Fix recursive GPU processing for SkImageFilter. Plumb through the

SkImageFilter::Proxy parameter to the GPU recursion path.  Extract
DeviceImageFilterProxy from SkCanvas.cpp into its own .h, and rename it.

https://codereview.appspot.com/6575059/



git-svn-id: http://skia.googlecode.com/svn/trunk@5720 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 34 insertions, 0 deletions

diff --git a/src/core/SkDeviceImageFilterProxy.h b/src/core/SkDeviceImageFilterProxy.h
new file mode 100644
index 0000000000..98a120cd0d
--- /dev/null
+++ b/src/core/SkDeviceImageFilterProxy.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2012 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.
+ */
+
+#ifndef SkDeviceImageFilterProxy_DEFINED
+#define SkDeviceImageFilterProxy_DEFINED
+
+#include "SkImageFilter.h"
+
+class SkDeviceImageFilterProxy : public SkImageFilter::Proxy {
+public:
+    SkDeviceImageFilterProxy(SkDevice* device) : fDevice(device) {}
+
+    virtual SkDevice* createDevice(int w, int h) SK_OVERRIDE {
+        return fDevice->createCompatibleDevice(SkBitmap::kARGB_8888_Config,
+                                               w, h, false);
+    }
+    virtual bool canHandleImageFilter(SkImageFilter* filter) SK_OVERRIDE {
+        return fDevice->canHandleImageFilter(filter);
+    }
+    virtual bool filterImage(SkImageFilter* filter, const SkBitmap& src,
+                             const SkMatrix& ctm,
+                             SkBitmap* result, SkIPoint* offset) SK_OVERRIDE {
+        return fDevice->filterImage(filter, src, ctm, result, offset);
+    }
+
+private:
+    SkDevice* fDevice;
+};
+
+#endif