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// Copyright (c) 2012 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/gl_egl_api_implementation.h"
#include "base/command_line.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_implementation.h"
namespace gl {
namespace {
void GL_BINDING_CALL MarshalClearDepthToClearDepthf(GLclampd depth) {
glClearDepthf(static_cast<GLclampf>(depth));
}
void GL_BINDING_CALL MarshalDepthRangeToDepthRangef(GLclampd z_near,
GLclampd z_far) {
glDepthRangef(static_cast<GLclampf>(z_near), static_cast<GLclampf>(z_far));
}
} // namespace
RealEGLApi* g_real_egl;
void InitializeStaticGLBindingsEGL() {
g_driver_egl.InitializeStaticBindings();
if (!g_real_egl) {
g_real_egl = new RealEGLApi();
}
g_real_egl->Initialize(&g_driver_egl);
g_current_egl_context = g_real_egl;
// These two functions take single precision float rather than double
// precision float parameters in GLES.
::gl::g_driver_gl.fn.glClearDepthFn = MarshalClearDepthToClearDepthf;
::gl::g_driver_gl.fn.glDepthRangeFn = MarshalDepthRangeToDepthRangef;
}
void InitializeDebugGLBindingsEGL() {
g_driver_egl.InitializeDebugBindings();
}
void ClearBindingsEGL() {
if (g_real_egl) {
delete g_real_egl;
g_real_egl = NULL;
}
g_current_egl_context = NULL;
g_driver_egl.ClearBindings();
}
EGLApi::EGLApi() {
}
EGLApi::~EGLApi() {
}
EGLApiBase::EGLApiBase()
: driver_(NULL) {
}
EGLApiBase::~EGLApiBase() {
}
void EGLApiBase::InitializeBase(DriverEGL* driver) {
driver_ = driver;
}
RealEGLApi::RealEGLApi() {
}
RealEGLApi::~RealEGLApi() {
}
void RealEGLApi::Initialize(DriverEGL* driver) {
InitializeWithCommandLine(driver, base::CommandLine::ForCurrentProcess());
}
void RealEGLApi::InitializeWithCommandLine(DriverEGL* driver,
base::CommandLine* command_line) {
DCHECK(command_line);
InitializeBase(driver);
const std::string disabled_extensions = command_line->GetSwitchValueASCII(
switches::kDisableGLExtensions);
disabled_exts_.clear();
filtered_exts_.clear();
if (!disabled_extensions.empty()) {
disabled_exts_ = base::SplitString(
disabled_extensions, ", ;",
base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
}
}
const char* RealEGLApi::eglQueryStringFn(EGLDisplay dpy, EGLint name) {
if (name == EGL_EXTENSIONS) {
auto it = filtered_exts_.find(dpy);
if (it == filtered_exts_.end()) {
it = filtered_exts_.insert(std::make_pair(
dpy, FilterGLExtensionList(EGLApiBase::eglQueryStringFn(dpy, name),
disabled_exts_))).first;
}
return (*it).second.c_str();
}
return EGLApiBase::eglQueryStringFn(dpy, name);
}
TraceEGLApi::~TraceEGLApi() {
}
bool GetGLWindowSystemBindingInfoEGL(GLWindowSystemBindingInfo* info) {
EGLDisplay display = eglGetCurrentDisplay();
const char* vendor = eglQueryString(display, EGL_VENDOR);
const char* version = eglQueryString(display, EGL_VERSION);
const char* extensions = eglQueryString(display, EGL_EXTENSIONS);
*info = GLWindowSystemBindingInfo();
if (vendor)
info->vendor = vendor;
if (version)
info->version = version;
if (extensions)
info->extensions = extensions;
return true;
}
} // namespace gl
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