summaryrefslogtreecommitdiffstats
path: root/uirdesktop/bitmap.c
diff options
context:
space:
mode:
Diffstat (limited to 'uirdesktop/bitmap.c')
-rw-r--r--uirdesktop/bitmap.c2274
1 files changed, 1253 insertions, 1021 deletions
diff --git a/uirdesktop/bitmap.c b/uirdesktop/bitmap.c
index 18e0cee7..e9e4ed3a 100644
--- a/uirdesktop/bitmap.c
+++ b/uirdesktop/bitmap.c
@@ -1,1021 +1,1253 @@
-/* -*- c-basic-offset: 8 -*-
- rdesktop: A Remote Desktop Protocol client.
- Bitmap decompression routines
- Copyright (C) Matthew Chapman 1999-2005
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; 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 the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-/* three seperate function for speed when decompressing the bitmaps */
-/* when modifing one function make the change in the others */
-/* comment out #define BITMAP_SPEED_OVER_SIZE below for one slower function */
-/* j@american-data.com */
-
-#define BITMAP_SPEED_OVER_SIZE
-
-/* indent is confused by this file */
-/* *INDENT-OFF* */
-
-#include "rdesktop.h"
-
-#define CVAL(p) (*(p++))
-#ifdef NEED_ALIGN
-#ifdef L_ENDIAN
-#define CVAL2(p, v) { v = (*(p++)); v |= (*(p++)) << 8; }
-#else
-#define CVAL2(p, v) { v = (*(p++)) << 8; v |= (*(p++)); }
-#endif /* L_ENDIAN */
-#else
-#define CVAL2(p, v) { v = (*((uint16*)p)); p += 2; }
-#endif /* NEED_ALIGN */
-
-#define UNROLL8(exp) { exp exp exp exp exp exp exp exp }
-
-#define REPEAT(statement) \
-{ \
- while((count & ~0x7) && ((x+8) < width)) \
- UNROLL8( statement; count--; x++; ); \
- \
- while((count > 0) && (x < width)) \
- { \
- statement; \
- count--; \
- x++; \
- } \
-}
-
-#define MASK_UPDATE() \
-{ \
- mixmask <<= 1; \
- if (mixmask == 0) \
- { \
- mask = fom_mask ? fom_mask : CVAL(input); \
- mixmask = 1; \
- } \
-}
-
-#ifdef BITMAP_SPEED_OVER_SIZE
-
-/* 1 byte bitmap decompress */
-static BOOL
-bitmap_decompress1(uint8 * output, int width, int height, uint8 * input, int size)
-{
- uint8 *end = input + size;
- uint8 *prevline = NULL, *line = NULL;
- int opcode, count, offset, isfillormix, x = width;
- int lastopcode = -1, insertmix = False, bicolour = False;
- uint8 code;
- uint8 colour1 = 0, colour2 = 0;
- uint8 mixmask, mask = 0;
- uint8 mix = 0xff;
- int fom_mask = 0;
-
- while (input < end)
- {
- fom_mask = 0;
- code = CVAL(input);
- opcode = code >> 4;
- /* Handle different opcode forms */
- switch (opcode)
- {
- case 0xc:
- case 0xd:
- case 0xe:
- opcode -= 6;
- count = code & 0xf;
- offset = 16;
- break;
- case 0xf:
- opcode = code & 0xf;
- if (opcode < 9)
- {
- count = CVAL(input);
- count |= CVAL(input) << 8;
- }
- else
- {
- count = (opcode < 0xb) ? 8 : 1;
- }
- offset = 0;
- break;
- default:
- opcode >>= 1;
- count = code & 0x1f;
- offset = 32;
- break;
- }
- /* Handle strange cases for counts */
- if (offset != 0)
- {
- isfillormix = ((opcode == 2) || (opcode == 7));
- if (count == 0)
- {
- if (isfillormix)
- count = CVAL(input) + 1;
- else
- count = CVAL(input) + offset;
- }
- else if (isfillormix)
- {
- count <<= 3;
- }
- }
- /* Read preliminary data */
- switch (opcode)
- {
- case 0: /* Fill */
- if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
- insertmix = True;
- break;
- case 8: /* Bicolour */
- colour1 = CVAL(input);
- case 3: /* Colour */
- colour2 = CVAL(input);
- break;
- case 6: /* SetMix/Mix */
- case 7: /* SetMix/FillOrMix */
- mix = CVAL(input);
- opcode -= 5;
- break;
- case 9: /* FillOrMix_1 */
- mask = 0x03;
- opcode = 0x02;
- fom_mask = 3;
- break;
- case 0x0a: /* FillOrMix_2 */
- mask = 0x05;
- opcode = 0x02;
- fom_mask = 5;
- break;
- }
- lastopcode = opcode;
- mixmask = 0;
- /* Output body */
- while (count > 0)
- {
- if (x >= width)
- {
- if (height <= 0)
- return False;
- x = 0;
- height--;
- prevline = line;
- line = output + height * width;
- }
- switch (opcode)
- {
- case 0: /* Fill */
- if (insertmix)
- {
- if (prevline == NULL)
- line[x] = mix;
- else
- line[x] = prevline[x] ^ mix;
- insertmix = False;
- count--;
- x++;
- }
- if (prevline == NULL)
- {
- REPEAT(line[x] = 0)
- }
- else
- {
- REPEAT(line[x] = prevline[x])
- }
- break;
- case 1: /* Mix */
- if (prevline == NULL)
- {
- REPEAT(line[x] = mix)
- }
- else
- {
- REPEAT(line[x] = prevline[x] ^ mix)
- }
- break;
- case 2: /* Fill or Mix */
- if (prevline == NULL)
- {
- REPEAT
- (
- MASK_UPDATE();
- if (mask & mixmask)
- line[x] = mix;
- else
- line[x] = 0;
- )
- }
- else
- {
- REPEAT
- (
- MASK_UPDATE();
- if (mask & mixmask)
- line[x] = prevline[x] ^ mix;
- else
- line[x] = prevline[x];
- )
- }
- break;
- case 3: /* Colour */
- REPEAT(line[x] = colour2)
- break;
- case 4: /* Copy */
- REPEAT(line[x] = CVAL(input))
- break;
- case 8: /* Bicolour */
- REPEAT
- (
- if (bicolour)
- {
- line[x] = colour2;
- bicolour = False;
- }
- else
- {
- line[x] = colour1;
