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#ifndef SVGA_DRAW_H_
27#define SVGA_DRAW_H_
28
29#include "pipe/p_compiler.h"
30#include "pipe/p_defines.h"
31#include "indices/u_indices.h"
32#include "svga_hw_reg.h"
33#include "svga3d_shaderdefs.h"
34
35struct svga_context;
36struct u_upload_mgr;
37
38/* Should include polygon?
39 */
40static const unsigned svga_hw_prims =
41   ((1 << PIPE_PRIM_POINTS) |
42    (1 << PIPE_PRIM_LINES) |
43    (1 << PIPE_PRIM_LINE_STRIP) |
44    (1 << PIPE_PRIM_TRIANGLES) |
45    (1 << PIPE_PRIM_TRIANGLE_STRIP) |
46    (1 << PIPE_PRIM_TRIANGLE_FAN));
47
48
49static INLINE unsigned svga_translate_prim(unsigned mode,
50                                           unsigned count,
51                                           unsigned *out_count)
52{
53   switch (mode) {
54   case PIPE_PRIM_POINTS:
55      *out_count = count;
56      return SVGA3D_PRIMITIVE_POINTLIST;
57
58   case PIPE_PRIM_LINES:
59      *out_count = count / 2;
60      return SVGA3D_PRIMITIVE_LINELIST;
61
62   case PIPE_PRIM_LINE_STRIP:
63      *out_count = count - 1;
64      return SVGA3D_PRIMITIVE_LINESTRIP;
65
66   case PIPE_PRIM_TRIANGLES:
67      *out_count = count / 3;
68      return SVGA3D_PRIMITIVE_TRIANGLELIST;
69
70   case PIPE_PRIM_TRIANGLE_STRIP:
71      *out_count = count - 2;
72      return SVGA3D_PRIMITIVE_TRIANGLESTRIP;
73
74   case PIPE_PRIM_TRIANGLE_FAN:
75      *out_count = count - 2;
76      return SVGA3D_PRIMITIVE_TRIANGLEFAN;
77
78   default:
79      assert(0);
80      *out_count = 0;
81      return 0;
82   }
83}
84
85
86struct index_cache {
87   u_generate_func generate;
88   unsigned gen_nr;
89
90   /* If non-null, this buffer is filled by calling
91    *   generate(nr, map(buffer))
92    */
93   struct pipe_resource *buffer;
94};
95
96
97/** Max number of primitives per draw call */
98#define QSZ SVGA3D_MAX_DRAW_PRIMITIVE_RANGES
99
100struct draw_cmd {
101   struct svga_winsys_context *swc;
102
103   SVGA3dVertexDecl vdecl[SVGA3D_INPUTREG_MAX];
104   struct pipe_resource *vdecl_vb[SVGA3D_INPUTREG_MAX];
105   unsigned vdecl_count;
106
107   SVGA3dPrimitiveRange prim[QSZ];
108   struct pipe_resource *prim_ib[QSZ];
109   unsigned prim_count;
110   unsigned min_index[QSZ];
111   unsigned max_index[QSZ];
112};
113
114#define IDX_CACHE_MAX  8
115
116struct svga_hwtnl {
117   struct svga_context *svga;
118   struct u_upload_mgr *upload_ib;
119
120   /* Additional negative index bias due to partial buffer uploads
121    * This is compensated for in the offset associated with all
122    * vertex buffers.
123    */
124
125   int index_bias;
126
127   /* Flatshade information:
128    */
129   unsigned api_pv;
130   unsigned hw_pv;
131   unsigned api_fillmode;
132
133   /* Cache the results of running a particular generate func on each
134    * primitive type.
135    */
136   struct index_cache index_cache[PIPE_PRIM_MAX][IDX_CACHE_MAX];
137
138   /* Try to build the maximal draw command packet before emitting:
139    */
140   struct draw_cmd cmd;
141};
142
143
144
145/***********************************************************************
146 * Internal functions
147 */
148enum pipe_error
149svga_hwtnl_prim( struct svga_hwtnl *hwtnl,
150                 const SVGA3dPrimitiveRange *range,
151                 unsigned min_index,
152                 unsigned max_index,
153                 struct pipe_resource *ib );
154
155enum pipe_error
156svga_hwtnl_simple_draw_range_elements( struct svga_hwtnl *hwtnl,
157                                       struct pipe_resource *indexBuffer,
158                                       unsigned index_size,
159                                       int index_bias,
160                                       unsigned min_index,
161                                       unsigned max_index,
162                                       unsigned prim,
163                                       unsigned start,
164                                       unsigned count );
165
166
167#endif
168