| 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 | #define V1 VARS_XYZW
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| 47 | #define S1 DO_SETUP_XYZW
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| 48 | #define T1 COPY_XYZW_STRIDE
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| 49 | #define Z1 4
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| 50 |
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| 51 | #if (IND & SETUP_RGBA)
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| 52 | #define V2 V1 VARS_RGBA
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| 53 | #define S2 S1 DO_SETUP_RGBA
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| 54 | #define T2 T1 COPY_RGBA_STRIDE
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| 55 | #define Z2 (Z1 + 4)
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| 56 | #else
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| 57 | #define V2 V1
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| 58 | #define S2 S1
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| 59 | #define T2 T1
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| 60 | #define Z2 Z1
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| 61 | #endif
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| 62 |
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| 63 | #if (IND & SETUP_TMU0)
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| 64 | #define V3 V2 VARS_TMU0
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| 65 | #define S3 S2 DO_SETUP_TMU0(Z2)
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| 66 | #define T3 T2 COPY_TMU0_STRIDE(Z2)
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| 67 | #define Z3 (Z2 + 2)
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| 68 | #else
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| 69 | #define V3 V2
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| 70 | #define S3 S2
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| 71 | #define T3 T2
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| 72 | #define Z3 Z2
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| 73 | #endif
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| 74 |
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| 75 | #if (IND & SETUP_TMU1)
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| 76 | #define V4 V3 VARS_TMU1
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| 77 | #define S4 S3 DO_SETUP_TMU1(Z3)
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| 78 | #define T4 T3 COPY_TMU1_STRIDE(Z3)
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| 79 | #define Z4 (Z3 + 2)
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| 80 | #else
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| 81 | #define V4 V3
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| 82 | #define S4 S3
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| 83 | #define T4 T3
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| 84 | #define Z4 Z3
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| 85 | #endif
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| 86 |
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| 87 | #if (Z4 & 2)
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| 88 | #define SIZE (Z4+2)
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| 89 | #define COPY_STRIDE T4 COPY_NIL(Z4)
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| 90 | #else
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| 91 | #define SIZE Z4
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| 92 | #define COPY_STRIDE T4
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| 93 | #endif
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| 94 |
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| 95 | #define VARS V4
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| 96 | #define SETUP S4
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| 97 |
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| 98 | #define DRAW_LINE(tmp0, tmp1, width) \
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| 99 | do { \
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| 100 | GrVertex verts[4]; \
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| 101 | float dx, dy, ix, iy; \
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| 102 | \
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| 103 | dx = tmp0->x - tmp1->x; \
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| 104 | dy = tmp0->y - tmp1->y; \
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| 105 | \
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| 106 | if (dx * dx > dy * dy) { \
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| 107 | iy = width * .5; \
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| 108 | ix = 0; \
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| 109 | } else { \
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| 110 | iy = 0; \
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| 111 | ix = width * .5; \
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| 112 | } \
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| 113 | \
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| 114 | verts[0] = *tmp0; \
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| 115 | verts[1] = *tmp0; \
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| 116 | verts[2] = *tmp1; \
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| 117 | verts[3] = *tmp1; \
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| 118 | \
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| 119 | verts[0].x = tmp0->x - ix; \
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| 120 | verts[0].y = tmp0->y - iy; \
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| 121 | \
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| 122 | verts[1].x = tmp0->x + ix; \
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| 123 | verts[1].y = tmp0->y + iy; \
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| 124 | \
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| 125 | verts[2].x = tmp1->x + ix; \
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| 126 | verts[2].y = tmp1->y + iy; \
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| 127 | \
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| 128 | verts[3].x = tmp1->x - ix; \
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| 129 | verts[3].y = tmp1->y - iy; \
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| 130 | \
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| 131 | FX_grDrawPolygonVertexList(4, verts); \
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| 132 | } while (0)
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| 133 |
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| 134 | static void TAG(fx_tri_view_clip)( struct vertex_buffer *VB,
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| 135 | GLuint v[],
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| 136 | GLubyte mask )
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| 137 | {
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| 138 | GLcontext *ctx = VB->ctx;
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| 139 | fxMesaContext fxMesa = (fxMesaContext)ctx->DriverCtx;
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| 140 | GLfloat data[VB_MAX_CLIPPED_VERTS*12];
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| 141 | GLfloat *vlist[VB_MAX_CLIPPED_VERTS];
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| 142 | GrVertex *verts[VB_MAX_CLIPPED_VERTS];
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| 143 | fxVertex *gWin = FX_DRIVER_DATA(VB)->verts;
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| 144 | GLfloat *out = data;
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| 145 | GLfloat *mat = ctx->Viewport.WindowMap.m;
