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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gl/init/gl_initializer.h"
#include "base/base_paths.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/native_library.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_display.h"
#include "ui/gl/gl_egl_api_implementation.h"
#include "ui/gl/gl_gl_api_implementation.h"
#include "ui/gl/gl_utils.h"
#include "ui/gl/init/gl_display_initializer.h"
#include "ui/gl/startup_trace.h"
namespace gl {
namespace init {
namespace {
bool InitializeStaticNativeEGLInternal() {
base::NativeLibrary gles_library;
{
GPU_STARTUP_TRACE_EVENT("Load gles_library");
gles_library = LoadLibraryAndPrintError("libGLESv2.so");
}
if (!gles_library)
return false;
base::NativeLibrary egl_library;
{
GPU_STARTUP_TRACE_EVENT("Load egl_library");
egl_library = LoadLibraryAndPrintError("libEGL.so");
}
if (!egl_library) {
base::UnloadNativeLibrary(gles_library);
return false;
}
GLGetProcAddressProc get_proc_address =
reinterpret_cast<GLGetProcAddressProc>(
base::GetFunctionPointerFromNativeLibrary(egl_library,
"eglGetProcAddress"));
if (!get_proc_address) {
LOG(ERROR) << "eglGetProcAddress not found.";
base::UnloadNativeLibrary(egl_library);
base::UnloadNativeLibrary(gles_library);
return false;
}
SetGLGetProcAddressProc(get_proc_address);
AddGLNativeLibrary(egl_library);
AddGLNativeLibrary(gles_library);
return true;
}
bool InitializeStaticEGLInternal(GLImplementationParts implementation) {
bool initialized = false;
#if BUILDFLAG(USE_STATIC_ANGLE)
// Use ANGLE if it is requested and it is statically linked
if (implementation.gl == kGLImplementationEGLANGLE) {
initialized = InitializeStaticANGLEEGL();
}
#endif // BUILDFLAG(USE_STATIC_ANGLE)
if (!initialized) {
initialized = InitializeStaticNativeEGLInternal();
}
if (!initialized) {
return false;
}
SetGLImplementationParts(implementation);
InitializeStaticGLBindingsGL();
InitializeStaticGLBindingsEGL();
return true;
}
} // namespace
GLDisplay* InitializeGLOneOffPlatform(gl::GpuPreference gpu_preference) {
GLDisplayEGL* display = GetDisplayEGL(gpu_preference);
switch (GetGLImplementation()) {
case kGLImplementationEGLGLES2:
case kGLImplementationEGLANGLE:
if (!InitializeDisplay(display,
EGLDisplayPlatform(EGL_DEFAULT_DISPLAY))) {
LOG(ERROR) << "GLDisplayEGL::Initialize failed.";
return nullptr;
}
break;
default:
break;
}
return display;
}
bool InitializeStaticGLBindings(GLImplementationParts implementation) {
// Prevent reinitialization with a different implementation. Once the gpu
// unit tests have initialized with kGLImplementationMock, we don't want to
// later switch to another GL implementation.
DCHECK_EQ(kGLImplementationNone, GetGLImplementation());
switch (implementation.gl) {
case kGLImplementationEGLGLES2:
case kGLImplementationEGLANGLE:
return InitializeStaticEGLInternal(implementation);
case kGLImplementationMockGL:
case kGLImplementationStubGL:
SetGLImplementationParts(implementation);
InitializeStaticGLBindingsGL();
return true;
default:
NOTREACHED();
}
}
void ShutdownGLPlatform(GLDisplay* display) {
if (display)
display->Shutdown();
ClearBindingsEGL();
ClearBindingsGL();
}
} // namespace init
} // namespace gl
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