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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 143 | giacomo | 1 | /* $Id: ss_triangle.c,v 1.1 2003-04-29 12:46:51 giacomo Exp $ */ |
| 2 | |||
| 3 | /* |
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| 4 | * Mesa 3-D graphics library |
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| 5 | * Version: 3.5 |
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| 6 | * |
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| 7 | * Copyright (C) 1999-2001 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 | * Authors: |
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| 27 | * Keith Whitwell <keith@tungstengraphics.com> |
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| 28 | */ |
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| 29 | |||
| 30 | #include "glheader.h" |
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| 31 | #include "colormac.h" |
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| 32 | #include "macros.h" |
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| 33 | #include "mtypes.h" |
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| 34 | |||
| 35 | #include "tnl/t_context.h" |
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| 36 | |||
| 37 | #include "ss_triangle.h" |
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| 38 | #include "ss_context.h" |
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| 39 | |||
| 40 | #define SS_RGBA_BIT 0x1 |
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| 41 | #define SS_OFFSET_BIT 0x2 |
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| 42 | #define SS_TWOSIDE_BIT 0x4 |
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| 43 | #define SS_UNFILLED_BIT 0x8 |
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| 44 | #define SS_MAX_TRIFUNC 0x10 |
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| 45 | |||
| 46 | static triangle_func tri_tab[SS_MAX_TRIFUNC]; |
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| 47 | static quad_func quad_tab[SS_MAX_TRIFUNC]; |
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| 48 | |||
| 49 | |||
| 50 | static void _swsetup_render_line_tri( GLcontext *ctx, |
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| 51 | GLuint e0, GLuint e1, GLuint e2, |
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| 52 | GLuint facing ) |
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| 53 | { |
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| 54 | SScontext *swsetup = SWSETUP_CONTEXT(ctx); |
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| 55 | struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; |
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| 56 | GLubyte *ef = VB->EdgeFlag; |
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| 57 | SWvertex *verts = swsetup->verts; |
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| 58 | SWvertex *v0 = &verts[e0]; |
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| 59 | SWvertex *v1 = &verts[e1]; |
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| 60 | SWvertex *v2 = &verts[e2]; |
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| 61 | GLchan c[2][4]; |
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| 62 | GLchan s[2][4]; |
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| 63 | GLuint i[2]; |
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| 64 | |||
| 65 | /* cull testing */ |
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| 66 | if (ctx->Polygon.CullFlag) { |
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| 67 | if (facing == 1 && ctx->Polygon.CullFaceMode != GL_FRONT) |
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| 68 | return; |
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| 69 | if (facing == 0 && ctx->Polygon.CullFaceMode != GL_BACK) |
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| 70 | return; |
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| 71 | } |
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| 72 | |||
| 73 | if (ctx->_TriangleCaps & DD_FLATSHADE) { |
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| 74 | COPY_CHAN4(c[0], v0->color); |
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| 75 | COPY_CHAN4(c[1], v1->color); |
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| 76 | COPY_CHAN4(s[0], v0->specular); |
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| 77 | COPY_CHAN4(s[1], v1->specular); |
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| 78 | i[0] = v0->index; |
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| 79 | i[1] = v1->index; |
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| 80 | |||
| 81 | COPY_CHAN4(v0->color, v2->color); |
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| 82 | COPY_CHAN4(v1->color, v2->color); |
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| 83 | COPY_CHAN4(v0->specular, v2->specular); |
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| 84 | COPY_CHAN4(v1->specular, v2->specular); |
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| 85 | v0->index = v2->index; |
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| 86 | v1->index = v2->index; |
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| 87 | } |
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| 88 | |||
| 89 | if (swsetup->render_prim == GL_POLYGON) { |
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| 90 | if (ef[e2]) _swrast_Line( ctx, v2, v0 ); |
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| 91 | if (ef[e0]) _swrast_Line( ctx, v0, v1 ); |
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| 92 | if (ef[e1]) _swrast_Line( ctx, v1, v2 ); |
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| 93 | } else { |
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| 94 | if (ef[e0]) _swrast_Line( ctx, v0, v1 ); |
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| 95 | if (ef[e1]) _swrast_Line( ctx, v1, v2 ); |
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| 96 | if (ef[e2]) _swrast_Line( ctx, v2, v0 ); |
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| 97 | } |
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| 98 | |||
| 99 | if (ctx->_TriangleCaps & DD_FLATSHADE) { |
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| 100 | COPY_CHAN4(v0->color, c[0]); |
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| 101 | COPY_CHAN4(v1->color, c[1]); |
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| 102 | COPY_CHAN4(v0->specular, s[0]); |
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| 103 | COPY_CHAN4(v1->specular, s[1]); |
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| 104 | v0->index = i[0]; |
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| 105 | v1->index = i[1]; |
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| 106 | } |
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| 107 | } |
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| 108 | |||
| 109 | static void _swsetup_render_point_tri( GLcontext *ctx, |
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| 110 | GLuint e0, GLuint e1, GLuint e2, |
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| 111 | GLuint facing ) |
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| 112 | { |
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| 113 | SScontext *swsetup = SWSETUP_CONTEXT(ctx); |
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| 114 | struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; |
