1/**********************************************************
2 * Copyright 2008-2009 VMware, Inc.  All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26#include "draw/draw_vbuf.h"
27#include "draw/draw_context.h"
28#include "draw/draw_vertex.h"
29
30#include "util/u_debug.h"
31#include "util/u_inlines.h"
32#include "util/u_math.h"
33#include "util/u_memory.h"
34
35#include "svga_context.h"
36#include "svga_state.h"
37#include "svga_swtnl.h"
38
39#include "svga_types.h"
40#include "svga_reg.h"
41#include "svga3d_reg.h"
42#include "svga_draw.h"
43#include "svga_swtnl_private.h"
44
45
46static const struct vertex_info *
47svga_vbuf_render_get_vertex_info( struct vbuf_render *render )
48{
49   struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
50   struct svga_context *svga = svga_render->svga;
51
52   svga_swtnl_update_vdecl(svga);
53
54   return &svga_render->vertex_info;
55}
56
57
58static boolean
59svga_vbuf_render_allocate_vertices( struct vbuf_render *render,
60                                    ushort vertex_size,
61                                    ushort nr_vertices )
62{
63   struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
64   struct svga_context *svga = svga_render->svga;
65   struct pipe_screen *screen = svga->pipe.screen;
66   size_t size = (size_t)nr_vertices * (size_t)vertex_size;
67   boolean new_vbuf = FALSE;
68   boolean new_ibuf = FALSE;
69
70   if (svga_render->vertex_size != vertex_size)
71      svga->swtnl.new_vdecl = TRUE;
72   svga_render->vertex_size = (size_t)vertex_size;
73
74   if (svga->swtnl.new_vbuf)
75      new_ibuf = new_vbuf = TRUE;
76   svga->swtnl.new_vbuf = FALSE;
77
78   if (svga_render->vbuf_size < svga_render->vbuf_offset + svga_render->vbuf_used + size)
79      new_vbuf = TRUE;
80
81   if (new_vbuf)
82      pipe_resource_reference(&svga_render->vbuf, NULL);
83   if (new_ibuf)
84      pipe_resource_reference(&svga_render->ibuf, NULL);
85
86   if (!svga_render->vbuf) {
87      svga_render->vbuf_size = MAX2(size, svga_render->vbuf_alloc_size);
88      svga_render->vbuf = pipe_buffer_create(screen,
89                                             PIPE_BIND_VERTEX_BUFFER,
90                                             PIPE_USAGE_STREAM,
91                                             svga_render->vbuf_size);
92      if(!svga_render->vbuf) {
93         svga_context_flush(svga, NULL);
94         assert(!svga_render->vbuf);
95         svga_render->vbuf = pipe_buffer_create(screen,
96                                                PIPE_BIND_VERTEX_BUFFER,
97                                                PIPE_USAGE_STREAM,
98                                                svga_render->vbuf_size);
99         /* The buffer allocation may fail if we run out of memory.
100          * The draw module's vbuf code should handle that without crashing.
