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// Copyright 2013 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/accelerated_widget_mac/io_surface_context.h"
#include <OpenGL/gl.h>
#include <OpenGL/OpenGL.h>
#include <vector>
#include "base/command_line.h"
#include "base/logging.h"
#include "base/trace_event/trace_event.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_switches.h"
#include "ui/gl/gpu_switching_manager.h"
namespace base::apple {
template <>
struct ScopedTypeRefTraits<CGLContextObj> {
static CGLContextObj InvalidValue() { return nullptr; }
static CGLContextObj Retain(CGLContextObj object) {
return CGLRetainContext(object);
}
static void Release(CGLContextObj object) { CGLReleaseContext(object); }
};
template <>
struct ScopedTypeRefTraits<CGLPixelFormatObj> {
static CGLPixelFormatObj InvalidValue() { return nullptr; }
static CGLPixelFormatObj Retain(CGLPixelFormatObj object) {
return CGLRetainPixelFormat(object);
}
static void Release(CGLPixelFormatObj object) {
CGLReleasePixelFormat(object);
}
};
} // namespace base::apple
namespace ui {
namespace {
// The global map from window number and window ordering to context data.
using TypeMap = std::map<IOSurfaceContext::Type, IOSurfaceContext*>;
TypeMap* GetTypeMap() {
static auto* type_map = new TypeMap();
return type_map;
}
} // namespace
// static
scoped_refptr<IOSurfaceContext>
IOSurfaceContext::Get(Type type) {
TRACE_EVENT0("browser", "IOSurfaceContext::Get");
// Return the context for this type, if it exists.
auto* type_map = GetTypeMap();
TypeMap::iterator found = type_map->find(type);
if (found != type_map->end()) {
DCHECK(!found->second->poisoned_);
return found->second;
}
base::apple::ScopedTypeRef<CGLContextObj> cgl_context;
CGLError error = kCGLNoError;
// Create the pixel format object for the context.
std::vector<CGLPixelFormatAttribute> attribs;
attribs.push_back(kCGLPFADepthSize);
attribs.push_back(static_cast<CGLPixelFormatAttribute>(0));
if (gl::GLContext::SwitchableGPUsSupported())
attribs.push_back(kCGLPFAAllowOfflineRenderers);
attribs.push_back(static_cast<CGLPixelFormatAttribute>(0));
GLint number_virtual_screens = 0;
base::apple::ScopedTypeRef<CGLPixelFormatObj> pixel_format;
error = CGLChoosePixelFormat(&attribs.front(),
pixel_format.InitializeInto(),
&number_virtual_screens);
if (error != kCGLNoError) {
LOG(ERROR) << "Failed to create pixel format object.";
return nullptr;
}
// Create all contexts in the same share group so that the textures don't
// need to be recreated when transitioning contexts.
CGLContextObj share_context = nullptr;
if (!type_map->empty())
share_context = type_map->begin()->second->cgl_context();
error = CGLCreateContext(pixel_format.get(), share_context,
cgl_context.InitializeInto());
if (error != kCGLNoError) {
LOG(ERROR) << "Failed to create context object.";
return nullptr;
}
return new IOSurfaceContext(type, cgl_context);
}
void IOSurfaceContext::PoisonContextAndSharegroup() {
if (poisoned_)
return;
auto* type_map = GetTypeMap();
for (auto& it : *type_map) {
it.second->poisoned_ = true;
}
type_map->clear();
}
IOSurfaceContext::IOSurfaceContext(
Type type,
base::apple::ScopedTypeRef<CGLContextObj> cgl_context)
: type_(type), cgl_context_(cgl_context) {
auto* type_map = GetTypeMap();
DCHECK(type_map->find(type_) == type_map->end());
type_map->insert(std::make_pair(type_, this));
ui::GpuSwitchingManager::GetInstance()->AddObserver(this);
}
IOSurfaceContext::~IOSurfaceContext() {
ui::GpuSwitchingManager::GetInstance()->RemoveObserver(this);
auto* type_map = GetTypeMap();
if (!poisoned_) {
DCHECK(type_map->find(type_) != type_map->end());
DCHECK(type_map->find(type_)->second == this);
type_map->erase(type_);
} else {
TypeMap::const_iterator found = type_map->find(type_);
if (found != type_map->end())
DCHECK(found->second != this);
}
}
void IOSurfaceContext::OnGpuSwitched(gl::GpuPreference active_gpu_heuristic) {
// Recreate all browser-side GL contexts whenever the GPU switches. If this
// is not done, performance will suffer.
// http://crbug.com/361493
PoisonContextAndSharegroup();
}
} // namespace ui
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