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--TEST-- imageclosest --SKIPIF-- <?php if (!function_exists('imagecolorclosest')) die("skip gd extension not available\n"); ?> --FILE-- <?php $im = imagecreatetruecolor(5,5); $c = imagecolorclosest($im, 255,0,255); printf("%X\n", $c); imagedestroy($im); $im = imagecreate(5,5); $c = imagecolorclosest($im, 255,0,255); print_r(imagecolorsforindex($im, $c)); imagedestroy($im); $im = imagecreate(5,5); imagecolorallocate($im, 255, 0, 255); $c = imagecolorclosest($im, 255,0,255); print_r(imagecolorsforindex($im, $c)); imagedestroy($im); $im = imagecreate(5,5); for ($i=0; $i<255; $i++) imagecolorresolve($im, $i,0,0); $c = imagecolorclosest($im, 255,0,0); print_r(imagecolorsforindex($im, $c)); $im = imagecreate(5,5); for ($i=0; $i<256; $i++) { if ($i == 246) { imagecolorallocate($im, $i,10,10); } else { imagecolorallocate($im, $i,0,0); } } $c = imagecolorclosest($im, 255,10,10); print_r(imagecolorsforindex($im, $c)); // with alpha $im = imagecreatetruecolor(5,5); $c = imagecolorclosestalpha($im, 255,0,255,100); printf("%X\n", $c); imagedestroy($im); $im = imagecreate(5,5); $c = imagecolorclosestalpha($im, 255,0,255,100); print_r(imagecolorsforindex($im, $c)); imagedestroy($im); $im = imagecreate(5,5); imagecolorallocatealpha($im, 255, 0, 255, 1); $c = imagecolorclosestalpha($im, 255,0,255,1); print_r(imagecolorsforindex($im, $c)); imagedestroy($im); $im = imagecreate(5,5); for ($i=0; $i<255; $i++) imagecolorresolvealpha($im, $i,0,0,1); $c = imagecolorclosestalpha($im, 255,0,0,1); print_r(imagecolorsforindex($im, $c)); $im = imagecreate(5,5); for ($i=0; $i<256; $i++) { if ($i == 246) { imagecolorallocatealpha($im, $i,10,10,1); } else { imagecolorallocatealpha($im, $i,0,0,100); } } $c = imagecolorclosestalpha($im, 255,10,10,1); print_r(imagecolorsforindex($im, $c)); ?> --EXPECTF-- FF00FF Warning: imagecolorsforindex(): Color index -1 out of range in %s on line %d Array ( [red] => 255 [green] => 0 [blue] => 255 [alpha] => 0 ) Array ( [red] => 254 [green] => 0 [blue] => 0 [alpha] => 0 ) Array ( [red] => 246 [green] => 10 [blue] => 10 [alpha] => 0 ) 64FF00FF Warning: imagecolorsforindex(): Color index -1 out of range in %s on line %d Array ( [red] => 255 [green] => 0 [blue] => 255 [alpha] => 1 ) Array ( [red] => 254 [green] => 0 [blue] => 0 [alpha] => 1 ) Array ( [red] => 246 [green] => 10 [blue] => 10 [alpha] => 1 )