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/* -*- mode: C; tab-width:8; c-basic-offset:2 -*- */
/*
* Mesa 3-D graphics library
* Version: 3.1
*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
*
* 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 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
* BRIAN PAUL 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.
*
*
* Original Mesa / 3Dfx device driver (C) 1999 David Bucciarelli, by the
* terms stated above.
*
* Thank you for your contribution, David!
*
* Please make note of the above copyright/license statement. If you
* contributed code or bug fixes to this code under the previous (GNU
* Library) license and object to the new license, your code will be
* removed at your request. Please see the Mesa docs/COPYRIGHT file
* for more information.
*
* Additional Mesa/3Dfx driver developers:
* Daryll Strauss <daryll@precisioninsight.com>
* Keith Whitwell <keith@precisioninsight.com>
*
* See fxapi.h for more revision/author details.
*/
#ifdef HAVE_CONFIG_H
#include "conf.h"
#endif
#if defined(FX)
#include "fxdrv.h"
/* I have found this quite useful in tracking down transformation &
* clipping bugs. If you get a random graphics card freeze, running
* your triangles through this will probably catch the problem.
*/
#define WID 640
#define HI 480
#undef grDrawTriangle
void fx_sanity_triangle( GrVertex *v1, GrVertex *v2, GrVertex *v3 )
{
GLuint rv = 1, print = 0;
GLfloat area = ((v1->x - v3->x) * (v2->y - v3->y) -
(v1->y - v3->y) * (v2->x - v3->x));
if (v1->x < 0 || v1->y < 0 || v1->x > WID || v1->y > HI ||
v2->x < 0 || v2->y < 0 || v2->x > WID || v2->y > HI ||
v3->x < 0 || v3->y < 0 || v3->x > WID || v3->y > HI)
{
fprintf(stderr,"not clipped/set up!!!!!\n");
rv = 0;
print = 1;
}
if (area > (WID*HI)) {
fprintf(stderr,"too big\n");
rv = 0;
}
if (v1->oow == 0 || v2->oow == 0 || v3->oow == 0) {
fprintf(stderr,"zero oow\n");
rv = 0;
}
if (0 && area == 0) {
fprintf(stderr,"zero area %p %p %p\n", v1,v2,v3);
rv =0;
}
if (print) {
fprintf(stderr,"v1: %f %f %f %f col %.0f %.0f %.0f %.0f t0 %f %f %f t1 %f %f %f\n",
v1->x, v1->y, v1->ooz, v1->oow,
v1->r, v1->g, v1->b, v1->a,
v1->tmuvtx[0].sow, v1->tmuvtx[0].tow, v1->tmuvtx[0].oow,
v1->tmuvtx[1].sow, v1->tmuvtx[1].tow, v1->tmuvtx[1].oow);
fprintf(stderr,"v2: %f %f %f %f col %.0f %.0f %.0f %.0f t0 %f %f %f t1 %f %f %f\n",
v2->x, v2->y, v2->ooz, v2->oow,
v2->r, v2->g, v2->b, v2->a,
v2->tmuvtx[0].sow, v2->tmuvtx[0].tow, v2->tmuvtx[0].oow,
v2->tmuvtx[1].sow, v2->tmuvtx[1].tow, v2->tmuvtx[1].oow);
fprintf(stderr,"v3: %f %f %f %f col %.0f %.0f %.0f %.0f t0 %f %f %f t1 %f %f %f\n",
v3->x, v3->y, v3->ooz, v3->oow,
v3->r, v3->g, v3->b, v3->a,
v3->tmuvtx[0].sow, v3->tmuvtx[0].tow, v3->tmuvtx[0].oow,
v3->tmuvtx[1].sow, v3->tmuvtx[1].tow, v3->tmuvtx[1].oow);
}
if (1)
FX_grDrawTriangle(v1,v2,v3);
else
fprintf(stderr, "\n\n\n");
}
#else
void gl_fxsanity_dummy()
{
}
#endif
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