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// Copyright 2016 The Chromium Authors. All rights reserved.
// 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/command_line.h"
#include "base/logging.h"
#include "base/path_service.h"
#include "base/threading/thread_restrictions.h"
#include "build/build_config.h"
#include "ui/gfx/switches.h"
#include "ui/gfx/x/x11_types.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_egl_api_implementation.h"
#include "ui/gl/gl_features.h"
#include "ui/gl/gl_gl_api_implementation.h"
#include "ui/gl/gl_glx_api_implementation.h"
#include "ui/gl/gl_implementation_osmesa.h"
#include "ui/gl/gl_osmesa_api_implementation.h"
#include "ui/gl/gl_surface_egl.h"
#include "ui/gl/gl_surface_glx.h"
#include "ui/gl/gl_surface_osmesa_x11.h"
#include "ui/gl/gl_switches.h"
namespace gl {
namespace init {
namespace {
#if defined(OS_OPENBSD)
const char kGLLibraryName[] = "libGL.so";
#else
const char kGLLibraryName[] = "libGL.so.1";
#endif
const char kGLESv2LibraryName[] = "libGLESv2.so.2";
const char kEGLLibraryName[] = "libEGL.so.1";
const char kGLESv2ANGLELibraryName[] = "libGLESv2.so";
const char kEGLANGLELibraryName[] = "libEGL.so";
#if BUILDFLAG(ENABLE_SWIFTSHADER)
const char kGLESv2SwiftShaderLibraryName[] = "libGLESv2.so";
const char kEGLSwiftShaderLibraryName[] = "libEGL.so";
#endif
bool InitializeStaticGLXInternal() {
base::NativeLibrary library = NULL;
const base::CommandLine* command_line =
base::CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kTestGLLib))
library = LoadLibraryAndPrintError(
command_line->GetSwitchValueASCII(switches::kTestGLLib).c_str());
if (!library) {
library = LoadLibraryAndPrintError(kGLLibraryName);
}
if (!library)
return false;
GLGetProcAddressProc get_proc_address =
reinterpret_cast<GLGetProcAddressProc>(
base::GetFunctionPointerFromNativeLibrary(library,
"glXGetProcAddress"));
if (!get_proc_address) {
LOG(ERROR) << "glxGetProcAddress not found.";
base::UnloadNativeLibrary(library);
return false;
}
SetGLGetProcAddressProc(get_proc_address);
AddGLNativeLibrary(library);
SetGLImplementation(kGLImplementationDesktopGL);
InitializeStaticGLBindingsGL();
InitializeStaticGLBindingsGLX();
return true;
}
bool InitializeStaticEGLInternal(GLImplementation implementation) {
base::FilePath glesv2_path(kGLESv2LibraryName);
base::FilePath egl_path(kEGLLibraryName);
const base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
if (implementation == kGLImplementationSwiftShaderGL) {
#if BUILDFLAG(ENABLE_SWIFTSHADER)
base::FilePath module_path;
if (!PathService::Get(base::DIR_MODULE, &module_path))
return false;
module_path = module_path.Append("swiftshader/");
glesv2_path = module_path.Append(kGLESv2SwiftShaderLibraryName);
egl_path = module_path.Append(kEGLSwiftShaderLibraryName);
#else
return false;
#endif
} else if (cmd->GetSwitchValueASCII(switches::kUseGL) ==
kGLImplementationANGLEName) {
base::FilePath module_path;
if (!PathService::Get(base::DIR_MODULE, &module_path))
return false;
glesv2_path = module_path.Append(kGLESv2ANGLELibraryName);
egl_path = module_path.Append(kEGLANGLELibraryName);
}
base::NativeLibrary gles_library = LoadLibraryAndPrintError(glesv2_path);
if (!gles_library)
return false;
base::NativeLibrary egl_library = LoadLibraryAndPrintError(egl_path);
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);
SetGLImplementation(kGLImplementationEGLGLES2);
InitializeStaticGLBindingsGL();
InitializeStaticGLBindingsEGL();
return true;
}
} // namespace
bool InitializeGLOneOffPlatform() {
const base::CommandLine* command_line =
base::CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kHeadless) &&
command_line->GetSwitchValueASCII(switches::kUseGL) ==
kGLImplementationOSMesaName)
return true;
switch (GetGLImplementation()) {
case kGLImplementationDesktopGL:
if (!GLSurfaceGLX::InitializeOneOff()) {
LOG(ERROR) << "GLSurfaceGLX::InitializeOneOff failed.";
return false;
}
return true;
case kGLImplementationOSMesaGL:
if (!GLSurfaceOSMesaX11::InitializeOneOff()) {
LOG(ERROR) << "GLSurfaceOSMesaX11::InitializeOneOff failed.";
return false;
}
return true;
case kGLImplementationSwiftShaderGL:
case kGLImplementationEGLGLES2:
if (!GLSurfaceEGL::InitializeOneOff(gfx::GetXDisplay())) {
LOG(ERROR) << "GLSurfaceEGL::InitializeOneOff failed.";
return false;
}
return true;
default:
return true;
}
}
bool InitializeStaticGLBindings(GLImplementation 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());
// Allow the main thread or another to initialize these bindings
// after instituting restrictions on I/O. Going forward they will
// likely be used in the browser process on most platforms. The
// one-time initialization cost is small, between 2 and 5 ms.
base::ThreadRestrictions::ScopedAllowIO allow_io;
switch (implementation) {
case kGLImplementationOSMesaGL:
return InitializeStaticGLBindingsOSMesaGL();
case kGLImplementationDesktopGL:
return InitializeStaticGLXInternal();
case kGLImplementationSwiftShaderGL:
case kGLImplementationEGLGLES2:
return InitializeStaticEGLInternal(implementation);
case kGLImplementationMockGL:
case kGLImplementationStubGL:
SetGLImplementation(implementation);
InitializeStaticGLBindingsGL();
return true;
default:
NOTREACHED();
}
return false;
}
void InitializeDebugGLBindings() {
InitializeDebugGLBindingsEGL();
InitializeDebugGLBindingsGL();
InitializeDebugGLBindingsGLX();
InitializeDebugGLBindingsOSMESA();
}
void ShutdownGLPlatform() {
GLSurfaceEGL::ShutdownOneOff();
ClearBindingsEGL();
ClearBindingsGL();
ClearBindingsGLX();
ClearBindingsOSMESA();
}
} // namespace init
} // namespace gl
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