зеркало из https://github.com/mozilla/gecko-dev.git
Bug 187819. Make nsImageWin::Draw easier to read. r=smontagu, sr=roc+moz
This commit is contained in:
paper%animecity.nu
Родитель
d1ea99b3c8
Коммит
9d1714d8b4
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@ -440,40 +440,37 @@ nsImageWin :: CreateDDB(nsDrawingSurface aSurface)
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* @update 3/27/00 dwc
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*/
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NS_IMETHODIMP
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nsImageWin :: Draw(nsIRenderingContext &aContext, nsDrawingSurface aSurface,
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PRInt32 aSX, PRInt32 aSY, PRInt32 aSWidth, PRInt32 aSHeight,
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PRInt32 aDX, PRInt32 aDY, PRInt32 aDWidth, PRInt32 aDHeight)
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nsImageWin::Draw(nsIRenderingContext &aContext, nsDrawingSurface aSurface,
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PRInt32 aSX, PRInt32 aSY, PRInt32 aSWidth, PRInt32 aSHeight,
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PRInt32 aDX, PRInt32 aDY, PRInt32 aDWidth, PRInt32 aDHeight)
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{
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HDC TheHDC;
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PRInt32 canRaster,srcy;
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HBITMAP oldBits;
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DWORD rop;
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PRInt32 origSHeight = aSHeight, origDHeight = aDHeight;
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PRInt32 origSWidth = aSWidth, origDWidth = aDWidth;
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if (mBHead == nsnull || aSWidth < 0 || aDWidth < 0 || aSHeight < 0 || aDHeight < 0)
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if (mBHead == nsnull ||
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aSWidth < 0 || aDWidth < 0 || aSHeight < 0 || aDHeight < 0)
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return NS_ERROR_FAILURE;
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if (0 == aSWidth || 0 == aDWidth || 0 == aSHeight || 0 == aDHeight)
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return NS_OK;
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PRInt32 origSHeight = aSHeight, origDHeight = aDHeight;
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PRInt32 origSWidth = aSWidth, origDWidth = aDWidth;
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// limit the size of the blit to the amount of the image read in
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if (aSX + aSWidth > mDecodedX2) {
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aDWidth -= ((aSX + aSWidth - mDecodedX2)*origDWidth)/origSWidth;
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aDWidth -= ((aSX + aSWidth - mDecodedX2) * origDWidth) / origSWidth;
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aSWidth -= (aSX + aSWidth) - mDecodedX2;
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}
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if (aSX < mDecodedX1) {
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aDX += ((mDecodedX1 - aSX)*origDWidth)/origSWidth;
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aDX += ((mDecodedX1 - aSX) * origDWidth) / origSWidth;
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aSX = mDecodedX1;
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}
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if (aSY + aSHeight > mDecodedY2) {
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aDHeight -= ((aSY + aSHeight - mDecodedY2)*origDHeight)/origSHeight;
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aDHeight -= ((aSY + aSHeight - mDecodedY2) * origDHeight) / origSHeight;
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aSHeight -= (aSY + aSHeight) - mDecodedY2;
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}
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if (aSY < mDecodedY1) {
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aDY += ((mDecodedY1 - aSY)*origDHeight)/origSHeight;
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aDY += ((mDecodedY1 - aSY) * origDHeight) / origSHeight;
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aSY = mDecodedY1;
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}
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@ -481,150 +478,142 @@ nsImageWin :: Draw(nsIRenderingContext &aContext, nsDrawingSurface aSurface,
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return NS_OK;
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// Translate to bottom-up coordinates for the source bitmap
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srcy = mBHead->biHeight - (aSY + aSHeight);
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PRInt32 srcy = mBHead->biHeight - (aSY + aSHeight);
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// if DC is not for a printer, and the image can be optimized,
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HDC TheHDC;
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((nsDrawingSurfaceWin *)aSurface)->GetDC(&TheHDC);
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if (!TheHDC)
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return NS_ERROR_FAILURE;
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// find out if the surface is a printer.
