reactos/dll/opengl/mesa/src/gallium/auxiliary/draw/draw_pt_post_vs.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 "pipe/p_context.h"
  31 #include "draw/draw_context.h"
  32 #include "draw/draw_private.h"
  33 #include "draw/draw_pt.h"
  34 #include "draw/draw_vs.h"
  35
  36 #define DO_CLIP_XY           0x1
  37 #define DO_CLIP_FULL_Z       0x2
  38 #define DO_CLIP_HALF_Z       0x4
  39 #define DO_CLIP_USER         0x8
  40 #define DO_VIEWPORT          0x10
  41 #define DO_EDGEFLAG          0x20
  42 #define DO_CLIP_XY_GUARD_BAND 0x40
  43
  44
  45 struct pt_post_vs {
  46    struct draw_context *draw;
  47
  48    unsigned flags;
  49
  50    boolean (*run)( struct pt_post_vs *pvs,
  51                    struct draw_vertex_info *info );
  52 };
  53
  54 static INLINE void
  55 initialize_vertex_header(struct vertex_header *header)
  56 {
  57    header->clipmask = 0;
  58    header->edgeflag = 1;
  59    header->have_clipdist = 0;
  60    header->vertex_id = UNDEFINED_VERTEX_ID;
  61 }
  62
  63 static INLINE float
  64 dot4(const float *a, const float *b)
  65 {
  66    return (a[0]*b[0] +
  67            a[1]*b[1] +
  68            a[2]*b[2] +
  69            a[3]*b[3]);
  70 }
  71
  72 #define FLAGS (0)
  73 #define TAG(x) x##_none
  74 #include "draw_cliptest_tmp.h"
  75
  76 #define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_VIEWPORT)
  77 #define TAG(x) x##_xy_fullz_viewport
  78 #include "draw_cliptest_tmp.h"
  79
  80 #define FLAGS (DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT)
  81 #define TAG(x) x##_xy_halfz_viewport
  82 #include "draw_cliptest_tmp.h"
  83
  84 #define FLAGS (DO_CLIP_XY_GUARD_BAND | DO_CLIP_HALF_Z | DO_VIEWPORT)
  85 #define TAG(x) x##_xy_gb_halfz_viewport
  86 #include "draw_cliptest_tmp.h"
  87
  88 #define FLAGS (DO_CLIP_FULL_Z | DO_VIEWPORT)
  89 #define TAG(x) x##_fullz_viewport
  90 #include "draw_cliptest_tmp.h"
  91
  92 #define FLAGS (DO_CLIP_HALF_Z | DO_VIEWPORT)
  93 #define TAG(x) x##_halfz_viewport
  94 #include "draw_cliptest_tmp.h"
  95
  96 #define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT)
  97 #define TAG(x) x##_xy_fullz_user_viewport
  98 #include "draw_cliptest_tmp.h"
  99
 100 #define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT | DO_EDGEFLAG)
 101 #define TAG(x) x##_xy_fullz_user_viewport_edgeflag
 102 #include "draw_cliptest_tmp.h"
 103
 104
 105
 106 /* Don't want to create 64 versions of this function, so catch the
 107  * less common ones here.  This is looking like something which should
 108  * be code-generated, perhaps appended to the end of the vertex
 109  * shader.
