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 "util/u_inlines.h"
27#include "pipe/p_defines.h"
28#include "util/u_math.h"
29#include "util/u_upload_mgr.h"
30
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"
39
40
41
42static enum pipe_error
43emit_hw_vs_vdecl(struct svga_context *svga, unsigned dirty)
44{
45   const struct pipe_vertex_element *ve = svga->curr.velems->velem;
46   SVGA3dVertexDecl decls[SVGA3D_INPUTREG_MAX];
47   unsigned buffer_indexes[SVGA3D_INPUTREG_MAX];
48   unsigned i;
49   unsigned neg_bias = 0;
50
51   assert(svga->curr.velems->count >=
52          svga->curr.vs->base.info.file_count[TGSI_FILE_INPUT]);
53
54   /**
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.
58    *
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.
63    *
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
66    * confusion.
67    */
68
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;
75
76      if (!vb->buffer.resource)
77         continue;
78
79      buffer = svga_buffer(vb->buffer.resource);
80      if (buffer->uploaded.start > offset) {
81         tmp_neg_bias = buffer->uploaded.start - offset;
82         if (vb->stride)
83            tmp_neg_bias = (tmp_neg_bias + vb->stride - 1) / vb->stride;
84         neg_bias = MAX2(neg_bias, tmp_neg_bias);
85      }
86   }
87
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;
93
94      if (!vb->buffer.resource)
95         continue;
96
97      buffer = svga_buffer(vb->buffer.resource);
98      svga_generate_vdecl_semantics( i, &usage, &index );
99
100      /* SVGA_NEW_VELEMENT
101       */
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;
107
108      /* Compensate for partially uploaded vbo, and
109       * for the negative index bias.
110       */
111      decls[i].array.offset = (vb->buffer_offset
112                           + ve[i].src_offset
113			   + neg_bias * vb->stride
114			   - buffer->uploaded.start);
115
116      assert(decls[i].array.offset >= 0);
117
118      buffer_indexes[i] = ve[i].vertex_buffer_index;
119
120      assert(!buffer->uploaded.buffer);
121   }
122
123   svga_hwtnl_vertex_decls(svga->hwtnl,
124                           svga->curr.velems->count,
125                           decls,
126                           buffer_indexes,
127                           svga->curr.velems->id);
128
129   svga_hwtnl_vertex_buffers(svga->hwtnl,
130                             svga->curr.num_vertex_buffers,
131                             svga->curr.vb);
132
133   svga_hwtnl_set_index_bias( svga->hwtnl, -(int) neg_bias );
134   return PIPE_OK;
135}
136
137
138static enum pipe_error
139emit_hw_vdecl(struct svga_context *svga, unsigned dirty)
140{
141   /* SVGA_NEW_NEED_SWTNL
142    */
143   if (svga->state.sw.need_swtnl)
144      return PIPE_OK; /* Do not emit during swtnl */
145
146   return emit_hw_vs_vdecl( svga, dirty );
147}
148
149
150struct svga_tracked_state svga_hw_vdecl =
151{
152   "hw vertex decl state (hwtnl version)",
153   ( SVGA_NEW_NEED_SWTNL |
154     SVGA_NEW_VELEMENT |
155     SVGA_NEW_VBUFFER |
156     SVGA_NEW_RAST |
157     SVGA_NEW_FS |
158     SVGA_NEW_VS ),
159   emit_hw_vdecl
160};
161