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.user_cull = draw_user_cull_stage( draw );
53   draw->pipeline.validate  = draw_validate_stage( draw );
54   draw->pipeline.first     = draw->pipeline.validate;
55
56   if (!draw->pipeline.wide_line ||
57       !draw->pipeline.wide_point ||
58       !draw->pipeline.stipple ||
59       !draw->pipeline.unfilled ||
60       !draw->pipeline.twoside ||
61       !draw->pipeline.offset ||
62       !draw->pipeline.clip ||
63       !draw->pipeline.flatshade ||
64       !draw->pipeline.cull ||
65       !draw->pipeline.user_cull ||
66       !draw->pipeline.validate)
67      return FALSE;
68
69   /* these defaults are oriented toward the needs of softpipe */
70   draw->pipeline.wide_point_threshold = 1000000.0f; /* infinity */
71   draw->pipeline.wide_line_threshold = 1.0f;
72   draw->pipeline.wide_point_sprites = FALSE;
73   draw->pipeline.line_stipple = TRUE;
74   draw->pipeline.point_sprite = TRUE;
75
76   return TRUE;
77}
78
79
80void draw_pipeline_destroy( struct draw_context *draw )
81{
82   if (draw->pipeline.wide_line)
83      draw->pipeline.wide_line->destroy( draw->pipeline.wide_line );
84   if (draw->pipeline.wide_point)
85      draw->pipeline.wide_point->destroy( draw->pipeline.wide_point );
86   if (draw->pipeline.stipple)
87      draw->pipeline.stipple->destroy( draw->pipeline.stipple );
88   if (draw->pipeline.unfilled)
89      draw->pipeline.unfilled->destroy( draw->pipeline.unfilled );
90   if (draw->pipeline.twoside)
91      draw->pipeline.twoside->destroy( draw->pipeline.twoside );
92   if (draw->pipeline.offset)
93      draw->pipeline.offset->destroy( draw->pipeline.offset );
94   if (draw->pipeline.clip)
95      draw->pipeline.clip->destroy( draw->pipeline.clip );
96   if (draw->pipeline.flatshade)
97      draw->pipeline.flatshade->destroy( draw->pipeline.flatshade );
98   if (draw->pipeline.cull)
99      draw->pipeline.cull->destroy( draw->pipeline.cull );
100   if (draw->pipeline.user_cull)
101      draw->pipeline.user_cull->destroy( draw->pipeline.user_cull );
102   if (draw->pipeline.validate)
103      draw->pipeline.validate->destroy( draw->pipeline.validate );
104   if (draw->pipeline.aaline)
105      draw->pipeline.aaline->destroy( draw->pipeline.aaline );
106   if (draw->pipeline.aapoint)
107      draw->pipeline.aapoint->destroy( draw->pipeline.aapoint );
108   if (draw->pipeline.pstipple)
109      draw->pipeline.pstipple->destroy( draw->pipeline.pstipple );
110   if (draw->pipeline.rasterize)
111      draw->pipeline.rasterize->destroy( draw->pipeline.rasterize );
112}
113
114
115
116/**
117 * Build primitive to render a point with vertex at v0.
118 */
119static void do_point( struct draw_context *draw,
120		      const char *v0 )
121{
122   struct prim_header prim;
123
124   prim.flags = 0;
125   prim.pad = 0;
126   prim.v[0] = (struct vertex_header *)v0;
127
128   draw->pipeline.first->point( draw->pipeline.first, &prim );
129}
130
131
132/**
133 * Build primitive to render a line with vertices at v0, v1.
134 * \param flags  bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
135 */
136static void do_line( struct draw_context *draw,
137                     ushort flags,
138		     const char *v0,
139		     const char *v1 )
140{
141   struct prim_header prim;
142
143   prim.flags = flags;
144   prim.pad = 0;
145   prim.v[0] = (struct vertex_header *)v0;
146   prim.v[1] = (struct vertex_header *)v1;
147
148   draw->pipeline.first->line( draw->pipeline.first, &prim );
149}
150
151
152/**
153 * Build primitive to render a triangle with vertices at v0, v1, v2.
154 * \param flags  bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
155 */
156static void do_triangle( struct draw_context *draw,
157                         ushort flags,
158			 char *v0,
159			 char *v1,
160			 char *v2 )
161{
162   struct prim_header prim;
163
164   prim.v[0] = (struct vertex_header *)v0;
165   prim.v[1] = (struct vertex_header *)v1;
166   prim.v[2] = (struct vertex_header *)v2;
167   prim.flags = flags;
168   prim.pad = 0;
169
170   draw->pipeline.first->tri( draw->pipeline.first, &prim );
171}
172
173
174/*
175 * Set up macros for draw_pt_decompose.h template code.
176 * This code uses vertex indexes / elements.
