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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* 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.
*
**************************************************************************/
#ifndef U_SIMPLE_SCREEN_H
#define U_SIMPLE_SCREEN_H
#include "pipe/p_format.h"
struct pipe_screen;
struct pipe_fence_handle;
struct pipe_surface;
struct pipe_resource;
/**
* Gallium3D drivers are (meant to be!) independent of both GL and the
* window system. The window system provides a buffer manager and a
* set of additional hooks for things like command buffer submission,
* etc.
*
* There clearly has to be some agreement between the window system
* driver and the hardware driver about the format of command buffers,
* etc.
*/
struct pipe_winsys
{
void (*destroy)( struct pipe_winsys *ws );
/** Returns name of this winsys interface */
const char *(*get_name)( struct pipe_winsys *ws );
/**
* Do any special operations to ensure buffer size is correct
*/
void (*update_buffer)( struct pipe_winsys *ws,
void *context_private );
/**
* Do any special operations to ensure frontbuffer contents are
* displayed, eg copy fake frontbuffer.
*/
void (*flush_frontbuffer)( struct pipe_winsys *ws,
struct pipe_surface *surf,
void *context_private );
/**
* Buffer management. Buffer attributes are mostly fixed over its lifetime.
*
* Remember that gallium gets to choose the interface it needs, and the
* window systems must then implement that interface (rather than the
* other way around...).
*
* usage is a bitmask of PIPE_BUFFER_USAGE_PIXEL/VERTEX/INDEX/CONSTANT. This
* usage argument is only an optimization hint, not a guarantee, therefore
* proper behavior must be observed in all circumstances.
*
* alignment indicates the client's alignment requirements, eg for
* SSE instructions.
*/
struct pipe_resource *(*buffer_create)( struct pipe_winsys *ws,
unsigned alignment,
unsigned usage,
unsigned size );
/**
* Create a buffer that wraps user-space data.
*
* Effectively this schedules a delayed call to buffer_create
* followed by an upload of the data at *some point in the future*,
* or perhaps never. Basically the allocate/upload is delayed
* until the buffer is actually passed to hardware.
*
* The intention is to provide a quick way to turn regular data
* into a buffer, and secondly to avoid a copy operation if that
* data subsequently turns out to be only accessed by the CPU.
*
* Common example is OpenGL vertex buffers that are subsequently
* processed either by software TNL in the driver or by passing to
* hardware.
*
* XXX: What happens if the delayed call to buffer_create() fails?
*
* Note that ptr may be accessed at any time upto the time when the
* buffer is destroyed, so the data must not be freed before then.
*/
struct pipe_resource *(*user_buffer_create)(struct pipe_winsys *ws,
void *ptr,
unsigned bytes);
/**
* Allocate storage for a display target surface.
*
* Often surfaces which are meant to be blitted to the front screen (i.e.,
* display targets) must be allocated with special characteristics, memory
* pools, or obtained directly from the windowing system.
*
* This callback is invoked by the pipe_screenwhen creating a texture marked
* with the PIPE_TEXTURE_USAGE_DISPLAY_TARGET flag to get the underlying
* buffer storage.
*/
struct pipe_resource *(*surface_buffer_create)(struct pipe_winsys *ws,
unsigned width, unsigned height,
enum pipe_format format,
unsigned usage,
unsigned tex_usage,
unsigned *stride);
/**
* Map the entire data store of a buffer object into the client's address.
* flags is bitmask of PIPE_BUFFER_USAGE_CPU_READ/WRITE flags.
*/
void *(*buffer_map)( struct pipe_winsys *ws,
struct pipe_resource *buf,
unsigned usage );
void (*buffer_unmap)( struct pipe_winsys *ws,
struct pipe_resource *buf );
void (*buffer_destroy)( struct pipe_resource *buf );
/** Set ptr = fence, with reference counting */
void (*fence_reference)( struct pipe_winsys *ws,
struct pipe_fence_handle **ptr,
struct pipe_fence_handle *fence );
/**
* Checks whether the fence has been signalled.
* \param flags driver-specific meaning
* \return zero on success.
*/
int (*fence_signalled)( struct pipe_winsys *ws,
struct pipe_fence_handle *fence,
unsigned flag );
/**
* Wait for the fence to finish.
* \param flags driver-specific meaning
* \return zero on success.
*/
int (*fence_finish)( struct pipe_winsys *ws,
struct pipe_fence_handle *fence,
unsigned flag );
};
/**
* The following function initializes a simple passthrough screen.
*
* All the relevant screen function pointers will forwarded to the
* winsys.
*/
void u_simple_screen_init(struct pipe_screen *screen);
/**
* Returns the name of the winsys associated with this screen.
*/
const char* u_simple_screen_winsys_name(struct pipe_screen *screen);
#endif
|
