1 /************************************************************************** 2 * 3 * Copyright 2008 VMware, Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 #include "util/u_memory.h" 29 #include "util/u_math.h" 30 #include "util/u_prim.h" 31 #include "pipe/p_context.h" 32 #include "draw/draw_context.h" 33 #include "draw/draw_private.h" 34 #include "draw/draw_pt.h" 35 #include "draw/draw_vs.h" 36 37 #define DO_CLIP_XY 0x1 38 #define DO_CLIP_FULL_Z 0x2 39 #define DO_CLIP_HALF_Z 0x4 40 #define DO_CLIP_USER 0x8 41 #define DO_VIEWPORT 0x10 42 #define DO_EDGEFLAG 0x20 43 #define DO_CLIP_XY_GUARD_BAND 0x40 44 45 46 struct pt_post_vs { 47 struct draw_context *draw; 48 49 unsigned flags; 50 51 boolean (*run)( struct pt_post_vs *pvs, 52 struct draw_vertex_info *info, 53 const struct draw_prim_info *prim_info ); 54 }; 55 56 static inline void 57 initialize_vertex_header(struct vertex_header *header) 58 { 59 header->clipmask = 0; 60 header->edgeflag = 1; 61 header->pad = 0; 62 header->vertex_id = UNDEFINED_VERTEX_ID; 63 } 64 65 static inline float 66 dot4(const float *a, const float *b) 67 { 68 return (a[0]*b[0] + 69 a[1]*b[1] + 70 a[2]*b[2] + 71 a[3]*b[3]); 72 } 73 74 #define FLAGS (0) 75 #define TAG(x) x##_none 76 #include "draw_cliptest_tmp.h" 77 78 #define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_VIEWPORT) 79 #define TAG(x) x##_xy_fullz_viewport 80 #include "draw_cliptest_tmp.h" 81 82 #define FLAGS (DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT) 83 #define TAG(x) x##_xy_halfz_viewport 84 #include "draw_cliptest_tmp.h" 85 86 #define FLAGS (DO_CLIP_XY_GUARD_BAND | DO_CLIP_HALF_Z | DO_VIEWPORT) 87 #define TAG(x) x##_xy_gb_halfz_viewport 88 #include "draw_cliptest_tmp.h" 89 90 #define FLAGS (DO_CLIP_FULL_Z | DO_VIEWPORT) 91 #define TAG(x) x##_fullz_viewport 92 #include "draw_cliptest_tmp.h" 93 94 #define FLAGS (DO_CLIP_HALF_Z | DO_VIEWPORT) 95 #define TAG(x) x##_halfz_viewport 96 #include "draw_cliptest_tmp.h" 97 98 #define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT) 99 #define TAG(x) x##_xy_fullz_user_viewport 100 #include "draw_cliptest_tmp.h" 101 102 #define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT | DO_EDGEFLAG) 103 #define TAG(x) x##_xy_fullz_user_viewport_edgeflag 104 #include "draw_cliptest_tmp.h" 105 106 107 108 /* Don't want to create 64 versions of this function, so catch the 109 * less common ones here. This is looking like something which should 110 * be code-generated, perhaps appended to the end of the vertex 111 * shader. 112 */ 113 #define FLAGS (pvs->flags) 114 #define TAG(x) x##_generic 115 #include "draw_cliptest_tmp.h" 116 117 118 119 boolean draw_pt_post_vs_run( struct pt_post_vs *pvs, 120 struct draw_vertex_info *info, 121 const struct draw_prim_info *prim_info ) 122 { 123 return pvs->run( pvs, info, prim_info ); 124 } 125 126 127 void draw_pt_post_vs_prepare( struct pt_post_vs *pvs, 128 boolean clip_xy, 129 boolean clip_z, 130 boolean clip_user, 131 boolean guard_band, 132 boolean bypass_viewport, 133 boolean clip_halfz, 134 boolean need_edgeflags ) 135 { 136 pvs->flags = 0; 137 138 /* This combination not currently tested/in use: 139 */ 140 if (!clip_halfz) 141 guard_band = FALSE; 142 143 if (clip_xy && !guard_band) { 144 pvs->flags |= DO_CLIP_XY; 145 ASSIGN_4V( pvs->draw->plane[0], -1, 0, 0, 1 ); 146 ASSIGN_4V( pvs->draw->plane[1], 1, 0, 0, 1 ); 147 ASSIGN_4V( pvs->draw->plane[2], 0, -1, 0, 1 ); 148 ASSIGN_4V( pvs->draw->plane[3], 0, 1, 0, 1 ); 149 } 150 else if (clip_xy && guard_band) { 151 pvs->flags |= DO_CLIP_XY_GUARD_BAND; 152 ASSIGN_4V( pvs->draw->plane[0], -0.5, 0, 0, 1 ); 153 ASSIGN_4V( pvs->draw->plane[1], 0.5, 0, 0, 1 ); 154 ASSIGN_4V( pvs->draw->plane[2], 0, -0.5, 0, 1 ); 155 ASSIGN_4V( pvs->draw->plane[3], 0, 0.5, 0, 1 ); 156 } 157 158 if (clip_z) { 159 if (clip_halfz) { 160 pvs->flags |= DO_CLIP_HALF_Z; 161 ASSIGN_4V( pvs->draw->plane[4], 0, 0, 1, 0 ); 162 } else { 163 pvs->flags |= DO_CLIP_FULL_Z; 164 ASSIGN_4V( pvs->draw->plane[4], 0, 0, 1, 1 ); 165 } 166 } 167 168 if (clip_user) 169 pvs->flags |= DO_CLIP_USER; 170 171 if (!bypass_viewport) 172 pvs->flags |= DO_VIEWPORT; 173 174 if (need_edgeflags) 175 pvs->flags |= DO_EDGEFLAG; 176 177 /* Now select the relevant function: 178 */ 179 switch (pvs->flags) { 180 case 0: 181 pvs->run = do_cliptest_none; 182 break; 183 184 case DO_CLIP_XY | DO_CLIP_FULL_Z | DO_VIEWPORT: 185 pvs->run = do_cliptest_xy_fullz_viewport; 186 break; 187 188 case DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT: 189 pvs->run = do_cliptest_xy_halfz_viewport; 190 break; 191 192 case DO_CLIP_XY_GUARD_BAND | DO_CLIP_HALF_Z | DO_VIEWPORT: 193 pvs->run = do_cliptest_xy_gb_halfz_viewport; 194 break; 195 196 case DO_CLIP_FULL_Z | DO_VIEWPORT: 197 pvs->run = do_cliptest_fullz_viewport; 198 break; 199 200 case DO_CLIP_HALF_Z | DO_VIEWPORT: 201 pvs->run = do_cliptest_halfz_viewport; 202 break; 203 204 case DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT: 205 pvs->run = do_cliptest_xy_fullz_user_viewport; 206 break; 207 208 case (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | 209 DO_VIEWPORT | DO_EDGEFLAG): 210 pvs->run = do_cliptest_xy_fullz_user_viewport_edgeflag; 211 break; 212 213 default: 214 pvs->run = do_cliptest_generic; 215 break; 216 } 217 } 218 219 220 struct pt_post_vs *draw_pt_post_vs_create( struct draw_context *draw ) 221 { 222 struct pt_post_vs *pvs = CALLOC_STRUCT( pt_post_vs ); 223 if (!pvs) 224 return NULL; 225 226 pvs->draw = draw; 227 228 return pvs; 229 } 230 231 void draw_pt_post_vs_destroy( struct pt_post_vs *pvs ) 232 { 233 FREE(pvs); 234 } 235
