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
|
#include "../include/window_texture.h"
#include <X11/extensions/Xcomposite.h>
static int x11_supports_composite_named_window_pixmap(Display *display) {
int extension_major;
int extension_minor;
if(!XCompositeQueryExtension(display, &extension_major, &extension_minor))
return 0;
int major_version;
int minor_version;
return XCompositeQueryVersion(display, &major_version, &minor_version) && (major_version > 0 || minor_version >= 2);
}
int window_texture_init(WindowTexture *window_texture, Display *display, Window window, gsr_egl *egl) {
window_texture->display = display;
window_texture->window = window;
window_texture->pixmap = None;
window_texture->image = NULL;
window_texture->texture_id = 0;
window_texture->redirected = 0;
window_texture->egl = egl;
if(!x11_supports_composite_named_window_pixmap(display))
return 1;
XCompositeRedirectWindow(display, window, CompositeRedirectAutomatic);
window_texture->redirected = 1;
return window_texture_on_resize(window_texture);
}
static void window_texture_cleanup(WindowTexture *self, int delete_texture) {
if(delete_texture && self->texture_id) {
self->egl->glDeleteTextures(1, &self->texture_id);
self->texture_id = 0;
}
if(self->image) {
self->egl->eglDestroyImage(self->egl->egl_display, self->image);
self->image = NULL;
}
if(self->pixmap) {
XFreePixmap(self->display, self->pixmap);
self->pixmap = None;
}
}
void window_texture_deinit(WindowTexture *self) {
if(self->redirected) {
XCompositeUnredirectWindow(self->display, self->window, CompositeRedirectAutomatic);
self->redirected = 0;
}
window_texture_cleanup(self, 1);
}
int window_texture_on_resize(WindowTexture *self) {
window_texture_cleanup(self, 0);
int result = 0;
Pixmap pixmap = None;
unsigned int texture_id = 0;
EGLImage image = NULL;
const intptr_t pixmap_attrs[] = {
EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
EGL_NONE,
};
pixmap = XCompositeNameWindowPixmap(self->display, self->window);
if(!pixmap) {
result = 2;
goto cleanup;
}
if(self->texture_id == 0) {
self->egl->glGenTextures(1, &texture_id);
if(texture_id == 0) {
result = 3;
goto cleanup;
}
self->egl->glBindTexture(GL_TEXTURE_2D, texture_id);
} else {
self->egl->glBindTexture(GL_TEXTURE_2D, self->texture_id);
texture_id = self->texture_id;
}
const float border_color[4] = { 0.0f, 0.0f, 0.0f, 0.0f };
self->egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
self->egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
self->egl->glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, border_color);
self->egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
self->egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
while(self->egl->glGetError()) {}
while(self->egl->eglGetError() != EGL_SUCCESS) {}
image = self->egl->eglCreateImage(self->egl->egl_display, NULL, EGL_NATIVE_PIXMAP_KHR, (EGLClientBuffer)pixmap, pixmap_attrs);
if(!image) {
result = 4;
goto cleanup;
}
self->egl->glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
if(self->egl->glGetError() != 0 || self->egl->eglGetError() != EGL_SUCCESS) {
result = 5;
goto cleanup;
}
self->pixmap = pixmap;
self->texture_id = texture_id;
self->image = image;
cleanup:
self->egl->glBindTexture(GL_TEXTURE_2D, 0);
if(result != 0) {
if(image)
self->egl->eglDestroyImage(self->egl->egl_display, image);
if(texture_id != 0)
self->egl->glDeleteTextures(1, &texture_id);
if(pixmap)
XFreePixmap(self->display, pixmap);
}
return result;
}
unsigned int window_texture_get_opengl_texture_id(WindowTexture *self) {
return self->texture_id;
}
|
