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draw wip
[mesa.git] / src / gallium / auxiliary / draw / draw_pipe.c
1 /**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
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:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
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.
25 *
26 **************************************************************************/
27
28 /*
29 * Authors:
30 * Keith Whitwell <keith@tungstengraphics.com>
31 */
32
33 #include "draw/draw_private.h"
34 #include "draw/draw_pipe.h"
35 #include "util/u_debug.h"
36
37
38
39 boolean draw_pipeline_init( struct draw_context *draw )
40 {
41 /* create pipeline stages */
42 draw->pipeline.wide_line = draw_wide_line_stage( draw );
43 draw->pipeline.wide_point = draw_wide_point_stage( draw );
44 draw->pipeline.stipple = draw_stipple_stage( draw );
45 draw->pipeline.unfilled = draw_unfilled_stage( draw );
46 draw->pipeline.twoside = draw_twoside_stage( draw );
47 draw->pipeline.offset = draw_offset_stage( draw );
48 draw->pipeline.clip = draw_clip_stage( draw );
49 draw->pipeline.flatshade = draw_flatshade_stage( draw );
50 draw->pipeline.cull = draw_cull_stage( draw );
51 draw->pipeline.validate = draw_validate_stage( draw );
52 draw->pipeline.first = draw->pipeline.validate;
53
54 if (!draw->pipeline.wide_line ||
55 !draw->pipeline.wide_point ||
56 !draw->pipeline.stipple ||
57 !draw->pipeline.unfilled ||
58 !draw->pipeline.twoside ||
59 !draw->pipeline.offset ||
60 !draw->pipeline.clip ||
61 !draw->pipeline.flatshade ||
62 !draw->pipeline.cull ||
63 !draw->pipeline.validate)
64 return FALSE;
65
66 /* these defaults are oriented toward the needs of softpipe */
67 draw->pipeline.wide_point_threshold = 1000000.0; /* infinity */
68 draw->pipeline.wide_line_threshold = 1.0;
69 draw->pipeline.wide_point_sprites = FALSE;
70 draw->pipeline.line_stipple = TRUE;
71 draw->pipeline.point_sprite = TRUE;
72
73 return TRUE;
74 }
75
76
77 void draw_pipeline_destroy( struct draw_context *draw )
78 {
79 if (draw->pipeline.wide_line)
80 draw->pipeline.wide_line->destroy( draw->pipeline.wide_line );
81 if (draw->pipeline.wide_point)
82 draw->pipeline.wide_point->destroy( draw->pipeline.wide_point );
83 if (draw->pipeline.stipple)
84 draw->pipeline.stipple->destroy( draw->pipeline.stipple );
85 if (draw->pipeline.unfilled)
86 draw->pipeline.unfilled->destroy( draw->pipeline.unfilled );
87 if (draw->pipeline.twoside)
88 draw->pipeline.twoside->destroy( draw->pipeline.twoside );
89 if (draw->pipeline.offset)
90 draw->pipeline.offset->destroy( draw->pipeline.offset );
91 if (draw->pipeline.clip)
92 draw->pipeline.clip->destroy( draw->pipeline.clip );
93 if (draw->pipeline.flatshade)
94 draw->pipeline.flatshade->destroy( draw->pipeline.flatshade );
95 if (draw->pipeline.cull)
96 draw->pipeline.cull->destroy( draw->pipeline.cull );
97 if (draw->pipeline.validate)
98 draw->pipeline.validate->destroy( draw->pipeline.validate );
99 if (draw->pipeline.aaline)
100 draw->pipeline.aaline->destroy( draw->pipeline.aaline );
101 if (draw->pipeline.aapoint)
102 draw->pipeline.aapoint->destroy( draw->pipeline.aapoint );
103 if (draw->pipeline.pstipple)
104 draw->pipeline.pstipple->destroy( draw->pipeline.pstipple );
105 if (draw->pipeline.rasterize)
106 draw->pipeline.rasterize->destroy( draw->pipeline.rasterize );
107 }
108
109
110
111 /**
112 * Build primitive to render a point with vertex at v0.
113 */
114 static void do_point( struct draw_context *draw,
115 const char *v0 )
116 {
117 struct prim_header prim;
118
119 prim.flags = 0;
120 prim.pad = 0;
121 prim.v[0] = (struct vertex_header *)v0;
122
123 draw->pipeline.first->point( draw->pipeline.first, &prim );
124 }
125
126
127 /**
128 * Build primitive to render a line with vertices at v0, v1.
