example/HelloWorld.h

   1 /*
   2  * Copyright 2015 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 HelloWorld_DEFINED
  11 #define HelloWorld_DEFINED
  12
  13 #include "SkSurface.h"
  14 #include "SkWindow.h"
  15
  16 class GrContext;
  17 struct GrGLInterface;
  18 class GrRenderTarget;
  19 class SkCanvas;
  20
  21 class HelloWorldWindow : public SkOSWindow {
  22 public:
  23     enum DeviceType {
  24         kRaster_DeviceType,
  25         kGPU_DeviceType,
  26     };
  27     HelloWorldWindow(void* hwnd);
  28     virtual ~HelloWorldWindow() override;
  29
  30     // Changes the device type of the object.
  31     bool setUpBackend();
  32
  33     DeviceType getDeviceType() const { return fType; }
  34
  35 protected:
  36     SkSurface* createSurface() override {
  37         if (kGPU_DeviceType == fType) {
  38             SkSurfaceProps props(INHERITED::getSurfaceProps());
  39             return SkSurface::NewRenderTargetDirect(fRenderTarget, &props);
  40         }
  41         static const SkImageInfo info = SkImageInfo::MakeN32Premul(
  42                 SkScalarRoundToInt(this->width()), SkScalarRoundToInt(this->height()));
  43         return fSurface = SkSurface::NewRaster(info);
  44    }
  45
  46     void draw(SkCanvas* canvas) override;
  47     void drawContents(SkCanvas* canvas);
  48
  49     void onSizeChange() override;
  50
  51 private:
  52     bool findNextMatch();  // Set example to the first one that matches FLAGS_match.
  53     void setTitle();
  54     void setUpRenderTarget();
  55     bool onHandleChar(SkUnichar unichar) override;
  56     void tearDownBackend();
  57
  58     // draw contents
  59     SkScalar fRotationAngle;
  60
  61     // support framework
  62     DeviceType fType;
  63     SkSurface* fSurface;
  64     GrContext* fContext;
  65     GrRenderTarget* fRenderTarget;
  66     AttachmentInfo fAttachmentInfo;
  67     const GrGLInterface* fInterface;
  68
  69     typedef SkOSWindow INHERITED;
  70 };
  71
  72 #endif