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reactos/base/applications/mstsc/bitmap.c

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/* -*- c-basic-offset: 8 -*-
rdesktop: A Remote Desktop Protocol client.
Bitmap decompression routines
Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 1999-2008
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 3 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, see <http://www.gnu.org/licenses/>.
*/
/* three separate function for speed when decompressing the bitmaps
when modifying one function make the change in the others
jay.sorg@gmail.com */
/* indent is confused by this file */
/* *INDENT-OFF* */
#include "precomp.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 RD_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 RD_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 RD_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;
}
/* decompress a colour plane */
static int
process_plane(uint8 * in, int width, int height, uint8 * out, int size)
{
int indexw;
int indexh;
int code;
int collen;
int replen;
int color;
int x;
int revcode;
uint8 * last_line;
uint8 * this_line;
uint8 * org_in;
uint8 * org_out;
org_in = in;
org_out = out;
last_line = 0;
indexh = 0;
while (indexh < height)
{
out = (org_out + width * height * 4) - ((indexh + 1) * width * 4);
color = 0;
this_line = out;
indexw = 0;
if (last_line == 0)
{
while (indexw < width)
{
code = CVAL(in);
replen = code & 0xf;
collen = (code >> 4) & 0xf;
revcode = (replen << 4) | collen;
if ((revcode <= 47) && (revcode >= 16))
{
replen = revcode;
collen = 0;
}
while (collen > 0)
{
color = CVAL(in);
*out = color;
out += 4;
indexw++;
collen--;
}
while (replen > 0)
{
*out = color;
out += 4;
indexw++;
replen--;
}
}
}
else
{
while (indexw < width)
{
code = CVAL(in);
replen = code & 0xf;
collen = (code >> 4) & 0xf;
revcode = (replen << 4) | collen;
if ((revcode <= 47) && (revcode >= 16))
{
replen = revcode;
collen = 0;
}
while (collen > 0)
{
x = CVAL(in);
if (x & 1)
{
x = x >> 1;
x = x + 1;
color = -x;
}
else
{
x = x >> 1;
color = x;
}
x = last_line[indexw * 4] + color;
*out = x;
out += 4;
indexw++;
collen--;
}
while (replen > 0)
{
x = last_line[indexw * 4] + color;
*out = x;
out += 4;
indexw++;
replen--;
}
}
}
indexh++;
last_line = this_line;
}
return (int) (in - org_in);
}
/* 4 byte bitmap decompress */
static RD_BOOL
bitmap_decompress4(uint8 * output, int width, int height, uint8 * input, int size)
{
int code;
int bytes_pro;
int total_pro;
code = CVAL(input);
if (code != 0x10)
{
return False;
}
total_pro = 1;
bytes_pro = process_plane(input, width, height, output + 3, size - total_pro);
total_pro += bytes_pro;
input += bytes_pro;
bytes_pro = process_plane(input, width, height, output + 2, size - total_pro);
total_pro += bytes_pro;
input += bytes_pro;
bytes_pro = process_plane(input, width, height, output + 1, size - total_pro);
total_pro += bytes_pro;
input += bytes_pro;
bytes_pro = process_plane(input, width, height, output + 0, size - total_pro);
total_pro += bytes_pro;
return size == total_pro;
}
/* main decompress function */
RD_BOOL
bitmap_decompress(uint8 * output, int width, int height, uint8 * input, int size, int Bpp)
{
RD_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;
case 4:
rv = bitmap_decompress4(output, width, height, input, size);
break;
default:
unimpl("Bpp %d\n", Bpp);
break;
}
return rv;
}
/* *INDENT-ON* */
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