1 /**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
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 VMWARE 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 <keithw@vmware.com>
31 */
32
33 #include "draw/draw_private.h"
34 #include "draw/draw_pipe.h"
35 #include "util/u_debug.h"
36 #include "util/u_math.h"
37
38
39
draw_pipeline_init(struct draw_context * draw)40 boolean draw_pipeline_init( struct draw_context *draw )
41 {
42 /* create pipeline stages */
43 draw->pipeline.wide_line = draw_wide_line_stage( draw );
44 draw->pipeline.wide_point = draw_wide_point_stage( draw );
45 draw->pipeline.stipple = draw_stipple_stage( draw );
46 draw->pipeline.unfilled = draw_unfilled_stage( draw );
47 draw->pipeline.twoside = draw_twoside_stage( draw );
48 draw->pipeline.offset = draw_offset_stage( draw );
49 draw->pipeline.clip = draw_clip_stage( draw );
50 draw->pipeline.flatshade = draw_flatshade_stage( draw );
51 draw->pipeline.cull = draw_cull_stage( draw );
52 draw->pipeline.validate = draw_validate_stage( draw );
53 draw->pipeline.first = draw->pipeline.validate;
54
55 if (!draw->pipeline.wide_line ||
56 !draw->pipeline.wide_point ||
57 !draw->pipeline.stipple ||
58 !draw->pipeline.unfilled ||
59 !draw->pipeline.twoside ||
60 !draw->pipeline.offset ||
61 !draw->pipeline.clip ||
62 !draw->pipeline.flatshade ||
63 !draw->pipeline.cull ||
64 !draw->pipeline.validate)
65 return FALSE;
66
67 /* these defaults are oriented toward the needs of softpipe */
68 draw->pipeline.wide_point_threshold = 1000000.0f; /* infinity */
69 draw->pipeline.wide_line_threshold = 1.0f;
70 draw->pipeline.wide_point_sprites = FALSE;
71 draw->pipeline.line_stipple = TRUE;
72 draw->pipeline.point_sprite = TRUE;
73
74 return TRUE;
75 }
76
77
draw_pipeline_destroy(struct draw_context * draw)78 void draw_pipeline_destroy( struct draw_context *draw )
79 {
80 if (draw->pipeline.wide_line)
81 draw->pipeline.wide_line->destroy( draw->pipeline.wide_line );
82 if (draw->pipeline.wide_point)
83 draw->pipeline.wide_point->destroy( draw->pipeline.wide_point );
84 if (draw->pipeline.stipple)
85 draw->pipeline.stipple->destroy( draw->pipeline.stipple );
86 if (draw->pipeline.unfilled)
87 draw->pipeline.unfilled->destroy( draw->pipeline.unfilled );
88 if (draw->pipeline.twoside)
89 draw->pipeline.twoside->destroy( draw->pipeline.twoside );
90 if (draw->pipeline.offset)
91 draw->pipeline.offset->destroy( draw->pipeline.offset );
92 if (draw->pipeline.clip)
93 draw->pipeline.clip->destroy( draw->pipeline.clip );
94 if (draw->pipeline.flatshade)
95 draw->pipeline.flatshade->destroy( draw->pipeline.flatshade );
96 if (draw->pipeline.cull)
97 draw->pipeline.cull->destroy( draw->pipeline.cull );
98 if (draw->pipeline.validate)
99 draw->pipeline.validate->destroy( draw->pipeline.validate );
100 if (draw->pipeline.aaline)
101 draw->pipeline.aaline->destroy( draw->pipeline.aaline );
102 if (draw->pipeline.aapoint)
103 draw->pipeline.aapoint->destroy( draw->pipeline.aapoint );
104 if (draw->pipeline.pstipple)
105 draw->pipeline.pstipple->destroy( draw->pipeline.pstipple );
106 if (draw->pipeline.rasterize)
107 draw->pipeline.rasterize->destroy( draw->pipeline.rasterize );
108 }
109
110
111
112 /**
113 * Build primitive to render a point with vertex at v0.
