin, ymax-ymin, xmin, ymin,
+ gl2psWriteBigEndianCompress, gray);
+
+ if(Z_OK == gl2psDeflate() && 23 + gl2ps->compress->destLen < gl2ps->compress->srcLen){
+ offs += gl2psPrintPDFCompressorType();
+ offs += fprintf(gl2ps->stream,
+ "/Length %d "
+ ">>\n"
+ "stream\n",
+ (int)gl2ps->compress->destLen);
+ offs += gl2ps->compress->destLen * fwrite(gl2ps->compress->dest,
+ gl2ps->compress->destLen,
+ 1, gl2ps->stream);
+ done = 1;
+ }
+ gl2psFreeCompress();
+ }
+#endif
+
+ if(!done){
+ /* no compression, or too long after compression, or compress error
+ -> write non-compressed entry */
+ offs += fprintf(gl2ps->stream,
+ "/Length %d "
+ ">>\n"
+ "stream\n",
+ vertexbytes * 3 * size);
+ for(i = 0; i < size; ++i)
+ offs += gl2psPrintPDFShaderStreamData(&triangles[i],
+ xmax-xmin, ymax-ymin, xmin, ymin,
+ gl2psWriteBigEndian, gray);
+ }
+
+ offs += fprintf(gl2ps->stream,
+ "\nendstream\n"
+ "endobj\n");
+
+ return offs;
+}
+
+/* Writes a XObject for a shaded triangle mask */
+
+static int gl2psPrintPDFShaderMask(int obj, int childobj)
+{
+ int offs = 0, len;
+
+ offs += fprintf(gl2ps->stream,
+ "%d 0 obj\n"
+ "<<\n"
+ "/Type /XObject\n"
+ "/Subtype /Form\n"
+ "/BBox [ %d %d %d %d ]\n"
+ "/Group \n<<\n/S /Transparency /CS /DeviceRGB\n"
+ ">>\n",
+ obj,
+ (int)gl2ps->viewport[0], (int)gl2ps->viewport[1],
+ (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]);
+
+ len = (childobj>0)
+ ? strlen("/TrSh sh\n") + (int)log10((double)childobj)+1
+ : strlen("/TrSh0 sh\n");
+
+ offs += fprintf(gl2ps->stream,
+ "/Length %d\n"
+ ">>\n"
+ "stream\n",
+ len);
+ offs += fprintf(gl2ps->stream,
+ "/TrSh%d sh\n",
+ childobj);
+ offs += fprintf(gl2ps->stream,
+ "endstream\n"
+ "endobj\n");
+
+ return offs;
+}
+
+/* Writes a Extended graphics state for a shaded triangle mask if
+ simplealpha ist true the childobj argument is ignored and a /ca
+ statement will be written instead */
+
+static int gl2psPrintPDFShaderExtGS(int obj, int childobj)
+{
+ int offs = 0;
+
+ offs += fprintf(gl2ps->stream,
+ "%d 0 obj\n"
+ "<<\n",
+ obj);
+
+ offs += fprintf(gl2ps->stream,
+ "/SMask << /S /Alpha /G %d 0 R >> ",
+ childobj);
+
+ offs += fprintf(gl2ps->stream,
+ ">>\n"
+ "endobj\n");
+ return offs;
+}
+
+/* a simple graphics state */
+
+static int gl2psPrintPDFShaderSimpleExtGS(int obj, GLfloat alpha)
+{
+ int offs = 0;
+
+ offs += fprintf(gl2ps->stream,
+ "%d 0 obj\n"
+ "<<\n"
+ "/ca %g"
+ ">>\n"
+ "endobj\n",
+ obj, alpha);
+ return offs;
+}
+
+/* Similar groups of functions for pixmaps and text */
+
+static int gl2psPrintPDFPixmapStreamData(GL2PSimage *im,
+ size_t (*action)(unsigned long data,
+ size_t size),
+ int gray)
+{
+ int x, y;
+ GLfloat r, g, b, a;
+
+ if(im->format != GL_RGBA && gray)
+ return 0;
+
+ if(gray && gray !=8 && gray != 16)
+ gray = 8;
+
+ gray /= 8;
+
+ for(y = 0; y < im->height; ++y){
+ for(x = 0; x < im->width; ++x){
+ a = gl2psGetRGB(im, x, y, &r, &g, &b);
+ if(im->format == GL_RGBA && gray){
+ (*action)((unsigned long)(a*255) << 24, gray);
+ }
+ else{
+ (*action)((unsigned long)(r*255) << 24, 1);
+ (*action)((unsigned long)(g*255) << 24, 1);
+ (*action)((unsigned long)(b*255) << 24, 1);
+ }
+ }
+ }
+
+ switch(gray){
+ case 0: return 3 * im->width * im->height;
+ case 1: return im->width * im->height;
+ case 2: return 2 * im->width * im->height;
+ default: return 3 * im->width * im->height;
+ }
+}
+
+static int gl2psPrintPDFPixmap(int obj, int childobj, GL2PSimage *im, int gray)
+{
+ int offs = 0, done = 0, sigbytes = 3;
+
+ if(gray && gray !=8 && gray != 16)
+ gray = 8;
+
+ if(gray)
+ sigbytes = gray / 8;
+
+ offs += fprintf(gl2ps->stream,
+ "%d 0 obj\n"
+ "<<\n"
+ "/Type /XObject\n"
+ "/Subtype /Image\n"
+ "/Width %d\n"
+ "/Height %d\n"
+ "/ColorSpace %s \n"
+ "/BitsPerComponent 8\n",
+ obj,
+ (int)im->width, (int)im->height,
+ (gray) ? "/DeviceGray" : "/DeviceRGB" );
+ if(GL_RGBA == im->format && gray == 0){
+ offs += fprintf(gl2ps->stream,
+ "/SMask %d 0 R\n",
+ childobj);
+ }
+
+#if defined(GL2PS_HAVE_ZLIB)
+ if(gl2ps->options & GL2PS_COMPRESS){
+ gl2psAllocCompress((int)(im->width * im->height * sigbytes));
+
+ gl2psPrintPDFPixmapStreamData(im, gl2psWriteBigEndianCompress, gray);
+
+ if(Z_OK == gl2psDeflate() && 23 + gl2ps->compress->destLen < gl2ps->compress->srcLen){
+ offs += gl2psPrintPDFCompressorType();
+ offs += fprintf(gl2ps->stream,
+ "/Length %d "
+ ">>\n"
+ "stream\n",
+ (int)gl2ps->compress->destLen);
+ offs += gl2ps->compress->destLen * fwrite(gl2ps->compress->dest, gl2ps->compress->destLen,
+ 1, gl2ps->stream);
+ done = 1;
+ }
+ gl2psFreeCompress();
+ }
+#endif
+
+ if(!done){
+ /* no compression, or too long after compression, or compress error
+ -> write non-compressed entry */
+ offs += fprintf(gl2ps->stream,
+ "/Length %d "
+ ">>\n"
+ "stream\n",
+ (int)(im->width * im->height * sigbytes));
+ offs += gl2psPrintPDFPixmapStreamData(im, gl2psWriteBigEndian, gray);
+ }
+
+ offs += fprintf(gl2ps->stream,
+ "\nendstream\n"
+ "endobj\n");
+
+ return offs;
+}
+
+static int gl2psPrintPDFText(int obj, GL2PSstring *s, int fontnumber)
+{
+ int offs = 0;
+
+ offs += fprintf(gl2ps->stream,
+ "%d 0 obj\n"
+ "<<\n"
+ "/Type /Font\n"
+ "/Subtype /Type1\n"
+ "/Name /F%d\n"
+ "/BaseFont /%s\n"
+ "/Encoding /MacRomanEncoding\n"
+ ">>\n"
+ "endobj\n",
+ obj, fontnumber, s->fontname);
+ return offs;
+}
+
+/* Write the physical objects */
+
+static int gl2psPDFgroupListWriteObjects(int entryoffs)
+{
+ int i,j;
+ GL2PSprimitive *p = NULL;
+ GL2PSpdfgroup *gro;
+ int offs = entryoffs;
+ GL2PStriangle *triangles;
+ int size = 0;
+
+ if(!gl2ps->pdfgrouplist)