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PRInt32 canRaster;
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((nsDrawingSurfaceWin *)aSurface)->GetTECHNOLOGY(&canRaster);
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if (nsnull != TheHDC){
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PRBool didComposite = PR_FALSE;
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if (!mIsOptimized || nsnull==mHBitmap){
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rop = SRCCOPY;
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PRBool didComposite = PR_FALSE;
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if (!mIsOptimized || !mHBitmap) {
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DWORD rop = SRCCOPY;
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if (mAlphaBits) {
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if (1 == mAlphaDepth) {
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MONOBITMAPINFO bmi(mBHead->biWidth, mBHead->biHeight);
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if (nsnull != mAlphaBits){
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if (1==mAlphaDepth){
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if(canRaster == DT_RASPRINTER){
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MONOBITMAPINFO bmi(mBHead->biWidth, mBHead->biHeight);
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CompositeBitsInMemory(TheHDC,aDX,aDY,aDWidth,aDHeight,aSX,aSY,aSWidth,aSHeight,srcy,
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mAlphaBits,&bmi,mImageBits,mBHead,mNumPaletteColors);
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if (canRaster == DT_RASPRINTER) {
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CompositeBitsInMemory(TheHDC, aDX, aDY, aDWidth, aDHeight,
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aSX, aSY, aSWidth, aSHeight,
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srcy, mAlphaBits, &bmi, mImageBits, mBHead,
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mNumPaletteColors);
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didComposite = PR_TRUE;
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} else {
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// Put the mask down
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::StretchDIBits(TheHDC, aDX, aDY, aDWidth, aDHeight,
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aSX, srcy, aSWidth, aSHeight, mAlphaBits,
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(LPBITMAPINFO)&bmi, DIB_RGB_COLORS, SRCAND);
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rop = SRCPAINT;
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}
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} else if (8 == mAlphaDepth) {
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nsresult rv = DrawComposited(TheHDC, aDX, aDY, aDWidth, aDHeight,
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aSX, srcy, aSWidth, aSHeight);
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if (NS_FAILED(rv)) {
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((nsDrawingSurfaceWin *)aSurface)->ReleaseDC();
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return rv;
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}
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didComposite = PR_TRUE;
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}
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} // mAlphaBits
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// Put the Image down
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if (!didComposite) {
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::StretchDIBits(TheHDC, aDX, aDY, aDWidth, aDHeight,
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aSX, srcy, aSWidth, aSHeight, mImageBits,
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(LPBITMAPINFO)mBHead, 256 == mNumPaletteColors ?
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DIB_PAL_COLORS : DIB_RGB_COLORS, rop);
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}
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} else {
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// Optimized. mHBitmap contains the DDB
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DWORD rop = SRCCOPY;
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if (canRaster == DT_RASPRINTER) {
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// To Printer
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if (mAlphaBits && mAlphaDepth == 1) {
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MONOBITMAPINFO bmi(mBHead->biWidth, mBHead->biHeight);
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if (mImageBits) {
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CompositeBitsInMemory(TheHDC, aDX, aDY, aDWidth, aDHeight,
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aSX, aSY, aSWidth, aSHeight, srcy,
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mAlphaBits, &bmi, mImageBits, mBHead,
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mNumPaletteColors);
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didComposite = PR_TRUE;
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} else {
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ConvertDDBtoDIB(); // Create mImageBits
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if (mImageBits) {
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CompositeBitsInMemory(TheHDC, aDX, aDY, aDWidth, aDHeight,
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aSX, aSY, aSWidth, aSHeight, srcy,
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mAlphaBits,
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&bmi, mImageBits, mBHead,
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mNumPaletteColors);
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// Clean up the image bits
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delete [] mImageBits;
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mImageBits = nsnull;
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didComposite = PR_TRUE;
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} else {
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MONOBITMAPINFO bmi(mBHead->biWidth, mBHead->biHeight);
