i915_state_derived.c revision abb436526974bd090853c0927ece0839f9143393 
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
38static 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 */
56static 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
163struct 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 */
173static 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
186void 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}
199