Leaked source code of windows server 2003
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#include "precomp.hxx"
void Blt24to24_NoBlend_NoTrans_Hcopy_SRCCOPY_Vcopy(
DWORD* pdSrcScanLine,
int iSrcScanStride,
DWORD* pdDstScanLine,
int iDstScanStride,
int iNumDstCols,
int iNumDstRows)
{
DWORD *pdSrcPixel,
*pdDstPixel,
*pdEndDstPixel,
*pdEndDstScanLine;
// set up pointer to next dst scanline beyond last
pdEndDstScanLine = pdDstScanLine + iNumDstRows * iDstScanStride;
while (pdDstScanLine != pdEndDstScanLine) {
// set up pointers to the first pixels
// on src and dst scanlines, and next
// pixel after last on dst scanline
pdSrcPixel = pdSrcScanLine;
pdDstPixel = pdDstScanLine;
pdEndDstPixel = pdDstPixel + iNumDstCols;
// copy scanline one pixel at a time
while (pdDstPixel != pdEndDstPixel) {
*pdDstPixel++ = *pdSrcPixel++;
}
// advance to next scanline
pdSrcScanLine += iSrcScanStride;
pdDstScanLine += iDstScanStride;
}
}
void Blt24to24_NoBlend_NoTrans_Hcopy_SRCCOPY_NoVcopy(
DWORD* pdSrcScanLine,
int iSrcScanStride,
int iNumSrcRows,
DWORD* pdDstScanLine,
int iDstScanStride,
int iNumDstCols,
int iNumDstRows)
{
DWORD *pdSrcPixel,
*pdDstPixel,
*pdEndDstPixel;
int iVertError = 0,
iVertAdvanceError,
iSrcScanAdvance;
// compute advance and error terms for stepping
// vertically through the src bitmap
if (iNumSrcRows < iNumDstRows) {
iSrcScanAdvance = 0;
iVertAdvanceError = iNumSrcRows;
} else {
iSrcScanAdvance = iSrcScanStride * (iNumSrcRows / iNumDstRows);
iVertAdvanceError = iNumSrcRows % iNumDstRows;
}
for (int i = 0; i < iNumDstRows; i++) {
// set up pointers to first pixels on src and dst
// scanlines, and next pixel after last on dst
pdSrcPixel = pdSrcScanLine;
pdDstPixel = pdDstScanLine;
pdEndDstPixel = pdDstPixel + iNumDstCols;
// copy scanline one pixel at a time
while (pdDstPixel != pdEndDstPixel) {
*pdDstPixel++ = *pdSrcPixel++;
}
// advance to next scanline
pdSrcScanLine += iSrcScanAdvance;
pdDstScanLine += iDstScanStride;
// update and check vertical stepping error,
// adjust src scanline pointer if necessary
iVertError += iVertAdvanceError;
if (iVertError >= iNumDstRows) {
pdSrcScanLine += iSrcScanStride;
iVertError -= iNumDstRows;
}
}
}
void Blt24to24_NoBlend_NoTrans_NoHcopy_SRCCOPY(
DWORD* pdSrcScanLine,
int iSrcScanStride,
int iNumSrcCols,
int iNumSrcRows,
DWORD* pdDstScanLine,
int iDstScanStride,
int iNumDstCols,
int iNumDstRows,
int iHorizMirror)
{
DWORD *pdSrcPixel,
*pdDstPixel;
int iVertError = 0,
iVertAdvanceError,
iSrcScanAdvance,
iHorizError,
iHorizAdvanceError,
iSrcPixelAdvance;
// compute advance and error terms for stepping
// vertically through the src bitmap
if (iNumSrcRows < iNumDstRows) {
iSrcScanAdvance = 0;
iVertAdvanceError = iNumSrcRows;
} else {
iSrcScanAdvance = iSrcScanStride * (iNumSrcRows / iNumDstRows);
iVertAdvanceError = iNumSrcRows % iNumDstRows;