- bicolour = True; count++;
- }
- )
- break;
- case 0xd: /* White */
- REPEAT(line[x] = 0xff)
- break;
- case 0xe: /* Black */
- REPEAT(line[x] = 0)
- break;
- default:
- unimpl("bitmap opcode 0x%x\n", opcode);
- return False;
- }
- }
- }
- return True;
-}
-
-/* 2 byte bitmap decompress */
-static BOOL
-bitmap_decompress2(uint8 * output, int width, int height, uint8 * input, int size)
-{
- uint8 *end = input + size;
- uint16 *prevline = NULL, *line = NULL;
- int opcode, count, offset, isfillormix, x = width;
- int lastopcode = -1, insertmix = False, bicolour = False;
- uint8 code;
- uint16 colour1 = 0, colour2 = 0;
- uint8 mixmask, mask = 0;
- uint16 mix = 0xffff;
- int fom_mask = 0;
-
- while (input < end)
- {
- fom_mask = 0;
- code = CVAL(input);
- opcode = code >> 4;
- /* Handle different opcode forms */
- switch (opcode)
- {
- case 0xc:
- case 0xd:
- case 0xe:
- opcode -= 6;
- count = code & 0xf;
- offset = 16;
- break;
- case 0xf:
- opcode = code & 0xf;
- if (opcode < 9)
- {
- count = CVAL(input);
- count |= CVAL(input) << 8;
- }
- else
- {
- count = (opcode < 0xb) ? 8 : 1;
- }
- offset = 0;
- break;
- default:
- opcode >>= 1;
- count = code & 0x1f;
- offset = 32;
- break;
- }
- /* Handle strange cases for counts */
- if (offset != 0)
- {
- isfillormix = ((opcode == 2) || (opcode == 7));
- if (count == 0)
- {
- if (isfillormix)
- count = CVAL(input) + 1;
- else
- count = CVAL(input) + offset;
- }
- else if (isfillormix)
- {
- count <<= 3;
- }
- }
- /* Read preliminary data */
- switch (opcode)
- {
- case 0: /* Fill */
- if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
- insertmix = True;
- break;
- case 8: /* Bicolour */
- CVAL2(input, colour1);
- case 3: /* Colour */
- CVAL2(input, colour2);
- break;
- case 6: /* SetMix/Mix */
- case 7: /* SetMix/FillOrMix */
- CVAL2(input, mix);
- opcode -= 5;
- break;
- case 9: /* FillOrMix_1 */
- mask = 0x03;
- opcode = 0x02;
- fom_mask = 3;
- break;
- case 0x0a: /* FillOrMix_2 */
- mask = 0x05;
- opcode = 0x02;
- fom_mask = 5;
- break;
- }
- lastopcode = opcode;
- mixmask = 0;
- /* Output body */
- while (count > 0)
- {
- if (x >= width)
- {
- if (height <= 0)
- return False;
- x = 0;
- height--;
- prevline = line;
- line = ((uint16 *) output) + height * width;
- }
- switch (opcode)
- {
- case 0: /* Fill */
- if (insertmix)
- {
- if (prevline == NULL)
- line[x] = mix;
- else
- line[x] = prevline[x] ^ mix;
- insertmix = False;
- count--;
- x++;
- }
- if (prevline == NULL)
- {
- REPEAT(line[x] = 0)
- }
- else
- {
- REPEAT(line[x] = prevline[x])
- }
- break;
- case 1: /* Mix */
- if (prevline == NULL)
- {
- REPEAT(line[x] = mix)
- }
- else
- {
- REPEAT(line[x] = prevline[x] ^ mix)
- }
- break;
- case 2: /* Fill or Mix */
- if (prevline == NULL)
- {
- REPEAT
- (
- MASK_UPDATE();
- if (mask & mixmask)
- line[x] = mix;
- else
- line[x] = 0;
- )
- }
- else
- {
- REPEAT
- (
- MASK_UPDATE();
- if (mask & mixmask)
- line[x] = prevline[x] ^ mix;
- else
- line[x] = prevline[x];
- )
- }
- break;
- case 3: /* Colour */
- REPEAT(line[x] = colour2)
- break;
- case 4: /* Copy */
- REPEAT(CVAL2(input, line[x]))
- break;
- case 8: /* Bicolour */
- REPEAT
- (
- if (bicolour)
- {
- line[x] = colour2;
- bicolour = False;
- }
- else
- {
- line[x] = colour1;
- bicolour = True;
- count++;
- }
- )
- break;
- case 0xd: /* White */
- REPEAT(line[x] = 0xffff)
- break;
- case 0xe: /* Black */
- REPEAT(line[x] = 0)
- break;
- default:
- unimpl("bitmap opcode 0x%x\n", opcode);
- return False;
- }
- }
- }
- return True;
-}
-
-/* 3 byte bitmap decompress */
-static BOOL
-bitmap_decompress3(uint8 * output, int width, int height, uint8 * input, int size)
-{
- uint8 *end = input + size;
- uint8 *prevline = NULL, *line = NULL;
- int opcode, count, offset, isfillormix, x = width;
- int lastopcode = -1, insertmix = False, bicolour = False;
- uint8 code;
- uint8 colour1[3] = {0, 0, 0}, colour2[3] = {0, 0, 0};
- uint8 mixmask, mask = 0;
- uint8 mix[3] = {0xff, 0xff, 0xff};
- int fom_mask = 0;
-
- while (input < end)
- {
- fom_mask = 0;
- code = CVAL(input);
- opcode = code >> 4;
- /* Handle different opcode forms */
- switch (opcode)
- {
- case 0xc:
- case 0xd:
- case 0xe:
- opcode -= 6;
- count = code & 0xf;
- offset = 16;
- break;
- case 0xf:
- opcode = code & 0xf;
- if (opcode < 9)
- {
- count = CVAL(input);
- count |= CVAL(input) << 8;
- }
- else
- {
- count = (opcode <
- 0xb) ? 8 : 1;
- }
- offset = 0;
- break;
- default:
- opcode >>= 1;
- count = code & 0x1f;
- offset = 32;
- break;
- }
- /* Handle strange cases for counts */
- if (offset != 0)
- {
- isfillormix = ((opcode == 2) || (opcode == 7));
- if (count == 0)
- {
- if (isfillormix)
- count = CVAL(input) + 1;
- else
- count = CVAL(input) + offset;
- }
- else if (isfillormix)
- {
- count <<= 3;
- }
- }
- /* Read preliminary data */
- switch (opcode)
- {
