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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/GLTestContext.h"
#import <OpenGLES/EAGL.h>
#include <dlfcn.h>
#define EAGLCTX ((EAGLContext*)(fEAGLContext))
namespace {
std::function<void()> context_restorer() {
EAGLContext* context = [EAGLContext currentContext];
return [context] { [EAGLContext setCurrentContext:context]; };
}
class IOSGLTestContext : public sk_gpu_test::GLTestContext {
public:
IOSGLTestContext(IOSGLTestContext* shareContext);
~IOSGLTestContext() override;
private:
void destroyGLContext();
void onPlatformMakeCurrent() const override;
std::function<void()> onPlatformGetAutoContextRestore() const override;
void onPlatformSwapBuffers() const override;
GrGLFuncPtr onPlatformGetProcAddress(const char*) const override;
EAGLContext* fEAGLContext;
void* fGLLibrary;
};
IOSGLTestContext::IOSGLTestContext(IOSGLTestContext* shareContext)
: fEAGLContext(NULL)
, fGLLibrary(RTLD_DEFAULT) {
if (shareContext) {
EAGLContext* iosShareContext = shareContext->fEAGLContext;
fEAGLContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2
sharegroup: [iosShareContext sharegroup]];
} else {
fEAGLContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
}
SkScopeExit restorer(context_restorer());
[EAGLContext setCurrentContext:fEAGLContext];
sk_sp<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.release());
}
IOSGLTestContext::~IOSGLTestContext() {
this->teardown();
this->destroyGLContext();
}
void IOSGLTestContext::destroyGLContext() {
if (fEAGLContext) {
if ([EAGLContext currentContext] == fEAGLContext) {
// This will ensure that the context is immediately deleted.
[EAGLContext setCurrentContext:nil];
}
fEAGLContext = nil;
}
if (nullptr != fGLLibrary) {
dlclose(fGLLibrary);
}
}
void IOSGLTestContext::onPlatformMakeCurrent() const {
if (![EAGLContext setCurrentContext:fEAGLContext]) {
SkDebugf("Could not set the context.\n");
}
}
std::function<void()> IOSGLTestContext::onPlatformGetAutoContextRestore() const {
if ([EAGLContext currentContext] == fEAGLContext) {
return nullptr;
}
return context_restorer();
}
void IOSGLTestContext::onPlatformSwapBuffers() const { }
GrGLFuncPtr IOSGLTestContext::onPlatformGetProcAddress(const char* procName) const {
void* handle = (nullptr == fGLLibrary) ? RTLD_DEFAULT : fGLLibrary;
return reinterpret_cast<GrGLFuncPtr>(dlsym(handle, procName));
}
} // anonymous namespace
namespace sk_gpu_test {
GLTestContext *CreatePlatformGLTestContext(GrGLStandard forcedGpuAPI,
GLTestContext *shareContext) {
if (kGL_GrGLStandard == forcedGpuAPI) {
return NULL;
}
IOSGLTestContext* iosShareContext = reinterpret_cast<IOSGLTestContext*>(shareContext);
IOSGLTestContext *ctx = new IOSGLTestContext(iosShareContext);
if (!ctx->isValid()) {
delete ctx;
return NULL;
}
return ctx;
}
}
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