summaryrefslogtreecommitdiffstats
path: root/src/mesa/state_tracker/st_program.c
blob: 9fc0798ec5870d4f3295da2fce555a766e2c751a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/
 /*
  * Authors:
  *   Keith Whitwell <keith@tungstengraphics.com>
  *   Brian Paul
  */


#include "main/imports.h"
#include "main/mtypes.h"

#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "pipe/draw/draw_context.h"
#include "pipe/tgsi/mesa/mesa_to_tgsi.h"
#include "pipe/tgsi/exec/tgsi_core.h"
#include "pipe/llvm/llvmtgsi.h"

#include "st_context.h"
#include "st_cache.h"
#include "st_atom.h"
#include "st_program.h"


#define TGSI_DEBUG 0


/**
 * Translate a Mesa vertex shader into a TGSI shader.
 * \param outputMapping  to map vertex program output registers to TGSI
 *                       output slots
 * \param tokensOut  destination for TGSI tokens
 * \return  pointer to cached pipe_shader object.
 */
const struct cso_vertex_shader *
st_translate_vertex_program(struct st_context *st,
                            struct st_vertex_program *stvp,
                            const GLuint outputMapping[],
                            struct tgsi_token *tokensOut,
                            GLuint maxTokens)
{
   GLuint defaultOutputMapping[VERT_RESULT_MAX];
   struct pipe_shader_state vs;
   const struct cso_vertex_shader *cso;
   GLuint attr, i;

   memset(&vs, 0, sizeof(vs));

   /*
    * Determine number of inputs, the mappings between VERT_ATTRIB_x
    * and TGSI generic input indexes, plus input attrib semantic info.
    */
   for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
      if (stvp->Base.Base.InputsRead & (1 << attr)) {
         const GLuint slot = vs.num_inputs;

         vs.num_inputs++;

         stvp->input_to_index[attr] = slot;
         stvp->index_to_input[slot] = attr;

         switch (attr) {
         case VERT_ATTRIB_POS:
            vs.input_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
            vs.input_semantic_index[slot] = 0;
            break;
         case VERT_ATTRIB_WEIGHT:
            /* fall-through */
         case VERT_ATTRIB_NORMAL:
            /* just label as a generic */
            vs.input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
            vs.input_semantic_index[slot] = 0;
            break;
         case VERT_ATTRIB_COLOR0:
            vs.input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
            vs.input_semantic_index[slot] = 0;
            break;
         case VERT_ATTRIB_COLOR1:
            vs.input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
            vs.input_semantic_index[slot] = 1;
            break;
         case VERT_ATTRIB_FOG:
            vs.input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
            vs.input_semantic_index[slot] = 0;
            break;
         case VERT_ATTRIB_TEX0:
         case VERT_ATTRIB_TEX1:
         case VERT_ATTRIB_TEX2:
         case VERT_ATTRIB_TEX3:
         case VERT_ATTRIB_TEX4:
         case VERT_ATTRIB_TEX5:
         case VERT_ATTRIB_TEX6:
         case VERT_ATTRIB_TEX7:
            vs.input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
            vs.input_semantic_index[slot] = attr - VERT_ATTRIB_TEX0;
            break;
         case VERT_ATTRIB_GENERIC0:
         case VERT_ATTRIB_GENERIC1:
         case VERT_ATTRIB_GENERIC2:
         case VERT_ATTRIB_GENERIC3:
         case VERT_ATTRIB_GENERIC4:
         case VERT_ATTRIB_GENERIC5:
         case VERT_ATTRIB_GENERIC6:
         case VERT_ATTRIB_GENERIC7:
            assert(attr < VERT_ATTRIB_MAX);
            vs.input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
            vs.input_semantic_index[slot] = attr - VERT_ATTRIB_GENERIC0;
            break;
         default:
            assert(0);
         }
      }
   }

   /* initialize output semantics to defaults */
   for (i = 0; i < PIPE_MAX_SHADER_OUTPUTS; i++) {
      vs.output_semantic_name[i] = TGSI_SEMANTIC_GENERIC;
      vs.output_semantic_index[i] = 0;
   }

