1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4 #include <glad/glx.h>
5 
6 #ifndef GLAD_IMPL_UTIL_C_
7 #define GLAD_IMPL_UTIL_C_
8 
9 #ifdef _MSC_VER
10 #define GLAD_IMPL_UTIL_SSCANF sscanf_s
11 #else
12 #define GLAD_IMPL_UTIL_SSCANF sscanf
13 #endif
14 
15 #endif /* GLAD_IMPL_UTIL_C_ */
16 
17 
18 int GLAD_GLX_VERSION_1_0 = 0;
19 int GLAD_GLX_VERSION_1_1 = 0;
20 int GLAD_GLX_VERSION_1_2 = 0;
21 int GLAD_GLX_VERSION_1_3 = 0;
22 int GLAD_GLX_VERSION_1_4 = 0;
23 int GLAD_GLX_EXT_swap_control = 0;
24 int GLAD_GLX_MESA_swap_control = 0;
25 
26 
27 
28 PFNGLXCHOOSEFBCONFIGPROC glad_glXChooseFBConfig = NULL;
29 PFNGLXCHOOSEVISUALPROC glad_glXChooseVisual = NULL;
30 PFNGLXCOPYCONTEXTPROC glad_glXCopyContext = NULL;
31 PFNGLXCREATECONTEXTPROC glad_glXCreateContext = NULL;
32 PFNGLXCREATEGLXPIXMAPPROC glad_glXCreateGLXPixmap = NULL;
33 PFNGLXCREATENEWCONTEXTPROC glad_glXCreateNewContext = NULL;
34 PFNGLXCREATEPBUFFERPROC glad_glXCreatePbuffer = NULL;
35 PFNGLXCREATEPIXMAPPROC glad_glXCreatePixmap = NULL;
36 PFNGLXCREATEWINDOWPROC glad_glXCreateWindow = NULL;
37 PFNGLXDESTROYCONTEXTPROC glad_glXDestroyContext = NULL;
38 PFNGLXDESTROYGLXPIXMAPPROC glad_glXDestroyGLXPixmap = NULL;
39 PFNGLXDESTROYPBUFFERPROC glad_glXDestroyPbuffer = NULL;
40 PFNGLXDESTROYPIXMAPPROC glad_glXDestroyPixmap = NULL;
41 PFNGLXDESTROYWINDOWPROC glad_glXDestroyWindow = NULL;
42 PFNGLXGETCLIENTSTRINGPROC glad_glXGetClientString = NULL;
43 PFNGLXGETCONFIGPROC glad_glXGetConfig = NULL;
44 PFNGLXGETCURRENTCONTEXTPROC glad_glXGetCurrentContext = NULL;
45 PFNGLXGETCURRENTDISPLAYPROC glad_glXGetCurrentDisplay = NULL;
46 PFNGLXGETCURRENTDRAWABLEPROC glad_glXGetCurrentDrawable = NULL;
47 PFNGLXGETCURRENTREADDRAWABLEPROC glad_glXGetCurrentReadDrawable = NULL;
48 PFNGLXGETFBCONFIGATTRIBPROC glad_glXGetFBConfigAttrib = NULL;
49 PFNGLXGETFBCONFIGSPROC glad_glXGetFBConfigs = NULL;
50 PFNGLXGETPROCADDRESSPROC glad_glXGetProcAddress = NULL;
51 PFNGLXGETSELECTEDEVENTPROC glad_glXGetSelectedEvent = NULL;
52 PFNGLXGETSWAPINTERVALMESAPROC glad_glXGetSwapIntervalMESA = NULL;
53 PFNGLXGETVISUALFROMFBCONFIGPROC glad_glXGetVisualFromFBConfig = NULL;
54 PFNGLXISDIRECTPROC glad_glXIsDirect = NULL;
55 PFNGLXMAKECONTEXTCURRENTPROC glad_glXMakeContextCurrent = NULL;
56 PFNGLXMAKECURRENTPROC glad_glXMakeCurrent = NULL;
57 PFNGLXQUERYCONTEXTPROC glad_glXQueryContext = NULL;
58 PFNGLXQUERYDRAWABLEPROC glad_glXQueryDrawable = NULL;
59 PFNGLXQUERYEXTENSIONPROC glad_glXQueryExtension = NULL;
60 PFNGLXQUERYEXTENSIONSSTRINGPROC glad_glXQueryExtensionsString = NULL;
61 PFNGLXQUERYSERVERSTRINGPROC glad_glXQueryServerString = NULL;
62 PFNGLXQUERYVERSIONPROC glad_glXQueryVersion = NULL;
63 PFNGLXSELECTEVENTPROC glad_glXSelectEvent = NULL;
64 PFNGLXSWAPBUFFERSPROC glad_glXSwapBuffers = NULL;
65 PFNGLXSWAPINTERVALEXTPROC glad_glXSwapIntervalEXT = NULL;
66 PFNGLXSWAPINTERVALMESAPROC glad_glXSwapIntervalMESA = NULL;
67 PFNGLXUSEXFONTPROC glad_glXUseXFont = NULL;
68 PFNGLXWAITGLPROC glad_glXWaitGL = NULL;
69 PFNGLXWAITXPROC glad_glXWaitX = NULL;
70 
71 
