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 "pipe/p_defines.h"
28 #include "util/u_math.h"
29 #include "util/u_upload_mgr.h"
31 #include "svga_context.h"
32 #include "svga_state.h"
33 #include "svga_draw.h"
34 #include "svga_tgsi.h"
35 #include "svga_screen.h"
36 #include "svga_resource_buffer.h"
37 #include "svga_hw_reg.h"
41 static enum pipe_error
42 emit_hw_vs_vdecl(struct svga_context
*svga
, unsigned dirty
)
44 const struct pipe_vertex_element
*ve
= svga
->curr
.velems
->velem
;
46 unsigned neg_bias
= 0;
48 assert(svga
->curr
.velems
->count
>=
49 svga
->curr
.vs
->base
.info
.file_count
[TGSI_FILE_INPUT
]);
51 /* specify number of vertex element declarations to come */
52 svga_hwtnl_reset_vdecl( svga
->hwtnl
,
53 svga
->curr
.velems
->count
);
56 * We can't set the VDECL offset to something negative, so we
57 * must calculate a common negative additional index bias, and modify
58 * the VDECL offsets accordingly so they *all* end up positive.
60 * Note that the exact value of the negative index bias is not that
61 * important, since we compensate for it when we calculate the vertex
62 * buffer offset below. The important thing is that all vertex buffer
63 * offsets remain positive.
65 * Note that we use a negative bias variable in order to make the
66 * rounding maths more easy to follow, and to avoid int / unsigned
70 for (i
= 0; i
< svga
->curr
.velems
->count
; i
++) {
71 const struct pipe_vertex_buffer
*vb
=
72 &svga
->curr
.vb
[ve
[i
].vertex_buffer_index
];
73 const struct svga_buffer
*buffer
;
74 unsigned int offset
= vb
->buffer_offset
+ ve
[i
].src_offset
;
79 buffer
= svga_buffer(vb
->buffer
);
80 if (buffer
->uploaded
.start
> offset
) {
81 unsigned tmp_neg_bias
= buffer
->uploaded
.start
- offset
;
83 tmp_neg_bias
= (tmp_neg_bias
+ vb
->stride
- 1) / vb
->stride
;
84 neg_bias
= MAX2(neg_bias
, tmp_neg_bias
);
88 for (i
= 0; i
< svga
->curr
.velems
->count
; i
++) {
89 const struct pipe_vertex_buffer
*vb
=
90 &svga
->curr
.vb
[ve
[i
].vertex_buffer_index
];
91 unsigned usage
, index
;
92 const struct svga_buffer
*buffer
;
93 SVGA3dVertexDecl decl
;
98 buffer
= svga_buffer(vb
->buffer
);
99 svga_generate_vdecl_semantics( i
, &usage
, &index
);
103 decl
.identity
.type
= svga
->curr
.velems
->decl_type
[i
];
104 decl
.identity
.method
= SVGA3D_DECLMETHOD_DEFAULT
;
105 decl
.identity
.usage
= usage
;
106 decl
.identity
.usageIndex
= index
;
107 decl
.array
.stride
= vb
->stride
;
109 /* Compensate for partially uploaded vbo, and
110 * for the negative index bias.
112 decl
.array
.offset
= (vb
->buffer_offset
114 + neg_bias
* vb
->stride
115 - buffer
->uploaded
.start
);
117 assert(decl
.array
.offset
>= 0);
119 svga_hwtnl_vdecl( svga
->hwtnl
,
122 buffer
->uploaded
.buffer
? buffer
->uploaded
.buffer
:
126 svga_hwtnl_set_index_bias( svga
->hwtnl
, -(int) neg_bias
);
131 static enum pipe_error
132 emit_hw_vdecl(struct svga_context
*svga
, unsigned dirty
)
134 /* SVGA_NEW_NEED_SWTNL
136 if (svga
->state
.sw
.need_swtnl
)
137 return PIPE_OK
; /* Do not emit during swtnl */
139 return emit_hw_vs_vdecl( svga
, dirty
);
143 struct svga_tracked_state svga_hw_vdecl
=
145 "hw vertex decl state (hwtnl version)",
146 ( SVGA_NEW_NEED_SWTNL
|