114 */
do_point(struct draw_context * draw,const char * v0)115 static void do_point( struct draw_context *draw,
116 const char *v0 )
117 {
118 struct prim_header prim;
119
120 prim.flags = 0;
121 prim.pad = 0;
122 prim.v[0] = (struct vertex_header *)v0;
123
124 draw->pipeline.first->point( draw->pipeline.first, &prim );
125 }
126
127
128 /**
129 * Build primitive to render a line with vertices at v0, v1.
130 * \param flags bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
131 */
do_line(struct draw_context * draw,ushort flags,const char * v0,const char * v1)132 static void do_line( struct draw_context *draw,
133 ushort flags,
134 const char *v0,
135 const char *v1 )
136 {
137 struct prim_header prim;
138
139 prim.flags = flags;
140 prim.pad = 0;
141 prim.v[0] = (struct vertex_header *)v0;
142 prim.v[1] = (struct vertex_header *)v1;
143
144 draw->pipeline.first->line( draw->pipeline.first, &prim );
145 }
146
147
148 /**
149 * Build primitive to render a triangle with vertices at v0, v1, v2.
150 * \param flags bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
151 */
do_triangle(struct draw_context * draw,ushort flags,char * v0,char * v1,char * v2)152 static void do_triangle( struct draw_context *draw,
153 ushort flags,
154 char *v0,
155 char *v1,
156 char *v2 )
157 {
158 struct prim_header prim;
159
160 prim.v[0] = (struct vertex_header *)v0;
161 prim.v[1] = (struct vertex_header *)v1;
162 prim.v[2] = (struct vertex_header *)v2;
163 prim.flags = flags;
164 prim.pad = 0;
165
166 draw->pipeline.first->tri( draw->pipeline.first, &prim );
167 }
168
169
170 /*
171 * Set up macros for draw_pt_decompose.h template code.
172 * This code uses vertex indexes / elements.
173 */
174
175 #define TRIANGLE(flags,i0,i1,i2) \
176 do { \
177 do_triangle( draw, \
178 flags, \
179 verts + stride * (i0), \
180 verts + stride * (i1), \
181 verts + stride * (i2) ); \
182 } while (0)
183
184 #define LINE(flags,i0,i1) \
185 do { \
186 do_line( draw, \
187 flags, \
188 verts + stride * (i0), \
189 verts + stride * (i1) ); \
190 } while (0)
191
192 #define POINT(i0) \
193 do { \
194 do_point( draw, verts + stride * (i0) ); \
195 } while (0)
196
197 #define GET_ELT(idx) (MIN2(elts[idx], max_index))
198
199 #define FUNC pipe_run_elts
200 #define FUNC_VARS \
201 struct draw_context *draw, \
202 unsigned prim, \
203 unsigned prim_flags, \
204 struct vertex_header *vertices, \
205 unsigned stride, \
206 const ushort *elts, \
207 unsigned count, \
208 unsigned max_index
209
210 #include "draw_pt_decompose.h"
211
212
213
214 /**
215 * Code to run the pipeline on a fairly arbitrary collection of vertices.
216 * For drawing indexed primitives.
217 *
218 * Vertex headers must be pre-initialized with the
219 * UNDEFINED_VERTEX_ID, this code will cause that id to become
220 * overwritten, so it may have to be reset if there is the intention
221 * to reuse the vertices.
222 *
223 * This code provides a callback to reset the vertex id's which the
224 * draw_vbuf.c code uses when it has to perform a flush.
