src/gallium/drivers/llvmpipe/lp_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 "lp_context.h"
  35 #include "lp_screen.h"
  36 #include "lp_tex_cache.h"
  37 #include "lp_state.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 llvmpipe_context *llvmpipe)
  47 {
  48    llvmpipe->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 llvmpipe_get_vertex_info(struct llvmpipe_context *llvmpipe)
  62 {
  63    struct vertex_info *vinfo = &llvmpipe->vertex_info;
  64
  65    if (vinfo->num_attribs == 0) {
  66       /* compute vertex layout now */
  67       const struct lp_fragment_shader *lpfs = llvmpipe->fs;
  68       const enum interp_mode colorInterp
  69          = llvmpipe->rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
  70       uint i;
  71
  72       if (llvmpipe->vbuf) {
  73          /* if using the post-transform vertex buffer, tell draw_vbuf to
  74           * simply emit the whole post-xform vertex as-is:
  75           */
  76          struct vertex_info *vinfo_vbuf = &llvmpipe->vertex_info_vbuf;
  77          const uint num = draw_num_vs_outputs(llvmpipe->draw);
  78          uint i;
  79
  80          /* No longer any need to try and emit draw vertex_header info.
  81           */
  82          vinfo_vbuf->num_attribs = 0;
  83          for (i = 0; i < num; i++) {
  84             draw_emit_vertex_attr(vinfo_vbuf, EMIT_4F, INTERP_PERSPECTIVE, i);
  85          }
  86          draw_compute_vertex_size(vinfo_vbuf);
  87       }
  88
  89       /*
  90        * Loop over fragment shader inputs, searching for the matching output
  91        * from the vertex shader.
  92        */
  93       vinfo->num_attribs = 0;
  94       for (i = 0; i < lpfs->info.num_inputs; i++) {
  95          int src;
  96          enum interp_mode interp;
  97
  98          switch (lpfs->info.input_interpolate[i]) {
  99          case TGSI_INTERPOLATE_CONSTANT:
 100             interp = INTERP_CONSTANT;
 101             break;
 102          case TGSI_INTERPOLATE_LINEAR:
 103             interp = INTERP_LINEAR;
 104             break;
 105          case TGSI_INTERPOLATE_PERSPECTIVE:
 106             interp = INTERP_PERSPECTIVE;
 107             break;
 108          default:
 109             assert(0);
 110             interp = INTERP_LINEAR;
 111          }
 112
 113          switch (lpfs->info.input_semantic_name[i]) {
 114          case TGSI_SEMANTIC_POSITION:
 115             src = draw_find_vs_output(llvmpipe->draw,
 116                                       TGSI_SEMANTIC_POSITION, 0);
 117             draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_POS, src);
 118             break;
 119
 120          case TGSI_SEMANTIC_COLOR:
 121             src = draw_find_vs_output(llvmpipe->draw, TGSI_SEMANTIC_COLOR,
 122                                  lpfs->info.input_semantic_index[i]);
 123             draw_emit_vertex_attr(vinfo, EMIT_4F, colorInterp, src);
 124             break;
 125
 126          case TGSI_SEMANTIC_FOG:
 127             src = draw_find_vs_output(llvmpipe->draw, TGSI_SEMANTIC_FOG, 0);
 128             draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
 129             break;
 130
 131          case TGSI_SEMANTIC_GENERIC:
 132          case TGSI_SEMANTIC_FACE:
 133             /* this includes texcoords and varying vars */
 134             src = draw_find_vs_output(llvmpipe->draw, TGSI_SEMANTIC_GENERIC,
 135                                       lpfs->info.input_semantic_index[i]);
 136             draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
 137             break;
 138
 139          default:
 140             assert(0);
 141          }
 142       }
 143
 144       llvmpipe->psize_slot = draw_find_vs_output(llvmpipe->draw,
 145                                                  TGSI_SEMANTIC_PSIZE, 0);
 146       if (llvmpipe->psize_slot > 0) {
 147          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT,
 148                                llvmpipe->psize_slot);
 149       }
 150
 151       draw_compute_vertex_size(vinfo);
 152    }
 153
 154    return vinfo;
 155 }
 156
 157
 158 /**
 159  * Called from vbuf module.
 160  *
 161  * Note that there's actually two different vertex layouts in llvmpipe.
 162  *
 163  * The normal one is computed in llvmpipe_get_vertex_info() above and is
 164  * used by the point/line/tri "setup" code.
 165  *
 166  * The other one (this one) is only used by the vbuf module (which is
 167  * not normally used by default but used in testing).  For the vbuf module,
 168  * we basically want to pass-through the draw module's vertex layout as-is.
