src/gallium/auxiliary/draw/draw_pt_varray.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 "pipe/p_util.h"
  29 #include "draw/draw_context.h"
  30 #include "draw/draw_private.h"
  31 #include "draw/draw_pt.h"
  32
  33 #define FETCH_MAX 256
  34 #define DRAW_MAX (16*FETCH_MAX)
  35
  36 struct varray_frontend {
  37    struct draw_pt_front_end base;
  38    struct draw_context *draw;
  39
  40    ushort draw_elts[DRAW_MAX];
  41    unsigned fetch_elts[FETCH_MAX];
  42
  43    unsigned draw_count;
  44    unsigned fetch_count;
  45
  46    struct draw_pt_middle_end *middle;
  47
  48    unsigned input_prim;
  49    unsigned output_prim;
  50 };
  51
  52 static void varray_flush(struct varray_frontend *varray)
  53 {
  54    if (varray->draw_count) {
  55 #if 0
  56       debug_printf("FLUSH fc = %d, dc = %d\n",
  57                    varray->fetch_count,
  58                    varray->draw_count);
  59 #endif
  60       varray->middle->run(varray->middle,
  61                           varray->fetch_elts,
  62                           varray->fetch_count,
  63                           varray->draw_elts,
  64                           varray->draw_count);
  65    }
  66
  67    varray->fetch_count = 0;
  68    varray->draw_count = 0;
  69 }
  70
  71 #if 0
  72 static void varray_check_flush(struct varray_frontend *varray)
  73 {
  74    if (varray->draw_count + 6 >= DRAW_MAX/* ||
  75        varray->fetch_count + 4 >= FETCH_MAX*/) {
  76       varray_flush(varray);
  77    }
  78 }
  79 #endif
  80
  81 static INLINE void add_draw_el(struct varray_frontend *varray,
  82                                int idx, ushort flags)
  83 {
  84    varray->draw_elts[varray->draw_count++] = idx | flags;
  85 }
  86
  87
  88 static INLINE void varray_triangle( struct varray_frontend *varray,
  89                                     unsigned i0,
  90                                     unsigned i1,
  91                                     unsigned i2 )
  92 {
  93    add_draw_el(varray, i0, 0);
  94    add_draw_el(varray, i1, 0);
  95    add_draw_el(varray, i2, 0);
  96 }
  97
  98 static INLINE void varray_triangle_flags( struct varray_frontend *varray,
  99                                           ushort flags,
 100                                           unsigned i0,
 101                                           unsigned i1,
 102                                           unsigned i2 )
 103 {
 104    add_draw_el(varray, i0, flags);
 105    add_draw_el(varray, i1, 0);
 106    add_draw_el(varray, i2, 0);
 107 }
 108
 109 static INLINE void varray_line( struct varray_frontend *varray,
 110                                 unsigned i0,
 111                                 unsigned i1 )
 112 {
 113    add_draw_el(varray, i0, 0);
 114    add_draw_el(varray, i1, 0);
 115 }
 116
 117
 118 static INLINE void varray_line_flags( struct varray_frontend *varray,
 119                                       ushort flags,
 120                                       unsigned i0,
 121                                       unsigned i1 )
 122 {
 123    add_draw_el(varray, i0, flags);
 124    add_draw_el(varray, i1, 0);
 125 }
 126
 127
 128 static INLINE void varray_point( struct varray_frontend *varray,
 129                                  unsigned i0 )
 130 {
 131    add_draw_el(varray, i0, 0);
 132 }
 133
 134 static INLINE void varray_quad( struct varray_frontend *varray,
 135                                 unsigned i0,
 136                                 unsigned i1,
 137                                 unsigned i2,
 138                                 unsigned i3 )
 139 {
 140    varray_triangle( varray, i0, i1, i3 );
 141    varray_triangle( varray, i1, i2, i3 );
 142 }
 143
 144 static INLINE void varray_ef_quad( struct varray_frontend *varray,
 145                                    unsigned i0,
 146                                    unsigned i1,
 147                                    unsigned i2,
 148                                    unsigned i3 )
 149 {
 150    const unsigned omitEdge1 = DRAW_PIPE_EDGE_FLAG_0 | DRAW_PIPE_EDGE_FLAG_2;
 151    const unsigned omitEdge2 = DRAW_PIPE_EDGE_FLAG_0 | DRAW_PIPE_EDGE_FLAG_1;
 152
 153    varray_triangle_flags( varray,
 154                           DRAW_PIPE_RESET_STIPPLE | omitEdge1,
 155                           i0, i1, i3 );
 156
 157    varray_triangle_flags( varray,
 158                           omitEdge2,
 159                           i1, i2, i3 );
 160 }
 161
 162 /* At least for now, we're back to using a template include file for
 163  * this.  The two paths aren't too different though - it may be
 164  * possible to reunify them.
