/**
* Draw an image
*
* The image will be inlined in the SVG document using data URL scheme. For
* this the mime type and base64 encoded file content will be merged to
* URL.
*
* @param mixed $file Image file
* @param ezcGraphCoordinate $position Top left position
* @param mixed $width Width of image in destination image
* @param mixed $height Height of image in destination image
* @return void
*/
public function drawImage($file, ezcGraphCoordinate $position, $width, $height)
{
$this->initiliazeSurface();
// Ensure given bitmap is a PNG image
$data = getimagesize($file);
if ($data[2] !== IMAGETYPE_PNG) {
throw new Exception('Cairo only has support for PNGs.');
}
// Create new surface from given bitmap
$imageSurface = CairoImageSurface::createFromPng($file);
// Create pattern from source image to be able to transform it
$pattern = new CairoSurfacePattern($imageSurface);
// Scale pattern to defined dimensions and move it to its destination position
$matrix = CairoMatrix::multiply($move = CairoMatrix::initTranslate(-$position->x, -$position->y), $scale = CairoMatrix::initScale($data[0] / $width, $data[1] / $height));
$pattern->setMatrix($matrix);
// Merge surfaces
$this->context->setSource($pattern);
$this->context->rectangle($position->x, $position->y, $width, $height);
$this->context->fill();
}
