1 /**********************************************************
2 * Copyright 2008-2009 VMware, Inc. All rights reserved.
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:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
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
24 **********************************************************/
26 #include "util/u_inlines.h"
27 #include "util/u_prim.h"
28 #include "util/u_upload_mgr.h"
29 #include "indices/u_indices.h"
32 #include "svga_draw.h"
33 #include "svga_draw_private.h"
34 #include "svga_resource_buffer.h"
35 #include "svga_winsys.h"
36 #include "svga_context.h"
37 #include "svga_hw_reg.h"
40 static enum pipe_error
41 translate_indices(struct svga_hwtnl
*hwtnl
, struct pipe_resource
*src
,
42 unsigned offset
, enum pipe_prim_type prim
, unsigned nr
,
44 u_translate_func translate
, struct pipe_resource
**out_buf
)
46 struct pipe_context
*pipe
= &hwtnl
->svga
->pipe
;
47 struct pipe_transfer
*src_transfer
= NULL
;
48 struct pipe_transfer
*dst_transfer
= NULL
;
49 unsigned size
= index_size
* nr
;
50 const void *src_map
= NULL
;
51 struct pipe_resource
*dst
= NULL
;
54 /* Need to trim vertex count to make sure we don't write too much data
55 * to the dst buffer in the translate() call.
57 u_trim_pipe_prim(prim
, &nr
);
59 size
= index_size
* nr
;
61 dst
= pipe_buffer_create(pipe
->screen
,
62 PIPE_BIND_INDEX_BUFFER
, PIPE_USAGE_DEFAULT
, size
);
66 src_map
= pipe_buffer_map(pipe
, src
, PIPE_TRANSFER_READ
, &src_transfer
);
70 dst_map
= pipe_buffer_map(pipe
, dst
, PIPE_TRANSFER_WRITE
, &dst_transfer
);
74 translate((const char *) src_map
+ offset
, 0, 0, nr
, 0, dst_map
);
76 pipe_buffer_unmap(pipe
, src_transfer
);
77 pipe_buffer_unmap(pipe
, dst_transfer
);
84 pipe_buffer_unmap(pipe
, src_transfer
);
87 pipe_buffer_unmap(pipe
, dst_transfer
);
90 pipe
->screen
->resource_destroy(pipe
->screen
, dst
);
92 return PIPE_ERROR_OUT_OF_MEMORY
;
97 svga_hwtnl_simple_draw_range_elements(struct svga_hwtnl
*hwtnl
,
98 struct pipe_resource
*index_buffer
,
99 unsigned index_size
, int index_bias
,
100 unsigned min_index
, unsigned max_index
,
101 enum pipe_prim_type prim
, unsigned start
,
103 unsigned start_instance
,
104 unsigned instance_count
)
106 SVGA3dPrimitiveRange range
;
109 unsigned index_offset
= start
* index_size
;
111 hw_prim
= svga_translate_prim(prim
, count
, &hw_count
);
113 return PIPE_OK
; /* nothing to draw */
115 range
.primType
= hw_prim
;
116 range
.primitiveCount
= hw_count
;
117 range
.indexArray
.offset
= index_offset
;
118 range
.indexArray
.stride
= index_size
;
119 range
.indexWidth
= index_size
;
120 range
.indexBias
= index_bias
;
122 return svga_hwtnl_prim(hwtnl
, &range
, count
,
123 min_index
, max_index
, index_buffer
,
124 start_instance
, instance_count
);
129 svga_hwtnl_draw_range_elements(struct svga_hwtnl
*hwtnl
,
130 struct pipe_resource
*index_buffer
,
131 unsigned index_size
, int index_bias
,
132 unsigned min_index
, unsigned max_index
,
133 enum pipe_prim_type prim
, unsigned start
, unsigned count
,
134 unsigned start_instance
, unsigned instance_count
)
136 enum pipe_prim_type gen_prim
;
137 unsigned gen_size
, gen_nr
;
138 enum indices_mode gen_type
;
139 u_translate_func gen_func
;
140 enum pipe_error ret
= PIPE_OK
;
142 if (svga_need_unfilled_fallback(hwtnl
, prim
)) {
143 gen_type
= u_unfilled_translator(prim
,
148 &gen_size
, &gen_nr
, &gen_func
);
151 gen_type
= u_index_translator(svga_hw_prims
,
158 &gen_prim
, &gen_size
, &gen_nr
, &gen_func
);
161 if (gen_type
== U_TRANSLATE_MEMCPY
) {
162 /* No need for translation, just pass through to hardware:
164 return svga_hwtnl_simple_draw_range_elements(hwtnl
, index_buffer
,
169 gen_prim
, start
, count
,
174 struct pipe_resource
*gen_buf
= NULL
;
176 /* Need to allocate a new index buffer and run the translate
177 * func to populate it. Could potentially cache this translated
178 * index buffer with the original to avoid future
179 * re-translations. Not much point if we're just accelerating
180 * GL though, as index buffers are typically used only once
183 ret
= translate_indices(hwtnl
,
186 gen_prim
, gen_nr
, gen_size
, gen_func
, &gen_buf
);
190 ret
= svga_hwtnl_simple_draw_range_elements(hwtnl
,
204 pipe_resource_reference(&gen_buf
, NULL
);