   /*
    * Determine number of outputs, the (default) output register
    * mapping and the semantic information for each output.
    */
   for (attr = 0; attr < VERT_RESULT_MAX; attr++) {
      if (stvp->Base.Base.OutputsWritten & (1 << attr)) {
         GLuint slot;

         if (outputMapping) {
            slot = outputMapping[attr];
            assert(slot != ~0);
         }
         else {
            slot = vs.num_outputs;
            vs.num_outputs++;
            defaultOutputMapping[attr] = slot;
         }

         /*
         printf("Output %u -> slot %u\n", attr, slot);
         */

         switch (attr) {
         case VERT_RESULT_HPOS:
            vs.output_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
            vs.output_semantic_index[slot] = 0;
            break;
         case VERT_RESULT_COL0:
            vs.output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
            vs.output_semantic_index[slot] = 0;
            break;
         case VERT_RESULT_COL1:
            vs.output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
            vs.output_semantic_index[slot] = 1;
            break;
         case VERT_RESULT_BFC0:
            vs.output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
            vs.output_semantic_index[slot] = 0;
            break;
         case VERT_RESULT_BFC1:
            vs.output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
            vs.output_semantic_index[slot] = 1;
            break;
         case VERT_RESULT_FOGC:
            vs.output_semantic_name[slot] = TGSI_SEMANTIC_FOG;
            vs.output_semantic_index[slot] = 0;
            break;
         case VERT_RESULT_PSIZ:
            vs.output_semantic_name[slot] = TGSI_SEMANTIC_PSIZE;
            vs.output_semantic_index[slot] = 0;
            break;
         case VERT_RESULT_EDGE:
            assert(0);
            break;
         case VERT_RESULT_TEX0:
         case VERT_RESULT_TEX1:
         case VERT_RESULT_TEX2:
         case VERT_RESULT_TEX3:
         case VERT_RESULT_TEX4:
         case VERT_RESULT_TEX5:
         case VERT_RESULT_TEX6:
         case VERT_RESULT_TEX7:
            vs.output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
            vs.output_semantic_index[slot] = attr - VERT_RESULT_TEX0;
            break;
         case VERT_RESULT_VAR0:
            /* fall-through */
         default:
            assert(attr - VERT_RESULT_VAR0 < MAX_VARYING);
            vs.output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
            vs.output_semantic_index[slot] = attr - VERT_RESULT_VAR0;
         }
      }
   }


   if (outputMapping) {
      /* find max output slot referenced to compute vs.num_outputs */
      GLuint maxSlot = 0;
      for (attr = 0; attr < VERT_RESULT_MAX; attr++) {
         if (outputMapping[attr] != ~0 && outputMapping[attr] > maxSlot)
            maxSlot = outputMapping[attr];
      }
      vs.num_outputs = maxSlot + 1;
   }
   else {
      outputMapping = defaultOutputMapping;
   }

   /* XXX: fix static allocation of tokens:
    */
   tgsi_translate_mesa_program( TGSI_PROCESSOR_VERTEX,
                                &stvp->Base.Base,
                                /* inputs */
                                vs.num_inputs,
                                stvp->input_to_index,
                                vs.input_semantic_name,
                                vs.input_semantic_index,
                                NULL,
                                /* outputs */
                                vs.num_outputs,
                                outputMapping,
                                vs.output_semantic_name,
                                 vs.output_semantic_index,
                                /* tokenized result */
                                tokensOut, maxTokens);

   vs.tokens = tokensOut;
#ifdef MESA_LLVM
   vs.llvm_prog = (void*)gallivm_from_tgsi(st->pipe, vs.tokens);
#endif
   cso = st_cached_vs_state(st, &vs);
   stvp->vs = cso;

   if (TGSI_DEBUG)
      tgsi_dump( tokensOut, 0 );

   return cso;
}



/**
 * Translate a Mesa fragment shader into a TGSI shader.
 * \param inputMapping  to map fragment program input registers to TGSI
 *                      input slots
 * \param tokensOut  destination for TGSI tokens
 * \return  pointer to cached pipe_shader object.
 */
const struct cso_fragment_shader *
st_translate_fragment_program(struct st_context *st,
                              struct st_fragment_program *stfp,
                              const GLuint inputMapping[],
                              struct tgsi_token *tokensOut,
                              GLuint maxTokens)
{
   GLuint outputMapping[FRAG_RESULT_MAX];
   GLuint defaultInputMapping[FRAG_ATTRIB_MAX];
   struct pipe_shader_state fs;
   const struct cso_fragment_shader *cso;
   GLuint interpMode[16];  /* XXX size? */
   GLuint attr;
   GLbitfield inputsRead = stfp->Base.Base.InputsRead;

