Fixed opaqueBackground and BitmapData texture fillRect

[andresa88]

Fixed opaqueBackground. Also fixed BitmapData's fillRect when backed by a Texture. In both cases, the Context3D clear() clears the entire framebuffer and ignores any scissor setting. We need a new __clear() method that takes into account the supplied scissor rectangle.

Here's an example that shows both glitches.

package;

import openfl.display.Bitmap;
import openfl.geom.Rectangle;
import openfl.display3D.Context3DTextureFormat;
import openfl.display.BitmapData;
import openfl.display.Shape;
import openfl.display.Sprite;

class Main extends Sprite
{
	public function new ()
	{
		super ();

		stage.color = 0;

		test_opaqueBackground();

		#if !flash
		test_texture_fillRect();
		#end
	}

	// Should render a red circle with a green opaque background
	function test_opaqueBackground()
	{
		var shape = new Shape();
		shape.opaqueBackground = 0x00FF00;
		shape.graphics.beginFill(0xFF0000);
		shape.graphics.drawCircle(100, 100, 100);
		shape.graphics.endFill();
		shape.x = 100;
		shape.y = 100;
		addChild(shape);
	}

	// It should render a blue square with a red square in the center
	function test_texture_fillRect()
	{
		var texture = stage.context3D.createRectangleTexture(200, 200, Context3DTextureFormat.BGRA, true);
		var bitmapData = BitmapData.fromTexture(texture);
		bitmapData.fillRect(bitmapData.rect, 0xFF0000FF);
		bitmapData.fillRect(new Rectangle(50, 50, 100, 100), 0xFFFF0000);

		var bitmap = new Bitmap(bitmapData);
		bitmap.x = 400;
		bitmap.y = 100;
		addChild(bitmap);
	}
}