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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/texture_layer_impl.h"
#include "base/stringprintf.h"
#include "cc/quad_sink.h"
#include "cc/renderer.h"
#include "cc/texture_draw_quad.h"
namespace cc {
TextureLayerImpl::TextureLayerImpl(int id)
: LayerImpl(id)
, m_textureId(0)
, m_externalTextureResource(0)
, m_premultipliedAlpha(true)
, m_flipped(true)
, m_uvRect(0, 0, 1, 1)
{
}
TextureLayerImpl::~TextureLayerImpl()
{
}
void TextureLayerImpl::willDraw(ResourceProvider* resourceProvider)
{
if (!m_textureId)
return;
DCHECK(!m_externalTextureResource);
m_externalTextureResource = resourceProvider->createResourceFromExternalTexture(m_textureId);
}
void TextureLayerImpl::appendQuads(QuadSink& quadSink, AppendQuadsData& appendQuadsData)
{
if (!m_externalTextureResource)
return;
SharedQuadState* sharedQuadState = quadSink.useSharedQuadState(createSharedQuadState());
appendDebugBorderQuad(quadSink, sharedQuadState, appendQuadsData);
gfx::Rect quadRect(gfx::Point(), contentBounds());
gfx::Rect opaqueRect(contentsOpaque() ? quadRect : gfx::Rect());
quadSink.append(TextureDrawQuad::create(sharedQuadState, quadRect, opaqueRect, m_externalTextureResource, m_premultipliedAlpha, m_uvRect, m_flipped).PassAs<DrawQuad>(), appendQuadsData);
}
void TextureLayerImpl::didDraw(ResourceProvider* resourceProvider)
{
if (!m_externalTextureResource)
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(!resourceProvider->inUseByConsumer(m_externalTextureResource));
resourceProvider->deleteResource(m_externalTextureResource);
m_externalTextureResource = 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", m_textureId, m_premultipliedAlpha);
LayerImpl::dumpLayerProperties(str, indent);
}
void TextureLayerImpl::didLoseContext()
{
m_textureId = 0;
m_externalTextureResource = 0;
}
const char* TextureLayerImpl::layerTypeAsString() const
{
return "TextureLayer";
}
} // namespace cc
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