 110  */
 111 #define FLAGS (pvs->flags)
 112 #define TAG(x) x##_generic
 113 #include "draw_cliptest_tmp.h"
 114
 115
 116
 117 boolean draw_pt_post_vs_run( struct pt_post_vs *pvs,
 118                              struct draw_vertex_info *info )
 119 {
 120    return pvs->run( pvs, info );
 121 }
 122
 123
 124 void draw_pt_post_vs_prepare( struct pt_post_vs *pvs,
 125                               boolean clip_xy,
 126                               boolean clip_z,
 127                               boolean clip_user,
 128                               boolean guard_band,
 129                               boolean bypass_viewport,
 130                               boolean opengl,
 131                               boolean need_edgeflags )
 132 {
 133    pvs->flags = 0;
 134
 135    /* This combination not currently tested/in use:
 136     */
 137    if (opengl)
 138       guard_band = FALSE;
 139
 140    if (clip_xy && !guard_band) {
 141       pvs->flags |= DO_CLIP_XY;
 142       ASSIGN_4V( pvs->draw->plane[0], -1,  0,  0, 1 );
 143       ASSIGN_4V( pvs->draw->plane[1],  1,  0,  0, 1 );
 144       ASSIGN_4V( pvs->draw->plane[2],  0, -1,  0, 1 );
 145       ASSIGN_4V( pvs->draw->plane[3],  0,  1,  0, 1 );
 146    }
 147    else if (clip_xy && guard_band) {
 148       pvs->flags |= DO_CLIP_XY_GUARD_BAND;
 149       ASSIGN_4V( pvs->draw->plane[0], -0.5,  0,  0, 1 );
 150       ASSIGN_4V( pvs->draw->plane[1],  0.5,  0,  0, 1 );
 151       ASSIGN_4V( pvs->draw->plane[2],  0, -0.5,  0, 1 );
 152       ASSIGN_4V( pvs->draw->plane[3],  0,  0.5,  0, 1 );
 153    }
 154
 155    if (clip_z && opengl) {
 156       pvs->flags |= DO_CLIP_FULL_Z;
 157       ASSIGN_4V( pvs->draw->plane[4],  0,  0,  1, 1 );
 158    }
 159
 160    if (clip_z && !opengl) {
 161       pvs->flags |= DO_CLIP_HALF_Z;
 162       ASSIGN_4V( pvs->draw->plane[4],  0,  0,  1, 0 );
 163    }
 164
 165    if (clip_user)
 166       pvs->flags |= DO_CLIP_USER;
 167
 168    if (!bypass_viewport)
 169       pvs->flags |= DO_VIEWPORT;
 170
 171    if (need_edgeflags)
 172       pvs->flags |= DO_EDGEFLAG;
 173
 174    /* Now select the relevant function:
 175     */
 176    switch (pvs->flags) {
 177    case 0:
 178       pvs->run = do_cliptest_none;
 179       break;
 180
 181    case DO_CLIP_XY | DO_CLIP_FULL_Z | DO_VIEWPORT:
 182       pvs->run = do_cliptest_xy_fullz_viewport;
 183       break;
 184
 185    case DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT:
 186       pvs->run = do_cliptest_xy_halfz_viewport;
 187       break;
 188
 189    case DO_CLIP_XY_GUARD_BAND | DO_CLIP_HALF_Z | DO_VIEWPORT:
 190       pvs->run = do_cliptest_xy_gb_halfz_viewport;
 191       break;
 192
 193    case DO_CLIP_FULL_Z | DO_VIEWPORT:
 194       pvs->run = do_cliptest_fullz_viewport;
 195       break;
 196
 197    case DO_CLIP_HALF_Z | DO_VIEWPORT:
 198       pvs->run = do_cliptest_halfz_viewport;
 199       break;
 200
 201    case DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT:
 202       pvs->run = do_cliptest_xy_fullz_user_viewport;
 203       break;
 204
 205    case (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER |
 206          DO_VIEWPORT | DO_EDGEFLAG):
 207       pvs->run = do_cliptest_xy_fullz_user_viewport_edgeflag;
 208       break;
 209
 210    default:
 211       pvs->run = do_cliptest_generic;
 212       break;
 213    }
 214 }
 215
 216
 217 struct pt_post_vs *draw_pt_post_vs_create( struct draw_context *draw )
 218 {
 219    struct pt_post_vs *pvs = CALLOC_STRUCT( pt_post_vs );
 220    if (!pvs)
 221       return NULL;
 222
 223    pvs->draw = draw;
 224
 225    return pvs;
 226 }
 227
 228 void draw_pt_post_vs_destroy( struct pt_post_vs *pvs )
 229 {
 230    FREE(pvs);
 231 }