1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
29 * Private data structures, etc for the draw module.
35 * Keith Whitwell <keith@tungstengraphics.com>
40 #ifndef DRAW_PRIVATE_H
41 #define DRAW_PRIVATE_H
44 #include "pipe/p_state.h"
45 #include "pipe/p_defines.h"
47 #include "rtasm/rtasm_x86sse.h"
48 #include "tgsi/exec/tgsi_exec.h"
49 #include "tgsi/util/tgsi_scan.h"
54 struct gallivm_cpu_engine
;
56 struct draw_pt_middle_end
;
57 struct draw_pt_front_end
;
58 struct draw_vertex_shader
;
60 #define MAX_SHADER_VERTICES 128
64 * Carry some useful information around with the vertices in the prim pipe.
66 struct vertex_header
{
70 unsigned vertex_id
:16;
74 float data
[][4]; /* Note variable size */
77 /* NOTE: It should match vertex_id size above */
78 #define UNDEFINED_VERTEX_ID 0xffff
80 /* XXX This is too large */
81 #define MAX_VERTEX_SIZE ((2 + PIPE_MAX_SHADER_OUTPUTS) * 4 * sizeof(float))
82 #define MAX_VERTEX_ALLOCATION ((MAX_VERTEX_SIZE + 0x0f) & ~0x0f)
87 * Basic info for a point/line/triangle primitive.
90 float det
; /**< front/back face determinant */
91 unsigned reset_line_stipple
:1;
94 struct vertex_header
*v
[3]; /**< 1 to 3 vertex pointers */
102 * Base class for all primitive drawing stages.
106 struct draw_context
*draw
; /**< parent context */
108 struct draw_stage
*next
; /**< next stage in pipeline */
110 struct vertex_header
**tmp
; /**< temp vert storage, such as for clipping */
113 void (*point
)( struct draw_stage
*,
114 struct prim_header
* );
116 void (*line
)( struct draw_stage
*,
117 struct prim_header
* );
119 void (*tri
)( struct draw_stage
*,
120 struct prim_header
* );
122 void (*flush
)( struct draw_stage
*,
125 void (*reset_stipple_counter
)( struct draw_stage
* );
127 void (*destroy
)( struct draw_stage
* );
131 #define PRIM_QUEUE_LENGTH 32
132 #define VCACHE_SIZE 32
133 #define VCACHE_OVERFLOW 4
134 #define VS_QUEUE_LENGTH (VCACHE_SIZE + VCACHE_OVERFLOW + 1) /* can never fill up */
138 /* Internal function for vertex fetch.
140 typedef void (*fetch_func
)(const void *ptr
, float *attrib
);
142 fetch_func
draw_get_fetch_func( enum pipe_format format
);
146 typedef void (*full_fetch_func
)( struct draw_context
*draw
,
147 struct tgsi_exec_machine
*machine
,
148 const unsigned *elts
,
151 typedef void (*pt_fetch_func
)( struct draw_context
*draw
,
161 #define PT_CLIPTEST 0x2
162 #define PT_PIPELINE 0x4
163 #define PT_MAX_MIDDLE 0x8
166 * Private context for the drawing module.
170 /** Drawing/primitive pipeline stages */
172 struct draw_stage
*first
; /**< one of the following */
174 struct draw_stage
*validate
;
176 /* stages (in logical order) */
177 struct draw_stage
*flatshade
;
178 struct draw_stage
*clip
;
179 struct draw_stage
*cull
;
180 struct draw_stage
*twoside
;
181 struct draw_stage
*offset
;
182 struct draw_stage
*unfilled
;
183 struct draw_stage
*stipple
;
184 struct draw_stage
*aapoint
;
185 struct draw_stage
*aaline
;
186 struct draw_stage
*pstipple
;
187 struct draw_stage
*wide_line
;
188 struct draw_stage
*wide_point
;
189 struct draw_stage
*rasterize
;
193 struct vbuf_render
*render
;
195 /* Support prototype passthrough path:
198 unsigned prim
; /* XXX: to be removed */
199 unsigned hw_vertex_size
; /* XXX: to be removed */
202 struct draw_pt_middle_end
*opt
[PT_MAX_MIDDLE
];
206 struct draw_pt_front_end
*vcache
;
211 unsigned vertex_stride
;
212 unsigned vertex_count
;
219 /* pipe state that we need: */
220 const struct pipe_rasterizer_state
*rasterizer
;
221 struct pipe_viewport_state viewport
;
223 struct pipe_vertex_buffer vertex_buffer
[PIPE_MAX_ATTRIBS
];
224 unsigned nr_vertex_buffers
;
226 struct pipe_vertex_element vertex_element
[PIPE_MAX_ATTRIBS
];
227 struct draw_vertex_shader
*vertex_shader
;
229 boolean identity_viewport
;
231 uint num_vs_outputs
; /**< convenience, from vertex_shader */
233 /* user-space vertex data, buffers */
235 const unsigned *edgeflag
;
237 /** vertex element/index buffer (ex: glDrawElements) */
239 /** bytes per index (0, 1, 2 or 4) */
243 const void *vbuffer
[PIPE_MAX_ATTRIBS
];
245 /** constant buffer (for vertex shader) */
246 const void *constants
;
249 /* Clip derived state:
254 float wide_point_threshold
; /**< convert pnts to tris if larger than this */
255 float wide_line_threshold
; /**< convert lines to tris if wider than this */
256 boolean line_stipple
; /**< do line stipple? */
257 boolean point_sprite
; /**< convert points to quads for sprites? */
259 boolean use_pt_shaders
; /* temporary flag to switch on pt shader paths */
261 /* If a prim stage introduces new vertex attributes, they'll be stored here
269 unsigned reduced_prim
;
271 /** TGSI program interpreter runtime state */
272 struct tgsi_exec_machine machine
;
274 /* Vertex fetch internal state
277 const ubyte
*src_ptr
[PIPE_MAX_ATTRIBS
];
278 unsigned pitch
[PIPE_MAX_ATTRIBS
];
279 fetch_func fetch
[PIPE_MAX_ATTRIBS
];
281 full_fetch_func fetch_func
;
282 pt_fetch_func pt_fetch
;
285 /* Post-tnl vertex cache:
288 unsigned referenced
; /**< bitfield */
291 unsigned in
; /* client array element */
292 unsigned out
; /* index in vs queue/array */
293 } idx
[VCACHE_SIZE
+ VCACHE_OVERFLOW
];
297 /** To find space in the vertex cache: */
298 struct vertex_header
*(*get_vertex
)( struct draw_context
*draw
,
302 /* Vertex shader queue:
305 unsigned elts
[VS_QUEUE_LENGTH
]; /**< index into the user's vertex arrays */
312 * Run the vertex shader on all vertices in the vertex queue.
