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