src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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_vbuf.h"
  31 #include "draw/draw_vertex.h"
  32 #include "draw/draw_pt.h"
  33 #include "draw/draw_vs.h"
  34 #include "translate/translate.h"
  35
  36
  37 struct fetch_pipeline_middle_end {
  38    struct draw_pt_middle_end base;
  39    struct draw_context *draw;
  40
  41    struct pt_emit *emit;
  42    struct pt_fetch *fetch;
  43    struct pt_post_vs *post_vs;
  44
  45    unsigned vertex_data_offset;
  46    unsigned vertex_size;
  47    unsigned prim;
  48    unsigned opt;
  49 };
  50
  51
  52 static void fetch_pipeline_prepare( struct draw_pt_middle_end *middle,
  53                                     unsigned prim,
  54                                     unsigned opt )
  55 {
  56    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
  57    struct draw_context *draw = fpme->draw;
  58    struct draw_vertex_shader *vs = draw->vertex_shader;
  59
  60    /* Add one to num_outputs because the pipeline occasionally tags on
  61     * an additional texcoord, eg for AA lines.
  62     */
  63    unsigned nr = MAX2( vs->info.num_inputs,
  64                        vs->info.num_outputs + 1 );
  65
  66    fpme->prim = prim;
  67    fpme->opt = opt;
  68
  69    /* Always leave room for the vertex header whether we need it or
  70     * not.  It's hard to get rid of it in particular because of the
  71     * viewport code in draw_pt_post_vs.c.
  72     */
  73    fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
  74
  75
  76
  77    draw_pt_fetch_prepare( fpme->fetch,
  78                           fpme->vertex_size );
  79
  80    /* XXX: it's not really gl rasterization rules we care about here,
  81     * but gl vs dx9 clip spaces.
  82     */
  83    draw_pt_post_vs_prepare( fpme->post_vs,
  84                             draw->bypass_clipping,
  85                             draw->identity_viewport,
  86                             draw->rasterizer->gl_rasterization_rules );
  87
  88
  89    if (!(opt & PT_PIPELINE))
  90       draw_pt_emit_prepare( fpme->emit,
  91                             prim );
  92
  93    /* No need to prepare the shader.
  94     */
  95    vs->prepare(vs, draw);
  96
  97 }
  98
  99
 100
 101
 102 static void fetch_pipeline_run( struct draw_pt_middle_end *middle,
 103                                 const unsigned *fetch_elts,
 104                                 unsigned fetch_count,
 105                                 const ushort *draw_elts,
 106                                 unsigned draw_count )
 107 {
 108    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 109    struct draw_context *draw = fpme->draw;
 110    struct draw_vertex_shader *shader = draw->vertex_shader;
 111    unsigned opt = fpme->opt;
 112    unsigned alloc_count = align_int( fetch_count, 4 );
 113
 114    struct vertex_header *pipeline_verts =
 115       (struct vertex_header *)MALLOC(fpme->vertex_size * alloc_count);
 116
 117    if (!pipeline_verts) {
 118       /* Not much we can do here - just skip the rendering.
 119        */
 120       assert(0);
 121       return;
 122    }
 123
 124    /* Fetch into our vertex buffer
 125     */
 126    draw_pt_fetch_run( fpme->fetch,
 127                       fetch_elts,
 128                       fetch_count,
 129                       (char *)pipeline_verts );
 130
 131    /* Run the shader, note that this overwrites the data[] parts of
 132     * the pipeline verts.  If there is no shader, ie a bypass shader,
 133     * then the inputs == outputs, and are already in the correct
 134     * place.
 135     */
 136    if (opt & PT_SHADE)
 137    {
 138       shader->run_linear(shader,
 139                          (const float (*)[4])pipeline_verts->data,
 140                          (      float (*)[4])pipeline_verts->data,
 141                          (const float (*)[4])draw->pt.user.constants,
 142                          fetch_count,
 143                          fpme->vertex_size,
 144                          fpme->vertex_size);
 145    }
 146
 147    if (draw_pt_post_vs_run( fpme->post_vs,
 148                             pipeline_verts,
 149                             fetch_count,
 150                             fpme->vertex_size ))
 151    {
 152       opt |= PT_PIPELINE;
 153    }
 154
 155    /* Do we need to run the pipeline?
 156     */
 157    if (opt & PT_PIPELINE) {
 158       draw_pipeline_run( fpme->draw,
 159                          fpme->prim,
 160                          pipeline_verts,
 161                          fetch_count,
 162                          fpme->vertex_size,
 163                          draw_elts,
 164                          draw_count );
 165    }
 166    else {
 167       draw_pt_emit( fpme->emit,
 168                     (const float (*)[4])pipeline_verts->data,
 169                     fetch_count,
 170                     fpme->vertex_size,
 171                     draw_elts,
 172                     draw_count );
 173    }
 174
 175
 176    FREE(pipeline_verts);
 177 }
 178
 179
 180
 181 static void fetch_pipeline_finish( struct draw_pt_middle_end *middle )
 182 {
 183    /* nothing to do */
 184 }
 185
 186 static void fetch_pipeline_destroy( struct draw_pt_middle_end *middle )
 187 {
 188    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 189
 190    if (fpme->fetch)
 191       draw_pt_fetch_destroy( fpme->fetch );
 192
 193    if (fpme->emit)
 194       draw_pt_emit_destroy( fpme->emit );
 195
 196    if (fpme->post_vs)
 197       draw_pt_post_vs_destroy( fpme->post_vs );
 198
 199    FREE(middle);
 200 }
 201
 202
 203 struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit( struct draw_context *draw )
 204 {
 205    struct fetch_pipeline_middle_end *fpme = CALLOC_STRUCT( fetch_pipeline_middle_end );
 206    if (!fpme)
 207       goto fail;
 208
 209    fpme->base.prepare = fetch_pipeline_prepare;
 210    fpme->base.run     = fetch_pipeline_run;
 211    fpme->base.finish  = fetch_pipeline_finish;
 212    fpme->base.destroy = fetch_pipeline_destroy;
 213
 214    fpme->draw = draw;
 215
 216    fpme->fetch = draw_pt_fetch_create( draw );
 217    if (!fpme->fetch)
 218       goto fail;
 219
 220    fpme->post_vs = draw_pt_post_vs_create( draw );
 221    if (!fpme->post_vs)
 222       goto fail;
 223
 224    fpme->emit = draw_pt_emit_create( draw );
 225    if (!fpme->emit)
 226       goto fail;
 227
 228    return &fpme->base;
 229
 230  fail:
 231    if (fpme)
 232       fetch_pipeline_destroy( &fpme->base );
 233
 234    return NULL;
 235 }