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| 146 | GLuint i, n;
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| 147 | GLubyte *clipmask = VB->ClipMask;
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| 148 |
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| 149 | GLuint tmu0_source = fxMesa->tmu_source[0];
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| 150 | GLuint tmu1_source = fxMesa->tmu_source[1];
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| 151 | GLvector4f *tc0_vec = VB->TexCoordPtr[tmu0_source];
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| 152 | GLvector4f *tc1_vec = VB->TexCoordPtr[tmu1_source];
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| 153 |
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| 154 | (void) fxMesa;
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| 155 | (void) tmu0_source; (void) tc0_vec;
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| 156 | (void) tmu1_source; (void) tc1_vec;
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| 157 |
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| 158 | for (i = 0 ; i < 3 ; i++) {
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| 159 | GLuint e = v[i];
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| 160 | verts[i] = 0;
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| 161 | if (!clipmask[e]) verts[i] = (GrVertex *)gWin[e].f;
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| 162 | vlist[i] = out;
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| 163 | COPY_STRIDE;
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| 164 | out += SIZE;
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| 165 | }
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| 166 |
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| 167 | if ((n = fx_view_clip_triangle( ctx, vlist, verts, SIZE, mask )) >= 3)
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| 168 | {
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| 169 | GrVertex tmp[VB_MAX_CLIPPED_VERTS];
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| 170 | GrVertex *v = tmp, *v2, *v3;
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| 171 | VARS;
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| 172 |
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| 173 | for (i = 0 ; i < n ; i++)
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| 174 | if (!verts[i]) {
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| 175 | GLfloat *data = vlist[i];
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| 176 | SETUP;
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| 177 | verts[i] = v++;
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| 178 | }
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| 179 |
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| 180 | v = verts[0];
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| 181 | v2 = verts[1];
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| 182 | v3 = verts[2];
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| 183 |
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| 184 | for (i = 2 ; i < n ; v2 = v3, v3=verts[++i])
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| 185 | FX_grDrawTriangle(v, v2, v3);
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| 186 | }
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| 187 | }
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| 188 |
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| 189 |
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| 190 |
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| 191 |
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| 192 |
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| 193 | static void TAG(fx_tri_clip_stride)( struct vertex_buffer *VB,
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| 194 | GLuint v[],
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| 195 | GLuint mask )
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| 196 | {
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| 197 | GLcontext *ctx = VB->ctx;
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| 198 | fxMesaContext fxMesa = (fxMesaContext)ctx->DriverCtx;
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| 199 | GLfloat data[VB_MAX_CLIPPED_VERTS*12];
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| 200 | GLfloat *vlist[VB_MAX_CLIPPED_VERTS];
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| 201 | GrVertex *verts[VB_MAX_CLIPPED_VERTS];
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| 202 | fxVertex *gWin = FX_DRIVER_DATA(VB)->verts;
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| 203 | GLfloat *out = data;
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| 204 | GLfloat *mat = ctx->Viewport.WindowMap.m;
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| 205 | GLuint i, n;
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| 206 | GLubyte *clipmask = VB->ClipMask;
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| 207 |
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| 208 | GLuint tmu0_source = fxMesa->tmu_source[0];
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| 209 | GLuint tmu1_source = fxMesa->tmu_source[1];
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| 210 | GLvector4f *tc0_vec = VB->TexCoordPtr[tmu0_source];
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| 211 | GLvector4f *tc1_vec = VB->TexCoordPtr[tmu1_source];
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| 212 |
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| 213 | (void) fxMesa;
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| 214 | (void) tmu0_source; (void) tc0_vec;
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| 215 | (void) tmu1_source; (void) tc1_vec;
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| 216 |
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| 217 | for (i = 0 ; i < 3 ; i++) {
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| 218 | GLuint e = v[i];
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| 219 | verts[i] = 0;
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| 220 | if (!clipmask[e]) verts[i] = (GrVertex *)gWin[e].f;
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| 221 | vlist[i] = out;
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| 222 | COPY_STRIDE;
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| 223 | out += SIZE;
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| 224 | }
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| 225 |
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| 226 | if (VB->ClipPtr->size < 4) {
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| 227 | vlist[0][3] = vlist[1][3] = vlist[2][3] = 1.0;
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| 228 | if (VB->ClipPtr->size == 2)
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| 229 | vlist[0][2] = vlist[1][2] = vlist[2][2] = 0.0;
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| 230 | }
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| 231 |
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| 232 | if ((n = fx_clip_triangle( ctx, vlist, verts, SIZE, mask )) >= 3)
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| 233 | {
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| 234 | GrVertex tmp[VB_MAX_CLIPPED_VERTS];
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| 235 | GrVertex *v = tmp, *v2, *v3;
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| 236 | VARS;
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| 237 |
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| 238 | for (i = 0 ; i < n ; i++)
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| 239 | if (!verts[i]) {
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| 240 | GLfloat *data = vlist[i];
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| 241 | SETUP;
