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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright 2011, Blender Foundation.
*/
#include <cmath>
#include "COM_WrapOperation.h"
WrapOperation::WrapOperation(DataType datatype) : ReadBufferOperation(datatype)
{
this->m_wrappingType = CMP_NODE_WRAP_NONE;
}
inline float WrapOperation::getWrappedOriginalXPos(float x)
{
if (this->getWidth() == 0) {
return 0;
}
while (x < 0) {
x += this->m_width;
}
return fmodf(x, this->getWidth());
}
inline float WrapOperation::getWrappedOriginalYPos(float y)
{
if (this->getHeight() == 0) {
return 0;
}
while (y < 0) {
y += this->m_height;
}
return fmodf(y, this->getHeight());
}
void WrapOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler)
{
float nx, ny;
nx = x;
ny = y;
MemoryBufferExtend extend_x = MemoryBufferExtend::Clip, extend_y = MemoryBufferExtend::Clip;
switch (m_wrappingType) {
case CMP_NODE_WRAP_NONE:
// Intentionally empty, originalXPos and originalYPos have been set before
break;
case CMP_NODE_WRAP_X:
// wrap only on the x-axis
nx = this->getWrappedOriginalXPos(x);
extend_x = MemoryBufferExtend::Repeat;
break;
case CMP_NODE_WRAP_Y:
// wrap only on the y-axis
ny = this->getWrappedOriginalYPos(y);
extend_y = MemoryBufferExtend::Repeat;
break;
case CMP_NODE_WRAP_XY:
// wrap on both
nx = this->getWrappedOriginalXPos(x);
ny = this->getWrappedOriginalYPos(y);
extend_x = MemoryBufferExtend::Repeat;
extend_y = MemoryBufferExtend::Repeat;
break;
}
executePixelExtend(output, nx, ny, sampler, extend_x, extend_y);
}
bool WrapOperation::determineDependingAreaOfInterest(rcti *input,
ReadBufferOperation *readOperation,
rcti *output)
{
rcti newInput;
newInput.xmin = input->xmin;
newInput.xmax = input->xmax;
newInput.ymin = input->ymin;
newInput.ymax = input->ymax;
if (ELEM(m_wrappingType, CMP_NODE_WRAP_X, CMP_NODE_WRAP_XY)) {
// wrap only on the x-axis if tile is wrapping
newInput.xmin = getWrappedOriginalXPos(input->xmin);
newInput.xmax = roundf(getWrappedOriginalXPos(input->xmax));
if (newInput.xmin >= newInput.xmax) {
newInput.xmin = 0;
newInput.xmax = this->getWidth();
}
}
if (ELEM(m_wrappingType, CMP_NODE_WRAP_Y, CMP_NODE_WRAP_XY)) {
// wrap only on the y-axis if tile is wrapping
newInput.ymin = getWrappedOriginalYPos(input->ymin);
newInput.ymax = roundf(getWrappedOriginalYPos(input->ymax));
if (newInput.ymin >= newInput.ymax) {
newInput.ymin = 0;
newInput.ymax = this->getHeight();
}
}
return ReadBufferOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}
void WrapOperation::setWrapping(int wrapping_type)
{
m_wrappingType = wrapping_type;
}
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