src/gallium/drivers/llvmpipe/lp_state_derived.c

   1 /**************************************************************************
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   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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  12  * the following conditions:
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  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.
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  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    unsigned vs_index;
  54    uint i;
  55
  56    llvmpipe->color_slot[0] = ~0;
  57    llvmpipe->color_slot[1] = ~0;
  58    llvmpipe->bcolor_slot[0] = ~0;
  59    llvmpipe->bcolor_slot[1] = ~0;
  60
  61    /*
  62     * Match FS inputs against VS outputs, emitting the necessary
  63     * attributes.  Could cache these structs and look them up with a
  64     * combination of fragment shader, vertex shader ids.
  65     */
  66
  67    vinfo->num_attribs = 0;
  68
  69    vs_index = draw_find_shader_output(llvmpipe->draw,
  70                                        TGSI_SEMANTIC_POSITION,
  71                                        0);
  72
  73    draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
  74
  75    for (i = 0; i < lpfs->info.base.num_inputs; i++) {
  76       /*
  77        * Search for each input in current vs output:
  78        */
  79
  80       vs_index = draw_find_shader_output(llvmpipe->draw,
  81                                          lpfs->info.base.input_semantic_name[i],
  82                                          lpfs->info.base.input_semantic_index[i]);
  83
  84       if (lpfs->info.base.input_semantic_name[i] == TGSI_SEMANTIC_COLOR &&
  85           lpfs->info.base.input_semantic_index[i] < 2) {
  86          int idx = lpfs->info.base.input_semantic_index[i];
  87          llvmpipe->color_slot[idx] = vinfo->num_attribs;
  88       }
  89
  90       /*
  91        * Emit the requested fs attribute for all but position.
  92        */
  93       draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
  94    }
  95
  96    /* Figure out if we need bcolor as well.
  97     */
  98    for (i = 0; i < 2; i++) {
  99       vs_index = draw_find_shader_output(llvmpipe->draw,
 100                                          TGSI_SEMANTIC_BCOLOR, i);
 101
 102       if (vs_index > 0) {
 103          llvmpipe->bcolor_slot[i] = vinfo->num_attribs;
 104          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
 105       }
 106    }
 107
 108
 109    /* Figure out if we need pointsize as well.
 110     */
 111    vs_index = draw_find_shader_output(llvmpipe->draw,
 112                                       TGSI_SEMANTIC_PSIZE, 0);
 113
 114    if (vs_index > 0) {
 115       llvmpipe->psize_slot = vinfo->num_attribs;
 116       draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
 117    }
 118
 119    draw_compute_vertex_size(vinfo);
 120    lp_setup_set_vertex_info(llvmpipe->setup, vinfo);
 121 }
 122
 123
 124 /**
 125  * Handle state changes.
 126  * Called just prior to drawing anything (pipe::draw_arrays(), etc).
 127  *
 128  * Hopefully this will remain quite simple, otherwise need to pull in
 129  * something like the state tracker mechanism.
 130  */
 131 void llvmpipe_update_derived( struct llvmpipe_context *llvmpipe )
 132 {
 133    struct llvmpipe_screen *lp_screen = llvmpipe_screen(llvmpipe->pipe.screen);
 134
 135    /* Check for updated textures.
 136     */
 137    if (llvmpipe->tex_timestamp != lp_screen->timestamp) {
 138       llvmpipe->tex_timestamp = lp_screen->timestamp;
 139       llvmpipe->dirty |= LP_NEW_SAMPLER_VIEW;
 140    }
 141
 142    if (llvmpipe->dirty & (LP_NEW_RASTERIZER |
 143                           LP_NEW_FS |
 144                           LP_NEW_VS))
 145       compute_vertex_info( llvmpipe );
 146
 147    if (llvmpipe->dirty & (LP_NEW_FS |
 148                           LP_NEW_BLEND |
 149                           LP_NEW_SCISSOR |
 150                           LP_NEW_DEPTH_STENCIL_ALPHA |
 151                           LP_NEW_RASTERIZER |
 152                           LP_NEW_SAMPLER |
 153                           LP_NEW_SAMPLER_VIEW |
 154                           LP_NEW_QUERY))
 155       llvmpipe_update_fs( llvmpipe );
 156
 157    if (llvmpipe->dirty & (LP_NEW_FS |
 158                           LP_NEW_RASTERIZER))
 159       llvmpipe_update_setup( llvmpipe );
 160
 161    if (llvmpipe->dirty & LP_NEW_BLEND_COLOR)
 162       lp_setup_set_blend_color(llvmpipe->setup,
 163                                &llvmpipe->blend_color);
 164
 165    if (llvmpipe->dirty & LP_NEW_SCISSOR)
 166       lp_setup_set_scissor(llvmpipe->setup, &llvmpipe->scissor);
 167
 168    if (llvmpipe->dirty & LP_NEW_DEPTH_STENCIL_ALPHA) {
 169       lp_setup_set_alpha_ref_value(llvmpipe->setup,
 170                                    llvmpipe->depth_stencil->alpha.ref_value);
 171       lp_setup_set_stencil_ref_values(llvmpipe->setup,
 172                                       llvmpipe->stencil_ref.ref_value);
 173    }
 174
 175    if (llvmpipe->dirty & LP_NEW_CONSTANTS)
 176       lp_setup_set_fs_constants(llvmpipe->setup,
 177                                 llvmpipe->constants[PIPE_SHADER_FRAGMENT][0]);
 178
 179    if (llvmpipe->dirty & (LP_NEW_SAMPLER_VIEW))
 180       lp_setup_set_fragment_sampler_views(llvmpipe->setup,
 181                                           llvmpipe->num_fragment_sampler_views,
 182                                           llvmpipe->fragment_sampler_views);
 183
 184    if (llvmpipe->dirty & (LP_NEW_SAMPLER))
 185       lp_setup_set_fragment_sampler_state(llvmpipe->setup,
 186                                           llvmpipe->num_samplers,
 187                                           llvmpipe->sampler);
 188
 189    llvmpipe->dirty = 0;
 190 }
 191