Smallest possible desktop application that uses Skia to render stuff.

experimental/SkiaExamples/BaseExample.h

+/*
+ * Copyright 2013 Google Inc.
+ *
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ */
+
+#ifndef BaseExample_DEFINED
+#define BaseExample_DEFINED
+
+#include "SkWindow.h"
+
+class GrContext;
+struct GrGLInterface;
+class GrRenderTarget;
+class SkCanvas;
+
+class BaseExample : public SkOSWindow {
+public:
+    enum DeviceType {
+        kRaster_DeviceType,
+        kGPU_DeviceType,
+    };
+    BaseExample(void* hWnd, int argc, char** argv);
+
+    // Changes the device type of the object.
+    bool setupBackend(DeviceType type);
+    void tearDownBackend();
+
+    DeviceType getDeviceType() const { return fType; }
+
+protected:
+    // Your class should override this method to do its thing.
+    virtual void draw(SkCanvas* canvas) SK_OVERRIDE;
+
+    void setInvalDelay(SkMSec ms);
+
+    virtual void onSizeChange() SK_OVERRIDE;
+
+#if defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_WIN)
+    virtual void onHandleInval(const SkIRect&) SK_OVERRIDE;
+#endif
+
+    SkCanvas* createCanvas() SK_OVERRIDE;
+
+private:
+    SkMSec fDelayMs;
+    void setupRenderTarget();
+
+    DeviceType fType;
+
+    GrContext* fContext;
+    GrRenderTarget* fRenderTarget;
+    AttachmentInfo fAttachmentInfo;
+    const GrGLInterface* fInterface;
+    typedef SkOSWindow INHERITED;
+};
+#endif
+