/**
* Draw a polygon
*
* @param awColor $color Polygon color
* @param Polygon A polygon
*/
public function polygon(awColor $color, awPolygon $polygon) {
switch($polygon->getStyle()) {
case awPolygon::SOLID :
$thickness = $line->getThickness();
$this->startThickness($thickness);
$points = $this->getPolygonPoints($polygon);
$rgb = $color->getColor($this->resource);
imagepolygon($this->resource, $points, $polygon->count(), $rgb);
$this->stopThickness($thickness);
break;
default :
if($polygon->count() > 1) {
$prev = $polygon->get(0);
$line = new awLine;
$line->setStyle($polygon->getStyle());
$line->setThickness($polygon->getThickness());
for($i = 1; $i < $polygon->count(); $i++) {
$current = $polygon->get($i);
$line->setLocation($prev, $current);
$this->line($color, $line);
$prev = $current;
}
}
}
}
/**
* When passed a Color object, returns the corresponding
* color identifier (driver dependant).
*
* @param awColor $color A Color object
* @return array $rgba A color identifier representing the color composed of the given RGB components
*/
public function getColor(awColor $color)
{
// Ming simply works with R, G, B and Alpha values.
list($red, $green, $blue, $alpha) = $color->rgba();
// However, the Ming alpha channel ranges from 255 (opaque) to 0 (transparent),
// while the awColor alpha channel ranges from 0 (opaque) to 100 (transparent).
// First, we convert from 0-100 to 0-255.
$alpha = (int) ($alpha * 255 / 100);
// Then from 0-255 to 255-0.
$alpha = abs($alpha - 255);
return array($red, $green, $blue, $alpha);
}
