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Side by Side Diff: experimental/SkiaExamples/BaseExample.cpp

Issue 18574002: SkiaExamples improvements. (Closed) Base URL: https://skia.googlecode.com/svn/trunk
Patch Set: Support for multiple SkExamples Created 7 years, 5 months ago
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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 #include "BaseExample.h"
11
12 #include "gl/GrGLUtil.h"
13 #include "gl/GrGLDefines.h"
14 #include "gl/GrGLInterface.h"
15 #include "SkApplication.h"
16 #include "SkGpuDevice.h"
17 #include "SkGraphics.h"
18
19 void application_init() {
20 SkGraphics::Init();
21 SkEvent::Init();
22 }
23
24 void application_term() {
25 SkEvent::Term();
26 SkGraphics::Term();
27 }
28
29 BaseExample::BaseExample(void* hWnd, int argc, char** argv)
30 : INHERITED(hWnd) {}
31
32 void BaseExample::tearDownBackend() {
33 if (kGPU_DeviceType == fType) {
34 SkSafeUnref(fContext);
35 fContext = NULL;
36
37 SkSafeUnref(fInterface);
38 fInterface = NULL;
39
40 SkSafeUnref(fRenderTarget);
41 fRenderTarget = NULL;
42
43 detach();
44 }
45 }
46
47 bool BaseExample::setupBackend(DeviceType type) {
48 fType = type;
49
50 this->setConfig(SkBitmap::kARGB_8888_Config);
51 this->setVisibleP(true);
52 this->setClipToBounds(false);
53
54 bool result = attach(kNativeGL_BackEndType, 0 /*msaa*/, &fAttachmentInfo);
55 if (false == result) {
56 SkDebugf("Not possible to create backend.\n");
57 detach();
58 return false;
59 }
60
61 fInterface = GrGLCreateNativeInterface();
62
63 SkASSERT(NULL != fInterface);
64
65 fContext = GrContext::Create(kOpenGL_GrBackend, (GrBackendContext)fInterface );
66 SkASSERT(NULL != fContext);
67
68 setupRenderTarget();
69
70 return true;
71 }
72
73 void BaseExample::setupRenderTarget() {
74 GrBackendRenderTargetDesc desc;
75 desc.fWidth = SkScalarRound(width());
76 desc.fHeight = SkScalarRound(height());
77 desc.fConfig = kSkia8888_GrPixelConfig;
78 desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
79 desc.fSampleCnt = fAttachmentInfo.fSampleCount;
80 desc.fStencilBits = fAttachmentInfo.fStencilBits;
81
82 GrGLint buffer;
83 GR_GL_GetIntegerv(fInterface, GR_GL_FRAMEBUFFER_BINDING, &buffer);
84 desc.fRenderTargetHandle = buffer;
85
86 fRenderTarget = fContext->wrapBackendRenderTarget(desc);
87
88 fContext->setRenderTarget(fRenderTarget);
89 }
90
91 SkCanvas* BaseExample::createCanvas() {
92 if (fType == kGPU_DeviceType) {
93 if (NULL != fContext && NULL != fRenderTarget) {
94 SkAutoTUnref<SkDevice> device(new SkGpuDevice(fContext, fRenderTarge t));
95 return new SkCanvas(device);
96 }
97 tearDownBackend();
98 setupBackend(kRaster_DeviceType);
99 }
100 return INHERITED::createCanvas();
101 }
102
103 void BaseExample::draw(SkCanvas* canvas) {
104 if (fType == kGPU_DeviceType) {
105
106 SkASSERT(NULL != fContext);
107 fContext->flush();
108 }
109 if (fType == kRaster_DeviceType) {
110 // need to send the raster bits to the (gpu) window
111 fContext->setRenderTarget(fRenderTarget);
112 const SkBitmap& bm = getBitmap();
113 fRenderTarget->writePixels(0, 0, bm.width(), bm.height(),
114 kSkia8888_GrPixelConfig,
115 bm.getPixels(),
116 bm.rowBytes());
117 }
118 INHERITED::present();
119 }
120
121 void BaseExample::onSizeChange() {
122 setupRenderTarget();
123 }
124
125 #ifdef SK_BUILD_FOR_WIN
126 void BaseExample::onHandleInval(const SkIRect& rect) {
127 RECT winRect;
128 winRect.top = rect.top();
129 winRect.bottom = rect.bottom();
130 winRect.right = rect.right();
131 winRect.left = rect.left();
132 InvalidateRect((HWND)this->getHWND(), &winRect, false);
133 }
134 #endif
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