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 vs_outputs->num_generic++;
76 break;
77
78 case TGSI_SEMANTIC_FOG:
79 assert(index == 0);
80 vs_outputs->fog = i;
81 break;
82
83 case TGSI_SEMANTIC_EDGEFLAG:
84 assert(index == 0);
85 fprintf(stderr, "r300 VP: cannot handle edgeflag output.\n");
86 break;
87
88 case TGSI_SEMANTIC_CLIPVERTEX:
89 assert(index == 0);
90 /* Draw does clip vertex for us. */
91 if (r300->screen->caps.has_tcl) {
92 fprintf(stderr, "r300 VP: cannot handle clip vertex output.\n");
93 }
94 break;
95
96 default:
97 fprintf(stderr, "r300 VP: unknown vertex output semantic: %i.\n",
98 info->output_semantic_name[i]);
99 }
100 }
101
102 /* WPOS is a straight copy of POSITION and it's always emitted. */
103 vs_outputs->wpos = i;
104 }
105
set_vertex_inputs_outputs(struct r300_vertex_program_compiler * c)106 static void set_vertex_inputs_outputs(struct r300_vertex_program_compiler * c)
107 {
108 struct r300_vertex_shader * vs = c->UserData;
109 struct r300_shader_semantics* outputs = &vs->outputs;
110 struct tgsi_shader_info* info = &vs->info;
111 int i, reg = 0;
112 boolean any_bcolor_used = outputs->bcolor[0] != ATTR_UNUSED ||
113 outputs->bcolor[1] != ATTR_UNUSED;
114
115 /* Fill in the input mapping */
116 for (i = 0; i < info->num_inputs; i++)
117 c->code->inputs[i] = i;
118
119 /* Position. */
120 if (outputs->pos != ATTR_UNUSED) {
121 c->code->outputs[outputs->pos] = reg++;
122 } else {
123 assert(0);
124 }
125
126 /* Point size. */
127 if (outputs->psize != ATTR_UNUSED) {
128 c->code->outputs[outputs->psize] = reg++;
129 }
130
131 /* If we're writing back facing colors we need to send
132 * four colors to make front/back face colors selection work.
133 * If the vertex program doesn't write all 4 colors, lets
134 * pretend it does by skipping output index reg so the colors
135 * get written into appropriate output vectors.
136 */
137
138 /* Colors. */
139 for (i = 0; i < ATTR_COLOR_COUNT; i++) {
140 if (outputs->color[i] != ATTR_UNUSED) {
141 c->code->outputs[outputs->color[i]] = reg++;
142 } else if (any_bcolor_used ||
143 outputs->color[1] != ATTR_UNUSED) {
144 reg++;
145 }
146 }
147
148 /* Back-face colors. */
149 for (i = 0; i < ATTR_COLOR_COUNT; i++) {
150 if (outputs->bcolor[i] != ATTR_UNUSED) {
151 c->code->outputs[outputs->bcolor[i]] = reg++;
152 } else if (any_bcolor_used) {
153 reg++;
154 }
155 }
156
157 /* Texture coordinates. */
158 for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
159 if (outputs->generic[i] != ATTR_UNUSED) {
160 c->code->outputs[outputs->generic[i]] = reg++;
161 }
162 }
163
164 /* Fog coordinates. */
165 if (outputs->fog != ATTR_UNUSED) {
166 c->code->outputs[outputs->fog] = reg++;
167 }
168
169 /* WPOS. */
170 c->code->outputs[outputs->wpos] = reg++;
171 }
172
r300_init_vs_outputs(struct r300_context * r300,struct r300_vertex_shader * vs)173 void r300_init_vs_outputs(struct r300_context *r300,
174 struct r300_vertex_shader *vs)
175 {
176 tgsi_scan_shader(vs->state.tokens, &vs->info);
177 r300_shader_read_vs_outputs(r300, &vs->info, &vs->outputs);
178 }
179
r300_dummy_vertex_shader(struct r300_context * r300,struct r300_vertex_shader * shader)180 static void r300_dummy_vertex_shader(
181 struct r300_context* r300,
182 struct r300_vertex_shader* shader)
183 {
184 struct ureg_program *ureg;
185 struct ureg_dst dst;
186 struct ureg_src imm;
187
