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      1 /*
      2  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
      3  * Copyright (C) 2013 Google Inc. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1. Redistributions of source code must retain the above
     10  *    copyright notice, this list of conditions and the following
     11  *    disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above
     13  *    copyright notice, this list of conditions and the following
     14  *    disclaimer in the documentation and/or other materials
     15  *    provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AS IS AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
     21  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
     22  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
     26  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
     27  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28  * SUCH DAMAGE.
     29  */
     30 
     31 #ifndef FECustomFilter_h
     32 #define FECustomFilter_h
     33 
     34 #include "core/platform/graphics/GraphicsTypes3D.h"
     35 #include "core/platform/graphics/filters/Filter.h"
     36 #include "core/platform/graphics/filters/FilterEffect.h"
     37 #include "core/platform/graphics/filters/custom/CustomFilterConstants.h"
     38 #include "core/platform/graphics/filters/custom/CustomFilterOperation.h"
     39 #include "wtf/RefPtr.h"
     40 
     41 namespace WebCore {
     42 
     43 class CustomFilterRenderer;
     44 class CustomFilterValidatedProgram;
     45 class GraphicsContext3D;
     46 class IntSize;
     47 
     48 class FECustomFilter : public FilterEffect {
     49 public:
     50     static PassRefPtr<FECustomFilter> create(Filter*, PassRefPtr<GraphicsContext3D>, PassRefPtr<CustomFilterValidatedProgram>, const CustomFilterParameterList&,
     51         unsigned meshRows, unsigned meshColumns, CustomFilterMeshType);
     52 
     53     virtual TextStream& externalRepresentation(TextStream&, int indention) const;
     54 
     55 private:
     56     FECustomFilter(Filter*, PassRefPtr<GraphicsContext3D>, PassRefPtr<CustomFilterValidatedProgram>, const CustomFilterParameterList&,
     57         unsigned meshRows, unsigned meshColumns, CustomFilterMeshType);
     58     ~FECustomFilter();
     59 
     60     virtual void applySoftware() OVERRIDE;
     61 
     62     bool applyShader();
     63     void clearShaderResult();
     64     bool initializeContext();
     65 
     66     bool prepareForDrawing();
     67 
     68     void drawFilterMesh(Platform3DObject inputTexture);
     69     bool ensureInputTexture();
     70     void uploadInputTexture(Uint8ClampedArray* srcPixelArray);
     71     bool resizeContextIfNeeded(const IntSize&);
     72     bool resizeContext(const IntSize&);
     73 
     74     bool canUseMultisampleBuffers() const;
     75     bool createMultisampleBuffer();
     76     bool resizeMultisampleBuffers(const IntSize&);
     77     void resolveMultisampleBuffer();
     78     void deleteMultisampleRenderBuffers();
     79 
     80     bool ensureFrameBuffer();
     81     void deleteRenderBuffers();
     82 
     83     RefPtr<GraphicsContext3D> m_context;
     84     RefPtr<CustomFilterValidatedProgram> m_validatedProgram;
     85     RefPtr<CustomFilterRenderer> m_customFilterRenderer;
     86     IntSize m_contextSize;
     87 
     88     Platform3DObject m_inputTexture;
     89     Platform3DObject m_frameBuffer;
     90     Platform3DObject m_depthBuffer;
     91     Platform3DObject m_destTexture;
     92 
     93     bool m_triedMultisampleBuffer;
     94     Platform3DObject m_multisampleFrameBuffer;
     95     Platform3DObject m_multisampleRenderBuffer;
     96     Platform3DObject m_multisampleDepthBuffer;
     97 };
     98 
     99 } // namespace WebCore
    100 
    101 #endif // FECustomFilter_h
    102