Implement support for a Context parameter in image filters

src/effects/SkDisplacementMapEffect.cpp

Index: src/effects/SkDisplacementMapEffect.cpp
diff --git a/src/effects/SkDisplacementMapEffect.cpp b/src/effects/SkDisplacementMapEffect.cpp
index 15e93c11cdd336d0b76420e3222bcf8e8490b603..a1c18c647ef6c168b222ead68bf321a872e8cdee 100644
--- a/src/effects/SkDisplacementMapEffect.cpp
+++ b/src/effects/SkDisplacementMapEffect.cpp
@@ -194,15 +194,15 @@ void SkDisplacementMapEffect::flatten(SkWriteBuffer& buffer) const {
 
 bool SkDisplacementMapEffect::onFilterImage(Proxy* proxy,
                                             const SkBitmap& src,
-                                            const SkMatrix& ctm,
+                                            const Context& ctx,
                                             SkBitmap* dst,
                                             SkIPoint* offset) const {
     SkBitmap displ = src, color = src;
     const SkImageFilter* colorInput = getColorInput();
     const SkImageFilter* displInput = getDisplacementInput();
     SkIPoint colorOffset = SkIPoint::Make(0, 0), displOffset = SkIPoint::Make(0, 0);
-    if ((colorInput && !colorInput->filterImage(proxy, src, ctm, &color, &colorOffset)) ||
-        (displInput && !displInput->filterImage(proxy, src, ctm, &displ, &displOffset))) {
+    if ((colorInput && !colorInput->filterImage(proxy, src, ctx, &color, &colorOffset)) ||
+        (displInput && !displInput->filterImage(proxy, src, ctx, &displ, &displOffset))) {
         return false;
     }
     if ((displ.colorType() != kPMColor_SkColorType) ||
@@ -217,13 +217,13 @@ bool SkDisplacementMapEffect::onFilterImage(Proxy* proxy,
     SkIRect bounds;
     color.getBounds(&bounds);
     bounds.offset(colorOffset);
-    if (!this->applyCropRect(&bounds, ctm)) {
+    if (!this->applyCropRect(&bounds, ctx.ctm())) {
         return false;
     }
     SkIRect displBounds;
     displ.getBounds(&displBounds);
     displBounds.offset(displOffset);
-    if (!this->applyCropRect(&displBounds, ctm)) {
+    if (!this->applyCropRect(&displBounds, ctx.ctm())) {
         return false;
     }
     if (!bounds.intersect(displBounds)) {
@@ -236,7 +236,7 @@ bool SkDisplacementMapEffect::onFilterImage(Proxy* proxy,
     }
 
     SkVector scale = SkVector::Make(fScale, fScale);
-    ctm.mapVectors(&scale, 1);
+    ctx.ctm().mapVectors(&scale, 1);
     SkIRect colorBounds = bounds;
     colorBounds.offset(-colorOffset);
 
@@ -348,11 +348,11 @@ private:
     typedef GrEffect INHERITED;
 };
 
-bool SkDisplacementMapEffect::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
+bool SkDisplacementMapEffect::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                              SkBitmap* result, SkIPoint* offset) const {
     SkBitmap colorBM = src;
     SkIPoint colorOffset = SkIPoint::Make(0, 0);
-    if (getColorInput() && !getColorInput()->getInputResultGPU(proxy, src, ctm, &colorBM,
+    if (getColorInput() && !getColorInput()->getInputResultGPU(proxy, src, ctx, &colorBM,
                                                                &colorOffset)) {
         return false;
     }
@@ -360,7 +360,7 @@ bool SkDisplacementMapEffect::filterImageGPU(Proxy* proxy, const SkBitmap& src,
     SkBitmap displacementBM = src;
     SkIPoint displacementOffset = SkIPoint::Make(0, 0);
     if (getDisplacementInput() &&
-        !getDisplacementInput()->getInputResultGPU(proxy, src, ctm, &displacementBM,
+        !getDisplacementInput()->getInputResultGPU(proxy, src, ctx, &displacementBM,
                                                    &displacementOffset)) {
         return false;
     }
@@ -379,17 +379,17 @@ bool SkDisplacementMapEffect::filterImageGPU(Proxy* proxy, const SkBitmap& src,
     GrContext::AutoRenderTarget art(context, dst->asRenderTarget());
 
     SkVector scale = SkVector::Make(fScale, fScale);
-    ctm.mapVectors(&scale, 1);
+    ctx.ctm().mapVectors(&scale, 1);
     SkIRect bounds;
     colorBM.getBounds(&bounds);
     bounds.offset(colorOffset);
-    if (!this->applyCropRect(&bounds, ctm)) {
+    if (!this->applyCropRect(&bounds, ctx.ctm())) {
         return false;
     }
     SkIRect displBounds;
     displacementBM.getBounds(&displBounds);
     displBounds.offset(displacementOffset);
-    if (!this->applyCropRect(&displBounds, ctm)) {
+    if (!this->applyCropRect(&displBounds, ctx.ctm())) {
         return false;
     }
     if (!bounds.intersect(displBounds)) {