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// Copyright (c) 2013 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 "content/common/gpu/stream_texture_android.h"
#include "base/bind.h"
#include "content/common/android/surface_texture_peer.h"
#include "content/common/gpu/gpu_channel.h"
#include "content/common/gpu/gpu_messages.h"
#include "gpu/command_buffer/service/context_group.h"
#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
#include "gpu/command_buffer/service/texture_manager.h"
#include "ui/gfx/size.h"
namespace content {
using gpu::gles2::ContextGroup;
using gpu::gles2::GLES2Decoder;
using gpu::gles2::TextureManager;
using gpu::gles2::TextureRef;
// static
int32 StreamTexture::Create(
GpuCommandBufferStub* owner_stub,
uint32 client_texture_id) {
GpuChannel* channel = owner_stub->channel();
int32 route_id = channel->GenerateRouteID();
GLES2Decoder* decoder = owner_stub->decoder();
TextureManager* texture_manager =
decoder->GetContextGroup()->texture_manager();
TextureRef* texture = texture_manager->GetTexture(client_texture_id);
if (texture && (!texture->texture()->target() ||
texture->texture()->target() == GL_TEXTURE_EXTERNAL_OES)) {
// TODO: Ideally a valid image id was returned to the client so that
// it could then call glBindTexImage2D() for doing the following.
scoped_refptr<gfx::GLImage> gl_image(
new StreamTexture(owner_stub, route_id, texture->service_id()));
gfx::Size size = gl_image->GetSize();
texture_manager->SetTarget(texture, GL_TEXTURE_EXTERNAL_OES);
texture_manager->SetLevelInfo(texture,
GL_TEXTURE_EXTERNAL_OES,
0,
GL_RGBA,
size.width(),
size.height(),
1,
0,
GL_RGBA,
GL_UNSIGNED_BYTE,
true);
texture_manager->SetLevelImage(
texture, GL_TEXTURE_EXTERNAL_OES, 0, gl_image);
return route_id;
}
return 0;
}
StreamTexture::StreamTexture(GpuCommandBufferStub* owner_stub,
int32 route_id,
uint32 texture_id)
: surface_texture_(new gfx::SurfaceTexture(texture_id)),
size_(0, 0),
has_updated_(false),
owner_stub_(owner_stub),
route_id_(route_id),
has_listener_(false),
weak_factory_(this) {
owner_stub->AddDestructionObserver(this);
memset(current_matrix_, 0, sizeof(current_matrix_));
owner_stub->channel()->AddRoute(route_id, this);
}
StreamTexture::~StreamTexture() {
if (owner_stub_) {
owner_stub_->RemoveDestructionObserver(this);
owner_stub_->channel()->RemoveRoute(route_id_);
}
}
void StreamTexture::OnWillDestroyStub() {
owner_stub_->RemoveDestructionObserver(this);
owner_stub_->channel()->RemoveRoute(route_id_);
owner_stub_ = NULL;
// If the owner goes away, there is no need to keep the SurfaceTexture around.
// The GL texture will keep working regardless with the currently bound frame.
surface_texture_ = NULL;
}
void StreamTexture::Destroy() {
NOTREACHED();
}
void StreamTexture::WillUseTexImage() {
if (!owner_stub_)
return;
// TODO(sievers): Update also when used in a different context.
// Also see crbug.com/309162.
if (surface_texture_.get() &&
owner_stub_->decoder()->GetGLContext()->IsCurrent(NULL)) {
surface_texture_->UpdateTexImage();
}
if (has_listener_) {
float mtx[16];
surface_texture_->GetTransformMatrix(mtx);
// Only query the matrix once we have bound a valid frame.
if (has_updated_ && memcmp(current_matrix_, mtx, sizeof(mtx)) != 0) {
memcpy(current_matrix_, mtx, sizeof(mtx));
GpuStreamTextureMsg_MatrixChanged_Params params;
memcpy(¶ms.m00, mtx, sizeof(mtx));
owner_stub_->channel()->Send(
new GpuStreamTextureMsg_MatrixChanged(route_id_, params));
}
}
}
void StreamTexture::OnFrameAvailable() {
has_updated_ = true;
DCHECK(has_listener_);
if (owner_stub_) {
owner_stub_->channel()->Send(
new GpuStreamTextureMsg_FrameAvailable(route_id_));
}
}
gfx::Size StreamTexture::GetSize() {
return size_;
}
bool StreamTexture::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(StreamTexture, message)
IPC_MESSAGE_HANDLER(GpuStreamTextureMsg_StartListening, OnStartListening)
IPC_MESSAGE_HANDLER(GpuStreamTextureMsg_EstablishPeer, OnEstablishPeer)
IPC_MESSAGE_HANDLER(GpuStreamTextureMsg_SetSize, OnSetSize)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
DCHECK(handled);
return handled;
}
void StreamTexture::OnStartListening() {
DCHECK(!has_listener_);
has_listener_ = true;
surface_texture_->SetFrameAvailableCallback(base::Bind(
&StreamTexture::OnFrameAvailable, weak_factory_.GetWeakPtr()));
}
void StreamTexture::OnEstablishPeer(int32 primary_id, int32 secondary_id) {
if (!owner_stub_)
return;
base::ProcessHandle process = owner_stub_->channel()->renderer_pid();
SurfaceTexturePeer::GetInstance()->EstablishSurfaceTexturePeer(
process, surface_texture_, primary_id, secondary_id);
}
} // namespace content
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