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Regression of Bug 186103. r=ere, sr=tor. Don't draw beyond tile area.

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git-svn-id: svn://10.0.0.236/trunk@136546 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
paper%animecity.nu
2003-01-17 23:28:19 +00:00
parent 76126ff05f
commit 5248a4a5f7
1 changed files with 11 additions and 8 deletions
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19
mozilla/gfx/src/windows/nsImageWin.cpp
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@@ -1056,13 +1056,14 @@ nsImageWin::ProgressiveDoubleBlit(nsDrawingSurface aSurface,
// now duplicate our tile into the background
PRInt32 w, h;
if (mAlphaDepth == 1) {
for (PRInt32 y = aY0; y < aY1; y += srcRect.height) {
h = PR_MIN(srcRect.height, aY1 - y);
for (PRInt32 x = aX0; x < aX1; x += srcRect.width) {
::BitBlt(theHDC, x, y, srcRect.width, srcRect.height,
maskDC, 0, 0, SRCAND);
::BitBlt(theHDC, x, y, srcRect.width, srcRect.height,
offDC, 0, 0, SRCPAINT);
w = PR_MIN(srcRect.width, aX1 - x);
::BitBlt(theHDC, x, y, w, h, maskDC, 0, 0, SRCAND);
::BitBlt(theHDC, x, y, w, h, offDC, 0, 0, SRCPAINT);
}
}
// Destroy Alpha/Mask GDI Object
@@ -1076,16 +1077,18 @@ nsImageWin::ProgressiveDoubleBlit(nsDrawingSurface aSurface,
blendFunction.SourceConstantAlpha = 255;
blendFunction.AlphaFormat = 1;
for (PRInt32 y = aY0; y < aY1; y += srcRect.height) {
h = PR_MIN(srcRect.height, aY1 - y);
for (PRInt32 x = aX0; x < aX1; x += srcRect.width) {
gAlphaBlend(theHDC, x, y, srcRect.width, srcRect.height,
offDC, 0, 0, srcRect.width, srcRect.height, blendFunction);
w = PR_MIN(srcRect.width, aX1 - x);
gAlphaBlend(theHDC, x, y, w, h, offDC, 0, 0, w, h, blendFunction);
}
}
} else {
for (PRInt32 y = aY0; y < aY1; y += srcRect.height) {
h = PR_MIN(srcRect.height, aY1 - y);
for (PRInt32 x = aX0; x < aX1; x += srcRect.width) {
::BitBlt(theHDC, x, y, srcRect.width, srcRect.height,
offDC, 0, 0, SRCCOPY);
w = PR_MIN(srcRect.width, aX1 - x);
::BitBlt(theHDC, x, y, w, h, offDC, 0, 0, SRCCOPY);
}
}
}