CustomFilterShader.h   [plain text]

/*
 * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer.
 * 2. 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 HOLDER “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 HOLDER 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 CustomFilterShader_h
#define CustomFilterShader_h

#if ENABLE(CSS_SHADERS) && ENABLE(WEBGL)

#include "GraphicsTypes3D.h"
#include <wtf/RefCounted.h>
#include <wtf/text/WTFString.h>

namespace WebCore {

class GraphicsContext3D;

class CustomFilterShader: public RefCounted<CustomFilterShader> {
public:
    static PassRefPtr<CustomFilterShader> create(GraphicsContext3D* context, const String& vertexShader, const String& fragmentShader)
    {
        return adoptRef(new CustomFilterShader(context, vertexShader, fragmentShader));
    }
    
    ~CustomFilterShader();
    
    String vertexShaderString() const { return m_vertexShaderString; }
    String fragmentShaderString() const { return m_fragmentShaderString; }
    
    int positionAttribLocation() const { return m_positionAttribLocation; }
    int texAttribLocation() const { return m_texAttribLocation; }
    int meshAttribLocation() const { return m_meshAttribLocation; }
    int triangleAttribLocation() const { return m_triangleAttribLocation; }
    int meshBoxLocation() const { return m_meshBoxLocation; }
    int projectionMatrixLocation() const { return m_projectionMatrixLocation; }
    int tileSizeLocation() const { return m_tileSizeLocation; }
    int meshSizeLocation() const { return m_meshSizeLocation; }
    int samplerLocation() const { return m_samplerLocation; }
    int contentSamplerLocation() const { return m_contentSamplerLocation; }
    int samplerSizeLocation() const { return m_samplerSizeLocation; }

    int uniformLocationByName(const String&);
    
    bool isInitialized() const { return m_isInitialized; }
    
    Platform3DObject program() const { return m_program; }

private:
    CustomFilterShader(GraphicsContext3D*, const String& vertexShader, const String& fragmentShader);
    
    Platform3DObject compileShader(GC3Denum shaderType, const String& shaderString);
    Platform3DObject linkProgram(Platform3DObject vertexShader, Platform3DObject fragmentShader);
    void initializeParameterLocations();
    
    static String defaultVertexShaderString();
    static String defaultFragmentShaderString();
    
    RefPtr<GraphicsContext3D> m_context;
    
    String m_vertexShaderString;
    String m_fragmentShaderString;

    Platform3DObject m_program;
    
    int m_positionAttribLocation;
    int m_texAttribLocation;
    int m_meshAttribLocation;
    int m_triangleAttribLocation;
    int m_meshBoxLocation;
    int m_projectionMatrixLocation;
    int m_tileSizeLocation;
    int m_meshSizeLocation;
    int m_samplerLocation;
    int m_samplerSizeLocation;
    int m_contentSamplerLocation;
    
    bool m_isInitialized;
};

}

#endif // ENABLE(CSS_SHADERS) && ENABLE(WEBGL)

#endif