summaryrefslogtreecommitdiffstats
path: root/src/gallium/auxiliary/draw/draw_private.h
blob: c3eca973e92fcfd6b6735c9b2dcc1a8922f81ace (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
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
/**************************************************************************
 * 
 * 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.
 * 
 **************************************************************************/

/**
 * Private data structures, etc for the draw module.
 */


/**
 * Authors:
 * Keith Whitwell <keith@tungstengraphics.com>
 * Brian Paul
 */


#ifndef DRAW_PRIVATE_H
#define DRAW_PRIVATE_H


#include "pipe/p_state.h"
#include "pipe/p_defines.h"

#include "tgsi/tgsi_scan.h"

#ifdef HAVE_LLVM
#include <llvm-c/ExecutionEngine.h>
struct draw_llvm;
#endif


/** Sum of frustum planes and user-defined planes */
#define DRAW_TOTAL_CLIP_PLANES (6 + PIPE_MAX_CLIP_PLANES)


struct pipe_context;
struct draw_vertex_shader;
struct draw_context;
struct draw_stage;
struct vbuf_render;
struct tgsi_exec_machine;
struct tgsi_sampler;
struct draw_pt_front_end;


/**
 * Basic vertex info.
 * Carry some useful information around with the vertices in the prim pipe.  
 */
struct vertex_header {
   unsigned clipmask:DRAW_TOTAL_CLIP_PLANES;
   unsigned edgeflag:1;
   unsigned have_clipdist:1;
   unsigned vertex_id:16;

   float clip[4];
   float pre_clip_pos[4];

   /* This will probably become float (*data)[4] soon:
    */
   float data[][4];
};

/* NOTE: It should match vertex_id size above */
#define UNDEFINED_VERTEX_ID 0xffff


/* maximum number of shader variants we can cache */
#define DRAW_MAX_SHADER_VARIANTS 128

/**
 * Private context for the drawing module.
 */
struct draw_context
{
   struct pipe_context *pipe;

   /** Drawing/primitive pipeline stages */
   struct {
      struct draw_stage *first;  /**< one of the following */

      struct draw_stage *validate; 

      /* stages (in logical order) */
      struct draw_stage *flatshade;
      struct draw_stage *clip;
      struct draw_stage *cull;
      struct draw_stage *twoside;
      struct draw_stage *offset;
      struct draw_stage *unfilled;
      struct draw_stage *stipple;
      struct draw_stage *aapoint;
      struct draw_stage *aaline;
      struct draw_stage *pstipple;
      struct draw_stage *wide_line;
      struct draw_stage *wide_point;
      struct draw_stage *rasterize;

      float wide_point_threshold; /**< convert pnts to tris if larger than this */
      float wide_line_threshold;  /**< convert lines to tris if wider than this */
      boolean wide_point_sprites; /**< convert points to tris for sprite mode */
      boolean line_stipple;       /**< do line stipple? */
      boolean point_sprite;       /**< convert points to quads for sprites? */

      /* Temporary storage while the pipeline is being run:
       */
      char *verts;
      unsigned vertex_stride;
      unsigned vertex_count;
   } pipeline;


   struct vbuf_render *render;

   /* Support prototype passthrough path:
    */
   struct {
      /* Current active frontend */
      struct draw_pt_front_end *frontend;
      unsigned prim;
      unsigned opt;
      unsigned eltSize; /* saved eltSize for flushing */

      struct {
         struct draw_pt_middle_end *fetch_emit;
         struct draw_pt_middle_end *fetch_shade_emit;
         struct draw_pt_middle_end *general;
         struct draw_pt_middle_end *llvm;
      } middle;

      struct {
         struct draw_pt_front_end *vsplit;
      } front;

      struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS];
      unsigned nr_vertex_buffers;

      /*
       * This is the largest legal index value for the current set of
       * bound vertex buffers.  Regardless of any other consideration,
       * all vertex lookups need to be clamped to 0..max_index to
       * prevent out-of-bound access.
       */
      unsigned max_index;

      struct pipe_vertex_element vertex_element[PIPE_MAX_ATTRIBS];
      unsigned nr_vertex_elements;

      struct pipe_index_buffer index_buffer;

