bugfix

h3d/impl/GlDriver.hx

@@ -779,6 +779,7 @@ class GlDriver extends Driver {
 		#if (js || hl)
 		gl.readPixels(0, 0, pixels.width, pixels.height, GL.RGBA, GL.UNSIGNED_BYTE, @:privateAccess pixels.bytes.b);
 		pixels.format = RGBA;
+		pixels.flags.set(FlipY);
 		#end
 	}