In image filters, apply the CTM and offset to the crop rect. This is necessary to compensate for bo…

src/core/SkCanvas.cpp

 
 /*
  * Copyright 2008 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 "SkCanvas.h"
@@ skipping 981 matching lines @@
     LOOPER_BEGIN_DRAWDEVICE(*paint, SkDrawFilter::kBitmap_Type)
     while (iter.next()) {
         SkDevice* dstDev = iter.fDevice;
         paint = &looper.paint();
         SkImageFilter* filter = paint->getImageFilter();
         SkIPoint pos = { x - iter.getX(), y - iter.getY() };
         if (filter && !dstDev->canHandleImageFilter(filter)) {
             SkDeviceImageFilterProxy proxy(dstDev);
             SkBitmap dst;
             const SkBitmap& src = srcDev->accessBitmap(false);
-            if (filter->filterImage(&proxy, src, *iter.fMatrix, &dst, &pos)) {
+            SkMatrix matrix = *iter.fMatrix;
+            matrix.postTranslate(SkIntToScalar(-x), SkIntToScalar(-y));
+            if (filter->filterImage(&proxy, src, matrix, &dst, &pos)) {
                 SkPaint tmpUnfiltered(*paint);
                 tmpUnfiltered.setImageFilter(NULL);
                 dstDev->drawSprite(iter, dst, pos.x(), pos.y(), tmpUnfiltered);
             }
         } else {
             dstDev->drawDevice(iter, srcDev, pos.x(), pos.y(), *paint);
         }
     }
     LOOPER_END
 }
@@ skipping 14 matching lines @@
 
     LOOPER_BEGIN_DRAWDEVICE(*paint, SkDrawFilter::kBitmap_Type)
 
     while (iter.next()) {
         paint = &looper.paint();
         SkImageFilter* filter = paint->getImageFilter();
         SkIPoint pos = { x - iter.getX(), y - iter.getY() };
         if (filter && !iter.fDevice->canHandleImageFilter(filter)) {
             SkDeviceImageFilterProxy proxy(iter.fDevice);
             SkBitmap dst;
-            if (filter->filterImage(&proxy, bitmap, *iter.fMatrix,
-                                    &dst, &pos)) {
+            SkMatrix matrix = *iter.fMatrix;
+            matrix.postTranslate(SkIntToScalar(-x), SkIntToScalar(-y));
+            if (filter->filterImage(&proxy, bitmap, matrix, &dst, &pos)) {
                 SkPaint tmpUnfiltered(*paint);
                 tmpUnfiltered.setImageFilter(NULL);
                 iter.fDevice->drawSprite(iter, dst, pos.x(), pos.y(),
                                          tmpUnfiltered);
             }
         } else {
             iter.fDevice->drawSprite(iter, bitmap, pos.x(), pos.y(), *paint);
         }
     }
     LOOPER_END
@@ skipping 1170 matching lines @@
     return *paint;
 }
 
 const SkRegion& SkCanvas::LayerIter::clip() const { return fImpl->getClip(); }
 int SkCanvas::LayerIter::x() const { return fImpl->getX(); }
 int SkCanvas::LayerIter::y() const { return fImpl->getY(); }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 SkCanvas::ClipVisitor::~ClipVisitor() { }