- case 0: /* Fill */
- if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
- insertmix = True;
- break;
- case 8: /* Bicolour */
- colour1[0] = CVAL(input);
- colour1[1] = CVAL(input);
- colour1[2] = CVAL(input);
- case 3: /* Colour */
- colour2[0] = CVAL(input);
- colour2[1] = CVAL(input);
- colour2[2] = CVAL(input);
- break;
- case 6: /* SetMix/Mix */
- case 7: /* SetMix/FillOrMix */
- mix[0] = CVAL(input);
- mix[1] = CVAL(input);
- mix[2] = CVAL(input);
- opcode -= 5;
- break;
- case 9: /* FillOrMix_1 */
- mask = 0x03;
- opcode = 0x02;
- fom_mask = 3;
- break;
- case 0x0a: /* FillOrMix_2 */
- mask = 0x05;
- opcode = 0x02;
- fom_mask = 5;
- break;
- }
- lastopcode = opcode;
- mixmask = 0;
- /* Output body */
- while (count > 0)
- {
- if (x >= width)
- {
- if (height <= 0)
- return False;
- x = 0;
- height--;
- prevline = line;
- line = output + height * (width * 3);
- }
- switch (opcode)
- {
- case 0: /* Fill */
- if (insertmix)
- {
- if (prevline == NULL)
- {
- line[x * 3] = mix[0];
- line[x * 3 + 1] = mix[1];
- line[x * 3 + 2] = mix[2];
- }
- else
- {
- line[x * 3] =
- prevline[x * 3] ^ mix[0];
- line[x * 3 + 1] =
- prevline[x * 3 + 1] ^ mix[1];
- line[x * 3 + 2] =
- prevline[x * 3 + 2] ^ mix[2];
- }
- insertmix = False;
- count--;
- x++;
- }
- if (prevline == NULL)
- {
- REPEAT
- (
- line[x * 3] = 0;
- line[x * 3 + 1] = 0;
- line[x * 3 + 2] = 0;
- )
- }
- else
- {
- REPEAT
- (
- line[x * 3] = prevline[x * 3];
- line[x * 3 + 1] = prevline[x * 3 + 1];
- line[x * 3 + 2] = prevline[x * 3 + 2];
- )
- }
- break;
- case 1: /* Mix */
- if (prevline == NULL)
- {
- REPEAT
- (
- line[x * 3] = mix[0];
- line[x * 3 + 1] = mix[1];
- line[x * 3 + 2] = mix[2];
- )
- }
- else
- {
- REPEAT
- (
- line[x * 3] =
- prevline[x * 3] ^ mix[0];
- line[x * 3 + 1] =
- prevline[x * 3 + 1] ^ mix[1];
- line[x * 3 + 2] =
- prevline[x * 3 + 2] ^ mix[2];
- )
- }
- break;
- case 2: /* Fill or Mix */
- if (prevline == NULL)
- {
- REPEAT
- (
- MASK_UPDATE();
- if (mask & mixmask)
- {
- line[x * 3] = mix[0];
- line[x * 3 + 1] = mix[1];
- line[x * 3 + 2] = mix[2];
- }
- else
- {
- line[x * 3] = 0;
- line[x * 3 + 1] = 0;
- line[x * 3 + 2] = 0;
- }
- )
- }
- else
- {
- REPEAT
- (
- MASK_UPDATE();
- if (mask & mixmask)
- {
- line[x * 3] =
- prevline[x * 3] ^ mix [0];
- line[x * 3 + 1] =
- prevline[x * 3 + 1] ^ mix [1];
- line[x * 3 + 2] =
- prevline[x * 3 + 2] ^ mix [2];
- }
- else
- {
- line[x * 3] =
- prevline[x * 3];
- line[x * 3 + 1] =
- prevline[x * 3 + 1];
- line[x * 3 + 2] =
- prevline[x * 3 + 2];
- }
- )
- }
- break;
- case 3: /* Colour */
- REPEAT
- (
- line[x * 3] = colour2 [0];
- line[x * 3 + 1] = colour2 [1];
- line[x * 3 + 2] = colour2 [2];
- )
- break;
- case 4: /* Copy */
- REPEAT
- (
- line[x * 3] = CVAL(input);
- line[x * 3 + 1] = CVAL(input);
- line[x * 3 + 2] = CVAL(input);
- )
- break;
- case 8: /* Bicolour */
- REPEAT
- (
- if (bicolour)
- {
- line[x * 3] = colour2[0];
- line[x * 3 + 1] = colour2[1];
- line[x * 3 + 2] = colour2[2];
- bicolour = False;
- }
- else
- {
- line[x * 3] = colour1[0];
- line[x * 3 + 1] = colour1[1];
- line[x * 3 + 2] = colour1[2];
- bicolour = True;
- count++;
- }
- )
- break;
- case 0xd: /* White */
- REPEAT
- (
- line[x * 3] = 0xff;
- line[x * 3 + 1] = 0xff;
- line[x * 3 + 2] = 0xff;
- )
- break;
- case 0xe: /* Black */
- REPEAT
- (
- line[x * 3] = 0;
- line[x * 3 + 1] = 0;
- line[x * 3 + 2] = 0;
- )
- break;
- default:
- unimpl("bitmap opcode 0x%x\n", opcode);
- return False;
- }
- }
- }
- return True;
-}
-
-#else
-
-static uint32
-cvalx(uint8 **input, int Bpp)
-{
- uint32 rv = 0;
- memcpy(&rv, *input, Bpp);
- *input += Bpp;
- return rv;
-}
-
-static void
-setli(uint8 *input, int offset, uint32 value, int Bpp)
-{
- input += offset * Bpp;
- memcpy(input, &value, Bpp);
-}
-
-static uint32
-getli(uint8 *input, int offset, int Bpp)
-{
- uint32 rv = 0;
- input += offset * Bpp;
- memcpy(&rv, input, Bpp);
- return rv;
-}
-
-static BOOL
-bitmap_decompressx(uint8 *output, int width, int height, uint8 *input, int size, int Bpp)
-{
- uint8 *end = input + size;
- uint8 *prevline = NULL, *line = NULL;
- int opcode, count, offset, isfillormix, x = width;
- int lastopcode = -1, insertmix = False, bicolour = False;
- uint8 code;
- uint32 colour1 = 0, colour2 = 0;
- uint8 mixmask, mask = 0;
- uint32 mix = 0xffffffff;
- int fom_mask = 0;
-
- while (input < end)
- {
- fom_mask = 0;
- code = CVAL(input);
- opcode = code >> 4;
-
- /* Handle different opcode forms */
- switch (opcode)
- {
- case 0xc:
- case 0xd:
- case 0xe:
- opcode -= 6;
- count = code & 0xf;
- offset = 16;
- break;
-
- case 0xf:
- opcode = code & 0xf;
- if (opcode < 9)
- {
- count = CVAL(input);
- count |= CVAL(input) << 8;
- }
- else
- {
- count = (opcode < 0xb) ? 8 : 1;
- }
- offset = 0;
- break;
-
- default:
- opcode >>= 1;
- count = code & 0x1f;
- offset = 32;
