1 /*
2 * Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.com>
3 * Copyright 2009 Marek Olšák <maraeo@gmail.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22 * USE OR OTHER DEALINGS IN THE SOFTWARE. */
23
24 #include "r300_vs.h"
25
26 #include "r300_context.h"
27 #include "r300_screen.h"
28 #include "r300_tgsi_to_rc.h"
29 #include "r300_reg.h"
30
31 #include "tgsi/tgsi_dump.h"
32 #include "tgsi/tgsi_parse.h"
33 #include "tgsi/tgsi_ureg.h"
34
35 #include "compiler/radeon_compiler.h"
36
37 /* Convert info about VS output semantics into r300_shader_semantics. */
r300_shader_read_vs_outputs(struct r300_context * r300,struct tgsi_shader_info * info,struct r300_shader_semantics * vs_outputs)38 static void r300_shader_read_vs_outputs(
39 struct r300_context *r300,
40 struct tgsi_shader_info* info,
41 struct r300_shader_semantics* vs_outputs)
42 {
43 int i;
44 unsigned index;
45
46 r300_shader_semantics_reset(vs_outputs);
47
48 for (i = 0; i < info->num_outputs; i++) {
49 index = info->output_semantic_index[i];
50
51 switch (info->output_semantic_name[i]) {
52 case TGSI_SEMANTIC_POSITION:
53 assert(index == 0);
54 vs_outputs->pos = i;
55 break;
56
57 case TGSI_SEMANTIC_PSIZE:
58 assert(index == 0);
59 vs_outputs->psize = i;
60 break;
61
62 case TGSI_SEMANTIC_COLOR:
63 assert(index < ATTR_COLOR_COUNT);
64 vs_outputs->color[index] = i;
65 break;
66
67 case TGSI_SEMANTIC_BCOLOR:
68 assert(index < ATTR_COLOR_COUNT);
69 vs_outputs->bcolor[index] = i;
70 break;
71
72 case TGSI_SEMANTIC_GENERIC:
73 assert(index < ATTR_GENERIC_COUNT);
74 vs_outputs->generic[index] = i;
75 break;
76
77 case TGSI_SEMANTIC_FOG:
78 assert(index == 0);
79 vs_outputs->fog = i;
80 break;
81
82 case TGSI_SEMANTIC_EDGEFLAG:
83 assert(index == 0);
84 fprintf(stderr, "r300 VP: cannot handle edgeflag output.\n");
85 break;
86
87 case TGSI_SEMANTIC_CLIPVERTEX:
88 assert(index == 0);
89 /* Draw does clip vertex for us. */
90 if (r300->screen->caps.has_tcl) {
91 fprintf(stderr, "r300 VP: cannot handle clip vertex output.\n");
92 }
93 break;
94
95 default:
96 fprintf(stderr, "r300 VP: unknown vertex output semantic: %i.\n",
97 info->output_semantic_name[i]);
98 }
99 }
100
101 /* WPOS is a straight copy of POSITION and it's always emitted. */
102 vs_outputs->wpos = i;
103 }
104
set_vertex_inputs_outputs(struct r300_vertex_program_compiler * c)105 static void set_vertex_inputs_outputs(struct r300_vertex_program_compiler * c)
106 {
107 struct r300_vertex_shader * vs = c->UserData;
108 struct r300_shader_semantics* outputs = &vs->outputs;
109 struct tgsi_shader_info* info = &vs->info;
110 int i, reg = 0;
111 boolean any_bcolor_used = outputs->bcolor[0] != ATTR_UNUSED ||
112 outputs->bcolor[1] != ATTR_UNUSED;
113
114 /* Fill in the input mapping */
115 for (i = 0; i < info->num_inputs; i++)
116 c->code->inputs[i] = i;
117
118 /* Position. */
119 if (outputs->pos != ATTR_UNUSED) {
120 c->code->outputs[outputs->pos] = reg++;
121 } else {
122 assert(0);
123 }
124
125 /* Point size. */
126 if (outputs->psize != ATTR_UNUSED) {
127 c->code->outputs[outputs->psize] = reg++;
128 }
129
130 /* If we're writing back facing colors we need to send
131 * four colors to make front/back face colors selection work.
132 * If the vertex program doesn't write all 4 colors, lets
133 * pretend it does by skipping output index reg so the colors
134 * get written into appropriate output vectors.
