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
|
// Fl_Overlay_Window.C
// A window using double-buffering and able to draw an overlay
// on top of that. Uses the hardware to draw the overlay if
// possible, otherwise it just draws in the front buffer.
#include <config.h>
#include <FL/Fl.H>
#include <FL/Fl_Overlay_Window.H>
#include <FL/fl_draw.H>
#include <FL/x.H>
void Fl_Overlay_Window::show() {
Fl_Double_Window::show();
if (overlay_ && overlay_ != this) overlay_->show();
}
void Fl_Overlay_Window::hide() {
Fl_Double_Window::hide();
}
void Fl_Overlay_Window::flush() {
// turn off the bit set by redraw_overlay:
clear_damage(damage()&~8);
// even if damage() == 0, flush() will erase the fake overlay by
// copying back buffer over it. It will also set the clip to the
// region made by all the expose events:
Fl_Double_Window::flush();
// Now draw the fake overlay, if any, using the current clip:
if (overlay_ == this) draw_overlay();
}
void Fl_Overlay_Window::resize(int X, int Y, int W, int H) {
Fl_Double_Window::resize(X,Y,W,H);
if (overlay_ && overlay_!=this) overlay_->resize(0,0,w(),h());
}
Fl_Overlay_Window::~Fl_Overlay_Window() {
hide();
// delete overlay; this is done by ~Fl_Group
}
#if !HAVE_OVERLAY
int Fl_Overlay_Window::can_do_overlay() {return 0;}
void Fl_Overlay_Window::redraw_overlay() {overlay_ = this; damage(8);}
#else
extern XVisualInfo *fl_find_overlay_visual();
extern XVisualInfo *fl_overlay_visual;
extern Colormap fl_overlay_colormap;
extern unsigned long fl_transparent_pixel;
static GC gc; // the GC used by all X windows
extern uchar fl_overlay; // changes how fl_color(x) works
class _Fl_Overlay : public Fl_Window {
friend class Fl_Overlay_Window;
void flush();
void show();
public:
_Fl_Overlay(int x, int y, int w, int h) :
Fl_Window(x,y,w,h) {deactivate();}
};
int Fl_Overlay_Window::can_do_overlay() {
return fl_find_overlay_visual() != 0;
}
void _Fl_Overlay::show() {
if (shown()) {Fl_Window::show(); return;}
fl_background_pixel = int(fl_transparent_pixel);
Fl_X::make_xid(this, fl_overlay_visual, fl_overlay_colormap);
fl_background_pixel = -1;
// find the outermost window to tell wm about the colormap:
Fl_Window *w = window();
for (;;) {Fl_Window *w1 = w->window(); if (!w1) break; w = w1;}
XSetWMColormapWindows(fl_display, fl_xid(w), &(Fl_X::i(this)->xid), 1);
}
void _Fl_Overlay::flush() {
fl_window = fl_xid(this);
if (!gc) gc = XCreateGC(fl_display, fl_xid(this), 0, 0);
fl_gc = gc;
fl_overlay = 1;
Fl_Overlay_Window *w = (Fl_Overlay_Window *)parent();
Fl_X *i = Fl_X::i(this);
if (damage() != 2) XClearWindow(fl_display, fl_xid(this));
fl_clip_region(i->region); i->region = 0;
w->draw_overlay();
fl_overlay = 0;
}
void Fl_Overlay_Window::redraw_overlay() {
if (!fl_display) return; // this prevents fluid -c from opening display
if (!overlay_) {
if (can_do_overlay()) {
Fl_Group::current(this);
overlay_ = new _Fl_Overlay(0,0,w(),h());
Fl_Group::current(0);
} else {
overlay_ = this; // fake the overlay
}
}
if (shown()) {
if (overlay_ == this)
damage(8);
else if (!overlay_->shown())
overlay_->show();
else
overlay_->redraw();
}
}
#endif
// End of Fl_Overlay_Window.C
|