- break;
- }
-
- /* Handle strange cases for counts */
- if (offset != 0)
- {
- isfillormix = ((opcode == 2) || (opcode == 7));
-
- if (count == 0)
- {
- if (isfillormix)
- count = CVAL(input) + 1;
- else
- count = CVAL(input) + offset;
- }
- else if (isfillormix)
- {
- count <<= 3;
- }
- }
-
- /* Read preliminary data */
- switch (opcode)
- {
- case 0: /* Fill */
- if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
- insertmix = True;
- break;
- case 8: /* Bicolour */
- colour1 = cvalx(&input, Bpp);
- case 3: /* Colour */
- colour2 = cvalx(&input, Bpp);
- break;
- case 6: /* SetMix/Mix */
- case 7: /* SetMix/FillOrMix */
- mix = cvalx(&input, Bpp);
- opcode -= 5;
- break;
- case 9: /* FillOrMix_1 */
- mask = 0x03;
- opcode = 0x02;
- fom_mask = 3;
- break;
- case 0x0a: /* FillOrMix_2 */
- mask = 0x05;
- opcode = 0x02;
- fom_mask = 5;
- break;
-
- }
-
- lastopcode = opcode;
- mixmask = 0;
-
- /* Output body */
- while (count > 0)
- {
- if (x >= width)
- {
- if (height <= 0)
- return False;
-
- x = 0;
- height--;
-
- prevline = line;
- line = output + height * width * Bpp;
- }
-
- switch (opcode)
- {
- case 0: /* Fill */
- if (insertmix)
- {
- if (prevline == NULL)
- setli(line, x, mix, Bpp);
- else
- setli(line, x,
- getli(prevline, x, Bpp) ^ mix, Bpp);
-
- insertmix = False;
- count--;
- x++;
- }
-
- if (prevline == NULL)
- {
- REPEAT(setli(line, x, 0, Bpp))}
- else
- {
- REPEAT(setli
- (line, x, getli(prevline, x, Bpp), Bpp));
- }
- break;
-
- case 1: /* Mix */
- if (prevline == NULL)
- {
- REPEAT(setli(line, x, mix, Bpp));
- }
- else
- {
- REPEAT(setli
- (line, x, getli(prevline, x, Bpp) ^ mix,
- Bpp));
- }
- break;
-
- case 2: /* Fill or Mix */
- if (prevline == NULL)
- {
- REPEAT(MASK_UPDATE();
- if (mask & mixmask) setli(line, x, mix, Bpp);
- else
- setli(line, x, 0, Bpp););
- }
- else
- {
- REPEAT(MASK_UPDATE();
- if (mask & mixmask)
- setli(line, x, getli(prevline, x, Bpp) ^ mix,
- Bpp);
- else
- setli(line, x, getli(prevline, x, Bpp),
- Bpp););
- }
- break;
-
- case 3: /* Colour */
- REPEAT(setli(line, x, colour2, Bpp));
- break;
-
- case 4: /* Copy */
- REPEAT(setli(line, x, cvalx(&input, Bpp), Bpp));
- break;
-
- case 8: /* Bicolour */
- REPEAT(if (bicolour)
- {
- setli(line, x, colour2, Bpp); bicolour = False;}
- else
- {
- setli(line, x, colour1, Bpp); bicolour = True;
- count++;}
- );
- break;
-
- case 0xd: /* White */
- REPEAT(setli(line, x, 0xffffffff, Bpp));
- break;
-
- case 0xe: /* Black */
- REPEAT(setli(line, x, 0, Bpp));
- break;
-
- default:
- unimpl("bitmap opcode 0x%x\n", opcode);
- return False;
- }
- }
- }
-
- return True;
-}
-
-#endif
-
-/* main decompress function */
-BOOL
-bitmap_decompress(uint8 * output, int width, int height, uint8 * input, int size, int Bpp)
-{
-#ifdef BITMAP_SPEED_OVER_SIZE
- BOOL rv = False;
- switch (Bpp)
- {
- case 1:
- rv = bitmap_decompress1(output, width, height, input, size);
- break;
- case 2:
- rv = bitmap_decompress2(output, width, height, input, size);
- break;
- case 3:
- rv = bitmap_decompress3(output, width, height, input, size);
- break;
- }
-#else
- BOOL rv;
- rv = bitmap_decompressx(output, width, height, input, size, Bpp);
-#endif
- return rv;
-}
-
-/* *INDENT-ON* */
+/* -*- c-basic-offset: 8 -*-
+ rdesktop: A Remote Desktop Protocol client.
+ Bitmap decompression routines
+ Copyright (C) Matthew Chapman 1999-2005
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; 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 the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/* three seperate function for speed when decompressing the bitmaps */
+/* when modifing one function make the change in the others */
+/* comment out #define BITMAP_SPEED_OVER_SIZE below for one slower function */
+/* j@american-data.com */
+
+/* indent is confused by this file */
+/* *INDENT-OFF* */
+
+#include "rdesktop.h"
+#include "uimain.h"
+
+#define CVAL(p) (*(p++))
+#ifdef NEED_ALIGN
+#ifdef L_ENDIAN
+#define CVAL2(p, v) { v = (*(p++)); v |= (*(p++)) << 8; }
+#else
+#define CVAL2(p, v) { v = (*(p++)) << 8; v |= (*(p++)); }
+#endif /* L_ENDIAN */
+#else
+#define CVAL2(p, v) { v = (*((uint16*)p)); p += 2; }
+#endif /* NEED_ALIGN */
+
+#define UNROLL8(exp) { exp exp exp exp exp exp exp exp }
+
+#define REPEAT(statement) \
+{ \
+ while((count & ~0x7) && ((x+8) < width)) \
+ UNROLL8( statement; count--; x++; ); \
+ \
+ while((count > 0) && (x < width)) \
+ { \
+ statement; \
+ count--; \
+ x++; \
+ } \
+}
+
+#define MASK_UPDATE() \
+{ \
+ mixmask <<= 1; \
+ if (mixmask == 0) \
+ { \
+ mask = fom_mask ? fom_mask : CVAL(input); \
+ mixmask = 1; \
+ } \
+}
+
+/* 1 byte bitmap decompress */
+static BOOL
+bitmap_decompress1(uint8 * output, int width, int height, uint8 * input, int size)
+{
+ uint8 *end = input + size;
+ uint8 *prevline = NULL, *line = NULL;