129 * \param flags bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
130 */
131 static void do_line( struct draw_context *draw,
132 ushort flags,
133 const char *v0,
134 const char *v1 )
135 {
136 struct prim_header prim;
137
138 prim.flags = flags;
139 prim.pad = 0;
140 prim.v[0] = (struct vertex_header *)v0;
141 prim.v[1] = (struct vertex_header *)v1;
142
143 draw->pipeline.first->line( draw->pipeline.first, &prim );
144 }
145
146
147 /**
148 * Build primitive to render a triangle with vertices at v0, v1, v2.
149 * \param flags bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
150 */
151 static void do_triangle( struct draw_context *draw,
152 ushort flags,
153 char *v0,
154 char *v1,
155 char *v2 )
156 {
157 struct prim_header prim;
158
159 prim.v[0] = (struct vertex_header *)v0;
160 prim.v[1] = (struct vertex_header *)v1;
161 prim.v[2] = (struct vertex_header *)v2;
162 prim.flags = flags;
163 prim.pad = 0;
164
165 draw->pipeline.first->tri( draw->pipeline.first, &prim );
166 }
167
168
169 /*
170 * Set up macros for draw_pt_decompose.h template code.
171 * This code uses vertex indexes / elements.
172 */
173
174 /* emit first quad vertex as first vertex in triangles */
175 #define QUAD_FIRST_PV(i0,i1,i2,i3) \
176 do_triangle( draw, \
177 ( DRAW_PIPE_RESET_STIPPLE | \
178 DRAW_PIPE_EDGE_FLAG_0 | \
179 DRAW_PIPE_EDGE_FLAG_1 ), \
180 verts + stride * elts[i0], \
181 verts + stride * elts[i1], \
182 verts + stride * elts[i2]); \
183 do_triangle( draw, \
184 ( DRAW_PIPE_EDGE_FLAG_1 | \
185 DRAW_PIPE_EDGE_FLAG_2 ), \
186 verts + stride * elts[i0], \
187 verts + stride * elts[i2], \
188 verts + stride * elts[i3])
189
190 /* emit last quad vertex as last vertex in triangles */
191 #define QUAD_LAST_PV(i0,i1,i2,i3) \
192 do_triangle( draw, \
193 ( DRAW_PIPE_RESET_STIPPLE | \
194 DRAW_PIPE_EDGE_FLAG_0 | \
195 DRAW_PIPE_EDGE_FLAG_2 ), \
196 verts + stride * elts[i0], \
197 verts + stride * elts[i1], \
198 verts + stride * elts[i3]); \
199 do_triangle( draw, \
200 ( DRAW_PIPE_EDGE_FLAG_0 | \
201 DRAW_PIPE_EDGE_FLAG_1 ), \
202 verts + stride * elts[i1], \
203 verts + stride * elts[i2], \
204 verts + stride * elts[i3])
205
206 #define TRIANGLE(flags,i0,i1,i2) \
207 do_triangle( draw, \
208 elts[i0], /* flags */ \
209 verts + stride * (elts[i0] & ~DRAW_PIPE_FLAG_MASK), \
210 verts + stride * (elts[i1] & ~DRAW_PIPE_FLAG_MASK), \
211 verts + stride * (elts[i2] & ~DRAW_PIPE_FLAG_MASK) );
212
213 #define LINE(flags,i0,i1) \
214 do_line( draw, \
215 elts[i0], \
216 verts + stride * (elts[i0] & ~DRAW_PIPE_FLAG_MASK), \
217 verts + stride * (elts[i1] & ~DRAW_PIPE_FLAG_MASK) );
218
219 #define POINT(i0) \
220 do_point( draw, \
221 verts + stride * elts[i0] )
222
223 #define FUNC pipe_run
224 #define ARGS \
225 struct draw_context *draw, \
226 unsigned prim, \
227 struct vertex_header *vertices, \
228 unsigned stride, \
229 const ushort *elts
230
231 #define LOCAL_VARS \
232 char *verts = (char *)vertices; \
233 boolean flatfirst = (draw->rasterizer->flatshade && \
234 draw->rasterizer->flatshade_first); \
235 unsigned i; \
236 ushort flags
237
238 #define FLUSH
239
240 #include "draw_pt_decompose.h"
241 #undef ARGS
242 #undef LOCAL_VARS
243
244
245
246 /**
247 * Code to run the pipeline on a fairly arbitrary collection of vertices.
248 * For drawing indexed primitives.
249 *
250 * Vertex headers must be pre-initialized with the
251 * UNDEFINED_VERTEX_ID, this code will cause that id to become
252 * overwritten, so it may have to be reset if there is the intention
253 * to reuse the vertices.
254 *
255 * This code provides a callback to reset the vertex id's which the
256 * draw_vbuf.c code uses when it has to perform a flush.
