src/gallium/drivers/i915/i915_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
  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 "i915_context.h"
  34 #include "i915_state.h"
  35 #include "i915_reg.h"
  36
  37
  38
  39 /**
  40  * Determine the hardware vertex layout.
  41  * Depends on vertex/fragment shader state.
  42  */
  43 static void calculate_vertex_layout( struct i915_context *i915 )
  44 {
  45    const struct i915_fragment_shader *fs = i915->fs;
  46    const enum interp_mode colorInterp = i915->rasterizer->color_interp;
  47    struct vertex_info vinfo;
  48    boolean texCoords[8], colors[2], fog, needW;
  49    uint i;
  50    int src;
  51
  52    memset(texCoords, 0, sizeof(texCoords));
  53    colors[0] = colors[1] = fog = needW = FALSE;
  54    memset(&vinfo, 0, sizeof(vinfo));
  55
  56    /* Determine which fragment program inputs are needed.  Setup HW vertex
  57     * layout below, in the HW-specific attribute order.
  58     */
  59    for (i = 0; i < fs->info.num_inputs; i++) {
  60       switch (fs->info.input_semantic_name[i]) {
  61       case TGSI_SEMANTIC_POSITION:
  62          break;
  63       case TGSI_SEMANTIC_COLOR:
  64          assert(fs->info.input_semantic_index[i] < 2);
  65          colors[fs->info.input_semantic_index[i]] = TRUE;
  66          break;
  67       case TGSI_SEMANTIC_GENERIC:
  68          /* usually a texcoord */
  69          {
  70             const uint unit = fs->info.input_semantic_index[i];
  71             assert(unit < 8);
  72             texCoords[unit] = TRUE;
  73             needW = TRUE;
  74          }
  75          break;
  76       case TGSI_SEMANTIC_FOG:
  77          fog = TRUE;
  78          break;
  79       default:
  80          assert(0);
  81       }
  82    }
  83
  84
  85    /* pos */
  86    src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_POSITION, 0);
  87    if (needW) {
  88       draw_emit_vertex_attr(&vinfo, EMIT_4F, INTERP_LINEAR, src);
  89       vinfo.hwfmt[0] |= S4_VFMT_XYZW;
  90       vinfo.attrib[0].emit = EMIT_4F;
  91    }
  92    else {
  93       draw_emit_vertex_attr(&vinfo, EMIT_3F, INTERP_LINEAR, src);
  94       vinfo.hwfmt[0] |= S4_VFMT_XYZ;
  95       vinfo.attrib[0].emit = EMIT_3F;
  96    }
  97
  98    /* hardware point size */
  99    /* XXX todo */
 100
 101    /* primary color */
 102    if (colors[0]) {
 103       src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_COLOR, 0);
 104       draw_emit_vertex_attr(&vinfo, EMIT_4UB, colorInterp, src);
 105       vinfo.hwfmt[0] |= S4_VFMT_COLOR;
 106    }
 107
 108    /* secondary color */
 109    if (colors[1]) {
 110       src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_COLOR, 1);
 111       draw_emit_vertex_attr(&vinfo, EMIT_4UB, colorInterp, src);
 112       vinfo.hwfmt[0] |= S4_VFMT_SPEC_FOG;
 113    }
 114
 115    /* fog coord, not fog blend factor */
 116    if (fog) {
 117       src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_FOG, 0);
 118       draw_emit_vertex_attr(&vinfo, EMIT_1F, INTERP_PERSPECTIVE, src);
 119       vinfo.hwfmt[0] |= S4_VFMT_FOG_PARAM;
 120    }
 121
 122    /* texcoords */
 123    for (i = 0; i < 8; i++) {
 124       uint hwtc;
 125       if (texCoords[i]) {
 126          hwtc = TEXCOORDFMT_4D;
 127          src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_GENERIC, i);
 128          draw_emit_vertex_attr(&vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
 129       }
 130       else {
 131          hwtc = TEXCOORDFMT_NOT_PRESENT;
 132       }
 133       vinfo.hwfmt[1] |= hwtc << (i * 4);
 134    }
 135
 136    draw_compute_vertex_size(&vinfo);
 137
 138    if (memcmp(&i915->current.vertex_info, &vinfo, sizeof(vinfo))) {
 139       /* Need to set this flag so that the LIS2/4 registers get set.
 140        * It also means the i915_update_immediate() function must be called
 141        * after this one, in i915_update_derived().
 142        */
 143       i915->dirty |= I915_NEW_VERTEX_FORMAT;
 144
 145       memcpy(&i915->current.vertex_info, &vinfo, sizeof(vinfo));
 146    }
 147 }
 148
 149
 150
 151
 152 /* Hopefully this will remain quite simple, otherwise need to pull in
 153  * something like the state tracker mechanism.
 154  */
 155 void i915_update_derived( struct i915_context *i915 )
 156 {
 157    if (i915->dirty & (I915_NEW_RASTERIZER | I915_NEW_FS | I915_NEW_VS))
 158       calculate_vertex_layout( i915 );
 159
 160    if (i915->dirty & (I915_NEW_SAMPLER | I915_NEW_SAMPLER_VIEW))
 161       i915_update_samplers(i915);
 162
 163    if (i915->dirty & I915_NEW_SAMPLER_VIEW)
 164       i915_update_textures(i915);
 165
 166    if (i915->dirty)
 167       i915_update_immediate( i915 );
 168
 169    if (i915->dirty)
 170       i915_update_dynamic( i915 );
 171
 172    if (i915->dirty & I915_NEW_FS) {
 173       i915->hardware_dirty |= I915_HW_PROGRAM; /* XXX right? */
 174    }
 175
 176    /* HW emit currently references framebuffer state directly:
 177     */
 178    if (i915->dirty & I915_NEW_FRAMEBUFFER)
 179       i915->hardware_dirty |= I915_HW_STATIC;
 180
 181    i915->dirty = 0;
 182 }