/*
 * Copyright © 2006 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Wang Zhenyu <zhenyu.z.wang@intel.com>
 *    Keith Packard <keithp@keithp.com>
 */
 
/*
 * Register assignments:
 *
 *  x		    g6/g7
 *  y		    g8/g9
 *
 *  temp x	    g10/g11
 *  temp y	    g12/g13
 *
 *  src w	    g14/g15
 *  src u	    m1/m2
 *  src v	    m3/m4
 */
 
/* Fragment to compute per-pixel XY values */

include(`exa_wm.g4i')
    
    /* Load X and Y coordinates and compute per-pixel coordinates */
add (16)	temp_x_uw<1>UW	dst_x_uw		0x10101010V	{ align1 };
add (16)	temp_y_uw<1>UW	dst_y_uw		0x11001100V	{ align1 };

    /* subtract screen-space origin of vertex 0 */
add (16)	dst_x<1>F	temp_x_uw<8,8,1>UW	-screen_x0	{ compr align1 };
add (16)	dst_y<1>F	temp_y_uw<8,8,1>UW	-screen_y0	{ compr align1 };