function _fivestar_color_render in Fivestar 5

Same name and namespace in other branches

1. 6.2 includes/fivestar.color.inc \_fivestar_color_render()
2. 6 fivestar_color.inc \_fivestar_color_render()

Render images that match a given palette.

Parameters

$source: The original image source (star-template.png or cancel-template.png).

$palette: The colors to be used in the generation of this image.

$type: The type of color to be rendered: solid or gradient.

2 calls to _fivestar_color_render()

fivestar_color_form_submit in ./fivestar_color.inc

Submit handler for color change form.

fivestar_preview_color in ./fivestar.module

Callback function for fivestar/preview/color.

File

./fivestar_color.inc, line 237

File containing functions relating to the color widget.

Code

function _fivestar_color_render($source, $palette, $type) {

  // Pull in the template image.
  $template = imagecreatefrompng($source);
  imagealphablending($template, TRUE);
  $width = imagesx($template) / 2;
  $height = imagesy($template);

  // Create a true color mask image from the left side of the template.
  $mask = imagecreatetruecolor($width, $height);
  $transparent = imagecolorallocatealpha($mask, 0, 0, 0, 127);
  imagefill($mask, 0, 0, $transparent);
  imagecopy($mask, $template, 0, 0, 0, 0, $width, $height);

  // Create a true color overlay image from the right side of the template.
  $overlay = imagecreatetruecolor($width, $height);
  $transparent = imagecolorallocatealpha($overlay, 0, 0, 0, 127);
  imagefill($overlay, 0, 0, $transparent);
  imagecopy($overlay, $template, 0, 0, $width, 0, $width, $height);

  // No need for the template image any more.
  imagedestroy($template);

  // Apply the selected colors to the mask.
  $slices = basename($source) == 'star-template.png' ? 3 : 2;
  $slice_height = floor($height / $slices);
  foreach ($slices == 2 ? array(
    'off',
    'hover',
  ) : array(
    'off',
    'on',
    'hover',
  ) as $slice => $key) {
    $slice_y = $slice_height * $slice;
    if ($type == 'gradient') {
      _fivestar_color_mask_linear_gradient($mask, $palette[$key . '1'], $palette[$key . '2'], $palette['matte'], 0, $slice_y, $width, $slice_height);
    }
    else {
      _fivestar_color_mask($mask, $palette[$key . '1'], $palette['matte'], 0, $slice_y, $width, $slice_height);
    }
  }

  // Apply the overlay on top of the mask.
  imagealphablending($mask, TRUE);
  imagecopy($mask, $overlay, 0, 0, 0, 0, $width, $height);
  imagedestroy($overlay);

  // Set the background color.
  if ($palette['matte'] == 'transparent') {

    // A simple case, just make this save as a 24-bit PNG.
    imagesavealpha($mask, TRUE);
    $return = $mask;
  }
  else {

    // If there is a matte, create a new 8-bit image, fill with the matte,
    // apply the star over the top, then set the matte to transparent.
    $return = imagecreatetruecolor($width, $height);
    $matte_rgb = _fivestar_color_unpack($palette['matte']);
    $transparent = imagecolorallocate($return, $matte_rgb[0], $matte_rgb[1], $matte_rgb[2]);
    imagefill($return, 0, 0, $transparent);
    imagealphablending($return, TRUE);
    imagecopy($return, $mask, 0, 0, 0, 0, $width, $height);
    imagecolortransparent($return, $transparent);
    imagetruecolortopalette($return, TRUE, 255);
  }
  return $return;
}