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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"
namespace blender::compositor {
WrapOperation::WrapOperation(DataType datatype) : ReadBufferOperation(datatype)
{
wrapping_type_ = CMP_NODE_WRAP_NONE;
}
inline float WrapOperation::get_wrapped_original_xpos(float x)
{
if (this->get_width() == 0) {
return 0;
}
while (x < 0) {
x += this->get_width();
}
return fmodf(x, this->get_width());
}
inline float WrapOperation::get_wrapped_original_ypos(float y)
{
if (this->get_height() == 0) {
return 0;
}
while (y < 0) {
y += this->get_height();
}
return fmodf(y, this->get_height());
}
void WrapOperation::execute_pixel_sampled(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 (wrapping_type_) {
case CMP_NODE_WRAP_NONE:
/* Intentionally empty, original_xpos and original_ypos have been set before. */
break;
case CMP_NODE_WRAP_X:
/* Wrap only on the x-axis. */
nx = this->get_wrapped_original_xpos(x);
extend_x = MemoryBufferExtend::Repeat;
break;
case CMP_NODE_WRAP_Y:
/* Wrap only on the y-axis. */
ny = this->get_wrapped_original_ypos(y);
extend_y = MemoryBufferExtend::Repeat;
break;
case CMP_NODE_WRAP_XY:
/* Wrap on both. */
nx = this->get_wrapped_original_xpos(x);
ny = this->get_wrapped_original_ypos(y);
extend_x = MemoryBufferExtend::Repeat;
extend_y = MemoryBufferExtend::Repeat;
break;
}
execute_pixel_extend(output, nx, ny, sampler, extend_x, extend_y);
}
bool WrapOperation::determine_depending_area_of_interest(rcti *input,
ReadBufferOperation *read_operation,
rcti *output)
{
rcti new_input;
new_input.xmin = input->xmin;
new_input.xmax = input->xmax;
new_input.ymin = input->ymin;
new_input.ymax = input->ymax;
if (ELEM(wrapping_type_, CMP_NODE_WRAP_X, CMP_NODE_WRAP_XY)) {
/* Wrap only on the x-axis if tile is wrapping. */
new_input.xmin = get_wrapped_original_xpos(input->xmin);
new_input.xmax = roundf(get_wrapped_original_xpos(input->xmax));
if (new_input.xmin >= new_input.xmax) {
new_input.xmin = 0;
new_input.xmax = this->get_width();
}
}
if (ELEM(wrapping_type_, CMP_NODE_WRAP_Y, CMP_NODE_WRAP_XY)) {
/* Wrap only on the y-axis if tile is wrapping. */
new_input.ymin = get_wrapped_original_ypos(input->ymin);
new_input.ymax = roundf(get_wrapped_original_ypos(input->ymax));
if (new_input.ymin >= new_input.ymax) {
new_input.ymin = 0;
new_input.ymax = this->get_height();
}
}
return ReadBufferOperation::determine_depending_area_of_interest(
&new_input, read_operation, output);
}
void WrapOperation::set_wrapping(int wrapping_type)
{
wrapping_type_ = wrapping_type;
}
} // namespace blender::compositor
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