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reactos/rosapps/applications/net/tsclient/rdesktop/bitmap.c
Gregor Schneider 23df1a2f4b Move tsclient to rosapps (not included in build process and superseded by Geds mstsc implementation) [1/2] 
svn path=/trunk/; revision=44365
2009-12-02 18:58:05 +00:00

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/* -*- 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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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;
int opcode, count, offset, isfillormix;
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;
#if 0
uint8 *line = NULL;
int x = width;
#else
uint8 *line = output;
int x = 0;
int y = 0;
#endif
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 0
if (height <= 0)
#else
if (y >= height)
#endif
return False;
x = 0;
#if 0
height--;
#else
y ++;
#endif
prevline = line;
#if 0
line = output + height * width;
#else
line = output + y * width;
#endif
}
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;
int opcode, count, offset, isfillormix;
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;
#if 0
uint8 *line = NULL;
int x = width;
#else
uint8 *line = output;
int x = 0;
int y = 0;
#endif
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 0
if (height <= 0)
#else
if (y >= height)
#endif
return False;
x = 0;
#if 0
height--;
#else
y ++;
#endif
prevline = line;
#if 0
line = ((uint16 *) output) + height * width;
#else
line = ((uint16 *) output) + y * width;
#endif
}
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;
int opcode, count, offset, isfillormix;
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;
#if 0
uint8 *line = NULL;
int x = width;
#else
uint8 *line = output;
int x = 0;
int y = 0;
#endif
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 0
if (height <= 0)
#else
if (y >= height)
#endif
return False;
x = 0;
#if 0
height--;
#else
y ++;
#endif
prevline = line;
#if 0
line = output + height * (width * 3);
#else
line = output + y * (width * 3);
#endif
}
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;
int opcode, count, offset, isfillormix;
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;
#if 0
uint8 *line = NULL;
int x = width;
#else
uint8 *line = output;
int x = 0;
int y = 0;
#endif
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 0
if (height <= 0)
#else
if (y >= height)
#endif
return False;
x = 0;
#if 0
height--;
#else
y ++;
#endif
prevline = line;
#if 0
line = output + height * width * Bpp;
#else
line = output + y * width * Bpp;
#endif
}
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* */
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