177 */
178
179#define TRIANGLE(flags,i0,i1,i2)                                  \
180   do {                                                           \
181      do_triangle( draw,                                          \
182                   flags,                                         \
183                   verts + stride * (i0),                         \
184                   verts + stride * (i1),                         \
185                   verts + stride * (i2) );                       \
186   } while (0)
187
188#define LINE(flags,i0,i1)                                         \
189   do {                                                           \
190      do_line( draw,                                              \
191               flags,                                             \
192               verts + stride * (i0),                             \
193               verts + stride * (i1) );                           \
194   } while (0)
195
196#define POINT(i0)                               \
197   do {                                         \
198      do_point( draw, verts + stride * (i0) );  \
199   } while (0)
200
201#define GET_ELT(idx) (MIN2(elts[idx], max_index))
202
203#define FUNC pipe_run_elts
204#define FUNC_VARS                               \
205    struct draw_context *draw,                  \
206    unsigned prim,                              \
207    unsigned prim_flags,                        \
208    struct vertex_header *vertices,             \
209    unsigned stride,                            \
210    const ushort *elts,                         \
211    unsigned count,                             \
212    unsigned max_index
213
214#include "draw_pt_decompose.h"
215
216
217
218/**
219 * Code to run the pipeline on a fairly arbitrary collection of vertices.
220 * For drawing indexed primitives.
221 *
222 * Vertex headers must be pre-initialized with the
223 * UNDEFINED_VERTEX_ID, this code will cause that id to become
224 * overwritten, so it may have to be reset if there is the intention
225 * to reuse the vertices.
226 *
227 * This code provides a callback to reset the vertex id's which the
228 * draw_vbuf.c code uses when it has to perform a flush.
229 */
230void draw_pipeline_run( struct draw_context *draw,
231                        const struct draw_vertex_info *vert_info,
232                        const struct draw_prim_info *prim_info)
233{
234   unsigned i, start;
235
236   draw->pipeline.verts = (char *)vert_info->verts;
237   draw->pipeline.vertex_stride = vert_info->stride;
238   draw->pipeline.vertex_count = vert_info->count;
239
240   for (start = i = 0;
241        i < prim_info->primitive_count;
242        start += prim_info->primitive_lengths[i], i++)
243   {
244      const unsigned count = prim_info->primitive_lengths[i];
245
246#if DEBUG
247      /* Warn if one of the element indexes go outside the vertex buffer */
248      {
249         unsigned max_index = 0x0, i;
250         /* find the largest element index */
251         for (i = 0; i < count; i++) {
252            unsigned int index = prim_info->elts[start + i];
253            if (index > max_index)
254               max_index = index;
255         }
256         if (max_index >= vert_info->count) {
257            debug_printf("%s: max_index (%u) outside vertex buffer (%u)\n",
258                         __FUNCTION__,
259                         max_index,
260                         vert_info->count);
261         }
262      }
263#endif
264
265      pipe_run_elts(draw,
266                    prim_info->prim,
267                    prim_info->flags,
268                    vert_info->verts,
269                    vert_info->stride,
270                    prim_info->elts + start,
271                    count,
272                    vert_info->count - 1);
273   }
274
275   draw->pipeline.verts = NULL;
276   draw->pipeline.vertex_count = 0;
277}
278
279
280/*
281 * Set up macros for draw_pt_decompose.h template code.
282 * This code is for non-indexed (aka linear) rendering (no elts).
283 */
284
285#define TRIANGLE(flags,i0,i1,i2)       \
286   do_triangle( draw, flags,           \
287                verts + stride * (i0), \
288                verts + stride * (i1), \
289                verts + stride * (i2) )
290
291#define LINE(flags,i0,i1)              \
292   do_line( draw, flags,               \
293            verts + stride * (i0),     \
294            verts + stride * (i1) )
295
296#define POINT(i0)                      \
297   do_point( draw, verts + stride * (i0) )
298
299
300#define GET_ELT(idx) (idx)
301
302#define FUNC pipe_run_linear
303#define FUNC_VARS                      \
304    struct draw_context *draw,         \
305    unsigned prim,                     \
306    unsigned prim_flags,               \
307    struct vertex_header *vertices,    \
308    unsigned stride,                   \
309    unsigned count
310
311#include "draw_pt_decompose.h"
312
313
314/*
315 * For drawing non-indexed primitives.
316 */
317void draw_pipeline_run_linear( struct draw_context *draw,
318                               const struct draw_vertex_info *vert_info,
319                               const struct draw_prim_info *prim_info)
320{
321   unsigned i, start;
322
323   for (start = i = 0;
324        i < prim_info->primitive_count;
325        start += prim_info->primitive_lengths[i], i++)
326   {
327      unsigned count = prim_info->primitive_lengths[i];
328      char *verts = ((char*)vert_info->verts) +
329                    (start * vert_info->stride);
330
331      draw->pipeline.verts = verts;
332      draw->pipeline.vertex_stride = vert_info->stride;
333      draw->pipeline.vertex_count = count;
334
335      assert(count <= vert_info->count);
336
337      pipe_run_linear(draw,
338                      prim_info->prim,
339                      prim_info->flags,
340                      (struct vertex_header*)verts,
341                      vert_info->stride,
342                      count);
343   }
344
345   draw->pipeline.verts = NULL;
346   draw->pipeline.vertex_count = 0;
347}
348
349
350void draw_pipeline_flush( struct draw_context *draw,
351                          unsigned flags )
352{
353   draw->pipeline.first->flush( draw->pipeline.first, flags );
354   if (flags & DRAW_FLUSH_STATE_CHANGE)
355      draw->pipeline.first = draw->pipeline.validate;
356}
357