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 **************************************************************************/
30 * Keith Whitwell <keith@tungstengraphics.com>
34 #include "pipe/p_util.h"
35 #include "draw_context.h"
36 #include "draw_private.h"
37 #include "draw_vbuf.h"
40 struct draw_context
*draw_create( void )
42 struct draw_context
*draw
= CALLOC_STRUCT( draw_context
);
46 #if defined(__i386__) || defined(__386__)
47 draw
->use_sse
= GETENV( "GALLIUM_NOSSE" ) == NULL
;
49 draw
->use_sse
= FALSE
;
52 /* create pipeline stages */
53 draw
->pipeline
.wide_line
= draw_wide_line_stage( draw
);
54 draw
->pipeline
.wide_point
= draw_wide_point_stage( draw
);
55 draw
->pipeline
.stipple
= draw_stipple_stage( draw
);
56 draw
->pipeline
.unfilled
= draw_unfilled_stage( draw
);
57 draw
->pipeline
.twoside
= draw_twoside_stage( draw
);
58 draw
->pipeline
.offset
= draw_offset_stage( draw
);
59 draw
->pipeline
.clip
= draw_clip_stage( draw
);
60 draw
->pipeline
.flatshade
= draw_flatshade_stage( draw
);
61 draw
->pipeline
.cull
= draw_cull_stage( draw
);
62 draw
->pipeline
.validate
= draw_validate_stage( draw
);
63 draw
->pipeline
.first
= draw
->pipeline
.validate
;
65 if (!draw
->pipeline
.wide_line
||
66 !draw
->pipeline
.wide_point
||
67 !draw
->pipeline
.stipple
||
68 !draw
->pipeline
.unfilled
||
69 !draw
->pipeline
.twoside
||
70 !draw
->pipeline
.offset
||
71 !draw
->pipeline
.clip
||
72 !draw
->pipeline
.flatshade
||
73 !draw
->pipeline
.cull
||
74 !draw
->pipeline
.validate
)
78 ASSIGN_4V( draw
->plane
[0], -1, 0, 0, 1 );
79 ASSIGN_4V( draw
->plane
[1], 1, 0, 0, 1 );
80 ASSIGN_4V( draw
->plane
[2], 0, -1, 0, 1 );
81 ASSIGN_4V( draw
->plane
[3], 0, 1, 0, 1 );
82 ASSIGN_4V( draw
->plane
[4], 0, 0, 1, 1 ); /* yes these are correct */
83 ASSIGN_4V( draw
->plane
[5], 0, 0, -1, 1 ); /* mesa's a bit wonky */
86 /* Statically allocate maximum sized vertices for the cache - could be cleverer...
90 const unsigned size
= (MAX_VERTEX_SIZE
+ 0x0f) & ~0x0f;
91 char *tmp
= align_malloc(Elements(draw
->vs
.queue
) * size
, 16);
95 for (i
= 0; i
< Elements(draw
->vs
.queue
); i
++)
96 draw
->vs
.queue
[i
].vertex
= (struct vertex_header
*)(tmp
+ i
* size
);
99 draw
->shader_queue_flush
= draw_vertex_shader_queue_flush
;
101 /* these defaults are oriented toward the needs of softpipe */
102 draw
->wide_point_threshold
= 1000000.0; /* infinity */
103 draw
->wide_line_threshold
= 1.0;
104 draw
->line_stipple
= TRUE
;
105 draw
->point_sprite
= TRUE
;
107 draw
->reduced_prim
= ~0; /* != any of PIPE_PRIM_x */
109 draw_vertex_cache_invalidate( draw
);
110 draw_set_mapped_element_buffer( draw
, 0, NULL
);
112 if (!draw_pt_init( draw
))
118 draw_destroy( draw
);
123 void draw_destroy( struct draw_context
*draw
)
128 if (draw
->pipeline
.wide_line
)
129 draw
->pipeline
.wide_line
->destroy( draw
->pipeline
.wide_line
);
130 if (draw
->pipeline
.wide_point
)
131 draw
->pipeline
.wide_point
->destroy( draw
->pipeline
.wide_point
);
132 if (draw
->pipeline
.stipple
)
133 draw
->pipeline
.stipple
->destroy( draw
->pipeline
.stipple
);
134 if (draw
->pipeline
.unfilled
)
135 draw
->pipeline
.unfilled
->destroy( draw
->pipeline
.unfilled
);
136 if (draw
->pipeline
.twoside
)
137 draw
->pipeline
.twoside
->destroy( draw
->pipeline
.twoside
);
138 if (draw
->pipeline
.offset
)
139 draw
->pipeline
.offset
->destroy( draw
->pipeline
.offset
);
140 if (draw
->pipeline
.clip
)
141 draw
->pipeline
