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Speed up 24bpp fills

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svn path=/trunk/; revision=15848
This commit is contained in:
Gé van Geldorp 2005-06-09 19:04:32 +00:00
parent ecb9480129
commit bb18fc25e9
1 changed files with 98 additions and 14 deletions
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112
reactos/subsys/win32k/dib/dib24bpp.c
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@ -38,16 +38,100 @@ VOID
DIB_24BPP_HLine(SURFOBJ *SurfObj, LONG x1, LONG x2, LONG y, ULONG c)
{
PBYTE addr = SurfObj->pvScan0 + y * SurfObj->lDelta + (x1 << 1) + x1;
LONG cx = x1;
ULONG Count = x2 - x1;
#ifndef _M_IX86
ULONG MultiCount;
ULONG Fill[3];
#endif
c &= 0xFFFFFF;
while(cx < x2) {
*(PUSHORT)(addr) = c & 0xFFFF;
addr += 2;
*(addr) = c >> 16;
addr += 1;
++cx;
}
if (Count < 8)
{
/* For small fills, don't bother doing anything fancy */
while (Count--)
{
*(PUSHORT)(addr) = c;
addr += 2;
*(addr) = c >> 16;
addr += 1;
}
}
else
{
/* Align to 4-byte address */
while (0 != ((ULONG_PTR) addr & 0x3))
{
*(PUSHORT)(addr) = c;
addr += 2;
*(addr) = c >> 16;
addr += 1;
Count--;
}
/* If the color we need to fill with is 0ABC, then the final mem pattern
* (note little-endianness) would be:
*
* |C.B.A|C.B.A|C.B.A|C.B.A| <- pixel borders
* |C.B.A.C|B.A.C.B|A.C.B.A| <- ULONG borders
*
* So, taking endianness into account again, we need to fill with these
* ULONGs: CABC BCAB ABCA */
#ifdef _M_IX86
/* This is about 30% faster than the generic C code below */
__asm__ __volatile__ (
" movl %1, %%ecx\n"
" andl $0xffffff, %%ecx\n" /* 0ABC */
" movl %%ecx, %%ebx\n" /* Construct BCAB in ebx */
" shrl $8, %%ebx\n"
" movl %%ecx, %%eax\n"
" shll $16, %%eax\n"
" orl %%eax, %%ebx\n"
" movl %%ecx, %%edx\n" /* Construct ABCA in edx */
" shll $8, %%edx\n"
" movl %%ecx, %%eax\n"
" shrl $16, %%eax\n"
" orl %%eax, %%edx\n"
" movl %%ecx, %%eax\n" /* Construct CABC in eax */
" shll $24, %%eax\n"
" orl %%ecx, %%eax\n"
" movl %2, %%ecx\n" /* Load count */
" shr $2, %%ecx\n"
" movl %3, %%edi\n" /* Load dest */
".L1:\n"
" movl %%eax, (%%edi)\n" /* Store 4 pixels, 12 bytes */
" movl %%ebx, 4(%%edi)\n"
" movl %%edx, 8(%%edi)\n"
" addl $12, %%edi\n"
" dec %%ecx\n"
" jnz .L1\n"
" movl %%edi, %0\n"
: "=m"(addr)
: "m"(c), "m"(Count), "m"(addr)
: "%eax", "%ebx", "%ecx", "%edx", "%edi");
#else
c = c & 0xffffff; /* 0ABC */
Fill[0] = c | (c << 24); /* CABC */
Fill[1] = (c >> 8) | (c << 16); /* BCAB */
Fill[2] = (c << 8) | (c >> 16); /* ABCA */
MultiCount = Count / 4;
do
{
*(PULONG)addr = Fill[0];
addr += 4;
*(PULONG)addr = Fill[1];
addr += 4;
*(PULONG)addr = Fill[2];
addr += 4;
}
while (0 != --MultiCount);
#endif
Count = Count & 0x03;
while (0 != Count--)
{
*(PUSHORT)(addr) = c;
addr += 2;
*(addr) = c >> 16;
addr += 1;
}
}
}
VOID
@ -308,12 +392,12 @@ DIB_24BPP_ColorFill(SURFOBJ* DestSurface, RECTL* DestRect, ULONG color)
{
ULONG DestY;
for (DestY = DestRect->top; DestY< DestRect->bottom; DestY++)
{
DIB_24BPP_HLine(DestSurface, DestRect->left, DestRect->right, DestY, color);
}
for (DestY = DestRect->top; DestY< DestRect->bottom; DestY++)
{
DIB_24BPP_HLine(DestSurface, DestRect->left, DestRect->right, DestY, color);
}
return TRUE;
return TRUE;
}
//NOTE: If you change something here, please do the same in other dibXXbpp.c files!