+ return offs;
+
+ for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
+ gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
+ if(!gl2psListNbr(gro->ptrlist))
+ continue;
+ p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0);
+ switch(p->type){
+ case GL2PS_POINT:
+ break;
+ case GL2PS_LINE:
+ break;
+ case GL2PS_TRIANGLE:
+ size = gl2psListNbr(gro->ptrlist);
+ triangles = (GL2PStriangle*)gl2psMalloc(sizeof(GL2PStriangle) * size);
+ for(j = 0; j < size; ++j){
+ p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
+ gl2psFillTriangleFromPrimitive(&triangles[j], p, GL_TRUE);
+ }
+ if(triangles[0].prop & T_VAR_COLOR){
+ gl2ps->xreflist[gro->shobjno] = offs;
+ offs += gl2psPrintPDFShader(gro->shobjno, triangles, size, 0);
+ }
+ if(triangles[0].prop & T_ALPHA_LESS_1){
+ gl2ps->xreflist[gro->gsobjno] = offs;
+ offs += gl2psPrintPDFShaderSimpleExtGS(gro->gsobjno, triangles[0].vertex[0].rgba[3]);
+ }
+ if(triangles[0].prop & T_VAR_ALPHA){
+ gl2ps->xreflist[gro->gsobjno] = offs;
+ offs += gl2psPrintPDFShaderExtGS(gro->gsobjno, gro->trgroupobjno);
+ gl2ps->xreflist[gro->trgroupobjno] = offs;
+ offs += gl2psPrintPDFShaderMask(gro->trgroupobjno, gro->maskshno);
+ gl2ps->xreflist[gro->maskshobjno] = offs;
+ offs += gl2psPrintPDFShader(gro->maskshobjno, triangles, size, 8);
+ }
+ gl2psFree(triangles);
+ break;
+ case GL2PS_PIXMAP:
+ gl2ps->xreflist[gro->imobjno] = offs;
+ offs += gl2psPrintPDFPixmap(gro->imobjno, gro->imobjno+1, p->data.image, 0);
+ if(p->data.image->format == GL_RGBA){
+ gl2ps->xreflist[gro->imobjno+1] = offs;
+ offs += gl2psPrintPDFPixmap(gro->imobjno+1, -1, p->data.image, 8);
+ }
+ break;
+ case GL2PS_TEXT:
+ gl2ps->xreflist[gro->fontobjno] = offs;
+ offs += gl2psPrintPDFText(gro->fontobjno,p->data.text,gro->fontno);
+ break;
+ case GL2PS_SPECIAL :
+ /* alignment contains the format for which the special output text
+ is intended */
+ if(p->data.text->alignment == GL2PS_PDF)
+ offs += fprintf(gl2ps->stream, "%s\n", p->data.text->str);
+ break;
+ default:
+ break;
+ }
+ }
+ return offs;
+}
+
+/* All variable data has been written at this point and all required
+ functioninality has been gathered, so we can write now file footer
+ with cross reference table and trailer */
+
+static void gl2psPrintPDFFooter(void)
+{
+ int i, offs;
+
+ gl2psPDFgroupListInit();
+ gl2psPDFgroupListWriteMainStream();
+
+ offs = gl2ps->xreflist[5] + gl2ps->streamlength;
+ offs += gl2psClosePDFDataStream();
+ gl2ps->xreflist[5] = offs;
+
+ offs += gl2psPrintPDFDataStreamLength(gl2ps->streamlength);
+ gl2ps->xreflist[6] = offs;
+ gl2ps->streamlength = 0;
+
+ offs += gl2psPrintPDFOpenPage();
+ offs += gl2psPDFgroupListWriteVariableResources();
+ gl2ps->xreflist = (int*)gl2psRealloc(gl2ps->xreflist,
+ sizeof(int) * (gl2ps->objects_stack + 1));
+ gl2ps->xreflist[7] = offs;
+
+ offs += gl2psPrintPDFGSObject();
+ gl2ps->xreflist[8] = offs;
+
+ gl2ps->xreflist[gl2ps->objects_stack] =
+ gl2psPDFgroupListWriteObjects(gl2ps->xreflist[8]);
+
+ /* Start cross reference table. The file has to been opened in
+ binary mode to preserve the 20 digit string length! */
+ fprintf(gl2ps->stream,
+ "xref\n"
+ "0 %d\n"
+ "%010d 65535 f \n", gl2ps->objects_stack, 0);
+
+ for(i = 1; i < gl2ps->objects_stack; ++i)
+ fprintf(gl2ps->stream, "%010d 00000 n \n", gl2ps->xreflist[i]);
+
+ fprintf(gl2ps->stream,
+ "trailer\n"
+ "<<\n"
+ "/Size %d\n"
+ "/Info 1 0 R\n"
+ "/Root 2 0 R\n"
+ ">>\n"
+ "startxref\n%d\n"
+ "%%%%EOF\n",
+ gl2ps->objects_stack, gl2ps->xreflist[gl2ps->objects_stack]);
+
+ /* Free auxiliary lists and arrays */
+ gl2psFree(gl2ps->xreflist);
+ gl2psListDelete(gl2ps->pdfprimlist);
+ gl2psPDFgroupListDelete();
+
+#if defined(GL2PS_HAVE_ZLIB)
+ if(gl2ps->options & GL2PS_COMPRESS){
+ gl2psFreeCompress();
+ gl2psFree(gl2ps->compress);
+ gl2ps->compress = NULL;
+ }
+#endif
+}
+
+/* PDF begin viewport */
+
+static void gl2psPrintPDFBeginViewport(GLint viewport[4])
+{
+ int offs = 0;
+ GLint index;
+ GLfloat rgba[4];
+ int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3];
+
+ glRenderMode(GL_FEEDBACK);
+
+ if(gl2ps->header){
+ gl2psPrintPDFHeader();
+ gl2ps->header = GL_FALSE;
+ }
+
+ offs += gl2psPrintf("q\n");
+
+ if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
+ if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){
+ glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba);
+ }
+ else{
+ glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index);
+ rgba[0] = gl2ps->colormap[index][0];
+ rgba[1] = gl2ps->colormap[index][1];
+ rgba[2] = gl2ps->colormap[index][2];
+ rgba[3] = 1.0F;
+ }
+ offs += gl2psPrintPDFFillColor(rgba);
+ offs += gl2psPrintf("%d %d %d %d re\n"
+ "W\n"
+ "f\n",
+ x, y, w, h);
+ }
+ else{
+ offs += gl2psPrintf("%d %d %d %d re\n"
+ "W\n"
+ "n\n",
+ x, y, w, h);
+ }
+
+ gl2ps->streamlength += offs;
+}
+
+static GLint gl2psPrintPDFEndViewport(void)
+{
+ GLint res;
+
+ res = gl2psPrintPrimitives();
+ gl2ps->streamlength += gl2psPrintf("Q\n");
+ return res;
+}
+
+static void gl2psPrintPDFFinalPrimitive(void)
+{
+}
+
+/* definition of the PDF backend */
+
+static GL2PSbackend gl2psPDF = {
+ gl2psPrintPDFHeader,
+ gl2psPrintPDFFooter,
+ gl2psPrintPDFBeginViewport,
+ gl2psPrintPDFEndViewport,
+ gl2psPrintPDFPrimitive,
+ gl2psPrintPDFFinalPrimitive,
+ "pdf",
+ "Portable Document Format"
+};
+
+/*********************************************************************
+ *
+ * SVG routines
+ *
+ *********************************************************************/
+
+static void gl2psSVGGetCoordsAndColors(int n, GL2PSvertex *verts,
