1 /**************************************************************************
2 *
3 * Copyright 2003 VMware, Inc.
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 VMWARE 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_fpc.h"
37 #include "i915_reg.h"
38
find_mapping(const struct i915_fragment_shader * fs,int unit)39 static uint find_mapping(const struct i915_fragment_shader* fs, int unit)
40 {
41 int i;
42 for (i = 0; i < I915_TEX_UNITS ; i++)
43 {
44 if (fs->generic_mapping[i] == unit)
45 return i;
46 }
47 debug_printf("Mapping not found\n");
48 return 0;
49 }
50
51
52
53 /***********************************************************************
54 * Determine the hardware vertex layout.
55 * Depends on vertex/fragment shader state.
56 */
calculate_vertex_layout(struct i915_context * i915)57 static void calculate_vertex_layout(struct i915_context *i915)
58 {
59 const struct i915_fragment_shader *fs = i915->fs;
60 struct vertex_info vinfo;
61 boolean texCoords[I915_TEX_UNITS], colors[2], fog, needW, face;
62 uint i;
63 int src;
64
65 memset(texCoords, 0, sizeof(texCoords));
66 colors[0] = colors[1] = fog = needW = face = 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 {
76 uint unit = I915_SEMANTIC_POS;
77 texCoords[find_mapping(fs, unit)] = TRUE;
78 }
79 break;
80 case TGSI_SEMANTIC_COLOR:
81 assert(fs->info.input_semantic_index[i] < 2);
82 colors[fs->info.input_semantic_index[i]] = TRUE;
83 break;
84 case TGSI_SEMANTIC_GENERIC:
85 {
86 /* texcoords/varyings/other generic */
87 uint unit = fs->info.input_semantic_index[i];
88
89 texCoords[find_mapping(fs, unit)] = TRUE;
90 needW = TRUE;
91 }
92 break;
93 case TGSI_SEMANTIC_FOG:
94 fog = TRUE;
95 break;
96 case TGSI_SEMANTIC_FACE:
97 face = TRUE;
98 break;
99 default:
100 debug_printf("Unknown input type %d\n", fs->info.input_semantic_name[i]);
101 assert(0);
102 }
103 }
104
105
106 /* pos */
107 src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_POSITION, 0);
108 if (needW) {
109 draw_emit_vertex_attr(&vinfo, EMIT_4F, src);
110 vinfo.hwfmt[0] |= S4_VFMT_XYZW;
111 vinfo.attrib[0].emit = EMIT_4F;
112 }
113 else {
114 draw_emit_vertex_attr(&vinfo, EMIT_3F, src);
115 vinfo.hwfmt[0] |= S4_VFMT_XYZ;
116 vinfo.attrib[0].emit = EMIT_3F;
117 }
118
119 /* hardware point size */
120 /* XXX todo */
121
122 /* primary color */
123 if (colors[0]) {
124 src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_COLOR, 0);
125 draw_emit_vertex_attr(&vinfo, EMIT_4UB_BGRA, src);
126 vinfo.hwfmt[0] |= S4_VFMT_COLOR;
127 }
128
129 /* secondary color */
130 if (colors[1]) {
131 src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_COLOR, 1);
132 draw_emit_vertex_attr(&vinfo, EMIT_4UB_BGRA, src);
133 vinfo.hwfmt[0] |= S4_VFMT_SPEC_FOG;
134 }
135
136 /* fog coord, not fog blend factor */
137 if (fog) {
138 src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_FOG, 0);
139 draw_emit_vertex_attr(&vinfo, EMIT_1F, src);
140 vinfo.hwfmt[0] |= S4_VFMT_FOG_PARAM;
141 }
142
143 /* texcoords/varyings */
144 for (i = 0; i < I915_TEX_UNITS; i++) {
145 uint hwtc;
146 if (texCoords[i]) {
147 hwtc = TEXCOORDFMT_4D;
148 if (fs->generic_mapping[i] == I915_SEMANTIC_POS) {
149 src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_POSITION, 0);
150 }
151 else {
152 src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_GENERIC, fs->generic_mapping[i]);
153 }
154 draw_emit_vertex_attr(&vinfo, EMIT_4F, src);
155 }
156 else {
157 hwtc = TEXCOORDFMT_NOT_PRESENT;
158 }
159 vinfo.hwfmt[1] |= hwtc << (i * 4);
160 }
161
162 /* front/back face */
163 if (face) {
164 uint slot = find_mapping(fs, I915_SEMANTIC_FACE);
165 debug_printf("Front/back face is broken\n");
166 /* XXX Because of limitations in the draw module, currently src will be 0
167 * for SEMANTIC_FACE, so this aliases to POS. We need to fix in the draw
168 * module by adding an extra shader output.
169 */
170 src = draw_find_shader_output(i915->draw, TGSI_SEMANTIC_FACE, 0);
171 draw_emit_vertex_attr(&vinfo, EMIT_1F, src);
172 vinfo.hwfmt[1] &= ~(TEXCOORDFMT_NOT_PRESENT << (slot * 4));
173 vinfo.hwfmt[1] |= TEXCOORDFMT_1D << (slot * 4);
174 }
175
176 draw_compute_vertex_size(&vinfo);
177
178 if (memcmp(&i915->current.vertex_info, &vinfo, sizeof(vinfo))) {
179 /* Need to set this flag so that the LIS2/4 registers get set.
180 * It also means the i915_update_immediate() function must be called
181 * after this one, in i915_update_derived().
182 */
183 i915->dirty |= I915_NEW_VERTEX_FORMAT;
184
185 memcpy(&i915->current.vertex_info, &vinfo, sizeof(vinfo));
186 }
187 }
188
189 struct i915_tracked_state i915_update_vertex_layout = {
190 "vertex_layout",
191 calculate_vertex_layout,
192 I915_NEW_RASTERIZER | I915_NEW_FS | I915_NEW_VS
193 };
194
195
196
197 /***********************************************************************
198 */
199 static struct i915_tracked_state *atoms[] = {
200 &i915_update_vertex_layout,
201 &i915_hw_samplers,
202 &i915_hw_sampler_views,
203 &i915_hw_immediate,
204 &i915_hw_dynamic,
205 &i915_hw_fs,
206 &i915_hw_framebuffer,
207 &i915_hw_dst_buf_vars,
208 &i915_hw_constants,
209 NULL,
210 };
211
i915_update_derived(struct i915_context * i915)212 void i915_update_derived(struct i915_context *i915)
213 {
214 int i;
215
216 if (I915_DBG_ON(DBG_ATOMS))
217 i915_dump_dirty(i915, __FUNCTION__);
218
219 for (i = 0; atoms[i]; i++)
220 if (atoms[i]->dirty & i915->dirty)
221 atoms[i]->update(i915);
222
223 i915->dirty = 0;
224 }
225