Hello, strk
> Suppose in a displayList we have 2 layer masks:
> mask1: at depth 1 masks up to layer 3
> mask2: at depth 2 (masked by mask1) masks up to layer 5
> maskee: at depth 4
> Is maskee masked by both mask1 and mask2 or only by mask2 ?
yes, the maskee should be masked by both mask1 and mask2. I am pretty
sure about this, otherwise the stack based algorithm won't work.
I'v tested the above case, see attached Ming source(only for visual check).
--zou
/*
* Copyright (C) 2005, 2006 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/*
* Zou Lunkai, [EMAIL PROTECTED]
*
* Test for nested masks
*/
#include <stdlib.h>
#include <stdio.h>
#include <ming.h>
#include "ming_utils.h"
#define OUTPUT_VERSION 6
#define OUTPUT_FILENAME "masks_test3.swf"
SWFMovieClip defineMovieclip(int x, int y, int w, int h);
SWFMovieClip defineMovieclip(int x, int y, int w, int h)
{
SWFMovieClip mc;
SWFShape sh;
mc = newSWFMovieClip();
sh = make_fill_square (x, y, w, h, 255, 0, 0, 255, 0, 0);
SWFMovieClip_add(mc, (SWFBlock)sh);
SWFMovieClip_nextFrame(mc);
return mc;
}
int
main(int argc, char** argv)
{
SWFMovie mo;
SWFMovieClip mc1, mc2, mc3, mc4, mc5, mc6, mc7, dejagnuclip;
SWFDisplayItem it;
Ming_init();
mo = newSWFMovieWithVersion(OUTPUT_VERSION);
SWFMovie_setDimension(mo, 800, 600);
SWFMovie_setRate (mo, 1.0);
mc1 = defineMovieclip(0, 0, 30, 30);
mc2 = defineMovieclip(0, 0, 60, 60);
mc3 = defineMovieclip(0, 0, 90, 90);
it = SWFMovie_add(mo, (SWFBlock)mc1);
SWFDisplayItem_setDepth(it, 1);
SWFDisplayItem_setMaskLevel(it, 3);
it = SWFMovie_add(mo, (SWFBlock)mc2);
SWFDisplayItem_setDepth(it, 2);
SWFDisplayItem_setMaskLevel(it, 5);
it = SWFMovie_add(mo, (SWFBlock)mc3);
SWFDisplayItem_setDepth(it, 4);
SWFMovie_nextFrame(mo);
//Output movie
puts("Saving " OUTPUT_FILENAME );
SWFMovie_save(mo, OUTPUT_FILENAME);
return 0;
}
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