63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
|
|
* SPDX-FileCopyrightText: 2024 Blender Authors
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
|
|
/** \file
|
|
* \ingroup imbuf
|
|
*/
|
|
|
|
#include "BLI_math_vector.h"
|
|
#include "BLI_task.hh"
|
|
|
|
#include "IMB_imbuf.hh"
|
|
#include "IMB_imbuf_types.hh"
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/** \name Alpha-under
|
|
* \{ */
|
|
|
|
void IMB_alpha_under_color_float(float *rect_float, int x, int y, float backcol[3])
|
|
{
|
|
using namespace blender;
|
|
threading::parallel_for(IndexRange(int64_t(x) * y), 32 * 1024, [&](const IndexRange i_range) {
|
|
float *pix = rect_float + i_range.first() * 4;
|
|
for ([[maybe_unused]] const int i : i_range) {
|
|
const float mul = 1.0f - pix[3];
|
|
madd_v3_v3fl(pix, backcol, mul);
|
|
pix[3] = 1.0f;
|
|
pix += 4;
|
|
}
|
|
});
|
|
}
|
|
|
|
void IMB_alpha_under_color_byte(uchar *rect, int x, int y, const float backcol[3])
|
|
{
|
|
using namespace blender;
|
|
threading::parallel_for(IndexRange(int64_t(x) * y), 32 * 1024, [&](const IndexRange i_range) {
|
|
uchar *pix = rect + i_range.first() * 4;
|
|
for ([[maybe_unused]] const int i : i_range) {
|
|
if (pix[3] == 255) {
|
|
/* pass */
|
|
}
|
|
else if (pix[3] == 0) {
|
|
pix[0] = backcol[0] * 255;
|
|
pix[1] = backcol[1] * 255;
|
|
pix[2] = backcol[2] * 255;
|
|
}
|
|
else {
|
|
float alpha = pix[3] / 255.0;
|
|
float mul = 1.0f - alpha;
|
|
|
|
pix[0] = (pix[0] * alpha) + mul * backcol[0];
|
|
pix[1] = (pix[1] * alpha) + mul * backcol[1];
|
|
pix[2] = (pix[2] * alpha) + mul * backcol[2];
|
|
}
|
|
pix[3] = 255;
|
|
pix += 4;
|
|
}
|
|
});
|
|
}
|
|
|
|
/** \} */
|