+ GL2PSxyz *xyz, GL2PSrgba *rgba)
+{
+ int i, j;
+
+ for(i = 0; i < n; i++){
+ xyz[i][0] = verts[i].xyz[0];
+ xyz[i][1] = gl2ps->viewport[3] - verts[i].xyz[1];
+ xyz[i][2] = 0.0F;
+ for(j = 0; j < 4; j++)
+ rgba[i][j] = verts[i].rgba[j];
+ }
+}
+
+static void gl2psSVGGetColorString(GL2PSrgba rgba, char str[32])
+{
+ int r = (int)(255. * rgba[0]);
+ int g = (int)(255. * rgba[1]);
+ int b = (int)(255. * rgba[2]);
+ int rc = (r < 0) ? 0 : (r > 255) ? 255 : r;
+ int gc = (g < 0) ? 0 : (g > 255) ? 255 : g;
+ int bc = (b < 0) ? 0 : (b > 255) ? 255 : b;
+ sprintf(str, "#%2.2x%2.2x%2.2x", rc, gc, bc);
+}
+
+static void gl2psPrintSVGHeader(void)
+{
+ int x, y, width, height;
+ char col[32];
+ time_t now;
+
+ time(&now);
+
+ if (gl2ps->options & GL2PS_LANDSCAPE){
+ x = (int)gl2ps->viewport[1];
+ y = (int)gl2ps->viewport[0];
+ width = (int)gl2ps->viewport[3];
+ height = (int)gl2ps->viewport[2];
+ }
+ else{
+ x = (int)gl2ps->viewport[0];
+ y = (int)gl2ps->viewport[1];
+ width = (int)gl2ps->viewport[2];
+ height = (int)gl2ps->viewport[3];
+ }
+
+ /* Compressed SVG files (.svgz) are simply gzipped SVG files */
+ gl2psPrintGzipHeader();
+
+ gl2psPrintf("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n");
+ gl2psPrintf("<svg xmlns=\"http://www.w3.org/2000/svg\"\n");
+ gl2psPrintf(" xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
+ " width=\"%dpx\" height=\"%dpx\" viewBox=\"%d %d %d %d\">\n",
+ width, height, x, y, width, height);
+ gl2psPrintf("<title>%s</title>\n", gl2ps->title);
+ gl2psPrintf("<desc>\n");
+ gl2psPrintf("Creator: GL2PS %d.%d.%d%s, %s\n"
+ "For: %s\n"
+ "CreationDate: %s",
+ GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, GL2PS_PATCH_VERSION,
+ GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, gl2ps->producer, ctime(&now));
+ gl2psPrintf("</desc>\n");
+ gl2psPrintf("<defs>\n");
+ gl2psPrintf("</defs>\n");
+
+ if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
+ gl2psSVGGetColorString(gl2ps->bgcolor, col);
+ gl2psPrintf("<polygon fill=\"%s\" points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n", col,
+ (int)gl2ps->viewport[0], (int)gl2ps->viewport[1],
+ (int)gl2ps->viewport[2], (int)gl2ps->viewport[1],
+ (int)gl2ps->viewport[2], (int)gl2ps->viewport[3],
+ (int)gl2ps->viewport[0], (int)gl2ps->viewport[3]);
+ }
+
+ gl2psPrintf("<g>\n");
+}
+
+static void gl2psPrintSVGSmoothTriangle(GL2PSxyz xyz[3], GL2PSrgba rgba[3])
+{
+ int i;
+ GL2PSxyz xyz2[3];
+ GL2PSrgba rgba2[3];
+ char col[32];
+
+ /* Apparently there is no easy way to do Gouraud shading in SVG
+ without explicitly pre-defining gradients, so for now we just do
+ recursive subdivision */
+
+ if(gl2psSameColorThreshold(3, rgba, gl2ps->threshold)){
+ gl2psSVGGetColorString(rgba[0], col);
+ gl2psPrintf("<polygon fill=\"%s\" ", col);
+ if(rgba[0][3] < 1.0F) gl2psPrintf("fill-opacity=\"%g\" ", rgba[0][3]);
+ gl2psPrintf("points=\"%g,%g %g,%g %g,%g\"/>\n", xyz[0][0], xyz[0][1],
+ xyz[1][0], xyz[1][1], xyz[2][0], xyz[2][1]);
+ }
+ else{
+ /* subdivide into 4 subtriangles */
+ for(i = 0; i < 3; i++){
+ xyz2[0][i] = xyz[0][i];
+ xyz2[1][i] = 0.5 * (xyz[0][i] + xyz[1][i]);
+ xyz2[2][i] = 0.5 * (xyz[0][i] + xyz[2][i]);
+ }
+ for(i = 0; i < 4; i++){
+ rgba2[0][i] = rgba[0][i];
+ rgba2[1][i] = 0.5 * (rgba[0][i] + rgba[1][i]);
+ rgba2[2][i] = 0.5 * (rgba[0][i] + rgba[2][i]);
+ }
+ gl2psPrintSVGSmoothTriangle(xyz2, rgba2);
+ for(i = 0; i < 3; i++){
+ xyz2[0][i] = 0.5 * (xyz[0][i] + xyz[1][i]);
+ xyz2[1][i] = xyz[1][i];
+ xyz2[2][i] = 0.5 * (xyz[1][i] + xyz[2][i]);
+ }
+ for(i = 0; i < 4; i++){
+ rgba2[0][i] = 0.5 * (rgba[0][i] + rgba[1][i]);
+ rgba2[1][i] = rgba[1][i];
+ rgba2[2][i] = 0.5 * (rgba[1][i] + rgba[2][i]);
+ }
+ gl2psPrintSVGSmoothTriangle(xyz2, rgba2);
+ for(i = 0; i < 3; i++){
+ xyz2[0][i] = 0.5 * (xyz[0][i] + xyz[2][i]);
+ xyz2[1][i] = xyz[2][i];
+ xyz2[2][i] = 0.5 * (xyz[1][i] + xyz[2][i]);
+ }
+ for(i = 0; i < 4; i++){
+ rgba2[0][i] = 0.5 * (rgba[0][i] + rgba[2][i]);
+ rgba2[1][i] = rgba[2][i];
+ rgba2[2][i] = 0.5 * (rgba[1][i] + rgba[2][i]);
+ }
+ gl2psPrintSVGSmoothTriangle(xyz2, rgba2);
+ for(i = 0; i < 3; i++){
+ xyz2[0][i] = 0.5 * (xyz[0][i] + xyz[1][i]);
+ xyz2[1][i] = 0.5 * (xyz[1][i] + xyz[2][i]);
+ xyz2[2][i] = 0.5 * (xyz[0][i] + xyz[2][i]);
+ }
+ for(i = 0; i < 4; i++){
+ rgba2[0][i] = 0.5 * (rgba[0][i] + rgba[1][i]);
+ rgba2[1][i] = 0.5 * (rgba[1][i] + rgba[2][i]);
+ rgba2[2][i] = 0.5 * (rgba[0][i] + rgba[2][i]);
+ }
+ gl2psPrintSVGSmoothTriangle(xyz2, rgba2);
+ }
+}
+
+static void gl2psPrintSVGDash(GLushort pattern, GLint factor)
+{
+ int i, n, array[10];
+
+ if(!pattern || !factor) return; /* solid line */
+
+ gl2psParseStipplePattern(pattern, factor, &n, array);
+ gl2psPrintf("stroke-dasharray=\"");
+ for(i = 0; i < n; i++){
+ if(i) gl2psPrintf(",");
+ gl2psPrintf("%d", array[i]);
+ }
+ gl2psPrintf("\" ");
+}
+
+static void gl2psEndSVGLine(void)
+{
+ int i;
+ if(gl2ps->lastvertex.rgba[0] >= 0.){
+ gl2psPrintf("%g,%g\"/>\n", gl2ps->lastvertex.xyz[0],
+ gl2ps->viewport[3] - gl2ps->lastvertex.xyz[1]);
+ for(i = 0; i < 3; i++)
+ gl2ps->lastvertex.xyz[i] = -1.;
+ for(i = 0; i < 4; i++)
+ gl2ps->lastvertex.rgba[i] = -1.;
+ }
+}
+
+static void gl2psPrintSVGPixmap(GLfloat x, GLfloat y, GL2PSimage *pixmap)
+{
+#if defined(GL2PS_HAVE_LIBPNG)
+ GL2PSlist *png;
+ unsigned char c;
+ int i;
+
+ /* The only image types supported by the SVG standard are JPEG, PNG
+ and SVG. Here we choose PNG, and since we want to embed the image
+ directly in the SVG stream (and not link to an external image
+ file), we need to encode the pixmap into PNG in memory, then
