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[WIN32SS][NTGDI] Optimize UnsafeGetBitmapBits/UnsafeSetBitmapBits

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This commit is contained in:
Katayama Hirofumi MZ 2019-01-29 12:04:46 +09:00
parent 06d4fce5ee
commit 1cd2f5438c
1 changed files with 12 additions and 10 deletions
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22
win32ss/gdi/ntgdi/bitmaps.c
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@ -52,7 +52,7 @@ UnsafeSetBitmapBits(
{
PUCHAR pjDst;
const UCHAR *pjSrc;
LONG lDeltaDst, lDeltaSrc;
LONG lDeltaDst, lDeltaSrc, lDeltaDstAbs;
ULONG Y, iSrc, iDst, cbSrc, cbDst, nWidth, nHeight, cBitsPixel;
NT_ASSERT(psurf->flags & API_BITMAP);
@ -65,17 +65,18 @@ UnsafeSetBitmapBits(
pjDst = psurf->SurfObj.pvScan0;
pjSrc = pvBits;
lDeltaDst = psurf->SurfObj.lDelta;
lDeltaDstAbs = labs(lDeltaDst);
lDeltaSrc = WIDTH_BYTES_ALIGN16(nWidth, cBitsPixel);
NT_ASSERT(lDeltaSrc <= labs(lDeltaDst));
NT_ASSERT(lDeltaSrc <= lDeltaDstAbs);
cbDst = labs(lDeltaDst) * nHeight;
cbDst = lDeltaDstAbs * nHeight;
cbSrc = lDeltaSrc * nHeight;
cjBits = min(cjBits, cbSrc);
iSrc = iDst = 0;
for (Y = 0; Y < nHeight; Y++)
{
if (iSrc + lDeltaSrc > cjBits || iDst + labs(lDeltaDst) > cbDst)
if (iSrc + lDeltaSrc > cjBits || iDst + lDeltaDstAbs > cbDst)
{
LONG lDelta = min(cjBits - iSrc, cbDst - iDst);
NT_ASSERT(lDelta >= 0);
@ -89,7 +90,7 @@ UnsafeSetBitmapBits(
pjSrc += lDeltaSrc;
pjDst += lDeltaDst;
iSrc += lDeltaSrc;
iDst += labs(lDeltaDst);
iDst += lDeltaDstAbs;
}
return iSrc;
@ -504,7 +505,7 @@ UnsafeGetBitmapBits(
OUT PBYTE pvBits)
{
PUCHAR pjDst, pjSrc;
LONG lDeltaDst, lDeltaSrc;
LONG lDeltaDst, lDeltaSrc, lDeltaSrcAbs;
ULONG Y, iSrc, iDst, cbSrc, cbDst, nWidth, nHeight, cBitsPixel;
nWidth = psurf->SurfObj.sizlBitmap.cx;
@ -515,17 +516,18 @@ UnsafeGetBitmapBits(
pjSrc = psurf->SurfObj.pvScan0;
pjDst = pvBits;
lDeltaSrc = psurf->SurfObj.lDelta;
lDeltaSrcAbs = labs(lDeltaSrc);
lDeltaDst = WIDTH_BYTES_ALIGN16(nWidth, cBitsPixel);
NT_ASSERT(labs(lDeltaSrc) >= lDeltaDst);
NT_ASSERT(lDeltaSrcAbs >= lDeltaDst);
cbSrc = nHeight * labs(lDeltaSrc);
cbSrc = nHeight * lDeltaSrcAbs;
cbDst = nHeight * lDeltaDst;
Bytes = min(Bytes, cbDst);
iSrc = iDst = 0;
for (Y = 0; Y < nHeight; Y++)
{
if (iSrc + labs(lDeltaSrc) > cbSrc || iDst + lDeltaDst > Bytes)
if (iSrc + lDeltaSrcAbs > cbSrc || iDst + lDeltaDst > Bytes)
{
LONG lDelta = min(cbSrc - iSrc, Bytes - iDst);
NT_ASSERT(lDelta >= 0);
@ -538,7 +540,7 @@ UnsafeGetBitmapBits(
RtlCopyMemory(pjDst, pjSrc, lDeltaDst);
pjSrc += lDeltaSrc;
pjDst += lDeltaDst;
iSrc += labs(lDeltaSrc);
iSrc += lDeltaSrcAbs;
iDst += lDeltaDst;
}