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_shader.h"
37 #include "svga_resource_buffer.h"
38 #include "svga_hw_reg.h"
42 static enum pipe_error
43 emit_hw_vs_vdecl(struct svga_context
*svga
, unsigned dirty
)
45 const struct pipe_vertex_element
*ve
= svga
->curr
.velems
->velem
;
46 SVGA3dVertexDecl decls
[SVGA3D_INPUTREG_MAX
];
47 unsigned buffer_indexes
[SVGA3D_INPUTREG_MAX
];
49 unsigned neg_bias
= 0;
51 assert(svga
->curr
.velems
->count
>=
52 svga
->curr
.vs
->base
.info
.file_count
[TGSI_FILE_INPUT
]);
55 * We can't set the VDECL offset to something negative, so we
56 * must calculate a common negative additional index bias, and modify
57 * the VDECL offsets accordingly so they *all* end up positive.
59 * Note that the exact value of the negative index bias is not that
60 * important, since we compensate for it when we calculate the vertex
61 * buffer offset below. The important thing is that all vertex buffer
62 * offsets remain positive.
64 * Note that we use a negative bias variable in order to make the
65 * rounding maths more easy to follow, and to avoid int / unsigned
69 for (i
= 0; i
< svga
->curr
.velems
->count
; i
++) {
70 const struct pipe_vertex_buffer
*vb
=
71 &svga
->curr
.vb
[ve
[i
].vertex_buffer_index
];
72 struct svga_buffer
*buffer
;
73 unsigned int offset
= vb
->buffer_offset
+ ve
[i
].src_offset
;
74 unsigned tmp_neg_bias
= 0;
76 if (!vb
->buffer
.resource
)
79 buffer
= svga_buffer(vb
->buffer
.resource
);
80 if (buffer
->uploaded
.start
> offset
) {
81 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 struct svga_buffer
*buffer
;
94 if (!vb
->buffer
.resource
)
97 buffer
= svga_buffer(vb
->buffer
.resource
);
98 svga_generate_vdecl_semantics( i
, &usage
, &index
);
102 decls
[i
].identity
.type
= svga
->curr
.velems
->decl_type
[i
];
103 decls
[i
].identity
.method
= SVGA3D_DECLMETHOD_DEFAULT
;
104 decls
[i
].identity
.usage
= usage
;
105 decls
[i
].identity
.usageIndex
= index
;
106 decls
[i
].array
.stride
= vb
->stride
;
108 /* Compensate for partially uploaded vbo, and
109 * for the negative index bias.
111 decls
[i
].array
.offset
= (vb
->buffer_offset
113 + neg_bias
* vb
->stride
114 - buffer
->uploaded
.start
);
116 assert(decls
[i
].array
.offset
>= 0);
118 buffer_indexes
[i
] = ve
[i
].vertex_buffer_index
;
120 assert(!buffer
->uploaded
.buffer
);
123 svga_hwtnl_vertex_decls(svga
->hwtnl
,
124 svga
->curr
.velems
->count
,
127 svga
->curr
.velems
->id
);
129 svga_hwtnl_vertex_buffers(svga
->hwtnl
,
130 svga
->curr
.num_vertex_buffers
,
133 svga_hwtnl_set_index_bias( svga
->hwtnl
, -(int) neg_bias
);
138 static enum pipe_error
139 emit_hw_vdecl(struct svga_context
*svga
, unsigned dirty
)
141 /* SVGA_NEW_NEED_SWTNL
143 if (svga
->state
.sw
.need_swtnl
)
144 return PIPE_OK
; /* Do not emit during swtnl */
146 return emit_hw_vs_vdecl( svga
, dirty
);
150 struct svga_tracked_state svga_hw_vdecl
=
152 "hw vertex decl state (hwtnl version)",
153 ( SVGA_NEW_NEED_SWTNL
|