+ encode it into base64. */
+
+ png = gl2psListCreate(pixmap->width * pixmap->height * 3, 1000,
+ sizeof(unsigned char));
+ gl2psConvertPixmapToPNG(pixmap, png);
+ gl2psListEncodeBase64(png);
+ gl2psPrintf("<image x=\"%g\" y=\"%g\" width=\"%d\" height=\"%d\"\n",
+ x, y - pixmap->height, pixmap->width, pixmap->height);
+ gl2psPrintf("xlink:href=\"data:image/png;base64,");
+ for(i = 0; i < gl2psListNbr(png); i++){
+ gl2psListRead(png, i, &c);
+ gl2psPrintf("%c", c);
+ }
+ gl2psPrintf("\"/>\n");
+ gl2psListDelete(png);
+#else
+ gl2psMsg(GL2PS_WARNING, "GL2PS has to be compiled with PNG support in "
+ "order to embed images in SVG streams");
+#endif
+}
+
+static void gl2psPrintSVGPrimitive(void *data)
+{
+ GL2PSprimitive *prim;
+ GL2PSxyz xyz[4];
+ GL2PSrgba rgba[4];
+ char col[32];
+ int newline;
+
+ prim = *(GL2PSprimitive**)data;
+
+ if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled) return;
+
+ /* We try to draw connected lines as a single path to get nice line
+ joins and correct stippling. So if the primitive to print is not
+ a line we must first finish the current line (if any): */
+ if(prim->type != GL2PS_LINE) gl2psEndSVGLine();
+
+ gl2psSVGGetCoordsAndColors(prim->numverts, prim->verts, xyz, rgba);
+
+ switch(prim->type){
+ case GL2PS_POINT :
+ gl2psSVGGetColorString(rgba[0], col);
+ gl2psPrintf("<circle fill=\"%s\" ", col);
+ if(rgba[0][3] < 1.0F) gl2psPrintf("fill-opacity=\"%g\" ", rgba[0][3]);
+ gl2psPrintf("cx=\"%g\" cy=\"%g\" r=\"%g\"/>\n",
+ xyz[0][0], xyz[0][1], 0.5 * prim->width);
+ break;
+ case GL2PS_LINE :
+ if(!gl2psSamePosition(gl2ps->lastvertex.xyz, prim->verts[0].xyz) ||
+ !gl2psSameColor(gl2ps->lastrgba, prim->verts[0].rgba) ||
+ gl2ps->lastlinewidth != prim->width ||
+ gl2ps->lastpattern != prim->pattern ||
+ gl2ps->lastfactor != prim->factor){
+ /* End the current line if the new segment does not start where
+ the last one ended, or if the color, the width or the
+ stippling have changed (we will need to use multi-point
+ gradients for smooth-shaded lines) */
+ gl2psEndSVGLine();
+ newline = 1;
+ }
+ else{
+ newline = 0;
+ }
+ gl2ps->lastvertex = prim->verts[1];
+ gl2psSetLastColor(prim->verts[0].rgba);
+ gl2ps->lastlinewidth = prim->width;
+ gl2ps->lastpattern = prim->pattern;
+ gl2ps->lastfactor = prim->factor;
+ if(newline){
+ gl2psSVGGetColorString(rgba[0], col);
+ gl2psPrintf("<polyline fill=\"none\" stroke=\"%s\" stroke-width=\"%g\" ",
+ col, prim->width);
+ if(rgba[0][3] < 1.0F) gl2psPrintf("stroke-opacity=\"%g\" ", rgba[0][3]);
+ gl2psPrintSVGDash(prim->pattern, prim->factor);
+ gl2psPrintf("points=\"%g,%g ", xyz[0][0], xyz[0][1]);
+ }
+ else{
+ gl2psPrintf("%g,%g ", xyz[0][0], xyz[0][1]);
+ }
+ break;
+ case GL2PS_TRIANGLE :
+ gl2psPrintSVGSmoothTriangle(xyz, rgba);
+ break;
+ case GL2PS_QUADRANGLE :
+ gl2psMsg(GL2PS_WARNING, "There should not be any quad left to print");
+ break;
+ case GL2PS_PIXMAP :
+ gl2psPrintSVGPixmap(xyz[0][0], xyz[0][1], prim->data.image);
+ break;
+ case GL2PS_TEXT :
+ gl2psSVGGetColorString(prim->verts[0].rgba, col);
+ gl2psPrintf("<text fill=\"%s\" x=\"%g\" y=\"%g\" "
+ "font-size=\"%d\" font-family=\"%s\">%s</text>\n",
+ col, xyz[0][0], xyz[0][1],
+ prim->data.text->fontsize,
+ prim->data.text->fontname,
+ prim->data.text->str);
+ break;
+ case GL2PS_SPECIAL :
+ /* alignment contains the format for which the special output text
+ is intended */
+ if(prim->data.text->alignment == GL2PS_SVG)
+ gl2psPrintf("%s\n", prim->data.text->str);
+ break;
+ default :
+ break;
+ }
+}
+
+static void gl2psPrintSVGFooter(void)
+{
+ gl2psPrintf("</g>\n");
+ gl2psPrintf("</svg>\n");
+
+ gl2psPrintGzipFooter();
+}
+
+static void gl2psPrintSVGBeginViewport(GLint viewport[4])
+{
+ GLint index;
+ char col[32];
+ GLfloat rgba[4];
+ int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3];
+
+ glRenderMode(GL_FEEDBACK);
+
+ if(gl2ps->header){
+ gl2psPrintSVGHeader();
+ gl2ps->header = GL_FALSE;
+ }
+
+ if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
+ if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){
+ glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba);
+ }
+ else{
+ glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index);
+ rgba[0] = gl2ps->colormap[index][0];
+ rgba[1] = gl2ps->colormap[index][1];
+ rgba[2] = gl2ps->colormap[index][2];
+ rgba[3] = 1.0F;
+ }
+ gl2psSVGGetColorString(rgba, col);
+ gl2psPrintf("<polygon fill=\"%s\" points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n", col,
+ x, gl2ps->viewport[3] - y,
+ x + w, gl2ps->viewport[3] - y,
+ x + w, gl2ps->viewport[3] - (y + h),
+ x, gl2ps->viewport[3] - (y + h));
+ }
+
+ gl2psPrintf("<clipPath id=\"cp%d%d%d%d\">\n", x, y, w, h);
+ gl2psPrintf(" <polygon points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n",
+ x, gl2ps->viewport[3] - y,
+ x + w, gl2ps->viewport[3] - y,
+ x + w, gl2ps->viewport[3] - (y + h),
+ x, gl2ps->viewport[3] - (y + h));
+ gl2psPrintf("</clipPath>\n");
+ gl2psPrintf("<g clip-path=\"url(#cp%d%d%d%d)\">\n", x, y, w, h);
+}
+
+static GLint gl2psPrintSVGEndViewport(void)
+{
+ GLint res;
+
+ res = gl2psPrintPrimitives();
+ gl2psPrintf("</g>\n");
+ return res;
+}
+
+static void gl2psPrintSVGFinalPrimitive(void)
+{
+ /* End any remaining line, if any */
+ gl2psEndSVGLine();
+}
+
+/* definition of the SVG backend */
+
+static GL2PSbackend gl2psSVG = {
+ gl2psPrintSVGHeader,
+ gl2psPrintSVGFooter,
+ gl2psPrintSVGBeginViewport,
+ gl2psPrintSVGEndViewport,
+ gl2psPrintSVGPrimitive,
+ gl2psPrintSVGFinalPrimitive,
+ "svg",
+ "Scalable Vector Graphics"
+};
+
