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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
#include "egl.h"
#include "library_loader.h"
#include <string.h>
static bool gsr_egl_create_window(gsr_egl *self) {
EGLConfig ecfg;
int32_t num_config = 0;
EGLDisplay egl_display = NULL;
EGLSurface egl_surface = NULL;
EGLContext egl_context = NULL;
Window window = None;
int32_t attr[] = {
EGL_BUFFER_SIZE, 24,
EGL_RENDERABLE_TYPE,
EGL_OPENGL_ES2_BIT,
EGL_NONE
};
int32_t ctxattr[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
window = XCreateWindow(self->dpy, DefaultRootWindow(self->dpy), 0, 0, 1, 1, 0, CopyFromParent, InputOutput, CopyFromParent, 0, NULL);
if(!window) {
fprintf(stderr, "gsr error: gsr_gl_create_window failed: failed to create gl window\n");
goto fail;
}
egl_display = self->eglGetDisplay(self->dpy);
if(!egl_display) {
fprintf(stderr, "gsr error: gsr_egl_create_window failed: eglGetDisplay failed\n");
goto fail;
}
if(!self->eglInitialize(egl_display, NULL, NULL)) {
fprintf(stderr, "gsr error: gsr_egl_create_window failed: eglInitialize failed\n");
goto fail;
}
if(!self->eglChooseConfig(egl_display, attr, &ecfg, 1, &num_config) || num_config != 1) {
fprintf(stderr, "gsr error: gsr_egl_create_window failed: failed to find a matching config\n");
goto fail;
}
egl_surface = self->eglCreateWindowSurface(egl_display, ecfg, (EGLNativeWindowType)window, NULL);
if(!egl_surface) {
fprintf(stderr, "gsr error: gsr_egl_create_window failed: failed to create window surface\n");
goto fail;
}
egl_context = self->eglCreateContext(egl_display, ecfg, NULL, ctxattr);
if(!egl_context) {
fprintf(stderr, "gsr error: gsr_egl_create_window failed: failed to create egl context\n");
goto fail;
}
self->eglMakeCurrent(egl_display, egl_surface, egl_surface, egl_context);
self->egl_display = egl_display;
self->egl_surface = egl_surface;
self->egl_context = egl_context;
self->window = window;
return true;
fail:
if(egl_context)
self->eglDestroyContext(egl_display, egl_context);
if(egl_surface)
self->eglDestroySurface(egl_display, egl_surface);
if(egl_display)
self->eglTerminate(egl_display);
if(window)
XDestroyWindow(self->dpy, window);
return false;
}
static bool gsr_egl_load_egl(gsr_egl *self, void *library) {
dlsym_assign required_dlsym[] = {
{ (void**)&self->eglGetDisplay, "eglGetDisplay" },
{ (void**)&self->eglInitialize, "eglInitialize" },
{ (void**)&self->eglTerminate, "eglTerminate" },
{ (void**)&self->eglChooseConfig, "eglChooseConfig" },
{ (void**)&self->eglCreateWindowSurface, "eglCreateWindowSurface" },
{ (void**)&self->eglCreateContext, "eglCreateContext" },
{ (void**)&self->eglMakeCurrent, "eglMakeCurrent" },
{ (void**)&self->eglDestroyContext, "eglDestroyContext" },
{ (void**)&self->eglDestroySurface, "eglDestroySurface" },
{ NULL, NULL }
};
if(!dlsym_load_list(library, required_dlsym)) {
fprintf(stderr, "gsr error: gsr_egl_load failed: missing required symbols in libEGL.so.1\n");
return false;
}
return true;
}
static bool gsr_egl_load_gl(gsr_egl *self, void *library) {
dlsym_assign required_dlsym[] = {
{ (void**)&self->glGetString, "glGetString" },
{ NULL, NULL }
};
if(!dlsym_load_list(library, required_dlsym)) {
fprintf(stderr, "gsr error: gsr_egl_load failed: missing required symbols in libGL.so.1\n");
return false;
}
return true;
}
bool gsr_egl_load(gsr_egl *self, Display *dpy) {
memset(self, 0, sizeof(gsr_egl));
self->dpy = dpy;
dlerror(); /* clear */
void *egl_lib = dlopen("libEGL.so.1", RTLD_LAZY);
if(!egl_lib) {
fprintf(stderr, "gsr error: gsr_egl_load: failed to load libEGL.so.1, error: %s\n", dlerror());
return false;
}
void *gl_lib = dlopen("libGL.so.1", RTLD_LAZY);
if(!egl_lib) {
fprintf(stderr, "gsr error: gsr_egl_load: failed to load libGL.so.1, error: %s\n", dlerror());
dlclose(egl_lib);
memset(self, 0, sizeof(gsr_egl));
return false;
}
if(!gsr_egl_load_egl(self, egl_lib)) {
dlclose(egl_lib);
dlclose(gl_lib);
memset(self, 0, sizeof(gsr_egl));
return false;
}
if(!gsr_egl_load_gl(self, gl_lib)) {
dlclose(egl_lib);
dlclose(gl_lib);
memset(self, 0, sizeof(gsr_egl));
return false;
}
if(!gsr_egl_create_window(self)) {
dlclose(egl_lib);
dlclose(gl_lib);
memset(self, 0, sizeof(gsr_egl));
return false;
}
self->egl_library = egl_lib;
self->gl_library = gl_lib;
return true;
}
void gsr_egl_unload(gsr_egl *self) {
if(self->egl_context) {
self->eglDestroyContext(self->egl_display, self->egl_context);
self->egl_context = NULL;
}
if(self->egl_surface) {
self->eglDestroySurface(self->egl_display, self->egl_surface);
self->egl_surface = NULL;
}
if(self->egl_display) {
self->eglTerminate(self->egl_display);
self->egl_display = NULL;
}
if(self->window) {
XDestroyWindow(self->dpy, self->window);
self->window = None;
}
if(self->egl_library) {
dlclose(self->egl_library);
self->egl_library = NULL;
}
if(self->gl_library) {
dlclose(self->gl_library);
self->gl_library = NULL;
}
memset(self, 0, sizeof(gsr_egl));
}
|
