Home | History | Annotate | Download | only in SkiaExamples 
      1 /*
      2  * Copyright 2013 Google Inc.
      3  *
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  *
      8  */
      9 
     10 #ifndef SkExample_DEFINED
     11 #define SkExample_DEFINED
     12 
     13 #include "SkWindow.h"
     14 #include "SkTRegistry.h"
     15 
     16 class GrContext;
     17 struct GrGLInterface;
     18 class GrRenderTarget;
     19 class SkCanvas;
     20 class SkExampleWindow;
     21 
     22 class SkExample : SkNoncopyable {
     23 public:
     24     SkExample(SkExampleWindow* window) : fWindow(window) {}
     25 
     26     virtual ~SkExample() {}
     27 
     28     // Your class should override this method to do its thing.
     29     virtual void draw(SkCanvas* canvas) = 0;
     30 
     31     SkString getName() { return fName; };
     32     // Use this public registry to tell the world about your sample.
     33     typedef SkTRegistry<SkExample*(*)(SkExampleWindow*)> Registry;
     34 
     35 protected:
     36     SkExampleWindow* fWindow;
     37     SkString fName;
     38 };
     39 
     40 class SkExampleWindow : public SkOSWindow {
     41 public:
     42     enum DeviceType {
     43         kRaster_DeviceType,
     44         kGPU_DeviceType,
     45     };
     46     SkExampleWindow(void* hwnd);
     47 
     48     // Changes the device type of the object.
     49     bool setupBackend(DeviceType type);
     50     void tearDownBackend();
     51 
     52     DeviceType getDeviceType() const { return fType; }
     53 
     54 protected:
     55     virtual void draw(SkCanvas* canvas) SK_OVERRIDE;
     56 
     57     virtual void onSizeChange() SK_OVERRIDE;
     58 
     59 #ifdef SK_BUILD_FOR_WIN
     60     virtual void onHandleInval(const SkIRect&) SK_OVERRIDE;
     61 #endif
     62 
     63     SkCanvas* createCanvas() SK_OVERRIDE;
     64 
     65 private:
     66     bool findNextMatch();  // Set example to the first one that matches FLAGS_match.
     67     void setupRenderTarget();
     68     bool onHandleChar(SkUnichar unichar) SK_OVERRIDE;
     69 
     70     DeviceType fType;
     71 
     72     SkExample* fCurrExample;
     73     const SkExample::Registry* fRegistry;
     74     GrContext* fContext;
     75     GrRenderTarget* fRenderTarget;
     76     AttachmentInfo fAttachmentInfo;
     77     const GrGLInterface* fInterface;
     78 
     79     typedef SkOSWindow INHERITED;
     80 };
     81 
     82 #endif
     83