}
// compute advance and error terms for stepping
// horizontally through src bitmap
if (iNumSrcCols < iNumDstCols) {
iSrcPixelAdvance = 0;
iHorizAdvanceError = iNumSrcCols;
} else {
iSrcPixelAdvance = iNumSrcCols / iNumDstCols;
iHorizAdvanceError = iNumSrcCols % iNumDstCols;
}
for (int i = 0; i < iNumDstRows; i++) {
// set pointers to the beginning of src and dst scanlines,
// clear horizontal stepping error accumulator
pdSrcPixel = pdSrcScanLine;
pdDstPixel = pdDstScanLine;
iHorizError = 0;
for (int j = 0; j < iNumDstCols; j++) {
// copy a pixel
*pdDstPixel = *pdSrcPixel;
// advance to next pixel
pdSrcPixel += iSrcPixelAdvance;
pdDstPixel += iHorizMirror;
// update and check horizontal stepping error,
// adjust src pixel pointer if necessary
iHorizError += iHorizAdvanceError;
if (iHorizError >= iNumDstCols) {
pdSrcPixel++;
iHorizError -= iNumDstCols;
}
}
// advance to next scanline
pdSrcScanLine += iSrcScanAdvance;
pdDstScanLine += iDstScanStride;
// update and check vertical stepping error,
// adjust src scanline pointer if necessary
iVertError += iVertAdvanceError;
if (iVertError >= iNumDstRows) {
pdSrcScanLine += iSrcScanStride;
iVertError -= iNumDstRows;
}
}
}
void Blt24to24_NoBlend_Trans_Hcopy_SRCCOPY(
DWORD* pdSrcScanLine,
int iSrcScanStride,
int iNumSrcRows,
DWORD* pdDstScanLine,
int iDstScanStride,
int iNumDstCols,
int iNumDstRows,
COLORREF crTransparent)
{
DWORD *pdSrcPixel,
*pdDstPixel;
int iVertError = 0,
iVertAdvanceError,
iSrcScanAdvance;
// compute advance and error terms for stepping
// vertically through the src bitmap
if (iNumSrcRows < iNumDstRows) {
iSrcScanAdvance = 0;
iVertAdvanceError = iNumSrcRows;
} else {
iSrcScanAdvance = iSrcScanStride * (iNumSrcRows / iNumDstRows);
iVertAdvanceError = iNumSrcRows % iNumDstRows;
}
for (int i = 0; i < iNumDstRows; i++) {
// set pointers to beginning of src and dest scanlines
pdSrcPixel = pdSrcScanLine;
pdDstPixel = pdDstScanLine;
for (int j = 0; j < iNumDstCols; j++) {
// only copy pixel if it's not transparent
if ((*pdSrcPixel ^ (DWORD) crTransparent) & UNUSED_MASK) {
*pdDstPixel = *pdSrcPixel;
}
pdSrcPixel++;
pdDstPixel++;
}
// advance to next scanline
pdSrcScanLine += iSrcScanAdvance;
pdDstScanLine += iDstScanStride;
// update and check vertical stepping error,
// adjust src scanline pointer if necessary
iVertError += iVertAdvanceError;
if (iVertError >= iNumDstRows) {
pdSrcScanLine += iSrcScanStride;
iVertError -= iNumDstRows;
}
}
}
void Blt24to24_NoBlend_Trans_NoHcopy_SRCCOPY(
DWORD* pdSrcScanLine,
int iSrcScanStride,
int iNumSrcCols,
int iNumSrcRows,
DWORD* pdDstScanLine,
int iDstScanStride,
int iNumDstCols,
int iNumDstRows,
int iHorizMirror,
COLORREF crTransparent)
{
DWORD *pdSrcPixel,
*pdDstPixel;
int iVertError = 0,
iVertAdvanceError,
iSrcScanAdvance,
iHorizError,
iHorizAdvanceError,
