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 "util/u_inlines.h"
27#include "util/u_upload_mgr.h"
28#include "indices/u_indices.h"
29
30#include "svga_cmd.h"
31#include "svga_draw.h"
32#include "svga_draw_private.h"
33#include "svga_resource_buffer.h"
34#include "svga_winsys.h"
35#include "svga_context.h"
36
37#include "svga_hw_reg.h"
38
39
40static enum pipe_error
41translate_indices( struct svga_hwtnl *hwtnl,
42                   struct pipe_resource *src,
43                   unsigned offset,
44                   unsigned nr,
45                   unsigned index_size,
46                   u_translate_func translate,
47                   struct pipe_resource **out_buf )
48{
49   struct pipe_context *pipe = &hwtnl->svga->pipe;
50   struct pipe_transfer *src_transfer = NULL;
51   struct pipe_transfer *dst_transfer = NULL;
52   unsigned size = index_size * nr;
53   const void *src_map = NULL;
54   struct pipe_resource *dst = NULL;
55   void *dst_map = NULL;
56
57   dst = pipe_buffer_create( pipe->screen,
58			     PIPE_BIND_INDEX_BUFFER,
59			     PIPE_USAGE_STATIC,
60			     size );
61   if (dst == NULL)
62      goto fail;
63
64   src_map = pipe_buffer_map( pipe, src, PIPE_TRANSFER_READ, &src_transfer );
65   if (src_map == NULL)
66      goto fail;
67
68   dst_map = pipe_buffer_map( pipe, dst, PIPE_TRANSFER_WRITE, &dst_transfer );
69   if (dst_map == NULL)
70      goto fail;
71
72   translate( (const char *)src_map + offset,
73              nr,
74              dst_map );
75
76   pipe_buffer_unmap( pipe, src_transfer );
77   pipe_buffer_unmap( pipe, dst_transfer );
78
79   *out_buf = dst;
80   return PIPE_OK;
81
82fail:
83   if (src_map)
84      pipe_buffer_unmap( pipe, src_transfer );
85
86   if (dst_map)
87      pipe_buffer_unmap( pipe, dst_transfer );
88
89   if (dst)
90      pipe->screen->resource_destroy( pipe->screen, dst );
91
92   return PIPE_ERROR_OUT_OF_MEMORY;
93}
94
95
96
97
98
99enum pipe_error
100svga_hwtnl_simple_draw_range_elements( struct svga_hwtnl *hwtnl,
101                                       struct pipe_resource *index_buffer,
102                                       unsigned index_size,
103                                       int index_bias,
104                                       unsigned min_index,
105                                       unsigned max_index,
106                                       unsigned prim,
107                                       unsigned start,
108                                       unsigned count )
109{
110   struct pipe_resource *upload_buffer = NULL;
111   SVGA3dPrimitiveRange range;
112   unsigned hw_prim;
113   unsigned hw_count;
114   unsigned index_offset = start * index_size;
115   enum pipe_error ret = PIPE_OK;
116
117   hw_prim = svga_translate_prim(prim, count, &hw_count);
118   if (hw_count == 0)
119      goto done;
120
121   if (index_buffer &&
122       svga_buffer_is_user_buffer(index_buffer))
123   {
124      assert( index_buffer->width0 >= index_offset + count * index_size );
125
126      ret = u_upload_buffer( hwtnl->upload_ib,
127                             0,
128                             index_offset,
129                             count * index_size,
130                             index_buffer,
131                             &index_offset,
132                             &upload_buffer);
133      if (ret != PIPE_OK)
134         goto done;
135
136      /* Don't need to worry about refcounting index_buffer as this is
137       * just a stack variable without a counted reference of its own.
138       * The caller holds the reference.
139       */
140      index_buffer = upload_buffer;
141   }
142
143   range.primType = hw_prim;
144   range.primitiveCount = hw_count;
145   range.indexArray.offset = index_offset;
146   range.indexArray.stride = index_size;
147   range.indexWidth = index_size;
148   range.indexBias = index_bias;
149
150   ret = svga_hwtnl_prim( hwtnl, &range, min_index, max_index, index_buffer );
151   if (ret != PIPE_OK)
152      goto done;
153
154done:
155   if (upload_buffer)
156      pipe_resource_reference( &upload_buffer, NULL );
157
158   return ret;
159}
160
161
162
163
164enum pipe_error
165svga_hwtnl_draw_range_elements( struct svga_hwtnl *hwtnl,
166                                struct pipe_resource *index_buffer,
167                                unsigned index_size,
168                                int index_bias,
169                                unsigned min_index,
170                                unsigned max_index,
171                                unsigned prim, unsigned start, unsigned count)
172{
173   unsigned gen_prim, gen_size, gen_nr, gen_type;
174   u_translate_func gen_func;
175   enum pipe_error ret = PIPE_OK;
176
177   if (hwtnl->api_fillmode != PIPE_POLYGON_MODE_FILL &&
178       prim >= PIPE_PRIM_TRIANGLES)
179   {
180      gen_type = u_unfilled_translator( prim,
181                                        index_size,
182                                        count,
183                                        hwtnl->api_fillmode,
184                                        &gen_prim,
185                                        &gen_size,
186                                        &gen_nr,
187                                        &gen_func );
188   }
189   else
190   {
191      gen_type = u_index_translator( svga_hw_prims,
192                                     prim,
193                                     index_size,
194                                     count,
195                                     hwtnl->api_pv,
196                                     hwtnl->hw_pv,
197                                     &gen_prim,
198                                     &gen_size,
199                                     &gen_nr,
200                                     &gen_func );
201   }
202
203
204   if (gen_type == U_TRANSLATE_MEMCPY) {
205      /* No need for translation, just pass through to hardware:
206       */
207      return svga_hwtnl_simple_draw_range_elements( hwtnl, index_buffer,
208                                                    index_size,
209                                                    index_bias,
210                                                    min_index,
211                                                    max_index,
212                                                    gen_prim, start, count );
213   }
214   else {
215      struct pipe_resource *gen_buf = NULL;
216
217      /* Need to allocate a new index buffer and run the translate
218       * func to populate it.  Could potentially cache this translated
219       * index buffer with the original to avoid future
220       * re-translations.  Not much point if we're just accelerating
221       * GL though, as index buffers are typically used only once
222       * there.
223       */
224      ret = translate_indices( hwtnl,
225                               index_buffer,
226                               start * index_size,
227                               gen_nr,
228                               gen_size,
229                               gen_func,
230                               &gen_buf );
231      if (ret != PIPE_OK)
232         goto done;
233
234      ret = svga_hwtnl_simple_draw_range_elements( hwtnl,
235                                                   gen_buf,
236                                                   gen_size,
237                                                   index_bias,
238                                                   min_index,
239                                                   max_index,
240                                                   gen_prim,
241                                                   0,
242                                                   gen_nr );
243      if (ret != PIPE_OK)
244         goto done;
245
246   done:
247      if (gen_buf)
248         pipe_resource_reference( &gen_buf, NULL );
249
250      return ret;
251   }
252}
253
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256
257
258