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_private.h"
  31 #include "draw/draw_vbuf.h"
  32 #include "draw/draw_vertex.h"
  33 #include "draw/draw_pt.h"
  34
  35 struct fetch_pipeline_middle_end {
  36    struct draw_pt_middle_end base;
  37    struct draw_context *draw;
  38
  39    struct {
  40       const ubyte *ptr;
  41       unsigned pitch;
  42       void (*fetch)( const void *from, float *attrib);
  43       void (*emit)( const float *attrib, float **out );
  44    } fetch[PIPE_MAX_ATTRIBS];
  45
  46    unsigned nr_fetch;
  47    unsigned pipeline_vertex_size;
  48    unsigned hw_vertex_size;
  49    unsigned prim;
  50 };
  51
  52 #if 0
  53 static void emit_R32_FLOAT( const float *attrib,
  54                             float **out )
  55 {
  56    (*out)[0] = attrib[0];
  57    (*out) += 1;
  58 }
  59
  60 static void emit_R32G32_FLOAT( const float *attrib,
  61                                float **out )
  62 {
  63    (*out)[0] = attrib[0];
  64    (*out)[1] = attrib[1];
  65    (*out) += 2;
  66 }
  67
  68 static void emit_R32G32B32_FLOAT( const float *attrib,
  69                                   float **out )
  70 {
  71    (*out)[0] = attrib[0];
  72    (*out)[1] = attrib[1];
  73    (*out)[2] = attrib[2];
  74    (*out) += 3;
  75 }
  76 #endif
  77 static void emit_R32G32B32A32_FLOAT( const float *attrib,
  78                                      float **out )
  79 {
  80    (*out)[0] = attrib[0];
  81    (*out)[1] = attrib[1];
  82    (*out)[2] = attrib[2];
  83    (*out)[3] = attrib[3];
  84    (*out) += 4;
  85 }
  86
  87 static void fetch_pipeline_prepare( struct draw_pt_middle_end *middle,
  88                                     unsigned prim )
  89 {
  90    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
  91    struct draw_context *draw = fpme->draw;
  92    unsigned i, nr = 0;
  93    boolean ok;
  94    const struct vertex_info *vinfo;
  95
  96    fpme->prim = prim;
  97
  98    ok = draw->render->set_primitive(draw->render, prim);
  99    if (!ok) {
 100       assert(0);
 101       return;
 102    }
 103    /* Must do this after set_primitive() above:
 104     */
 105    vinfo = draw->render->get_vertex_info(draw->render);
 106
 107    /* Need to look at vertex shader inputs (we know it is a
 108     * passthrough shader, so these define the outputs too).  If we
 109     * were running a shader, we'd still be looking at the inputs at
 110     * this point.
 111     */
 112    for (i = 0; i < draw->vertex_shader->info.num_inputs; i++) {
 113       unsigned buf = draw->vertex_element[i].vertex_buffer_index;
 114       enum pipe_format format  = draw->vertex_element[i].src_format;
 115
 116       fpme->fetch[nr].ptr = ((const ubyte *) draw->user.vbuffer[buf] +
 117                             draw->vertex_buffer[buf].buffer_offset +
 118                             draw->vertex_element[i].src_offset);
 119
 120       fpme->fetch[nr].pitch = draw->vertex_buffer[buf].pitch;
 121       fpme->fetch[nr].fetch = draw_get_fetch_func( format );
 122
 123       /* Always do this -- somewhat redundant...
 124        */
 125       fpme->fetch[nr].emit = emit_R32G32B32A32_FLOAT;
 126       nr++;
 127    }
 128
 129    fpme->nr_fetch = nr;
 130    //fpme->pipeline_vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
 131    fpme->pipeline_vertex_size = MAX_VERTEX_ALLOCATION;
 132    fpme->hw_vertex_size = vinfo->size * 4;
 133 }
 134
 135
 136
 137
 138 static void fetch_pipeline_run( struct draw_pt_middle_end *middle,
 139                                 const unsigned *fetch_elts,
 140                                 unsigned fetch_count,
 141                                 const ushort *draw_elts,
 142                                 unsigned draw_count )
 143 {
 144    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 145    struct draw_context *draw = fpme->draw;
 146    struct draw_vertex_shader *shader = draw->vertex_shader;
 147    char *pipeline_verts;
 148
 149    pipeline_verts = MALLOC(fpme->pipeline_vertex_size *
 150                            fetch_count);
 151
 152    if (!pipeline_verts) {
 153       assert(0);
 154       return;
 155    }
 156
 157
 158    /* Shade
 159     */
 160    shader->prepare(shader, draw);
 161    if (shader->run(shader, draw, fetch_elts, fetch_count, pipeline_verts,
 162                    fpme->pipeline_vertex_size)) {
 163       /* Run the pipeline */
 164       draw_pt_run_pipeline( fpme->draw,
 165                             fpme->prim,
 166                             pipeline_verts,
 167                             fpme->pipeline_vertex_size,
 168                             fetch_count,
 169                             draw_elts,
 170                             draw_count );
 171    } else {
 172       unsigned i, j;
 173       void *hw_verts;
 174       float *out;
 175
 176       /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 177        */
 178       draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 179
 180       hw_verts = draw->render->allocate_vertices(draw->render,
 181                                                  (ushort)fpme->hw_vertex_size,
 182                                                  (ushort)fetch_count);
 183       if (!hw_verts) {
 184          assert(0);
 185          return;
 186       }
 187
 188       out = (float *)hw_verts;
 189       for (i = 0; i < fetch_count; i++) {
 190          struct vertex_header *header =
 191             (struct vertex_header*)(pipeline_verts + (fpme->pipeline_vertex_size * i));
 192
 193          for (j = 0; j < fpme->nr_fetch; j++) {
 194             float *attrib = header->data[j];
 195             /*debug_printf("emiting [%f, %f, %f, %f]\n",
 196                          attrib[0], attrib[1],
 197                          attrib[2], attrib[3]);*/
 198             fpme->fetch[j].emit(attrib, &out);
 199          }
 200       }
 201       /* XXX: Draw arrays path to avoid re-emitting index list again and
 202        * again.
 203        */
 204       draw->render->draw(draw->render,
 205                          draw_elts,
 206                          draw_count);
 207
 208       draw->render->release_vertices(draw->render,
 209                                      hw_verts,
 210                                      fpme->hw_vertex_size,
 211                                      fetch_count);
 212    }
 213
 214
 215    FREE(pipeline_verts);
 216 }
 217
 218
 219
 220 static void fetch_pipeline_finish( struct draw_pt_middle_end *middle )
 221 {
 222    /* nothing to do */
 223 }
 224
 225 static void fetch_pipeline_destroy( struct draw_pt_middle_end *middle )
 226 {
 227    FREE(middle);
 228 }
 229
 230
 231 struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit( struct draw_context *draw )
 232 {
 233    struct fetch_pipeline_middle_end *fetch_pipeline = CALLOC_STRUCT( fetch_pipeline_middle_end );
 234
 235    fetch_pipeline->base.prepare = fetch_pipeline_prepare;
 236    fetch_pipeline->base.run     = fetch_pipeline_run;
 237    fetch_pipeline->base.finish  = fetch_pipeline_finish;
 238    fetch_pipeline->base.destroy = fetch_pipeline_destroy;
 239
 240    fetch_pipeline->draw = draw;
 241
 242    return &fetch_pipeline->base;
 243 }