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| 242 | verts[i] = v++;
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| 243 | }
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| 244 |
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| 245 | v = verts[0];
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| 246 | v2 = verts[1];
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| 247 | v3 = verts[2];
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| 248 |
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| 249 | for (i = 2 ; i < n ; v2 = v3, v3=verts[++i])
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| 250 | FX_grDrawTriangle(v, v2, v3);
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| 251 | }
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| 252 | }
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| 253 |
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| 254 |
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| 255 |
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| 256 | static void TAG(fx_line_clip)( struct vertex_buffer *VB,
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| 257 | GLuint v1, GLuint v2,
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| 258 | GLubyte mask )
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| 259 | {
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| 260 | GLcontext *ctx = VB->ctx;
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| 261 | fxMesaContext fxMesa = (fxMesaContext)ctx->DriverCtx;
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| 262 | GLfloat data[VB_MAX_CLIPPED_VERTS*12];
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| 263 | GLfloat *vlist[VB_MAX_CLIPPED_VERTS];
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| 264 | GLfloat *out = data;
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| 265 | GLfloat *mat = ctx->Viewport.WindowMap.m;
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| 266 | GLfloat w = ctx->Line.Width*.5;
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| 267 | GLuint e, n;
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| 268 |
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| 269 | GLuint tmu0_source = fxMesa->tmu_source[0];
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| 270 | GLuint tmu1_source = fxMesa->tmu_source[1];
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| 271 | GLvector4f *tc0_vec = VB->TexCoordPtr[tmu0_source];
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| 272 | GLvector4f *tc1_vec = VB->TexCoordPtr[tmu1_source];
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| 273 |
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| 274 | VARS;
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| 275 |
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| 276 | (void) fxMesa;
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| 277 | (void) tmu0_source; (void) tc0_vec;
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| 278 | (void) tmu1_source; (void) tc1_vec;
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| 279 |
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| 280 | vlist[0] = out;
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| 281 | e = v1;
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| 282 | COPY_STRIDE;
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| 283 | out += SIZE;
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| 284 |
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| 285 | vlist[1] = out;
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| 286 | e = v2;
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| 287 | COPY_STRIDE;
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| 288 | out += SIZE;
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| 289 |
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| 290 | if (VB->ClipPtr->size < 4) {
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| 291 | vlist[0][3] = vlist[1][3] = 1.0;
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| 292 | if (VB->ClipPtr->size == 2)
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| 293 | vlist[0][2] = vlist[1][2] = 0.0;
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| 294 | }
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| 295 |
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| 296 | if ((n = fx_clip_line( ctx, vlist, SIZE, mask )) != 0)
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| 297 | {
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| 298 | GrVertex gWin[2];
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| 299 | GrVertex *v;
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| 300 | GLfloat *data;
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| 301 |
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| 302 | v = gWin;
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| 303 | data = vlist[0];
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| 304 | SETUP;
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| 305 |
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| 306 | v++;
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| 307 | data = vlist[1];
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| 308 | SETUP;
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| 309 |
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| 310 | DRAW_LINE(gWin, v, w);
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| 311 | }
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| 312 | }
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| 313 |
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| 314 |
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| 315 |
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| 316 | #undef V1
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| 317 | #undef S1
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| 318 | #undef C1
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| 319 | #undef Z1
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| 320 | #undef T1
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| 321 |
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| 322 | #undef V2
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| 323 | #undef S2
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| 324 | #undef C2
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| 325 | #undef Z2
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| 326 | #undef T2
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| 327 |
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| 328 | #undef V3
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| 329 | #undef S3
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| 330 | #undef C3
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| 331 | #undef Z3
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| 332 | #undef T3
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| 333 |
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| 334 | #undef V4
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| 335 | #undef S4
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| 336 | #undef C4
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| 337 | #undef Z4
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| 338 | #undef T4
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| 339 |
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| 340 | #undef VARS
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| 341 | #undef SETUP
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| 342 | #undef COPY
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| 343 | #undef COPY_STRIDE
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| 344 | #undef SIZE
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| 345 | #undef IND
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| 346 | #undef TAG
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