Apply the CTM to filter parameters for 4 pixel-moving 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"
 #include "SkFlattenableBuffers.h"
 #include "SkGpuBlurUtils.h"
 #include "SkBlurImage_opts.h"
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
 #include "SkImageFilterUtils.h"
 #endif
 
 SkBlurImageFilter::SkBlurImageFilter(SkFlattenableReadBuffer& buffer)
   : INHERITED(1, buffer) {
-    fSigma.fWidth = buffer.readScalar();
-    fSigma.fHeight = buffer.readScalar();
-    buffer.validate(SkScalarIsFinite(fSigma.fWidth) &&
-                    SkScalarIsFinite(fSigma.fHeight) &&
-                    (fSigma.fWidth >= 0) &&
-                    (fSigma.fHeight >= 0));
+    fSigma.fX = buffer.readScalar();
+    fSigma.fY = buffer.readScalar();
+    buffer.validate(SkScalarIsFinite(fSigma.fX) &&
+                    SkScalarIsFinite(fSigma.fY) &&
+                    (fSigma.fX >= 0) &&
+                    (fSigma.fY >= 0));
 }
 
 SkBlurImageFilter::SkBlurImageFilter(SkScalar sigmaX,
                                      SkScalar sigmaY,
                                      SkImageFilter* input,
                                      const CropRect* cropRect)
-    : INHERITED(input, cropRect), fSigma(SkSize::Make(sigmaX, sigmaY)) {
+    : INHERITED(input, cropRect), fSigma(SkVector::Make(sigmaX, sigmaY)) {
     SkASSERT(sigmaX >= 0 && sigmaY >= 0);
 }
 
 void SkBlurImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
-    buffer.writeScalar(fSigma.fWidth);
-    buffer.writeScalar(fSigma.fHeight);
+    buffer.writeScalar(fSigma.fX);
+    buffer.writeScalar(fSigma.fY);
 }
 
 enum BlurDirection {
     kX, kY
 };
 
 /**
  *
  * In order to make memory accesses cache-friendly, we reorder the passes to
  * use contiguous memory reads wherever possible.
@@ skipping 107 matching lines @@
         return false;
     }
 
     dst->setConfig(src.config(), srcBounds.width(), srcBounds.height());
     dst->getBounds(&dstBounds);
     dst->allocPixels();
     if (!dst->getPixels()) {
         return false;
     }
 
+    SkVector sigma;
+    ctm.mapVectors(&sigma, &fSigma, 1);
+
     int kernelSizeX, kernelSizeX3, lowOffsetX, highOffsetX;
     int kernelSizeY, kernelSizeY3, lowOffsetY, highOffsetY;
-    getBox3Params(fSigma.width(), &kernelSizeX, &kernelSizeX3, &lowOffsetX, &highOffsetX);
-    getBox3Params(fSigma.height(), &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;
     }
 
     if (kernelSizeX == 0 && kernelSizeY == 0) {
         src.copyTo(dst, dst->config());
         offset->fX = srcBounds.fLeft;
         offset->fY = srcBounds.fTop;
         return true;
@@ skipping 46 matching lines @@
     SkBitmap input;
     if (!SkImageFilterUtils::GetInputResultGPU(getInput(0), proxy, src, ctm, &input, offset)) {
         return false;
     }
     GrTexture* source = input.getTexture();
     SkIRect rect;
     src.getBounds(&rect);
     if (!this->applyCropRect(&rect, ctm)) {
         return false;
     }
+    SkVector sigma;
+    ctm.mapVectors(&sigma, &fSigma, 1);
     SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(source->getContext(),
                                                              source,
                                                              false,
                                                              SkRect::Make(rect),
                                                              true,
-                                                             fSigma.width(),
-                                                             fSigma.height()));
+                                                             sigma.x(),
+                                                             sigma.y()));
     offset->fX = rect.fLeft;
     offset->fY = rect.fTop;
     return SkImageFilterUtils::WrapTexture(tex, rect.width(), rect.height(), result);
 #else
     SkDEBUGFAIL("Should not call in GPU-less build");
     return false;
 #endif
 }