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SetImageBits_8: added ->15 conversion in optimized assembler.

This commit is contained in:
Marcus Meissner 2000-05-07 20:24:08 +00:00 committed by Alexandre Julliard
parent 688c05301a
commit 3cec2ce3d3
1 changed files with 35 additions and 1 deletions
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36
graphics/x11drv/dib.c
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@ -882,7 +882,7 @@ static void X11DRV_DIB_SetImageBits_RLE4( int lines, const BYTE *bits,
*/
static void X11DRV_DIB_SetImageBits_8( int lines, const BYTE *srcbits,
DWORD srcwidth, DWORD dstwidth, int left,
int *colors, XImage *bmpImage )
const int *colors, XImage *bmpImage )
{
DWORD x;
int h, color;
@ -902,6 +902,40 @@ static void X11DRV_DIB_SetImageBits_8( int lines, const BYTE *srcbits,
bits = srcbits + left;
switch (bmpImage->depth) {
case 15:
case 16:
#if defined(__i386__) && defined(__GNUC__)
/* Some X servers might have 32 bit/ 16bit deep pixel */
if (bmpImage->bits_per_pixel == 16)
{
for (h = lines ; h--; ) {
/* Borrowed from DirectDraw */
__asm__ __volatile__(
"xor %%eax,%%eax\n"
"1:\n"
" lodsb\n"
" movw (%%edx,%%eax,4),%%ax\n"
" stosw\n"
" xor %%eax,%%eax\n"
" loop 1b\n"
: /*"=S" (bits), "=D" (dstbits)*/
:"S" (bits),
"D" (bmpImage->data+h*bmpImage->bytes_per_line+left*2),
"c" (dstwidth-left),
"d" (colors)
:"eax", "cc", "memory"
);
bits = (srcbits += linebytes) + left;
}
return;
}
break;
#endif
default:
break; /* use slow generic case below */
}
for (h = lines - 1; h >= 0; h--) {
for (x = left; x < dstwidth; x++, bits++) {
color = colors[*bits];