+/*********************************************************************
+ *
+ * PGF routines
+ *
+ *********************************************************************/
+
+static void gl2psPrintPGFColor(GL2PSrgba rgba)
+{
+ if(!gl2psSameColor(gl2ps->lastrgba, rgba)){
+ gl2psSetLastColor(rgba);
+ fprintf(gl2ps->stream, "\\color[rgb]{%f,%f,%f}\n", rgba[0], rgba[1], rgba[2]);
+ }
+}
+
+static void gl2psPrintPGFHeader(void)
+{
+ time_t now;
+
+ time(&now);
+
+ fprintf(gl2ps->stream,
+ "%% Title: %s\n"
+ "%% Creator: GL2PS %d.%d.%d%s, %s\n"
+ "%% For: %s\n"
+ "%% CreationDate: %s",
+ gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION,
+ GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT,
+ gl2ps->producer, ctime(&now));
+
+ fprintf(gl2ps->stream, "\\begin{pgfpicture}\n");
+ if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
+ gl2psPrintPGFColor(gl2ps->bgcolor);
+ fprintf(gl2ps->stream,
+ "\\pgfpathrectanglecorners{"
+ "\\pgfpoint{%dpt}{%dpt}}{\\pgfpoint{%dpt}{%dpt}}\n"
+ "\\pgfusepath{fill}\n",
+ (int)gl2ps->viewport[0], (int)gl2ps->viewport[1],
+ (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]);
+ }
+}
+
+static void gl2psPrintPGFDash(GLushort pattern, GLint factor)
+{
+ int i, n, array[10];
+
+ if(pattern == gl2ps->lastpattern && factor == gl2ps->lastfactor)
+ return;
+
+ gl2ps->lastpattern = pattern;
+ gl2ps->lastfactor = factor;
+
+ if(!pattern || !factor){
+ /* solid line */
+ fprintf(gl2ps->stream, "\\pgfsetdash{}{0pt}\n");
+ }
+ else{
+ gl2psParseStipplePattern(pattern, factor, &n, array);
+ fprintf(gl2ps->stream, "\\pgfsetdash{");
+ for(i = 0; i < n; i++) fprintf(gl2ps->stream, "{%dpt}", array[i]);
+ fprintf(gl2ps->stream, "}{0pt}\n");
+ }
+}
+
+static const char *gl2psPGFTextAlignment(int align)
+{
+ switch(align){
+ case GL2PS_TEXT_C : return "center";
+ case GL2PS_TEXT_CL : return "west";
+ case GL2PS_TEXT_CR : return "east";
+ case GL2PS_TEXT_B : return "south";
+ case GL2PS_TEXT_BR : return "south east";
+ case GL2PS_TEXT_T : return "north";
+ case GL2PS_TEXT_TL : return "north west";
+ case GL2PS_TEXT_TR : return "north east";
+ case GL2PS_TEXT_BL :
+ default : return "south west";
+ }
+}
+
+static void gl2psPrintPGFPrimitive(void *data)
+{
+ GL2PSprimitive *prim;
+
+ prim = *(GL2PSprimitive**)data;
+
+ switch(prim->type){
+ case GL2PS_POINT :
+ /* Points in openGL are rectangular */
+ gl2psPrintPGFColor(prim->verts[0].rgba);
+ fprintf(gl2ps->stream,
+ "\\pgfpathrectangle{\\pgfpoint{%fpt}{%fpt}}"
+ "{\\pgfpoint{%fpt}{%fpt}}\n\\pgfusepath{fill}\n",
+ prim->verts[0].xyz[0]-0.5*prim->width,
+ prim->verts[0].xyz[1]-0.5*prim->width,
+ prim->width,prim->width);
+ break;
+ case GL2PS_LINE :
+ gl2psPrintPGFColor(prim->verts[0].rgba);
+ if(gl2ps->lastlinewidth != prim->width){
+ gl2ps->lastlinewidth = prim->width;
+ fprintf(gl2ps->stream, "\\pgfsetlinewidth{%fpt}\n", gl2ps->lastlinewidth);
+ }
+ gl2psPrintPGFDash(prim->pattern, prim->factor);
+ fprintf(gl2ps->stream,
+ "\\pgfpathmoveto{\\pgfpoint{%fpt}{%fpt}}\n"
+ "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n"
+ "\\pgfusepath{stroke}\n",
+ prim->verts[1].xyz[0], prim->verts[1].xyz[1],
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
+ break;
+ case GL2PS_TRIANGLE :
+ if(gl2ps->lastlinewidth != 0){
+ gl2ps->lastlinewidth = 0;
+ fprintf(gl2ps->stream, "\\pgfsetlinewidth{0.01pt}\n");
+ }
+ gl2psPrintPGFColor(prim->verts[0].rgba);
+ fprintf(gl2ps->stream,
+ "\\pgfpathmoveto{\\pgfpoint{%fpt}{%fpt}}\n"
+ "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n"
+ "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n"
+ "\\pgfpathclose\n"
+ "\\pgfusepath{fill,stroke}\n",
+ prim->verts[2].xyz[0], prim->verts[2].xyz[1],
+ prim->verts[1].xyz[0], prim->verts[1].xyz[1],
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
+ break;
+ case GL2PS_TEXT :
+ fprintf(gl2ps->stream, "{\n\\pgftransformshift{\\pgfpoint{%fpt}{%fpt}}\n",
+ prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
+
+ if(prim->data.text->angle)
+ fprintf(gl2ps->stream, "\\pgftransformrotate{%f}{", prim->data.text->angle);
+
+ fprintf(gl2ps->stream, "\\pgfnode{rectangle}{%s}{\\fontsize{%d}{0}\\selectfont",
+ gl2psPGFTextAlignment(prim->data.text->alignment),
+ prim->data.text->fontsize);
+
+ fprintf(gl2ps->stream, "\\textcolor[rgb]{%g,%g,%g}{{%s}}",
+ prim->verts[0].rgba[0], prim->verts[0].rgba[1],
+ prim->verts[0].rgba[2], prim->data.text->str);
+
+ fprintf(gl2ps->stream, "}{}{\\pgfusepath{discard}}}\n");
+ break;
+ case GL2PS_SPECIAL :
+ /* alignment contains the format for which the special output text
+ is intended */
+ if (prim->data.text->alignment == GL2PS_PGF)
+ fprintf(gl2ps->stream, "%s\n", prim->data.text->str);
+ break;
+ default :
+ break;
+ }
+}
+
+static void gl2psPrintPGFFooter(void)
+{
+ fprintf(gl2ps->stream, "\\end{pgfpicture}\n");
+}
+
+static void gl2psPrintPGFBeginViewport(GLint viewport[4])
+{
+ GLint index;
+ GLfloat rgba[4];
+ int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3];
+
+ glRenderMode(GL_FEEDBACK);
+
+ if(gl2ps->header){
+ gl2psPrintPGFHeader();
+ gl2ps->header = GL_FALSE;
+ }
+
+ fprintf(gl2ps->stream, "\\begin{pgfscope}\n");
+ if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
+ if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){
+ glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba);
+ }
+ else{
+ glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index);
+ rgba[0] = gl2ps->colormap[index][0];
+ rgba[1] = gl2ps->colormap[index][1];
+ rgba[2] = gl2ps->colormap[index][2];
+ rgba[3] = 1.0F;
+ }
+ gl2psPrintPGFColor(rgba);
