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"
38 #include "svga_hw_reg.h"
41 /***********************************************************************
45 static int emit_hw_vs_vdecl( struct svga_context *svga,
48 const struct pipe_vertex_element *ve = svga->curr.velems->velem;
49 SVGA3dVertexDecl decl;
51 unsigned neg_bias = 0;
53 assert(svga->curr.velems->count >=
54 svga->curr.vs->base.info.file_count[TGSI_FILE_INPUT]);
56 svga_hwtnl_reset_vdecl( svga->hwtnl,
57 svga->curr.velems->count );
60 * We can't set the VDECL offset to something negative, so we
61 * must calculate a common negative additional index bias, and modify
62 * the VDECL offsets accordingly so they *all* end up positive.
64 * Note that the exact value of the negative index bias is not that
65 * important, since we compensate for it when we calculate the vertex
66 * buffer offset below. The important thing is that all vertex buffer
67 * offsets remain positive.
69 * Note that we use a negative bias variable in order to make the
70 * rounding maths more easy to follow, and to avoid int / unsigned
74 for (i = 0; i < svga->curr.velems->count; i++) {
75 const struct pipe_vertex_buffer *vb =
76 &svga->curr.vb[ve[i].vertex_buffer_index];
77 struct svga_buffer *buffer;
78 unsigned int offset = vb->buffer_offset + ve[i].src_offset;
79 unsigned tmp_neg_bias = 0;
84 buffer = svga_buffer(vb->buffer);
85 if (buffer->uploaded.start > offset) {
86 tmp_neg_bias = buffer->uploaded.start - offset;
88 tmp_neg_bias = (tmp_neg_bias + vb->stride - 1) / vb->stride;
89 neg_bias = MAX2(neg_bias, tmp_neg_bias);
93 for (i = 0; i < svga->curr.velems->count; i++) {
94 const struct pipe_vertex_buffer *vb =
95 &svga->curr.vb[ve[i].vertex_buffer_index];
96 unsigned usage, index;
97 struct svga_buffer *buffer;
102 buffer= svga_buffer(vb->buffer);
103 svga_generate_vdecl_semantics( i, &usage, &index );
107 decl.identity.type = svga->state.sw.ve_format[i];
108 decl.identity.method = SVGA3D_DECLMETHOD_DEFAULT;
109 decl.identity.usage = usage;
110 decl.identity.usageIndex = index;
111 decl.array.stride = vb->stride;
113 /* Compensate for partially uploaded vbo, and
114 * for the negative index bias.
116 decl.array.offset = (vb->buffer_offset
118 + neg_bias * vb->stride
119 - buffer->uploaded.start);
121 assert(decl.array.offset >= 0);
123 svga_hwtnl_vdecl( svga->hwtnl,
126 buffer->uploaded.buffer ? buffer->uploaded.buffer :
130 svga_hwtnl_set_index_bias( svga->hwtnl, -neg_bias );
135 static int emit_hw_vdecl( struct svga_context *svga,
138 /* SVGA_NEW_NEED_SWTNL
140 if (svga->state.sw.need_swtnl)
141 return 0; /* Do not emit during swtnl */
143 return emit_hw_vs_vdecl( svga, dirty );
147 struct svga_tracked_state svga_hw_vdecl =
149 "hw vertex decl state (hwtnl version)",
150 ( SVGA_NEW_NEED_SWTNL |