This patch implements a crop rect for SkImageFilter. It has been implemented for SkColorFilterImageFilter and SkBlurImageFilter as examples.
In order to preserve the immutability of SkImageFilters, the crop rect is passed as a constructor parameter. If NULL (the default), the bounds of the input image are used, as before.
This also tightens up the boundary handling for SkImageBlurFilter on the GPU backend. Where we were previously using clamping semantics, we now respect decal semantics (so we don't oversaturate the edges). This brings the GPU and raster backends into closer alignment, but will require some new baselines for the GPU tests.
At a minimum, the following tests will need new baselines: imageblur, imagefiltersbase, imagefilterscropped, spritebitmap.
R=reed@google.com
Committed: https://code.google.com/p/skia/source/detail?r=10251
Review URL: https://codereview.chromium.org/19775006
git-svn-id: http://skia.googlecode.com/svn/trunk@10338 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/SkGpuBlurUtils.h b/src/effects/SkGpuBlurUtils.h
index 6769d56..98be813 100644
--- a/src/effects/SkGpuBlurUtils.h
+++ b/src/effects/SkGpuBlurUtils.h
@@ -25,6 +25,8 @@
* @param canClobberSrc If true, srcTexture may be overwritten, and
* may be returned as the result.
* @param rect The destination rectangle.
+ * @param cropToRect If true, do not sample any pixels outside the
+ * source rect.
* @param sigmaX The blur's standard deviation in X.
* @param sigmaY The blur's standard deviation in Y.
* @return the blurred texture, which may be srcTexture reffed, or a
@@ -34,6 +36,7 @@
GrTexture* srcTexture,
bool canClobberSrc,
const SkRect& rect,
+ bool cropToRect,
float sigmaX,
float sigmaY);
#endif