function ctools_stylizer_image_processor::command_colorize in Chaos Tool Suite (ctools) 7

Same name and namespace in other branches

1. 6 includes/stylizer.inc \ctools_stylizer_image_processor::command_colorize()

Colorize the current workspace with the given location.

This uses simple color blending to colorize the image.

@todo it is possible that this colorize could allow different methods for determining how to blend colors?

File

includes/stylizer.inc, line 444

Create customized CSS and images from palettes created by user input.

Class

ctools_stylizer_image_processor

Code

function command_colorize($color, $x = NULL, $y = NULL, $width = NULL, $height = NULL) {
  if (!isset($x)) {
    $whole_image = TRUE;
    $x = $y = 0;
    $width = imagesx($this->workspace);
    $height = imagesy($this->workspace);
  }
  $this
    ->log("Colorize: {$color} ({$x}, {$y}, {$width}, {$height})");
  $c = _color_unpack($this->palette[$color]);
  imagealphablending($this->workspace, FALSE);
  imagesavealpha($this->workspace, TRUE);

  // If PHP 5 use the nice imagefilter which is faster.
  if (!empty($whole_image) && version_compare(phpversion(), '5.2.5', '>=') && function_exists('imagefilter')) {
    imagefilter($this->workspace, IMG_FILTER_COLORIZE, $c[0], $c[1], $c[2]);
  }
  else {

    // Otherwise we can do it the brute force way.
    for ($j = 0; $j < $height; $j++) {
      for ($i = 0; $i < $width; $i++) {
        $current = imagecolorsforindex($this->workspace, imagecolorat($this->workspace, $i, $j));
        $new_index = imagecolorallocatealpha($this->workspace, $c[0], $c[1], $c[2], $current['alpha']);
        imagesetpixel($this->workspace, $i, $j, $new_index);
      }
    }
  }
}