135 */
136
137 /* Colors. */
138 for (i = 0; i < ATTR_COLOR_COUNT; i++) {
139 if (outputs->color[i] != ATTR_UNUSED) {
140 c->code->outputs[outputs->color[i]] = reg++;
141 } else if (any_bcolor_used ||
142 outputs->color[1] != ATTR_UNUSED) {
143 reg++;
144 }
145 }
146
147 /* Back-face colors. */
148 for (i = 0; i < ATTR_COLOR_COUNT; i++) {
149 if (outputs->bcolor[i] != ATTR_UNUSED) {
150 c->code->outputs[outputs->bcolor[i]] = reg++;
151 } else if (any_bcolor_used) {
152 reg++;
153 }
154 }
155
156 /* Texture coordinates. */
157 for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
158 if (outputs->generic[i] != ATTR_UNUSED) {
159 c->code->outputs[outputs->generic[i]] = reg++;
160 }
161 }
162
163 /* Fog coordinates. */
164 if (outputs->fog != ATTR_UNUSED) {
165 c->code->outputs[outputs->fog] = reg++;
166 }
167
168 /* WPOS. */
169 c->code->outputs[outputs->wpos] = reg++;
170 }
171
r300_init_vs_outputs(struct r300_context * r300,struct r300_vertex_shader * vs)172 void r300_init_vs_outputs(struct r300_context *r300,
173 struct r300_vertex_shader *vs)
174 {
175 tgsi_scan_shader(vs->state.tokens, &vs->info);
176 r300_shader_read_vs_outputs(r300, &vs->info, &vs->outputs);
177 }
178
r300_dummy_vertex_shader(struct r300_context * r300,struct r300_vertex_shader * shader)179 static void r300_dummy_vertex_shader(
180 struct r300_context* r300,
181 struct r300_vertex_shader* shader)
182 {
183 struct ureg_program *ureg;
184 struct ureg_dst dst;
185 struct ureg_src imm;
186
187 /* Make a simple vertex shader which outputs (0, 0, 0, 1),
188 * effectively rendering nothing. */
189 ureg = ureg_create(TGSI_PROCESSOR_VERTEX);
190 dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
191 imm = ureg_imm4f(ureg, 0, 0, 0, 1);
192
193 ureg_MOV(ureg, dst, imm);
194 ureg_END(ureg);
195
196 shader->state.tokens = tgsi_dup_tokens(ureg_finalize(ureg));
197 ureg_destroy(ureg);
198
199 shader->dummy = TRUE;
200 r300_init_vs_outputs(r300, shader);
201 r300_translate_vertex_shader(r300, shader);
202 }
203
r300_translate_vertex_shader(struct r300_context * r300,struct r300_vertex_shader * vs)204 void r300_translate_vertex_shader(struct r300_context *r300,
205 struct r300_vertex_shader *vs)
206 {
207 struct r300_vertex_program_compiler compiler;
208 struct tgsi_to_rc ttr;
209 unsigned i;
210
211 /* Setup the compiler */
212 memset(&compiler, 0, sizeof(compiler));
213 rc_init(&compiler.Base);
214
215 DBG_ON(r300, DBG_VP) ? compiler.Base.Debug |= RC_DBG_LOG : 0;
216 DBG_ON(r300, DBG_P_STAT) ? compiler.Base.Debug |= RC_DBG_STATS : 0;
217 compiler.code = &vs->code;
218 compiler.UserData = vs;
219 compiler.Base.is_r500 = r300->screen->caps.is_r500;
220 compiler.Base.disable_optimizations = DBG_ON(r300, DBG_NO_OPT);
221 compiler.Base.has_half_swizzles = FALSE;
222 compiler.Base.has_presub = FALSE;
223 compiler.Base.has_omod = FALSE;
224 compiler.Base.max_temp_regs = 32;
225 compiler.Base.max_constants = 256;
226 compiler.Base.max_alu_insts = r300->screen->caps.is_r500 ? 1024 : 256;
227
228 if (compiler.Base.Debug & RC_DBG_LOG) {
229 DBG(r300, DBG_VP, "r300: Initial vertex program\n");
230 tgsi_dump(vs->state.tokens, 0);
231 }
232
233 /* Translate TGSI to our internal representation */
234 ttr.compiler = &compiler.Base;
235 ttr.info = &vs->info;
236 ttr.use_half_swizzles = FALSE;
237
238 r300_tgsi_to_rc(&ttr, vs->state.tokens);
239
240 if (ttr.error) {
241 fprintf(stderr, "r300 VP: Cannot translate a shader. "
242 "Using a dummy shader instead.\n");
243 r300_dummy_vertex_shader(r300, vs);
244 return;
245 }
246
247 if (compiler.Base.Program.Constants.Count > 200) {
248 compiler.Base.remove_unused_constants = TRUE;
249 }
250
251 compiler.RequiredOutputs = ~(~0 << (vs->info.num_outputs + 1));
252 compiler.SetHwInputOutput = &set_vertex_inputs_outputs;
253
254 /* Insert the WPOS output. */
255 rc_copy_output(&compiler.Base, 0, vs->outputs.wpos);
256
257 /* Invoke the compiler */
258 r3xx_compile_vertex_program(&compiler);
259 if (compiler.Base.Error) {
260 fprintf(stderr, "r300 VP: Compiler error:\n%sUsing a dummy shader"
261 " instead.\n", compiler.Base.ErrorMsg);
262
263 if (vs->dummy) {
264 fprintf(stderr, "r300 VP: Cannot compile the dummy shader! "
265 "Giving up...\n");
266 abort();
267 }
268
269 rc_destroy(&compiler.Base);
270 r300_dummy_vertex_shader(r300, vs);
271 return;
272 }
273
274 /* Initialize numbers of constants for each type. */
275 vs->externals_count = 0;
276 for (i = 0;
277 i < vs->code.constants.Count &&
278 vs->code.constants.Constants[i].Type == RC_CONSTANT_EXTERNAL; i++) {
279 vs->externals_count = i+1;
280 }
281 for (; i < vs->code.constants.Count; i++) {
282 assert(vs->code.constants.Constants[i].Type == RC_CONSTANT_IMMEDIATE);
283 }
284 vs->immediates_count = vs->code.constants.Count - vs->externals_count;
285
286 /* And, finally... */
287 rc_destroy(&compiler.Base);
288 }
289