+ fprintf(gl2ps->stream,
+ "\\pgfpathrectangle{\\pgfpoint{%dpt}{%dpt}}"
+ "{\\pgfpoint{%dpt}{%dpt}}\n"
+ "\\pgfusepath{fill}\n",
+ x, y, w, h);
+ }
+
+ fprintf(gl2ps->stream,
+ "\\pgfpathrectangle{\\pgfpoint{%dpt}{%dpt}}"
+ "{\\pgfpoint{%dpt}{%dpt}}\n"
+ "\\pgfusepath{clip}\n",
+ x, y, w, h);
+}
+
+static GLint gl2psPrintPGFEndViewport(void)
+{
+ GLint res;
+ res = gl2psPrintPrimitives();
+ fprintf(gl2ps->stream, "\\end{pgfscope}\n");
+ return res;
+}
+
+static void gl2psPrintPGFFinalPrimitive(void)
+{
+}
+
+/* definition of the PGF backend */
+
+static GL2PSbackend gl2psPGF = {
+ gl2psPrintPGFHeader,
+ gl2psPrintPGFFooter,
+ gl2psPrintPGFBeginViewport,
+ gl2psPrintPGFEndViewport,
+ gl2psPrintPGFPrimitive,
+ gl2psPrintPGFFinalPrimitive,
+ "tex",
+ "PGF Latex Graphics"
+};
+
+/*********************************************************************
+ *
+ * General primitive printing routine
+ *
+ *********************************************************************/
+
+/* Warning: the ordering of the backends must match the format
+ #defines in gl2ps.h */
+
+static GL2PSbackend *gl2psbackends[] = {
+ &gl2psPS, /* 0 */
+ &gl2psEPS, /* 1 */
+ &gl2psTEX, /* 2 */
+ &gl2psPDF, /* 3 */
+ &gl2psSVG, /* 4 */
+ &gl2psPGF /* 5 */
+};
+
+static void gl2psComputeTightBoundingBox(void *data)
+{
+ GL2PSprimitive *prim;
+ int i;
+
+ prim = *(GL2PSprimitive**)data;
+
+ for(i = 0; i < prim->numverts; i++){
+ if(prim->verts[i].xyz[0] < gl2ps->viewport[0])
+ gl2ps->viewport[0] = (GLint)prim->verts[i].xyz[0];
+ if(prim->verts[i].xyz[0] > gl2ps->viewport[2])
+ gl2ps->viewport[2] = (GLint)(prim->verts[i].xyz[0] + 0.5F);
+ if(prim->verts[i].xyz[1] < gl2ps->viewport[1])
+ gl2ps->viewport[1] = (GLint)prim->verts[i].xyz[1];
+ if(prim->verts[i].xyz[1] > gl2ps->viewport[3])
+ gl2ps->viewport[3] = (GLint)(prim->verts[i].xyz[1] + 0.5F);
+ }
+}
+
+static GLint gl2psPrintPrimitives(void)
+{
+ GL2PSbsptree *root;
+ GL2PSxyz eye = {0.0F, 0.0F, 100.0F * GL2PS_ZSCALE};
+ GLint used;
+
+ used = glRenderMode(GL_RENDER);
+
+ if(used < 0){
+ gl2psMsg(GL2PS_INFO, "OpenGL feedback buffer overflow");
+ return GL2PS_OVERFLOW;
+ }
+
+ if(used > 0)
+ gl2psParseFeedbackBuffer(used);
+
+ gl2psRescaleAndOffset();
+
+ if(gl2ps->header){
+ if(gl2psListNbr(gl2ps->primitives) &&
+ (gl2ps->options & GL2PS_TIGHT_BOUNDING_BOX)){
+ gl2ps->viewport[0] = gl2ps->viewport[1] = 100000;
+ gl2ps->viewport[2] = gl2ps->viewport[3] = -100000;
+ gl2psListAction(gl2ps->primitives, gl2psComputeTightBoundingBox);
+ }
+ (gl2psbackends[gl2ps->format]->printHeader)();
+ gl2ps->header = GL_FALSE;
+ }
+
+ if(!gl2psListNbr(gl2ps->primitives)){
+ /* empty feedback buffer and/or nothing else to print */
+ return GL2PS_NO_FEEDBACK;
+ }
+
+ switch(gl2ps->sort){
+ case GL2PS_NO_SORT :
+ gl2psListAction(gl2ps->primitives, gl2psbackends[gl2ps->format]->printPrimitive);
+ gl2psListAction(gl2ps->primitives, gl2psFreePrimitive);
+ /* reset the primitive list, waiting for the next viewport */
+ gl2psListReset(gl2ps->primitives);
+ break;
+ case GL2PS_SIMPLE_SORT :
+ gl2psListSort(gl2ps->primitives, gl2psCompareDepth);
+ if(gl2ps->options & GL2PS_OCCLUSION_CULL){
+ gl2psListActionInverse(gl2ps->primitives, gl2psAddInImageTree);
+ gl2psFreeBspImageTree(&gl2ps->imagetree);
+ }
+ gl2psListAction(gl2ps->primitives, gl2psbackends[gl2ps->format]->printPrimitive);
+ gl2psListAction(gl2ps->primitives, gl2psFreePrimitive);
+ /* reset the primitive list, waiting for the next viewport */
+ gl2psListReset(gl2ps->primitives);
+ break;
+ case GL2PS_BSP_SORT :
+ root = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree));
+ gl2psBuildBspTree(root, gl2ps->primitives);
+ if(GL_TRUE == gl2ps->boundary) gl2psBuildPolygonBoundary(root);
+ if(gl2ps->options & GL2PS_OCCLUSION_CULL){
+ gl2psTraverseBspTree(root, eye, -GL2PS_EPSILON, gl2psLess,
+ gl2psAddInImageTree, 1);
+ gl2psFreeBspImageTree(&gl2ps->imagetree);
+ }
+ gl2psTraverseBspTree(root, eye, GL2PS_EPSILON, gl2psGreater,
+ gl2psbackends[gl2ps->format]->printPrimitive, 0);
+ gl2psFreeBspTree(&root);
+ /* reallocate the primitive list (it's been deleted by
+ gl2psBuildBspTree) in case there is another viewport */
+ gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*));
+ break;
+ }
+ gl2psbackends[gl2ps->format]->printFinalPrimitive();
+
+ return GL2PS_SUCCESS;
+}
+
+/*********************************************************************
+ *
+ * Public routines
+ *
+ *********************************************************************/
+
+GL2PSDLL_API GLint gl2psBeginPage(const char *title, const char *producer,
+ GLint viewport[4], GLint format, GLint sort,
+ GLint options, GLint colormode,
+ GLint colorsize, GL2PSrgba *colormap,
+ GLint nr, GLint ng, GLint nb, GLint buffersize,
+ FILE *stream, const char *filename)
+{
+ GLint index;
+ int i;
+
+ if(gl2ps){
+ gl2psMsg(GL2PS_ERROR, "gl2psBeginPage called in wrong program state");
+ return GL2PS_ERROR;
+ }
+
+ gl2ps = (GL2PScontext*)gl2psMalloc(sizeof(GL2PScontext));
+
+ if(format >= 0 && format < (GLint)(sizeof(gl2psbackends)/sizeof(gl2psbackends[0]))){
+ gl2ps->format = format;
+ }
+ else {
+ gl2psMsg(GL2PS_ERROR, "Unknown output format: %d", format);
+ gl2psFree(gl2ps);
+ gl2ps = NULL;
+ return GL2PS_ERROR;
+ }
+
+ switch(sort){
+ case GL2PS_NO_SORT :
+ case GL2PS_SIMPLE_SORT :
+ case GL2PS_BSP_SORT :
+ gl2ps->sort = sort;
+ break;
+ default :
+ gl2psMsg(GL2PS_ERROR, "Unknown sorting algorithm: %d", sort);
+ gl2psFree(gl2ps);
+ gl2ps = NULL;
+ return GL2PS_ERROR;
+ }
+
+ if(stream){
+ gl2ps->stream = stream;
+ }
+ else{
+ gl2psMsg(GL2PS_ERROR, "Bad file pointer");