.clip
->destroy( draw
->pipeline
.clip
);
142 if (draw
->pipeline
.flatshade
)
143 draw
->pipeline
.flatshade
->destroy( draw
->pipeline
.flatshade
);
144 if (draw
->pipeline
.cull
)
145 draw
->pipeline
.cull
->destroy( draw
->pipeline
.cull
);
146 if (draw
->pipeline
.validate
)
147 draw
->pipeline
.validate
->destroy( draw
->pipeline
.validate
);
148 if (draw
->pipeline
.aaline
)
149 draw
->pipeline
.aaline
->destroy( draw
->pipeline
.aaline
);
150 if (draw
->pipeline
.aapoint
)
151 draw
->pipeline
.aapoint
->destroy( draw
->pipeline
.aapoint
);
152 if (draw
->pipeline
.pstipple
)
153 draw
->pipeline
.pstipple
->destroy( draw
->pipeline
.pstipple
);
154 if (draw
->pipeline
.rasterize
)
155 draw
->pipeline
.rasterize
->destroy( draw
->pipeline
.rasterize
);
157 tgsi_exec_machine_free_data(&draw
->machine
);
159 if (draw
->vs
.queue
[0].vertex
)
160 align_free( draw
->vs
.queue
[0].vertex
); /* Frees all the vertices. */
162 /* Not so fast -- we're just borrowing this at the moment.
165 draw->render->destroy( draw->render );
168 draw_pt_destroy( draw
);
175 void draw_flush( struct draw_context
*draw
)
177 draw_do_flush( draw
, DRAW_FLUSH_BACKEND
);
183 * Register new primitive rasterization/rendering state.
184 * This causes the drawing pipeline to be rebuilt.
186 void draw_set_rasterizer_state( struct draw_context
*draw
,
187 const struct pipe_rasterizer_state
*raster
)
189 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
191 draw
->rasterizer
= raster
;
196 * Plug in the primitive rendering/rasterization stage (which is the last
197 * stage in the drawing pipeline).
198 * This is provided by the device driver.
200 void draw_set_rasterize_stage( struct draw_context
*draw
,
201 struct draw_stage
*stage
)
203 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
205 draw
->pipeline
.rasterize
= stage
;
210 * Set the draw module's clipping state.
212 void draw_set_clip_state( struct draw_context
*draw
,
213 const struct pipe_clip_state
*clip
)
215 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
217 assert(clip
->nr
<= PIPE_MAX_CLIP_PLANES
);
218 memcpy(&draw
->plane
[6], clip
->ucp
, clip
->nr
* sizeof(clip
->ucp
[0]));
219 draw
->nr_planes
= 6 + clip
->nr
;
224 * Set the draw module's viewport state.
226 void draw_set_viewport_state( struct draw_context
*draw
,
227 const struct pipe_viewport_state
*viewport
)
229 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
230 draw
->viewport
= *viewport
; /* struct copy */
231 draw
->identity_viewport
= (viewport
->scale
[0] == 1.0f
&&
232 viewport
->scale
[1] == 1.0f
&&
233 viewport
->scale
[2] == 1.0f
&&
234 viewport
->scale
[3] == 1.0f
&&
235 viewport
->translate
[0] == 0.0f
&&
236 viewport
->translate
[1] == 0.0f
&&
237 viewport
->translate
[2] == 0.0f
&&
238 viewport
->translate
[3] == 0.0f
);
244 draw_set_vertex_buffers(struct draw_context
*draw
,
246 const struct pipe_vertex_buffer
*buffers
)
248 assert(count
<= PIPE_MAX_ATTRIBS
);
250 draw_do_flush( draw
, DRAW_FLUSH_VERTEX_CACHE
/*STATE_CHANGE*/ );
252 memcpy(draw
->vertex_buffer
, buffers
, count
* sizeof(buffers
[0]));
257 draw_set_vertex_elements(struct draw_context
*draw
,
259 const struct pipe_vertex_element
*elements
)
261 assert(count
<= PIPE_MAX_ATTRIBS
);
263 draw_do_flush( draw
, DRAW_FLUSH_VERTEX_CACHE
/*STATE_CHANGE*/ );
265 memcpy(draw
->vertex_element
, elements
, count
* sizeof(elements
[0]));
270 * Tell drawing context where to find mapped vertex buffers.
