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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gl/SkGLContext.h"
#import <OpenGLES/EAGL.h>
#include <dlfcn.h>
#define EAGLCTX ((EAGLContext*)(fEAGLContext))
namespace {
class IOSGLContext : public SkGLContext {
public:
IOSGLContext();
~IOSGLContext() override;
private:
void destroyGLContext();
void onPlatformMakeCurrent() const override;
void onPlatformSwapBuffers() const override;
GrGLFuncPtr onPlatformGetProcAddress(const char*) const override;
void* fEAGLContext;
void* fGLLibrary;
};
IOSGLContext::IOSGLContext()
: fEAGLContext(NULL)
, fGLLibrary(RTLD_DEFAULT) {
fEAGLContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
[EAGLContext setCurrentContext:EAGLCTX];
SkAutoTUnref<const GrGLInterface> gl(GrGLCreateNativeInterface());
if (NULL == gl.get()) {
SkDebugf("Failed to create gl interface");
this->destroyGLContext();
return;
}
if (!gl->validate()) {
SkDebugf("Failed to validate gl interface");
this->destroyGLContext();
return;
}
fGLLibrary = dlopen(
"/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib",
RTLD_LAZY);
this->init(gl.detach());
}
IOSGLContext::~IOSGLContext() {
this->teardown();
this->destroyGLContext();
}
void IOSGLContext::destroyGLContext() {
if (fEAGLContext) {
if ([EAGLContext currentContext] == EAGLCTX) {
[EAGLContext setCurrentContext:nil];
}
[EAGLCTX release];
fEAGLContext = NULL;
}
if (RTLD_DEFAULT != fGLLibrary) {
dlclose(fGLLibrary);
}
}
void IOSGLContext::onPlatformMakeCurrent() const {
if (![EAGLContext setCurrentContext:EAGLCTX]) {
SkDebugf("Could not set the context.\n");
}
}
void IOSGLContext::onPlatformSwapBuffers() const { }
GrGLFuncPtr IOSGLContext::onPlatformGetProcAddress(const char* procName) const {
return reinterpret_cast<GrGLFuncPtr>(dlsym(fGLLibrary, procName));
}
} // anonymous namespace
SkGLContext* SkCreatePlatformGLContext(GrGLStandard forcedGpuAPI) {
if (kGL_GrGLStandard == forcedGpuAPI) {
return NULL;
}
IOSGLContext* ctx = SkNEW(IOSGLContext);
if (!ctx->isValid()) {
SkDELETE(ctx);
return NULL;
}
return ctx;
}
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