iSrcPixelAdvance;
// compute advance and error terms for stepping
// vertically through the src bitmap
if (iNumSrcRows < iNumDstRows) {
iSrcScanAdvance = 0;
iVertAdvanceError = iNumSrcRows;
} else {
iSrcScanAdvance = iSrcScanStride * (iNumSrcRows / iNumDstRows);
iVertAdvanceError = iNumSrcRows % iNumDstRows;
}
// compute advance and error terms for stepping
// horizontally through src bitmap
if (iNumSrcCols < iNumDstCols) {
iSrcPixelAdvance = 0;
iHorizAdvanceError = iNumSrcCols;
} else {
iSrcPixelAdvance = iNumSrcCols / iNumDstCols;
iHorizAdvanceError = iNumSrcCols % iNumDstCols;
}
for (int i = 0; i < iNumDstRows; i++) {
// set pointers to the beginning of src and dst scanlines,
// clear horizontal stepping error accumulator
pdSrcPixel = pdSrcScanLine;
pdDstPixel = pdDstScanLine;
iHorizError = 0;
for (int j = 0; j < iNumDstCols; j++) {
// only copy pixel if it's not transparent
if ((*pdSrcPixel ^ (DWORD) crTransparent) & UNUSED_MASK) {
*pdDstPixel = *pdSrcPixel;
}
// advance to next pixel
pdSrcPixel += iSrcPixelAdvance;
pdDstPixel += iHorizMirror;
// update and check horizontal stepping error,
// adjust src pixel pointer if necessary
iHorizError += iHorizAdvanceError;
if (iHorizError >= iNumDstCols) {
pdSrcPixel++;
iHorizError -= iNumDstCols;
}
}
// advance to next scanline
pdSrcScanLine += iSrcScanAdvance;
pdDstScanLine += iDstScanStride;
// update and check vertical stepping error,
// adjust src scanline pointer if necessary
iVertError += iVertAdvanceError;
if (iVertError >= iNumDstRows) {
pdSrcScanLine += iSrcScanStride;
iVertError -= iNumDstRows;
}
}
}
#ifndef DDRAW
void Blt24to24_Blend_NoTrans_Hcopy_SRCCOPY(
DWORD* pdSrcScanLine,
int iSrcScanStride,
int iNumSrcRows,
DWORD* pdDstScanLine,
int iDstScanStride,
int iNumDstCols,
int iNumDstRows,
ALPHAREF arAlpha)
{
DWORD *pdSrcPixel,
*pdDstPixel,
*pdEndDstPixel;
int iVertError = 0,
iVertAdvanceError,
iSrcScanAdvance;
UINT uiAlpha = (UINT)ALPHAFROMDWORD(arAlpha),
uiAlphaComp = 256 - uiAlpha;
// compute advance and error terms for stepping
// vertically through the src bitmap
if (iNumSrcRows < iNumDstRows) {
iSrcScanAdvance = 0;
iVertAdvanceError = iNumSrcRows;
} else {
iSrcScanAdvance = iSrcScanStride * (iNumSrcRows / iNumDstRows);
iVertAdvanceError = iNumSrcRows % iNumDstRows;
}
for (int i = 0; i < iNumDstRows; i++) {
// set up pointers to first pixels on src and dst
// scanlines, and next pixel after last on dst
pdSrcPixel = pdSrcScanLine;
pdDstPixel = pdDstScanLine;
pdEndDstPixel = pdDstPixel + iNumDstCols;
// copy scanline one pixel at a time
while (pdDstPixel != pdEndDstPixel) {
*pdDstPixel++ = BLIT_BLEND(*pdSrcPixel,*pdDstPixel,
uiAlpha,uiAlphaComp);
pdSrcPixel++;
}
// advance to next scanline
pdSrcScanLine += iSrcScanAdvance;
pdDstScanLine += iDstScanStride;
// update and check vertical stepping error,
