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       const enum interp_mode colorInterp
  70          = softpipe->rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
  71       struct vertex_info *vinfo_vbuf = &softpipe->vertex_info_vbuf;
  72       const uint num = draw_num_vs_outputs(softpipe->draw);
  73       uint i;
  74
  75       /* Tell draw_vbuf to simply emit the whole post-xform vertex
  76        * as-is.  No longer any need to try and emit draw vertex_header
  77        * info.
  78        */
  79       vinfo_vbuf->num_attribs = 0;
  80       for (i = 0; i < num; i++) {
  81          draw_emit_vertex_attr(vinfo_vbuf, EMIT_4F, INTERP_PERSPECTIVE, i);
  82       }
  83       draw_compute_vertex_size(vinfo_vbuf);
  84
  85       /*
  86        * Loop over fragment shader inputs, searching for the matching output
  87        * from the vertex shader.
  88        */
  89       vinfo->num_attribs = 0;
  90       for (i = 0; i < spfs->info.num_inputs; i++) {
  91          int src;
  92          enum interp_mode interp;
  93
  94          switch (spfs->info.input_interpolate[i]) {
  95          case TGSI_INTERPOLATE_CONSTANT:
  96             interp = INTERP_CONSTANT;
  97             break;
  98          case TGSI_INTERPOLATE_LINEAR:
  99             interp = INTERP_LINEAR;
 100             break;
 101          case TGSI_INTERPOLATE_PERSPECTIVE:
 102             interp = INTERP_PERSPECTIVE;
 103             break;
 104          default:
 105             assert(0);
 106             interp = INTERP_LINEAR;
 107          }
 108
 109          switch (spfs->info.input_semantic_name[i]) {
 110          case TGSI_SEMANTIC_POSITION:
 111             src = draw_find_vs_output(softpipe->draw,
 112                                       TGSI_SEMANTIC_POSITION, 0);
 113             draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_POS, src);
 114             break;
 115
 116          case TGSI_SEMANTIC_COLOR:
 117             src = draw_find_vs_output(softpipe->draw, TGSI_SEMANTIC_COLOR,
 118                                  spfs->info.input_semantic_index[i]);
 119             draw_emit_vertex_attr(vinfo, EMIT_4F, colorInterp, src);
 120             break;
 121
 122          case TGSI_SEMANTIC_FOG:
 123             src = draw_find_vs_output(softpipe->draw, TGSI_SEMANTIC_FOG, 0);
 124             draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
 125             break;
 126
 127          case TGSI_SEMANTIC_GENERIC:
 128          case TGSI_SEMANTIC_FACE:
 129             /* this includes texcoords and varying vars */
 130             src = draw_find_vs_output(softpipe->draw, TGSI_SEMANTIC_GENERIC,
 131                                       spfs->info.input_semantic_index[i]);
 132             draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
 133             break;
 134
 135          default:
 136             assert(0);
 137          }
 138       }
 139
 140       softpipe->psize_slot = draw_find_vs_output(softpipe->draw,
 141                                                  TGSI_SEMANTIC_PSIZE, 0);
 142       if (softpipe->psize_slot > 0) {
 143          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT,
 144                                softpipe->psize_slot);
 145       }
 146
 147       draw_compute_vertex_size(vinfo);
 148    }
 149
 150    return vinfo;
 151 }
 152
 153
 154 /**
 155  * Called from vbuf module.
 156  *
 157  * Note that there's actually two different vertex layouts in softpipe.
 158  *
 159  * The normal one is computed in softpipe_get_vertex_info() above and is
 160  * used by the point/line/tri "setup" code.
 161  *
 162  * The other one (this one) is only used by the vbuf module (which is
 163  * not normally used by default but used in testing).  For the vbuf module,
 164  * we basically want to pass-through the draw module's vertex layout as-is.
 165  * When the softpipe vbuf code begins drawing, the normal vertex layout
 166  * will come into play again.
 167  */
 168 struct vertex_info *
 169 softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe)
 170 {
 171    (void) softpipe_get_vertex_info(softpipe);
 172    return &softpipe->vertex_info_vbuf;
 173 }
 174
 175
 176 /**
 177  * Recompute cliprect from scissor bounds, scissor enable and surface size.
 178  */
 179 static void
 180 compute_cliprect(struct softpipe_context *sp)
 181 {
 182    /* SP_NEW_FRAMEBUFFER
 183     */
 184    uint surfWidth = sp->framebuffer.width;
 185    uint surfHeight = sp->framebuffer.height;
 186
 187    /* SP_NEW_RASTERIZER
 188     */
 189    if (sp->rasterizer->scissor) {
 190
 191       /* SP_NEW_SCISSOR
 192        *
 193        * clip to scissor rect:
 194        */
 195       sp->cliprect.minx = MAX2(sp->scissor.minx, 0);
 196       sp->cliprect.miny = MAX2(sp->scissor.miny, 0);
 197       sp->cliprect.maxx = MIN2(sp->scissor.maxx, surfWidth);
 198       sp->cliprect.maxy = MIN2(sp->scissor.maxy, surfHeight);
 199    }
 200    else {
 201       /* clip to surface bounds */
 202       sp->cliprect.minx = 0;
 203       sp->cliprect.miny = 0;
 204       sp->cliprect.maxx = surfWidth;
 205       sp->cliprect.maxy = surfHeight;
 206    }
 207 }
 208
 209
 210 static void
 211 update_tgsi_samplers( struct softpipe_context *softpipe )
 212 {
 213    unsigned i;
 214
 215    softpipe_reset_sampler_varients( softpipe );
 216
 217    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 218       struct softpipe_tex_tile_cache *tc = softpipe->tex_cache[i];
 219       if (tc->texture) {
 220          struct softpipe_texture *spt = softpipe_texture(tc->texture);
 221          if (spt->timestamp != tc->timestamp) {
 222             sp_tex_tile_cache_validate_texture( tc );
 223             /*
 224             _debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);
 225             */
 226             tc->timestamp = spt->timestamp;
 227          }
 228       }
 229    }
 230 }
 231
 232
 233 /* Hopefully this will remain quite simple, otherwise need to pull in
 234  * something like the state tracker mechanism.
 235  */
 236 void softpipe_update_derived( struct softpipe_context *softpipe )
 237 {
 238    struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);
 239
 240    /* Check for updated textures.
 241     */
 242    if (softpipe->tex_timestamp != sp_screen->timestamp) {
 243       softpipe->tex_timestamp = sp_screen->timestamp;
 244       softpipe->dirty |= SP_NEW_TEXTURE;
 245    }
 246
 247    if (softpipe->dirty & (SP_NEW_SAMPLER |
 248                           SP_NEW_TEXTURE |
 249                           SP_NEW_FS |
 250                           SP_NEW_VS))
 251       update_tgsi_samplers( softpipe );
 252
 253    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 254                           SP_NEW_FS |
 255                           SP_NEW_VS))
 256       invalidate_vertex_layout( softpipe );
 257
 258    if (softpipe->dirty & (SP_NEW_SCISSOR |
 259                           SP_NEW_RASTERIZER |
 260                           SP_NEW_FRAMEBUFFER))
 261       compute_cliprect(softpipe);
 262
 263    if (softpipe->dirty & (SP_NEW_BLEND |
 264                           SP_NEW_DEPTH_STENCIL_ALPHA |
 265                           SP_NEW_FRAMEBUFFER |
 266                           SP_NEW_FS))
 267       sp_build_quad_pipeline(softpipe);
 268
 269    softpipe->dirty = 0;
 270 }