455 lines
10 KiB
C
455 lines
10 KiB
C
/**
|
|
* FreeRDP: A Remote Desktop Protocol Client
|
|
* Compressed Bitmap
|
|
*
|
|
* Copyright 2011 Jay Sorg <jay.sorg@gmail.com>
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
/*
|
|
RLE Compressed Bitmap Stream (RLE_BITMAP_STREAM)
|
|
http://msdn.microsoft.com/en-us/library/cc240895%28v=prot.10%29.aspx
|
|
pseudo-code
|
|
http://msdn.microsoft.com/en-us/library/dd240593%28v=prot.10%29.aspx
|
|
*/
|
|
|
|
#include <freerdp/utils/stream.h>
|
|
#include <freerdp/utils/memory.h>
|
|
|
|
#define REGULAR_BG_RUN 0x0
|
|
#define MEGA_MEGA_BG_RUN 0xF0
|
|
#define REGULAR_FG_RUN 0x1
|
|
#define MEGA_MEGA_FG_RUN 0xF1
|
|
#define LITE_SET_FG_FG_RUN 0xC
|
|
#define MEGA_MEGA_SET_FG_RUN 0xF6
|
|
#define LITE_DITHERED_RUN 0xE
|
|
#define MEGA_MEGA_DITHERED_RUN 0xF8
|
|
#define REGULAR_COLOR_RUN 0x3
|
|
#define MEGA_MEGA_COLOR_RUN 0xF3
|
|
#define REGULAR_FGBG_IMAGE 0x2
|
|
#define MEGA_MEGA_FGBG_IMAGE 0xF2
|
|
#define LITE_SET_FG_FGBG_IMAGE 0xD
|
|
#define MEGA_MEGA_SET_FGBG_IMAGE 0xF7
|
|
#define REGULAR_COLOR_IMAGE 0x4
|
|
#define MEGA_MEGA_COLOR_IMAGE 0xF4
|
|
#define SPECIAL_FGBG_1 0xF9
|
|
#define SPECIAL_FGBG_2 0xFA
|
|
#define SPECIAL_WHITE 0xFD
|
|
#define SPECIAL_BLACK 0xFE
|
|
|
|
/*
|
|
Bitmasks
|
|
*/
|
|
static uint8 g_MaskBit0 = 0x01; /* Least significant bit */
|
|
static uint8 g_MaskBit1 = 0x02;
|
|
static uint8 g_MaskBit2 = 0x04;
|
|
static uint8 g_MaskBit3 = 0x08;
|
|
static uint8 g_MaskBit4 = 0x10;
|
|
static uint8 g_MaskBit5 = 0x20;
|
|
static uint8 g_MaskBit6 = 0x40;
|
|
static uint8 g_MaskBit7 = 0x80; /* Most significant bit */
|
|
|
|
static uint8 g_MaskRegularRunLength = 0x1F;
|
|
static uint8 g_MaskLiteRunLength = 0x0F;
|
|
|
|
static uint8 g_MaskSpecialFgBg1 = 0x03;
|
|
static uint8 g_MaskSpecialFgBg2 = 0x05;
|
|
|
|
typedef uint32 PIXEL;
|
|
|
|
#define BLACK_PIXEL 0
|
|
#define WHITE_PIXEL 0xffffff
|
|
|
|
/**
|
|
* Reads the supplied order header and extracts the compression
|
|
* order code ID.
|
|
*/
|
|
static uint32 ExtractCodeId(uint8 bOrderHdr)
|
|
{
|
|
int code;
|
|
|
|
switch (bOrderHdr)
|
|
{
|
|
case MEGA_MEGA_BG_RUN:
|
|
case MEGA_MEGA_FG_RUN:
|
|
case MEGA_MEGA_SET_FG_RUN:
|
|
case MEGA_MEGA_DITHERED_RUN:
|
|
case MEGA_MEGA_COLOR_RUN:
|
|
case MEGA_MEGA_FGBG_IMAGE:
|
|
case MEGA_MEGA_SET_FGBG_IMAGE:
|
|
case MEGA_MEGA_COLOR_IMAGE:
|
|
case SPECIAL_FGBG_1:
|
|
case SPECIAL_FGBG_2:
|
|
case SPECIAL_WHITE:
|
|
case SPECIAL_BLACK:
|
|
return bOrderHdr;
|
|
}
|
|
code = bOrderHdr >> 5;
|
|
switch (code)
|
|
{
|
|
case REGULAR_BG_RUN:
|
|
case REGULAR_FG_RUN:
|
|
case REGULAR_COLOR_RUN:
|
|
case REGULAR_FGBG_IMAGE:
|
|
case REGULAR_COLOR_IMAGE:
|
|
return code;
|
|
}
|
|
return bOrderHdr >> 4;
|
|
}
|
|
|
|
/**
|
|
* Extract the run length of a compression order.