 169  * When the llvmpipe vbuf code begins drawing, the normal vertex layout
 170  * will come into play again.
 171  */
 172 struct vertex_info *
 173 llvmpipe_get_vbuf_vertex_info(struct llvmpipe_context *llvmpipe)
 174 {
 175    (void) llvmpipe_get_vertex_info(llvmpipe);
 176    return &llvmpipe->vertex_info_vbuf;
 177 }
 178
 179
 180 /**
 181  * Recompute cliprect from scissor bounds, scissor enable and surface size.
 182  */
 183 static void
 184 compute_cliprect(struct llvmpipe_context *lp)
 185 {
 186    /* LP_NEW_FRAMEBUFFER
 187     */
 188    uint surfWidth = lp->framebuffer.width;
 189    uint surfHeight = lp->framebuffer.height;
 190
 191    /* LP_NEW_RASTERIZER
 192     */
 193    if (lp->rasterizer->scissor) {
 194
 195       /* LP_NEW_SCISSOR
 196        *
 197        * clip to scissor rect:
 198        */
 199       lp->cliprect.minx = MAX2(lp->scissor.minx, 0);
 200       lp->cliprect.miny = MAX2(lp->scissor.miny, 0);
 201       lp->cliprect.maxx = MIN2(lp->scissor.maxx, surfWidth);
 202       lp->cliprect.maxy = MIN2(lp->scissor.maxy, surfHeight);
 203    }
 204    else {
 205       /* clip to surface bounds */
 206       lp->cliprect.minx = 0;
 207       lp->cliprect.miny = 0;
 208       lp->cliprect.maxx = surfWidth;
 209       lp->cliprect.maxy = surfHeight;
 210    }
 211 }
 212
 213
 214 static void
 215 update_tgsi_samplers( struct llvmpipe_context *llvmpipe )
 216 {
 217    unsigned i;
 218
 219    /* vertex shader samplers */
 220    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 221       llvmpipe->tgsi.vert_samplers[i].sampler = llvmpipe->sampler[i];
 222       llvmpipe->tgsi.vert_samplers[i].texture = llvmpipe->texture[i];
 223       llvmpipe->tgsi.frag_samplers[i].base.get_samples = lp_get_samples;
 224    }
 225
 226    /* fragment shader samplers */
 227    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 228       llvmpipe->tgsi.frag_samplers[i].sampler = llvmpipe->sampler[i];
 229       llvmpipe->tgsi.frag_samplers[i].texture = llvmpipe->texture[i];
 230       llvmpipe->tgsi.frag_samplers[i].base.get_samples = lp_get_samples;
 231    }
 232
 233    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 234       lp_tex_tile_cache_validate_texture( llvmpipe->tex_cache[i] );
 235    }
 236
 237    llvmpipe->jit_context.samplers = (struct tgsi_sampler **)llvmpipe->tgsi.frag_samplers_list;
 238 }
 239
 240 /* Hopefully this will remain quite simple, otherwise need to pull in
 241  * something like the state tracker mechanism.
 242  */
 243 void llvmpipe_update_derived( struct llvmpipe_context *llvmpipe )
 244 {
 245    struct llvmpipe_screen *lp_screen = llvmpipe_screen(llvmpipe->pipe.screen);
 246
 247    /* Check for updated textures.
 248     */
 249    if (llvmpipe->tex_timestamp != lp_screen->timestamp) {
 250       llvmpipe->tex_timestamp = lp_screen->timestamp;
 251       llvmpipe->dirty |= LP_NEW_TEXTURE;
 252    }
 253
 254    if (llvmpipe->dirty & (LP_NEW_SAMPLER |
 255                           LP_NEW_TEXTURE))
 256       update_tgsi_samplers( llvmpipe );
 257
 258    if (llvmpipe->dirty & (LP_NEW_RASTERIZER |
 259                           LP_NEW_FS |
 260                           LP_NEW_VS))
 261       invalidate_vertex_layout( llvmpipe );
 262
 263    if (llvmpipe->dirty & (LP_NEW_SCISSOR |
 264                           LP_NEW_RASTERIZER |
 265                           LP_NEW_FRAMEBUFFER))
 266       compute_cliprect(llvmpipe);
 267
 268    if (llvmpipe->dirty & (LP_NEW_FS |
 269                           LP_NEW_BLEND |
 270                           LP_NEW_DEPTH_STENCIL_ALPHA |
 271                           LP_NEW_SAMPLER |
 272                           LP_NEW_TEXTURE))
 273       llvmpipe_update_fs( llvmpipe );
 274
 275
 276    llvmpipe->dirty = 0;
 277 }