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bitmap decompression now functional

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This commit is contained in:
Jay Sorg 2011-07-08 11:41:56 -07:00
parent 4012b2db9b
commit b89d72510c
1 changed files with 70 additions and 37 deletions
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107
libfreerdp-core/rle_bitmap_stream.c
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@ -67,7 +67,7 @@ static uint8 g_MaskSpecialFgBg2 = 0x05;
typedef uint32 PIXEL;
/*
Returns the color depth (in bytes per pixel) that was selected
Returns the color depth (in bits per pixel) that was selected
for the RDP connection.
*/
static uint32
@ -76,6 +76,17 @@ GetColorDepth(void)
return 8;
}
/*
Returns the color depth (in bytes per pixel) that was selected
for the RDP connection.
*/
static uint32
GetColorDepthInBytes(void)
{
/* bytes per pixel, see above */
return 1;
}
/*
PIXEL is a dynamic type that is sized based on the current color
depth being used for the RDP connection.
@ -124,6 +135,7 @@ GetPixelSize(void)
{
return 3;
}
return 1;
}
/*
@ -142,19 +154,31 @@ NextPixel(uint8 * pbBuffer)
static uint32
ExtractCodeId(uint8 bOrderHdr)
{
/* TODO */
return 0;
}
int code;
/*
Returns a pointer to the data that follows the compression
order header and optional run length.
*/
static uint8 *
AdvanceOverOrderHeader(uint32 codeId, uint8 * pbOrderHdr)
{
/* TODO */
return pbOrderHdr;
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:
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;
}
/*
@ -243,6 +267,7 @@ GetColorBlack(void)
{
return (PIXEL) 0x000000;
}
return 0;
}
/*
@ -291,7 +316,7 @@ GetColorWhite(void)
Image Order.
*/
static uint32
ExtractRunLengthRegularFgBg(uint8 * pbOrderHdr)
ExtractRunLengthRegularFgBg(uint8 * pbOrderHdr, uint32 * advance)
{
uint32 runLength;
@ -299,6 +324,7 @@ ExtractRunLengthRegularFgBg(uint8 * pbOrderHdr)
if (runLength == 0)
{
runLength = (*(pbOrderHdr + 1)) + 1;
*advance += 1;
}
else
{
@ -312,7 +338,7 @@ ExtractRunLengthRegularFgBg(uint8 * pbOrderHdr)
Image Order.
*/
static uint32
ExtractRunLengthLiteFgBg(uint8 * pbOrderHdr)
ExtractRunLengthLiteFgBg(uint8 * pbOrderHdr, uint32 * advance)
{
uint32 runLength;
@ -320,6 +346,7 @@ ExtractRunLengthLiteFgBg(uint8 * pbOrderHdr)
if (runLength == 0)
{
runLength = (*(pbOrderHdr + 1)) + 1;
*advance += 1;
}
else
{
@ -332,7 +359,7 @@ ExtractRunLengthLiteFgBg(uint8 * pbOrderHdr)
Extract the run length of a regular-form compression order.
*/
static uint32
ExtractRunLengthRegular(uint8 * pbOrderHdr)
ExtractRunLengthRegular(uint8 * pbOrderHdr, uint32 * advance)
{
uint32 runLength;
@ -343,6 +370,7 @@ ExtractRunLengthRegular(uint8 * pbOrderHdr)
An extended (MEGA) run.
*/
runLength = (*(pbOrderHdr + 1)) + 32;
*advance += 1;
}
return runLength;
}
@ -351,7 +379,7 @@ ExtractRunLengthRegular(uint8 * pbOrderHdr)
Extract the run length of a lite-form compression order.
*/
static uint32
ExtractRunLengthLite(uint8 * pbOrderHdr)
ExtractRunLengthLite(uint8 * pbOrderHdr, uint32 * advance)
{
uint32 runLength;
@ -362,6 +390,7 @@ ExtractRunLengthLite(uint8 * pbOrderHdr)
An extended (MEGA) run.
*/
runLength = (*(pbOrderHdr + 1)) + 16;
*advance += 1;
}
return runLength;
}
@ -370,12 +399,13 @@ ExtractRunLengthLite(uint8 * pbOrderHdr)
Extract the run length of a MEGA_MEGA-type compression order.
*/
static uint32
ExtractRunLengthMegaMega(uint8 * pbOrderHdr)
ExtractRunLengthMegaMega(uint8 * pbOrderHdr, uint32 * advance)
{
uint32 runLength;
pbOrderHdr = pbOrderHdr + 1;
runLength = ((uint16) pbOrderHdr[0]) | ((uint16) (pbOrderHdr[1] << 8));
*advance += 2;
return runLength;
}
@ -383,29 +413,30 @@ ExtractRunLengthMegaMega(uint8 * pbOrderHdr)
Extract the run length of a compression order.