+ gl2psFree(gl2ps);
+ gl2ps = NULL;
+ return GL2PS_ERROR;
+ }
+
+ gl2ps->header = GL_TRUE;
+ gl2ps->maxbestroot = 10;
+ gl2ps->options = options;
+ gl2ps->compress = NULL;
+ gl2ps->imagemap_head = NULL;
+ gl2ps->imagemap_tail = NULL;
+
+ if(gl2ps->options & GL2PS_USE_CURRENT_VIEWPORT){
+ glGetIntegerv(GL_VIEWPORT, gl2ps->viewport);
+ }
+ else{
+ for(i = 0; i < 4; i++){
+ gl2ps->viewport[i] = viewport[i];
+ }
+ }
+
+ if(!gl2ps->viewport[2] || !gl2ps->viewport[3]){
+ gl2psMsg(GL2PS_ERROR, "Incorrect viewport (x=%d, y=%d, width=%d, height=%d)",
+ gl2ps->viewport[0], gl2ps->viewport[1],
+ gl2ps->viewport[2], gl2ps->viewport[3]);
+ gl2psFree(gl2ps);
+ gl2ps = NULL;
+ return GL2PS_ERROR;
+ }
+
+ gl2ps->threshold[0] = nr ? 1.0F/(GLfloat)nr : 0.064F;
+ gl2ps->threshold[1] = ng ? 1.0F/(GLfloat)ng : 0.034F;
+ gl2ps->threshold[2] = nb ? 1.0F/(GLfloat)nb : 0.100F;
+ gl2ps->colormode = colormode;
+ gl2ps->buffersize = buffersize > 0 ? buffersize : 2048 * 2048;
+ for(i = 0; i < 3; i++){
+ gl2ps->lastvertex.xyz[i] = -1.0F;
+ }
+ for(i = 0; i < 4; i++){
+ gl2ps->lastvertex.rgba[i] = -1.0F;
+ gl2ps->lastrgba[i] = -1.0F;
+ }
+ gl2ps->lastlinewidth = -1.0F;
+ gl2ps->lastpattern = 0;
+ gl2ps->lastfactor = 0;
+ gl2ps->imagetree = NULL;
+ gl2ps->primitivetoadd = NULL;
+ gl2ps->zerosurfacearea = GL_FALSE;
+ gl2ps->pdfprimlist = NULL;
+ gl2ps->pdfgrouplist = NULL;
+ gl2ps->xreflist = NULL;
+
+ /* get default blending mode from current OpenGL state (enabled by
+ default for SVG) */
+ gl2ps->blending = (gl2ps->format == GL2PS_SVG) ? GL_TRUE : glIsEnabled(GL_BLEND);
+ glGetIntegerv(GL_BLEND_SRC, &gl2ps->blendfunc[0]);
+ glGetIntegerv(GL_BLEND_DST, &gl2ps->blendfunc[1]);
+
+ if(gl2ps->colormode == GL_RGBA){
+ gl2ps->colorsize = 0;
+ gl2ps->colormap = NULL;
+ glGetFloatv(GL_COLOR_CLEAR_VALUE, gl2ps->bgcolor);
+ }
+ else if(gl2ps->colormode == GL_COLOR_INDEX){
+ if(!colorsize || !colormap){
+ gl2psMsg(GL2PS_ERROR, "Missing colormap for GL_COLOR_INDEX rendering");
+ gl2psFree(gl2ps);
+ gl2ps = NULL;
+ return GL2PS_ERROR;
+ }
+ gl2ps->colorsize = colorsize;
+ gl2ps->colormap = (GL2PSrgba*)gl2psMalloc(gl2ps->colorsize * sizeof(GL2PSrgba));
+ memcpy(gl2ps->colormap, colormap, gl2ps->colorsize * sizeof(GL2PSrgba));
+ glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index);
+ gl2ps->bgcolor[0] = gl2ps->colormap[index][0];
+ gl2ps->bgcolor[1] = gl2ps->colormap[index][1];
+ gl2ps->bgcolor[2] = gl2ps->colormap[index][2];
+ gl2ps->bgcolor[3] = 1.0F;
+ }
+ else{
+ gl2psMsg(GL2PS_ERROR, "Unknown color mode in gl2psBeginPage");
+ gl2psFree(gl2ps);
+ gl2ps = NULL;
+ return GL2PS_ERROR;
+ }
+
+ if(!title){
+ gl2ps->title = (char*)gl2psMalloc(sizeof(char));
+ gl2ps->title[0] = '\0';
+ }
+ else{
+ gl2ps->title = (char*)gl2psMalloc((strlen(title)+1)*sizeof(char));
+ strcpy(gl2ps->title, title);
+ }
+
+ if(!producer){
+ gl2ps->producer = (char*)gl2psMalloc(sizeof(char));
+ gl2ps->producer[0] = '\0';
+ }
+ else{
+ gl2ps->producer = (char*)gl2psMalloc((strlen(producer)+1)*sizeof(char));
+ strcpy(gl2ps->producer, producer);
+ }
+
+ if(!filename){
+ gl2ps->filename = (char*)gl2psMalloc(sizeof(char));
+ gl2ps->filename[0] = '\0';
+ }
+ else{
+ gl2ps->filename = (char*)gl2psMalloc((strlen(filename)+1)*sizeof(char));
+ strcpy(gl2ps->filename, filename);
+ }
+
+ gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*));
+ gl2ps->auxprimitives = gl2psListCreate(100, 100, sizeof(GL2PSprimitive*));
+ gl2ps->feedback = (GLfloat*)gl2psMalloc(gl2ps->buffersize * sizeof(GLfloat));
+ glFeedbackBuffer(gl2ps->buffersize, GL_3D_COLOR, gl2ps->feedback);
+ glRenderMode(GL_FEEDBACK);
+
+ return GL2PS_SUCCESS;
+}
+
+GL2PSDLL_API GLint gl2psEndPage(void)
+{
+ GLint res;
+
+ if(!gl2ps) return GL2PS_UNINITIALIZED;
+
+ res = gl2psPrintPrimitives();
+
+ if(res != GL2PS_OVERFLOW)
+ (gl2psbackends[gl2ps->format]->printFooter)();
+
+ fflush(gl2ps->stream);
+
+ gl2psListDelete(gl2ps->primitives);
+ gl2psListDelete(gl2ps->auxprimitives);
+ gl2psFreeImagemap(gl2ps->imagemap_head);
+ gl2psFree(gl2ps->colormap);
+ gl2psFree(gl2ps->title);
+ gl2psFree(gl2ps->producer);
+ gl2psFree(gl2ps->filename);
+ gl2psFree(gl2ps->feedback);
+ gl2psFree(gl2ps);
+ gl2ps = NULL;
+
+ return res;
+}
+
+GL2PSDLL_API GLint gl2psBeginViewport(GLint viewport[4])
+{
+ if(!gl2ps) return GL2PS_UNINITIALIZED;
+
+ (gl2psbackends[gl2ps->format]->beginViewport)(viewport);
+
+ return GL2PS_SUCCESS;
+}
+
+GL2PSDLL_API GLint gl2psEndViewport(void)
+{
+ GLint res;
+
+ if(!gl2ps) return GL2PS_UNINITIALIZED;
+
+ res = (gl2psbackends[gl2ps->format]->endViewport)();
+
+ return res;
+}
+
+GL2PSDLL_API GLint gl2psTextOpt(const char *str, const char *fontname,
+ GLshort fontsize, GLint alignment, GLfloat angle)
+{
+ return gl2psAddText(GL2PS_TEXT, str, fontname, fontsize, alignment, angle);
+}
+
+GL2PSDLL_API GLint gl2psText(const char *str, const char *fontname, GLshort fontsize)
+{
+ return gl2psAddText(GL2PS_TEXT, str, fontname, fontsize, GL2PS_TEXT_BL, 0.0F);
+}
+
+GL2PSDLL_API GLint gl2psSpecial(GLint format, const char *str)
+{
+ return gl2psAddText(GL2PS_SPECIAL, str, "", 0, format, 0.0F);
+}
+
+GL2PSDLL_API GLint gl2psDrawPixels(GLsizei width, GLsizei height,
+ GLint xorig, GLint yorig,
+ GLenum format, GLenum type,
+ const void *pixels)
+{
+ int size, i;
+ GLfloat pos[4], *piv;
+ GL2PSprimitive *prim;
+ GLboolean valid;
+
+ if(!gl2ps || !pixels) return GL2PS_UNINITIALIZED;
+
+ if((width <= 0) || (height <= 0)) return GL2PS_ERROR;
+
+ if(gl2ps->options & GL2PS_NO_PIXMAP) return GL2PS_SUCCESS;
+
