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).
55 lines
2.1 KiB
C++
55 lines
2.1 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_ReadBufferOperation_h
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#define _COM_ReadBufferOperation_h
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#include "COM_NodeOperation.h"
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#include "COM_MemoryProxy.h"
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class ReadBufferOperation : public NodeOperation {
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private:
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MemoryProxy *m_memoryProxy;
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bool m_single_value; /* single value stored in buffer, copied from associated write operation */
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unsigned int m_offset;
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MemoryBuffer *m_buffer;
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public:
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ReadBufferOperation();
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int isBufferOperation() { return true; }
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void setMemoryProxy(MemoryProxy *memoryProxy) { this->m_memoryProxy = memoryProxy; }
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MemoryProxy *getMemoryProxy() { return this->m_memoryProxy; }
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void determineResolution(unsigned int resolution[2], unsigned int preferredResolution[2]);
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void *initializeTileData(rcti *rect);
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void executePixel(float output[4], float x, float y, PixelSampler sampler);
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void executePixel(float output[4], float x, float y, float dx, float dy, PixelSampler sampler);
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const bool isReadBufferOperation() const { return true; }
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void setOffset(unsigned int offset) { this->m_offset = offset; }
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unsigned int getOffset() { return this->m_offset; }
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bool determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output);
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MemoryBuffer *getInputMemoryBuffer(MemoryBuffer **memoryBuffers) { return memoryBuffers[this->m_offset]; }
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void readResolutionFromWriteBuffer();
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void updateMemoryBuffer();
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};
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#endif
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