// adjust src scanline pointer if necessary
iVertError += iVertAdvanceError;
if (iVertError >= iNumDstRows) {
pdSrcScanLine += iSrcScanStride;
iVertError -= iNumDstRows;
}
}
}
void Blt24to24_Blend_NoTrans_NoHcopy_SRCCOPY(
DWORD* pdSrcScanLine,
int iSrcScanStride,
int iNumSrcCols,
int iNumSrcRows,
DWORD* pdDstScanLine,
int iDstScanStride,
int iNumDstCols,
int iNumDstRows,
int iHorizMirror,
ALPHAREF arAlpha)
{
DWORD *pdSrcPixel,
*pdDstPixel;
int iVertError = 0,
iVertAdvanceError,
iSrcScanAdvance,
iHorizError,
iHorizAdvanceError,
iSrcPixelAdvance;
UINT uiAlpha = (UINT)ALPHAFROMDWORD(arAlpha),
uiAlphaComp = 256 - uiAlpha;
// compute advance and error terms for stepping
// vertically through the src bitmap
if (iNumSrcRows < iNumDstRows) {
iSrcScanAdvance = 0;
iVertAdvanceError = iNumSrcRows;
} else {
iSrcScanAdvance = iSrcScanStride * (iNumSrcRows / iNumDstRows);
iVertAdvanceError = iNumSrcRows % iNumDstRows;
}
// compute advance and error terms for stepping
// horizontally through src bitmap
if (iNumSrcCols < iNumDstCols) {
iSrcPixelAdvance = 0;
iHorizAdvanceError = iNumSrcCols;
} else {
iSrcPixelAdvance = iNumSrcCols / iNumDstCols;
iHorizAdvanceError = iNumSrcCols % iNumDstCols;
}
for (int i = 0; i < iNumDstRows; i++) {
// set pointers to the beginning of src and dst scanlines,
// clear horizontal stepping error accumulator
pdSrcPixel = pdSrcScanLine;
pdDstPixel = pdDstScanLine;
iHorizError = 0;
for (int j = 0; j < iNumDstCols; j++) {
// copy a pixel
*pdDstPixel = BLIT_BLEND(*pdSrcPixel,*pdDstPixel,
uiAlpha,uiAlphaComp);
// advance to next pixel
pdSrcPixel += iSrcPixelAdvance;
pdDstPixel += iHorizMirror;
// update and check horizontal stepping error,
// adjust src pixel pointer if necessary
iHorizError += iHorizAdvanceError;
if (iHorizError >= iNumDstCols) {
pdSrcPixel++;
iHorizError -= iNumDstCols;
}
}
// advance to next scanline
pdSrcScanLine += iSrcScanAdvance;
pdDstScanLine += iDstScanStride;
// update and check vertical stepping error,
// adjust src scanline pointer if necessary
iVertError += iVertAdvanceError;
if (iVertError >= iNumDstRows) {
pdSrcScanLine += iSrcScanStride;
iVertError -= iNumDstRows;
}
}
}
void Blt24to24_Blend_Trans_Hcopy_SRCCOPY(
DWORD* pdSrcScanLine,
int iSrcScanStride,
int iNumSrcRows,
DWORD* pdDstScanLine,
int iDstScanStride,
int iNumDstCols,
int iNumDstRows,
COLORREF crTransparent,
ALPHAREF arAlpha)
{
DWORD *pdSrcPixel,
*pdDstPixel;
int iVertError = 0,
iVertAdvanceError,
iSrcScanAdvance;
UINT uiAlpha = (UINT)ALPHAFROMDWORD(arAlpha),
uiAlphaComp = 256 - uiAlpha;
// compute advance and error terms for stepping
// vertically through the src bitmap
if (iNumSrcRows < iNumDstRows) {
iSrcScanAdvance = 0;
iVertAdvanceError = iNumSrcRows;
} else {
iSrcScanAdvance = iSrcScanStride * (iNumSrcRows / iNumDstRows);
iVertAdvanceError = iNumSrcRows % iNumDstRows;
