Merge branch 'master' into opengl-es-v2
[mesa.git] / src / gallium / drivers / svga / svga_draw_elements.c
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 "pipe/p_inlines.h"
27 #include "util/u_prim.h"
28 #include "util/u_upload_mgr.h"
29 #include "indices/u_indices.h"
30
31 #include "svga_cmd.h"
32 #include "svga_draw.h"
33 #include "svga_draw_private.h"
34 #include "svga_screen_buffer.h"
35 #include "svga_winsys.h"
36 #include "svga_context.h"
37
38 #include "svga_hw_reg.h"
39
40
41 static enum pipe_error
42 translate_indices( struct svga_hwtnl *hwtnl,
43 struct pipe_buffer *src,
44 unsigned offset,
45 unsigned nr,
46 unsigned index_size,
47 u_translate_func translate,
48 struct pipe_buffer **out_buf )
49 {
50 struct pipe_screen *screen = hwtnl->svga->pipe.screen;
51 unsigned size = index_size * nr;
52 const void *src_map = NULL;
53 struct pipe_buffer *dst = NULL;
54 void *dst_map = NULL;
55
56 dst = screen->buffer_create( screen, 32,
57 PIPE_BUFFER_USAGE_INDEX |
58 PIPE_BUFFER_USAGE_CPU_WRITE |
59 PIPE_BUFFER_USAGE_GPU_READ,
60 size );
61 if (dst == NULL)
62 goto fail;
63
64 src_map = pipe_buffer_map( screen, src, PIPE_BUFFER_USAGE_CPU_READ );
65 if (src_map == NULL)
66 goto fail;
67
68 dst_map = pipe_buffer_map( screen, dst, PIPE_BUFFER_USAGE_CPU_WRITE );
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( screen, src );
77 pipe_buffer_unmap( screen, dst );
78
79 *out_buf = dst;
80 return PIPE_OK;
81
82 fail:
83 if (src_map)
84 screen->buffer_unmap( screen, src );
85
86 if (dst_map)
87 screen->buffer_unmap( screen, dst );
88
89 if (dst)
90 screen->buffer_destroy( dst );
91
92 return PIPE_ERROR_OUT_OF_MEMORY;
93 }
94
95
96
97
98
99 enum pipe_error
100 svga_hwtnl_simple_draw_range_elements( struct svga_hwtnl *hwtnl,
101 struct pipe_buffer *index_buffer,
102 unsigned index_size,
103 unsigned min_index,
104 unsigned max_index,
105 unsigned prim,
106 unsigned start,
107 unsigned count,
108 unsigned bias )
109 {
110 struct pipe_buffer *upload_buffer = NULL;
111 SVGA3dPrimitiveRange range;
112 unsigned hw_prim;
113 unsigned hw_count;
114 unsigned index_offset = start * index_size;
115 int 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->size >= index_offset + count * index_size );
125
126 ret = u_upload_buffer( hwtnl->upload_ib,
127 index_offset,
128 count * index_size,
129 index_buffer,
130 &index_offset,
131 &upload_buffer );
132 if (ret)
133 goto done;
134
135 /* Don't need to worry about refcounting index_buffer as this is
136 * just a stack variable without a counted reference of its own.
137 * The caller holds the reference.
138 */
139 index_buffer = upload_buffer;
140 }
141
142 range.primType = hw_prim;
143 range.primitiveCount = hw_count;
144 range.indexArray.offset = index_offset;
145 range.indexArray.stride = index_size;
146 range.indexWidth = index_size;
147 range.indexBias = bias;
148
149 ret = svga_hwtnl_prim( hwtnl, &range, min_index, max_index, index_buffer );
150 if (ret)
151 goto done;
152
153 done:
154 if (upload_buffer)
155 pipe_buffer_reference( &upload_buffer, NULL );
156
157 return ret;
158 }
159
160
161
162
163 enum pipe_error
164 svga_hwtnl_draw_range_elements( struct svga_hwtnl *hwtnl,
165 struct pipe_buffer *index_buffer,
166 unsigned index_size,
167 unsigned min_index,
168 unsigned max_index,
169 unsigned prim, unsigned start, unsigned count,
170 unsigned bias)
171 {
172 unsigned gen_prim, gen_size, gen_nr, gen_type;
173 u_translate_func gen_func;
174 enum pipe_error ret = PIPE_OK;
175
176 if (hwtnl->api_fillmode != PIPE_POLYGON_MODE_FILL &&
177 prim >= PIPE_PRIM_TRIANGLES)
178 {
179 gen_type = u_unfilled_translator( prim,
180 index_size,
181 count,
182 hwtnl->api_fillmode,
183 &gen_prim,
184 &gen_size,
185 &gen_nr,
186 &gen_func );
187 }
188 else
189 {
190 gen_type = u_index_translator( svga_hw_prims,
191 prim,
192 index_size,
193 count,
194 hwtnl->api_pv,
195 hwtnl->hw_pv,
196 &gen_prim,
197 &gen_size,
198 &gen_nr,
199 &gen_func );
200 }
201
202
203 if (gen_type == U_TRANSLATE_MEMCPY) {
204 /* No need for translation, just pass through to hardware:
205 */
206 return svga_hwtnl_simple_draw_range_elements( hwtnl, index_buffer,
207 index_size,
208 min_index,
209 max_index,
210 gen_prim, start, count, bias );
211 }
212 else {
213 struct pipe_buffer *gen_buf = NULL;
214
215 /* Need to allocate a new index buffer and run the translate
216 * func to populate it. Could potentially cache this translated
217 * index buffer with the original to avoid future
218 * re-translations. Not much point if we're just accelerating
219 * GL though, as index buffers are typically used only once
220 * there.
221 */
222 ret = translate_indices( hwtnl,
223 index_buffer,
224 start * index_size,
225 gen_nr,
226 gen_size,
227 gen_func,
228 &gen_buf );
229 if (ret)
230 goto done;
231
232 ret = svga_hwtnl_simple_draw_range_elements( hwtnl,
233 gen_buf,
234 gen_size,
235 min_index,
236 max_index,
237 gen_prim,
238 0,
239 gen_nr,
240 bias );
241 if (ret)
242 goto done;
243
244 done:
245 if (gen_buf)
246 pipe_buffer_reference( &gen_buf, NULL );
247
248 return ret;
249 }
250 }
251
252
253
254
255