101          */
102      }
103
104      svga->swtnl.new_vdecl = TRUE;
105      svga_render->vbuf_offset = 0;
106   } else {
107      svga_render->vbuf_offset += svga_render->vbuf_used;
108   }
109
110   svga_render->vbuf_used = 0;
111
112   if (svga->swtnl.new_vdecl)
113      svga_render->vdecl_offset = svga_render->vbuf_offset;
114
115   return TRUE;
116}
117
118static void *
119svga_vbuf_render_map_vertices( struct vbuf_render *render )
120{
121   struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
122   struct svga_context *svga = svga_render->svga;
123
124   if (svga_render->vbuf) {
125      char *ptr = (char*)pipe_buffer_map(&svga->pipe,
126                                         svga_render->vbuf,
127                                         PIPE_TRANSFER_WRITE |
128                                         PIPE_TRANSFER_FLUSH_EXPLICIT |
129                                         PIPE_TRANSFER_DISCARD_RANGE |
130                                         PIPE_TRANSFER_UNSYNCHRONIZED,
131                                         &svga_render->vbuf_transfer);
132      if (ptr)
133         return ptr + svga_render->vbuf_offset;
134      else
135         return NULL;
136   }
137   else {
138      /* we probably ran out of memory when allocating the vertex buffer */
139      return NULL;
140   }
141}
142
143static void
144svga_vbuf_render_unmap_vertices( struct vbuf_render *render,
145                                 ushort min_index,
146                                 ushort max_index )
147{
148   struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
149   struct svga_context *svga = svga_render->svga;
150   unsigned offset, length;
151   size_t used = svga_render->vertex_size * ((size_t)max_index + 1);
152
153   offset = svga_render->vbuf_offset + svga_render->vertex_size * min_index;
154   length = svga_render->vertex_size * (max_index + 1 - min_index);
155   pipe_buffer_flush_mapped_range(&svga->pipe,
156				  svga_render->vbuf_transfer,
157				  offset, length);
158   pipe_buffer_unmap(&svga->pipe, svga_render->vbuf_transfer);
159   svga_render->min_index = min_index;
160   svga_render->max_index = max_index;
161   svga_render->vbuf_used = MAX2(svga_render->vbuf_used, used);
162}
163
164static void
165svga_vbuf_render_set_primitive( struct vbuf_render *render,
166                                unsigned prim )
167{
168   struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
169   svga_render->prim = prim;
170}
171
172static void
173svga_vbuf_submit_state( struct svga_vbuf_render *svga_render )
174{
175   struct svga_context *svga = svga_render->svga;
176   SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
177   enum pipe_error ret;
178   int i;
179
180   /* if the vdecl or vbuf hasn't changed do nothing */
181   if (!svga->swtnl.new_vdecl)
182      return;
183
184   memcpy(vdecl, svga_render->vdecl, sizeof(vdecl));
185
186   /* flush the hw state */
187   ret = svga_hwtnl_flush(svga->hwtnl);
188   if (ret != PIPE_OK) {
189      svga_context_flush(svga, NULL);
190      ret = svga_hwtnl_flush(svga->hwtnl);
191      /* if we hit this path we might become synced with hw */
192      svga->swtnl.new_vbuf = TRUE;
193      assert(ret == 0);
194   }
195
196   svga_hwtnl_reset_vdecl(svga->hwtnl, svga_render->vdecl_count);
197
198   for (i = 0; i < svga_render->vdecl_count; i++) {
199      vdecl[i].array.offset += svga_render->vdecl_offset;
200
201      svga_hwtnl_vdecl( svga->hwtnl,
202                        i,
203                        &vdecl[i],
204                        svga_render->vbuf );
205   }
206
207   /* We have already taken care of flatshading, so let the hwtnl
208    * module use whatever is most convenient:
209    */
210   if (svga->state.sw.need_pipeline) {
211      svga_hwtnl_set_flatshade(svga->hwtnl, FALSE, FALSE);
212      svga_hwtnl_set_unfilled(svga->hwtnl, PIPE_POLYGON_MODE_FILL);
213   }
214   else {
215      svga_hwtnl_set_flatshade( svga->hwtnl,
216                                svga->curr.rast->templ.flatshade,
217                                svga->curr.rast->templ.flatshade_first );
218
219      svga_hwtnl_set_unfilled( svga->hwtnl,
220                               svga->curr.rast->hw_unfilled );
221   }
222
223   svga->swtnl.new_vdecl = FALSE;
224}
225
226static void
227svga_vbuf_render_draw_arrays( struct vbuf_render *render,
228                              unsigned start,
229                              uint nr )
230{
231   struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
232   struct svga_context *svga = svga_render->svga;
233   unsigned bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
234   enum pipe_error ret = PIPE_OK;
235
236   /* off to hardware */
237   svga_vbuf_submit_state(svga_render);
238
239   /* Need to call update_state() again as the draw module may have
240    * altered some of our state behind our backs.  Testcase:
241    * redbook/polys.c
242    */
243   svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
244
245   ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr);
246   if (ret != PIPE_OK) {
247      svga_context_flush(svga, NULL);
248      ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr);
249      svga->swtnl.new_vbuf = TRUE;
250      assert(ret == PIPE_OK);
251   }
252}
253
254
255static void
256svga_vbuf_render_draw_elements( struct vbuf_render *render,
257                                const ushort *indices,
258                                uint nr_indices)
259{
260   struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
261   struct svga_context *svga = svga_render->svga;
262   struct pipe_screen *screen = svga->pipe.screen;
263   int bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
264   boolean ret;
265   size_t size = 2 * nr_indices;
266
267   assert(( svga_render->vbuf_offset - svga_render->vdecl_offset) % svga_render->vertex_size == 0);
268
269   if (svga_render->ibuf_size < svga_render->ibuf_offset + size)
270      pipe_resource_reference(&svga_render->ibuf, NULL);
271
272   if (!svga_render->ibuf) {
273      svga_render->ibuf_size = MAX2(size, svga_render->ibuf_alloc_size);
274      svga_render->ibuf = pipe_buffer_create(screen,
275                                             PIPE_BIND_INDEX_BUFFER,
276                                             PIPE_USAGE_STREAM,
277                                             svga_render->ibuf_size);
278      svga_render->ibuf_offset = 0;
279   }
280
281   pipe_buffer_write_nooverlap(&svga->pipe, svga_render->ibuf,
282			       svga_render->ibuf_offset, 2 * nr_indices, indices);
283
284   /* off to hardware */
285   svga_vbuf_submit_state(svga_render);
286
287   /* Need to call update_state() again as the draw module may have
288    * altered some of our state behind our backs.  Testcase:
289    * redbook/polys.c
290    */
291   svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
292
293   ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
294                                        svga_render->ibuf,
295                                        2,
296                                        bias,
297                                        svga_render->min_index,
298                                        svga_render->max_index,
299                                        svga_render->prim,
300                                        svga_render->ibuf_offset / 2, nr_indices);
301   if(ret != PIPE_OK) {
302      svga_context_flush(svga, NULL);
303      ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
304                                           svga_render->ibuf,
305                                           2,
306                                           bias,
307                                           svga_render->min_index,
308                                           svga_render->max_index,
309                                           svga_render->prim,
310                                           svga_render->ibuf_offset / 2, nr_indices);
311      svga->swtnl.new_vbuf = TRUE;
312      assert(ret == PIPE_OK);
313   }
314
315   svga_render->ibuf_offset += size;
316}
317
318
319static void
320svga_vbuf_render_release_vertices( struct vbuf_render *render )
321{
322
323}
324
325
326static void
327svga_vbuf_render_destroy( struct vbuf_render *render )
328{
329   struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
330
331   pipe_resource_reference(&svga_render->vbuf, NULL);
332   pipe_resource_reference(&svga_render->ibuf, NULL);
333   FREE(svga_render);
334}
335
336
337/**
338 * Create a new primitive render.
339 */
340struct vbuf_render *
341svga_vbuf_render_create( struct svga_context *svga )
342{
343   struct svga_vbuf_render *svga_render = CALLOC_STRUCT(svga_vbuf_render);
344
345   svga_render->svga = svga;
346   svga_render->ibuf_size = 0;
347   svga_render->vbuf_size = 0;
348   svga_render->ibuf_alloc_size = 4*1024;
349   svga_render->vbuf_alloc_size = 64*1024;
350   svga_render->base.max_vertex_buffer_bytes = 64*1024/10;
351   svga_render->base.max_indices = 65536;
352   svga_render->base.get_vertex_info = svga_vbuf_render_get_vertex_info;
353   svga_render->base.allocate_vertices = svga_vbuf_render_allocate_vertices;
354   svga_render->base.map_vertices = svga_vbuf_render_map_vertices;
355   svga_render->base.unmap_vertices = svga_vbuf_render_unmap_vertices;
356   svga_render->base.set_primitive = svga_vbuf_render_set_primitive;
357   svga_render->base.draw_elements = svga_vbuf_render_draw_elements;
358   svga_render->base.draw_arrays = svga_vbuf_render_draw_arrays;
359   svga_render->base.release_vertices = svga_vbuf_render_release_vertices;
360   svga_render->base.destroy = svga_vbuf_render_destroy;
361
362   return &svga_render->base;
363}
364