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::StretchDIBits(TheHDC, aDX, aDY, aDWidth, aDHeight,aSX, srcy,aSWidth, aSHeight, mAlphaBits,
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(LPBITMAPINFO)&bmi, DIB_RGB_COLORS, SRCAND);
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rop = SRCPAINT;
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NS_WARNING("Could not composite bits in memory because conversion to DIB failed\n");
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}
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}
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}
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} // mImageBits
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} // mAlphaBits && mAlphaDepth == 1
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if (!didComposite &&
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(GetDeviceCaps(TheHDC, RASTERCAPS) & (RC_BITBLT | RC_STRETCHBLT)))
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PrintDDB(aSurface, aDX, aDY, aDWidth, aDHeight, rop);
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} else {
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// we are going to the device that created this DDB
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if (PR_FALSE == didComposite){
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if (8==mAlphaDepth) {
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nsresult rv = DrawComposited(TheHDC, aDX, aDY, aDWidth, aDHeight,
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aSX, srcy, aSWidth, aSHeight);
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if (NS_FAILED(rv)) {
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((nsDrawingSurfaceWin *)aSurface)->ReleaseDC();
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return rv;
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}
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} else {
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::StretchDIBits(TheHDC, aDX, aDY, aDWidth, aDHeight,aSX, srcy, aSWidth, aSHeight, mImageBits,
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(LPBITMAPINFO)mBHead, 256 == mNumPaletteColors ? DIB_PAL_COLORS :
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DIB_RGB_COLORS, rop);
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}
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}
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}else{
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// Get srcDC from the drawing surface of aContext's (RenderingContext)
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// DeviceContext. Should be the same each time.
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nsIDeviceContext *dx;
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aContext.GetDeviceContext(dx);
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nsDrawingSurface ds;
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NS_STATIC_CAST(nsDeviceContextWin*, dx)->GetDrawingSurface(aContext, ds);
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nsDrawingSurfaceWin *srcDS = (nsDrawingSurfaceWin *)ds;
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HDC srcDC;
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if (nsnull != srcDS){
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srcDS->GetDC(&srcDC);
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rop = SRCCOPY;
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if (nsnull != mAlphaBits){
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if (1==mAlphaDepth){
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MONOBITMAPINFO bmi(mBHead->biWidth, mBHead->biHeight);
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if (canRaster == DT_RASPRINTER) {
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MONOBITMAPINFO bmi(mBHead->biWidth, mBHead->biHeight);
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if (mImageBits != nsnull) {
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CompositeBitsInMemory(TheHDC,aDX,aDY,aDWidth,aDHeight,aSX,aSY,aSWidth,aSHeight,srcy,
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mAlphaBits,&bmi,mImageBits,mBHead,mNumPaletteColors);
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didComposite = PR_TRUE;
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} else {
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ConvertDDBtoDIB(); // Create mImageBits
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if (mImageBits != nsnull) {
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CompositeBitsInMemory(TheHDC,aDX,aDY,aDWidth,aDHeight,aSX,aSY,aSWidth,aSHeight,srcy,
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mAlphaBits,&bmi,mImageBits,mBHead,mNumPaletteColors);
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// Clean up the image bits
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delete [] mImageBits;
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mImageBits = nsnull;
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didComposite = PR_TRUE;
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} else {
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NS_WARNING("Could not composite bits in memory because conversion to DIB failed\n");
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}
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}
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} else {
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::StretchDIBits(TheHDC, aDX, aDY, aDWidth, aDHeight,aSX, srcy, aSWidth, aSHeight, mAlphaBits,
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(LPBITMAPINFO)&bmi, DIB_RGB_COLORS, SRCAND);
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rop = SRCPAINT;
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}
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}
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}
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// if this is for a printer.. we have to convert it back to a DIB
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if (canRaster == DT_RASPRINTER){
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if (!(GetDeviceCaps(TheHDC,RASTERCAPS) &(RC_BITBLT | RC_STRETCHBLT))) {
