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_debug.h"
  36 #include "i915_reg.h"
  37
  38 static uint find_mapping(struct i915_fragment_shader* fs, int unit)
  39 {
  40    int i;
  41    for (i = 0; i < I915_TEX_UNITS ; i++)
  42    {
  43       if (fs->generic_mapping[i] == unit)
  44          return i;
  45    }
  46    debug_printf("Mapping not found\n");
  47    return 0;
  48 }
  49
  50
  51
  52 /***********************************************************************
  53  * Determine the hardware vertex layout.
  54  * Depends on vertex/fragment shader state.
  55  */
  56 static void calculate_vertex_layout(struct i915_context *i915)
  57 {
  58    const struct i915_fragment_shader *fs = i915->fs;
  59    const enum interp_mode colorInterp = i915->rasterizer->color_interp;
  60    struct vertex_info vinfo;
  61    boolean texCoords[I915_TEX_UNITS], colors[2], fog, needW;
  62    uint i;
  63    int src;
  64
  65    memset(texCoords, 0, sizeof(texCoords));
  66    colors[0] = colors[1] = fog = needW = FALSE;
  67    memset(&vinfo, 0, sizeof(vinfo));
  68
  69    /* Determine which fragment program inputs are needed.  Setup HW vertex
  70     * layout below, in the HW-specific attribute order.
  71     */
  72    for (i = 0; i < fs->info.num_inputs; i++) {
  73       switch (fs->info.input_semantic_name[i]) {
  74       case TGSI_SEMANTIC_POSITION:
  75          break;
  76       case TGSI_SEMANTIC_COLOR:
  77          assert(fs->info.input_semantic_index[i] < 2);
  78          colors[fs->info.input_semantic_index[i]] = TRUE;
  79          break;
  80       case TGSI_SEMANTIC_GENERIC:
  81          {
  82             /* texcoords/varyings/other generic */
  83             /* XXX handle back/front face and point size */
  84             uint unit = fs->info.input_semantic_index[i];
  85
  86             texCoords[find_mapping(fs, unit)] = TRUE;
  87             needW = TRUE;
  88          }
  89          break;
  90       case TGSI_SEMANTIC_FOG:
  91          fog = TRUE;
  92          break;
  93       default:
  94          assert(0);
  95       }
  96    }
  97
  98
  99    /* pos */
 100    src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_POSITION, 0);
 101    if (needW) {
 102       draw_emit_vertex_attr(&vinfo, EMIT_4F, INTERP_LINEAR, src);
 103       vinfo.hwfmt[0] |= S4_VFMT_XYZW;
 104       vinfo.attrib[0].emit = EMIT_4F;
 105    }
 106    else {
 107       draw_emit_vertex_attr(&vinfo, EMIT_3F, INTERP_LINEAR, src);
 108       vinfo.hwfmt[0] |= S4_VFMT_XYZ;
 109       vinfo.attrib[0].emit = EMIT_3F;
 110    }
 111
 112    /* hardware point size */
 113    /* XXX todo */
 114
 115    /* primary color */
 116    if (colors[0]) {
 117       src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_COLOR, 0);
 118       draw_emit_vertex_attr(&vinfo, EMIT_4UB_BGRA, colorInterp, src);
 119       vinfo.hwfmt[0] |= S4_VFMT_COLOR;
 120    }
 121
 122    /* secondary color */
 123    if (colors[1]) {
 124       src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_COLOR, 1);
 125       draw_emit_vertex_attr(&vinfo, EMIT_4UB_BGRA, colorInterp, src);
 126       vinfo.hwfmt[0] |= S4_VFMT_SPEC_FOG;
 127    }
 128
 129    /* fog coord, not fog blend factor */
 130    if (fog) {
 131       src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_FOG, 0);
 132       draw_emit_vertex_attr(&vinfo, EMIT_1F, INTERP_PERSPECTIVE, src);
 133       vinfo.hwfmt[0] |= S4_VFMT_FOG_PARAM;
 134    }
 135
 136    /* texcoords/varyings */
 137    for (i = 0; i < I915_TEX_UNITS; i++) {
 138       uint hwtc;
 139       if (texCoords[i]) {
 140          hwtc = TEXCOORDFMT_4D;
 141          src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_GENERIC, fs->generic_mapping[i]);
 142          draw_emit_vertex_attr(&vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
 143       }
 144       else {
 145          hwtc = TEXCOORDFMT_NOT_PRESENT;
 146       }
 147       vinfo.hwfmt[1] |= hwtc << (i * 4);
 148    }
 149
 150    draw_compute_vertex_size(&vinfo);
 151
 152    if (memcmp(&i915->current.vertex_info, &vinfo, sizeof(vinfo))) {
 153       /* Need to set this flag so that the LIS2/4 registers get set.
 154        * It also means the i915_update_immediate() function must be called
 155        * after this one, in i915_update_derived().
 156        */
 157       i915->dirty |= I915_NEW_VERTEX_FORMAT;
 158
 159       memcpy(&i915->current.vertex_info, &vinfo, sizeof(vinfo));
 160    }
 161 }
 162
 163 struct i915_tracked_state i915_update_vertex_layout = {
 164    "vertex_layout",
 165    calculate_vertex_layout,
 166    I915_NEW_RASTERIZER | I915_NEW_FS | I915_NEW_VS
 167 };
 168
 169
 170
 171 /***********************************************************************
 172  */
 173 static struct i915_tracked_state *atoms[] = {
 174    &i915_update_vertex_layout,
 175    &i915_hw_samplers,
 176    &i915_hw_sampler_views,
 177    &i915_hw_immediate,
 178    &i915_hw_dynamic,
 179    &i915_hw_fs,
 180    &i915_hw_framebuffer,
 181    &i915_hw_dst_buf_vars,
 182    &i915_hw_constants,
 183    NULL,
 184 };
 185
 186 void i915_update_derived(struct i915_context *i915)
 187 {
 188    int i;
 189
 190    if (I915_DBG_ON(DBG_ATOMS))
 191       i915_dump_dirty(i915, __FUNCTION__);
 192
 193    for (i = 0; atoms[i]; i++)
 194       if (atoms[i]->dirty & i915->dirty)
 195          atoms[i]->update(i915);
 196
 197    i915->dirty = 0;
 198 }