314 void (*shader_queue_flush
)(struct draw_context
*draw
);
316 /* Prim pipeline queue:
319 /* Need to queue up primitives until their vertices have been
320 * transformed by a vs queue flush.
322 struct prim_header queue
[PRIM_QUEUE_LENGTH
];
327 /* This (and the tgsi_exec_machine struct) probably need to be moved somewhere private.
329 struct gallivm_cpu_engine
*engine
;
330 void *driver_private
;
335 extern struct draw_stage
*draw_unfilled_stage( struct draw_context
*context
);
336 extern struct draw_stage
*draw_twoside_stage( struct draw_context
*context
);
337 extern struct draw_stage
*draw_offset_stage( struct draw_context
*context
);
338 extern struct draw_stage
*draw_clip_stage( struct draw_context
*context
);
339 extern struct draw_stage
*draw_flatshade_stage( struct draw_context
*context
);
340 extern struct draw_stage
*draw_cull_stage( struct draw_context
*context
);
341 extern struct draw_stage
*draw_stipple_stage( struct draw_context
*context
);
342 extern struct draw_stage
*draw_wide_line_stage( struct draw_context
*context
);
343 extern struct draw_stage
*draw_wide_point_stage( struct draw_context
*context
);
344 extern struct draw_stage
*draw_validate_stage( struct draw_context
*context
);
347 extern void draw_free_temp_verts( struct draw_stage
*stage
);
349 extern void draw_alloc_temp_verts( struct draw_stage
*stage
, unsigned nr
);
351 extern void draw_reset_vertex_ids( struct draw_context
*draw
);
354 extern int draw_vertex_cache_check_space( struct draw_context
*draw
,
357 extern void draw_vertex_cache_invalidate( struct draw_context
*draw
);
358 extern void draw_vertex_cache_unreference( struct draw_context
*draw
);
359 extern void draw_vertex_cache_reset_vertex_ids( struct draw_context
*draw
);
361 extern void draw_vertex_shader_queue_flush( struct draw_context
*draw
);
363 extern void draw_update_vertex_fetch( struct draw_context
*draw
);
365 extern boolean
draw_need_pipeline(const struct draw_context
*draw
,
369 /* Passthrough mode (second attempt):
371 boolean
draw_pt_init( struct draw_context
*draw
);
372 void draw_pt_destroy( struct draw_context
*draw
);
373 boolean
draw_pt_arrays( struct draw_context
*draw
,
378 void draw_pt_reset_vertex_ids( struct draw_context
*draw
);
379 void draw_pt_run_pipeline( struct draw_context
*draw
,
382 unsigned vertex_stride
,
383 unsigned vertex_count
,
388 #define DRAW_FLUSH_SHADER_QUEUE 0x1 /* sized not to overflow, never raised */
389 #define DRAW_FLUSH_PRIM_QUEUE 0x2
390 #define DRAW_FLUSH_VERTEX_CACHE 0x4
391 #define DRAW_FLUSH_STATE_CHANGE 0x8
392 #define DRAW_FLUSH_BACKEND 0x10
395 void draw_do_flush( struct draw_context
*draw
, unsigned flags
);
397 boolean
draw_get_edgeflag( struct draw_context
*draw
,
402 * Get a writeable copy of a vertex.
403 * \param stage drawing stage info
404 * \param vert the vertex to copy (source)
405 * \param idx index into stage's tmp[] array to put the copy (dest)
406 * \return pointer to the copied vertex
408 static INLINE
struct vertex_header
*
409 dup_vert( struct draw_stage
*stage
,
410 const struct vertex_header
*vert
,
413 struct vertex_header
*tmp
= stage
->tmp
[idx
];
414 const uint vsize
= sizeof(struct vertex_header
)
415 + stage
->draw
->num_vs_outputs
* 4 * sizeof(float);
416 memcpy(tmp
, vert
, vsize
);
417 tmp
->vertex_id
= UNDEFINED_VERTEX_ID
;
422 dot4(const float *a
, const float *b
)
424 float result
= (a
[0]*b
[0] +
432 static INLINE
struct vertex_header
*
433 draw_header_from_block(char *block
, int size
, int num
)
435 return (struct vertex_header
*)(block
+ num
* size
);
438 #endif /* DRAW_PRIVATE_H */