273 draw_set_mapped_vertex_buffer(struct draw_context
*draw
,
274 unsigned attr
, const void *buffer
)
276 draw_do_flush( draw
, DRAW_FLUSH_VERTEX_CACHE
/*STATE_CHANGE*/ );
277 draw
->user
.vbuffer
[attr
] = buffer
;
282 draw_set_mapped_constant_buffer(struct draw_context
*draw
,
285 draw_do_flush( draw
, DRAW_FLUSH_VERTEX_CACHE
/*STATE_CHANGE*/ );
286 draw
->user
.constants
= buffer
;
291 * Tells the draw module to draw points with triangles if their size
292 * is greater than this threshold.
295 draw_wide_point_threshold(struct draw_context
*draw
, float threshold
)
297 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
298 draw
->wide_point_threshold
= threshold
;
303 * Tells the draw module to draw lines with triangles if their width
304 * is greater than this threshold.
307 draw_wide_line_threshold(struct draw_context
*draw
, float threshold
)
309 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
310 draw
->wide_line_threshold
= threshold
;
315 * Tells the draw module whether or not to implement line stipple.
318 draw_enable_line_stipple(struct draw_context
*draw
, boolean enable
)
320 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
321 draw
->line_stipple
= enable
;
326 * Tells draw module whether to convert points to quads for sprite mode.
329 draw_enable_point_sprites(struct draw_context
*draw
, boolean enable
)
331 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
332 draw
->point_sprite
= enable
;
337 * Ask the draw module for the location/slot of the given vertex attribute in
338 * a post-transformed vertex.
340 * With this function, drivers that use the draw module should have no reason
341 * to track the current vertex shader.
343 * Note that the draw module may sometimes generate vertices with extra
344 * attributes (such as texcoords for AA lines). The driver can call this
345 * function to find those attributes.
347 * Zero is returned if the attribute is not found since this is
348 * a don't care / undefined situtation. Returning -1 would be a bit more
349 * work for the drivers.
352 draw_find_vs_output(struct draw_context
*draw
,
353 uint semantic_name
, uint semantic_index
)
355 const struct draw_vertex_shader
*vs
= draw
->vertex_shader
;
357 for (i
= 0; i
< vs
->info
.num_outputs
; i
++) {
358 if (vs
->info
.output_semantic_name
[i
] == semantic_name
&&
359 vs
->info
.output_semantic_index
[i
] == semantic_index
)
363 /* XXX there may be more than one extra vertex attrib.
364 * For example, simulated gl_FragCoord and gl_PointCoord.
366 if (draw
->extra_vp_outputs
.semantic_name
== semantic_name
&&
367 draw
->extra_vp_outputs
.semantic_index
== semantic_index
) {
368 return draw
->extra_vp_outputs
.slot
;
375 * Return number of vertex shader outputs.
378 draw_num_vs_outputs(struct draw_context
*draw
)
380 uint count
= draw
->vertex_shader
->info
.num_outputs
;
381 if (draw
->extra_vp_outputs
.slot
> 0)
388 * Allocate space for temporary post-transform vertices, such as for clipping.
390 void draw_alloc_temp_verts( struct draw_stage
*stage
, unsigned nr
)
397 ubyte
*store
= (ubyte
*) MALLOC( MAX_VERTEX_SIZE
* nr
);
400 stage
->tmp
= (struct vertex_header
**) MALLOC( sizeof(struct vertex_header
*) * nr
);
402 for (i
= 0; i
< nr
; i
++)
403 stage
->tmp
[i
] = (struct vertex_header
*)(store
+ i
* MAX_VERTEX_SIZE
);
408 void draw_free_temp_verts( struct draw_stage
*stage
)
411 FREE( stage
->tmp
[0] );
418 boolean
draw_use_sse(struct draw_context
*draw
)
420 return (boolean
) draw
->use_sse
;
424 void draw_reset_vertex_ids(struct draw_context
*draw
)
426 struct draw_stage
*stage
= draw
->pipeline
.first
;
431 for (i
= 0; i
< stage
->nr_tmps
; i
++)
432 stage
->tmp
[i
]->vertex_id
= UNDEFINED_VERTEX_ID
;
437 draw_vertex_cache_reset_vertex_ids(draw
); /* going away soon */
438 draw_pt_reset_vertex_ids(draw
);
442 void draw_set_render( struct draw_context
*draw
,
443 struct vbuf_render
*render
)
445 draw
->render
= render
;