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