      /* user-space vertex data, buffers */
      struct {
         /** vertex element/index buffer (ex: glDrawElements) */
         const void *elts;
         /** bytes per index (0, 1, 2 or 4) */
         unsigned eltSize;
         int eltBias;
         unsigned min_index;
         unsigned max_index;
         
         /** vertex arrays */
         const void *vbuffer[PIPE_MAX_ATTRIBS];
         
         /** constant buffers (for vertex/geometry shader) */
         const void *vs_constants[PIPE_MAX_CONSTANT_BUFFERS];
         unsigned vs_constants_size[PIPE_MAX_CONSTANT_BUFFERS];
         const void *gs_constants[PIPE_MAX_CONSTANT_BUFFERS];
         unsigned gs_constants_size[PIPE_MAX_CONSTANT_BUFFERS];
         
         /* pointer to planes */
         float (*planes)[DRAW_TOTAL_CLIP_PLANES][4]; 
      } user;

      boolean test_fse;         /* enable FSE even though its not correct (eg for softpipe) */
      boolean no_fse;           /* disable FSE even when it is correct */
   } pt;

   struct {
      boolean bypass_clip_xy;
      boolean bypass_clip_z;
      boolean guard_band_xy;
   } driver;

   boolean flushing;         /**< debugging/sanity */
   boolean suspend_flushing; /**< internally set */

   /* Flags set if API requires clipping in these planes and the
    * driver doesn't indicate that it can do it for us.
    */
   boolean clip_xy;
   boolean clip_z;
   boolean clip_user;
   boolean guard_band_xy;

   boolean force_passthrough; /**< never clip or shade */

   boolean dump_vs;

   double mrd;  /**< minimum resolvable depth value, for polygon offset */

   /** Current rasterizer state given to us by the driver */
   const struct pipe_rasterizer_state *rasterizer;
   /** Driver CSO handle for the current rasterizer state */
   void *rast_handle;

   /** Rasterizer CSOs without culling/stipple/etc */
   void *rasterizer_no_cull[2][2];

   struct pipe_viewport_state viewport;
   boolean identity_viewport;

   /** Vertex shader state */
   struct {
      struct draw_vertex_shader *vertex_shader;
      uint num_vs_outputs;  /**< convenience, from vertex_shader */
      uint position_output;
      uint edgeflag_output;
      uint clipvertex_output;
      uint clipdistance_output[2];
      /** TGSI program interpreter runtime state */
      struct tgsi_exec_machine *machine;

      uint num_samplers;
      struct tgsi_sampler **samplers;


      const void *aligned_constants[PIPE_MAX_CONSTANT_BUFFERS];

      const void *aligned_constant_storage[PIPE_MAX_CONSTANT_BUFFERS];
      unsigned const_storage_size[PIPE_MAX_CONSTANT_BUFFERS];


      struct translate *fetch;
      struct translate_cache *fetch_cache;
      struct translate *emit;
      struct translate_cache *emit_cache;
   } vs;

   /** Geometry shader state */
   struct {
      struct draw_geometry_shader *geometry_shader;
      uint num_gs_outputs;  /**< convenience, from geometry_shader */
      uint position_output;

      /** TGSI program interpreter runtime state */
      struct tgsi_exec_machine *machine;

      uint num_samplers;
      struct tgsi_sampler **samplers;
   } gs;

   /** Fragment shader state */
   struct {
      struct draw_fragment_shader *fragment_shader;
   } fs;

   /** Stream output (vertex feedback) state */
   struct {
      struct pipe_stream_output_info state;
      struct draw_so_target *targets[PIPE_MAX_SO_BUFFERS];
      uint num_targets;
   } so;

   /* Clip derived state:
    */
   float plane[DRAW_TOTAL_CLIP_PLANES][4];

   /* If a prim stage introduces new vertex attributes, they'll be stored here
    */
   struct {
      uint num;
      uint semantic_name[10];
      uint semantic_index[10];
      uint slot[10];
   } extra_shader_outputs;

   unsigned instance_id;

