src/gallium/auxiliary/draw/draw_pt_fetch_shade_emit.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  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   */
  32
  33
  34 #include "pipe/p_util.h"
  35 #include "draw/draw_context.h"
  36 #include "draw/draw_private.h"
  37 #include "draw/draw_vbuf.h"
  38 #include "draw/draw_vertex.h"
  39 #include "draw/draw_pt.h"
  40 #include "draw/draw_vs.h"
  41
  42 #include "translate/translate.h"
  43
  44 struct fetch_shade_emit;
  45
  46
  47 /* Prototype fetch, shade, emit-hw-verts all in one go.
  48  */
  49 struct fetch_shade_emit {
  50    struct draw_pt_middle_end base;
  51    struct draw_context *draw;
  52
  53
  54    /* Temporaries:
  55     */
  56    const float *constants;
  57    unsigned pitch[PIPE_MAX_ATTRIBS];
  58    const ubyte *src[PIPE_MAX_ATTRIBS];
  59    unsigned prim;
  60
  61    struct draw_vs_varient_key key;
  62    struct draw_vs_varient *active;
  63 };
  64
  65
  66
  67
  68 static void fse_prepare( struct draw_pt_middle_end *middle,
  69                          unsigned prim,
  70                          unsigned opt )
  71 {
  72    struct fetch_shade_emit *fse = (struct fetch_shade_emit *)middle;
  73    struct draw_context *draw = fse->draw;
  74    unsigned num_vs_inputs = draw->vs.vertex_shader->info.num_inputs;
  75    unsigned num_vs_outputs = draw->vs.vertex_shader->info.num_outputs;
  76    const struct vertex_info *vinfo;
  77    unsigned i;
  78    boolean need_psize = 0;
  79
  80
  81    if (draw->pt.user.elts) {
  82       assert(0);
  83       return ;
  84    }
  85
  86    if (!draw->render->set_primitive( draw->render,
  87                                      prim )) {
  88       assert(0);
  89       return;
  90    }
  91
  92    /* Must do this after set_primitive() above:
  93     */
  94    vinfo = draw->render->get_vertex_info(draw->render);
  95
  96
  97
  98    fse->key.output_stride = vinfo->size * 4;
  99    fse->key.nr_elements = MAX2(num_vs_outputs,     /* outputs - translate to hw format */
 100                                num_vs_inputs);     /* inputs - fetch from api format */
 101
 102    fse->key.viewport = 1;
 103    fse->key.clip = 0;
 104    fse->key.pad = 0;
 105
 106    memset(fse->key.element, 0,
 107           fse->key.nr_elements * sizeof(fse->key.element[0]));
 108
 109    for (i = 0; i < num_vs_inputs; i++) {
 110       const struct pipe_vertex_element *src = &draw->pt.vertex_element[i];
 111       fse->key.element[i].in.format = src->src_format;
 112
 113       /* Consider ignoring these, ie make generated programs
 114        * independent of this state:
 115        */
 116       fse->key.element[i].in.buffer = src->vertex_buffer_index;
 117       fse->key.element[i].in.offset = src->src_offset;
 118    }
 119
 120
 121    {
 122       unsigned dst_offset = 0;
 123
 124       for (i = 0; i < vinfo->num_attribs; i++) {
 125          unsigned emit_sz = 0;
 126          unsigned output_format = PIPE_FORMAT_NONE;
 127          unsigned vs_output = vinfo->src_index[i];
 128
 129          switch (vinfo->emit[i]) {
 130          case EMIT_4F:
 131             output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 132             emit_sz = 4 * sizeof(float);
 133             break;
 134          case EMIT_3F:
 135             output_format = PIPE_FORMAT_R32G32B32_FLOAT;
 136             emit_sz = 3 * sizeof(float);
 137             break;
 138          case EMIT_2F:
 139             output_format = PIPE_FORMAT_R32G32_FLOAT;
 140             emit_sz = 2 * sizeof(float);
 141             break;
 142          case EMIT_1F:
 143             output_format = PIPE_FORMAT_R32_FLOAT;
 144             emit_sz = 1 * sizeof(float);
 145             break;
 146          case EMIT_1F_PSIZE:
 147             need_psize = 1;
 148             output_format = PIPE_FORMAT_R32_FLOAT;
 149             emit_sz = 1 * sizeof(float);
 150             vs_output = num_vs_outputs + 1;
 151
 152             break;
 153          default:
 154             assert(0);
 155             break;
 156          }
 157
 158          /* The elements in the key correspond to vertex shader output
 159           * numbers, not to positions in the hw vertex description --
 160           * that's handled by the output_offset field.
 161           */
 162          fse->key.element[vs_output].out.format = output_format;
 163          fse->key.element[vs_output].out.offset = dst_offset;
 164
 165          dst_offset += emit_sz;
 166          assert(fse->key.output_stride >= dst_offset);
 167       }
 168    }
 169
 170    /* To make psize work, really need to tell the vertex shader to
 171     * copy that value from input->output.  For 'translate' this was
 172     * implicit for all elements.