glad_glx_load_GLX_VERSION_1_0(GLADuserptrloadfunc load,void * userptr)72 static void glad_glx_load_GLX_VERSION_1_0( GLADuserptrloadfunc load, void* userptr) {
73     if(!GLAD_GLX_VERSION_1_0) return;
74     glad_glXChooseVisual = (PFNGLXCHOOSEVISUALPROC) load(userptr, "glXChooseVisual");
75     glad_glXCopyContext = (PFNGLXCOPYCONTEXTPROC) load(userptr, "glXCopyContext");
76     glad_glXCreateContext = (PFNGLXCREATECONTEXTPROC) load(userptr, "glXCreateContext");
77     glad_glXCreateGLXPixmap = (PFNGLXCREATEGLXPIXMAPPROC) load(userptr, "glXCreateGLXPixmap");
78     glad_glXDestroyContext = (PFNGLXDESTROYCONTEXTPROC) load(userptr, "glXDestroyContext");
79     glad_glXDestroyGLXPixmap = (PFNGLXDESTROYGLXPIXMAPPROC) load(userptr, "glXDestroyGLXPixmap");
80     glad_glXGetConfig = (PFNGLXGETCONFIGPROC) load(userptr, "glXGetConfig");
81     glad_glXGetCurrentContext = (PFNGLXGETCURRENTCONTEXTPROC) load(userptr, "glXGetCurrentContext");
82     glad_glXGetCurrentDrawable = (PFNGLXGETCURRENTDRAWABLEPROC) load(userptr, "glXGetCurrentDrawable");
83     glad_glXIsDirect = (PFNGLXISDIRECTPROC) load(userptr, "glXIsDirect");
84     glad_glXMakeCurrent = (PFNGLXMAKECURRENTPROC) load(userptr, "glXMakeCurrent");
85     glad_glXQueryExtension = (PFNGLXQUERYEXTENSIONPROC) load(userptr, "glXQueryExtension");
86     glad_glXQueryVersion = (PFNGLXQUERYVERSIONPROC) load(userptr, "glXQueryVersion");
87     glad_glXSwapBuffers = (PFNGLXSWAPBUFFERSPROC) load(userptr, "glXSwapBuffers");
88     glad_glXUseXFont = (PFNGLXUSEXFONTPROC) load(userptr, "glXUseXFont");
89     glad_glXWaitGL = (PFNGLXWAITGLPROC) load(userptr, "glXWaitGL");
90     glad_glXWaitX = (PFNGLXWAITXPROC) load(userptr, "glXWaitX");
91 }
glad_glx_load_GLX_VERSION_1_1(GLADuserptrloadfunc load,void * userptr)92 static void glad_glx_load_GLX_VERSION_1_1( GLADuserptrloadfunc load, void* userptr) {
93     if(!GLAD_GLX_VERSION_1_1) return;
94     glad_glXGetClientString = (PFNGLXGETCLIENTSTRINGPROC) load(userptr, "glXGetClientString");
95     glad_glXQueryExtensionsString = (PFNGLXQUERYEXTENSIONSSTRINGPROC) load(userptr, "glXQueryExtensionsString");
96     glad_glXQueryServerString = (PFNGLXQUERYSERVERSTRINGPROC) load(userptr, "glXQueryServerString");
97 }
glad_glx_load_GLX_VERSION_1_2(GLADuserptrloadfunc load,void * userptr)98 static void glad_glx_load_GLX_VERSION_1_2( GLADuserptrloadfunc load, void* userptr) {
99     if(!GLAD_GLX_VERSION_1_2) return;
100     glad_glXGetCurrentDisplay = (PFNGLXGETCURRENTDISPLAYPROC) load(userptr, "glXGetCurrentDisplay");
101 }
glad_glx_load_GLX_VERSION_1_3(GLADuserptrloadfunc load,void * userptr)102 static void glad_glx_load_GLX_VERSION_1_3( GLADuserptrloadfunc load, void* userptr) {
103     if(!GLAD_GLX_VERSION_1_3) return;
104     glad_glXChooseFBConfig = (PFNGLXCHOOSEFBCONFIGPROC) load(userptr, "glXChooseFBConfig");
105     glad_glXCreateNewContext = (PFNGLXCREATENEWCONTEXTPROC) load(userptr, "glXCreateNewContext");
106     glad_glXCreatePbuffer = (PFNGLXCREATEPBUFFERPROC) load(userptr, "glXCreatePbuffer");
107     glad_glXCreatePixmap = (PFNGLXCREATEPIXMAPPROC) load(userptr, "glXCreatePixmap");
