function hex_to_rgb in ImageCache Actions 6

Same name and namespace in other branches

1. 5.3 utility.inc \hex_to_rgb()
2. 5.2 utility.inc \hex_to_rgb()
3. 6.2 utility-color.inc \hex_to_rgb()

Decode an HTML hex-code into an array of R, G, and B values. accepts these formats: (case insensitive) #ffffff, ffffff, #fff, fff

6 calls to hex_to_rgb()

canvasactions_definecanvas_image in ./canvasactions.inc

Implementation of hook_image()

imagecache_alpha_image in ./transparency.inc

Given an image, manipulate the transparancy behaviour.

imagecache_colorshift_image in ./imagecache_coloractions.module

Implementation of hook_image()

imagecache_rgb_form in ./utility.inc

Prepare a subform for displaying RGB fields

png_color2alpha in ./transparency.inc

This achives a tonal effect by converting the images combined tone and existing transparency into one shade value. This is then used as the ALPHA transparency for that pixel, while the whole thing is coloured the same shade. Images…

... See full list

File

./utility.inc, line 137

Utility form, conversion and rendering functions for image processes

Code

function hex_to_rgb($hex) {
  $hex = trim($hex);

  // remove '#'
  if (substr($hex, 0, 1) == '#') {
    $hex = substr($hex, 1);
  }

  // expand short form ('fff') color
  if (strlen($hex) == 3) {
    $hex = substr($hex, 0, 1) . substr($hex, 0, 1) . substr($hex, 1, 1) . substr($hex, 1, 1) . substr($hex, 2, 1) . substr($hex, 2, 1);
  }
  if (strlen($hex) != 6) {
    trigger_error('Error: Invalid color "' . $hex . '"');
  }

  // convert
  $rgb['red'] = hexdec(substr($hex, 0, 2));
  $rgb['green'] = hexdec(substr($hex, 2, 2));
  $rgb['blue'] = hexdec(substr($hex, 4, 2));
  return $rgb;
}