Implement support for a Context parameter in image filters

src/effects/SkBlurImageFilter.cpp

 /*
  * Copyright 2011 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkBlurImageFilter.h"
 #include "SkColorPriv.h"
@@ skipping 116 matching lines @@
         *lowOffset = *highOffset = (d - 1) / 2;
         *kernelSize3 = d;
     } else {
         *highOffset = d / 2;
         *lowOffset = *highOffset - 1;
         *kernelSize3 = d + 1;
     }
 }
 
 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;
     }
 
     if (src.colorType() != kPMColor_SkColorType) {
         return false;
     }
 
     SkAutoLockPixels alp(src);
     if (!src.getPixels()) {
         return false;
     }
 
     SkIRect srcBounds, dstBounds;
     src.getBounds(&srcBounds);
     srcBounds.offset(srcOffset);
-    if (!this->applyCropRect(&srcBounds, ctm)) {
+    if (!this->applyCropRect(&srcBounds, ctx.ctm())) {
         return false;
     }
 
     dst->setConfig(src.config(), srcBounds.width(), srcBounds.height());
     dst->getBounds(&dstBounds);
     if (!dst->allocPixels()) {
         return false;
     }
 
     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;
     getBox3Params(sigma.x(), &kernelSizeX, &kernelSizeX3, &lowOffsetX, &highOffsetX);
     getBox3Params(sigma.y(), &kernelSizeY, &kernelSizeY3, &lowOffsetY, &highOffsetY);
 
     if (kernelSizeX < 0 || kernelSizeY < 0) {
         return false;
     }
 
@@ skipping 64 matching lines @@
         return false;
     }
     SkVector sigma, localSigma = SkVector::Make(fSigma.width(), fSigma.height());
     ctm.mapVectors(&sigma, &localSigma, 1);
     bounds.outset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))),
                   SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3))));
     *dst = bounds;
     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);
     SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(source->getContext(),
                                                              source,
                                                              false,
                                                              SkRect::Make(rect),
                                                              true,
                                                              sigma.x(),
                                                              sigma.y()));
     WrapTexture(tex, rect.width(), rect.height(), result);
     return true;
 #else
     SkDEBUGFAIL("Should not call in GPU-less build");
     return false;
 #endif
 }