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// Copyright 2014 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/ozone/common/egl_util.h"
#include "base/files/file_path.h"
#include "base/path_service.h"
#include "ui/gl/egl_util.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_features.h"
#include "ui/gl/gl_implementation.h"
namespace ui {
namespace {
const base::FilePath::CharType kDefaultEglSoname[] =
FILE_PATH_LITERAL("libEGL.so.1");
const base::FilePath::CharType kDefaultGlesSoname[] =
FILE_PATH_LITERAL("libGLESv2.so.2");
#if BUILDFLAG(ENABLE_SWIFTSHADER)
const base::FilePath::CharType kGLESv2SwiftShaderLibraryName[] =
FILE_PATH_LITERAL("libGLESv2.so");
const base::FilePath::CharType kEGLSwiftShaderLibraryName[] =
FILE_PATH_LITERAL("libEGL.so");
#endif
bool LoadEGLGLES2Bindings(const base::FilePath& egl_library_path,
const base::FilePath& gles_library_path) {
base::NativeLibraryLoadError error;
base::NativeLibrary gles_library =
base::LoadNativeLibrary(gles_library_path, &error);
if (!gles_library) {
LOG(ERROR) << "Failed to load GLES library: " << error.ToString();
return false;
}
base::NativeLibrary egl_library =
base::LoadNativeLibrary(base::FilePath(egl_library_path), &error);
if (!egl_library) {
LOG(ERROR) << "Failed to load EGL library: " << error.ToString();
base::UnloadNativeLibrary(gles_library);
return false;
}
gl::GLGetProcAddressProc get_proc_address =
reinterpret_cast<gl::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;
}
gl::SetGLGetProcAddressProc(get_proc_address);
gl::AddGLNativeLibrary(egl_library);
gl::AddGLNativeLibrary(gles_library);
return true;
}
} // namespace
bool LoadDefaultEGLGLES2Bindings(gl::GLImplementation implementation) {
base::FilePath glesv2_path;
base::FilePath egl_path;
if (implementation == gl::kGLImplementationSwiftShaderGL) {
#if BUILDFLAG(ENABLE_SWIFTSHADER)
base::FilePath module_path;
if (!PathService::Get(base::DIR_MODULE, &module_path))
return false;
module_path = module_path.Append(FILE_PATH_LITERAL("swiftshader/"));
glesv2_path = module_path.Append(kGLESv2SwiftShaderLibraryName);
egl_path = module_path.Append(kEGLSwiftShaderLibraryName);
#else
return false;
#endif
} else {
glesv2_path = base::FilePath(kDefaultGlesSoname);
egl_path = base::FilePath(kDefaultEglSoname);
}
return LoadEGLGLES2Bindings(egl_path, glesv2_path);
}
EGLConfig ChooseEGLConfig(EGLDisplay display, const int32_t* attributes) {
int32_t num_configs;
if (!eglChooseConfig(display, attributes, nullptr, 0, &num_configs)) {
LOG(ERROR) << "eglChooseConfig failed with error "
<< GetLastEGLErrorString();
return nullptr;
}
if (num_configs == 0) {
LOG(ERROR) << "No suitable EGL configs found.";
return nullptr;
}
EGLConfig config;
if (!eglChooseConfig(display, attributes, &config, 1, &num_configs)) {
LOG(ERROR) << "eglChooseConfig failed with error "
<< GetLastEGLErrorString();
return nullptr;
}
return config;
}
} // namespace ui
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