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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 "gpu/command_buffer/service/mailbox_synchronizer.h"
#include "base/bind.h"
#include "gpu/command_buffer/service/mailbox_manager.h"
#include "gpu/command_buffer/service/texture_manager.h"
#include "ui/gl/gl_implementation.h"
namespace gpu {
namespace gles2 {
namespace {
MailboxSynchronizer* g_instance = NULL;
} // anonymous namespace
// static
bool MailboxSynchronizer::Initialize() {
DCHECK(!g_instance);
DCHECK(gfx::GetGLImplementation() != gfx::kGLImplementationNone)
<< "GL bindings not initialized";
switch (gfx::GetGLImplementation()) {
case gfx::kGLImplementationMockGL:
break;
case gfx::kGLImplementationEGLGLES2:
#if !defined(OS_MACOSX)
{
if (!gfx::g_driver_egl.ext.b_EGL_KHR_image_base ||
!gfx::g_driver_egl.ext.b_EGL_KHR_gl_texture_2D_image ||
!gfx::g_driver_gl.ext.b_GL_OES_EGL_image ||
!gfx::g_driver_egl.ext.b_EGL_KHR_fence_sync) {
LOG(WARNING) << "MailboxSync not supported due to missing EGL "
"image/fence support";
return false;
}
}
break;
#endif
default:
NOTREACHED();
return false;
}
g_instance = new MailboxSynchronizer;
return true;
}
// static
void MailboxSynchronizer::Terminate() {
DCHECK(g_instance);
delete g_instance;
g_instance = NULL;
}
// static
MailboxSynchronizer* MailboxSynchronizer::GetInstance() {
return g_instance;
}
MailboxSynchronizer::TargetName::TargetName(unsigned target,
const Mailbox& mailbox)
: target(target), mailbox(mailbox) {}
MailboxSynchronizer::TextureGroup::TextureGroup(
const TextureDefinition& definition)
: definition(definition) {}
MailboxSynchronizer::TextureGroup::~TextureGroup() {}
MailboxSynchronizer::TextureVersion::TextureVersion(
linked_ptr<TextureGroup> group)
: version(group->definition.version()), group(group) {}
MailboxSynchronizer::TextureVersion::~TextureVersion() {}
MailboxSynchronizer::MailboxSynchronizer() {}
MailboxSynchronizer::~MailboxSynchronizer() {
DCHECK_EQ(0U, textures_.size());
}
void MailboxSynchronizer::ReassociateMailboxLocked(
const TargetName& target_name,
TextureGroup* group) {
lock_.AssertAcquired();
for (TextureMap::iterator it = textures_.begin(); it != textures_.end();
it++) {
std::set<TargetName>::iterator mb_it =
it->second.group->mailboxes.find(target_name);
if (it->second.group != group &&
mb_it != it->second.group->mailboxes.end()) {
it->second.group->mailboxes.erase(mb_it);
}
}
group->mailboxes.insert(target_name);
}
linked_ptr<MailboxSynchronizer::TextureGroup>
MailboxSynchronizer::GetGroupForMailboxLocked(const TargetName& target_name) {
lock_.AssertAcquired();
for (TextureMap::iterator it = textures_.begin(); it != textures_.end();
it++) {
std::set<TargetName>::const_iterator mb_it =
it->second.group->mailboxes.find(target_name);
if (mb_it != it->second.group->mailboxes.end())
return it->second.group;
}
return make_linked_ptr<MailboxSynchronizer::TextureGroup>(NULL);
}
Texture* MailboxSynchronizer::CreateTextureFromMailbox(unsigned target,
const Mailbox& mailbox) {
base::AutoLock lock(lock_);
TargetName target_name(target, mailbox);
linked_ptr<TextureGroup> group = GetGroupForMailboxLocked(target_name);
if (group.get()) {
Texture* new_texture = group->definition.CreateTexture();
if (new_texture)
textures_.insert(std::make_pair(new_texture, TextureVersion(group)));
return new_texture;
}
return NULL;
}
void MailboxSynchronizer::TextureDeleted(Texture* texture) {
base::AutoLock lock(lock_);
TextureMap::iterator it = textures_.find(texture);
if (it != textures_.end()) {
// TODO: We could avoid the update if this was the last ref.
UpdateTextureLocked(it->first, it->second);
textures_.erase(it);
}
}
void MailboxSynchronizer::PushTextureUpdates(MailboxManager* manager) {
base::AutoLock lock(lock_);
for (MailboxManager::MailboxToTextureMap::const_iterator texture_it =
manager->mailbox_to_textures_.begin();
texture_it != manager->mailbox_to_textures_.end();
texture_it++) {
TargetName target_name(texture_it->first.target, texture_it->first.mailbox);
Texture* texture = texture_it->second->first;
// TODO(sievers): crbug.com/352274
// Should probably only fail if it already *has* mipmaps, while allowing
// incomplete textures here. Also reconsider how to fail otherwise.
bool needs_mips = texture->min_filter() != GL_NEAREST &&
texture->min_filter() != GL_LINEAR;
if (target_name.target != GL_TEXTURE_2D || needs_mips)
continue;
TextureMap::iterator it = textures_.find(texture);
if (it != textures_.end()) {
TextureVersion& texture_version = it->second;
TextureGroup* group = texture_version.group.get();
std::set<TargetName>::const_iterator mb_it =
group->mailboxes.find(target_name);
if (mb_it == group->mailboxes.end()) {
// We previously did not associate this texture with the given mailbox.
// Unlink other texture groups from the mailbox.
ReassociateMailboxLocked(target_name, group);
}
UpdateTextureLocked(texture, texture_version);
} else {
linked_ptr<TextureGroup> group = make_linked_ptr(new TextureGroup(
TextureDefinition(target_name.target, texture, 1, NULL)));
// Unlink other textures from this mailbox in case the name is not new.
ReassociateMailboxLocked(target_name, group.get());
textures_.insert(std::make_pair(texture, TextureVersion(group)));
}
}
}
void MailboxSynchronizer::UpdateTextureLocked(Texture* texture,
TextureVersion& texture_version) {
lock_.AssertAcquired();
gfx::GLImage* gl_image = texture->GetLevelImage(texture->target(), 0);
TextureGroup* group = texture_version.group.get();
scoped_refptr<NativeImageBuffer> image_buffer = group->definition.image();
// Make sure we don't clobber with an older version
if (!group->definition.IsOlderThan(texture_version.version))
return;
// Also don't push redundant updates. Note that it would break the
// versioning.
if (group->definition.Matches(texture))
return;
if (gl_image && !image_buffer->IsClient(gl_image)) {
LOG(ERROR) << "MailboxSync: Incompatible attachment";
return;
}
group->definition = TextureDefinition(texture->target(),
texture,
++texture_version.version,
gl_image ? image_buffer : NULL);
}
void MailboxSynchronizer::PullTextureUpdates(MailboxManager* manager) {
base::AutoLock lock(lock_);
for (MailboxManager::MailboxToTextureMap::const_iterator texture_it =
manager->mailbox_to_textures_.begin();
texture_it != manager->mailbox_to_textures_.end();
texture_it++) {
Texture* texture = texture_it->second->first;
TextureMap::iterator it = textures_.find(texture);
if (it != textures_.end()) {
TextureDefinition& definition = it->second.group->definition;
if (it->second.version == definition.version() ||
definition.IsOlderThan(it->second.version))
continue;
it->second.version = definition.version();
definition.UpdateTexture(texture);
}
}
}
} // namespace gles2
} // namespace gpu
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