Zabbix
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<?php/*** Copyright (C) 2001-2025 Zabbix SIA**** This program is free software: you can redistribute it and/or modify it under the terms of** the GNU Affero General Public License as published by the Free Software Foundation, version 3.**** 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 Affero General Public License for more details.**** You should have received a copy of the GNU Affero General Public License along with this program.** If not, see <https://www.gnu.org/licenses/>.**//** * Calculate new color based on bg/fg colors and transparency index * * @param resource $image image reference * @param array $bgColor background color, array of RGB * @param array $fgColor foreground color, array of RGB * @param float $alpha transparency index in range of 0-1, 1 returns unchanged fgColor color * * @return int A color index. */function zbx_colormix($image, $bgColor, $fgColor, $alpha) { $r = $bgColor[0] + ($fgColor[0] - $bgColor[0]) * $alpha; $g = $bgColor[1] + ($fgColor[1] - $bgColor[1]) * $alpha; $b = $bgColor[2] + ($fgColor[2] - $bgColor[2]) * $alpha; return imagecolorresolvealpha($image, (int) $r, (int) $g, (int) $b, 0);}/** * Draw normal line. * PHP imageline() function is broken because it drops fraction instead of correct rounding of X/Y coordinates. * All calls to imageline() must be replaced by the wrapper function everywhere in the code. * * @param resource $image image reference * @param int $x1 first x coordinate * @param int $y1 first y coordinate * @param int $x2 second x coordinate * @param int $y2 second y coordinate * @param int $color line color */function zbx_imageline($image, $x1, $y1, $x2, $y2, $color) { imageline($image, round($x1), round($y1), round($x2), round($y2), $color);}/** * Draw antialiased line * * @param resource $image image reference * @param int $x1 first x coordinate * @param int $y1 first y coordinate * @param int $x2 second x coordinate * @param int $y2 second y coordinate * @param int $color line color * @param int $style line style, one of LINE_TYPE_NORMAL (default), LINE_TYPE_BOLD (bold line) */function zbx_imagealine($image, $x1, $y1, $x2, $y2, $color, $style = LINE_TYPE_NORMAL) { $x1 = round($x1);