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).
103 lines
3.0 KiB
C++
103 lines
3.0 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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#include "COM_ReadBufferOperation.h"
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#include "COM_WriteBufferOperation.h"
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#include "COM_defines.h"
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ReadBufferOperation::ReadBufferOperation() : NodeOperation()
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{
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this->addOutputSocket(COM_DT_COLOR);
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this->m_single_value = false;
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this->m_offset = 0;
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this->m_buffer = NULL;
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}
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void *ReadBufferOperation::initializeTileData(rcti *rect)
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{
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return m_buffer;
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}
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void ReadBufferOperation::determineResolution(unsigned int resolution[2], unsigned int preferredResolution[2])
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{
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if (this->m_memoryProxy != NULL) {
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WriteBufferOperation *operation = this->m_memoryProxy->getWriteBufferOperation();
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operation->determineResolution(resolution, preferredResolution);
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operation->setResolution(resolution);
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/// @todo: may not occur!, but does with blur node
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if (this->m_memoryProxy->getExecutor()) {
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this->m_memoryProxy->getExecutor()->setResolution(resolution);
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}
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m_single_value = operation->isSingleValue();
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}
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}
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void ReadBufferOperation::executePixel(float output[4], float x, float y, PixelSampler sampler)
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{
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if (m_single_value) {
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/* write buffer has a single value stored at (0,0) */
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m_buffer->read(output, 0, 0);
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}
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else if (sampler == COM_PS_NEAREST) {
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m_buffer->read(output, x, y);
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}
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else {
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m_buffer->readCubic(output, x, y);
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}
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}
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void ReadBufferOperation::executePixel(float output[4], float x, float y, float dx, float dy, PixelSampler sampler)
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{
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if (m_single_value) {
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/* write buffer has a single value stored at (0,0) */
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m_buffer->read(output, 0, 0);
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}
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else {
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m_buffer->readEWA(output, x, y, dx, dy, sampler);
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}
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}
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bool ReadBufferOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output)
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{
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if (this == readOperation) {
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BLI_rcti_init(output, input->xmin, input->xmax, input->ymin, input->ymax);
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return true;
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}
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return false;
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}
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void ReadBufferOperation::readResolutionFromWriteBuffer()
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{
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if (this->m_memoryProxy != NULL) {
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WriteBufferOperation *operation = this->m_memoryProxy->getWriteBufferOperation();
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this->setWidth(operation->getWidth());
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this->setHeight(operation->getHeight());
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}
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}
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void ReadBufferOperation::updateMemoryBuffer()
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{
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this->m_buffer = this->getMemoryProxy()->getBuffer();
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}
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