Apply the layer's image filter to the hoisted image

src/image/SkSurface_Gpu.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkSurface_Base.h"
 #include "SkImagePriv.h"
 #include "SkImage_Base.h"
 #include "SkCanvas.h"
 #include "SkGpuDevice.h"
+#include "SkSurface_Gpu.h"
 
 #if SK_SUPPORT_GPU
 
-class SkSurface_Gpu : public SkSurface_Base {
-public:
-    SK_DECLARE_INST_COUNT(SkSurface_Gpu)
-
-    SkSurface_Gpu(GrRenderTarget*, const SkSurfaceProps*, bool doClear);
-    virtual ~SkSurface_Gpu();
-
-    virtual SkCanvas* onNewCanvas() SK_OVERRIDE;
-    virtual SkSurface* onNewSurface(const SkImageInfo&) SK_OVERRIDE;
-    virtual SkImage* onNewImageSnapshot() SK_OVERRIDE;
-    virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y,
-                        const SkPaint*) SK_OVERRIDE;
-    virtual void onCopyOnWrite(ContentChangeMode) SK_OVERRIDE;
-    virtual void onDiscard() SK_OVERRIDE;
-
-private:
-    SkGpuDevice* fDevice;
-
-    typedef SkSurface_Base INHERITED;
-};
-
 ///////////////////////////////////////////////////////////////////////////////
 
 SkSurface_Gpu::SkSurface_Gpu(GrRenderTarget* renderTarget, const SkSurfaceProps* props,
                              bool doClear)
         : INHERITED(renderTarget->width(), renderTarget->height(), props) {
     int deviceFlags = 0;
     deviceFlags |= this->props().isUseDistanceFieldFonts() ? SkGpuDevice::kDFText_Flag : 0;
     fDevice = SkGpuDevice::Create(renderTarget, this->props(), deviceFlags);
 
     if (kRGB_565_GrPixelConfig != renderTarget->config() && doClear) {
@@ skipping 109 matching lines @@
     SkAutoTUnref<GrTexture> tex(ctx->refScratchTexture(desc, GrContext::kExact_ScratchTexMatch));
 
     if (NULL == tex) {
         return NULL;
     }
 
     return SkNEW_ARGS(SkSurface_Gpu, (tex->asRenderTarget(), props, true));
 }
 
 #endif