src/gallium/drivers/i915simple/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 "pipe/p_util.h"
  30 #include "draw/draw_context.h"
  31 #include "draw/draw_vertex.h"
  32 #include "i915_context.h"
  33 #include "i915_state.h"
  34 #include "i915_reg.h"
  35 #include "i915_fpc.h"
  36 #include "pipe/p_shader_tokens.h"
  37
  38
  39 /**
  40  * Determine which post-transform / pre-rasterization vertex attributes
  41  * we need.
  42  * Derived from:  fs, setup states.
  43  */
  44 static void calculate_vertex_layout( struct i915_context *i915 )
  45 {
  46    const struct pipe_shader_state *fs = &i915->fs->state;
  47    const enum interp_mode colorInterp = i915->rasterizer->color_interp;
  48    struct vertex_info vinfo;
  49    uint front0 = 0, back0 = 0, front1 = 0, back1 = 0;
  50    boolean needW = 0;
  51    uint i;
  52    boolean texCoords[8];
  53    uint src = 0;
  54
  55    memset(texCoords, 0, sizeof(texCoords));
  56    memset(&vinfo, 0, sizeof(vinfo));
  57
  58    /* pos */
  59    draw_emit_vertex_attr(&vinfo, EMIT_3F, INTERP_LINEAR, src++);
  60    /* Note: we'll set the S4_VFMT_XYZ[W] bits below */
  61
  62    for (i = 0; i < fs->num_inputs; i++) {
  63       switch (fs->input_semantic_name[i]) {
  64       case TGSI_SEMANTIC_POSITION:
  65          break;
  66       case TGSI_SEMANTIC_COLOR:
  67          if (fs->input_semantic_index[i] == 0) {
  68             front0 = draw_emit_vertex_attr(&vinfo, EMIT_4UB, colorInterp, src++);
  69             vinfo.hwfmt[0] |= S4_VFMT_COLOR;
  70          }
  71          else {
  72             assert(fs->input_semantic_index[i] == 1);
  73             front1 = draw_emit_vertex_attr(&vinfo, EMIT_4UB, colorInterp, src++);
  74             vinfo.hwfmt[0] |= S4_VFMT_SPEC_FOG;
  75          }
  76          break;
  77       case TGSI_SEMANTIC_GENERIC:
  78          /* usually a texcoord */
  79          {
  80             const uint unit = fs->input_semantic_index[i];
  81             uint hwtc;
  82             texCoords[unit] = TRUE;
  83             draw_emit_vertex_attr(&vinfo, EMIT_4F, INTERP_PERSPECTIVE, src++);
  84             hwtc = TEXCOORDFMT_4D;
  85             needW = TRUE;
  86             vinfo.hwfmt[1] |= hwtc << (unit * 4);
  87          }
  88          break;
  89       case TGSI_SEMANTIC_FOG:
  90          debug_printf("i915 fogcoord not implemented yet\n");
  91          draw_emit_vertex_attr(&vinfo, EMIT_1F, INTERP_PERSPECTIVE, src++);
  92          break;
  93       default:
  94          assert(0);
  95       }
  96
  97    }
  98
  99    /* finish up texcoord fields */
 100    for (i = 0; i < 8; i++) {
 101       if (!texCoords[i]) {
 102          const uint hwtc = TEXCOORDFMT_NOT_PRESENT;
 103          vinfo.hwfmt[1] |= hwtc << (i* 4);
 104       }
 105    }
 106
 107    /* go back and fill in the vertex position info now that we have needW */
 108    if (needW) {
 109       vinfo.hwfmt[0] |= S4_VFMT_XYZW;
 110       vinfo.emit[0] = EMIT_4F;
 111    }
 112    else {
 113       vinfo.hwfmt[0] |= S4_VFMT_XYZ;
 114       vinfo.emit[0] = EMIT_3F;
 115    }
 116
 117    /* Additional attributes required for setup: Just twosided
 118     * lighting.  Edgeflag is dealt with specially by setting bits in
 119     * the vertex header.
 120     */
 121    if (i915->rasterizer->light_twoside) {
 122       if (front0) {
 123          back0 = draw_emit_vertex_attr(&vinfo, EMIT_OMIT, colorInterp, src++);
 124       }
 125       if (back0) {
 126          back1 = draw_emit_vertex_attr(&vinfo, EMIT_OMIT, colorInterp, src++);
 127       }
 128    }
 129
 130    draw_compute_vertex_size(&vinfo);
 131
 132    if (memcmp(&i915->current.vertex_info, &vinfo, sizeof(vinfo))) {
 133       /* Need to set this flag so that the LIS2/4 registers get set.
 134        * It also means the i915_update_immediate() function must be called
 135        * after this one, in i915_update_derived().
 136        */
 137       i915->dirty |= I915_NEW_VERTEX_FORMAT;
 138
 139       memcpy(&i915->current.vertex_info, &vinfo, sizeof(vinfo));
 140    }
 141 }
 142
 143
 144
 145
 146 /* Hopefully this will remain quite simple, otherwise need to pull in
 147  * something like the state tracker mechanism.
 148  */
 149 void i915_update_derived( struct i915_context *i915 )
 150 {
 151    if (i915->dirty & (I915_NEW_RASTERIZER | I915_NEW_FS))
 152       calculate_vertex_layout( i915 );
 153
 154    if (i915->dirty & (I915_NEW_SAMPLER | I915_NEW_TEXTURE))
 155       i915_update_samplers(i915);
 156
 157    if (i915->dirty & I915_NEW_TEXTURE)
 158       i915_update_textures(i915);
 159
 160    if (i915->dirty)
 161       i915_update_immediate( i915 );
 162
 163    if (i915->dirty)
 164       i915_update_dynamic( i915 );
 165
 166    if (i915->dirty & I915_NEW_FS) {
 167       i915->hardware_dirty |= I915_HW_PROGRAM; /* XXX right? */
 168    }
 169
 170    /* HW emit currently references framebuffer state directly:
 171     */
 172    if (i915->dirty & I915_NEW_FRAMEBUFFER)
 173       i915->hardware_dirty |= I915_HW_STATIC;
 174
 175    i915->dirty = 0;
 176 }