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// Copyright 2010 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.
#ifndef CC_LAYERS_TEXTURE_LAYER_H_
#define CC_LAYERS_TEXTURE_LAYER_H_
#include <string>
#include "base/callback.h"
#include "cc/base/cc_export.h"
#include "cc/layers/layer.h"
#include "cc/resources/texture_mailbox.h"
namespace WebKit { class WebGraphicsContext3D; }
namespace cc {
class TextureLayerClient;
// A Layer containing a the rendered output of a plugin instance.
class CC_EXPORT TextureLayer : public Layer {
public:
// If this texture layer requires special preparation logic for each frame
// driven by the compositor, pass in a non-nil client. Pass in a nil client
// pointer if texture updates are driven by an external process.
static scoped_refptr<TextureLayer> Create(TextureLayerClient* client);
// Used when mailbox names are specified instead of texture IDs.
static scoped_refptr<TextureLayer> CreateForMailbox();
void ClearClient() { client_ = NULL; }
virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
OVERRIDE;
// Sets whether this texture should be Y-flipped at draw time. Defaults to
// true.
void SetFlipped(bool flipped);
// Sets a UV transform to be used at draw time. Defaults to (0, 0) and (1, 1).
void SetUV(gfx::PointF top_left, gfx::PointF bottom_right);
// Sets an opacity value per vertex. It will be multiplied by the layer
// opacity value.
void SetVertexOpacity(float bottom_left,
float top_left,
float top_right,
float bottom_right);
// Sets whether the alpha channel is premultiplied or unpremultiplied.
// Defaults to true.
void SetPremultipliedAlpha(bool premultiplied_alpha);
// Sets whether this context should rate limit on damage to prevent too many
// frames from being queued up before the compositor gets a chance to run.
// Requires a non-nil client. Defaults to false.
void SetRateLimitContext(bool rate_limit);
// Code path for plugins which supply their own texture ID.
void SetTextureId(unsigned texture_id);
// Code path for plugins which supply their own mailbox.
void SetTextureMailbox(const TextureMailbox& mailbox);
void WillModifyTexture();
virtual void SetNeedsDisplayRect(const gfx::RectF& dirty_rect) OVERRIDE;
virtual void SetLayerTreeHost(LayerTreeHost* layer_tree_host) OVERRIDE;
virtual bool DrawsContent() const OVERRIDE;
virtual void Update(ResourceUpdateQueue* queue,
const OcclusionTracker* occlusion) OVERRIDE;
virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
virtual bool BlocksPendingCommit() const OVERRIDE;
virtual bool CanClipSelf() const OVERRIDE;
protected:
TextureLayer(TextureLayerClient* client, bool uses_mailbox);
virtual ~TextureLayer();
private:
TextureLayerClient* client_;
bool uses_mailbox_;
bool flipped_;
gfx::PointF uv_top_left_;
gfx::PointF uv_bottom_right_;
// [bottom left, top left, top right, bottom right]
float vertex_opacity_[4];
bool premultiplied_alpha_;
bool rate_limit_context_;
bool context_lost_;
bool content_committed_;
unsigned texture_id_;
TextureMailbox texture_mailbox_;
bool own_mailbox_;
DISALLOW_COPY_AND_ASSIGN(TextureLayer);
};
} // namespace cc
#endif // CC_LAYERS_TEXTURE_LAYER_H_
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