1--TEST-- 2Bug #75124 (gdImageGrayScale() may produce colors) 3--EXTENSIONS-- 4gd 5--SKIPIF-- 6<?php 7if (!GD_BUNDLED && version_compare(GD_VERSION, '2.2.5', '<')) { 8 die('skip only for bundled libgd or external libgd >= 2.2.5'); 9} 10if (!(imagetypes() & IMG_PNG)) { 11 die("skip No PNG support"); 12} 13?> 14--FILE-- 15<?php 16$im = imagecreatefrompng(__DIR__ . '/bug75124.png'); 17var_dump(imageistruecolor($im)); 18imagefilter($im, IMG_FILTER_GRAYSCALE); 19for ($i = 0, $width = imagesx($im); $i < $width; $i ++) { 20 for ($j = 0, $height = imagesy($im); $j < $height; $j++) { 21 $color = imagecolorat($im, $i, $j); 22 $red = ($color >> 16) & 0xff; 23 $green = ($color >> 8) & 0xff; 24 $blue = $color & 0xff; 25 if ($red != $green || $green != $blue) { 26 echo "non grayscale pixel detected\n"; 27 break 2; 28 } 29 } 30} 31?> 32--EXPECT-- 33bool(true) 34