}
for (int i = 0; i < iNumDstRows; i++) {
// set pointers to beginning of src and dest scanlines
pdSrcPixel = pdSrcScanLine;
pdDstPixel = pdDstScanLine;
for (int j = 0; j < iNumDstCols; j++) {
// only copy pixel if it's not transparent
if ((*pdSrcPixel ^ (DWORD) crTransparent) & UNUSED_MASK){
*pdDstPixel = BLIT_BLEND(*pdSrcPixel,*pdDstPixel,
uiAlpha,uiAlphaComp);
}
pdSrcPixel++;
pdDstPixel++;
}
// advance to next scanline
pdSrcScanLine += iSrcScanAdvance;
pdDstScanLine += iDstScanStride;
// update and check vertical stepping error,
// adjust src scanline pointer if necessary
iVertError += iVertAdvanceError;
if (iVertError >= iNumDstRows) {
pdSrcScanLine += iSrcScanStride;
iVertError -= iNumDstRows;
}
}
}
void Blt24to24_Blend_Trans_NoHcopy_SRCCOPY(
DWORD* pdSrcScanLine,
int iSrcScanStride,
int iNumSrcCols,
int iNumSrcRows,
DWORD* pdDstScanLine,
int iDstScanStride,
int iNumDstCols,
int iNumDstRows,
int iHorizMirror,
COLORREF crTransparent,
ALPHAREF arAlpha)
{
DWORD *pdSrcPixel,
*pdDstPixel;
int iVertError = 0,
iVertAdvanceError,
iSrcScanAdvance,
iHorizError,
iHorizAdvanceError,
iSrcPixelAdvance;
UINT uiAlpha = (UINT)ALPHAFROMDWORD(arAlpha),
uiAlphaComp = 256 - uiAlpha;
// compute advance and error terms for stepping
// vertically through the src bitmap
if (iNumSrcRows < iNumDstRows) {
iSrcScanAdvance = 0;
iVertAdvanceError = iNumSrcRows;
} else {
iSrcScanAdvance = iSrcScanStride * (iNumSrcRows / iNumDstRows);
iVertAdvanceError = iNumSrcRows % iNumDstRows;
}
// compute advance and error terms for stepping
// horizontally through src bitmap
if (iNumSrcCols < iNumDstCols) {
iSrcPixelAdvance = 0;
iHorizAdvanceError = iNumSrcCols;
} else {
iSrcPixelAdvance = iNumSrcCols / iNumDstCols;
iHorizAdvanceError = iNumSrcCols % iNumDstCols;
}
for (int i = 0; i < iNumDstRows; i++) {
// set pointers to the beginning of src and dst scanlines,
// clear horizontal stepping error accumulator
pdSrcPixel = pdSrcScanLine;
pdDstPixel = pdDstScanLine;
iHorizError = 0;
for (int j = 0; j < iNumDstCols; j++) {
// only copy pixel if it's not transparent
if ((*pdSrcPixel ^ (DWORD) crTransparent) & UNUSED_MASK) {
*pdDstPixel = BLIT_BLEND(*pdSrcPixel,*pdDstPixel,
uiAlpha,uiAlphaComp);
}
// advance to next pixel
pdSrcPixel += iSrcPixelAdvance;
pdDstPixel += iHorizMirror;
// update and check horizontal stepping error,
// adjust src pixel pointer if necessary
iHorizError += iHorizAdvanceError;
if (iHorizError >= iNumDstCols) {
pdSrcPixel++;
iHorizError -= iNumDstCols;
}
}
// advance to next scanline
pdSrcScanLine += iSrcScanAdvance;
pdDstScanLine += iDstScanStride;
// update and check vertical stepping error,
// adjust src scanline pointer if necessary
iVertError += iVertAdvanceError;
if (iVertError >= iNumDstRows) {
pdSrcScanLine += iSrcScanStride;
iVertError -= iNumDstRows;
}
}
}
#endif