225 */
draw_pipeline_run(struct draw_context * draw,const struct draw_vertex_info * vert_info,const struct draw_prim_info * prim_info)226 void draw_pipeline_run( struct draw_context *draw,
227 const struct draw_vertex_info *vert_info,
228 const struct draw_prim_info *prim_info)
229 {
230 unsigned i, start;
231
232 draw->pipeline.verts = (char *)vert_info->verts;
233 draw->pipeline.vertex_stride = vert_info->stride;
234 draw->pipeline.vertex_count = vert_info->count;
235
236 for (start = i = 0;
237 i < prim_info->primitive_count;
238 start += prim_info->primitive_lengths[i], i++)
239 {
240 const unsigned count = prim_info->primitive_lengths[i];
241
242 #if DEBUG
243 /* Warn if one of the element indexes go outside the vertex buffer */
244 {
245 unsigned max_index = 0x0, i;
246 /* find the largest element index */
247 for (i = 0; i < count; i++) {
248 unsigned int index = prim_info->elts[start + i];
249 if (index > max_index)
250 max_index = index;
251 }
252 if (max_index >= vert_info->count) {
253 debug_printf("%s: max_index (%u) outside vertex buffer (%u)\n",
254 __FUNCTION__,
255 max_index,
256 vert_info->count);
257 }
258 }
259 #endif
260
261 pipe_run_elts(draw,
262 prim_info->prim,
263 prim_info->flags,
264 vert_info->verts,
265 vert_info->stride,
266 prim_info->elts + start,
267 count,
268 vert_info->count - 1);
269 }
270
271 draw->pipeline.verts = NULL;
272 draw->pipeline.vertex_count = 0;
273 }
274
275
276 /*
277 * Set up macros for draw_pt_decompose.h template code.
278 * This code is for non-indexed (aka linear) rendering (no elts).
279 */
280
281 #define TRIANGLE(flags,i0,i1,i2) \
282 do_triangle( draw, flags, \
283 verts + stride * (i0), \
284 verts + stride * (i1), \
285 verts + stride * (i2) )
286
287 #define LINE(flags,i0,i1) \
288 do_line( draw, flags, \
289 verts + stride * (i0), \
290 verts + stride * (i1) )
291
292 #define POINT(i0) \
293 do_point( draw, verts + stride * (i0) )
294
295
296 #define GET_ELT(idx) (idx)
297
298 #define FUNC pipe_run_linear
299 #define FUNC_VARS \
300 struct draw_context *draw, \
301 unsigned prim, \
302 unsigned prim_flags, \
303 struct vertex_header *vertices, \
304 unsigned stride, \
305 unsigned count
306
307 #include "draw_pt_decompose.h"
308
309
310 /*
311 * For drawing non-indexed primitives.
312 */
draw_pipeline_run_linear(struct draw_context * draw,const struct draw_vertex_info * vert_info,const struct draw_prim_info * prim_info)313 void draw_pipeline_run_linear( struct draw_context *draw,
314 const struct draw_vertex_info *vert_info,
315 const struct draw_prim_info *prim_info)
316 {
317 unsigned i, start;
318
319 for (start = i = 0;
320 i < prim_info->primitive_count;
321 start += prim_info->primitive_lengths[i], i++)
322 {
323 unsigned count = prim_info->primitive_lengths[i];
324 char *verts = ((char*)vert_info->verts) +
325 (start * vert_info->stride);
326
327 draw->pipeline.verts = verts;
328 draw->pipeline.vertex_stride = vert_info->stride;
329 draw->pipeline.vertex_count = count;
330
331 assert(count <= vert_info->count);
332
333 pipe_run_linear(draw,
334 prim_info->prim,
335 prim_info->flags,
336 (struct vertex_header*)verts,
337 vert_info->stride,
338 count);
339 }
340
341 draw->pipeline.verts = NULL;
342 draw->pipeline.vertex_count = 0;
343 }
344
345
draw_pipeline_flush(struct draw_context * draw,unsigned flags)346 void draw_pipeline_flush( struct draw_context *draw,
347 unsigned flags )
348 {
349 draw->pipeline.first->flush( draw->pipeline.first, flags );
350 if (flags & DRAW_FLUSH_STATE_CHANGE)
351 draw->pipeline.first = draw->pipeline.validate;
352 }
353