 165  */
 166 #define TRIANGLE(vc,flags,i0,i1,i2) varray_triangle_flags(vc,flags,i0,i1,i2)
 167 #define QUAD(vc,i0,i1,i2,i3)        varray_ef_quad(vc,i0,i1,i2,i3)
 168 #define LINE(vc,flags,i0,i1)        varray_line_flags(vc,flags,i0,i1)
 169 #define POINT(vc,i0)                varray_point(vc,i0)
 170 #define FUNC varray_run_extras
 171 #include "draw_pt_varray_tmp.h"
 172
 173 #define TRIANGLE(vc,flags,i0,i1,i2) varray_triangle(vc,i0,i1,i2)
 174 #define QUAD(vc,i0,i1,i2,i3)        varray_quad(vc,i0,i1,i2,i3)
 175 #define LINE(vc,flags,i0,i1)        varray_line(vc,i0,i1)
 176 #define POINT(vc,i0)                varray_point(vc,i0)
 177 #define FUNC varray_run
 178 #include "draw_pt_varray_tmp.h"
 179
 180
 181
 182 static unsigned reduced_prim[PIPE_PRIM_POLYGON + 1] = {
 183    PIPE_PRIM_POINTS,
 184    PIPE_PRIM_LINES,
 185    PIPE_PRIM_LINES,
 186    PIPE_PRIM_LINES,
 187    PIPE_PRIM_TRIANGLES,
 188    PIPE_PRIM_TRIANGLES,
 189    PIPE_PRIM_TRIANGLES,
 190    PIPE_PRIM_TRIANGLES,
 191    PIPE_PRIM_TRIANGLES,
 192    PIPE_PRIM_TRIANGLES
 193 };
 194
 195
 196
 197 static void varray_prepare(struct draw_pt_front_end *frontend,
 198                            unsigned prim,
 199                            struct draw_pt_middle_end *middle,
 200                            unsigned opt)
 201 {
 202    struct varray_frontend *varray = (struct varray_frontend *)frontend;
 203
 204    if (opt & PT_PIPELINE)
 205    {
 206       varray->base.run = varray_run_extras;
 207    }
 208    else
 209    {
 210       varray->base.run = varray_run;
 211    }
 212
 213    varray->input_prim = prim;
 214    varray->output_prim = reduced_prim[prim];
 215
 216    varray->middle = middle;
 217    middle->prepare(middle, varray->output_prim, opt);
 218 }
 219
 220
 221
 222
 223 static void varray_finish(struct draw_pt_front_end *frontend)
 224 {
 225    struct varray_frontend *varray = (struct varray_frontend *)frontend;
 226    varray->middle->finish(varray->middle);
 227    varray->middle = NULL;
 228 }
 229
 230 static void varray_destroy(struct draw_pt_front_end *frontend)
 231 {
 232    FREE(frontend);
 233 }
 234
 235
 236 struct draw_pt_front_end *draw_pt_varray(struct draw_context *draw)
 237 {
 238    struct varray_frontend *varray = CALLOC_STRUCT(varray_frontend);
 239    if (varray == NULL)
 240       return NULL;
 241
 242    varray->base.prepare = varray_prepare;
 243    varray->base.run     = NULL;
 244    varray->base.finish  = varray_finish;
 245    varray->base.destroy = varray_destroy;
 246    varray->draw = draw;
 247
 248    return &varray->base;
 249 }