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
|
#include "compositor.h"
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <time.h>
static double clock_get_monotonic_seconds(void) {
struct timespec ts;
ts.tv_sec = 0;
ts.tv_nsec = 0;
clock_gettime(CLOCK_MONOTONIC, &ts);
return (double)ts.tv_sec + (double)ts.tv_nsec * 0.000000001;
}
static ngxc_window* ngxc_compositor_get_window_by_id(ngxc_compositor *self, Window window) {
for(int i = 0; i < self->num_windows; ++i) {
ngxc_window *window_obj = &self->windows[i];
if(window_obj->texture.window == window)
return window_obj;
}
return NULL;
}
void ngxc_compositor_init(ngxc_compositor *self, Display *dpy, Window composite_window) {
memset(self, 0, sizeof(*self));
self->dpy = dpy;
self->composite_window = composite_window;
self->frame_timer = clock_get_monotonic_seconds();
}
void ngxc_compositor_deinit(ngxc_compositor *self) {
}
void ngxc_compositor_add_window(ngxc_compositor *self, Window window) {
if(self->num_windows == NGXC_COMPOSITOR_MAX_WINDOWS) {
fprintf(stderr, "error: reached max number of trackable windows (%d), ignoring window with id %ld\n", NGXC_COMPOSITOR_MAX_WINDOWS, window);
return;
}
XWindowAttributes xattr;
if(!XGetWindowAttributes(self->dpy, window, &xattr)) {
fprintf(stderr, "error: failed to get window attributes, ignoring window with id %ld\n", window);
return;
}
//Window c;
//XTranslateCoordinates(self->dpy, window, DefaultRootWindow(self->dpy), 0, 0, &xattr.x, &xattr.y, &c);
ngxc_window *window_obj = &self->windows[self->num_windows];
if(window_texture_init(&window_obj->texture, self->dpy, window) != 0) {
fprintf(stderr, "error: failed to create window texture, ignoring window with id %ld\n", window);
return;
}
window_obj->x = xattr.x;
window_obj->y = xattr.y;
++self->num_windows;
fprintf(stderr, "ADDED WINDOW: %ld, x: %d, y: %d\n", window, xattr.x, xattr.y);
}
void ngxc_compositor_remove_window(ngxc_compositor *self, Window window) {
for(int i = 0; i < self->num_windows; ++i) {
if(self->windows[i].texture.window != window)
continue;
window_texture_deinit(&self->windows[i].texture);
for(int j = i + 1; j < self->num_windows; ++j) {
self->windows[j - 1] = self->windows[j];
}
self->num_windows--;
break;
}
}
static void render_texture(const ngxc_window *window) {
float matrix[16] = {
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f,
};
matrix[0] = 1.0f / (float)window->texture.width;
matrix[5] = 1.0f / (float)window->texture.height;
glMatrixMode(GL_TEXTURE);
glLoadMatrixf(matrix);
glMatrixMode(GL_MODELVIEW);
glBindTexture(GL_TEXTURE_2D, window->texture.texture_id);
glColor4ub(255, 255, 255, 255);
//glTranslatef(window->x, window->y, 0.0f);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f);
glVertex2f(window->x, window->y);
glTexCoord2f(window->texture.width, 0.0f);
glVertex2f(window->x + window->texture.width, window->y);
glTexCoord2f(window->texture.width, window->texture.height);
glVertex2f(window->x + window->texture.width, window->y + window->texture.height);
glTexCoord2f(0.0f, window->texture.height);
glVertex2f(window->x, window->y + window->texture.height);
glEnd();
glLoadIdentity();
glBindTexture(GL_TEXTURE_2D, 0);
}
/* TODO: Skip windows that are not visible on the screen */
/* TODO: Disable compositing for fullscreen windows, if that option is enabled */
void ngxc_compositor_render(ngxc_compositor *self) {
glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
for(int i = 0; i < self->num_windows; ++i) {
const ngxc_window *window_obj = &self->windows[i];
render_texture(window_obj);
}
const double now = clock_get_monotonic_seconds();
const double frame_duration = now - self->frame_timer;
glXSwapBuffers(self->dpy, self->composite_window);
glFlush();
glFinish();
const double time_limit = 1.0f / 60.0f; // TODO: Get from randr
const double delayed_update = time_limit - frame_duration - 0.002;
//fprintf(stderr, "delayed update: %f\n", delayed_update);
if(delayed_update > 0.0)
usleep(delayed_update * 1000000.0);
self->frame_timer = clock_get_monotonic_seconds();
}
void ngxc_compositor_on_configure(ngxc_compositor *self, const XConfigureEvent *configure_event) {
ngxc_window *window_obj = ngxc_compositor_get_window_by_id(self, configure_event->window);
if(!window_obj)
return;
window_obj->x = configure_event->x;
window_obj->y = configure_event->y;
if(configure_event->width != window_obj->texture.width || configure_event->height != window_obj->texture.height) {
window_texture_on_resize(&window_obj->texture);
}
}
|
