8d1c0b6f0f
Problem is that the read/write buffer operations only work with actual image inputs. If a singular value is used as group input no actual buffer will be created, the write operation does not schedule any chunks and the ReadBufferOperation subsequently returns zero (MemoryBuffer::read). The fix uses the (0,0) resolution to detect single value input of the WriteBufferOperation. The actual resolution is then clamped to (1,1) to ensure we have a single pixel to store the value in. A m_single_value flag is also set, so we can reliably distinguish this from genuine image resolutions without having to check m_width/m_height later on. The ReadBufferOperation copies this flag from the associated WriteBufferOperation and if set will always return the single value from pixel (0,0).
58 lines
2.0 KiB
C++
58 lines
2.0 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_WriteBufferOperation_h_
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#define _COM_WriteBufferOperation_h_
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#include "COM_NodeOperation.h"
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#include "COM_MemoryProxy.h"
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#include "COM_SocketReader.h"
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/**
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* @brief Operation to write to a tile
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* @ingroup Operation
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*/
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class WriteBufferOperation : public NodeOperation {
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MemoryProxy *m_memoryProxy;
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bool m_single_value; /* single value stored in buffer */
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NodeOperation *m_input;
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public:
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WriteBufferOperation();
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~WriteBufferOperation();
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int isBufferOperation() { return true; }
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MemoryProxy *getMemoryProxy() { return this->m_memoryProxy; }
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void executePixel(float output[4], float x, float y, PixelSampler sampler);
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const bool isWriteBufferOperation() const { return true; }
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bool isSingleValue() const { return m_single_value; }
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void executeRegion(rcti *rect, unsigned int tileNumber);
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void initExecution();
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void deinitExecution();
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void executeOpenCLRegion(OpenCLDevice *device, rcti *rect, unsigned int chunkNumber, MemoryBuffer **memoryBuffers, MemoryBuffer *outputBuffer);
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void determineResolution(unsigned int resolution[2], unsigned int preferredResolution[2]);
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void readResolutionFromInputSocket();
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inline NodeOperation *getInput() {
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return m_input;
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}
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};
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#endif
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