|
|
*/
|
|
static uint32 ExtractRunLength(uint32 code, uint8* pbOrderHdr, uint32* advance)
|
|
{
|
|
uint32 runLength;
|
|
uint32 ladvance;
|
|
|
|
ladvance = 1;
|
|
runLength = 0;
|
|
switch (code)
|
|
{
|
|
case REGULAR_FGBG_IMAGE:
|
|
runLength = (*pbOrderHdr) & g_MaskRegularRunLength;
|
|
if (runLength == 0)
|
|
{
|
|
runLength = (*(pbOrderHdr + 1)) + 1;
|
|
ladvance += 1;
|
|
}
|
|
else
|
|
{
|
|
runLength = runLength * 8;
|
|
}
|
|
break;
|
|
case LITE_SET_FG_FGBG_IMAGE:
|
|
runLength = (*pbOrderHdr) & g_MaskLiteRunLength;
|
|
if (runLength == 0)
|
|
{
|
|
runLength = (*(pbOrderHdr + 1)) + 1;
|
|
ladvance += 1;
|
|
}
|
|
else
|
|
{
|
|
runLength = runLength * 8;
|
|
}
|
|
break;
|
|
case REGULAR_BG_RUN:
|
|
case REGULAR_FG_RUN:
|
|
case REGULAR_COLOR_RUN:
|
|
case REGULAR_COLOR_IMAGE:
|
|
runLength = (*pbOrderHdr) & g_MaskRegularRunLength;
|
|
if (runLength == 0)
|
|
{
|
|
/* An extended (MEGA) run. */
|
|
runLength = (*(pbOrderHdr + 1)) + 32;
|
|
ladvance += 1;
|
|
}
|
|
break;
|
|
case LITE_SET_FG_FG_RUN:
|
|
case LITE_DITHERED_RUN:
|
|
runLength = (*pbOrderHdr) & g_MaskLiteRunLength;
|
|
if (runLength == 0)
|
|
{
|
|
/* An extended (MEGA) run. */
|
|
runLength = (*(pbOrderHdr + 1)) + 16;
|
|
ladvance += 1;
|
|
}
|
|
break;
|
|
case MEGA_MEGA_BG_RUN:
|
|
case MEGA_MEGA_FG_RUN:
|
|
case MEGA_MEGA_SET_FG_RUN:
|
|
case MEGA_MEGA_DITHERED_RUN:
|
|
case MEGA_MEGA_COLOR_RUN:
|
|
case MEGA_MEGA_FGBG_IMAGE:
|
|
case MEGA_MEGA_SET_FGBG_IMAGE:
|
|
case MEGA_MEGA_COLOR_IMAGE:
|
|
runLength = ((uint16) pbOrderHdr[1]) | ((uint16) (pbOrderHdr[2] << 8));
|
|
ladvance += 2;
|
|
break;
|
|
}
|
|
*advance = ladvance;
|
|
return runLength;
|
|
}
|
|
|
|
#define UNROLL_COUNT 4
|
|
#define UNROLL(_exp) do { _exp _exp _exp _exp } while (0)
|
|
|
|
#undef DESTWRITEPIXEL
|
|
#undef DESTREADPIXEL
|
|
#undef SRCREADPIXEL
|
|
#undef DESTNEXTPIXEL
|
|
#undef SRCNEXTPIXEL
|
|
#undef WRITEFGBGIMAGE
|
|
#undef WRITEFIRSTLINEFGBGIMAGE
|
|
#undef RLEDECOMPRESS
|
|
#undef RLEEXTRA
|
|
#define DESTWRITEPIXEL(_buf, _pix) (_buf)[0] = (uint8)(_pix)
|
|
#define DESTREADPIXEL(_pix, _buf) _pix = (_buf)[0]
|
|
#define SRCREADPIXEL(_pix, _buf) _pix = (_buf)[0]
|
|
#define DESTNEXTPIXEL(_buf) _buf += 1
|
|
#define SRCNEXTPIXEL(_buf) _buf += 1
|
|
#define WRITEFGBGIMAGE WriteFgBgImage8to8
|
|
#define WRITEFIRSTLINEFGBGIMAGE WriteFirstLineFgBgImage8to8
|
|
#define RLEDECOMPRESS RleDecompress8to8
|
|
#define RLEEXTRA
|
|
#include "bitmap_inc.c"
|
|
|
|
#undef DESTWRITEPIXEL
|
|
#undef DESTREADPIXEL
|
|
#undef SRCREADPIXEL
|
|
#undef DESTNEXTPIXEL
|
|
#undef SRCNEXTPIXEL
|
|
#undef WRITEFGBGIMAGE
|
|
#undef WRITEFIRSTLINEFGBGIMAGE
|
|
#undef RLEDECOMPRESS
|
|
#undef RLEEXTRA
|
|
#define DESTWRITEPIXEL(_buf, _pix) ((uint16*)(_buf))[0] = (uint16)(_pix)
|
|
#define DESTREADPIXEL(_pix, _buf) _pix = ((uint16*)(_buf))[0]
|
|
#define SRCREADPIXEL(_pix, _buf) _pix = ((uint16*)(_buf))[0]
|
|
#define DESTNEXTPIXEL(_buf) _buf += 2
|
|
#define SRCNEXTPIXEL(_buf) _buf += 2
|
|
#define WRITEFGBGIMAGE WriteFgBgImage16to16
|
|
#define WRITEFIRSTLINEFGBGIMAGE WriteFirstLineFgBgImage16to16
|
|
#define RLEDECOMPRESS RleDecompress16to16
|
|
#define RLEEXTRA
|
|
#include "bitmap_inc.c"
|
|
|
|
#undef DESTWRITEPIXEL
|
|
#undef DESTREADPIXEL
|
|
#undef SRCREADPIXEL
|
|
#undef DESTNEXTPIXEL
|
|
