Use correct matrix to adjust blur radius for gpu

src/effects/SkBlurMaskFilter.cpp

 
 /*
  * Copyright 2006 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 "SkBlurMaskFilter.h"
 #include "SkBlurMask.h"
@@ skipping 523 matching lines @@
 
     // Outset srcRect and clipRect by 3 * sigma, to compute affected blur area.
     srcRect.outset(sigma3, sigma3);
     clipRect.outset(sigma3, sigma3);
     srcRect.intersect(clipRect);
     *maskRect = srcRect;
     return true;
 }
 
 bool SkBlurMaskFilterImpl::filterMaskGPU(GrTexture* src,
-                                         const SkMatrix& matrix,
+                                         const SkMatrix& ctm,
                                          const SkRect& maskRect,
                                          GrTexture** result,
                                          bool canOverwriteSrc) const {
     SkRect clipRect = SkRect::MakeWH(maskRect.width(), maskRect.height());
 
     GrContext* context = src->getContext();
 
     GrContext::AutoWideOpenIdentityDraw awo(context, NULL);
 
-    // FIXME: This isn't the right matrix.
-    SkScalar xformedSigma = this->computeXformedSigma(context->getMatrix());
+    SkScalar xformedSigma = this->computeXformedSigma(ctm);
     SkASSERT(xformedSigma > 0);
 
     // If we're doing a normal blur, we can clobber the pathTexture in the
     // gaussianBlur.  Otherwise, we need to save it for later compositing.
     bool isNormalBlur = (SkBlurMaskFilter::kNormal_BlurStyle == fBlurStyle);
     *result = SkGpuBlurUtils::GaussianBlur(context, src, isNormalBlur && canOverwriteSrc,
                                            clipRect, false, xformedSigma, xformedSigma);
     if (NULL == *result) {
         return false;
     }
@@ skipping 52 matching lines @@
     } else {
         str->append("None");
     }
     str->append("))");
 }
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkBlurMaskFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkBlurMaskFilterImpl)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END