draw_pipe.c revision eb65ccbc21670d16813b53e0f8d94cb4e037d39c 
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
39boolean 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 = 1000000.0f; /* infinity */
68   draw->pipeline.wide_line_threshold = 1.0f;
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
77void 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 */
114static 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 */
131static 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 */
151static 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 */
224void 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 */
310void 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
343void draw_pipeline_flush( struct draw_context *draw,
344                          unsigned flags )
345{
346   draw->pipeline.first->flush( draw->pipeline.first, flags );
347   if (!(flags & DRAW_FLUSH_BACKEND))
348      draw->pipeline.first = draw->pipeline.validate;
349}
350