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#include "gblblit.h"
#include <stdio.h>
/* blitting gray glyphs
*/
/* generic macros
*/
#define GRGB_PACK(r,g,b) ( ((GBlenderPixel)(r) << 16) | \
((GBlenderPixel)(g) << 8) | \
(GBlenderPixel)(b) )
#define GDST_STORE3(d,r,g,b) (d)[0] = (unsigned char)(r); \
(d)[1] = (unsigned char)(g); \
(d)[2] = (unsigned char)(b)
/* */
#define GRGB_TO_RGB565(r,g,b) ((unsigned short)( ((r << 8) & 0xF800) | \
((g << 3) & 0x07E0) | \
((b >> 3) & 0x001F) ) )
#define GRGB565_TO_RGB24(p) ( ( ((p) << 8) & 0xF80000 ) | \
( ((p) << 3) & 0x0700F8 ) | \
( ((p) << 5) & 0x00FC00 ) | \
( ((p) >> 1) & 0x000300 ) | \
( ((p) >> 2) & 0x000007 ) )
#define GRGB24_TO_RGB565(p) ( (unsigned short)( (((p) >> 8) & 0xF800 ) | \
(((p) >> 5) & 0x07E0 ) | \
(((p) >> 3) & 0x001F ) ) )
/* */
#define GRGB_TO_BGR565(r,g,b) GRGB_TO_RGB565(b,g,r)
#define GBGR565_TO_RGB24(p) ( ( ((p) << 19) & 0xF80000 ) | \
( ((p) << 12) & 0x070000 ) | \
( ((p) << 5) & 0x00FC00 ) | \
( ((p) >> 1) & 0x000300 ) | \
( ((p) >> 8) & 0x0000F8 ) | \
( ((p) >> 13) & 0x000007 ) )
#define GRGB24_TO_BGR565(p) ( (unsigned short)( (((p) << 8) & 0xF800 ) | \
(((p) >> 5) & 0x07E0 ) | \
(((p) >> 19) & 0x001F ) ) )
/* */
/* Rgb32 blitting routines
*/
#define GDST_TYPE rgb32
#define GDST_INCR 4
#define GDST_READ(d,p) (p) = *(GBlenderPixel*)(d) & 0xFFFFFF
#define GDST_COPY(d) *(GBlenderPixel*)(d) = color
#define GDST_STOREP(d,cells,a) *(GBlenderPixel*)(d) = (cells)[(a)]
#define GDST_STOREB(d,cells,a) \
{ \
GBlenderCell* _g = (cells) + (a)*3; \
\
GDST_STOREC(d,_g[0],_g[1],_g[2]); \
}
#define GDST_STOREC(d,r,g,b) *(GBlenderPixel*)(d) = GRGB_PACK(r,g,b)
#define GDST_COPY_VAR /* nothing */
#include "gblany.h"
/* Rgb24 blitting routines
*/
#define GDST_TYPE rgb24
#define GDST_INCR 3
#define GDST_READ(d,p) (p) = GRGB_PACK((d)[0],(d)[1],(d)[2])
#define GDST_COPY(d) GDST_STORE3(d,r,g,b)
#define GDST_STOREC(d,r,g,b) GDST_STORE3(d,r,g,b)
#define GDST_STOREB(d,cells,a) \
{ \
GBlenderCell* _g = (cells) + (a)*3; \
\
(d)[0] = _g[0]; \
(d)[1] = _g[1]; \
(d)[2] = _g[2]; \
}
#define GDST_STOREP(d,cells,a) \
{ \
GBlenderPixel _pix = (cells)[(a)]; \
\
GDST_STORE3(d,_pix >> 16,_pix >> 8,_pix); \
}
#define GDST_COPY_VAR /* nothing */
#include "gblany.h"
/* Rgb565 blitting routines
*/
#define GDST_TYPE rgb565
#define GDST_INCR 2
#define GDST_READ(d,p) p = (GBlenderPixel)*(unsigned short*)(d); \
p = GRGB565_TO_RGB24(p)
#define GDST_COPY_VAR unsigned short pix = GRGB_TO_RGB565(r,g,b);
#define GDST_COPY(d) *(unsigned short*)(d) = pix
#define GDST_STOREB(d,cells,a) \
{ \
GBlenderCell* _g = (cells) + (a)*3; \
\
*(unsigned short*)(d) = GRGB_TO_RGB565(_g[0],_g[1],_g[2]); \
}
#define GDST_STOREP(d,cells,a) \
{ \
GBlenderPixel _pix = (cells)[(a)]; \
\
*(unsigned short*)(d) = GRGB24_TO_RGB565(_pix); \
}
#define GDST_STOREC(d,r,g,b) *(unsigned short*)(d) = GRGB_TO_RGB565(r,g,b)
#include "gblany.h"
/* Bgr565 blitting routines
*/
#define GDST_TYPE bgr565
#define GDST_INCR 2
#define GDST_READ(d,p) p = (GBlenderPixel)*(unsigned short*)(d); \
p = GBGR565_TO_RGB24(p)
#define GDST_COPY_VAR unsigned short pix = GRGB_TO_BGR565(r,g,b);
#define GDST_COPY(d) *(d) = pix
#define GDST_STOREB(d,cells,a) \
{ \
GBlenderCell* _g = (cells) + (a)*3; \
\
*(unsigned short*)(d) = GRGB_TO_BGR565(_g[0],_g[1],_g[2]); \
}
#define GDST_STOREP(d,cells,a) \
{ \
GBlenderPixel _pix = (cells)[(a)]; \
\
*(unsigned short*)(d) = GRGB24_TO_BGR565(_pix); \
}
#define GDST_STOREC(d,r,g,b) *(unsigned short*)(d) = GRGB_TO_BGR565(r,g,b)
#include "gblany.h"
/* */
