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Fix a case missed in r3198 where left/right direction of setOrthog matters (matrix computed from a degenerate quad).

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git-svn-id: http://skia.googlecode.com/svn/trunk@3200 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
bsalomon@google.com 2012-02-15 18:49:41 +00:00
parent 60abb078e5
commit 20e542e00e
1 changed files with 5 additions and 2 deletions
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7
src/gpu/GrPathUtils.cpp
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@ -254,8 +254,11 @@ void GrPathUtils::quadDesignSpaceToUVCoordsMatrix(const SkPoint qPts[3],
// We could have a tolerance here, not sure if it would improve anything
if (maxD > 0) {
// Set the matrix to give (u = 0, v = distance_to_line)
GrVec lineVec = qPts[maxEdge] - qPts[(maxEdge + 1)%3];
lineVec.setOrthog(lineVec);
GrVec lineVec = qPts[(maxEdge + 1)%3] - qPts[maxEdge];
// when looking from the point 0 down the line we want positive
// distances to be to the left. This matches the non-degenerate
// case.
lineVec.setOrthog(lineVec, GrPoint::kLeft_Side);
lineVec.dot(qPts[0]);
matrix->setAll(0, 0, 0,
lineVec.fX, lineVec.fY, -lineVec.dot(qPts[maxEdge]),