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          switch (spfs->info.input_semantic_name[i]) {
  93          case TGSI_SEMANTIC_POSITION:
  94             src = draw_find_vs_output(softpipe->draw,
  95                                       TGSI_SEMANTIC_POSITION, 0);
  96             draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_POS, src);
  97             break;
  98
  99          case TGSI_SEMANTIC_COLOR:
 100             src = draw_find_vs_output(softpipe->draw, TGSI_SEMANTIC_COLOR,
 101                                  spfs->info.input_semantic_index[i]);
 102             draw_emit_vertex_attr(vinfo, EMIT_4F, colorInterp, src);
 103             break;
 104
 105          case TGSI_SEMANTIC_FOG:
 106             src = draw_find_vs_output(softpipe->draw, TGSI_SEMANTIC_FOG, 0);
 107             draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
 108             break;
 109
 110          case TGSI_SEMANTIC_GENERIC:
 111          case TGSI_SEMANTIC_FACE:
 112             /* this includes texcoords and varying vars */
 113             src = draw_find_vs_output(softpipe->draw, TGSI_SEMANTIC_GENERIC,
 114                                       spfs->info.input_semantic_index[i]);
 115             draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
 116             break;
 117
 118          default:
 119             assert(0);
 120          }
 121       }
 122
 123       softpipe->psize_slot = draw_find_vs_output(softpipe->draw,
 124                                                  TGSI_SEMANTIC_PSIZE, 0);
 125       if (softpipe->psize_slot > 0) {
 126          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT,
 127                                softpipe->psize_slot);
 128       }
 129
 130       draw_compute_vertex_size(vinfo);
 131    }
 132
 133    return vinfo;
 134 }
 135
 136
 137 /**
 138  * Called from vbuf module.
 139  *
 140  * Note that there's actually two different vertex layouts in softpipe.
 141  *
 142  * The normal one is computed in softpipe_get_vertex_info() above and is
 143  * used by the point/line/tri "setup" code.
 144  *
 145  * The other one (this one) is only used by the vbuf module (which is
 146  * not normally used by default but used in testing).  For the vbuf module,
 147  * we basically want to pass-through the draw module's vertex layout as-is.
 148  * When the softpipe vbuf code begins drawing, the normal vertex layout
 149  * will come into play again.
 150  */
 151 struct vertex_info *
 152 softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe)
 153 {
 154    (void) softpipe_get_vertex_info(softpipe);
 155    return &softpipe->vertex_info_vbuf;
 156 }
 157
 158
 159 /**
 160  * Recompute cliprect from scissor bounds, scissor enable and surface size.
 161  */
 162 static void
 163 compute_cliprect(struct softpipe_context *sp)
 164 {
 165    /* SP_NEW_FRAMEBUFFER
 166     */
 167    uint surfWidth = sp->framebuffer.width;
 168    uint surfHeight = sp->framebuffer.height;
 169
 170    /* SP_NEW_RASTERIZER
 171     */
 172    if (sp->rasterizer->scissor) {
 173
 174       /* SP_NEW_SCISSOR
 175        *
 176        * clip to scissor rect:
 177        */
 178       sp->cliprect.minx = MAX2(sp->scissor.minx, 0);
 179       sp->cliprect.miny = MAX2(sp->scissor.miny, 0);
 180       sp->cliprect.maxx = MIN2(sp->scissor.maxx, surfWidth);
 181       sp->cliprect.maxy = MIN2(sp->scissor.maxy, surfHeight);
 182    }
 183    else {
 184       /* clip to surface bounds */
 185       sp->cliprect.minx = 0;
 186       sp->cliprect.miny = 0;
 187       sp->cliprect.maxx = surfWidth;
 188       sp->cliprect.maxy = surfHeight;
 189    }
 190 }
 191
 192
 193 static void
 194 update_tgsi_samplers( struct softpipe_context *softpipe )
 195 {
 196    unsigned i;
 197
 198    softpipe_reset_sampler_varients( softpipe );
 199
 200    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 201       struct softpipe_tex_tile_cache *tc = softpipe->tex_cache[i];
 202       if (tc->texture) {
 203          struct softpipe_texture *spt = softpipe_texture(tc->texture);
 204          if (spt->timestamp != tc->timestamp) {
 205             sp_tex_tile_cache_validate_texture( tc );
 206             _debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);
 207             tc->timestamp = spt->timestamp;
 208          }
 209       }
 210    }
 211 }
 212
 213
 214 /* Hopefully this will remain quite simple, otherwise need to pull in
 215  * something like the state tracker mechanism.
 216  */
 217 void softpipe_update_derived( struct softpipe_context *softpipe )
 218 {
 219    struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);
 220
 221    /* Check for updated textures.
 222     */
 223    if (softpipe->tex_timestamp != sp_screen->timestamp) {
 224       softpipe->tex_timestamp = sp_screen->timestamp;
 225       softpipe->dirty |= SP_NEW_TEXTURE;
 226    }
 227
 228    if (softpipe->dirty & (SP_NEW_SAMPLER |
 229                           SP_NEW_TEXTURE |
 230                           SP_NEW_FS |
 231                           SP_NEW_VS))
 232       update_tgsi_samplers( softpipe );
 233
 234    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 235                           SP_NEW_FS |
 236                           SP_NEW_VS))
 237       invalidate_vertex_layout( softpipe );
 238
 239    if (softpipe->dirty & (SP_NEW_SCISSOR |
 240                           SP_NEW_RASTERIZER |
 241                           SP_NEW_FRAMEBUFFER))
 242       compute_cliprect(softpipe);
 243
 244    if (softpipe->dirty & (SP_NEW_BLEND |
 245                           SP_NEW_DEPTH_STENCIL_ALPHA |
 246                           SP_NEW_FRAMEBUFFER |
 247                           SP_NEW_FS))
 248       sp_build_quad_pipeline(softpipe);
 249
 250    softpipe->dirty = 0;
 251 }