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/* |
/* -*- c-basic-offset: 8 -*- |
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rdesktop: A Remote Desktop Protocol client. |
rdesktop: A Remote Desktop Protocol client. |
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Bitmap decompression routines |
Bitmap decompression routines |
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Copyright (C) Matthew Chapman 1999-2002 |
Copyright (C) Matthew Chapman 1999-2002 |
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This program is free software; you can redistribute it and/or modify |
This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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#define CVAL(p) (*(p++)) |
#define CVAL(p) (*(p++)) |
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static uint32 |
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cvalx(unsigned char **input, int Bpp) |
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{ |
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uint32 rv = 0; |
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memcpy(&rv, *input, Bpp); |
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*input += Bpp; |
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return rv; |
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} |
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static void |
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setli(unsigned char *input, int offset, uint32 value, int Bpp) |
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{ |
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input += offset * Bpp; |
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memcpy(input, &value, Bpp); |
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} |
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static uint32 |
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getli(unsigned char *input, int offset, int Bpp) |
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{ |
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uint32 rv = 0; |
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input += offset * Bpp; |
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memcpy(&rv, input, Bpp); |
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return rv; |
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} |
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#define UNROLL8(exp) { exp exp exp exp exp exp exp exp } |
#define UNROLL8(exp) { exp exp exp exp exp exp exp exp } |
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#define REPEAT(statement) \ |
#define REPEAT(statement) \ |
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} |
} |
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BOOL |
BOOL |
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bitmap_decompress(unsigned char *output, int width, int height, unsigned char *input, int size) |
bitmap_decompress(unsigned char *output, int width, int height, unsigned char *input, int size, |
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|
int Bpp) |
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{ |
{ |
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unsigned char *end = input + size; |
unsigned char *end = input + size; |
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unsigned char *prevline = NULL, *line = NULL; |
unsigned char *prevline = NULL, *line = NULL; |
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int opcode, count, offset, isfillormix, x = width; |
int opcode, count, offset, isfillormix, x = width; |
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int lastopcode = -1, insertmix = False, bicolour = False; |
int lastopcode = -1, insertmix = False, bicolour = False; |
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uint8 code, colour1 = 0, colour2 = 0; |
uint8 code; |
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uint8 mixmask, mask = 0, mix = 0xff; |
uint32 colour1 = 0, colour2 = 0; |
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uint8 mixmask, mask = 0; |
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uint32 mix = 0xffffffff; |
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int fom_mask = 0; |
int fom_mask = 0; |
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|
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while (input < end) |
while (input < end) |
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insertmix = True; |
insertmix = True; |
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break; |
break; |
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case 8: /* Bicolour */ |
case 8: /* Bicolour */ |
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colour1 = CVAL(input); |
colour1 = cvalx(&input, Bpp); |
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case 3: /* Colour */ |
case 3: /* Colour */ |
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colour2 = CVAL(input); |
colour2 = cvalx(&input, Bpp); |
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break; |
break; |
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case 6: /* SetMix/Mix */ |
case 6: /* SetMix/Mix */ |
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case 7: /* SetMix/FillOrMix */ |
case 7: /* SetMix/FillOrMix */ |
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mix = CVAL(input); |
mix = cvalx(&input, Bpp); |
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opcode -= 5; |
opcode -= 5; |
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break; |
break; |
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case 9: /* FillOrMix_1 */ |
case 9: /* FillOrMix_1 */ |
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height--; |
height--; |
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prevline = line; |
prevline = line; |
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line = output + height * width; |
line = output + height * width * Bpp; |
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} |
} |
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switch (opcode) |
switch (opcode) |
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if (insertmix) |
if (insertmix) |
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{ |
{ |
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if (prevline == NULL) |
if (prevline == NULL) |
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line[x] = mix; |
setli(line, x, mix, Bpp); |
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else |
else |
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line[x] = prevline[x] ^ mix; |
setli(line, x, |
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getli(prevline, x, Bpp) ^ mix, Bpp); |
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insertmix = False; |
insertmix = False; |
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count--; |
count--; |
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if (prevline == NULL) |
if (prevline == NULL) |
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{ |
{ |
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REPEAT(line[x] = 0); |
REPEAT(setli(line, x, 0, Bpp))} |
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} |
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else |
else |
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{ |
{ |
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REPEAT(line[x] = prevline[x]); |
REPEAT(setli |
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(line, x, getli(prevline, x, Bpp), Bpp)); |
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} |
} |
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break; |
break; |
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case 1: /* Mix */ |
case 1: /* Mix */ |
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if (prevline == NULL) |
if (prevline == NULL) |
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{ |
{ |
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REPEAT(line[x] = mix); |
REPEAT(setli(line, x, mix, Bpp)); |
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} |
} |
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else |
else |
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{ |
{ |
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REPEAT(line[x] = prevline[x] ^ mix); |
REPEAT(setli |
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(line, x, getli(prevline, x, Bpp) ^ mix, |
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Bpp)); |
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} |
} |
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break; |
break; |
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|
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if (prevline == NULL) |
if (prevline == NULL) |
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{ |
{ |
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REPEAT(MASK_UPDATE(); |
REPEAT(MASK_UPDATE(); |
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if (mask & mixmask) line[x] = mix; |
if (mask & mixmask) setli(line, x, mix, Bpp); |
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else |
else |
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line[x] = 0;); |
setli(line, x, 0, Bpp);); |
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} |
} |
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else |
else |
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{ |
{ |
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REPEAT(MASK_UPDATE(); |
REPEAT(MASK_UPDATE(); |
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if (mask & mixmask) |
if (mask & mixmask) |
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line[x] = prevline[x] ^ mix; |
setli(line, x, getli(prevline, x, Bpp) ^ mix, |
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Bpp); |
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else |
else |
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line[x] = prevline[x];); |
setli(line, x, getli(prevline, x, Bpp), |
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Bpp);); |
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} |
} |
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break; |
break; |
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case 3: /* Colour */ |
case 3: /* Colour */ |
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REPEAT(line[x] = colour2); |
REPEAT(setli(line, x, colour2, Bpp)); |
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break; |
break; |
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case 4: /* Copy */ |
case 4: /* Copy */ |
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REPEAT(line[x] = CVAL(input)); |
REPEAT(setli(line, x, cvalx(&input, Bpp), Bpp)); |
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break; |
break; |
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case 8: /* Bicolour */ |
case 8: /* Bicolour */ |
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REPEAT(if (bicolour) |
REPEAT(if (bicolour) |
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{ |
{ |
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line[x] = colour2; bicolour = False;} |
setli(line, x, colour2, Bpp); bicolour = False;} |
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else |
else |
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{ |
{ |
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line[x] = colour1; bicolour = True; count++;} |
setli(line, x, colour1, Bpp); bicolour = True; |
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count++;} |
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); |
); |
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break; |
break; |
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case 0xd: /* White */ |
case 0xd: /* White */ |
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REPEAT(line[x] = 0xff); |
REPEAT(setli(line, x, 0xffffffff, Bpp)); |
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break; |
break; |
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case 0xe: /* Black */ |
case 0xe: /* Black */ |
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REPEAT(line[x] = 0x00); |
REPEAT(setli(line, x, 0, Bpp)); |
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break; |
break; |
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default: |
default: |