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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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tool/viz/lib/writetoframebuffer.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.h"
#include "tool/viz/lib/graphic.h"
void WriteToFrameBuffer(size_t dyn, size_t dxn, unsigned char dst[dyn][dxn][4],
size_t syn, size_t sxn, float src[syn][sxn][4],
size_t yn, size_t xn) {
int ipix[4];
float fpix[4];
unsigned y, x, k, upix[4];
for (y = 0; y < yn; ++y) {
for (x = 0; x < xn; ++x) {
for (k = 0; k < 4; ++k) fpix[k] = src[y][x][k];
for (k = 0; k < 4; ++k) fpix[k] *= 255;
for (k = 0; k < 4; ++k) ipix[k] = fpix[k] + .5f;
for (k = 0; k < 4; ++k) upix[k] = MAX(0, ipix[k]);
for (k = 0; k < 4; ++k) upix[k] = MIN(255, upix[k]);
dst[y][x][0] = upix[2];
dst[y][x][1] = upix[1];
dst[y][x][2] = upix[0];
dst[y][x][3] = 0;
}
}
}