1 /* 2 * Mesa 3-D graphics library 3 * Version: 6.5.1 4 * 5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included 15 * in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: 25 * Keith Whitwell <keith (at) tungstengraphics.com> 26 */ 27 28 #if !HAVE_SPEC 29 #define VERT_SET_SPEC( v, c ) 30 #define VERT_COPY_SPEC( v0, v1 ) 31 #define VERT_SAVE_SPEC( idx ) 32 #define VERT_RESTORE_SPEC( idx ) 33 #endif 34 35 static void TAG(unfilled_tri)( struct gl_context *ctx, 36 GLenum mode, 37 GLuint e0, GLuint e1, GLuint e2 ) 38 { 39 struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; 40 GLubyte *ef = VB->EdgeFlag; 41 VERTEX *v[3]; 42 LOCAL_VARS(3); 43 44 v[0] = (VERTEX *)GET_VERTEX(e0); 45 v[1] = (VERTEX *)GET_VERTEX(e1); 46 v[2] = (VERTEX *)GET_VERTEX(e2); 47 48 if (ctx->Light.ShadeModel == GL_FLAT && HAVE_HW_FLATSHADE) { 49 VERT_SAVE_RGBA(0); 50 VERT_SAVE_RGBA(1); 51 VERT_COPY_RGBA(v[0], v[2]); 52 VERT_COPY_RGBA(v[1], v[2]); 53 54 if (HAVE_SPEC) { 55 VERT_SAVE_SPEC(0); 56 VERT_SAVE_SPEC(1); 57 VERT_COPY_SPEC(v[0], v[2]); 58 VERT_COPY_SPEC(v[1], v[2]); 59 } 60 } 61 62 /* fprintf(stderr, "%s %s %d %d %d\n", __FUNCTION__, */ 63 /* _mesa_lookup_enum_by_nr( mode ), */ 64 /* ef[e0], ef[e1], ef[e2]); */ 65 66 if (mode == GL_POINT) { 67 RASTERIZE(GL_POINTS); 68 if (ef[e0]) POINT( v[0] ); 69 if (ef[e1]) POINT( v[1] ); 70 if (ef[e2]) POINT( v[2] ); 71 } 72 else { 73 RASTERIZE(GL_LINES); 74 if (RENDER_PRIMITIVE == GL_POLYGON) { 75 if (ef[e2]) LINE( v[2], v[0] ); 76 if (ef[e0]) LINE( v[0], v[1] ); 77 if (ef[e1]) LINE( v[1], v[2] ); 78 } 79 else { 80 if (ef[e0]) LINE( v[0], v[1] ); 81 if (ef[e1]) LINE( v[1], v[2] ); 82 if (ef[e2]) LINE( v[2], v[0] ); 83 } 84 } 85 86 if (ctx->Light.ShadeModel == GL_FLAT && HAVE_HW_FLATSHADE) { 87 VERT_RESTORE_RGBA(0); 88 VERT_RESTORE_RGBA(1); 89 90 if (HAVE_SPEC) { 91 VERT_RESTORE_SPEC(0); 92 VERT_RESTORE_SPEC(1); 93 } 94 } 95 } 96 97 98 static void TAG(unfilled_quad)( struct gl_context *ctx, 99 GLenum mode, 100 GLuint e0, GLuint e1, 101 GLuint e2, GLuint e3 ) 102 { 103 struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; 104 GLubyte *ef = VB->EdgeFlag; 105 VERTEX *v[4]; 106 LOCAL_VARS(4); 107 108 v[0] = (VERTEX *)GET_VERTEX(e0); 109 v[1] = (VERTEX *)GET_VERTEX(e1); 110 v[2] = (VERTEX *)GET_VERTEX(e2); 111 v[3] = (VERTEX *)GET_VERTEX(e3); 112 113 /* Hardware flatshading breaks down here. If the hardware doesn't 114 * support flatshading, this will already have been done: 115 */ 116 if (ctx->Light.ShadeModel == GL_FLAT && HAVE_HW_FLATSHADE) { 117 VERT_SAVE_RGBA(0); 118 VERT_SAVE_RGBA(1); 119 VERT_SAVE_RGBA(2); 120 VERT_COPY_RGBA(v[0], v[3]); 121 VERT_COPY_RGBA(v[1], v[3]); 122 VERT_COPY_RGBA(v[2], v[3]); 123 124 if (HAVE_SPEC) { 125 VERT_SAVE_SPEC(0); 126 VERT_SAVE_SPEC(1); 127 VERT_SAVE_SPEC(2); 128 VERT_COPY_SPEC(v[0], v[3]); 129 VERT_COPY_SPEC(v[1], v[3]); 130 VERT_COPY_SPEC(v[2], v[3]); 131 } 132 } 133 134 if (mode == GL_POINT) { 135 RASTERIZE(GL_POINTS); 136 if (ef[e0]) POINT( v[0] ); 137 if (ef[e1]) POINT( v[1] ); 138 if (ef[e2]) POINT( v[2] ); 139 if (ef[e3]) POINT( v[3] ); 140 } 141 else { 142 RASTERIZE(GL_LINES); 143 if (ef[e0]) LINE( v[0], v[1] ); 144 if (ef[e1]) LINE( v[1], v[2] ); 145 if (ef[e2]) LINE( v[2], v[3] ); 146 if (ef[e3]) LINE( v[3], v[0] ); 147 } 148 149 if (ctx->Light.ShadeModel == GL_FLAT && HAVE_HW_FLATSHADE) { 150 VERT_RESTORE_RGBA(0); 151 VERT_RESTORE_RGBA(1); 152 VERT_RESTORE_RGBA(2); 153 154 if (HAVE_SPEC) { 155 VERT_RESTORE_SPEC(0); 156 VERT_RESTORE_SPEC(1); 157 VERT_RESTORE_SPEC(2); 158 } 159 } 160 } 161 162 163 #if !HAVE_SPEC 164 #undef VERT_SET_SPEC 165 #undef VERT_COPY_SPEC 166 #undef VERT_SAVE_SPEC 167 #undef VERT_RESTORE_SPEC 168 #endif 169 170 #undef TAG 171
