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_setup.h"
  37 #include "lp_state.h"
  38
  39
  40
  41 /**
  42  * The vertex info describes how to convert the post-transformed vertices
  43  * (simple float[][4]) used by the 'draw' module into vertices for
  44  * rasterization.
  45  *
  46  * This function validates the vertex layout.
  47  */
  48 static void
  49 compute_vertex_info(struct llvmpipe_context *llvmpipe)
  50 {
  51    const struct lp_fragment_shader *lpfs = llvmpipe->fs;
  52    struct vertex_info *vinfo = &llvmpipe->vertex_info;
  53    int vs_index;
  54    uint i;
  55
  56    draw_prepare_shader_outputs(llvmpipe->draw);
  57
  58    llvmpipe->color_slot[0] = -1;
  59    llvmpipe->color_slot[1] = -1;
  60    llvmpipe->bcolor_slot[0] = -1;
  61    llvmpipe->bcolor_slot[1] = -1;
  62
  63    /*
  64     * Match FS inputs against VS outputs, emitting the necessary
  65     * attributes.  Could cache these structs and look them up with a
  66     * combination of fragment shader, vertex shader ids.
  67     */
  68
  69    vinfo->num_attribs = 0;
  70
  71    vs_index = draw_find_shader_output(llvmpipe->draw,
  72                                       TGSI_SEMANTIC_POSITION,
  73                                       0);
  74
  75    draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
  76
  77    for (i = 0; i < lpfs->info.base.num_inputs; i++) {
  78       /*
  79        * Search for each input in current vs output:
  80        */
  81
  82       vs_index = draw_find_shader_output(llvmpipe->draw,
  83                                          lpfs->info.base.input_semantic_name[i],
  84                                          lpfs->info.base.input_semantic_index[i]);
  85
  86       if (lpfs->info.base.input_semantic_name[i] == TGSI_SEMANTIC_COLOR &&
  87           lpfs->info.base.input_semantic_index[i] < 2) {
  88          int idx = lpfs->info.base.input_semantic_index[i];
  89          llvmpipe->color_slot[idx] = (int)vinfo->num_attribs;
  90       }
  91
  92       if (lpfs->info.base.input_semantic_name[i] == TGSI_SEMANTIC_FACE) {
  93          llvmpipe->face_slot = vinfo->num_attribs;
  94          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
  95       } else if (lpfs->info.base.input_semantic_name[i] == TGSI_SEMANTIC_PRIMID) {
  96          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
  97       } else {
  98          /*
  99           * Emit the requested fs attribute for all but position.
 100           */
 101          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
 102       }
 103    }
 104    /* Figure out if we need bcolor as well.
 105     */
 106    for (i = 0; i < 2; i++) {
 107       vs_index = draw_find_shader_output(llvmpipe->draw,
 108                                          TGSI_SEMANTIC_BCOLOR, i);
 109
 110       if (vs_index >= 0) {
 111          llvmpipe->bcolor_slot[i] = (int)vinfo->num_attribs;
 112          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
 113       }
 114    }
 115
 116
 117    /* Figure out if we need pointsize as well.
 118     */
 119    vs_index = draw_find_shader_output(llvmpipe->draw,
 120                                       TGSI_SEMANTIC_PSIZE, 0);
 121
 122    if (vs_index >= 0) {
 123       llvmpipe->psize_slot = vinfo->num_attribs;
 124       draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
 125    }
 126
 127    /* Figure out if we need viewport index */
 128    vs_index = draw_find_shader_output(llvmpipe->draw,
 129                                       TGSI_SEMANTIC_VIEWPORT_INDEX,
 130                                       0);
 131    if (vs_index >= 0) {
 132       llvmpipe->viewport_index_slot = vinfo->num_attribs;
 133       draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
 134    } else {
 135       llvmpipe->viewport_index_slot = 0;
 136    }
 137
 138    /* Figure out if we need layer */
 139    vs_index = draw_find_shader_output(llvmpipe->draw,
 140                                       TGSI_SEMANTIC_LAYER,
 141                                       0);
 142    if (vs_index >= 0) {
 143       llvmpipe->layer_slot = vinfo->num_attribs;
 144       draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
 145    } else {
 146       llvmpipe->layer_slot = 0;
 147    }
 148
 149    draw_compute_vertex_size(vinfo);
 150    lp_setup_set_vertex_info(llvmpipe->setup, vinfo);
 151 }
 152
 153
 154 /**
 155  * Handle state changes.