+ int opcode, count, offset, isfillormix, x = width;
+ int lastopcode = -1, insertmix = False, bicolour = False;
+ uint8 code;
+ uint8 colour1 = 0, colour2 = 0;
+ uint8 mixmask, mask = 0;
+ uint8 mix = 0xff;
+ int fom_mask;
+
+ while (input < end)
+ {
+ fom_mask = 0;
+ code = CVAL(input);
+ opcode = code >> 4;
+ /* Handle different opcode forms */
+ switch (opcode)
+ {
+ case 0xc:
+ case 0xd:
+ case 0xe:
+ opcode -= 6;
+ count = code & 0xf;
+ offset = 16;
+ break;
+ case 0xf:
+ opcode = code & 0xf;
+ if (opcode < 9)
+ {
+ count = CVAL(input);
+ count |= CVAL(input) << 8;
+ }
+ else
+ {
+ count = (opcode < 0xb) ? 8 : 1;
+ }
+ offset = 0;
+ break;
+ default:
+ opcode >>= 1;
+ count = code & 0x1f;
+ offset = 32;
+ break;
+ }
+ /* Handle strange cases for counts */
+ if (offset != 0)
+ {
+ isfillormix = ((opcode == 2) || (opcode == 7));
+ if (count == 0)
+ {
+ if (isfillormix)
+ count = CVAL(input) + 1;
+ else
+ count = CVAL(input) + offset;
+ }
+ else if (isfillormix)
+ {
+ count <<= 3;
+ }
+ }
+ /* Read preliminary data */
+ switch (opcode)
+ {
+ case 0: /* Fill */
+ if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
+ insertmix = True;
+ break;
+ case 8: /* Bicolour */
+ colour1 = CVAL(input);
+ case 3: /* Colour */
+ colour2 = CVAL(input);
+ break;
+ case 6: /* SetMix/Mix */
+ case 7: /* SetMix/FillOrMix */
+ mix = CVAL(input);
+ opcode -= 5;
+ break;
+ case 9: /* FillOrMix_1 */
+ mask = 0x03;
+ opcode = 0x02;
+ fom_mask = 3;
+ break;
+ case 0x0a: /* FillOrMix_2 */
+ mask = 0x05;
+ opcode = 0x02;
+ fom_mask = 5;
+ break;
+ }
+ lastopcode = opcode;
+ mixmask = 0;
+ /* Output body */
+ while (count > 0)
+ {
+ if (x >= width)
+ {
+ if (height <= 0)
+ return False;
+ x = 0;
+ height--;
+ prevline = line;
+ line = output + height * width;
+ }
+ switch (opcode)
+ {
+ case 0: /* Fill */
+ if (insertmix)
+ {
+ if (prevline == NULL)
+ line[x] = mix;
+ else
+ line[x] = prevline[x] ^ mix;
+ insertmix = False;
+ count--;
+ x++;
+ }
+ if (prevline == NULL)
+ {
+ REPEAT(line[x] = 0)
+ }
+ else
+ {
+ REPEAT(line[x] = prevline[x])
+ }
+ break;
+ case 1: /* Mix */
+ if (prevline == NULL)
+ {
+ REPEAT(line[x] = mix)
+ }
+ else
+ {
+ REPEAT(line[x] = prevline[x] ^ mix)
+ }
+ break;
+ case 2: /* Fill or Mix */
+ if (prevline == NULL)
+ {
+ REPEAT
+ (
+ MASK_UPDATE();
+ if (mask & mixmask)
+ line[x] = mix;
+ else
+ line[x] = 0;
+ )
+ }
+ else
+ {
+ REPEAT
+ (
+ MASK_UPDATE();
+ if (mask & mixmask)
+ line[x] = prevline[x] ^ mix;
+ else
+ line[x] = prevline[x];
+ )
+ }
+ break;
+ case 3: /* Colour */
+ REPEAT(line[x] = colour2)
+ break;
+ case 4: /* Copy */
+ REPEAT(line[x] = CVAL(input))
+ break;
+ case 8: /* Bicolour */
+ REPEAT
+ (
+ if (bicolour)
+ {
+ line[x] = colour2;
+ bicolour = False;
+ }
+ else
+ {
+ line[x] = colour1;
+ bicolour = True; count++;
+ }
+ )
+ break;
+ case 0xd: /* White */
+ REPEAT(line[x] = 0xff)
+ break;
+ case 0xe: /* Black */
+ REPEAT(line[x] = 0)
+ break;
+ default:
+ unimpl("bitmap opcode 0x%x\n", opcode);
+ return False;
+ }
+ }
+ }
+ return True;
+}
+
+/* 2 byte bitmap decompress */
+static BOOL
+bitmap_decompress2(uint8 * output, int width, int height, uint8 * input, int size)
+{
+ uint8 *end = input + size;
+ uint16 *prevline = NULL, *line = NULL;
+ int opcode, count, offset, isfillormix, x = width;
+ int lastopcode = -1, insertmix = False, bicolour = False;
+ uint8 code;
+ uint16 colour1 = 0, colour2 = 0;
+ uint8 mixmask, mask = 0;
+ uint16 mix = 0xffff;
+ int fom_mask;
+
+ while (input < end)
+ {
+ fom_mask = 0;
+ code = CVAL(input);
+ opcode = code >> 4;
+ /* Handle different opcode forms */
+ switch (opcode)
+ {
+ case 0xc:
+ case 0xd:
+ case 0xe:
+ opcode -= 6;
+ count = code & 0xf;
+ offset = 16;
+ break;
+ case 0xf:
+ opcode = code & 0xf;
+ if (opcode < 9)
+ {
+ count = CVAL(input);
+ count |= CVAL(input) << 8;
+ }
+ else
+ {
+ count = (opcode < 0xb) ? 8 : 1;
+ }
+ offset = 0;
+ break;
+ default:
+ opcode >>= 1;
+ count = code & 0x1f;
+ offset = 32;
+ break;
+ }
+ /* Handle strange cases for counts */
+ if (offset != 0)
+ {
+ isfillormix = ((opcode == 2) || (opcode == 7));
+ if (count == 0)
+ {
+ if (isfillormix)
+ count = CVAL(input) + 1;
+ else
+ count = CVAL(input) + offset;
+ }
+ else if (isfillormix)
+ {
+ count <<= 3;
+ }
+ }
+ /* Read preliminary data */
+ switch (opcode)
+ {
+ case 0: /* Fill */
+ if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
+ insertmix = True;
+ break;
+ case 8: /* Bicolour */
+ CVAL2(input, colour1);
+ case 3: /* Colour */
+ CVAL2(input, colour2);
+ break;
+ case 6: /* SetMix/Mix */
+ case 7: /* SetMix/FillOrMix */
+ CVAL2(input, mix);
+ opcode -= 5;
+ break;
+ case 9: /* FillOrMix_1 */
+ mask = 0x03;
+ opcode = 0x02;
+ fom_mask = 3;
+ break;
+ case 0x0a: /* FillOrMix_2 */
+ mask = 0x05;
+ opcode = 0x02;
+ fom_mask = 5;
+ break;
+ }
+ lastopcode = opcode;
+ mixmask = 0;
