/**
* Returns a cropped image
*
* @param GDImage_Image $img
* @param smart_coordinate $left
* @param smart_coordinate $top
* @param smart_coordinate $width
* @param smart_coordinate $height
* @return GDImage_Image
*/
function execute($img, $left, $top, $width, $height)
{
$width = GDImage_Coordinate::fix($width, $img->getWidth(), $width);
$height = GDImage_Coordinate::fix($height, $img->getHeight(), $height);
$left = GDImage_Coordinate::fix($left, $img->getWidth(), $width);
$top = GDImage_Coordinate::fix($top, $img->getHeight(), $height);
if ($left < 0) {
$width = $left + $width;
$left = 0;
}
if ($width > $img->getWidth() - $left) {
$width = $img->getWidth() - $left;
}
if ($top < 0) {
$height = $top + $height;
$top = 0;
}
if ($height > $img->getHeight() - $top) {
$height = $img->getHeight() - $top;
}
if ($width <= 0 || $height <= 0) {
JError::raiseError(500, JText::_('JLIB_GDIMAGE_ERROR_CAN_NOT_CROP_OUTSIDE'));
return false;
}
$new = $img->doCreate($width, $height);
if ($img->isTransparent() || $img instanceof GDImage_PaletteImage) {
$new->copyTransparencyFrom($img);
imagecopyresized($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height);
} else {
$new->alphaBlending(false);
$new->saveAlpha(true);
imagecopyresampled($new->getHandle(), $img->getHandle(), 0, 0, $left, $top, $width, $height, $width, $height);
}
return $new;
}
/**
* Prepares and corrects smart coordinates
*
* @param GDImage_Image $img
* @param smart_coordinate $width
* @param smart_coordinate $height
* @param string $fit
* @return array
*/
protected function prepareDimensions($img, $width, $height, $fit)
{
list($width, $height) = GDImage_Coordinate::fixForResize($img, $width, $height);
if ($width === 0 || $height === 0) {
return array('width' => 0, 'height' => 0);
}
if ($fit == null) {
$fit = 'inside';
}
$dim = array();
if ($fit == 'fill') {
$dim['width'] = $width;
$dim['height'] = $height;
} elseif ($fit == 'inside' || $fit == 'outside') {
$rx = $img->getWidth() / $width;
$ry = $img->getHeight() / $height;
if ($fit == 'inside') {
$ratio = $rx > $ry ? $rx : $ry;
} else {
$ratio = $rx < $ry ? $rx : $ry;
}
$dim['width'] = round($img->getWidth() / $ratio);
$dim['height'] = round($img->getHeight() / $ratio);
} else {
JError::raiseError(500, JText::sprintf('JLIB_GDIMAGE_ERROR_INVALID_FIT', $fit));
return false;
}
return $dim;
}
/**
* Writes text to the image's canvas
*
* @param GDImage_Image $img
* @param smart_coordinate $left
* @param smart_coordinate $top
* @param string $text
* @param integer $angle
* @return GDImage_Image
*/
function writeText($image, $x, $y, $text, $angle = 0)
{
if ($image->isTrueColor()) {
$image->alphaBlending(true);
}
$box = imageftbbox($this->size, $angle, $this->face, $text);
$obox = array('left' => min($box[0], $box[2], $box[4], $box[6]), 'top' => min($box[1], $box[3], $box[5], $box[7]), 'right' => max($box[0], $box[2], $box[4], $box[6]) - 1, 'bottom' => max($box[1], $box[3], $box[5], $box[7]) - 1);
$obox['width'] = abs($obox['left']) + abs($obox['right']);
$obox['height'] = abs($obox['top']) + abs($obox['bottom']);
$x = GDImage_Coordinate::fix($x, $image->getWidth(), $obox['width']);
$y = GDImage_Coordinate::fix($y, $image->getHeight(), $obox['height']);
$fixed_x = $x - $obox['left'];
$fixed_y = $y - $obox['top'];
imagettftext($image->getHandle(), $this->size, $angle, $fixed_x, $fixed_y, $this->color, $this->face, $text);
}
/**
* Returns a merged image
*
* @param GDImage_Image $base
* @param GDImage_Image $overlay
* @param smart_coordinate $left
* @param smart_coordinate $top
* @param numeric $pct
* @return GDImage_Image
*/
function execute($base, $overlay, $left, $top, $pct)
{
$x = GDImage_Coordinate::fix($left, $base->getWidth(), $overlay->getWidth());
$y = GDImage_Coordinate::fix($top, $base->getHeight(), $overlay->getHeight());
$result = $base->asTrueColor();
$result->alphaBlending(true);
$result->saveAlpha(true);
if ($pct <= 0) {
return $result;
}
if ($pct < 100) {
imagecopymerge($result->getHandle(), $overlay->getHandle(), $x, $y, 0, 0, $overlay->getWidth(), $overlay->getHeight(), $pct);
} else {
imagecopy($result->getHandle(), $overlay->getHandle(), $x, $y, 0, 0, $overlay->getWidth(), $overlay->getHeight());
}
return $result;
}