108     glad_glXCreateWindow = (PFNGLXCREATEWINDOWPROC) load(userptr, "glXCreateWindow");
109     glad_glXDestroyPbuffer = (PFNGLXDESTROYPBUFFERPROC) load(userptr, "glXDestroyPbuffer");
110     glad_glXDestroyPixmap = (PFNGLXDESTROYPIXMAPPROC) load(userptr, "glXDestroyPixmap");
111     glad_glXDestroyWindow = (PFNGLXDESTROYWINDOWPROC) load(userptr, "glXDestroyWindow");
112     glad_glXGetCurrentReadDrawable = (PFNGLXGETCURRENTREADDRAWABLEPROC) load(userptr, "glXGetCurrentReadDrawable");
113     glad_glXGetFBConfigAttrib = (PFNGLXGETFBCONFIGATTRIBPROC) load(userptr, "glXGetFBConfigAttrib");
114     glad_glXGetFBConfigs = (PFNGLXGETFBCONFIGSPROC) load(userptr, "glXGetFBConfigs");
115     glad_glXGetSelectedEvent = (PFNGLXGETSELECTEDEVENTPROC) load(userptr, "glXGetSelectedEvent");
116     glad_glXGetVisualFromFBConfig = (PFNGLXGETVISUALFROMFBCONFIGPROC) load(userptr, "glXGetVisualFromFBConfig");
117     glad_glXMakeContextCurrent = (PFNGLXMAKECONTEXTCURRENTPROC) load(userptr, "glXMakeContextCurrent");
118     glad_glXQueryContext = (PFNGLXQUERYCONTEXTPROC) load(userptr, "glXQueryContext");
119     glad_glXQueryDrawable = (PFNGLXQUERYDRAWABLEPROC) load(userptr, "glXQueryDrawable");
120     glad_glXSelectEvent = (PFNGLXSELECTEVENTPROC) load(userptr, "glXSelectEvent");
121 }
glad_glx_load_GLX_VERSION_1_4(GLADuserptrloadfunc load,void * userptr)122 static void glad_glx_load_GLX_VERSION_1_4( GLADuserptrloadfunc load, void* userptr) {
123     if(!GLAD_GLX_VERSION_1_4) return;
124     glad_glXGetProcAddress = (PFNGLXGETPROCADDRESSPROC) load(userptr, "glXGetProcAddress");
125 }
glad_glx_load_GLX_EXT_swap_control(GLADuserptrloadfunc load,void * userptr)126 static void glad_glx_load_GLX_EXT_swap_control( GLADuserptrloadfunc load, void* userptr) {
127     if(!GLAD_GLX_EXT_swap_control) return;
128     glad_glXSwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC) load(userptr, "glXSwapIntervalEXT");
129 }
glad_glx_load_GLX_MESA_swap_control(GLADuserptrloadfunc load,void * userptr)130 static void glad_glx_load_GLX_MESA_swap_control( GLADuserptrloadfunc load, void* userptr) {
131     if(!GLAD_GLX_MESA_swap_control) return;
132     glad_glXGetSwapIntervalMESA = (PFNGLXGETSWAPINTERVALMESAPROC) load(userptr, "glXGetSwapIntervalMESA");
133     glad_glXSwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC) load(userptr, "glXSwapIntervalMESA");
134 }
135 
136 
137 
glad_glx_has_extension(Display * display,int screen,const char * ext)138 static int glad_glx_has_extension(Display *display, int screen, const char *ext) {
139 #ifndef GLX_VERSION_1_1
140     (void) display;
141     (void) screen;
142     (void) ext;
143 #else
144     const char *terminator;
145     const char *loc;
146     const char *extensions;
147 
148     if (glXQueryExtensionsString == NULL) {
149         return 0;
150     }
151 
152     extensions = glXQueryExtensionsString(display, screen);
153 
154     if(extensions == NULL || ext == NULL) {
155         return 0;
156     }
157 
158     while(1) {
159         loc = strstr(extensions, ext);
160         if(loc == NULL)
