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      1 
      2 /*
      3  * Copyright 2011 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 #include "SkTypes.h"
      9 
     10 #include "gl/GLTestContext.h"
     11 #include "AvailabilityMacros.h"
     12 
     13 #include <OpenGL/OpenGL.h>
     14 #include <dlfcn.h>
     15 
     16 namespace {
     17 class MacGLTestContext : public sk_gpu_test::GLTestContext {
     18 public:
     19     MacGLTestContext(MacGLTestContext* shareContext);
     20     ~MacGLTestContext() 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     CGLContextObj fContext;
     30     void* fGLLibrary;
     31 };
     32 
     33 MacGLTestContext::MacGLTestContext(MacGLTestContext* shareContext)
     34     : fContext(nullptr)
     35     , fGLLibrary(RTLD_DEFAULT) {
     36     CGLPixelFormatAttribute attributes[] = {
     37 #if MAC_OS_X_VERSION_10_7
     38         kCGLPFAOpenGLProfile, (CGLPixelFormatAttribute) kCGLOGLPVersion_3_2_Core,
     39 #endif
     40         kCGLPFADoubleBuffer,
     41         (CGLPixelFormatAttribute)0
     42     };
     43     CGLPixelFormatObj pixFormat;
     44     GLint npix;
     45 
     46     CGLChoosePixelFormat(attributes, &pixFormat, &npix);
     47 
     48     if (nullptr == pixFormat) {
     49         SkDebugf("CGLChoosePixelFormat failed.");
     50         return;
     51     }
     52 
     53     CGLCreateContext(pixFormat, shareContext ? shareContext->fContext : nullptr, &fContext);
     54     CGLReleasePixelFormat(pixFormat);
     55 
     56     if (nullptr == fContext) {
     57         SkDebugf("CGLCreateContext failed.");
     58         return;
     59     }
     60 
     61     CGLSetCurrentContext(fContext);
     62 
     63     sk_sp<const GrGLInterface> gl(GrGLCreateNativeInterface());
     64     if (nullptr == gl.get()) {
     65         SkDebugf("Context could not create GL interface.\n");
     66         this->destroyGLContext();
     67         return;
     68     }
     69     if (!gl->validate()) {
     70         SkDebugf("Context could not validate GL interface.\n");
     71         this->destroyGLContext();
     72         return;
     73     }
     74 
     75     fGLLibrary = dlopen(
     76         "/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib",
     77         RTLD_LAZY);
     78 
     79     this->init(gl.release());
     80 }
     81 
     82 MacGLTestContext::~MacGLTestContext() {
     83     this->teardown();
     84     this->destroyGLContext();
     85 }
     86 
     87 void MacGLTestContext::destroyGLContext() {
     88     if (fContext) {
     89         CGLReleaseContext(fContext);
     90         fContext = nullptr;
     91     }
     92     if (RTLD_DEFAULT != fGLLibrary) {
     93         dlclose(fGLLibrary);
     94     }
     95 }
     96 
     97 void MacGLTestContext::onPlatformMakeCurrent() const {
     98     CGLSetCurrentContext(fContext);
     99 }
    100 
    101 void MacGLTestContext::onPlatformSwapBuffers() const {
    102     CGLFlushDrawable(fContext);
    103 }
    104 
    105 GrGLFuncPtr MacGLTestContext::onPlatformGetProcAddress(const char* procName) const {
    106     return reinterpret_cast<GrGLFuncPtr>(dlsym(fGLLibrary, procName));
    107 }
    108 
    109 }  // anonymous namespace
    110 
    111 namespace sk_gpu_test {
    112 GLTestContext* CreatePlatformGLTestContext(GrGLStandard forcedGpuAPI,
    113                                            GLTestContext* shareContext) {
    114     if (kGLES_GrGLStandard == forcedGpuAPI) {
    115         return nullptr;
    116     }
    117     MacGLTestContext* macShareContext = reinterpret_cast<MacGLTestContext*>(shareContext);
    118     MacGLTestContext* ctx = new MacGLTestContext(macShareContext);
    119     if (!ctx->isValid()) {
    120         delete ctx;
    121         return nullptr;
    122     }
    123     return ctx;
    124 }
    125 }  // namespace sk_gpu_test
    126