 156  * Called just prior to drawing anything (pipe::draw_arrays(), etc).
 157  *
 158  * Hopefully this will remain quite simple, otherwise need to pull in
 159  * something like the state tracker mechanism.
 160  */
 161 void llvmpipe_update_derived( struct llvmpipe_context *llvmpipe )
 162 {
 163    struct llvmpipe_screen *lp_screen = llvmpipe_screen(llvmpipe->pipe.screen);
 164
 165    /* Check for updated textures.
 166     */
 167    if (llvmpipe->tex_timestamp != lp_screen->timestamp) {
 168       llvmpipe->tex_timestamp = lp_screen->timestamp;
 169       llvmpipe->dirty |= LP_NEW_SAMPLER_VIEW;
 170    }
 171
 172    if (llvmpipe->dirty & (LP_NEW_RASTERIZER |
 173                           LP_NEW_FS |
 174                           LP_NEW_VS))
 175       compute_vertex_info( llvmpipe );
 176
 177    if (llvmpipe->dirty & (LP_NEW_FS |
 178                           LP_NEW_FRAMEBUFFER |
 179                           LP_NEW_BLEND |
 180                           LP_NEW_SCISSOR |
 181                           LP_NEW_DEPTH_STENCIL_ALPHA |
 182                           LP_NEW_RASTERIZER |
 183                           LP_NEW_SAMPLER |
 184                           LP_NEW_SAMPLER_VIEW |
 185                           LP_NEW_OCCLUSION_QUERY))
 186       llvmpipe_update_fs( llvmpipe );
 187
 188    if (llvmpipe->dirty & (LP_NEW_FS |
 189                           LP_NEW_FRAMEBUFFER |
 190                           LP_NEW_RASTERIZER))
 191       llvmpipe_update_setup( llvmpipe );
 192
 193    if (llvmpipe->dirty & LP_NEW_BLEND_COLOR)
 194       lp_setup_set_blend_color(llvmpipe->setup,
 195                                &llvmpipe->blend_color);
 196
 197    if (llvmpipe->dirty & LP_NEW_SCISSOR)
 198       lp_setup_set_scissors(llvmpipe->setup, llvmpipe->scissors);
 199
 200    if (llvmpipe->dirty & LP_NEW_DEPTH_STENCIL_ALPHA) {
 201       lp_setup_set_alpha_ref_value(llvmpipe->setup,
 202                                    llvmpipe->depth_stencil->alpha.ref_value);
 203       lp_setup_set_stencil_ref_values(llvmpipe->setup,
 204                                       llvmpipe->stencil_ref.ref_value);
 205    }
 206
 207    if (llvmpipe->dirty & LP_NEW_CONSTANTS)
 208       lp_setup_set_fs_constants(llvmpipe->setup,
 209                                 Elements(llvmpipe->constants[PIPE_SHADER_FRAGMENT]),
 210                                 llvmpipe->constants[PIPE_SHADER_FRAGMENT]);
 211
 212    if (llvmpipe->dirty & (LP_NEW_SAMPLER_VIEW))
 213       lp_setup_set_fragment_sampler_views(llvmpipe->setup,
 214                                           llvmpipe->num_sampler_views[PIPE_SHADER_FRAGMENT],
 215                                           llvmpipe->sampler_views[PIPE_SHADER_FRAGMENT]);
 216
 217    if (llvmpipe->dirty & (LP_NEW_SAMPLER))
 218       lp_setup_set_fragment_sampler_state(llvmpipe->setup,
 219                                           llvmpipe->num_samplers[PIPE_SHADER_FRAGMENT],
 220                                           llvmpipe->samplers[PIPE_SHADER_FRAGMENT]);
 221
 222    llvmpipe->dirty = 0;
 223 }
 224