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
|
/**************************************************************************
*
* Copyright 2009-2010 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 VMWARE 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
* Framebuffer utility functions.
*
* @author Brian Paul
*/
#include "pipe/p_screen.h"
#include "pipe/p_state.h"
#include "pipe/p_defines.h"
#include "util/u_inlines.h"
#include "util/u_memory.h"
#include "util/u_framebuffer.h"
/**
* Compare pipe_framebuffer_state objects.
* \return TRUE if same, FALSE if different
*/
boolean
util_framebuffer_state_equal(const struct pipe_framebuffer_state *dst,
const struct pipe_framebuffer_state *src)
{
unsigned i;
if (dst->width != src->width ||
dst->height != src->height)
return FALSE;
for (i = 0; i < Elements(src->cbufs); i++) {
if (dst->cbufs[i] != src->cbufs[i]) {
return FALSE;
}
}
if (dst->nr_cbufs != src->nr_cbufs) {
return FALSE;
}
if (dst->zsbuf != src->zsbuf) {
return FALSE;
}
return TRUE;
}
/**
* Copy framebuffer state from src to dst, updating refcounts.
*/
void
util_copy_framebuffer_state(struct pipe_framebuffer_state *dst,
const struct pipe_framebuffer_state *src)
{
unsigned i;
dst->width = src->width;
dst->height = src->height;
for (i = 0; i < src->nr_cbufs; i++)
pipe_surface_reference(&dst->cbufs[i], src->cbufs[i]);
/* Set remaining dest cbuf pointers to NULL */
for ( ; i < Elements(dst->cbufs); i++)
pipe_surface_reference(&dst->cbufs[i], NULL);
dst->nr_cbufs = src->nr_cbufs;
pipe_surface_reference(&dst->zsbuf, src->zsbuf);
}
void
util_unreference_framebuffer_state(struct pipe_framebuffer_state *fb)
{
unsigned i;
for (i = 0; i < fb->nr_cbufs; i++) {
pipe_surface_reference(&fb->cbufs[i], NULL);
}
pipe_surface_reference(&fb->zsbuf, NULL);
fb->width = fb->height = 0;
fb->nr_cbufs = 0;
}
/* Where multiple sizes are allowed for framebuffer surfaces, find the
* minimum width and height of all bound surfaces.
*/
boolean
util_framebuffer_min_size(const struct pipe_framebuffer_state *fb,
unsigned *width,
unsigned *height)
{
unsigned w = ~0;
unsigned h = ~0;
unsigned i;
for (i = 0; i < fb->nr_cbufs; i++) {
w = MIN2(w, fb->cbufs[i]->width);
h = MIN2(h, fb->cbufs[i]->height);
}
if (fb->zsbuf) {
w = MIN2(w, fb->zsbuf->width);
h = MIN2(h, fb->zsbuf->height);
}
if (w == ~0) {
*width = 0;
*height = 0;
return FALSE;
}
else {
*width = w;
*height = h;
return TRUE;
}
}
|
