5f667fa2bc
Code can become quite a bit smaller without intermediate structs Pull Request: https://projects.blender.org/blender/blender/pulls/135299
98 lines
2.2 KiB
C++
98 lines
2.2 KiB
C++
/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
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* SPDX-FileCopyrightText: 2024 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup imbuf
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*/
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#include "BLI_math_vector.h"
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#include "BLI_task.hh"
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#include "IMB_imbuf.hh"
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#include "IMB_imbuf_types.hh"
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void IMB_convert_rgba_to_abgr(ImBuf *ibuf)
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{
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size_t size;
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uchar rt, *cp = ibuf->byte_buffer.data;
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float rtf, *cpf = ibuf->float_buffer.data;
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if (ibuf->byte_buffer.data) {
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size = ibuf->x * ibuf->y;
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while (size-- > 0) {
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rt = cp[0];
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cp[0] = cp[3];
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cp[3] = rt;
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rt = cp[1];
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cp[1] = cp[2];
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cp[2] = rt;
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cp += 4;
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}
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}
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if (ibuf->float_buffer.data) {
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size = ibuf->x * ibuf->y;
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while (size-- > 0) {
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rtf = cpf[0];
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cpf[0] = cpf[3];
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cpf[3] = rtf;
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rtf = cpf[1];
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cpf[1] = cpf[2];
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cpf[2] = rtf;
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cpf += 4;
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}
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}
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}
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/* -------------------------------------------------------------------- */
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/** \name Alpha-under
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* \{ */
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void IMB_alpha_under_color_float(float *rect_float, int x, int y, float backcol[3])
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{
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using namespace blender;
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threading::parallel_for(IndexRange(int64_t(x) * y), 32 * 1024, [&](const IndexRange i_range) {
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float *pix = rect_float + i_range.first() * 4;
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for ([[maybe_unused]] const int i : i_range) {
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const float mul = 1.0f - pix[3];
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madd_v3_v3fl(pix, backcol, mul);
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pix[3] = 1.0f;
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pix += 4;
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}
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});
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}
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void IMB_alpha_under_color_byte(uchar *rect, int x, int y, const float backcol[3])
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{
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using namespace blender;
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threading::parallel_for(IndexRange(int64_t(x) * y), 32 * 1024, [&](const IndexRange i_range) {
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uchar *pix = rect + i_range.first() * 4;
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for ([[maybe_unused]] const int i : i_range) {
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if (pix[3] == 255) {
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/* pass */
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}
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else if (pix[3] == 0) {
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pix[0] = backcol[0] * 255;
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pix[1] = backcol[1] * 255;
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pix[2] = backcol[2] * 255;
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}
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else {
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float alpha = pix[3] / 255.0;
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float mul = 1.0f - alpha;
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pix[0] = (pix[0] * alpha) + mul * backcol[0];
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pix[1] = (pix[1] * alpha) + mul * backcol[1];
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pix[2] = (pix[2] * alpha) + mul * backcol[2];
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}
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pix[3] = 255;
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pix += 4;
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}
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});
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}
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/** \} */
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