1 <?php
2 // phpcs:ignoreFile -- deprecated and will be removed
3 /**
4  * This script generates a sprite from the unprocessed pagetool icons by combining them
5  * and overlaying a color layer for the active state.
6  *
7  * This script requires a current libGD to be available.
8  *
9  * The color for the active state is read from the style.ini's __link__ replacement
10  *
11  * The final sprite is optimized with optipng if available.
12  *
13  * @author Andreas Gohr <andi@splitbrain.org>
14  * @deprecated 2018-06-15 we no longer use PNG based icons
15  * @todo   Maybe add some more error checking
16  */
17 $GAMMA = 0.8;
18 $OPTIPNG = '/usr/bin/optipng';
19 
20 if('cli' != PHP_SAPI) die('please run from commandline');
21 
22 // load input images
23 $input = glob('pagetools/*.png');
24 sort($input);
25 $cnt   = count($input);
26 if(!$cnt){
27     die("No input images found. This script needs to be called from within the image directory!\n");
28 }
29 
30 // create destination image
31 $DST = imagecreatetruecolor(30,$cnt*45*2);
32 imagesavealpha($DST, true);
33 $C_trans = imagecolorallocatealpha($DST, 0, 0, 0, 127);
34 imagefill($DST, 0, 0, $C_trans);
35 
36 // load highlight color from style.ini
37 $ini = parse_ini_file('../style.ini',true);
38 $COLOR = hex2rgb($ini['replacements']['__link__']);
39 $C_active = imagecolorallocate($DST, $COLOR['r'],$COLOR['g'],$COLOR['b']);
40 
41 // add all the icons to the sprite image
42 for($i=0; $i<$cnt; $i++){
43     $base = $i*90;
44 
45     $IN = imagecreatefrompng($input[$i]);
46     imagesavealpha($IN, true);
47     imagecolorscale($IN,$GAMMA);
48     imagecopy($DST,$IN, 0,$base, 0,0, 30,30);
49     imagedestroy($IN);
50 
51     $IN = imagecreatefrompng($input[$i]);
52     imagesavealpha($IN, true);
53     imagecolorscale($IN,$GAMMA);
54     imagecopy($DST,$IN, 0,$base+45, 0,0, 30,30);
55     imagedestroy($IN);
56 
57     imagelayereffect($DST, IMG_EFFECT_OVERLAY);
58     imagefilledrectangle($DST, 0,$base+45, 30,$base+45+30, $C_active);
59     imagelayereffect($DST, IMG_EFFECT_NORMAL);
60 }
61 
62 // output sprite
63 imagepng($DST,'pagetools-sprite.png');
64 imagedestroy($DST);
65 
66 // optimize if possible
67 if(is_executable($OPTIPNG)){
68     system("$OPTIPNG -o5 'pagetools-sprite.png'");
69 }
70 
71 /**
72  * Convert a hex color code to an rgb array
73  */
74 function hex2rgb($hex) {
75     // strip hash
76     $hex = str_replace('#', '', $hex);
77 
78     // normalize short codes
79     if(strlen($hex) == 3){
80         $hex = substr($hex,0,1).
81                substr($hex,0,1).
82                substr($hex,1,1).
83                substr($hex,1,1).
84                substr($hex,2,1).
85                substr($hex,2,1);
86     }
87 
88     // calc rgb
89     return ['r' => hexdec(substr($hex, 0, 2)), 'g' => hexdec(substr($hex, 2, 2)), 'b' => hexdec(substr($hex, 4, 2))];
90 }
91 
92 /**
93  * Scale (darken/lighten) a given image
94  *
95  * @param resource $img    The truetype GD image to work on
96  * @param float     $scale  Scale the colors by this value ( <1 darkens, >1 lightens)
97  */
98 function imagecolorscale(&$img, $scale){
99     $w = imagesx($img);
100     $h = imagesy($img);
101 
102     imagealphablending($img, false);
103     for($x = 0; $x < $w; $x++){
104         for($y = 0; $y < $h; $y++){
105             $rgba   = imagecolorat($img, $x, $y);
106             $a = ($rgba >> 24) & 0xFF;
107             $r = ($rgba >> 16) & 0xFF;
108             $g = ($rgba >> 8) & 0xFF;
109             $b = $rgba & 0xFF;
110 
111             $r = max(min(round($r*$scale),255),0);
112             $g = max(min(round($g*$scale),255),0);
113             $b = max(min(round($b*$scale),255),0);
114 
115             $color = imagecolorallocatealpha($img, $r, $g, $b, $a);
116             imagesetpixel($img, $x, $y, $color);
117         }
118     }
119     imagealphablending($img, true);
120 }
121 
122