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Bug 637852. Part 2: Add BaseRect::ScaleInverseRoundOut API. r=joe

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This commit is contained in:
Robert O'Callahan 2011-06-23 00:11:27 +12:00
parent 29044a8c64
commit ac135884a6
1 changed files with 10 additions and 0 deletions
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10
gfx/src/BaseRect.h
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@ -305,6 +305,16 @@ struct BaseRect {
width = right - x;
height = bottom - y;
}
void ScaleInverseRoundOut(double aScale) { ScaleInverseRoundOut(aScale, aScale); }
void ScaleInverseRoundOut(double aXScale, double aYScale)
{
T right = static_cast<T>(ceil(double(XMost()) / aXScale));
T bottom = static_cast<T>(ceil(double(YMost()) / aYScale));
x = static_cast<T>(floor(double(x) / aXScale));
y = static_cast<T>(floor(double(y) / aYScale));
width = right - x;
height = bottom - y;
}
private:
// Do not use the default operator== or operator!= !