static void
_gblender_blit_dummy( GBlenderBlit blit,
GBlenderPixel color )
{
(blit)=(blit);
(color)=(color);
}
GBLENDER_APIDEF( int )
gblender_blit_init( GBlenderBlit blit,
GBlender blender,
int dst_x,
int dst_y,
GBlenderSourceFormat src_format,
const unsigned char* src_buffer,
int src_pitch,
int src_width,
int src_height,
GBlenderTargetFormat dst_format,
unsigned char* dst_buffer,
int dst_pitch,
int dst_width,
int dst_height )
{
int src_x = 0;
int src_y = 0;
int delta;
GBlenderBlitFunc blit_func = 0;
switch ( src_format )
{
case GBLENDER_SOURCE_GRAY8:
switch ( dst_format )
{
case GBLENDER_TARGET_RGB32: blit_func = _gblender_blit_gray8_rgb32; break;
case GBLENDER_TARGET_RGB24: blit_func = _gblender_blit_gray8_rgb24; break;
case GBLENDER_TARGET_RGB565: blit_func = _gblender_blit_gray8_rgb565; break;
case GBLENDER_TARGET_BGR565: blit_func = _gblender_blit_gray8_bgr565; break;
default:
;
}
break;
case GBLENDER_SOURCE_HRGB:
switch ( dst_format )
{
case GBLENDER_TARGET_RGB32: blit_func = _gblender_blit_hrgb_rgb32; break;
case GBLENDER_TARGET_RGB24: blit_func = _gblender_blit_hrgb_rgb24; break;
case GBLENDER_TARGET_RGB565: blit_func = _gblender_blit_hrgb_rgb565; break;
case GBLENDER_TARGET_BGR565: blit_func = _gblender_blit_hrgb_bgr565; break;
default:
;
}
break;
case GBLENDER_SOURCE_HBGR:
switch ( dst_format )
{
case GBLENDER_TARGET_RGB32: blit_func = _gblender_blit_hbgr_rgb32; break;
case GBLENDER_TARGET_RGB24: blit_func = _gblender_blit_hbgr_rgb24; break;
case GBLENDER_TARGET_RGB565: blit_func = _gblender_blit_hbgr_rgb565; break;
case GBLENDER_TARGET_BGR565: blit_func = _gblender_blit_hbgr_bgr565; break;
default:
;
}
break;
case GBLENDER_SOURCE_VRGB:
switch ( dst_format )
{
case GBLENDER_TARGET_RGB32: blit_func = _gblender_blit_vrgb_rgb32; break;
case GBLENDER_TARGET_RGB24: blit_func = _gblender_blit_vrgb_rgb24; break;
case GBLENDER_TARGET_RGB565: blit_func = _gblender_blit_vrgb_rgb565; break;
case GBLENDER_TARGET_BGR565: blit_func = _gblender_blit_vrgb_bgr565; break;
default:
;
}
break;
case GBLENDER_SOURCE_VBGR:
switch ( dst_format )
{
case GBLENDER_TARGET_RGB32: blit_func = _gblender_blit_vbgr_rgb32; break;
case GBLENDER_TARGET_RGB24: blit_func = _gblender_blit_vbgr_rgb24; break;
case GBLENDER_TARGET_RGB565: blit_func = _gblender_blit_vbgr_rgb565; break;
case GBLENDER_TARGET_BGR565: blit_func = _gblender_blit_vbgr_bgr565; break;
default:
;
}
break;
default:
;
}
blit->blender = blender;
blit->blit_func = blit_func;
if ( blit_func == 0 )
{
/* unsupported blit mode
*/
blit->blit_func = _gblender_blit_dummy;
return -2;
}
if ( dst_x < 0 )
{
src_width += dst_x;
src_x -= dst_x;
dst_x = 0;
}
delta = dst_x + src_width - dst_width;
if ( delta > 0 )
src_width -= delta;
if ( dst_y < 0 )
{
src_height += dst_y;
src_y -= dst_y;
dst_y = 0;
}
delta = dst_y + src_height - dst_height;
if ( delta > 0 )
src_height -= delta;
/* nothing to blit
*/
if ( src_width <= 0 || src_height <= 0 )
{
blit->blit_func = _gblender_blit_dummy;
return -1;
}
blit->width = src_width;
blit->height = src_height;
blit->src_format = src_format;
blit->dst_format = dst_format;
blit->src_x = src_x;
blit->src_y = src_y;
blit->src_line = src_buffer + src_pitch*src_y;
blit->src_pitch = src_pitch;
if ( src_pitch < 0 )
blit->src_line -= (src_height-1)*src_pitch;
blit->dst_x = dst_x;
blit->dst_y = dst_y;
blit->dst_line = dst_buffer + dst_pitch*dst_y;
blit->dst_pitch = dst_pitch;
if ( dst_pitch < 0 )
blit->dst_line -= (dst_height-1)*dst_pitch;
return 0;
}
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