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// Copyright 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 "cc/layers/io_surface_layer_impl.h"
#include "base/strings/stringprintf.h"
#include "cc/layers/quad_sink.h"
#include "cc/output/gl_renderer.h" // For the GLC() macro.
#include "cc/output/output_surface.h"
#include "cc/quads/io_surface_draw_quad.h"
#include "cc/trees/layer_tree_impl.h"
#include "gpu/GLES2/gl2extchromium.h"
#include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
#include "third_party/khronos/GLES2/gl2.h"
#include "third_party/khronos/GLES2/gl2ext.h"
namespace cc {
IOSurfaceLayerImpl::IOSurfaceLayerImpl(LayerTreeImpl* tree_impl, int id)
: LayerImpl(tree_impl, id),
io_surface_id_(0),
io_surface_changed_(false),
io_surface_texture_id_(0) {}
IOSurfaceLayerImpl::~IOSurfaceLayerImpl() {
if (!io_surface_texture_id_)
return;
DestroyTexture();
}
void IOSurfaceLayerImpl::DestroyTexture() {
if (io_surface_resource_id_) {
ResourceProvider* resource_provider =
layer_tree_impl()->resource_provider();
resource_provider->DeleteResource(io_surface_resource_id_);
io_surface_resource_id_ = 0;
}
if (io_surface_texture_id_) {
OutputSurface* output_surface = layer_tree_impl()->output_surface();
// TODO(skaslev): Implement this path for software compositing.
WebKit::WebGraphicsContext3D* context3d = output_surface->context3d();
if (context3d)
context3d->deleteTexture(io_surface_texture_id_);
io_surface_texture_id_ = 0;
}
}
scoped_ptr<LayerImpl> IOSurfaceLayerImpl::CreateLayerImpl(
LayerTreeImpl* tree_impl) {
return IOSurfaceLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
}
void IOSurfaceLayerImpl::PushPropertiesTo(LayerImpl* layer) {
LayerImpl::PushPropertiesTo(layer);
IOSurfaceLayerImpl* io_surface_layer =
static_cast<IOSurfaceLayerImpl*>(layer);
io_surface_layer->SetIOSurfaceProperties(io_surface_id_, io_surface_size_);
}
bool IOSurfaceLayerImpl::WillDraw(DrawMode draw_mode,
ResourceProvider* resource_provider) {
if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
return false;
if (io_surface_changed_) {
WebKit::WebGraphicsContext3D* context3d =
resource_provider->GraphicsContext3D();
if (!context3d) {
// TODO(skaslev): Implement this path for software compositing.
return false;
}
// TODO(ernstm): Do this in a way that we can track memory usage.
if (!io_surface_texture_id_) {
io_surface_texture_id_ = context3d->createTexture();
io_surface_resource_id_ =
resource_provider->CreateResourceFromExternalTexture(
GL_TEXTURE_RECTANGLE_ARB,
io_surface_texture_id_);
}
GLC(context3d,
context3d->bindTexture(GL_TEXTURE_RECTANGLE_ARB,
io_surface_texture_id_));
context3d->texImageIOSurface2DCHROMIUM(GL_TEXTURE_RECTANGLE_ARB,
io_surface_size_.width(),
io_surface_size_.height(),
io_surface_id_,
0);
// Do not check for error conditions. texImageIOSurface2DCHROMIUM() is
// supposed to hold on to the last good IOSurface if the new one is already
// closed. This is only a possibility during live resizing of plugins.
// However, it seems that this is not sufficient to completely guard against
// garbage being drawn. If this is found to be a significant issue, it may
// be necessary to explicitly tell the embedder when to free the surfaces it
// has allocated.
io_surface_changed_ = false;
}
return LayerImpl::WillDraw(draw_mode, resource_provider);
}
void IOSurfaceLayerImpl::AppendQuads(QuadSink* quad_sink,
AppendQuadsData* append_quads_data) {
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<IOSurfaceDrawQuad> quad = IOSurfaceDrawQuad::Create();
quad->SetNew(shared_quad_state,
quad_rect,
opaque_rect,
io_surface_size_,
io_surface_resource_id_,
IOSurfaceDrawQuad::FLIPPED);
quad_sink->Append(quad.PassAs<DrawQuad>(), append_quads_data);
}
void IOSurfaceLayerImpl::DidLoseOutputSurface() {
// We don't have a valid texture ID in the new context; however,
// the IOSurface is still valid.
DestroyTexture();
io_surface_changed_ = true;
}
void IOSurfaceLayerImpl::SetIOSurfaceProperties(unsigned io_surface_id,
gfx::Size size) {
if (io_surface_id_ != io_surface_id)
io_surface_changed_ = true;
io_surface_id_ = io_surface_id;
io_surface_size_ = size;
}
const char* IOSurfaceLayerImpl::LayerTypeAsString() const {
return "cc::IOSurfaceLayerImpl";
}
} // namespace cc
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