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
40boolean 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
78void 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 */
115static 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 */
132static 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 */
152static 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 */
226void 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 */
313void 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
346void 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