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Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.

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This commit is contained in:
Colin Finck 2017-10-03 07:45:34 +00:00
parent b94e2d8ca0
commit c2c66aff7d
24198 changed files with 0 additions and 37285 deletions
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99
win32ss/gdi/eng/rlecomp.c Normal file
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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* PURPOSE: RLE compression
* FILE: win32ss/gdi/eng/rlecomp.c
* PROGRAMER: Jason Filby
*/
#include <win32k.h>
#define NDEBUG
#include <debug.h>
enum Rle_EscapeCodes
{
RLE_EOL = 0, /* End of line */
RLE_END = 1, /* End of bitmap */
RLE_DELTA = 2 /* Delta */
};
VOID DecompressBitmap(SIZEL Size, BYTE *CompressedBits, BYTE *UncompressedBits, LONG Delta, ULONG Format, ULONG cjSizeImage)
{
INT x = 0;
INT y = Size.cy - 1;
INT c;
INT length;
INT width;
INT height = y;
BYTE *begin = CompressedBits;
BYTE *bits = CompressedBits;
BYTE *temp;
INT shift = 0;
if ((Format == BMF_4RLE) || (Format == BMF_4BPP))
shift = 1;
else if ((Format != BMF_8RLE) && (Format != BMF_8BPP))
return;
width = ((Size.cx + shift) >> shift);
_SEH2_TRY
{
while (y >= 0 && (bits - begin) <= cjSizeImage)
{
length = (*bits++) >> shift;
if (length)
{
c = *bits++;
while (length--)
{
if (x >= width) break;
temp = UncompressedBits + (((height - y) * Delta) + x);
x++;
*temp = c;
}
}
else
{
length = *bits++;
switch (length)
{
case RLE_EOL:
x = 0;
y--;
break;
case RLE_END:
_SEH2_YIELD(return);
case RLE_DELTA:
x += (*bits++) >> shift;
y -= (*bits++) >> shift;
break;
default:
length = length >> shift;
while (length--)
{
c = *bits++;
if (x < width)
{
temp = UncompressedBits + (((height - y) * Delta) + x);
x++;
*temp = c;
}
}
if ((bits - begin) & 1)
{
bits++;
}
}
}
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
DPRINT1("Decoding error\n");
}
_SEH2_END;
return;
}