Sergey Sharybin
3ec81b814c
Basically filtering was happening twice, first time by applying weights of EWA filter itself and then by applying subpixel offset while reading pixel values.
125 lines
4.1 KiB
C++
125 lines
4.1 KiB
C++
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Contributor:
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* Jeroen Bakker
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* Monique Dewanchand
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*/
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#ifndef _COM_SocketReader_h
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#define _COM_SocketReader_h
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#include "BLI_rect.h"
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#include "COM_defines.h"
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#ifdef WITH_CXX_GUARDEDALLOC
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#include "MEM_guardedalloc.h"
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#endif
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typedef enum PixelSampler {
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COM_PS_NEAREST = 0,
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COM_PS_BILINEAR = 1,
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COM_PS_BICUBIC = 2
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} PixelSampler;
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class MemoryBuffer;
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/**
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* @brief Helper class for reading socket data.
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* Only use this class for dispatching (un-ary and n-ary) executions.
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* @ingroup Execution
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*/
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class SocketReader {
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private:
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protected:
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/**
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* @brief Holds the width of the output of this operation.
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*/
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unsigned int m_width;
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/**
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* @brief Holds the height of the output of this operation.
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*/
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unsigned int m_height;
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/**
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* @brief calculate a single pixel
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* @note this method is called for non-complex
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* @param result is a float[4] array to store the result
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* @param x the x-coordinate of the pixel to calculate in image space
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* @param y the y-coordinate of the pixel to calculate in image space
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* @param inputBuffers chunks that can be read by their ReadBufferOperation.
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*/
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virtual void executePixelSampled(float /*output*/[4],
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float /*x*/,
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float /*y*/,
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PixelSampler /*sampler*/) { }
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/**
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* @brief calculate a single pixel
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* @note this method is called for complex
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* @param result is a float[4] array to store the result
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* @param x the x-coordinate of the pixel to calculate in image space
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* @param y the y-coordinate of the pixel to calculate in image space
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* @param inputBuffers chunks that can be read by their ReadBufferOperation.
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* @param chunkData chunk specific data a during execution time.
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*/
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virtual void executePixel(float output[4], int x, int y, void * /*chunkData*/) {
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executePixelSampled(output, x, y, COM_PS_NEAREST);
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}
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/**
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* @brief calculate a single pixel using an EWA filter
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* @note this method is called for complex
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* @param result is a float[4] array to store the result
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* @param x the x-coordinate of the pixel to calculate in image space
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* @param y the y-coordinate of the pixel to calculate in image space
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* @param dx
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* @param dy
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* @param inputBuffers chunks that can be read by their ReadBufferOperation.
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*/
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virtual void executePixelFiltered(float /*output*/[4],
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float /*x*/, float /*y*/,
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float /*dx*/[2], float /*dy*/[2]) {}
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public:
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inline void readSampled(float result[4], float x, float y, PixelSampler sampler) {
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executePixelSampled(result, x, y, sampler);
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}
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inline void read(float result[4], int x, int y, void *chunkData) {
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executePixel(result, x, y, chunkData);
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}
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inline void readFiltered(float result[4], float x, float y, float dx[2], float dy[2]) {
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executePixelFiltered(result, x, y, dx, dy);
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}
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virtual void *initializeTileData(rcti * /*rect*/) { return 0; }
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virtual void deinitializeTileData(rcti * /*rect*/, void * /*data*/) {}
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virtual ~SocketReader() {}
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virtual MemoryBuffer *getInputMemoryBuffer(MemoryBuffer ** /*memoryBuffers*/) { return 0; }
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inline const unsigned int getWidth() const { return this->m_width; }
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inline const unsigned int getHeight() const { return this->m_height; }
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#ifdef WITH_CXX_GUARDEDALLOC
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MEM_CXX_CLASS_ALLOC_FUNCS("COM:SocketReader")
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#endif
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};
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#endif /* _COM_SocketReader_h */
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