 173     */
 174 #if 0
 175    if (need_psize) {
 176       unsigned input = num_vs_inputs + 1;
 177       const struct pipe_vertex_element *src = &draw->pt.vertex_element[i];
 178       fse->key.element[i].input_format = PIPE_FORMAT_R32_FLOAT;
 179       fse->key.element[i].input_buffer = 0; //nr_buffers + 1;
 180       fse->key.element[i].input_offset = 0;
 181
 182       fse->key.nr_elements += 1;
 183
 184    }
 185 #endif
 186
 187    /* Would normally look up a vertex shader and peruse its list of
 188     * varients somehow.  We omitted that step and put all the
 189     * hardcoded "shaders" into an array.  We're just making the
 190     * assumption that this happens to be a matching shader...  ie
 191     * you're running isosurf, aren't you?
 192     */
 193    fse->active = draw_vs_lookup_varient( draw->vs.vertex_shader,
 194                                          &fse->key );
 195
 196    if (!fse->active) {
 197       assert(0);
 198       return ;
 199    }
 200
 201    /* Now set buffer pointers:
 202     */
 203    for (i = 0; i < num_vs_inputs; i++) {
 204       unsigned buf = draw->pt.vertex_element[i].vertex_buffer_index;
 205
 206       fse->active->set_input( fse->active,
 207                               i,
 208
 209                               ((const ubyte *) draw->pt.user.vbuffer[buf] +
 210                                draw->pt.vertex_buffer[buf].buffer_offset),
 211
 212                               draw->pt.vertex_buffer[buf].pitch );
 213    }
 214
 215    fse->active->set_constants( fse->active,
 216                                (const float (*)[4])draw->pt.user.constants );
 217
 218    fse->active->set_viewport( fse->active,
 219                               &draw->viewport );
 220
 221    //return TRUE;
 222 }
 223
 224
 225
 226
 227
 228
 229
 230 static void fse_run_linear( struct draw_pt_middle_end *middle,
 231                             unsigned start,
 232                             unsigned count )
 233 {
 234    struct fetch_shade_emit *fse = (struct fetch_shade_emit *)middle;
 235    struct draw_context *draw = fse->draw;
 236    unsigned alloc_count = align(count, 4);
 237    char *hw_verts;
 238
 239    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 240     */
 241    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 242
 243    hw_verts = draw->render->allocate_vertices( draw->render,
 244                                                (ushort)fse->key.output_stride,
 245                                                (ushort)alloc_count );
 246
 247    if (!hw_verts) {
 248       assert(0);
 249       return;
 250    }
 251
 252    /* Single routine to fetch vertices, run shader and emit HW verts.
 253     * Clipping and viewport transformation are done elsewhere --
 254     * either by the API or on hardware, or for some other reason not
 255     * required...
 256     */
 257    fse->active->run_linear( fse->active,
 258                             start, count,
 259                             hw_verts );
 260
 261    /* Draw arrays path to avoid re-emitting index list again and
 262     * again.
 263     */
 264    draw->render->draw_arrays( draw->render,
 265                               0,
 266                               count );
 267
 268
 269    draw->render->release_vertices( draw->render,
 270                                    hw_verts,
 271                                    fse->key.output_stride,
 272                                    count );
 273 }
 274
 275
 276 static void
 277 fse_run(struct draw_pt_middle_end *middle,
 278         const unsigned *fetch_elts,
 279         unsigned fetch_count,
 280         const ushort *draw_elts,
 281         unsigned draw_count )
 282 {
 283    struct fetch_shade_emit *fse = (struct fetch_shade_emit *)middle;
 284    struct draw_context *draw = fse->draw;
 285    unsigned alloc_count = align(fetch_count, 4);
 286    void *hw_verts;
 287
 288    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 289     */
 290    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 291
 292    hw_verts = draw->render->allocate_vertices( draw->render,
 293                                                (ushort)fse->key.output_stride,
 294                                                (ushort)alloc_count );
 295    if (!hw_verts) {
 296       assert(0);
 297       return;
 298    }
 299
 300
 301    /* Single routine to fetch vertices, run shader and emit HW verts.
 302     */
 303    fse->active->run_elts( fse->active,
 304                           fetch_elts,
 305                           fetch_count,
 306                           hw_verts );
 307
 308    draw->render->draw( draw->render,
 309                        draw_elts,
 310                        draw_count );
 311
 312    draw->render->release_vertices( draw->render,
 313                                    hw_verts,
 314                                    fse->key.output_stride,
 315                                    fetch_count );
 316
 317 }
 318
 319
 320 static void fse_finish( struct draw_pt_middle_end *middle )
 321 {
 322 }
 323
 324
 325 static void
 326 fse_destroy( struct draw_pt_middle_end *middle )
 327 {
 328    FREE(middle);
 329 }
 330
 331 struct draw_pt_middle_end *draw_pt_middle_fse( struct draw_context *draw )
 332 {
 333    struct fetch_shade_emit *fse = CALLOC_STRUCT(fetch_shade_emit);
 334    if (!fse)
 335       return NULL;
 336
 337    fse->base.prepare = fse_prepare;
 338    fse->base.run = fse_run;
 339    fse->base.run_linear = fse_run_linear;
 340    fse->base.finish = fse_finish;
 341    fse->base.destroy = fse_destroy;
 342    fse->draw = draw;
 343
 344    return &fse->base;
 345 }