161             break;
162 
163         terminator = loc + strlen(ext);
164         if((loc == extensions || *(loc - 1) == ' ') &&
165             (*terminator == ' ' || *terminator == '\0')) {
166             return 1;
167         }
168         extensions = terminator;
169     }
170 #endif
171 
172     return 0;
173 }
174 
glad_glx_get_proc_from_userptr(void * userptr,const char * name)175 static GLADapiproc glad_glx_get_proc_from_userptr(void *userptr, const char* name) {
176     return (GLAD_GNUC_EXTENSION (GLADapiproc (*)(const char *name)) userptr)(name);
177 }
178 
glad_glx_find_extensions(Display * display,int screen)179 static int glad_glx_find_extensions(Display *display, int screen) {
180     GLAD_GLX_EXT_swap_control = glad_glx_has_extension(display, screen, "GLX_EXT_swap_control");
181     GLAD_GLX_MESA_swap_control = glad_glx_has_extension(display, screen, "GLX_MESA_swap_control");
182     return 1;
183 }
184 
glad_glx_find_core_glx(Display ** display,int * screen)185 static int glad_glx_find_core_glx(Display **display, int *screen) {
186     int major = 0, minor = 0;
187     if(*display == NULL) {
188 #ifdef GLAD_GLX_NO_X11
189         (void) screen;
190         return 0;
191 #else
192         *display = XOpenDisplay(0);
193         if (*display == NULL) {
194             return 0;
195         }
196         *screen = XScreenNumberOfScreen(XDefaultScreenOfDisplay(*display));
197 #endif
198     }
199     glXQueryVersion(*display, &major, &minor);
200     GLAD_GLX_VERSION_1_0 = (major == 1 && minor >= 0) || major > 1;
201     GLAD_GLX_VERSION_1_1 = (major == 1 && minor >= 1) || major > 1;
202     GLAD_GLX_VERSION_1_2 = (major == 1 && minor >= 2) || major > 1;
203     GLAD_GLX_VERSION_1_3 = (major == 1 && minor >= 3) || major > 1;
204     GLAD_GLX_VERSION_1_4 = (major == 1 && minor >= 4) || major > 1;
205     return GLAD_MAKE_VERSION(major, minor);
206 }
207 
gladLoadGLXUserPtr(Display * display,int screen,GLADuserptrloadfunc load,void * userptr)208 int gladLoadGLXUserPtr(Display *display, int screen, GLADuserptrloadfunc load, void *userptr) {
209     int version;
210     glXQueryVersion = (PFNGLXQUERYVERSIONPROC) load(userptr, "glXQueryVersion");
211     if(glXQueryVersion == NULL) return 0;
212     version = glad_glx_find_core_glx(&display, &screen);
213 
214     glad_glx_load_GLX_VERSION_1_0(load, userptr);
215     glad_glx_load_GLX_VERSION_1_1(load, userptr);
216     glad_glx_load_GLX_VERSION_1_2(load, userptr);
217     glad_glx_load_GLX_VERSION_1_3(load, userptr);
218     glad_glx_load_GLX_VERSION_1_4(load, userptr);
219 
220     if (!glad_glx_find_extensions(display, screen)) return 0;
221     glad_glx_load_GLX_EXT_swap_control(load, userptr);
222     glad_glx_load_GLX_MESA_swap_control(load, userptr);
223 
224     return version;
225 }
226 
gladLoadGLX(Display * display,int screen,GLADloadfunc load)227 int gladLoadGLX(Display *display, int screen, GLADloadfunc load) {
228     return gladLoadGLXUserPtr(display, screen, glad_glx_get_proc_from_userptr, GLAD_GNUC_EXTENSION (void*) load);
229 }
230 
231 
232 
233