7a395e2e7f
The last good commit wasf57e4c5b98. After this one more fix was committed, this one is preserved as well:67bd678887.
77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
/* SPDX-FileCopyrightText: 2012 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#include "COM_DisplaceSimpleOperation.h"
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namespace blender::compositor {
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DisplaceSimpleOperation::DisplaceSimpleOperation()
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{
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this->add_input_socket(DataType::Color);
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this->add_input_socket(DataType::Vector);
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this->add_input_socket(DataType::Value);
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this->add_input_socket(DataType::Value);
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this->add_output_socket(DataType::Color);
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flags_.can_be_constant = true;
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}
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void DisplaceSimpleOperation::init_execution()
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{
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width_x4_ = this->get_width() * 4;
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height_x4_ = this->get_height() * 4;
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}
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void DisplaceSimpleOperation::get_area_of_interest(const int input_idx,
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const rcti &output_area,
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rcti &r_input_area)
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{
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switch (input_idx) {
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case 0: {
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r_input_area = get_input_operation(input_idx)->get_canvas();
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break;
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}
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default: {
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r_input_area = output_area;
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break;
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}
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}
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}
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void DisplaceSimpleOperation::update_memory_buffer_partial(MemoryBuffer *output,
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const rcti &area,
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Span<MemoryBuffer *> inputs)
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{
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const float width = this->get_width();
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const float height = this->get_height();
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const MemoryBuffer *input_color = inputs[0];
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for (BuffersIterator<float> it = output->iterate_with(inputs.drop_front(1), area); !it.is_end();
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++it)
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{
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float scale_x = *it.in(1);
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float scale_y = *it.in(2);
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/* Clamp x and y displacement to triple image resolution -
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* to prevent hangs from huge values mistakenly plugged in eg. z buffers. */
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CLAMP(scale_x, -width_x4_, width_x4_);
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CLAMP(scale_y, -height_x4_, height_x4_);
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/* Main displacement in pixel space. */
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const float *vector = it.in(0);
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const float p_dx = vector[0] * scale_x;
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const float p_dy = vector[1] * scale_y;
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/* Displaced pixel in uv coords, for image sampling. */
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/* Clamp nodes to avoid glitches. */
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float u = it.x - p_dx + 0.5f;
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float v = it.y - p_dy + 0.5f;
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CLAMP(u, 0.0f, width - 1.0f);
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CLAMP(v, 0.0f, height - 1.0f);
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input_color->read_elem_checked(u, v, it.out);
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}
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}
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} // namespace blender::compositor
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