1 2 /* 3 * Copyright 2012 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 "gl/SkGLContext.h" 10 #import <OpenGLES/EAGL.h> 11 #include <dlfcn.h> 12 13 #define EAGLCTX ((EAGLContext*)(fEAGLContext)) 14 15 namespace { 16 17 class IOSGLContext : public SkGLContext { 18 public: 19 IOSGLContext(); 20 ~IOSGLContext() override; 21 22 private: 23 void destroyGLContext(); 24 25 void onPlatformMakeCurrent() const override; 26 void onPlatformSwapBuffers() const override; 27 GrGLFuncPtr onPlatformGetProcAddress(const char*) const override; 28 29 void* fEAGLContext; 30 void* fGLLibrary; 31 }; 32 33 IOSGLContext::IOSGLContext() 34 : fEAGLContext(NULL) 35 , fGLLibrary(RTLD_DEFAULT) { 36 37 fEAGLContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2]; 38 [EAGLContext setCurrentContext:EAGLCTX]; 39 40 SkAutoTUnref<const GrGLInterface> gl(GrGLCreateNativeInterface()); 41 if (NULL == gl.get()) { 42 SkDebugf("Failed to create gl interface"); 43 this->destroyGLContext(); 44 return; 45 } 46 if (!gl->validate()) { 47 SkDebugf("Failed to validate gl interface"); 48 this->destroyGLContext(); 49 return; 50 } 51 52 fGLLibrary = dlopen( 53 "/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib", 54 RTLD_LAZY); 55 56 this->init(gl.detach()); 57 } 58 59 IOSGLContext::~IOSGLContext() { 60 this->teardown(); 61 this->destroyGLContext(); 62 } 63 64 void IOSGLContext::destroyGLContext() { 65 if (fEAGLContext) { 66 if ([EAGLContext currentContext] == EAGLCTX) { 67 [EAGLContext setCurrentContext:nil]; 68 } 69 [EAGLCTX release]; 70 fEAGLContext = NULL; 71 } 72 if (RTLD_DEFAULT != fGLLibrary) { 73 dlclose(fGLLibrary); 74 } 75 } 76 77 78 void IOSGLContext::onPlatformMakeCurrent() const { 79 if (![EAGLContext setCurrentContext:EAGLCTX]) { 80 SkDebugf("Could not set the context.\n"); 81 } 82 } 83 84 void IOSGLContext::onPlatformSwapBuffers() const { } 85 86 GrGLFuncPtr IOSGLContext::onPlatformGetProcAddress(const char* procName) const { 87 return reinterpret_cast<GrGLFuncPtr>(dlsym(fGLLibrary, procName)); 88 } 89 90 } // anonymous namespace 91 92 SkGLContext* SkCreatePlatformGLContext(GrGLStandard forcedGpuAPI, SkGLContext* shareContext) { 93 SkASSERT(!shareContext); 94 if (shareContext) { 95 return NULL; 96 } 97 if (kGL_GrGLStandard == forcedGpuAPI) { 98 return NULL; 99 } 100 IOSGLContext* ctx = new IOSGLContext; 101 if (!ctx->isValid()) { 102 delete ctx; 103 return NULL; 104 } 105 return ctx; 106 } 107
