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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ShaderProgram_h
#define ShaderProgram_h
#if USE(ACCELERATED_COMPOSITING)
#include "FloatRect.h"
#include "IntRect.h"
#include "SkRect.h"
#include "TransformationMatrix.h"
#include <GLES2/gl2.h>
namespace WebCore {
class ShaderProgram {
public:
ShaderProgram();
void init();
int projectionMatrix() { return m_hProjectionMatrix; }
int alpha() { return m_hAlpha; }
int textureSampler() { return m_hTexSampler; }
int program() { return m_program; }
// Drawing
void setViewport(SkRect& viewport);
void drawQuad(SkRect& geometry, int textureId, float opacity);
float zValue(const TransformationMatrix& drawMatrix, float w, float h);
void drawLayerQuad(const TransformationMatrix& drawMatrix,
SkRect& geometry, int textureId, float opacity,
bool forceBlending = false);
void drawVideoLayerQuad(const TransformationMatrix& drawMatrix,
float* textureMatrix, SkRect& geometry, int textureId);
void setViewRect(const IntRect& viewRect);
FloatRect rectInScreenCoord(const TransformationMatrix& drawMatrix,
const IntSize& size);
FloatRect rectInInvScreenCoord(const TransformationMatrix& drawMatrix,
const IntSize& size);
FloatRect rectInInvScreenCoord(const FloatRect& rect);
FloatRect rectInScreenCoord(const FloatRect& rect);
FloatRect convertInvScreenCoordToScreenCoord(const FloatRect& rect);
FloatRect convertScreenCoordToInvScreenCoord(const FloatRect& rect);
void setTitleBarHeight(int height) { m_titleBarHeight = height; }
void setWebViewRect(const IntRect& rect) { m_webViewRect = rect; }
void setScreenClip(const IntRect& clip);
void clip(const FloatRect& rect);
IntRect clippedRectWithViewport(const IntRect& rect, int margin = 0);
void resetBlending();
private:
GLuint loadShader(GLenum shaderType, const char* pSource);
GLuint createProgram(const char* vertexSource, const char* fragmentSource);
void setProjectionMatrix(SkRect& geometry);
void setBlendingState(bool enableBlending);
bool m_blendingEnabled;
int m_program;
int m_videoProgram;
TransformationMatrix m_projectionMatrix;
GLuint m_textureBuffer[1];
TransformationMatrix m_documentToScreenMatrix;
TransformationMatrix m_documentToInvScreenMatrix;
SkRect m_viewport;
IntRect m_viewRect;
FloatRect m_clipRect;
IntRect m_screenClip;
int m_titleBarHeight;
IntRect m_webViewRect;
// uniforms
int m_hProjectionMatrix;
int m_hAlpha;
int m_hTexSampler;
int m_hVideoProjectionMatrix;
int m_hVideoTextureMatrix;
int m_hVideoTexSampler;
// attribs
GLint m_hPosition;
GLint m_hVideoPosition;
};
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)
#endif // ShaderProgram_h
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