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Merge remote branch 'origin/master' into nv50-compiler
[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 #define TRIANGLE(flags,i0,i1,i2) \
175 do { \
176 do_triangle( draw, \
177 flags, \
178 verts + stride * (i0), \
179 verts + stride * (i1), \
180 verts + stride * (i2) ); \
181 } while (0)
182
183 #define LINE(flags,i0,i1) \
184 do { \
185 do_line( draw, \
186 flags, \
187 verts + stride * (i0), \
188 verts + stride * (i1) ); \
189 } while (0)
190
191 #define POINT(i0) \
192 do { \
193 do_point( draw, verts + stride * (i0) ); \
194 } while (0)
195
196 #define GET_ELT(idx) (elts[idx])
197
198 #define FUNC pipe_run_elts
199 #define FUNC_VARS \
200 struct draw_context *draw, \
201 unsigned prim, \
202 unsigned prim_flags, \
203 struct vertex_header *vertices, \
204 unsigned stride, \
205 const ushort *elts, \
206 unsigned count
207
208 #include "draw_pt_decompose.h"
209
210
211
212 /**
213 * Code to run the pipeline on a fairly arbitrary collection of vertices.
214 * For drawing indexed primitives.
215 *
216 * Vertex headers must be pre-initialized with the
217 * UNDEFINED_VERTEX_ID, this code will cause that id to become
218 * overwritten, so it may have to be reset if there is the intention
219 * to reuse the vertices.
220 *
221 * This code provides a callback to reset the vertex id's which the
222 * draw_vbuf.c code uses when it has to perform a flush.
223 */
224 void draw_pipeline_run( struct draw_context *draw,
225 const struct draw_vertex_info *vert_info,
226 const struct draw_prim_info *prim_info)
227 {
228 unsigned i, start;
229
230 draw->pipeline.verts = (char *)vert_info->verts;
231 draw->pipeline.vertex_stride = vert_info->stride;
232 draw->pipeline.vertex_count = vert_info->count;
233
234 for (start = i = 0;
235 i < prim_info->primitive_count;
236 start += prim_info->primitive_lengths[i], i++)
237 {
238 const unsigned count = prim_info->primitive_lengths[i];
239
240 #if DEBUG
241 /* Warn if one of the element indexes go outside the vertex buffer */
242 {
243 unsigned max_index = 0x0, i;
244 /* find the largest element index */
245 for (i = 0; i < count; i++) {
246 unsigned int index = prim_info->elts[start + i];
247 if (index > max_index)
248 max_index = index;
249 }
250 if (max_index >= vert_info->count) {
251 debug_printf("%s: max_index (%u) outside vertex buffer (%u)\n",
252 __FUNCTION__,
253 max_index,
254 vert_info->count);
255 }
256 }
257 #endif
258
259 pipe_run_elts(draw,
260 prim_info->prim,
261 prim_info->flags,
262 vert_info->verts,
263 vert_info->stride,
264 prim_info->elts + start,
265 count);
266 }
267
268 draw->pipeline.verts = NULL;
269 draw->pipeline.vertex_count = 0;
270 }
271
272
273 /*
274 * Set up macros for draw_pt_decompose.h template code.
275 * This code is for non-indexed (aka linear) rendering (no elts).
276 */
277
278 #define TRIANGLE(flags,i0,i1,i2) \
279 do_triangle( draw, flags, \
280 verts + stride * (i0), \
281 verts + stride * (i1), \
282 verts + stride * (i2) )
283
284 #define LINE(flags,i0,i1) \
285 do_line( draw, flags, \
286 verts + stride * (i0), \
287 verts + stride * (i1) )
288
289 #define POINT(i0) \
290 do_point( draw, verts + stride * (i0) )
291
292
293 #define GET_ELT(idx) (idx)
294
295 #define FUNC pipe_run_linear
296 #define FUNC_VARS \
297 struct draw_context *draw, \
298 unsigned prim, \
299 unsigned prim_flags, \
300 struct vertex_header *vertices, \
301 unsigned stride, \
302 unsigned count
303
304 #include "draw_pt_decompose.h"
305
306
307 /*
308 * For drawing non-indexed primitives.
309 */
310 void draw_pipeline_run_linear( struct draw_context *draw,
311 const struct draw_vertex_info *vert_info,
312 const struct draw_prim_info *prim_info)
313 {
314 unsigned i, start;
315
316 for (start = i = 0;
317 i < prim_info->primitive_count;
318 start += prim_info->primitive_lengths[i], i++)
319 {
320 unsigned count = prim_info->primitive_lengths[i];
321 char *verts = ((char*)vert_info->verts) +
322 (start * vert_info->stride);
323
324 draw->pipeline.verts = verts;
325 draw->pipeline.vertex_stride = vert_info->stride;
326 draw->pipeline.vertex_count = count;
327
328 assert(count <= vert_info->count);
329
330 pipe_run_linear(draw,
331 prim_info->prim,
332 prim_info->flags,
333 (struct vertex_header*)verts,
334 vert_info->stride,
335 count);
336 }
337
338 draw->pipeline.verts = NULL;
339 draw->pipeline.vertex_count = 0;
340 }
341
342
343 void draw_pipeline_flush( struct draw_context *draw,
344 unsigned flags )
345 {
346 draw->pipeline.first->flush( draw->pipeline.first, flags );
347 draw->pipeline.first = draw->pipeline.validate;
348 }