+ /* Output body */
+ while (count > 0)
+ {
+ if (x >= width)
+ {
+ if (height <= 0)
+ return False;
+ x = 0;
+ height--;
+ prevline = line;
+ line = ((uint16 *) output) + height * width;
+ }
+ switch (opcode)
+ {
+ case 0: /* Fill */
+ if (insertmix)
+ {
+ if (prevline == NULL)
+ line[x] = mix;
+ else
+ line[x] = prevline[x] ^ mix;
+ insertmix = False;
+ count--;
+ x++;
+ }
+ if (prevline == NULL)
+ {
+ REPEAT(line[x] = 0)
+ }
+ else
+ {
+ REPEAT(line[x] = prevline[x])
+ }
+ break;
+ case 1: /* Mix */
+ if (prevline == NULL)
+ {
+ REPEAT(line[x] = mix)
+ }
+ else
+ {
+ REPEAT(line[x] = prevline[x] ^ mix)
+ }
+ break;
+ case 2: /* Fill or Mix */
+ if (prevline == NULL)
+ {
+ REPEAT
+ (
+ MASK_UPDATE();
+ if (mask & mixmask)
+ line[x] = mix;
+ else
+ line[x] = 0;
+ )
+ }
+ else
+ {
+ REPEAT
+ (
+ MASK_UPDATE();
+ if (mask & mixmask)
+ line[x] = prevline[x] ^ mix;
+ else
+ line[x] = prevline[x];
+ )
+ }
+ break;
+ case 3: /* Colour */
+ REPEAT(line[x] = colour2)
+ break;
+ case 4: /* Copy */
+ REPEAT(CVAL2(input, line[x]))
+ break;
+ case 8: /* Bicolour */
+ REPEAT
+ (
+ if (bicolour)
+ {
+ line[x] = colour2;
+ bicolour = False;
+ }
+ else
+ {
+ line[x] = colour1;
+ bicolour = True;
+ count++;
+ }
+ )
+ break;
+ case 0xd: /* White */
+ REPEAT(line[x] = 0xffff)
+ break;
+ case 0xe: /* Black */
+ REPEAT(line[x] = 0)
+ break;
+ default:
+ unimpl("bitmap opcode 0x%x\n", opcode);
+ return False;
+ }
+ }
+ }
+ return True;
+}
+
+/* 3 byte bitmap decompress */
+static BOOL
+bitmap_decompress3(uint8 * output, int width, int height, uint8 * input, int size)
+{
+ uint8 *end = input + size;
+ uint8 *prevline = NULL, *line = NULL;
+ int opcode, count, offset, isfillormix, x = width;
+ int lastopcode = -1, insertmix = False, bicolour = False;
+ uint8 code;
+ uint8 colour1[3] = {0, 0, 0}, colour2[3] = {0, 0, 0};
+ uint8 mixmask, mask = 0;
+ uint8 mix[3] = {0xff, 0xff, 0xff};
+ int fom_mask;
+
+ while (input < end)
+ {
+ fom_mask = 0;
+ code = CVAL(input);
+ opcode = code >> 4;
+ /* Handle different opcode forms */
+ switch (opcode)
+ {
+ case 0xc:
+ case 0xd:
+ case 0xe:
+ opcode -= 6;
+ count = code & 0xf;
+ offset = 16;
+ break;
+ case 0xf:
+ opcode = code & 0xf;
+ if (opcode < 9)
+ {
+ count = CVAL(input);
+ count |= CVAL(input) << 8;
+ }
+ else
+ {
+ count = (opcode <
+ 0xb) ? 8 : 1;
+ }
+ offset = 0;
+ break;
+ default:
+ opcode >>= 1;
+ count = code & 0x1f;
+ offset = 32;
+ break;
+ }
+ /* Handle strange cases for counts */
+ if (offset != 0)
+ {
+ isfillormix = ((opcode == 2) || (opcode == 7));
+ if (count == 0)
+ {
+ if (isfillormix)
+ count = CVAL(input) + 1;
+ else
+ count = CVAL(input) + offset;
+ }
+ else if (isfillormix)
+ {
+ count <<= 3;
+ }
+ }
+ /* Read preliminary data */
+ switch (opcode)
+ {
+ case 0: /* Fill */
+ if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
+ insertmix = True;
+ break;
+ case 8: /* Bicolour */
+ colour1[0] = CVAL(input);
+ colour1[1] = CVAL(input);
+ colour1[2] = CVAL(input);
+ case 3: /* Colour */
+ colour2[0] = CVAL(input);
+ colour2[1] = CVAL(input);
+ colour2[2] = CVAL(input);
+ break;
+ case 6: /* SetMix/Mix */
+ case 7: /* SetMix/FillOrMix */
+ mix[0] = CVAL(input);
+ mix[1] = CVAL(input);
+ mix[2] = CVAL(input);
+ opcode -= 5;
+ break;
+ case 9: /* FillOrMix_1 */
+ mask = 0x03;
+ opcode = 0x02;
+ fom_mask = 3;
+ break;
+ case 0x0a: /* FillOrMix_2 */
+ mask = 0x05;
+ opcode = 0x02;
+ fom_mask = 5;
+ break;
+ }
+ lastopcode = opcode;
+ mixmask = 0;
+ /* Output body */
+ while (count > 0)
+ {
+ if (x >= width)
+ {
+ if (height <= 0)
+ return False;
+ x = 0;
+ height--;
+ prevline = line;
+ line = output + height * (width * 3);
+ }
+ switch (opcode)
+ {
+ case 0: /* Fill */
+ if (insertmix)
+ {
+ if (prevline == NULL)
+ {
+ line[x * 3] = mix[0];
+ line[x * 3 + 1] = mix[1];
+ line[x * 3 + 2] = mix[2];
+ }
+ else
+ {
+ line[x * 3] =
+ prevline[x * 3] ^ mix[0];
+ line[x * 3 + 1] =
+ prevline[x * 3 + 1] ^ mix[1];
+ line[x * 3 + 2] =
+ prevline[x * 3 + 2] ^ mix[2];
+ }
+ insertmix = False;
+ count--;
+ x++;
+ }
+ if (prevline == NULL)
+ {
+ REPEAT
+ (
+ line[x * 3] = 0;
+ line[x * 3 + 1] = 0;
+ line[x * 3 + 2] = 0;
+ )
+ }
+ else
+ {
+ REPEAT
+ (
+ line[x * 3] = prevline[x * 3];
+ line[x * 3 + 1] = prevline[x * 3 + 1];
+ line[x * 3 + 2] = prevline[x * 3 + 2];
+ )
+ }
+ break;
+ case 1: /* Mix */
+ if (prevline == NULL)
+ {
+ REPEAT
+ (
+ line[x * 3] = mix[0];
+ line[x * 3 + 1] = mix[1];
+ line[x * 3 + 2] = mix[2];
+ )
+ }
+ else
+ {
+ REPEAT
+ (
+ line[x * 3] =
+ prevline[x * 3] ^ mix[0];
+ line[x * 3 + 1] =
+ prevline[x * 3 + 1] ^ mix[1];
+ line[x * 3 + 2] =
+ prevline[x * 3 + 2] ^ mix[2];
+ )
+ }
+ break;
+ case 2: /* Fill or Mix */
+ if (prevline == NULL)
+ {
+ REPEAT
+ (
+ MASK_UPDATE();
+ if (mask & mixmask)
+ {
+ line[x * 3] = mix[0];
+ line[x * 3 + 1] = mix[1];
+ line[x * 3 + 2] = mix[2];