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// we have an error with the printer not supporting a raster device
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} else {
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// if we did not convert to a DDB already
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if (nsnull == mHBitmap) {
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oldBits = (HBITMAP)::SelectObject(srcDC, mHBitmap);
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if (8 == mAlphaDepth) {
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BLENDFUNCTION blendFunction;
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blendFunction.BlendOp = AC_SRC_OVER;
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blendFunction.BlendFlags = 0;
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blendFunction.SourceConstantAlpha = 255;
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blendFunction.AlphaFormat = 1 /*AC_SRC_ALPHA*/;
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gAlphaBlend(TheHDC, aDX, aDY, aDWidth, aDHeight, srcDC, aSX, aSY, aSWidth, aSHeight, blendFunction);
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} else {
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::StretchBlt(TheHDC, aDX, aDY, aDWidth, aDHeight, srcDC, aSX, aSY,aSWidth, aSHeight, rop);
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}
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}else{
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if (! didComposite)
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PrintDDB(aSurface,aDX,aDY,aDWidth,aDHeight,rop);
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}
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}
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} else {
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// we are going to the device that created this DDB
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oldBits = (HBITMAP)::SelectObject(srcDC, mHBitmap);
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if (8 == mAlphaDepth) {
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BLENDFUNCTION blendFunction;
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blendFunction.BlendOp = AC_SRC_OVER;
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blendFunction.BlendFlags = 0;
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blendFunction.SourceConstantAlpha = 255;
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blendFunction.AlphaFormat = 1 /*AC_SRC_ALPHA*/;
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gAlphaBlend(TheHDC, aDX, aDY, aDWidth, aDHeight, srcDC, aSX, aSY, aSWidth, aSHeight, blendFunction);
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} else {
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::StretchBlt(TheHDC,aDX,aDY,aDWidth,aDHeight,srcDC,aSX,aSY,aSWidth,aSHeight,rop);
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}
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}
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::SelectObject(srcDC, oldBits);
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srcDS->ReleaseDC();
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if (!srcDS) {
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NS_RELEASE(dx);
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((nsDrawingSurfaceWin *)aSurface)->ReleaseDC();
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return NS_ERROR_FAILURE;
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}
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HDC srcDC;
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srcDS->GetDC(&srcDC);
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// Draw the Alpha/Mask
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if (mAlphaBits && mAlphaDepth == 1) {
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MONOBITMAPINFO bmi(mBHead->biWidth, mBHead->biHeight);
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::StretchDIBits(TheHDC, aDX, aDY, aDWidth, aDHeight,
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aSX, srcy, aSWidth, aSHeight, mAlphaBits,
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(LPBITMAPINFO)&bmi, DIB_RGB_COLORS, SRCAND);
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rop = SRCPAINT;
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}
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// Draw the Image
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HBITMAP oldBits = (HBITMAP)::SelectObject(srcDC, mHBitmap);
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if (8 == mAlphaDepth) {
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BLENDFUNCTION blendFunction;
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blendFunction.BlendOp = AC_SRC_OVER;
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blendFunction.BlendFlags = 0;
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blendFunction.SourceConstantAlpha = 255;
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blendFunction.AlphaFormat = 1; // AC_SRC_ALPHA
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gAlphaBlend(TheHDC, aDX, aDY, aDWidth, aDHeight,
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srcDC, aSX, aSY, aSWidth, aSHeight, blendFunction);
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} else {
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::StretchBlt(TheHDC, aDX, aDY, aDWidth, aDHeight,
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srcDC, aSX, aSY, aSWidth, aSHeight, rop);
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}
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::SelectObject(srcDC, oldBits);
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srcDS->ReleaseDC();
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NS_RELEASE(dx);
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}
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((nsDrawingSurfaceWin *)aSurface)->ReleaseDC();
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}
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((nsDrawingSurfaceWin *)aSurface)->ReleaseDC();
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return NS_OK;
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}
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