/**
* Draw thumbnail result to resource.
*
* @return bool|PEAR_Error TRUE on success or PEAR_Error on failure.
* @access public
*/
function render()
{
if (!Image_Tools::isGDImageResource($this->resultImage)) {
return PEAR::raiseError('Invalid image resource');
}
// Estimate a rectangular portion of the source image and a size of the target image
if ($this->options['method'] == IMAGE_TOOLS_THUMBNAIL_METHOD_CROP) {
if ($this->options['percent']) {
$W = floor($this->options['percent'] / 100 * $this->imageInfo['width']);
$H = floor($this->options['percent'] / 100 * $this->imageInfo['height']);
} else {
$W = $this->options['width'];
$H = $this->options['height'];
}
$width = $W;
$height = $H;
$Y = $this->_coord('valign', 'height', $H);
$X = $this->_coord('halign', 'width', $W);
} else {
$W = $this->imageInfo['width'];
$H = $this->imageInfo['height'];
$X = 0;
$Y = 0;
if ($this->options['percent']) {
$width = floor($this->options['percent'] / 100 * $W);
$height = floor($this->options['percent'] / 100 * $H);
} else {
$width = $this->options['width'];
$height = $this->options['height'];
if ($this->options['method'] == IMAGE_TOOLS_THUMBNAIL_METHOD_SCALE_MIN) {
$Ww = $W / $width;
$Hh = $H / $height;
if ($Ww > $Hh) {
$W = floor($width * $Hh);
$X = $this->_coord('halign', 'width', $W);
} else {
$H = floor($height * $Ww);
$Y = $this->_coord('valign', 'height', $H);
}
} else {
if ($H > $W) {
$width = floor($height / $H * $W);
} else {
$height = floor($width / $W * $H);
}
}
}
}
// Create the target image
if (function_exists('imagecreatetruecolor')) {
$target = imagecreatetruecolor($width, $height);
} else {
$target = imagecreate($width, $height);
}
if (!Image_Tools::isGDImageResource($target)) {
return PEAR::raiseError('Cannot initialize new GD image stream');
}
// enable transparency if supported
if (Image_Tools_Utils::compareGDVersion('2.0.28', '>=')) {
// imagealphablending() and imagesavealpha() requires GD 2.0.38
imagealphablending($target, false);
imagesavealpha($target, true);
}
// Copy the source image to the target image
if ($this->options['method'] == IMAGE_TOOLS_THUMBNAIL_METHOD_CROP) {
$result = imagecopy($target, $this->resultImage, 0, 0, $X, $Y, $W, $H);
} elseif (function_exists('imagecopyresampled')) {
$result = imagecopyresampled($target, $this->resultImage, 0, 0, $X, $Y, $width, $height, $W, $H);
} else {
$result = imagecopyresized($target, $this->resultImage, 0, 0, $X, $Y, $width, $height, $W, $H);
}
if (!$result) {
return PEAR::raiseError('Cannot resize image');
}
// Free a memory from the source image and save the resulting thumbnail
imagedestroy($this->resultImage);
$this->resultImage = $target;
return true;
}
