public function draw($resource, $x, $y)
{
if (!$this->_color) {
$this->_color = Rgb::createBlack();
}
imagettftext($resource, $this->_size, $this->_angle, $x, $y, imagecolorallocatealpha($resource, $this->_color->getRed(), $this->_color->getGreen(), $this->_color->getBlue(), $this->_color->getAlpha()), $this->_font, $this->_text);
return $this;
}
public function filter($resource)
{
if (!is_resource($resource) || 'gd' !== get_resource_type($resource)) {
throw new \Exception('Resource must be given');
}
$width = imagesx($resource);
$height = imagesy($resource);
$greyscaleImageResource = imagecreatetruecolor($width, $height);
// prepare greyscale palette
for ($c = 0; $c < 256; $c++) {
$palette[$c] = imagecolorallocate($greyscaleImageResource, $c, $c, $c);
}
// set pixels
for ($y = 0; $y < $height; $y++) {
for ($x = 0; $x < $width; $x++) {
$rgb = imagecolorat($resource, $x, $y);
$grey = Yiq::getYFromRgbArray(Rgb::fromIntAsArray($rgb));
imagesetpixel($greyscaleImageResource, $x, $y, $palette[$grey]);
}
}
return $greyscaleImageResource;
}
public function testCrop()
{
$image = $this->_factory->openImage(__DIR__ . '/test.png');
$image->crop(10, 10, 10, 10);
$this->assertEquals(10, imagesx($image->getResource()));
$this->assertEquals(10, imagesy($image->getResource()));
$this->assertEquals(array(0, 0, 255, 0), Rgb::fromInt(imagecolorat($image->getResource(), 5, 5))->toArray());
}
/**
*
* @param type $angle
* @param array $backgroundColor
*/
public function rotate($angle, $backgroundColor = null)
{
$backgroundColor = $backgroundColor ? Rgb::normalize($backgroundColor) : new Rgb(0, 0, 0, 127);
// create color
$backgroundColorId = imageColorAllocateAlpha($this->_resource, $backgroundColor->getRed(), $backgroundColor->getGreen(), $backgroundColor->getBlue(), $backgroundColor->getAlpha());
// rotate image
$rotatedImageResource = imagerotate($this->_resource, $angle, $backgroundColorId, true);
imagealphablending($rotatedImageResource, false);
imagesavealpha($rotatedImageResource, true);
$this->loadResource($rotatedImageResource);
return $this;
}