188 /* Make a simple vertex shader which outputs (0, 0, 0, 1),
189 * effectively rendering nothing. */
190 ureg = ureg_create(PIPE_SHADER_VERTEX);
191 dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
192 imm = ureg_imm4f(ureg, 0, 0, 0, 1);
193
194 ureg_MOV(ureg, dst, imm);
195 ureg_END(ureg);
196
197 shader->state.tokens = tgsi_dup_tokens(ureg_finalize(ureg));
198 ureg_destroy(ureg);
199
200 shader->dummy = TRUE;
201 r300_init_vs_outputs(r300, shader);
202 r300_translate_vertex_shader(r300, shader);
203 }
204
r300_translate_vertex_shader(struct r300_context * r300,struct r300_vertex_shader * vs)205 void r300_translate_vertex_shader(struct r300_context *r300,
206 struct r300_vertex_shader *vs)
207 {
208 struct r300_vertex_program_compiler compiler;
209 struct tgsi_to_rc ttr;
210 unsigned i;
211
212 /* Setup the compiler */
213 memset(&compiler, 0, sizeof(compiler));
214 rc_init(&compiler.Base, NULL);
215
216 DBG_ON(r300, DBG_VP) ? compiler.Base.Debug |= RC_DBG_LOG : 0;
217 DBG_ON(r300, DBG_P_STAT) ? compiler.Base.Debug |= RC_DBG_STATS : 0;
218 compiler.code = &vs->code;
219 compiler.UserData = vs;
220 compiler.Base.is_r500 = r300->screen->caps.is_r500;
221 compiler.Base.disable_optimizations = DBG_ON(r300, DBG_NO_OPT);
222 compiler.Base.has_half_swizzles = FALSE;
223 compiler.Base.has_presub = FALSE;
224 compiler.Base.has_omod = FALSE;
225 compiler.Base.max_temp_regs = 32;
226 compiler.Base.max_constants = 256;
227 compiler.Base.max_alu_insts = r300->screen->caps.is_r500 ? 1024 : 256;
228
229 if (compiler.Base.Debug & RC_DBG_LOG) {
230 DBG(r300, DBG_VP, "r300: Initial vertex program\n");
231 tgsi_dump(vs->state.tokens, 0);
232 }
233
234 /* Translate TGSI to our internal representation */
235 ttr.compiler = &compiler.Base;
236 ttr.info = &vs->info;
237 ttr.use_half_swizzles = FALSE;
238
239 r300_tgsi_to_rc(&ttr, vs->state.tokens);
240
241 if (ttr.error) {
242 fprintf(stderr, "r300 VP: Cannot translate a shader. "
243 "Using a dummy shader instead.\n");
244 r300_dummy_vertex_shader(r300, vs);
245 return;
246 }
247
248 if (compiler.Base.Program.Constants.Count > 200) {
249 compiler.Base.remove_unused_constants = TRUE;
250 }
251
252 compiler.RequiredOutputs = ~(~0 << (vs->info.num_outputs + 1));
253 compiler.SetHwInputOutput = &set_vertex_inputs_outputs;
254
255 /* Insert the WPOS output. */
256 rc_copy_output(&compiler.Base, 0, vs->outputs.wpos);
257
258 /* Invoke the compiler */
259 r3xx_compile_vertex_program(&compiler);
260 if (compiler.Base.Error) {
261 fprintf(stderr, "r300 VP: Compiler error:\n%sUsing a dummy shader"
262 " instead.\n", compiler.Base.ErrorMsg);
263
264 if (vs->dummy) {
265 fprintf(stderr, "r300 VP: Cannot compile the dummy shader! "
266 "Giving up...\n");
267 abort();
268 }
269
270 rc_destroy(&compiler.Base);
271 r300_dummy_vertex_shader(r300, vs);
272 return;
273 }
274
275 /* Initialize numbers of constants for each type. */
276 vs->externals_count = 0;
277 for (i = 0;
278 i < vs->code.constants.Count &&
279 vs->code.constants.Constants[i].Type == RC_CONSTANT_EXTERNAL; i++) {
280 vs->externals_count = i+1;
281 }
282 for (; i < vs->code.constants.Count; i++) {
283 assert(vs->code.constants.Constants[i].Type == RC_CONSTANT_IMMEDIATE);
284 }
285 vs->immediates_count = vs->code.constants.Count - vs->externals_count;
286
287 /* And, finally... */
288 rc_destroy(&compiler.Base);
289 }
290