Implement support for a Context parameter in image filters

src/effects/SkBlurImageFilter.cpp

Index: src/effects/SkBlurImageFilter.cpp
diff --git a/src/effects/SkBlurImageFilter.cpp b/src/effects/SkBlurImageFilter.cpp
index c5e3a78fbbf14f944d88169e01fe4f3f0134b4b4..adcb28f90d8f25ce2d5b3905eceaddacb799d424 100644
--- a/src/effects/SkBlurImageFilter.cpp
+++ b/src/effects/SkBlurImageFilter.cpp
@@ -134,11 +134,11 @@ static void getBox3Params(SkScalar s, int *kernelSize, int* kernelSize3, int *lo
 }
 
 bool SkBlurImageFilter::onFilterImage(Proxy* proxy,
-                                      const SkBitmap& source, const SkMatrix& ctm,
+                                      const SkBitmap& source, const Context& ctx,
                                       SkBitmap* dst, SkIPoint* offset) const {
     SkBitmap src = source;
     SkIPoint srcOffset = SkIPoint::Make(0, 0);
-    if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctm, &src, &srcOffset)) {
+    if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctx, &src, &srcOffset)) {
         return false;
     }
 
@@ -154,7 +154,7 @@ bool SkBlurImageFilter::onFilterImage(Proxy* proxy,
     SkIRect srcBounds, dstBounds;
     src.getBounds(&srcBounds);
     srcBounds.offset(srcOffset);
-    if (!this->applyCropRect(&srcBounds, ctm)) {
+    if (!this->applyCropRect(&srcBounds, ctx.ctm())) {
         return false;
     }
 
@@ -165,7 +165,7 @@ bool SkBlurImageFilter::onFilterImage(Proxy* proxy,
     }
 
     SkVector sigma, localSigma = SkVector::Make(fSigma.width(), fSigma.height());
-    ctm.mapVectors(&sigma, &localSigma, 1);
+    ctx.ctm().mapVectors(&sigma, &localSigma, 1);
 
     int kernelSizeX, kernelSizeX3, lowOffsetX, highOffsetX;
     int kernelSizeY, kernelSizeY3, lowOffsetY, highOffsetY;
@@ -250,23 +250,23 @@ bool SkBlurImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
     return true;
 }
 
-bool SkBlurImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
+bool SkBlurImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                        SkBitmap* result, SkIPoint* offset) const {
 #if SK_SUPPORT_GPU
     SkBitmap input = src;
     SkIPoint srcOffset = SkIPoint::Make(0, 0);
-    if (getInput(0) && !getInput(0)->getInputResultGPU(proxy, src, ctm, &input, &srcOffset)) {
+    if (getInput(0) && !getInput(0)->getInputResultGPU(proxy, src, ctx, &input, &srcOffset)) {
         return false;
     }
     GrTexture* source = input.getTexture();
     SkIRect rect;
     src.getBounds(&rect);
     rect.offset(srcOffset);
-    if (!this->applyCropRect(&rect, ctm)) {
+    if (!this->applyCropRect(&rect, ctx.ctm())) {
         return false;
     }
     SkVector sigma, localSigma = SkVector::Make(fSigma.width(), fSigma.height());
-    ctm.mapVectors(&sigma, &localSigma, 1);
+    ctx.ctm().mapVectors(&sigma, &localSigma, 1);
     offset->fX = rect.fLeft;
     offset->fY = rect.fTop;
     rect.offset(-srcOffset);