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// Copyright 2011 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 "cc/layers/texture_layer_impl.h"
#include "base/stringprintf.h"
#include "cc/layers/quad_sink.h"
#include "cc/output/renderer.h"
#include "cc/quads/texture_draw_quad.h"
#include "cc/trees/layer_tree_impl.h"
namespace cc {
TextureLayerImpl::TextureLayerImpl(LayerTreeImpl* tree_impl,
int id,
bool uses_mailbox)
: LayerImpl(tree_impl, id),
texture_id_(0),
external_texture_resource_(0),
premultiplied_alpha_(true),
flipped_(true),
uv_top_left_(0.f, 0.f),
uv_bottom_right_(1.f, 1.f),
uses_mailbox_(uses_mailbox),
own_mailbox_(false) {
vertex_opacity_[0] = 1.0f;
vertex_opacity_[1] = 1.0f;
vertex_opacity_[2] = 1.0f;
vertex_opacity_[3] = 1.0f;
}
TextureLayerImpl::~TextureLayerImpl() { FreeTextureMailbox(); }
void TextureLayerImpl::SetTextureMailbox(const TextureMailbox& mailbox) {
DCHECK(uses_mailbox_);
DCHECK(mailbox.IsEmpty() || !mailbox.Equals(texture_mailbox_));
FreeTextureMailbox();
texture_mailbox_ = mailbox;
own_mailbox_ = true;
}
scoped_ptr<LayerImpl> TextureLayerImpl::CreateLayerImpl(
LayerTreeImpl* tree_impl) {
return TextureLayerImpl::Create(tree_impl, id(), uses_mailbox_).
PassAs<LayerImpl>();
}
void TextureLayerImpl::PushPropertiesTo(LayerImpl* layer) {
LayerImpl::PushPropertiesTo(layer);
TextureLayerImpl* texture_layer = static_cast<TextureLayerImpl*>(layer);
texture_layer->set_flipped(flipped_);
texture_layer->set_uv_top_left(uv_top_left_);
texture_layer->set_uv_bottom_right(uv_bottom_right_);
texture_layer->set_vertex_opacity(vertex_opacity_);
texture_layer->set_premultiplied_alpha(premultiplied_alpha_);
if (uses_mailbox_ && own_mailbox_) {
texture_layer->SetTextureMailbox(texture_mailbox_);
own_mailbox_ = false;
} else {
texture_layer->set_texture_id(texture_id_);
}
}
bool TextureLayerImpl::WillDraw(DrawMode draw_mode,
ResourceProvider* resource_provider) {
if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
return false;
if (!uses_mailbox_ && texture_id_) {
DCHECK(!external_texture_resource_);
external_texture_resource_ =
resource_provider->CreateResourceFromExternalTexture(
GL_TEXTURE_2D,
texture_id_);
}
return external_texture_resource_ &&
LayerImpl::WillDraw(draw_mode, resource_provider);
}
void TextureLayerImpl::AppendQuads(QuadSink* quad_sink,
AppendQuadsData* append_quads_data) {
DCHECK(external_texture_resource_);
SharedQuadState* shared_quad_state =
quad_sink->UseSharedQuadState(CreateSharedQuadState());
AppendDebugBorderQuad(quad_sink, shared_quad_state, append_quads_data);
gfx::Rect quad_rect(content_bounds());
gfx::Rect opaque_rect(contents_opaque() ? quad_rect : gfx::Rect());
scoped_ptr<TextureDrawQuad> quad = TextureDrawQuad::Create();
quad->SetNew(shared_quad_state,
quad_rect,
opaque_rect,
external_texture_resource_,
premultiplied_alpha_,
uv_top_left_,
uv_bottom_right_,
vertex_opacity_,
flipped_);
// Perform explicit clipping on a quad to avoid setting a scissor later.
if (shared_quad_state->is_clipped && quad->PerformClipping())
shared_quad_state->is_clipped = false;
if (!quad->rect.IsEmpty())
quad_sink->Append(quad.PassAs<DrawQuad>(), append_quads_data);
}
void TextureLayerImpl::DidDraw(ResourceProvider* resource_provider) {
LayerImpl::DidDraw(resource_provider);
if (uses_mailbox_ || !external_texture_resource_)
return;
// FIXME: the following assert will not be true when sending resources to a
// parent compositor. A synchronization scheme (double-buffering or
// pipelining of updates) for the client will need to exist to solve this.
DCHECK(!resource_provider->InUseByConsumer(external_texture_resource_));
resource_provider->DeleteResource(external_texture_resource_);
external_texture_resource_ = 0;
}
void TextureLayerImpl::DumpLayerProperties(std::string* str, int indent) const {
str->append(IndentString(indent));
base::StringAppendF(str,
"texture layer texture id: %u premultiplied: %d\n",
texture_id_,
premultiplied_alpha_);
LayerImpl::DumpLayerProperties(str, indent);
}
void TextureLayerImpl::DidLoseOutputSurface() {
texture_id_ = 0;
external_texture_resource_ = 0;
}
const char* TextureLayerImpl::LayerTypeAsString() const {
return "cc::TextureLayerImpl";
}
bool TextureLayerImpl::CanClipSelf() const {
return true;
}
void TextureLayerImpl::DidBecomeActive() {
if (!own_mailbox_)
return;
DCHECK(!external_texture_resource_);
ResourceProvider* resource_provider = layer_tree_impl()->resource_provider();
if (!texture_mailbox_.IsEmpty()) {
external_texture_resource_ =
resource_provider->CreateResourceFromTextureMailbox(texture_mailbox_);
}
own_mailbox_ = false;
}
void TextureLayerImpl::FreeTextureMailbox() {
if (!uses_mailbox_)
return;
if (own_mailbox_) {
DCHECK(!external_texture_resource_);
texture_mailbox_.RunReleaseCallback(texture_mailbox_.sync_point(), false);
} else if (external_texture_resource_) {
DCHECK(!own_mailbox_);
ResourceProvider* resource_provider =
layer_tree_impl()->resource_provider();
resource_provider->DeleteResource(external_texture_resource_);
external_texture_resource_ = 0;
}
}
} // namespace cc
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