summaryrefslogtreecommitdiff
path: root/src/gallium/auxiliary/draw/draw_private.h
blob: 1e6e01af9e281cd0f20333f8c2543d71dd139fd8 (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
/**************************************************************************
 * 
 * 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"


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


/**
 * Basic vertex info.
 * Carry some useful information around with the vertices in the prim pipe.  
 */
struct vertex_header {
   unsigned clipmask:12;
   unsigned edgeflag:1;
   unsigned pad:3;
   unsigned vertex_id:16;

   float clip[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


/**
 * Private context for the drawing module.
 */
struct draw_context
{
   /** 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 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 {
      struct {
         struct draw_pt_middle_end *fetch_emit;
         struct draw_pt_middle_end *fetch_shade_emit;
         struct draw_pt_middle_end *general;
      } middle;

      struct {
         struct draw_pt_front_end *vcache;
         struct draw_pt_front_end *varray;
      } front;

      struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS];
      unsigned nr_vertex_buffers;

      struct pipe_vertex_element vertex_element[PIPE_MAX_ATTRIBS];
      unsigned nr_vertex_elements;

      /* 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;
         unsigned min_index;
         unsigned max_index;
         
         /** vertex arrays */
         const void *vbuffer[PIPE_MAX_ATTRIBS];
         
         /** constant buffer (for vertex/geometry shader) */
         const void *vs_constants[PIPE_MAX_CONSTANT_BUFFERS];
         const void *gs_constants[PIPE_MAX_CONSTANT_BUFFERS];
      } 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_clipping;
      boolean bypass_vs;
   } driver;

   boolean flushing;         /**< debugging/sanity */
   boolean suspend_flushing; /**< internally set */
   boolean bypass_clipping;  /**< set if either api or driver bypass_clipping true */

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

   boolean dump_vs;

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

   /* pipe state that we need: */
   const struct pipe_rasterizer_state *rasterizer;
   struct pipe_viewport_state viewport;
   boolean identity_viewport;

   struct {
      struct draw_vertex_shader *vertex_shader;
      uint num_vs_outputs;  /**< convenience, from vertex_shader */
      uint position_output;
      uint edgeflag_output;

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

      uint num_samplers;
      struct tgsi_sampler **samplers;

      /* Here's another one:
       */
      struct aos_machine *aos_machine; 


      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;

   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;

   /* Clip derived state:
    */
   float plane[12][4];
   unsigned nr_planes;

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

   unsigned reduced_prim;

   unsigned instance_id;

   void *driver_private;
};


/*******************************************************************************
 * 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);

/*******************************************************************************
 * 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 );


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

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





/* We use the top few bits in the elts[] parameter to convey a little
 * API information.  This limits the number of vertices we can address
 * to only 4096 -- if that becomes a problem, we can switch to 32-bit
 * draw indices.
 *
 * These flags expected at first vertex of lines & triangles when
 * unfilled and/or line stipple modes are operational.
 */
#define DRAW_PIPE_MAX_VERTICES  (0x1<<12)
#define DRAW_PIPE_EDGE_FLAG_0   (0x1<<12)
#define DRAW_PIPE_EDGE_FLAG_1   (0x2<<12)
#define DRAW_PIPE_EDGE_FLAG_2   (0x4<<12)
#define DRAW_PIPE_EDGE_FLAG_ALL (0x7<<12)
#define DRAW_PIPE_RESET_STIPPLE (0x8<<12)
#define DRAW_PIPE_FLAG_MASK     (0xf<<12)

void draw_pipeline_run( struct draw_context *draw,
                        unsigned prim,
                        struct vertex_header *vertices,
                        unsigned vertex_count,
                        unsigned stride,
                        const ushort *elts,
                        unsigned count );

void draw_pipeline_run_linear( struct draw_context *draw,
                               unsigned prim,
                               struct vertex_header *vertices,
                               unsigned count,
                               unsigned stride );



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 );




#endif /* DRAW_PRIVATE_H */