PHP图片描边字与马赛克(示例)

2019年10月3日14:29:50
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  1. /**
  2. * GD image text outer
  3. *
  4. * @copyright UGiA.CN
  5. *
    www.ugia.cn/?p=88
  6. * @edit bbs.it-home.org
  7. */
  8. function imagetextouter(&$im, $size, $x, $y, $color, $fontfile, $text, $outer)
  9. {
  10. if (!function_exists('ImageColorAllocateHEX'))
  11. {
  12. function ImageColorAllocateHEX($im, $s)
  13. {
  14. if($s{0} == "#") $s = substr($s,1);
  15. $bg_dec = hexdec($s);
  16. return imagecolorallocate($im,
  17. ($bg_dec & 0xFF0000) >> 16,
  18. ($bg_dec & 0x00FF00) >> 8,
  19. ($bg_dec & 0x0000FF)
  20. );
  21. }
  22. }
  23. $ttf = false;
  24. if (is_file($fontfile))
  25. {
  26. $ttf = true;
  27. $area = imagettfbbox($size, $angle, $fontfile, $text);
  28. $width = $area[2] - $area[0] + 2;
  29. $height = $area[1] - $area[5] + 2;
  30. }
  31. else
  32. {
  33. $width = strlen($text) * 10;
  34. $height = 16;
  35. }
  36. $im_tmp = imagecreate($width, $height);
  37. $white = imagecolorallocate($im_tmp, 255, 255, 255);
  38. $black = imagecolorallocate($im_tmp, 0, 0, 0);
  39. $color = ImageColorAllocateHEX($im, $color);
  40. $outer = ImageColorAllocateHEX($im, $outer);
  41. if ($ttf)
  42. {
  43. imagettftext($im_tmp, $size, 0, 0, $height - 2, $black, $fontfile, $text);
  44. imagettftext($im, $size, 0, $x, $y, $color, $fontfile, $text);
  45. $y = $y - $height + 2;
  46. }
  47. else
  48. {
  49. imagestring($im_tmp, $size, 0, 0, $text, $black);
  50. imagestring($im, $size, $x, $y, $text, $color);
  51. }
  52. for ($i = 0; $i < $width; $i ++)
  53. {
  54. for ($j = 0; $j < $height; $j ++)
  55. {
  56. $c = ImageColorAt($im_tmp, $i, $j);
  57. if ($c !== $white)
  58. {
  59. ImageColorAt ($im_tmp, $i, $j - 1) != $white || imagesetpixel($im, $x + $i, $y + $j - 1, $outer);
  60. ImageColorAt ($im_tmp, $i, $j + 1) != $white || imagesetpixel($im, $x + $i, $y + $j + 1, $outer);
  61. ImageColorAt ($im_tmp, $i - 1, $j) != $white || imagesetpixel($im, $x + $i - 1, $y + $j, $outer);
  62. ImageColorAt ($im_tmp, $i + 1, $j) != $white || imagesetpixel($im, $x + $i + 1, $y + $j, $outer);
  63. // 取消注释,与Fireworks的发光效果相同
  64. /*
  65. ImageColorAt ($im_tmp, $i - 1, $j - 1) != $white || imagesetpixel($im, $x + $i - 1, $y + $j - 1, $outer);
  66. ImageColorAt ($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, $outer);
  69. */
  70. }
  71. }
  72. }
  73. imagedestroy($im_tmp);
  74. }
  75. ?>

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2,调用示例:

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

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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:

  1. /**
  2. * GD image mask
  3. *
  4. * @edit bbs.it-home.org
  5. */
  6. function imagemask(&$im, $x1, $y1, $x2, $y2, $deep)
  7. {
  8. for($x = $x1; $x < $x2; $x += $deep)
  9. {
  10. for ($y = $y1; $y < $y2; $y += $deep)
  11. {
  12. $color = ImageColorAt ($im, $x + round($deep / 2), $y + round($deep / 2));
  13. imagefilledrectangle ($im, $x, $y, $x + $deep, $y + $deep, $color);

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2,调用示例:

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