+ if((format != GL_RGB && format != GL_RGBA) || type != GL_FLOAT){
+ gl2psMsg(GL2PS_ERROR, "gl2psDrawPixels only implemented for "
+ "GL_RGB/GL_RGBA, GL_FLOAT pixels");
+ return GL2PS_ERROR;
+ }
+
+ glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid);
+ if(GL_FALSE == valid) return GL2PS_SUCCESS; /* the primitive is culled */
+
+ glGetFloatv(GL_CURRENT_RASTER_POSITION, pos);
+
+ prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
+ prim->type = GL2PS_PIXMAP;
+ prim->boundary = 0;
+ prim->numverts = 1;
+ prim->verts = (GL2PSvertex*)gl2psMalloc(sizeof(GL2PSvertex));
+ prim->verts[0].xyz[0] = pos[0] + xorig;
+ prim->verts[0].xyz[1] = pos[1] + yorig;
+ prim->verts[0].xyz[2] = pos[2];
+ prim->culled = 0;
+ prim->offset = 0;
+ prim->pattern = 0;
+ prim->factor = 0;
+ prim->width = 1;
+ glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba);
+ prim->data.image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage));
+ prim->data.image->width = width;
+ prim->data.image->height = height;
+ prim->data.image->format = format;
+ prim->data.image->type = type;
+
+ switch(format){
+ case GL_RGBA:
+ if(gl2ps->options & GL2PS_NO_BLENDING || !gl2ps->blending){
+ /* special case: blending turned off */
+ prim->data.image->format = GL_RGB;
+ size = height * width * 3;
+ prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat));
+ piv = (GLfloat*)pixels;
+ for(i = 0; i < size; ++i, ++piv){
+ prim->data.image->pixels[i] = *piv;
+ if(!((i+1)%3))
+ ++piv;
+ }
+ }
+ else{
+ size = height * width * 4;
+ prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat));
+ memcpy(prim->data.image->pixels, pixels, size * sizeof(GLfloat));
+ }
+ break;
+ case GL_RGB:
+ default:
+ size = height * width * 3;
+ prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat));
+ memcpy(prim->data.image->pixels, pixels, size * sizeof(GLfloat));
+ break;
+ }
+
+ gl2psListAdd(gl2ps->auxprimitives, &prim);
+ glPassThrough(GL2PS_DRAW_PIXELS_TOKEN);
+
+ return GL2PS_SUCCESS;
+}
+
+GL2PSDLL_API GLint gl2psDrawImageMap(GLsizei width, GLsizei height,
+ const GLfloat position[3],
+ const unsigned char *imagemap){
+ int size, i;
+ int sizeoffloat = sizeof(GLfloat);
+
+ if(!gl2ps || !imagemap) return GL2PS_UNINITIALIZED;
+
+ if((width <= 0) || (height <= 0)) return GL2PS_ERROR;
+
+ size = height + height * ((width-1)/8);
+ glPassThrough(GL2PS_IMAGEMAP_TOKEN);
+ glBegin(GL_POINTS);
+ glVertex3f(position[0], position[1],position[2]);
+ glEnd();
+ glPassThrough((GLfloat)width);
+ glPassThrough((GLfloat)height);
+ for(i = 0; i < size; i += sizeoffloat){
+ float *value = (float*)imagemap;
+ glPassThrough(*value);
+ imagemap += sizeoffloat;
+ }
+ return GL2PS_SUCCESS;
+}
+
+GL2PSDLL_API GLint gl2psEnable(GLint mode)
+{
+ GLint tmp;
+
+ if(!gl2ps) return GL2PS_UNINITIALIZED;
+
+ switch(mode){
+ case GL2PS_POLYGON_OFFSET_FILL :
+ glPassThrough(GL2PS_BEGIN_OFFSET_TOKEN);
+ glGetFloatv(GL_POLYGON_OFFSET_FACTOR, &gl2ps->offset[0]);
+ glGetFloatv(GL_POLYGON_OFFSET_UNITS, &gl2ps->offset[1]);
+ break;
+ case GL2PS_POLYGON_BOUNDARY :
+ glPassThrough(GL2PS_BEGIN_BOUNDARY_TOKEN);
+ break;
+ case GL2PS_LINE_STIPPLE :
+ glPassThrough(GL2PS_BEGIN_STIPPLE_TOKEN);
+ glGetIntegerv(GL_LINE_STIPPLE_PATTERN, &tmp);
+ glPassThrough((GLfloat)tmp);
+ glGetIntegerv(GL_LINE_STIPPLE_REPEAT, &tmp);
+ glPassThrough((GLfloat)tmp);
+ break;
+ case GL2PS_BLEND :
+ glPassThrough(GL2PS_BEGIN_BLEND_TOKEN);
+ break;
+ default :
+ gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psEnable: %d", mode);
+ return GL2PS_WARNING;
+ }
+
+ return GL2PS_SUCCESS;
+}
+
+GL2PSDLL_API GLint gl2psDisable(GLint mode)
+{
+ if(!gl2ps) return GL2PS_UNINITIALIZED;
+
+ switch(mode){
+ case GL2PS_POLYGON_OFFSET_FILL :
+ glPassThrough(GL2PS_END_OFFSET_TOKEN);
+ break;
+ case GL2PS_POLYGON_BOUNDARY :
+ glPassThrough(GL2PS_END_BOUNDARY_TOKEN);
+ break;
+ case GL2PS_LINE_STIPPLE :
+ glPassThrough(GL2PS_END_STIPPLE_TOKEN);
+ break;
+ case GL2PS_BLEND :
+ glPassThrough(GL2PS_END_BLEND_TOKEN);
+ break;
+ default :
+ gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psDisable: %d", mode);
+ return GL2PS_WARNING;
+ }
+
+ return GL2PS_SUCCESS;
+}
+
+GL2PSDLL_API GLint gl2psPointSize(GLfloat value)
+{
+ if(!gl2ps) return GL2PS_UNINITIALIZED;
+
+ glPassThrough(GL2PS_POINT_SIZE_TOKEN);
+ glPassThrough(value);
+
+ return GL2PS_SUCCESS;
+}
+
+GL2PSDLL_API GLint gl2psLineWidth(GLfloat value)
+{
+ if(!gl2ps) return GL2PS_UNINITIALIZED;
+
+ glPassThrough(GL2PS_LINE_WIDTH_TOKEN);
+ glPassThrough(value);
+
+ return GL2PS_SUCCESS;
+}
+
+GL2PSDLL_API GLint gl2psBlendFunc(GLenum sfactor, GLenum dfactor)
+{
+ if(!gl2ps) return GL2PS_UNINITIALIZED;
+
+ if(GL_FALSE == gl2psSupportedBlendMode(sfactor, dfactor))
+ return GL2PS_WARNING;
+
+ glPassThrough(GL2PS_SRC_BLEND_TOKEN);
+ glPassThrough((GLfloat)sfactor);
+ glPassThrough(GL2PS_DST_BLEND_TOKEN);
+ glPassThrough((GLfloat)dfactor);
+
+ return GL2PS_SUCCESS;
+}
+
+GL2PSDLL_API GLint gl2psSetOptions(GLint options)
+{
+ if(!gl2ps) return GL2PS_UNINITIALIZED;
+
+ gl2ps->options = options;
+
+ return GL2PS_SUCCESS;
+}
+
+GL2PSDLL_API const char *gl2psGetFileExtension(GLint format)
+{
+ if(format >= 0 && format < (GLint)(sizeof(gl2psbackends)/sizeof(gl2psbackends[0])))
+ return gl2psbackends[format]->file_extension;
+ else
+ return "Unknown format";
+}
+
+GL2PSDLL_API const char *gl2psGetFormatDescription(GLint format)
+{
+ if(format >= 0 && format < (GLint)(sizeof(gl2psbackends)/sizeof(gl2psbackends[0])))
+ return gl2psbackends[format]->description;
+ else
+ return "Unknown format";
+}
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