PHP图片描边字与马赛克(示例)

2. /**
3. * GD image text outer
4. *
5. * @copyright UGiA.CN
6. *
   @LINK
   www.ugia.cn/?p=88
7. * @edit bbs.it-home.org
8. */
9. function imagetextouter(&$im, $size, $x, $y, $color, $fontfile, $text, $outer)
10. {
11. if (!function_exists('ImageColorAllocateHEX'))
12. {
13. function ImageColorAllocateHEX($im, $s)
14. {
15. if($s{0} == "#") $s = substr($s,1);
16. $bg_dec = hexdec($s);
17. return imagecolorallocate($im,
18. ($bg_dec & 0xFF0000) >> 16,
19. ($bg_dec & 0x00FF00) >> 8,
20. ($bg_dec & 0x0000FF)
21. );
22. }
23. }
24. $ttf = false;
25. if (is_file($fontfile))
26. {
27. $ttf = true;
28. $area = imagettfbbox($size, $angle, $fontfile, $text);
29. $width = $area[2] - $area[0] + 2;
30. $height = $area[1] - $area[5] + 2;
31. }
32. else
33. {
34. $width = strlen($text) * 10;
35. $height = 16;
36. }
37. $im_tmp = imagecreate($width, $height);
38. $white = imagecolorallocate($im_tmp, 255, 255, 255);
39. $black = imagecolorallocate($im_tmp, 0, 0, 0);
40. $color = ImageColorAllocateHEX($im, $color);
41. $outer = ImageColorAllocateHEX($im, $outer);
42. if ($ttf)
43. {
44. imagettftext($im_tmp, $size, 0, 0, $height - 2, $black, $fontfile, $text);
45. imagettftext($im, $size, 0, $x, $y, $color, $fontfile, $text);
46. $y = $y - $height + 2;
47. }
48. else
49. {
50. imagestring($im_tmp, $size, 0, 0, $text, $black);
51. imagestring($im, $size, $x, $y, $text, $color);
52. }
53. for ($i = 0; $i < $width; $i ++)
54. {
55. for ($j = 0; $j < $height; $j ++)
56. {
57. $c = ImageColorAt($im_tmp, $i, $j);
58. if ($c !== $white)
59. {
60. ImageColorAt ($im_tmp, $i, $j - 1) != $white || imagesetpixel($im, $x + $i, $y + $j - 1, $outer);
61. ImageColorAt ($im_tmp, $i, $j + 1) != $white || imagesetpixel($im, $x + $i, $y + $j + 1, $outer);
62. ImageColorAt ($im_tmp, $i - 1, $j) != $white || imagesetpixel($im, $x + $i - 1, $y + $j, $outer);
63. ImageColorAt ($im_tmp, $i + 1, $j) != $white || imagesetpixel($im, $x + $i + 1, $y + $j, $outer);
64. // 取消注释，与Fireworks的发光效果相同
65. /*
66. ImageColorAt ($im_tmp, $i - 1, $j - 1) != $white || imagesetpixel($im, $x + $i - 1, $y + $j - 1, $outer);
67. ImageColorAt ($im_tmp, $i + 1, $j - 1) != $white || imagesetpixel($im, $x + $i + 1, $y + $j - 1, $outer);
68. ImageColorAt ($im_tmp, $i - 1, $j + 1) != $white || imagesetpixel($im, $x + $i - 1, $y + $j + 1, $outer);
69. ImageColorAt ($im_tmp, $i + 1, $j + 1) != $white || imagesetpixel($im, $x + $i + 1, $y + $j + 1, $outer);
70. */
71. }
72. }
73. }
74. imagedestroy($im_tmp);
75. }
76. ?>

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2，调用示例：

2. header("Content-type: image/png");
3. $im = imagecreatefromjpeg("bluesky.jpg");
4. $white = imagecolorallocate($im, 255,255,255);
5. imagetextouter($im, 9, 10, 20, '#000000', "simsun.ttc", '新年快乐', '#ffffff');
6. imagetextouter($im, 2, 10, 30, '#FFFF00', "", 'hello, world!' , '#103993');
7. imagepng($im);
8. imagedestroy($im);
9. ?>

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再来说马赛克：void imagemask ( resource image, int x1, int y1, int x2, int y2, int deep) imagemask() 把坐标 x1，y1 到 x2，y2（图像左上角为 0, 0）的矩形区域加上马赛克。 deep为模糊程度，数字越大越模糊。

效果，如下图：

1，马赛克函数代码：

2. /**
3. * GD image mask
4. *
5. * @edit bbs.it-home.org
6. */
7. function imagemask(&$im, $x1, $y1, $x2, $y2, $deep)
8. {
9. for($x = $x1; $x < $x2; $x += $deep)
10. {
11. for ($y = $y1; $y < $y2; $y += $deep)
12. {
13. $color = ImageColorAt ($im, $x + round($deep / 2), $y + round($deep / 2));
14. imagefilledrectangle ($im, $x, $y, $x + $deep, $y + $deep, $color);

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2，调用示例：

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