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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 "gpu/command_buffer/service/renderbuffer_manager.h"
#include "base/logging.h"
#include "base/strings/stringprintf.h"
#include "base/trace_event/trace_event.h"
#include "gpu/command_buffer/common/gles2_cmd_utils.h"
#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
#include "gpu/command_buffer/service/memory_tracking.h"
#include "ui/gl/gl_implementation.h"
namespace gpu {
namespace gles2 {
// This should contain everything to uniquely identify a Renderbuffer.
static const char RenderbufferTag[] = "|Renderbuffer|";
struct RenderbufferSignature {
GLenum internal_format_;
GLsizei samples_;
GLsizei width_;
GLsizei height_;
// Since we will be hashing this signature structure, the padding must be
// zero initialized. Although the C++11 specifications specify that this is
// true, we will use a constructor with a memset to further enforce it instead
// of relying on compilers adhering to this deep dark corner specification.
RenderbufferSignature(GLenum internal_format,
GLsizei samples,
GLsizei width,
GLsizei height) {
memset(this, 0, sizeof(RenderbufferSignature));
internal_format_ = internal_format;
samples_ = samples;
width_ = width;
height_ = height;
}
};
RenderbufferManager::RenderbufferManager(
MemoryTracker* memory_tracker,
GLint max_renderbuffer_size,
GLint max_samples,
bool depth24_supported)
: memory_tracker_(
new MemoryTypeTracker(memory_tracker, MemoryTracker::kUnmanaged)),
max_renderbuffer_size_(max_renderbuffer_size),
max_samples_(max_samples),
depth24_supported_(depth24_supported),
num_uncleared_renderbuffers_(0),
renderbuffer_count_(0),
have_context_(true) {
}
RenderbufferManager::~RenderbufferManager() {
DCHECK(renderbuffers_.empty());
// If this triggers, that means something is keeping a reference to
// a Renderbuffer belonging to this.
CHECK_EQ(renderbuffer_count_, 0u);
DCHECK_EQ(0, num_uncleared_renderbuffers_);
}
size_t Renderbuffer::EstimatedSize() {
uint32 size = 0;
manager_->ComputeEstimatedRenderbufferSize(
width_, height_, samples_, internal_format_, &size);
return size;
}
size_t Renderbuffer::GetSignatureSize() const {
return sizeof(RenderbufferTag) + sizeof(RenderbufferSignature);
}
void Renderbuffer::AddToSignature(std::string* signature) const {
DCHECK(signature);
RenderbufferSignature signature_data(internal_format_,
samples_,
width_,
height_);
signature->append(RenderbufferTag, sizeof(RenderbufferTag));
signature->append(reinterpret_cast<const char*>(&signature_data),
sizeof(signature_data));
}
Renderbuffer::Renderbuffer(RenderbufferManager* manager,
GLuint client_id,
GLuint service_id)
: manager_(manager),
client_id_(client_id),
service_id_(service_id),
cleared_(true),
has_been_bound_(false),
samples_(0),
internal_format_(GL_RGBA4),
width_(0),
height_(0) {
manager_->StartTracking(this);
}
Renderbuffer::~Renderbuffer() {
if (manager_) {
if (manager_->have_context_) {
GLuint id = service_id();
glDeleteRenderbuffersEXT(1, &id);
}
manager_->StopTracking(this);
manager_ = NULL;
}
}
void RenderbufferManager::Destroy(bool have_context) {
have_context_ = have_context;
renderbuffers_.clear();
DCHECK_EQ(0u, memory_tracker_->GetMemRepresented());
}
void RenderbufferManager::StartTracking(Renderbuffer* /* renderbuffer */) {
++renderbuffer_count_;
}
void RenderbufferManager::StopTracking(Renderbuffer* renderbuffer) {
--renderbuffer_count_;
if (!renderbuffer->cleared()) {
--num_uncleared_renderbuffers_;
}
memory_tracker_->TrackMemFree(renderbuffer->EstimatedSize());
}
void RenderbufferManager::SetInfo(
Renderbuffer* renderbuffer,
GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height) {
DCHECK(renderbuffer);
if (!renderbuffer->cleared()) {
--num_uncleared_renderbuffers_;
}
memory_tracker_->TrackMemFree(renderbuffer->EstimatedSize());
renderbuffer->SetInfo(samples, internalformat, width, height);
memory_tracker_->TrackMemAlloc(renderbuffer->EstimatedSize());
if (!renderbuffer->cleared()) {
++num_uncleared_renderbuffers_;
}
}
void RenderbufferManager::SetCleared(Renderbuffer* renderbuffer,
bool cleared) {
DCHECK(renderbuffer);
if (!renderbuffer->cleared()) {
--num_uncleared_renderbuffers_;
}
renderbuffer->set_cleared(cleared);
if (!renderbuffer->cleared()) {
++num_uncleared_renderbuffers_;
}
}
void RenderbufferManager::CreateRenderbuffer(
GLuint client_id, GLuint service_id) {
scoped_refptr<Renderbuffer> renderbuffer(
new Renderbuffer(this, client_id, service_id));
std::pair<RenderbufferMap::iterator, bool> result =
renderbuffers_.insert(std::make_pair(client_id, renderbuffer));
DCHECK(result.second);
if (!renderbuffer->cleared()) {
++num_uncleared_renderbuffers_;
}
}
Renderbuffer* RenderbufferManager::GetRenderbuffer(
GLuint client_id) {
RenderbufferMap::iterator it = renderbuffers_.find(client_id);
return it != renderbuffers_.end() ? it->second.get() : NULL;
}
void RenderbufferManager::RemoveRenderbuffer(GLuint client_id) {
RenderbufferMap::iterator it = renderbuffers_.find(client_id);
if (it != renderbuffers_.end()) {
Renderbuffer* renderbuffer = it->second.get();
renderbuffer->MarkAsDeleted();
renderbuffers_.erase(it);
}
}
bool RenderbufferManager::ComputeEstimatedRenderbufferSize(int width,
int height,
int samples,
int internal_format,
uint32* size) const {
DCHECK(size);
uint32 temp = 0;
if (!SafeMultiplyUint32(width, height, &temp)) {
return false;
}
if (!SafeMultiplyUint32(temp, samples, &temp)) {
return false;
}
GLenum impl_format = InternalRenderbufferFormatToImplFormat(internal_format);
if (!SafeMultiplyUint32(
temp, GLES2Util::RenderbufferBytesPerPixel(impl_format), &temp)) {
return false;
}
*size = temp;
return true;
}
GLenum RenderbufferManager::InternalRenderbufferFormatToImplFormat(
GLenum impl_format) const {
if (gfx::GetGLImplementation() != gfx::kGLImplementationEGLGLES2) {
switch (impl_format) {
case GL_DEPTH_COMPONENT16:
return GL_DEPTH_COMPONENT;
case GL_RGBA4:
case GL_RGB5_A1:
return GL_RGBA;
case GL_RGB565:
return GL_RGB;
}
} else {
// Upgrade 16-bit depth to 24-bit if possible.
if (impl_format == GL_DEPTH_COMPONENT16 && depth24_supported_)
return GL_DEPTH_COMPONENT24;
}
return impl_format;
}
} // namespace gles2
} // namespace gpu
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