257 */
258 void draw_pipeline_run( struct draw_context *draw,
259 const struct draw_vertex_info *vert_info,
260 const struct draw_prim_info *prim_info)
261 {
262 unsigned i, start;
263
264 draw->pipeline.verts = (char *)vert_info->verts;
265 draw->pipeline.vertex_stride = vert_info->stride;
266 draw->pipeline.vertex_count = vert_info->count;
267
268 for (start = i = 0;
269 i < prim_info->primitive_count;
270 start += prim_info->primitive_lengths[i], i++)
271 {
272 unsigned count = prim_info->primitive_lengths[i];
273
274 pipe_run(draw,
275 prim_info->prim,
276 vert_info->verts,
277 vert_info->stride,
278 prim_info->elts + start,
279 count);
280 }
281
282 draw->pipeline.verts = NULL;
283 draw->pipeline.vertex_count = 0;
284 }
285
286
287 /*
288 * Set up macros for draw_pt_decompose.h template code.
289 * This code is for non-indexed (aka linear) rendering (no elts).
290 */
291
292 /* emit first quad vertex as first vertex in triangles */
293 #define QUAD_FIRST_PV(i0,i1,i2,i3) \
294 do_triangle( draw, \
295 ( DRAW_PIPE_RESET_STIPPLE | \
296 DRAW_PIPE_EDGE_FLAG_0 | \
297 DRAW_PIPE_EDGE_FLAG_1 ), \
298 verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK), \
299 verts + stride * (i1), \
300 verts + stride * (i2)); \
301 do_triangle( draw, \
302 ( DRAW_PIPE_EDGE_FLAG_1 | \
303 DRAW_PIPE_EDGE_FLAG_2 ), \
304 verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK), \
305 verts + stride * (i2), \
306 verts + stride * (i3))
307
308 /* emit last quad vertex as last vertex in triangles */
309 #define QUAD_LAST_PV(i0,i1,i2,i3) \
310 do_triangle( draw, \
311 ( DRAW_PIPE_RESET_STIPPLE | \
312 DRAW_PIPE_EDGE_FLAG_0 | \
313 DRAW_PIPE_EDGE_FLAG_2 ), \
314 verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK), \
315 verts + stride * (i1), \
316 verts + stride * (i3)); \
317 do_triangle( draw, \
318 ( DRAW_PIPE_EDGE_FLAG_0 | \
319 DRAW_PIPE_EDGE_FLAG_1 ), \
320 verts + stride * ((i1) & ~DRAW_PIPE_FLAG_MASK), \
321 verts + stride * (i2), \
322 verts + stride * (i3))
323
324 #define TRIANGLE(flags,i0,i1,i2) \
325 do_triangle( draw, \
326 flags, /* flags */ \
327 verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK), \
328 verts + stride * (i1), \
329 verts + stride * (i2))
330
331 #define LINE(flags,i0,i1) \
332 do_line( draw, \
333 flags, \
334 verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK), \
335 verts + stride * (i1))
336
337 #define POINT(i0) \
338 do_point( draw, \
339 verts + stride * i0 )
340
341 #define FUNC pipe_run_linear
342 #define ARGS \
343 struct draw_context *draw, \
344 unsigned prim, \
345 struct vertex_header *vertices, \
346 unsigned stride
347
348 #define LOCAL_VARS \
349 char *verts = (char *)vertices; \
350 boolean flatfirst = (draw->rasterizer->flatshade && \
351 draw->rasterizer->flatshade_first); \
352 unsigned i; \
353 ushort flags
354
355 #define FLUSH
356
357 #include "draw_pt_decompose.h"
358
359
360 /*
361 * For drawing non-indexed primitives.
362 */
363 void draw_pipeline_run_linear( struct draw_context *draw,
364 const struct draw_vertex_info *vert_info,
365 const struct draw_prim_info *prim_info)
366 {
367 unsigned i, start;
368
369 for (start = i = 0;
370 i < prim_info->primitive_count;
371 start += prim_info->primitive_lengths[i], i++)
372 {
373 unsigned count = prim_info->primitive_lengths[i];
374
375 draw->pipeline.verts = (char *)&vert_info->verts[start];
376 draw->pipeline.vertex_stride = vert_info->stride;
377 draw->pipeline.vertex_count = count;
378
379 pipe_run_linear(draw,
380 prim_info->prim,
381 &vert_info->verts[start],
382 vert_info->stride,
383 vert_info->count);
384 }
385
386 draw->pipeline.verts = NULL;
387 draw->pipeline.vertex_count = 0;
388 }
389
390
391 void draw_pipeline_flush( struct draw_context *draw,
392 unsigned flags )
393 {
394 draw->pipeline.first->flush( draw->pipeline.first, flags );
395 draw->pipeline.first = draw->pipeline.validate;
396 }