1
2 /*
3 * Copyright 2015 Google Inc.
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 #include "GrBackendSurface.h"
10 #include "GrContext.h"
11 #include "GLWindowContext.h"
12
13 #include "gl/GrGLDefines.h"
14 #include "gl/GrGLUtil.h"
15
16 #include "SkCanvas.h"
17 #include "SkImage_Base.h"
18 #include "SkMathPriv.h"
19 #include "SkSurface.h"
20
21 namespace sk_app {
22
GLWindowContext(const DisplayParams & params)23 GLWindowContext::GLWindowContext(const DisplayParams& params)
24 : WindowContext(params)
25 , fBackendContext(nullptr)
26 , fSurface(nullptr) {
27 fDisplayParams.fMSAASampleCount = fDisplayParams.fMSAASampleCount ?
28 GrNextPow2(fDisplayParams.fMSAASampleCount) :
29 0;
30 }
31
initializeContext()32 void GLWindowContext::initializeContext() {
33 this->onInitializeContext();
34 SkASSERT(nullptr == fContext);
35
36 fBackendContext.reset(GrGLCreateNativeInterface());
37 fContext = GrContext::Create(kOpenGL_GrBackend, (GrBackendContext)fBackendContext.get(),
38 fDisplayParams.fGrContextOptions);
39 if (!fContext && fDisplayParams.fMSAASampleCount) {
40 fDisplayParams.fMSAASampleCount /= 2;
41 this->initializeContext();
42 return;
43 }
44
45 if (fContext) {
46 // We may not have real sRGB support (ANGLE, in particular), so check for
47 // that, and fall back to L32:
48 fPixelConfig = fContext->caps()->srgbSupport() && fDisplayParams.fColorSpace
49 ? kSRGBA_8888_GrPixelConfig : kRGBA_8888_GrPixelConfig;
50 } else {
51 fPixelConfig = kUnknown_GrPixelConfig;
52 }
53 }
54
destroyContext()55 void GLWindowContext::destroyContext() {
56 fSurface.reset(nullptr);
57
58 if (fContext) {
59 // in case we have outstanding refs to this guy (lua?)
60 fContext->abandonContext();
61 fContext->unref();
62 fContext = nullptr;
63 }
64
65 fBackendContext.reset(nullptr);
66
67 this->onDestroyContext();
68 }
69
getBackbufferSurface()70 sk_sp<SkSurface> GLWindowContext::getBackbufferSurface() {
71 if (nullptr == fSurface) {
72 if (fContext) {
73 GrGLFramebufferInfo fbInfo;
74 GrGLint buffer;
75 GR_GL_CALL(fBackendContext.get(), GetIntegerv(GR_GL_FRAMEBUFFER_BINDING,
76 &buffer));
77 fbInfo.fFBOID = buffer;
78
79 GrBackendRenderTarget backendRT(fWidth,
80 fHeight,
81 fSampleCount,
82 fStencilBits,
83 fPixelConfig,
84 fbInfo);
85
86 fSurface = SkSurface::MakeFromBackendRenderTarget(fContext, backendRT,
87 kBottomLeft_GrSurfaceOrigin,
88 fDisplayParams.fColorSpace,
89 &fSurfaceProps);
90 }
91 }
92
93 return fSurface;
94 }
95
swapBuffers()96 void GLWindowContext::swapBuffers() {
97 this->onSwapBuffers();
98 }
99
resize(int w,int h)100 void GLWindowContext::resize(int w, int h) {
101 this->destroyContext();
102 this->initializeContext();
103 }
104
setDisplayParams(const DisplayParams & params)105 void GLWindowContext::setDisplayParams(const DisplayParams& params) {
106 this->destroyContext();
107 fDisplayParams = params;
108 this->initializeContext();
109 }
110
111 } //namespace sk_app
112