tunnel down texture-size-constraint to imagefilters

src/effects/SkBlurMaskFilter.cpp

Index: src/effects/SkBlurMaskFilter.cpp
diff --git a/src/effects/SkBlurMaskFilter.cpp b/src/effects/SkBlurMaskFilter.cpp
index f42b8bfbfcd4ff735856152fa162007ddf8090a8..a4c5e7fc95172edaba5461b48df4c14c662ea64d 100644
--- a/src/effects/SkBlurMaskFilter.cpp
+++ b/src/effects/SkBlurMaskFilter.cpp
@@ -67,7 +67,8 @@ public:
                        const SkMatrix& ctm,
                        const SkRect& maskRect,
                        GrTexture** result,
-                       bool canOverwriteSrc) const override;
+                       bool canOverwriteSrc,
+                       GrTextureProvider::SizeConstraint) const override;

[Stephen White, 2015/10/21 21:06:53]

It seems a little strange that we need to modify mask filters to satisfy image
filters. Could we just always request an approx-match in the GaussianBlur call
for mask filters, and avoid plumbing this through?

 #endif
 
     void computeFastBounds(const SkRect&, SkRect*) const override;
@@ -1222,7 +1223,8 @@ bool SkBlurMaskFilterImpl::filterMaskGPU(GrTexture* src,
                                          const SkMatrix& ctm,
                                          const SkRect& maskRect,
                                          GrTexture** result,
-                                         bool canOverwriteSrc) const {
+                                         bool canOverwriteSrc,
+                                         GrTextureProvider::SizeConstraint constraint) const {
     SkRect clipRect = SkRect::MakeWH(maskRect.width(), maskRect.height());
 
     GrContext* context = src->getContext();
@@ -1234,7 +1236,8 @@ bool SkBlurMaskFilterImpl::filterMaskGPU(GrTexture* src,
     // gaussianBlur.  Otherwise, we need to save it for later compositing.
     bool isNormalBlur = (kNormal_SkBlurStyle == fBlurStyle);
     *result = SkGpuBlurUtils::GaussianBlur(context, src, isNormalBlur && canOverwriteSrc,
-                                           clipRect, false, xformedSigma, xformedSigma);
+                                           clipRect, false, xformedSigma, xformedSigma,
+                                           constraint);
     if (nullptr == *result) {
         return false;
     }