7a395e2e7f
The last good commit wasf57e4c5b98. After this one more fix was committed, this one is preserved as well:67bd678887.
40 lines
1.0 KiB
C++
40 lines
1.0 KiB
C++
/* SPDX-FileCopyrightText: 2011 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#include "COM_AlphaOverKeyOperation.h"
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namespace blender::compositor {
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AlphaOverKeyOperation::AlphaOverKeyOperation()
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{
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flags_.can_be_constant = true;
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}
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void AlphaOverKeyOperation::update_memory_buffer_row(PixelCursor &p)
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{
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for (; p.out < p.row_end; p.next()) {
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const float *color1 = p.color1;
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const float *over_color = p.color2;
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const float value = *p.value;
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if (over_color[3] <= 0.0f) {
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copy_v4_v4(p.out, color1);
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}
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else if (value == 1.0f && over_color[3] >= 1.0f) {
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copy_v4_v4(p.out, over_color);
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}
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else {
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const float premul = value * over_color[3];
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const float mul = 1.0f - premul;
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p.out[0] = (mul * color1[0]) + premul * over_color[0];
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p.out[1] = (mul * color1[1]) + premul * over_color[1];
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p.out[2] = (mul * color1[2]) + premul * over_color[2];
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p.out[3] = (mul * color1[3]) + value * over_color[3];
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}
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}
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}
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} // namespace blender::compositor
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