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| 115 | GLubyte *ef = VB->EdgeFlag; |
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| 116 | SWvertex *verts = swsetup->verts; |
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| 117 | SWvertex *v0 = &verts[e0]; |
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| 118 | SWvertex *v1 = &verts[e1]; |
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| 119 | SWvertex *v2 = &verts[e2]; |
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| 120 | GLchan c[2][4]; |
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| 121 | GLchan s[2][4]; |
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| 122 | GLuint i[2]; |
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| 123 | |||
| 124 | /* cull testing */ |
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| 125 | if (ctx->Polygon.CullFlag) { |
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| 126 | if (facing == 1 && ctx->Polygon.CullFaceMode != GL_FRONT) |
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| 127 | return; |
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| 128 | if (facing == 0 && ctx->Polygon.CullFaceMode != GL_BACK) |
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| 129 | return; |
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| 130 | } |
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| 131 | |||
| 132 | if (ctx->_TriangleCaps & DD_FLATSHADE) { |
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| 133 | COPY_CHAN4(c[0], v0->color); |
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| 134 | COPY_CHAN4(c[1], v1->color); |
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| 135 | COPY_CHAN4(s[0], v0->specular); |
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| 136 | COPY_CHAN4(s[1], v1->specular); |
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| 137 | i[0] = v0->index; |
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| 138 | i[1] = v1->index; |
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| 139 | |||
| 140 | COPY_CHAN4(v0->color, v2->color); |
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| 141 | COPY_CHAN4(v1->color, v2->color); |
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| 142 | COPY_CHAN4(v0->specular, v2->specular); |
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| 143 | COPY_CHAN4(v1->specular, v2->specular); |
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| 144 | v0->index = v2->index; |
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| 145 | v1->index = v2->index; |
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| 146 | } |
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| 147 | |||
| 148 | if (ef[e0]) _swrast_Point( ctx, v0 ); |
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| 149 | if (ef[e1]) _swrast_Point( ctx, v1 ); |
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| 150 | if (ef[e2]) _swrast_Point( ctx, v2 ); |
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| 151 | |||
| 152 | if (ctx->_TriangleCaps & DD_FLATSHADE) { |
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| 153 | COPY_CHAN4(v0->color, c[0]); |
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| 154 | COPY_CHAN4(v1->color, c[1]); |
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| 155 | COPY_CHAN4(v0->specular, s[0]); |
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| 156 | COPY_CHAN4(v1->specular, s[1]); |
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| 157 | v0->index = i[0]; |
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| 158 | v1->index = i[1]; |
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| 159 | } |
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| 160 | _swrast_flush(ctx); |
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| 161 | } |
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| 162 | |||
| 163 | #define SS_COLOR(a,b) COPY_CHAN4(a,b) |
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| 164 | #define SS_SPEC(a,b) COPY_3V(a,b) |
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| 165 | #define SS_IND(a,b) (a = b) |
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| 166 | |||
| 167 | #define IND (0) |
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| 168 | #define TAG(x) x |
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| 169 | #include "ss_tritmp.h" |
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| 170 | |||
| 171 | #define IND (SS_OFFSET_BIT) |
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| 172 | #define TAG(x) x##_offset |
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| 173 | #include "ss_tritmp.h" |
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| 174 | |||
| 175 | #define IND (SS_TWOSIDE_BIT) |
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| 176 | #define TAG(x) x##_twoside |
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| 177 | #include "ss_tritmp.h" |
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| 178 | |||
| 179 | #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT) |
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| 180 | #define TAG(x) x##_offset_twoside |
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| 181 | #include "ss_tritmp.h" |
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| 182 | |||
| 183 | #define IND (SS_UNFILLED_BIT) |
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| 184 | #define TAG(x) x##_unfilled |
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| 185 | #include "ss_tritmp.h" |
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| 186 | |||
| 187 | #define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT) |
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| 188 | #define TAG(x) x##_offset_unfilled |
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| 189 | #include "ss_tritmp.h" |
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| 190 | |||
| 191 | #define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT) |
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| 192 | #define TAG(x) x##_twoside_unfilled |
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| 193 | #include "ss_tritmp.h" |
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| 194 | |||
| 195 | #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT) |
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| 196 | #define TAG(x) x##_offset_twoside_unfilled |
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| 197 | #include "ss_tritmp.h" |
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| 198 | |||
| 199 | #define IND (0|SS_RGBA_BIT) |
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| 200 | #define TAG(x) x##_rgba |
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| 201 | #include "ss_tritmp.h" |
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| 202 | |||
| 203 | #define IND (SS_OFFSET_BIT|SS_RGBA_BIT) |
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| 204 | #define TAG(x) x##_offset_rgba |
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| 205 | #include "ss_tritmp.h" |
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| 206 | |||
| 207 | #define IND (SS_TWOSIDE_BIT|SS_RGBA_BIT) |
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| 208 | #define TAG(x) x##_twoside_rgba |
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| 209 | #include "ss_tritmp.h" |
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| 210 | |||
| 211 | #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_RGBA_BIT) |
