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
|
#include "gl_common.h"
/**
* \brief adjusts the GL_UNPACK_ALGNMENT to fit the stride.
* \param stride number of bytes per line for which alignment should fit.
*/
void glAdjustAlignment(int stride) {
GLint gl_alignment;
if (stride % 8 == 0)
gl_alignment=8;
else if (stride % 4 == 0)
gl_alignment=4;
else if (stride % 2 == 0)
gl_alignment=2;
else
gl_alignment=1;
glPixelStorei (GL_UNPACK_ALIGNMENT, gl_alignment);
}
#ifndef GL_WIN32
/**
* Returns the XVisualInfo associated with Window win.
* \param win Window whose XVisualInfo is returne.
* \return XVisualInfo of the window. Caller must use XFree to free it.
*/
static XVisualInfo *getWindowVisualInfo(Window win) {
XWindowAttributes xw_attr;
XVisualInfo vinfo_template;
int tmp;
XGetWindowAttributes(mDisplay, win, &xw_attr);
vinfo_template.visualid = XVisualIDFromVisual(xw_attr.visual);
return XGetVisualInfo(mDisplay, VisualIDMask, &vinfo_template, &tmp);
}
/**
* \brief Changes the window in which video is displayed.
* If possible only transfers the context to the new window, otherwise
* creates a new one, which must be initialized by the caller.
* \param vinfo Currently used visual.
* \param context Currently used context.
* \param win window that should be used for drawing.
* \return one of SET_WINDOW_FAILED, SET_WINDOW_OK or SET_WINDOW_REINIT.
* In case of SET_WINDOW_REINIT the context could not be transfered
* and the caller must initialize it correctly.
*/
int setGlWindow(XVisualInfo **vinfo, GLXContext *context, Window win)
{
XVisualInfo *new_vinfo;
GLXContext new_context = NULL;
int keep_context = 0;
// should only be needed when keeping context, but not doing glFinish
// can cause flickering even when we do not keep it.
glFinish();
new_vinfo = getWindowVisualInfo(win);
if (*context && *vinfo && new_vinfo &&
(*vinfo)->visualid == new_vinfo->visualid) {
// we can keep the GLXContext
new_context = *context;
XFree(new_vinfo);
new_vinfo = *vinfo;
keep_context = 1;
} else {
// create a context
new_context = glXCreateContext(mDisplay, new_vinfo, NULL, True);
if (!new_context) {
mp_msg(MSGT_VO, MSGL_FATAL, "[gl] Could not create GLX context!\n");
XFree(new_vinfo);
return SET_WINDOW_FAILED;
}
}
// set context
if (!glXMakeCurrent(mDisplay, vo_window, new_context)) {
mp_msg (MSGT_VO, MSGL_FATAL, "[gl] Could not set GLX context!\n");
if (!keep_context) {
glXDestroyContext (mDisplay, new_context);
XFree(new_vinfo);
}
return SET_WINDOW_FAILED;
}
// set new values
vo_window = win;
{
Window root;
int tmp;
XGetGeometry(mDisplay, vo_window, &root, &tmp, &tmp,
&vo_dwidth, &vo_dheight, &tmp, &tmp);
}
if (!keep_context) {
if (*context)
glXDestroyContext(mDisplay, *context);
*context = new_context;
if (*vinfo)
XFree(*vinfo);
*vinfo = new_vinfo;
// and inform that reinit is neccessary
return SET_WINDOW_REINIT;
}
return SET_WINDOW_OK;
}
/**
* \brief free the VisualInfo and GLXContext of an OpenGL context.
*/
void releaseGlContext(XVisualInfo **vinfo, GLXContext *context) {
if (*vinfo)
XFree(*vinfo);
*vinfo = NULL;
if (*context)
glXDestroyContext(mDisplay, *context);
*context = 0;
}
#endif
|