+ }
+ else
+ {
+ line[x * 3] = 0;
+ line[x * 3 + 1] = 0;
+ line[x * 3 + 2] = 0;
+ }
+ )
+ }
+ else
+ {
+ REPEAT
+ (
+ MASK_UPDATE();
+ if (mask & mixmask)
+ {
+ line[x * 3] =
+ prevline[x * 3] ^ mix [0];
+ line[x * 3 + 1] =
+ prevline[x * 3 + 1] ^ mix [1];
+ line[x * 3 + 2] =
+ prevline[x * 3 + 2] ^ mix [2];
+ }
+ else
+ {
+ line[x * 3] =
+ prevline[x * 3];
+ line[x * 3 + 1] =
+ prevline[x * 3 + 1];
+ line[x * 3 + 2] =
+ prevline[x * 3 + 2];
+ }
+ )
+ }
+ break;
+ case 3: /* Colour */
+ REPEAT
+ (
+ line[x * 3] = colour2 [0];
+ line[x * 3 + 1] = colour2 [1];
+ line[x * 3 + 2] = colour2 [2];
+ )
+ break;
+ case 4: /* Copy */
+ REPEAT
+ (
+ line[x * 3] = CVAL(input);
+ line[x * 3 + 1] = CVAL(input);
+ line[x * 3 + 2] = CVAL(input);
+ )
+ break;
+ case 8: /* Bicolour */
+ REPEAT
+ (
+ if (bicolour)
+ {
+ line[x * 3] = colour2[0];
+ line[x * 3 + 1] = colour2[1];
+ line[x * 3 + 2] = colour2[2];
+ bicolour = False;
+ }
+ else
+ {
+ line[x * 3] = colour1[0];
+ line[x * 3 + 1] = colour1[1];
+ line[x * 3 + 2] = colour1[2];
+ bicolour = True;
+ count++;
+ }
+ )
+ break;
+ case 0xd: /* White */
+ REPEAT
+ (
+ line[x * 3] = 0xff;
+ line[x * 3 + 1] = 0xff;
+ line[x * 3 + 2] = 0xff;
+ )
+ break;
+ case 0xe: /* Black */
+ REPEAT
+ (
+ line[x * 3] = 0;
+ line[x * 3 + 1] = 0;
+ line[x * 3 + 2] = 0;
+ )
+ break;
+ default:
+ unimpl("bitmap opcode 0x%x\n", opcode);
+ return False;
+ }
+ }
+ }
+ return True;
+}
+
+/* main decompress function */
+BOOL
+bitmap_decompress(uint8 * output, int width, int height, uint8 * input, int size, int Bpp)
+{
+ BOOL rv = False;
+ switch (Bpp)
+ {
+ case 1:
+ rv = bitmap_decompress1(output, width, height, input, size);
+ break;
+ case 2:
+ rv = bitmap_decompress2(output, width, height, input, size);
+ break;
+ case 3:
+ rv = bitmap_decompress3(output, width, height, input, size);
+ break;
+ }
+ return rv;
+}
+
+/* 2 byte bitmap decompress */
+static BOOL
+bitmap_decompress_ex_16_to_32(uint8 * output, int width, int height, uint8 * input, int size)
+{
+ uint8 * end = input + size;
+ int * prevline = NULL, * line = NULL;
+ int opcode, count, offset, isfillormix, x = width;
+ int lastopcode = -1, insertmix = False, bicolour = False;
+ uint8 code;
+ int colour1 = 0, colour2 = 0;
+ uint8 mixmask, mask = 0;
+ int mix = 0xffffff;
+ int fom_mask;
+ int p, r, g, b;
+
+ while (input < end)
+ {
+ fom_mask = 0;
+ code = CVAL(input);
+ opcode = code >> 4;
+ /* Handle different opcode forms */
+ switch (opcode)
+ {
+ case 0xc:
+ case 0xd:
+ case 0xe:
+ opcode -= 6;
+ count = code & 0xf;
+ offset = 16;
+ break;
+ case 0xf:
+ opcode = code & 0xf;
+ if (opcode < 9)
+ {
+ count = CVAL(input);
+ count |= CVAL(input) << 8;
+ }
+ else
+ {
+ count = (opcode < 0xb) ? 8 : 1;
+ }
+ offset = 0;
+ break;
+ default:
+ opcode >>= 1;
+ count = code & 0x1f;
+ offset = 32;
+ break;
+ }
+ /* Handle strange cases for counts */
+ if (offset != 0)
+ {
+ isfillormix = ((opcode == 2) || (opcode == 7));
+ if (count == 0)
+ {
+ if (isfillormix)
+ {
+ count = CVAL(input) + 1;
+ }
+ else
+ {
+ count = CVAL(input) + offset;
+ }
+ }
+ else if (isfillormix)
+ {
+ count <<= 3;
+ }
+ }
+ /* Read preliminary data */
+ switch (opcode)
+ {
+ case 0: /* Fill */
+ if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
+ {
+ insertmix = True;
+ }
+ break;
+ case 8: /* Bicolour */
+ CVAL2(input, p);
+ SPLIT_COLOUR16(p, r, g, b);
+ MAKE_COLOUR32(p, r, g, b);
+ colour1 = p;
+ case 3: /* Colour */
+ CVAL2(input, p);
+ SPLIT_COLOUR16(p, r, g, b);
+ MAKE_COLOUR32(p, r, g, b);
+ colour2 = p;
+ break;
+ case 6: /* SetMix/Mix */
+ case 7: /* SetMix/FillOrMix */
+ CVAL2(input, p);
+ SPLIT_COLOUR16(p, r, g, b);
+ MAKE_COLOUR32(p, r, g, b);
+ mix = p;
+ opcode -= 5;
+ break;
+ case 9: /* FillOrMix_1 */
+ mask = 0x03;
+ opcode = 0x02;
+ fom_mask = 3;
+ break;
+ case 0x0a: /* FillOrMix_2 */
+ mask = 0x05;
+ opcode = 0x02;
+ fom_mask = 5;
+ break;
+ }
+ lastopcode = opcode;
+ mixmask = 0;
+ /* Output body */
+ while (count > 0)
+ {
+ if (x >= width)
+ {
+ if (height <= 0)
+ {
+ return False;
+ }
+ x = 0;
+ height--;
+ prevline = line;
+ line = ((int *) output) + height * width;
+ }
+ switch (opcode)
+ {
+ case 0: /* Fill */
+ if (insertmix)
+ {
+ if (prevline == NULL)
+ {
+ line[x] = mix;
+ }
+ else
+ {
+ line[x] = prevline[x] ^ mix;
+ }
+ insertmix = False;
+ count--;
+ x++;
+ }
+ if (prevline == NULL)
+ {
+ REPEAT(line[x] = 0)
+ }
+ else
+ {
+ REPEAT(line[x] = prevline[x])
+ }
+ break;
+ case 1: /* Mix */
+ if (prevline == NULL)
+ {
+ REPEAT(line[x] = mix)
+ }
+ else
+ {
+ REPEAT(line[x] = prevline[x] ^ mix)
+ }
+ break;
+ case 2: /* Fill or Mix */
+ if (prevline == NULL)
+ {
+ REPEAT
+ (
+ MASK_UPDATE();
+ if (mask & mixmask)
+ {
+ line[x] = mix;
+ }
+ else
+ {
+ line[x] = 0;
+ }
+ )
+ }
+ else
+ {
+ REPEAT
+ (
+ MASK_UPDATE();
+ if (mask & mixmask)
+ {