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| 212 | #define TAG(x) x##_offset_twoside_rgba |
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| 213 | #include "ss_tritmp.h" |
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| 214 | |||
| 215 | #define IND (SS_UNFILLED_BIT|SS_RGBA_BIT) |
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| 216 | #define TAG(x) x##_unfilled_rgba |
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| 217 | #include "ss_tritmp.h" |
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| 218 | |||
| 219 | #define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT) |
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| 220 | #define TAG(x) x##_offset_unfilled_rgba |
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| 221 | #include "ss_tritmp.h" |
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| 222 | |||
| 223 | #define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT) |
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| 224 | #define TAG(x) x##_twoside_unfilled_rgba |
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| 225 | #include "ss_tritmp.h" |
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| 226 | |||
| 227 | #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT) |
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| 228 | #define TAG(x) x##_offset_twoside_unfilled_rgba |
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| 229 | #include "ss_tritmp.h" |
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| 230 | |||
| 231 | |||
| 232 | void _swsetup_trifuncs_init( GLcontext *ctx ) |
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| 233 | { |
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| 234 | (void) ctx; |
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| 235 | |||
| 236 | init(); |
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| 237 | init_offset(); |
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| 238 | init_twoside(); |
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| 239 | init_offset_twoside(); |
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| 240 | init_unfilled(); |
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| 241 | init_offset_unfilled(); |
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| 242 | init_twoside_unfilled(); |
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| 243 | init_offset_twoside_unfilled(); |
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| 244 | |||
| 245 | init_rgba(); |
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| 246 | init_offset_rgba(); |
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| 247 | init_twoside_rgba(); |
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| 248 | init_offset_twoside_rgba(); |
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| 249 | init_unfilled_rgba(); |
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| 250 | init_offset_unfilled_rgba(); |
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| 251 | init_twoside_unfilled_rgba(); |
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| 252 | init_offset_twoside_unfilled_rgba(); |
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| 253 | } |
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| 254 | |||
| 255 | |||
| 256 | static void swsetup_points( GLcontext *ctx, GLuint first, GLuint last ) |
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| 257 | { |
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| 258 | struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; |
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| 259 | SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts; |
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| 260 | GLuint i; |
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| 261 | |||
| 262 | if (VB->Elts) { |
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| 263 | for (i = first; i < last; i++) |
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| 264 | if (VB->ClipMask[VB->Elts[i]] == 0) |
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| 265 | _swrast_Point( ctx, &verts[VB->Elts[i]] ); |
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| 266 | } |
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| 267 | else { |
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| 268 | for (i = first; i < last; i++) |
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| 269 | if (VB->ClipMask[i] == 0) |
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| 270 | _swrast_Point( ctx, &verts[i] ); |
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| 271 | } |
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| 272 | } |
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| 273 | |||
| 274 | static void swsetup_line( GLcontext *ctx, GLuint v0, GLuint v1 ) |
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| 275 | { |
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| 276 | SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts; |
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| 277 | _swrast_Line( ctx, &verts[v0], &verts[v1] ); |
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| 278 | } |
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| 279 | |||
| 280 | |||
| 281 | |||
| 282 | void _swsetup_choose_trifuncs( GLcontext *ctx ) |
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| 283 | { |
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| 284 | TNLcontext *tnl = TNL_CONTEXT(ctx); |
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| 285 | GLuint ind = 0; |
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| 286 | |||
| 287 | if (ctx->Polygon.OffsetPoint || |
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| 288 | ctx->Polygon.OffsetLine || |
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| 289 | ctx->Polygon.OffsetFill) |
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| 290 | ind |= SS_OFFSET_BIT; |
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| 291 | |||
| 292 | if (ctx->Light.Enabled && ctx->Light.Model.TwoSide) |
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| 293 | ind |= SS_TWOSIDE_BIT; |
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| 294 | |||
| 295 | /* We piggyback the two-sided stencil front/back determination on the |
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| 296 | * unfilled triangle path. |
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| 297 | */ |
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| 298 | if ((ctx->_TriangleCaps & DD_TRI_UNFILLED) || |
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| 299 | (ctx->Stencil.Enabled && ctx->Stencil.TestTwoSide)) |
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| 300 | ind |= SS_UNFILLED_BIT; |
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| 301 | |||
| 302 | if (ctx->Visual.rgbMode) |
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| 303 | ind |= SS_RGBA_BIT; |
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| 304 | |||
| 305 | tnl->Driver.Render.Triangle = tri_tab[ind]; |
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| 306 | tnl->Driver.Render.Quad = quad_tab[ind]; |
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| 307 | tnl->Driver.Render.Line = swsetup_line; |
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| 308 | tnl->Driver.Render.Points = swsetup_points; |
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| 309 | |||
| 310 | ctx->_Facing = 0; |
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| 311 | } |