| 1 | /* -*- mode: C; tab-width:8; c-basic-offset:2 -*- */
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| 2 |
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| 3 | /*
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| 4 | * Mesa 3-D graphics library
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| 5 | * Version: 3.3
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| 6 | *
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| 7 | * Copyright (C) 1999 Brian Paul All Rights Reserved.
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| 8 | *
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| 9 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 10 | * copy of this software and associated documentation files (the "Software"),
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| 11 | * to deal in the Software without restriction, including without limitation
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| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 13 | * and/or sell copies of the Software, and to permit persons to whom the
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| 14 | * Software is furnished to do so, subject to the following conditions:
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| 15 | *
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| 16 | * The above copyright notice and this permission notice shall be included
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| 17 | * in all copies or substantial portions of the Software.
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| 18 | *
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| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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| 20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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| 22 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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| 23 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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| 24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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| 25 | *
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| 26 | *
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| 27 | * Original Mesa / 3Dfx device driver (C) 1999 David Bucciarelli, by the
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| 28 | * terms stated above.
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| 29 | *
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| 30 | * Thank you for your contribution, David!
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| 31 | *
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| 32 | * Please make note of the above copyright/license statement. If you
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| 33 | * contributed code or bug fixes to this code under the previous (GNU
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| 34 | * Library) license and object to the new license, your code will be
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| 35 | * removed at your request. Please see the Mesa docs/COPYRIGHT file
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| 36 | * for more information.
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| 37 | *
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| 38 | * Additional Mesa/3Dfx driver developers:
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| 39 | * Daryll Strauss <daryll@precisioninsight.com>
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| 40 | * Keith Whitwell <keith@precisioninsight.com>
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| 41 | *
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| 42 | * See fxapi.h for more revision/author details.
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| 43 | */
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| 44 |
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| 45 |
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| 46 | #ifdef HAVE_CONFIG_H
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| 47 | #include "conf.h"
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| 48 | #endif
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| 49 |
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| 50 |
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| 51 |
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| 52 | #if defined(FX)
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| 53 | #include "fxdrv.h"
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| 54 |
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| 55 | /* I have found this quite useful in tracking down transformation &
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| 56 | * clipping bugs. If you get a random graphics card freeze, running
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| 57 | * your triangles through this will probably catch the problem.
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| 58 | */
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| 59 |
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| 60 | #define WID 640
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| 61 | #define HI 480
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| 62 |
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| 63 | #undef grDrawTriangle
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| 64 |
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| 65 | void fx_sanity_triangle( GrVertex *v1, GrVertex *v2, GrVertex *v3 )
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| 66 | {
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| 67 | GLuint rv = 1, print = 0;
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| 68 |
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| 69 | GLfloat area = ((v1->x - v3->x) * (v2->y - v3->y) -
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| 70 | (v1->y - v3->y) * (v2->x - v3->x));
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| 71 |
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| 72 | if (v1->x < 0 || v1->y < 0 || v1->x > WID || v1->y > HI ||
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| 73 | v2->x < 0 || v2->y < 0 || v2->x > WID || v2->y > HI ||
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| 74 | v3->x < 0 || v3->y < 0 || v3->x > WID || v3->y > HI)
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| 75 | {
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| 76 | fprintf(stderr,"not clipped/set up!!!!!\n");
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| 77 | rv = 0;
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| 78 | print = 1;
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| 79 | }
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| 80 |
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| 81 | if (area > (WID*HI)) {
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| 82 | fprintf(stderr,"too big\n");
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| 83 | rv = 0;
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| 84 | }
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| 85 | if (v1->oow == 0 || v2->oow == 0 || v3->oow == 0) {
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| 86 | fprintf(stderr,"zero oow\n");
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| 87 | rv = 0;
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| 88 | }
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| 89 | if (0 && area == 0) {
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| 90 | fprintf(stderr,"zero area %p %p %p\n", v1,v2,v3);
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| 91 | rv =0;
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| 92 | }
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| 93 |
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| 94 | if (print) {
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| 95 | fprintf(stderr,"v1: %f %f %f %f col %.0f %.0f %.0f %.0f t0 %f %f %f t1 %f %f %f\n",
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| 96 | v1->x, v1->y, v1->ooz, v1->oow,
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| 97 | v1->r, v1->g, v1->b, v1->a,
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| 98 | v1->tmuvtx[0].sow, v1->tmuvtx[0].tow, v1->tmuvtx[0].oow,
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| 99 | v1->tmuvtx[1].sow, v1->tmuvtx[1].tow, v1->tmuvtx[1].oow);
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| 100 | fprintf(stderr,"v2: %f %f %f %f col %.0f %.0f %.0f %.0f t0 %f %f %f t1 %f %f %f\n",
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| 101 | v2->x, v2->y, v2->ooz, v2->oow,
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| 102 | v2->r, v2->g, v2->b, v2->a,
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| 103 | v2->tmuvtx[0].sow, v2->tmuvtx[0].tow, v2->tmuvtx[0].oow,
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| 104 | v2->tmuvtx[1].sow, v2->tmuvtx[1].tow, v2->tmuvtx[1].oow);
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| 105 | fprintf(stderr,"v3: %f %f %f %f col %.0f %.0f %.0f %.0f t0 %f %f %f t1 %f %f %f\n",
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| 106 | v3->x, v3->y, v3->ooz, v3->oow,
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| 107 | v3->r, v3->g, v3->b, v3->a,
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| 108 | v3->tmuvtx[0].sow, v3->tmuvtx[0].tow, v3->tmuvtx[0].oow,
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| 109 | v3->tmuvtx[1].sow, v3->tmuvtx[1].tow, v3->tmuvtx[1].oow);
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| 110 | }
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| 111 |
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| 112 | if (1)
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| 113 | FX_grDrawTriangle(v1,v2,v3);
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| 114 | else
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| 115 | fprintf(stderr, "\n\n\n");
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| 116 | }
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| 117 |
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| 118 | #else
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| 119 |
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| 120 | void gl_fxsanity_dummy()
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| 121 | {
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| 122 | }
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| 123 |
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| 124 | #endif
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