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      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/GLTestContext.h"
     10 #import <OpenGLES/EAGL.h>
     11 #include <dlfcn.h>
     12 
     13 #define EAGLCTX ((EAGLContext*)(fEAGLContext))
     14 
     15 namespace {
     16 
     17 class IOSGLTestContext : public sk_gpu_test::GLTestContext {
     18 public:
     19     IOSGLTestContext(IOSGLTestContext* shareContext);
     20     ~IOSGLTestContext() 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     EAGLContext* fEAGLContext;
     30     void* fGLLibrary;
     31 };
     32 
     33 IOSGLTestContext::IOSGLTestContext(IOSGLTestContext* shareContext)
     34     : fEAGLContext(NULL)
     35     , fGLLibrary(RTLD_DEFAULT) {
     36 
     37     if (shareContext) {
     38         EAGLContext* iosShareContext = shareContext->fEAGLContext;
     39         fEAGLContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2
     40                                             sharegroup: [iosShareContext sharegroup]];
     41     } else {
     42         fEAGLContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
     43     }
     44     [EAGLContext setCurrentContext:fEAGLContext];
     45 
     46     sk_sp<const GrGLInterface> gl(GrGLCreateNativeInterface());
     47     if (NULL == gl.get()) {
     48         SkDebugf("Failed to create gl interface");
     49         this->destroyGLContext();
     50         return;
     51     }
     52     if (!gl->validate()) {
     53         SkDebugf("Failed to validate gl interface");
     54         this->destroyGLContext();
     55         return;
     56     }
     57 
     58     fGLLibrary = dlopen(
     59         "/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib",
     60         RTLD_LAZY);
     61 
     62     this->init(gl.release());
     63 }
     64 
     65 IOSGLTestContext::~IOSGLTestContext() {
     66     this->teardown();
     67     this->destroyGLContext();
     68 }
     69 
     70 void IOSGLTestContext::destroyGLContext() {
     71     if (fEAGLContext) {
     72         if ([EAGLContext currentContext] == fEAGLContext) {
     73             [EAGLContext setCurrentContext:nil];
     74         }
     75         fEAGLContext = nil;
     76     }
     77     if (RTLD_DEFAULT != fGLLibrary) {
     78         dlclose(fGLLibrary);
     79     }
     80 }
     81 
     82 
     83 void IOSGLTestContext::onPlatformMakeCurrent() const {
     84     if (![EAGLContext setCurrentContext:fEAGLContext]) {
     85         SkDebugf("Could not set the context.\n");
     86     }
     87 }
     88 
     89 void IOSGLTestContext::onPlatformSwapBuffers() const { }
     90 
     91 GrGLFuncPtr IOSGLTestContext::onPlatformGetProcAddress(const char* procName) const {
     92     return reinterpret_cast<GrGLFuncPtr>(dlsym(fGLLibrary, procName));
     93 }
     94 
     95 }  // anonymous namespace
     96 
     97 namespace sk_gpu_test {
     98 GLTestContext *CreatePlatformGLTestContext(GrGLStandard forcedGpuAPI,
     99                                            GLTestContext *shareContext) {
    100     if (kGL_GrGLStandard == forcedGpuAPI) {
    101         return NULL;
    102     }
    103     IOSGLTestContext* iosShareContext = reinterpret_cast<IOSGLTestContext*>(shareContext);
    104     IOSGLTestContext *ctx = new IOSGLTestContext(iosShareContext);
    105     if (!ctx->isValid()) {
    106         delete ctx;
    107         return NULL;
    108     }
    109     return ctx;
    110 }
    111 }
    112