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
|
/* $XFree86: xc/programs/Xserver/GL/glx/glxmem.c,v 1.4 1999/07/18 08:34:23 dawes Exp $ */
/*
** The contents of this file are subject to the GLX Public License Version 1.0
** (the "License"). You may not use this file except in compliance with the
** License. You may obtain a copy of the License at Silicon Graphics, Inc.,
** attn: Legal Services, 2011 N. Shoreline Blvd., Mountain View, CA 94043
** or at http://www.sgi.com/software/opensource/glx/license.html.
**
** Software distributed under the License is distributed on an "AS IS"
** basis. ALL WARRANTIES ARE DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY
** IMPLIED WARRANTIES OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
** PURPOSE OR OF NON- INFRINGEMENT. See the License for the specific
** language governing rights and limitations under the License.
**
** The Original Software is GLX version 1.2 source code, released February,
** 1999. The developer of the Original Software is Silicon Graphics, Inc.
** Those portions of the Subject Software created by Silicon Graphics, Inc.
** are Copyright (c) 1991-9 Silicon Graphics, Inc. All Rights Reserved.
**
** $SGI$
*/
/*
** Implementation of a buffer in main memory
*/
#include "glxserver.h"
#include "glxmem.h"
#include "glxext.h"
#include "GL/internal/glcore.h"
/* don't want to include glmath.h */
extern GLuint __glFloorLog2(GLuint);
/* ---------------------------------------------------------- */
#define BUF_ALIGN 32 /* x86 cache alignment (used for assembly paths) */
#define BUF_ALIGN_MASK (BUF_ALIGN-1)
static GLboolean
Resize(__GLdrawableBuffer *buf,
GLint x, GLint y, GLuint width, GLuint height,
__GLdrawablePrivate *glPriv, GLuint bufferMask)
{
__GLXdrawablePrivate *glxPriv = (__GLXdrawablePrivate *) glPriv->other;
GLuint newSize;
void *ubase;
GLint pixelWidth;
GLint alignedWidth;
/*
** Note:
** buf->handle : unaligned base
** buf->base : aligned base
*/
pixelWidth = BUF_ALIGN / buf->elementSize;
alignedWidth = (width & ~(pixelWidth-1)) + pixelWidth;
newSize = alignedWidth * height * buf->elementSize;
/*
** Only allocate buffer space for the SGI core.
** Mesa handles its own buffer allocations.
*/
#if defined(__GL_BUFFER_SIZE_TRACKS_WINDOW)
if (__glXCoreType() == GL_CORE_SGI) {
#else
if (newSize > buf->size && __glXCoreType() == GL_CORE_SGI) {
#endif
if (buf->handle) {
ubase = (*glPriv->realloc)(buf->handle, newSize + BUF_ALIGN_MASK);
if (ubase == NULL) {
return GL_FALSE;
}
} else {
ubase = (*glPriv->malloc)(newSize + BUF_ALIGN_MASK);
if (ubase == NULL) {
return GL_FALSE;
}
}
buf->size = newSize;
buf->handle = ubase;
buf->base = (void *)(((size_t)ubase + BUF_ALIGN_MASK) &
(unsigned int) ~BUF_ALIGN_MASK);
assert(((size_t)buf->base % BUF_ALIGN) == 0);
}
buf->width = width;
buf->height = height;
buf->byteWidth = alignedWidth * buf->elementSize;
buf->outerWidth = alignedWidth;
return GL_TRUE;
}
static void
Lock(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv)
{
}
static void
Unlock(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv)
{
}
static void
Free(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv)
{
if (buf->handle) {
(*glPriv->free)(buf->handle);
buf->handle = NULL;
}
}
void
__glXInitMem(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv, GLint bits)
{
buf->width = buf->height = 0; /* to be filled during Update */
buf->depth = bits;
buf->size = 0;
buf->handle = buf->base = NULL; /* to be filled during Update */
buf->byteWidth = 0;
buf->elementSize = ((bits - 1) / 8) + 1;
buf->elementSizeLog2 = __glFloorLog2(buf->elementSize);
buf->resize = Resize;
buf->lock = Lock;
buf->unlock = Unlock;
buf->fill = NULL;
buf->free = Free;
}
|
