AGAL学习笔记(二)

关于 AGAL 中Texture的Mip映射的函数:

1. public function uploadTextureWithMipmaps($dest:Texture, $BitmapData):void{

2. var $ws:int = $src.width;

3. var $hs:int = $src.height;

4. var $level:int = 0;

5. var $tmp:BitmapData;

6. var $transform:Matrix = new Matrix();

7. var $tmp2:BitmapData;$tmp = new BitmapData( $src.width, $src.height, true, 0x00000000);

8. while ( $ws >= 1 && $hs >= 1 ){

9. $tmp.draw($src, transform, null, null, null, true);

10. $dest.uploadFromBitmapData($tmp, $level);

11. transform.scale(0.5, 0.5);

12. $level += 1;

13. $ws >>= 1;

14. $hs >>= 1;

15. if ($hs && $ws) {

16. $tmp.dispose();

17. $tmp = new BitmapData($ws, $hs, true, 0x00000000);

18. }

19. }

20. $tmp.dispose();

21. }