summaryrefslogtreecommitdiff
path: root/src/gallium/auxiliary/draw/draw_vbuf.h
blob: e32803c0720836e319dee379ac2faa34b3b5bd4c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
/**************************************************************************
 *
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/

/**
 * \file
 * Vertex buffer drawing stage.
 * 
 * \author Keith Whitwell <keith@tungstengraphics.com>
 * \author Jose Fonseca <jrfonsec@tungstengraphics.com>
 */

#ifndef DRAW_VBUF_H_
#define DRAW_VBUF_H_


#include "pipe/p_compiler.h"


struct pipe_rasterizer_state;
struct draw_context;
struct vertex_info;


/**
 * Interface for hardware vertex buffer rendering.
 */
struct vbuf_render {

   /**
    * Driver limits.  May be tuned lower to improve cache hits on
    * index list.
    */
   unsigned max_indices;
   unsigned max_vertex_buffer_bytes;

   /**
    * Query if the hardware driver needs assistance for a particular
    * combination of rasterizer state and primitive.
    *
    * Currently optional.
    */
   boolean (*need_pipeline)(const struct vbuf_render *render,
                            const struct pipe_rasterizer_state *rasterizer,
                            unsigned int prim );


   /**
    * Get the hardware vertex format.
    * 
    * XXX: have this in draw_context instead?
    */ 
   const struct vertex_info *(*get_vertex_info)( struct vbuf_render * );
	 
   /**
    * Request a destination for vertices.
    * Hardware renderers will use ttm memory, others will just malloc
    * something.
    */
   boolean (*allocate_vertices)( struct vbuf_render *,
                                 ushort vertex_size,
                                 ushort nr_vertices );
   
   void *(*map_vertices)( struct vbuf_render * );
   void (*unmap_vertices)( struct vbuf_render *, 
                           ushort min_index,
                           ushort max_index );

   /**
    * Notify the renderer of the current primitive when it changes.
    * Must succeed for TRIANGLES, LINES and POINTS.  Other prims at
    * the discretion of the driver, for the benefit of the passthrough
    * path.
    */
   boolean (*set_primitive)( struct vbuf_render *, unsigned prim );

   /**
    * Draw indexed primitives.  Note that indices are ushort.  The driver
    * must complete this call, if necessary splitting the index list itself.
    */
   void (*draw_elements)( struct vbuf_render *,
                          const ushort *indices,
                          uint nr_indices );

   /* Draw non-indexed primitives.
    */
   void (*draw_arrays)( struct vbuf_render *,
			unsigned start,
			uint nr );

   /**
    * Called when vbuf is done with this set of vertices:
    */
   void (*release_vertices)( struct vbuf_render * );

   void (*destroy)( struct vbuf_render * );


   /**
    * Called after writing data to the stream out buffers
    */
   void (*set_stream_output_info)( struct vbuf_render *vbufr,
                                   unsigned primitive_count,
                                   unsigned vertices_count );
};



struct draw_stage *
draw_vbuf_stage( struct draw_context *draw,
                 struct vbuf_render *render );


#endif /*DRAW_VBUF_H_*/