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
35 struct svga_context;
36 struct u_upload_mgr;
37
38 /* Should include polygon?
39 */
40 static 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
svga_translate_prim(unsigned mode,unsigned count,unsigned * out_count)49 static 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
86 struct 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
100 struct 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
116 struct 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 */
148 enum pipe_error
149 svga_hwtnl_prim( struct svga_hwtnl *hwtnl,
150 const SVGA3dPrimitiveRange *range,
151 unsigned min_index,
152 unsigned max_index,
153 struct pipe_resource *ib );
154
155 enum pipe_error
156 svga_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