   /* For software rendering, we always need the fragment input position
    * in order to calculate interpolated values.
    * For i915, we always want to emit the semantic info for position.
    */
   inputsRead |= FRAG_BIT_WPOS;

   memset(&fs, 0, sizeof(fs));

   /*
    * Convert Mesa program inputs to TGSI input register semantics.
    */
   for (attr = 0; attr < FRAG_ATTRIB_MAX; attr++) {
      if (inputsRead & (1 << attr)) {
         const GLuint slot = fs.num_inputs;

         fs.num_inputs++;

         defaultInputMapping[attr] = slot;

         switch (attr) {
         case FRAG_ATTRIB_WPOS:
            fs.input_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
            fs.input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
            break;
         case FRAG_ATTRIB_COL0:
            fs.input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
            fs.input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
            break;
         case FRAG_ATTRIB_COL1:
            fs.input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
            fs.input_semantic_index[slot] = 1;
            interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
            break;
         case FRAG_ATTRIB_FOGC:
            fs.input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
            fs.input_semantic_index[slot] = 0;
            interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
            break;
         case FRAG_ATTRIB_TEX0:
         case FRAG_ATTRIB_TEX1:
         case FRAG_ATTRIB_TEX2:
         case FRAG_ATTRIB_TEX3:
         case FRAG_ATTRIB_TEX4:
         case FRAG_ATTRIB_TEX5:
         case FRAG_ATTRIB_TEX6:
         case FRAG_ATTRIB_TEX7:
            fs.input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
            fs.input_semantic_index[slot] = attr - FRAG_ATTRIB_TEX0;
            interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
            break;
         case FRAG_ATTRIB_VAR0:
            /* fall-through */
         default:
            fs.input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
            fs.input_semantic_index[slot] = attr - FRAG_ATTRIB_VAR0;
            interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
         }
      }
   }

   /*
    * Semantics and mapping for outputs
    */
   {
      uint numColors = 0;
      GLbitfield outputsWritten = stfp->Base.Base.OutputsWritten;

      /* if z is written, emit that first */
      if (outputsWritten & (1 << FRAG_RESULT_DEPR)) {
         fs.output_semantic_name[fs.num_outputs] = TGSI_SEMANTIC_POSITION;
         fs.output_semantic_index[fs.num_outputs] = 0;
         outputMapping[FRAG_RESULT_DEPR] = fs.num_outputs;
         fs.num_outputs++;
         outputsWritten &= ~(1 << FRAG_RESULT_DEPR);
      }

      /* handle remaning outputs (color) */
      for (attr = 0; attr < FRAG_RESULT_MAX; attr++) {
         if (outputsWritten & (1 << attr)) {
            switch (attr) {
            case FRAG_RESULT_DEPR:
               /* handled above */
               assert(0);
               break;
            case FRAG_RESULT_COLR:
               fs.output_semantic_name[fs.num_outputs] = TGSI_SEMANTIC_COLOR;
               fs.output_semantic_index[fs.num_outputs] = numColors;
               outputMapping[attr] = fs.num_outputs;
               numColors++;
               break;
            default:
               assert(0);
            }
            fs.num_outputs++;
         }
      }
   }

   if (!inputMapping)
      inputMapping = defaultInputMapping;

   /* XXX: fix static allocation of tokens:
    */
   tgsi_translate_mesa_program( TGSI_PROCESSOR_FRAGMENT,
                                &stfp->Base.Base,
                                /* inputs */
                                fs.num_inputs,
                                inputMapping,
                                fs.input_semantic_name,
                                fs.input_semantic_index,
                                interpMode,
                                /* outputs */
                                fs.num_outputs,
                                outputMapping,
                                fs.output_semantic_name,
                                fs.output_semantic_index,
                                /* tokenized result */
                                tokensOut, maxTokens);

   fs.tokens = tokensOut;
#ifdef MESA_LLVM
   /*fs.llvm_prog = gallivm_from_tgsi(st->pipe, fs.tokens);*/
#endif
   cso = st_cached_fs_state(st, &fs);
   stfp->fs = cso;

   if (TGSI_DEBUG)
      tgsi_dump( tokensOut, 0/*TGSI_DUMP_VERBOSE*/ );

   return cso;
}