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