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
  39
  40 /***********************************************************************
  41  * Determine the hardware vertex layout.
  42  * Depends on vertex/fragment shader state.
  43  */
  44 static void calculate_vertex_layout(struct i915_context *i915)
  45 {
  46    const struct i915_fragment_shader *fs = i915->fs;
  47    const enum interp_mode colorInterp = i915->rasterizer->color_interp;
  48    struct vertex_info vinfo;
  49    boolean texCoords[8], colors[2], fog, needW;
  50    uint i;
  51    int src;
  52
  53    memset(texCoords, 0, sizeof(texCoords));
  54    colors[0] = colors[1] = fog = needW = FALSE;
  55    memset(&vinfo, 0, sizeof(vinfo));
  56
  57    /* Determine which fragment program inputs are needed.  Setup HW vertex
  58     * layout below, in the HW-specific attribute order.
  59     */
  60    for (i = 0; i < fs->info.num_inputs; i++) {
  61       switch (fs->info.input_semantic_name[i]) {
  62       case TGSI_SEMANTIC_POSITION:
  63          break;
  64       case TGSI_SEMANTIC_COLOR:
  65          assert(fs->info.input_semantic_index[i] < 2);
  66          colors[fs->info.input_semantic_index[i]] = TRUE;
  67          break;
  68       case TGSI_SEMANTIC_GENERIC:
  69          /* usually a texcoord */
  70          {
  71             const uint unit = fs->info.input_semantic_index[i];
  72             assert(unit < 8);
  73             texCoords[unit] = TRUE;
  74             needW = TRUE;
  75          }
  76          break;
  77       case TGSI_SEMANTIC_FOG:
  78          fog = TRUE;
  79          break;
  80       default:
  81          assert(0);
  82       }
  83    }
  84
  85
  86    /* pos */
  87    src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_POSITION, 0);
  88    if (needW) {
  89       draw_emit_vertex_attr(&vinfo, EMIT_4F, INTERP_LINEAR, src);
  90       vinfo.hwfmt[0] |= S4_VFMT_XYZW;
  91       vinfo.attrib[0].emit = EMIT_4F;
  92    }
  93    else {
  94       draw_emit_vertex_attr(&vinfo, EMIT_3F, INTERP_LINEAR, src);
  95       vinfo.hwfmt[0] |= S4_VFMT_XYZ;
  96       vinfo.attrib[0].emit = EMIT_3F;
  97    }
  98
  99    /* hardware point size */
 100    /* XXX todo */
 101
 102    /* primary color */
 103    if (colors[0]) {
 104       src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_COLOR, 0);
 105       draw_emit_vertex_attr(&vinfo, EMIT_4UB_BGRA, colorInterp, src);
 106       vinfo.hwfmt[0] |= S4_VFMT_COLOR;
 107    }
 108
 109    /* secondary color */
 110    if (colors[1]) {
 111       src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_COLOR, 1);
 112       draw_emit_vertex_attr(&vinfo, EMIT_4UB_BGRA, colorInterp, src);
 113       vinfo.hwfmt[0] |= S4_VFMT_SPEC_FOG;
 114    }
 115
 116    /* fog coord, not fog blend factor */
 117    if (fog) {
 118       src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_FOG, 0);
 119       draw_emit_vertex_attr(&vinfo, EMIT_1F, INTERP_PERSPECTIVE, src);
 120       vinfo.hwfmt[0] |= S4_VFMT_FOG_PARAM;
 121    }
 122
 123    /* texcoords */
 124    for (i = 0; i < 8; i++) {
 125       uint hwtc;
 126       if (texCoords[i]) {
 127          hwtc = TEXCOORDFMT_4D;
 128          src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_GENERIC, i);
 129          draw_emit_vertex_attr(&vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
 130       }
 131       else {
 132          hwtc = TEXCOORDFMT_NOT_PRESENT;
 133       }
 134       vinfo.hwfmt[1] |= hwtc << (i * 4);
 135    }
 136
 137    draw_compute_vertex_size(&vinfo);
 138
 139    if (memcmp(&i915->current.vertex_info, &vinfo, sizeof(vinfo))) {
 140       /* Need to set this flag so that the LIS2/4 registers get set.
 141        * It also means the i915_update_immediate() function must be called
 142        * after this one, in i915_update_derived().
 143        */
 144       i915->dirty |= I915_NEW_VERTEX_FORMAT;
 145
 146       memcpy(&i915->current.vertex_info, &vinfo, sizeof(vinfo));
 147    }
 148 }
 149
 150 struct i915_tracked_state i915_update_vertex_layout = {
 151    "vertex_layout",
 152    calculate_vertex_layout,
 153    I915_NEW_RASTERIZER | I915_NEW_FS | I915_NEW_VS
 154 };
 155
 156
 157
 158 /***********************************************************************
 159  */
 160 static struct i915_tracked_state *atoms[] = {
 161    &i915_update_vertex_layout,
 162    &i915_hw_samplers,
 163    &i915_hw_sampler_views,
 164    &i915_hw_immediate,
 165    &i915_hw_dynamic,
 166    &i915_hw_fs,
 167    &i915_hw_framebuffer,
 168    &i915_hw_constants,
 169    NULL,
 170 };
 171
 172 void i915_update_derived(struct i915_context *i915)
 173 {
 174    int i;
 175
 176    if (I915_DBG_ON(DBG_ATOMS))
 177       i915_dump_dirty(i915, __FUNCTION__);
 178
 179    for (i = 0; atoms[i]; i++)
 180       if (atoms[i]->dirty & i915->dirty)
 181          atoms[i]->update(i915);
 182
 183    i915->dirty = 0;
 184 }