source: src/router/php7/ext/gd/tests/imagecopyresampled_variation1.phpt @ 31874

Last change on this file since 31874 was 31874, checked in by brainslayer, 3 months ago

update php

File size: 1.9 KB
Line 
1--TEST--
2Test for correct colors of imagecopyresampled() wrt. alpha
3--SKIPIF--
4<?php
5if (!extension_loaded('gd')) die('skip ext/gd required');
6?>
7--FILE--
8<?php
9
10const EXP_RED = 66;
11const EXP_GREEN = 66;
12const EXP_BLUE = 133;
13const EXP_ALPHA = 32;
14
15/* create the source image */
16$im = imagecreatetruecolor(10, 10);
17imagealphablending($im, false);
18$solid = imagecolorallocate($im, 0, 100, 150);
19$transparent = imagecolorallocatealpha($im, 200, 0, 100, 64);
20
21/* draw a checker pattern */
22for ($i = 0; $i < imagesx($im); $i++) {
23    for ($j = 0; $j < imagesy($im); $j++) {
24        imagesetpixel($im, $i, $j, ($i%2 != $j%2 ? $solid : $transparent));
25    }
26}
27
28/* create the destination image */
29$copy = imagecreatetruecolor(5, 5);
30imagealphablending($copy, false);
31imagesavealpha($copy, true);
32imagecopyresampled($copy, $im, 0,0, 0,0, 5,5, 10, 10);
33
34/* assert all pixels have the same color */
35$color = imagecolorat($copy, 3, 3);
36for ($i = 0; $i < imagesx($copy); $i++) {
37    for ($j = 0; $j < imagesy($copy); $j++) {
38        if (imagecolorat($copy, $i, $j) != $color) {
39            echo 'different pixel values', PHP_EOL;
40        }
41    }
42}
43
44/* assign actual component values */
45$red = ($color & 0xFF0000) >> 16;
46$green = ($color & 0x00FF00) >> 8;
47$blue = ($color & 0x0000FF);
48$alpha = ($color & 0x7F000000) >> 24;
49
50/* test for expected component values */
51if (!($red >= EXP_RED - 1 && $red <= EXP_RED + 1)) {
52    printf("red: expected roughly %d, got %d\n", EXP_RED, $red);
53}
54if (!($green >= EXP_GREEN - 1 && $green <= EXP_GREEN + 1)) {
55    printf("green: expected roughly %d, got %d\n", EXP_GREEN, $green);
56}
57if (!($blue >= EXP_BLUE - 1 && $blue <= EXP_BLUE + 1)) {
58    printf("blue: expected roughly %d, got %d\n", EXP_BLUE, $blue);
59}
60if (!($alpha >= EXP_ALPHA - 1 && $alpha <= EXP_ALPHA + 1)) {
61    printf("alpha: expected roughly %d, got %d\n", EXP_ALPHA, $alpha);
62}
63
64imagedestroy($copy);
65imagedestroy($im);
66
67echo 'DONE';
68?>
69--EXPECT--
70DONE
Note: See TracBrowser for help on using the repository browser.