src/gallium/drivers/softpipe/sp_state_derived.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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_math.h"
  29 #include "util/u_memory.h"
  30 #include "pipe/p_shader_tokens.h"
  31 #include "draw/draw_context.h"
  32 #include "draw/draw_vertex.h"
  33 #include "draw/draw_private.h"
  34 #include "sp_context.h"
  35 #include "sp_screen.h"
  36 #include "sp_state.h"
  37 #include "sp_texture.h"
  38 #include "sp_tex_tile_cache.h"
  39
  40
  41 /**
  42  * Mark the current vertex layout as "invalid".
  43  * We'll validate the vertex layout later, when we start to actually
  44  * render a point or line or tri.
  45  */
  46 static void
  47 invalidate_vertex_layout(struct softpipe_context *softpipe)
  48 {
  49    softpipe->vertex_info.num_attribs =  0;
  50 }
  51
  52
  53 /**
  54  * The vertex info describes how to convert the post-transformed vertices
  55  * (simple float[][4]) used by the 'draw' module into vertices for
  56  * rasterization.
  57  *
  58  * This function validates the vertex layout and returns a pointer to a
  59  * vertex_info object.
  60  */
  61 struct vertex_info *
  62 softpipe_get_vertex_info(struct softpipe_context *softpipe)
  63 {
  64    struct vertex_info *vinfo = &softpipe->vertex_info;
  65
  66    if (vinfo->num_attribs == 0) {
  67       /* compute vertex layout now */
  68       const struct sp_fragment_shader *spfs = softpipe->fs;
  69       struct vertex_info *vinfo_vbuf = &softpipe->vertex_info_vbuf;
  70       const uint num = draw_num_shader_outputs(softpipe->draw);
  71       uint i;
  72
  73       /* Tell draw_vbuf to simply emit the whole post-xform vertex
  74        * as-is.  No longer any need to try and emit draw vertex_header
  75        * info.
  76        */
  77       vinfo_vbuf->num_attribs = 0;
  78       for (i = 0; i < num; i++) {
  79          draw_emit_vertex_attr(vinfo_vbuf, EMIT_4F, INTERP_PERSPECTIVE, i);
  80       }
  81       draw_compute_vertex_size(vinfo_vbuf);
  82
  83       /*
  84        * Loop over fragment shader inputs, searching for the matching output
  85        * from the vertex shader.
  86        */
  87       vinfo->num_attribs = 0;
  88       for (i = 0; i < spfs->info.num_inputs; i++) {
  89          int src;
  90          enum interp_mode interp;
  91
  92          switch (spfs->info.input_interpolate[i]) {
  93          case TGSI_INTERPOLATE_CONSTANT:
  94             interp = INTERP_CONSTANT;
  95             break;
  96          case TGSI_INTERPOLATE_LINEAR:
  97             interp = INTERP_LINEAR;
  98             break;
  99          case TGSI_INTERPOLATE_PERSPECTIVE:
 100             interp = INTERP_PERSPECTIVE;
 101             break;
 102          default:
 103             assert(0);
 104             interp = INTERP_LINEAR;
 105          }
 106
 107          switch (spfs->info.input_semantic_name[i]) {
 108          case TGSI_SEMANTIC_POSITION:
 109             interp = INTERP_POS;
 110             break;
 111
 112          case TGSI_SEMANTIC_COLOR:
 113             if (softpipe->rasterizer->flatshade) {
 114                interp = INTERP_CONSTANT;
 115             }
 116             break;
 117          }
 118
 119          /* this includes texcoords and varying vars */
 120          src = draw_find_shader_output(softpipe->draw,
 121                                        spfs->info.input_semantic_name[i],
 122                                        spfs->info.input_semantic_index[i]);
 123          draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
 124       }
 125
 126       softpipe->psize_slot = draw_find_shader_output(softpipe->draw,
 127                                                  TGSI_SEMANTIC_PSIZE, 0);
 128       if (softpipe->psize_slot > 0) {
 129          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT,
 130                                softpipe->psize_slot);
 131       }
 132
 133       draw_compute_vertex_size(vinfo);
 134    }
 135
 136    return vinfo;
 137 }
 138
 139
 140 /**
 141  * Called from vbuf module.
 142  *
 143  * Note that there's actually two different vertex layouts in softpipe.
 144  *
 145  * The normal one is computed in softpipe_get_vertex_info() above and is
 146  * used by the point/line/tri "setup" code.
