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/*
* Copyright 2010, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TileTexture_h
#define TileTexture_h
#include "Color.h"
#include "FloatRect.h"
#include "SkBitmap.h"
#include "SkRect.h"
#include "SkSize.h"
#include "TextureInfo.h"
#include <GLES2/gl2.h>
class SkCanvas;
namespace WebCore {
class TextureOwner;
class Tile;
class TransformationMatrix;
class TileTexture {
public:
// This object is to be constructed on the consumer's thread and must have
// a width and height greater than 0.
TileTexture(uint32_t w, uint32_t h);
virtual ~TileTexture();
// allows consumer thread to assign ownership of the texture to the tile. It
// returns false if ownership cannot be transferred because the tile is busy
bool acquire(TextureOwner* owner);
bool release(TextureOwner* owner);
// set the texture owner if not busy. Return false if busy, true otherwise.
bool setOwner(TextureOwner* owner);
// private member accessor functions
TextureOwner* owner() { return m_owner; } // only used by the consumer thread
const SkSize& getSize() const { return m_size; }
// OpenGL ID of backing texture, 0 when not allocated
GLuint m_ownTextureId;
// these are used for dynamically (de)allocating backing graphics memory
void requireGLTexture();
void discardGLTexture();
void transferComplete();
TextureInfo* getTextureInfo() { return &m_ownTextureInfo; }
// Make sure the following pureColor getter/setter are only read/written
// in UI thread. Therefore no need for a lock.
void setPure(bool pure) { m_isPureColor = pure; }
bool isPureColor() {return m_isPureColor; }
void setPureColor(const Color& color) { m_pureColor = color; setPure(true); }
Color pureColor() { return m_pureColor; }
void drawGL(bool isLayer, const SkRect& rect, float opacity,
const TransformationMatrix* transform, bool forceBlending, bool usePointSampling,
const FloatRect& fillPortion);
private:
TextureInfo m_ownTextureInfo;
SkSize m_size;
// Tile owning the texture, only modified by UI thread
TextureOwner* m_owner;
// When the whole tile is single color, skip the transfer queue and draw
// it directly through shader.
bool m_isPureColor;
Color m_pureColor;
};
} // namespace WebCore
#endif // TileTexture_h
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