#ifdef HAVE_LLVM
   struct draw_llvm *llvm;
   struct gallivm_state *own_gallivm;
#endif

   struct pipe_sampler_view *sampler_views[PIPE_MAX_VERTEX_SAMPLERS];
   unsigned num_sampler_views;
   const struct pipe_sampler_state *samplers[PIPE_MAX_VERTEX_SAMPLERS];
   unsigned num_samplers;

   void *driver_private;
};


struct draw_fetch_info {
   boolean linear;
   unsigned start;
   const unsigned *elts;
   unsigned count;
};

struct draw_vertex_info {
   struct vertex_header *verts;
   unsigned vertex_size;
   unsigned stride;
   unsigned count;
};

/* these flags are set if the primitive is a segment of a larger one */
#define DRAW_SPLIT_BEFORE 0x1
#define DRAW_SPLIT_AFTER  0x2

struct draw_prim_info {
   boolean linear;
   unsigned start;

   const ushort *elts;
   unsigned count;

   unsigned prim;
   unsigned flags;
   unsigned *primitive_lengths;
   unsigned primitive_count;
};


/*******************************************************************************
 * Draw common initialization code
 */
boolean draw_init(struct draw_context *draw);

/*******************************************************************************
 * Vertex shader code:
 */
boolean draw_vs_init( struct draw_context *draw );
void draw_vs_destroy( struct draw_context *draw );

void draw_vs_set_viewport( struct draw_context *, 
                           const struct pipe_viewport_state * );

void
draw_vs_set_constants(struct draw_context *,
                      unsigned slot,
                      const void *constants,
                      unsigned size);



/*******************************************************************************
 * Geometry shading code:
 */
boolean draw_gs_init( struct draw_context *draw );

void
draw_gs_set_constants(struct draw_context *,
                      unsigned slot,
                      const void *constants,
                      unsigned size);

void draw_gs_destroy( struct draw_context *draw );

/*******************************************************************************
 * Common shading code:
 */
uint draw_current_shader_outputs(const struct draw_context *draw);
uint draw_current_shader_position_output(const struct draw_context *draw);
uint draw_current_shader_clipvertex_output(const struct draw_context *draw);
uint draw_current_shader_clipdistance_output(const struct draw_context *draw, int index);
int draw_alloc_extra_vertex_attrib(struct draw_context *draw,
                                   uint semantic_name, uint semantic_index);
void draw_remove_extra_vertex_attribs(struct draw_context *draw);


/*******************************************************************************
 * Vertex processing (was passthrough) code:
 */
boolean draw_pt_init( struct draw_context *draw );
void draw_pt_destroy( struct draw_context *draw );
void draw_pt_reset_vertex_ids( struct draw_context *draw );
void draw_pt_flush( struct draw_context *draw, unsigned flags );


/*******************************************************************************
 * Primitive processing (pipeline) code: 
 */

boolean draw_pipeline_init( struct draw_context *draw );
void draw_pipeline_destroy( struct draw_context *draw );





/*
 * These flags are used by the pipeline when unfilled and/or line stipple modes
 * are operational.
 */
#define DRAW_PIPE_EDGE_FLAG_0   0x1
#define DRAW_PIPE_EDGE_FLAG_1   0x2
#define DRAW_PIPE_EDGE_FLAG_2   0x4
#define DRAW_PIPE_EDGE_FLAG_ALL 0x7
#define DRAW_PIPE_RESET_STIPPLE 0x8

void draw_pipeline_run( struct draw_context *draw,
                        const struct draw_vertex_info *vert,
                        const struct draw_prim_info *prim);

void draw_pipeline_run_linear( struct draw_context *draw,
                               const struct draw_vertex_info *vert,
                               const struct draw_prim_info *prim);




void draw_pipeline_flush( struct draw_context *draw, 
                          unsigned flags );



/*******************************************************************************
 * Flushing 
 */

#define DRAW_FLUSH_STATE_CHANGE              0x8
#define DRAW_FLUSH_BACKEND                   0x10


void draw_do_flush( struct draw_context *draw, unsigned flags );



void *
draw_get_rasterizer_no_cull( struct draw_context *draw,
                             boolean scissor,
                             boolean flatshade );


#endif /* DRAW_PRIVATE_H */