 147  *
 148  * The other one (this one) is only used by the vbuf module (which is
 149  * not normally used by default but used in testing).  For the vbuf module,
 150  * we basically want to pass-through the draw module's vertex layout as-is.
 151  * When the softpipe vbuf code begins drawing, the normal vertex layout
 152  * will come into play again.
 153  */
 154 struct vertex_info *
 155 softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe)
 156 {
 157    (void) softpipe_get_vertex_info(softpipe);
 158    return &softpipe->vertex_info_vbuf;
 159 }
 160
 161
 162 /**
 163  * Recompute cliprect from scissor bounds, scissor enable and surface size.
 164  */
 165 static void
 166 compute_cliprect(struct softpipe_context *sp)
 167 {
 168    /* SP_NEW_FRAMEBUFFER
 169     */
 170    uint surfWidth = sp->framebuffer.width;
 171    uint surfHeight = sp->framebuffer.height;
 172
 173    /* SP_NEW_RASTERIZER
 174     */
 175    if (sp->rasterizer->scissor) {
 176
 177       /* SP_NEW_SCISSOR
 178        *
 179        * clip to scissor rect:
 180        */
 181       sp->cliprect.minx = MAX2(sp->scissor.minx, 0);
 182       sp->cliprect.miny = MAX2(sp->scissor.miny, 0);
 183       sp->cliprect.maxx = MIN2(sp->scissor.maxx, surfWidth);
 184       sp->cliprect.maxy = MIN2(sp->scissor.maxy, surfHeight);
 185    }
 186    else {
 187       /* clip to surface bounds */
 188       sp->cliprect.minx = 0;
 189       sp->cliprect.miny = 0;
 190       sp->cliprect.maxx = surfWidth;
 191       sp->cliprect.maxy = surfHeight;
 192    }
 193 }
 194
 195
 196 static void
 197 update_tgsi_samplers( struct softpipe_context *softpipe )
 198 {
 199    unsigned i;
 200
 201    softpipe_reset_sampler_varients( softpipe );
 202
 203    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 204       struct softpipe_tex_tile_cache *tc = softpipe->tex_cache[i];
 205       if (tc->texture) {
 206          struct softpipe_texture *spt = softpipe_texture(tc->texture);
 207          if (spt->timestamp != tc->timestamp) {
 208             sp_tex_tile_cache_validate_texture( tc );
 209             /*
 210             _debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);
 211             */
 212             tc->timestamp = spt->timestamp;
 213          }
 214       }
 215    }
 216
 217    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 218       struct softpipe_tex_tile_cache *tc = softpipe->vertex_tex_cache[i];
 219
 220       if (tc->texture) {
 221          struct softpipe_texture *spt = softpipe_texture(tc->texture);
 222
 223          if (spt->timestamp != tc->timestamp) {
 224             sp_tex_tile_cache_validate_texture(tc);
 225             tc->timestamp = spt->timestamp;
 226          }
 227       }
 228    }
 229 }
 230
 231
 232 /* Hopefully this will remain quite simple, otherwise need to pull in
 233  * something like the state tracker mechanism.
 234  */
 235 void softpipe_update_derived( struct softpipe_context *softpipe )
 236 {
 237    struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);
 238
 239    /* Check for updated textures.
 240     */
 241    if (softpipe->tex_timestamp != sp_screen->timestamp) {
 242       softpipe->tex_timestamp = sp_screen->timestamp;
 243       softpipe->dirty |= SP_NEW_TEXTURE;
 244    }
 245
 246    if (softpipe->dirty & (SP_NEW_SAMPLER |
 247                           SP_NEW_TEXTURE |
 248                           SP_NEW_FS |
 249                           SP_NEW_VS))
 250       update_tgsi_samplers( softpipe );
 251
 252    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 253                           SP_NEW_FS |
 254                           SP_NEW_VS))
 255       invalidate_vertex_layout( softpipe );
 256
 257    if (softpipe->dirty & (SP_NEW_SCISSOR |
 258                           SP_NEW_RASTERIZER |
 259                           SP_NEW_FRAMEBUFFER))
 260       compute_cliprect(softpipe);
 261
 262    if (softpipe->dirty & (SP_NEW_BLEND |
 263                           SP_NEW_DEPTH_STENCIL_ALPHA |
 264                           SP_NEW_FRAMEBUFFER |
 265                           SP_NEW_FS))
 266       sp_build_quad_pipeline(softpipe);
 267
 268    softpipe->dirty = 0;
 269 }