/**
* Returns an image with only specified channels copied
*
* @param WideImage_PaletteImage $img
* @param array $channels
* @return WideImage_PaletteImage
*/
function execute($img, $channels)
{
$blank = array('red' => 0, 'green' => 0, 'blue' => 0);
if (isset($channels['alpha'])) {
unset($channels['alpha']);
}
$width = $img->getWidth();
$height = $img->getHeight();
$copy = WideImage_PaletteImage::create($width, $height);
if ($img->isTransparent()) {
$otci = $img->getTransparentColor();
$TRGB = $img->getColorRGB($otci);
$tci = $copy->allocateColor($TRGB);
} else {
$otci = null;
$tci = null;
}
for ($x = 0; $x < $width; $x++) {
for ($y = 0; $y < $height; $y++) {
$ci = $img->getColorAt($x, $y);
if ($ci === $otci) {
$copy->setColorAt($x, $y, $tci);
continue;
}
$RGB = $img->getColorRGB($ci);
$newRGB = $blank;
foreach ($channels as $channel) {
$newRGB[$channel] = $RGB[$channel];
}
$color = $copy->getExactColor($newRGB);
if ($color == -1) {
$color = $copy->allocateColor($newRGB);
}
$copy->setColorAt($x, $y, $color);
}
}
if ($img->isTransparent()) {
$copy->setTransparentColor($tci);
}
return $copy;
}
/**
* Returns a copy of the image
*
* @param $trueColor True if the new image should be truecolor
* @return WideImage_Image
*/
protected function copyAsNew($trueColor = false)
{
$width = $this->getWidth();
$height = $this->getHeight();
if ($trueColor) {
$new = WideImage_TrueColorImage::create($width, $height);
} else {
$new = WideImage_PaletteImage::create($width, $height);
}
// copy transparency of source to target
if ($this->isTransparent()) {
$rgb = $this->getTransparentColorRGB();
if (is_array($rgb)) {
$tci = $new->allocateColor($rgb['red'], $rgb['green'], $rgb['blue']);
$new->fill(0, 0, $tci);
$new->setTransparentColor($tci);
}
}
imageCopy($new->getHandle(), $this->handle, 0, 0, 0, 0, $width, $height);
return $new;
}
/**
* Factory method for creating a palette image
*
* @param int $width
* @param int $height
* @return WideImage_PaletteImage
*/
static function createPaletteImage($width, $height)
{
return WideImage_PaletteImage::create($width, $height);
}
/**
* Returns a resized image
*
* @param WideImage_Image $img
* @param smart_coordinate $width
* @param smart_coordinate $height
* @param string $fit
* @param string $scale
* @return WideImage_Image
*/
function execute($img, $width, $height, $fit, $scale)
{
$dim = $this->prepareDimensions($img, $width, $height, $fit);
if ($scale === 'down' && ($dim['width'] >= $img->getWidth() && $dim['height'] >= $img->getHeight()) || $scale === 'up' && ($dim['width'] <= $img->getWidth() && $dim['height'] <= $img->getHeight())) {
$dim = array('width' => $img->getWidth(), 'height' => $img->getHeight());
}
if ($dim['width'] <= 0 || $dim['height'] <= 0) {
throw new WideImage_Operation_InvalidResizeDimensionException("Both dimensions must be larger than 0.");
}
if ($img->isTransparent() || $img instanceof WideImage_PaletteImage) {
$new = WideImage_PaletteImage::create($dim['width'], $dim['height']);
$new->copyTransparencyFrom($img);
if (!imagecopyresized($new->getHandle(), $img->getHandle(), 0, 0, 0, 0, $new->getWidth(), $new->getHeight(), $img->getWidth(), $img->getHeight())) {
throw new WideImage_GDFunctionResultException("imagecopyresized() returned false");
}
} else {
$new = WideImage_TrueColorImage::create($dim['width'], $dim['height']);
$new->alphaBlending(false);
$new->saveAlpha(true);
if (!imagecopyresampled($new->getHandle(), $img->getHandle(), 0, 0, 0, 0, $new->getWidth(), $new->getHeight(), $img->getWidth(), $img->getHeight())) {
throw new WideImage_GDFunctionResultException("imagecopyresampled() returned false");
}
$new->alphaBlending(true);
}
return $new;
}