#undef SRCNEXTPIXEL
|
|
#undef WRITEFGBGIMAGE
|
|
#undef WRITEFIRSTLINEFGBGIMAGE
|
|
#undef RLEDECOMPRESS
|
|
#undef RLEEXTRA
|
|
#define DESTWRITEPIXEL(_buf, _pix) do { (_buf)[0] = (uint8)(_pix); \
|
|
(_buf)[1] = (uint8)((_pix) >> 8); (_buf)[2] = (uint8)((_pix) >> 16); } while (0)
|
|
#define DESTREADPIXEL(_pix, _buf) _pix = (_buf)[0] | ((_buf)[1] << 8) | \
|
|
((_buf)[2] << 16)
|
|
#define SRCREADPIXEL(_pix, _buf) _pix = (_buf)[0] | ((_buf)[1] << 8) | \
|
|
((_buf)[2] << 16)
|
|
#define DESTNEXTPIXEL(_buf) _buf += 3
|
|
#define SRCNEXTPIXEL(_buf) _buf += 3
|
|
#define WRITEFGBGIMAGE WriteFgBgImage24to24
|
|
#define WRITEFIRSTLINEFGBGIMAGE WriteFirstLineFgBgImage24to24
|
|
#define RLEDECOMPRESS RleDecompress24to24
|
|
#define RLEEXTRA
|
|
#include "bitmap_inc.c"
|
|
|
|
#define IN_UINT8_MV(_p) (*((_p)++))
|
|
|
|
/**
|
|
* decompress a color 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 = IN_UINT8_MV(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 = IN_UINT8_MV(in);
|
|
*out = color;
|
|
out += 4;
|
|
indexw++;
|
|
collen--;
|
|
}
|
|
while (replen > 0)
|
|
{
|
|
*out = color;
|
|
out += 4;
|
|
indexw++;
|
|
replen--;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while (indexw < width)
|
|
{
|
|
code = IN_UINT8_MV(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 = IN_UINT8_MV(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 int bitmap_decompress4(uint8* output, int width, int height, uint8* input, int size)
|
|
{
|
|
int code;
|
|
int bytes_pro;
|
|
int total_pro;
|
|
|
|
code = IN_UINT8_MV(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;
|
|
}
|
|
|
|
/**
|
|
* bitmap flip
|
|
*/
|
|
static int bitmap_flip(uint8* src, uint8* dst, int delta, int height)
|
|
{
|
|
int index;
|
|
|
|
dst = (dst + delta * height) - delta;
|
|
for (index = 0; index < height; index++)
|
|
{
|
|
memcpy(dst, src, delta);
|
|
src += delta;
|
|
dst -= delta;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* bitmap decompression routine
|
|
*/
|
|
int bitmap_decompress(void* inst, uint8* output, int width, int height,
|
|
uint8* input, int size, int in_bpp, int out_bpp)
|
|
{
|
|
uint8* data;
|
|
|
|
if (in_bpp == 16 && out_bpp == 16)
|
|
{
|
|
data = (uint8*)xmalloc(width * height * 2);
|
|
RleDecompress16to16(input, size, data, width * 2, width, height);
|
|
bitmap_flip(data, output, width * 2, height);
|
|
xfree(data);
|
|
}
|
|
else if (in_bpp == 32 && out_bpp == 32)
|
|
{
|
|
if (!bitmap_decompress4(output, width, height, input, size))
|
|
{
|
|
return 1;
|
|
}
|
|
}
|
|
else if (in_bpp == 15 && out_bpp == 15)
|
|
{
|
|
data = (uint8*)xmalloc(width * height * 2);
|
|
RleDecompress16to16(input, size, data, width * 2, width, height);
|
|
bitmap_flip(data, output, width * 2, height);
|
|
xfree(data);
|
|
}
|
|
else if (in_bpp == 8 && out_bpp == 8)
|
|
{
|
|
data = (uint8*)xmalloc(width * height);
|
|
RleDecompress8to8(input, size, data, width, width, height);
|
|
bitmap_flip(data, output, width, height);
|
|
xfree(data);
|
|
}
|
|
else if (in_bpp == 24 && out_bpp == 24)
|
|
{
|
|
data = (uint8*)xmalloc(width * height * 3);
|
|
RleDecompress24to24(input, size, data, width * 3, width, height);
|
|
bitmap_flip(data, output, width * 3, height);
|
|
xfree(data);
|
|
}
|
|
else
|
|
{
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|