+ line[x] = prevline[x] ^ mix;
+ }
+ else
+ {
+ line[x] = prevline[x];
+ }
+ )
+ }
+ break;
+ case 3: /* Colour */
+ REPEAT(line[x] = colour2)
+ break;
+ case 4: /* Copy */
+ REPEAT
+ (
+ CVAL2(input, p);
+ SPLIT_COLOUR16(p, r, g, b);
+ MAKE_COLOUR32(p, r, g, b);
+ line[x] = p;
+ )
+ break;
+ case 8: /* Bicolour */
+ REPEAT
+ (
+ if (bicolour)
+ {
+ line[x] = colour2;
+ bicolour = False;
+ }
+ else
+ {
+ line[x] = colour1;
+ bicolour = True;
+ count++;
+ }
+ )
+ break;
+ case 0xd: /* White */
+ REPEAT(line[x] = 0xffffff)
+ break;
+ case 0xe: /* Black */
+ REPEAT(line[x] = 0)
+ break;
+ default:
+ unimpl("bitmap opcode 0x%x\n", opcode);
+ return False;
+ }
+ }
+ }
+ return True;
+}
+
+/* 3 byte bitmap decompress */
+static BOOL
+bitmap_decompress_ex_24_to_32(uint8 * output, int width, int height, uint8 * input, int size)
+{
+ uint8 * end = input + size;
+ int * prevline = NULL, * line = NULL;
+ int opcode, count, offset, isfillormix, x = width;
+ int lastopcode = -1, insertmix = False, bicolour = False;
+ uint8 code;
+ int colour1 = 0, colour2 = 0;
+ uint8 mixmask, mask = 0;
+ int mix = 0xffffff;
+ int fom_mask;
+ int p, r, g, b;
+
+ while (input < end)
+ {
+ fom_mask = 0;
+ code = CVAL(input);
+ opcode = code >> 4;
+ /* Handle different opcode forms */
+ switch (opcode)
+ {
+ case 0xc:
+ case 0xd:
+ case 0xe:
+ opcode -= 6;
+ count = code & 0xf;
+ offset = 16;
+ break;
+ case 0xf:
+ opcode = code & 0xf;
+ if (opcode < 9)
+ {
+ count = CVAL(input);
+ count |= CVAL(input) << 8;
+ }
+ else
+ {
+ count = (opcode <
+ 0xb) ? 8 : 1;
+ }
+ offset = 0;
+ break;
+ default:
+ opcode >>= 1;
+ count = code & 0x1f;
+ offset = 32;
+ break;
+ }
+ /* Handle strange cases for counts */
+ if (offset != 0)
+ {
+ isfillormix = ((opcode == 2) || (opcode == 7));
+ if (count == 0)
+ {
+ if (isfillormix)
+ count = CVAL(input) + 1;
+ else
+ count = CVAL(input) + offset;
+ }
+ else if (isfillormix)
+ {
+ count <<= 3;
+ }
+ }
+ /* Read preliminary data */
+ switch (opcode)
+ {
+ case 0: /* Fill */
+ if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
+ insertmix = True;
+ break;
+ case 8: /* Bicolour */
+ b = CVAL(input);
+ g = CVAL(input);
+ r = CVAL(input);
+ MAKE_COLOUR32(p, r, g, b);
+ colour1 = p;
+ case 3: /* Colour */
+ b = CVAL(input);
+ g = CVAL(input);
+ r = CVAL(input);
+ MAKE_COLOUR32(p, r, g, b);
+ colour2 = p;
+ break;
+ case 6: /* SetMix/Mix */
+ case 7: /* SetMix/FillOrMix */
+ b = CVAL(input);
+ g = CVAL(input);
+ r = CVAL(input);
+ MAKE_COLOUR32(p, r, g, b);
+ mix = p;
+ opcode -= 5;
+ break;
+ case 9: /* FillOrMix_1 */
+ mask = 0x03;
+ opcode = 0x02;
+ fom_mask = 3;
+ break;
+ case 0x0a: /* FillOrMix_2 */
+ mask = 0x05;
+ opcode = 0x02;
+ fom_mask = 5;
+ break;
+ }
+ lastopcode = opcode;
+ mixmask = 0;
+ /* Output body */
+ while (count > 0)
+ {
+ if (x >= width)
+ {
+ if (height <= 0)
+ return False;
+ x = 0;
+ height--;
+ prevline = line;
+ line = ((int *) output) + height * width;
+ }
+ switch (opcode)
+ {
+ case 0: /* Fill */
+ if (insertmix)
+ {
+ if (prevline == NULL)
+ {
+ line[x] = mix;
+ }
+ else
+ {
+ line[x] = prevline[x] ^ mix;
+ }
+ insertmix = False;
+ count--;
+ x++;
+ }
+ if (prevline == NULL)
+ {
+ REPEAT(line[x] = 0)
+ }
+ else
+ {
+ REPEAT(line[x] = prevline[x])
+ }
+ break;
+ case 1: /* Mix */
+ if (prevline == NULL)
+ {
+ REPEAT(line[x] = mix)
+ }
+ else
+ {
+ REPEAT(line[x] = prevline[x] ^ mix)
+ }
+ break;
+ case 2: /* Fill or Mix */
+ if (prevline == NULL)
+ {
+ REPEAT
+ (
+ MASK_UPDATE();
+ if (mask & mixmask)
+ {
+ line[x] = mix;
+ }
+ else
+ {
+ line[x] = 0;
+ }
+ )
+ }
+ else
+ {
+ REPEAT
+ (
+ MASK_UPDATE();
+ if (mask & mixmask)
+ {
+ line[x] = prevline[x] ^ mix;
+ }
+ else
+ {
+ line[x] = prevline[x];
+ }
+ )
+ }
+ break;
+ case 3: /* Colour */
+ REPEAT(line[x] = colour2)
+ break;
+ case 4: /* Copy */
+ REPEAT
+ (
+ b = CVAL(input);
+ g = CVAL(input);
+ r = CVAL(input);
+ MAKE_COLOUR32(p, r, g, b);
+ line[x] = p;
+ )
+ break;
+ case 8: /* Bicolour */
+ REPEAT
+ (
+ if (bicolour)
+ {
+ line[x] = colour2;
+ bicolour = False;
+ }
+ else
+ {
+ line[x] = colour1;
+ bicolour = True;
+ count++;
+ }
+ )
+ break;
+ case 0xd: /* White */
+ REPEAT(line[x] = 0xffffff);
+ break;
+ case 0xe: /* Black */
+ REPEAT(line[x] = 0);
+ break;
+ default:
+ unimpl("bitmap opcode 0x%x\n", opcode);
+ return False;
+ }
+ }
+ }
+ return True;
+}
+
+BOOL
+bitmap_decompress_ex(uint8 * output, int width, int height, uint8 * input, int size,
+ int in_bpp, int out_bpp)
+{
+ if (in_bpp == 16 && out_bpp == 32)
+ {
+ return bitmap_decompress_ex_16_to_32(output, width, height, input, size);
+ }
+ else if (in_bpp == 24 && out_bpp == 32)
+ {
+ return bitmap_decompress_ex_24_to_32(output, width, height, input, size);
+ }
+ return False;
+}
+
+/* *INDENT-ON* */
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-24 23:51:27 +0000