*/
static uint32
ExtractRunLength(uint32 code, uint8 * pbOrderHdr)
ExtractRunLength(uint32 code, uint8 * pbOrderHdr, uint32 * advance)
{
uint32 runLength;
*advance = 1;
if (code == REGULAR_FGBG_IMAGE)
{
runLength = ExtractRunLengthRegularFgBg(pbOrderHdr);
runLength = ExtractRunLengthRegularFgBg(pbOrderHdr, advance);
}
else if (code == LITE_SET_FG_FGBG_IMAGE)
{
runLength = ExtractRunLengthLiteFgBg(pbOrderHdr);
runLength = ExtractRunLengthLiteFgBg(pbOrderHdr, advance);
}
else if (IsRegularCode(code))
{
runLength = ExtractRunLengthRegular(pbOrderHdr);
runLength = ExtractRunLengthRegular(pbOrderHdr, advance);
}
else if (IsLiteCode(code))
{
runLength = ExtractRunLengthLite(pbOrderHdr);
runLength = ExtractRunLengthLite(pbOrderHdr, advance);
}
else if (IsMegaMegaCode(code))
{
runLength = ExtractRunLengthMegaMega(pbOrderHdr);
runLength = ExtractRunLengthMegaMega(pbOrderHdr, advance);
}
else
{
@ -680,6 +711,8 @@ RleDecompress(uint8 * pbSrcBuffer, uint32 cbSrcBuffer,
uint32 runLength;
uint32 code;
uint32 advance;
while (pbSrc < pbEnd)
{
/*
@ -705,8 +738,8 @@ RleDecompress(uint8 * pbSrcBuffer, uint32 cbSrcBuffer,
*/
if (code == REGULAR_BG_RUN || code == MEGA_MEGA_BG_RUN)
{
runLength = ExtractRunLength(code, pbSrc);
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
runLength = ExtractRunLength(code, pbSrc, &advance);
pbSrc = pbSrc + advance;
if (fFirstLine)
{
@ -760,8 +793,8 @@ RleDecompress(uint8 * pbSrcBuffer, uint32 cbSrcBuffer,
if (code == REGULAR_FG_RUN || code == MEGA_MEGA_FG_RUN ||
code == LITE_SET_FG_FG_RUN || code == MEGA_MEGA_SET_FG_RUN)
{
runLength = ExtractRunLength(code, pbSrc);
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
runLength = ExtractRunLength(code, pbSrc, &advance);
pbSrc = pbSrc + advance;
if (code == LITE_SET_FG_FG_RUN || code == MEGA_MEGA_SET_FG_RUN)
{
@ -793,8 +826,8 @@ RleDecompress(uint8 * pbSrcBuffer, uint32 cbSrcBuffer,
*/
if (code == LITE_DITHERED_RUN || code == MEGA_MEGA_DITHERED_RUN)
{
runLength = ExtractRunLength(code, pbSrc);
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
runLength = ExtractRunLength(code, pbSrc, &advance);
pbSrc = pbSrc + advance;
pixelA = ReadPixel(pbSrc);
pbSrc = NextPixel(pbSrc);
@ -819,8 +852,8 @@ RleDecompress(uint8 * pbSrcBuffer, uint32 cbSrcBuffer,
*/
if (code == REGULAR_COLOR_RUN || code == MEGA_MEGA_COLOR_RUN)
{
runLength = ExtractRunLength(code, pbSrc);
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
runLength = ExtractRunLength(code, pbSrc, &advance);
pbSrc = pbSrc + advance;
pixelA = ReadPixel(pbSrc);
pbSrc = NextPixel(pbSrc);
@ -842,8 +875,8 @@ RleDecompress(uint8 * pbSrcBuffer, uint32 cbSrcBuffer,
if (code == REGULAR_FGBG_IMAGE || code == MEGA_MEGA_FGBG_IMAGE ||
code == LITE_SET_FG_FGBG_IMAGE || code == MEGA_MEGA_SET_FGBG_IMAGE)
{
runLength = ExtractRunLength(code, pbSrc);
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
runLength = ExtractRunLength(code, pbSrc, &advance);
pbSrc = pbSrc + advance;
if (code == LITE_SET_FG_FGBG_IMAGE || code == MEGA_MEGA_SET_FGBG_IMAGE)
{
@ -892,10 +925,10 @@ RleDecompress(uint8 * pbSrcBuffer, uint32 cbSrcBuffer,
{
uint32 byteCount;
runLength = ExtractRunLength(code, pbSrc);
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
runLength = ExtractRunLength(code, pbSrc, &advance);
pbSrc = pbSrc + advance;
byteCount = runLength * GetColorDepth();
byteCount = runLength * GetColorDepthInBytes();
while (byteCount > 0)
{