src/mesa/pipe/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 "pipe/draw/draw_context.h"
  31 #include "pipe/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/tgsi/exec/tgsi_token.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;
  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
  54    memset(texCoords, 0, sizeof(texCoords));
  55    memset(&vinfo, 0, sizeof(vinfo));
  56
  57    /* pos */
  58    draw_emit_vertex_attr(&vinfo, FORMAT_3F, INTERP_LINEAR);
  59    /* Note: we'll set the S4_VFMT_XYZ[W] bits below */
  60
  61    for (i = 0; i < fs->num_inputs; i++) {
  62       switch (fs->input_semantic_name[i]) {
  63       case TGSI_SEMANTIC_POSITION:
  64          break;
  65       case TGSI_SEMANTIC_COLOR:
  66          if (fs->input_semantic_index[i] == 0) {
  67             front0 = draw_emit_vertex_attr(&vinfo, FORMAT_4UB, colorInterp);
  68             vinfo.hwfmt[0] |= S4_VFMT_COLOR;
  69          }
  70          else {
  71             assert(fs->input_semantic_index[i] == 1);
  72             front1 = draw_emit_vertex_attr(&vinfo, FORMAT_4UB, colorInterp);
  73             vinfo.hwfmt[0] |= S4_VFMT_SPEC_FOG;
  74          }
  75          break;
  76       case TGSI_SEMANTIC_GENERIC:
  77          /* usually a texcoord */
  78          {
  79             const uint unit = fs->input_semantic_index[i];
  80             uint hwtc;
  81             texCoords[unit] = TRUE;
  82             draw_emit_vertex_attr(&vinfo, FORMAT_4F, INTERP_PERSPECTIVE);
  83             hwtc = TEXCOORDFMT_4D;
  84             needW = TRUE;
  85             vinfo.hwfmt[1] |= hwtc << (unit * 4);
  86          }
  87          break;
  88       case TGSI_SEMANTIC_FOG:
  89          fprintf(stderr, "i915 fogcoord not implemented yet\n");
  90          draw_emit_vertex_attr(&vinfo, FORMAT_1F, INTERP_PERSPECTIVE);
  91          break;
  92       default:
  93          assert(0);
  94       }
  95
  96    }
  97
  98    /* finish up texcoord fields */
  99    for (i = 0; i < 8; i++) {
 100       if (!texCoords[i]) {
 101          const uint hwtc = TEXCOORDFMT_NOT_PRESENT;
 102          vinfo.hwfmt[1] |= hwtc << (i* 4);
 103       }
 104    }
 105
 106    /* go back and fill in the vertex position info now that we have needW */
 107    if (needW) {
 108       vinfo.hwfmt[0] |= S4_VFMT_XYZW;
 109       vinfo.format[0] = FORMAT_4F;
 110    }
 111    else {
 112       vinfo.hwfmt[0] |= S4_VFMT_XYZ;
 113       vinfo.format[0] = FORMAT_3F;
 114    }
 115
 116    /* Additional attributes required for setup: Just twosided
 117     * lighting.  Edgeflag is dealt with specially by setting bits in
 118     * the vertex header.
 119     */
 120    if (i915->rasterizer->light_twoside) {
 121       if (front0) {
 122          back0 = draw_emit_vertex_attr(&vinfo, FORMAT_OMIT, colorInterp);
 123       }
 124       if (back0) {
 125          back1 = draw_emit_vertex_attr(&vinfo, FORMAT_OMIT, colorInterp);
 126       }
 127    }
 128
 129    draw_compute_vertex_size(&vinfo);
 130
 131    if (memcmp(&i915->current.vertex_info, &vinfo, sizeof(vinfo))) {
 132       /* If the attributes have changed, tell the draw module about the new
 133        * vertex layout.  We'll also update the hardware vertex format info.
 134        */
 135       draw_set_vertex_attributes( i915->draw,
 136                                   NULL,/*vinfo.slot_to_attrib,*/
 137                                   vinfo.interp_mode,
 138                                   vinfo.num_attribs);
 139
 140       draw_set_twoside_attributes(i915->draw,
 141                                   front0, back0, front1, back1);
 142
 143       /* Need to set this flag so that the LIS2/4 registers get set.
 144        * It also means the i915_update_immediate() function must be called
 145        * after this one, in i915_update_derived().
 146        */
 147       i915->dirty |= I915_NEW_VERTEX_FORMAT;
 148
 149       memcpy(&i915->current.vertex_info, &vinfo, sizeof(vinfo));
 150    }
 151 }
 152
 153
 154
 155
 156 /* Hopefully this will remain quite simple, otherwise need to pull in
 157  * something like the state tracker mechanism.
 158  */
 159 void i915_update_derived( struct i915_context *i915 )
 160 {
 161    if (i915->dirty & (I915_NEW_RASTERIZER | I915_NEW_FS))
 162       calculate_vertex_layout( i915 );
 163
 164    if (i915->dirty & (I915_NEW_SAMPLER | I915_NEW_TEXTURE))
 165       i915_update_samplers(i915);
 166
 167    if (i915->dirty & I915_NEW_TEXTURE)
 168       i915_update_textures(i915);
 169
 170    if (i915->dirty)
 171       i915_update_immediate( i915 );
 172
 173    if (i915->dirty)
 174       i915_update_dynamic( i915 );
 175
 176    if (i915->dirty & I915_NEW_FS) {
 177       i915_translate_fragment_program(i915);
 178       i915->hardware_dirty |= I915_HW_PROGRAM; /* XXX right? */
 179    }
 180
 181    /* HW emit currently references framebuffer state directly:
 182     */
 183    if (i915->dirty & I915_NEW_FRAMEBUFFER)
 184       i915->hardware_dirty |= I915_HW_STATIC;
 185
 186    i915->dirty = 0;
 187 }