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