43 lines
2.6 KiB
C
43 lines
2.6 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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#include "tool/viz/lib/graphic.h"
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void WriteToFrameBuffer(size_t dyn, size_t dxn, unsigned char dst[dyn][dxn][4],
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size_t syn, size_t sxn, float src[syn][sxn][4],
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size_t yn, size_t xn) {
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int ipix[4];
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float fpix[4];
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unsigned y, x, k, upix[4];
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for (y = 0; y < yn; ++y) {
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for (x = 0; x < xn; ++x) {
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for (k = 0; k < 4; ++k) fpix[k] = src[y][x][k];
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for (k = 0; k < 4; ++k) fpix[k] *= 255;
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for (k = 0; k < 4; ++k) ipix[k] = fpix[k] + .5f;
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for (k = 0; k < 4; ++k) upix[k] = MAX(0, ipix[k]);
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for (k = 0; k < 4; ++k) upix[k] = MIN(255, upix[k]);
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dst[y][x][0] = upix[2];
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dst[y][x][1] = upix[1];
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dst[y][x][2] = upix[0];
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dst[y][x][3] = 0;
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}
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}
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}
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