fix: add debug capabilities for gl and egl

.gitignore

@@ -28,3 +28,4 @@ conftest.*
 error.glsl
 draft/
 *.gch
+*.out

Makefile.dev

@@ -22,6 +22,7 @@ build:
 		-DGLFW_NATIVE_INCLUDE_NONE \
 		-DLOG_USE_COLOR \
 		-DVIDEO_IN \
+		-DEGL_DEBUG \
 		-o build/$(TARGET) \
 		-g -Og
 

compile_flags.txt

@@ -2,4 +2,6 @@
 -DGLFW_INCLUDE_NONE
 -DGLFW_EXPOSE_NATIVE_EGL
 -DGLFW_NATIVE_INCLUDE_NONE
--DVIDEO_IN
+-DVIDEO_IN
+-DEGL_DEBUG
+-DGL_DEBUG

include/glad/egl.h

@@ -1,11 +1,11 @@
 /**
- * Loader generated by glad 2.0.8 on Sun Sep 21 11:51:45 2025
+ * Loader generated by glad 2.0.8 on Wed May 13 21:51:29 2026
  *
  * SPDX-License-Identifier: (WTFPL OR CC0-1.0) AND Apache-2.0
  *
  * Generator: C/C++
  * Specification: egl
- * Extensions: 10
+ * Extensions: 11
  *
  * APIs:
  *  - egl=1.5
@@ -19,10 +19,10 @@
  *  - ON_DEMAND = False
  *
  * Commandline:
- *    --api='egl=1.5' --extensions='EGL_EXT_image_dma_buf_import,EGL_EXT_image_dma_buf_import_modifiers,EGL_KHR_gl_texture_2D_image,EGL_KHR_image,EGL_KHR_image_base,EGL_KHR_platform_android,EGL_KHR_platform_gbm,EGL_KHR_platform_wayland,EGL_KHR_platform_x11,EGL_MESA_drm_image' c --header-only --loader
+ *    --api='egl=1.5' --extensions='EGL_EXT_image_dma_buf_import,EGL_EXT_image_dma_buf_import_modifiers,EGL_KHR_debug,EGL_KHR_gl_texture_2D_image,EGL_KHR_image,EGL_KHR_image_base,EGL_KHR_platform_android,EGL_KHR_platform_gbm,EGL_KHR_platform_wayland,EGL_KHR_platform_x11,EGL_MESA_drm_image' c --header-only --loader
  *
  * Online:
- *    http://glad.sh/#api=egl%3D1.5&extensions=EGL_EXT_image_dma_buf_import%2CEGL_EXT_image_dma_buf_import_modifiers%2CEGL_KHR_gl_texture_2D_image%2CEGL_KHR_image%2CEGL_KHR_image_base%2CEGL_KHR_platform_android%2CEGL_KHR_platform_gbm%2CEGL_KHR_platform_wayland%2CEGL_KHR_platform_x11%2CEGL_MESA_drm_image&generator=c&options=HEADER_ONLY%2CLOADER
+ *    http://glad.sh/#api=egl%3D1.5&extensions=EGL_EXT_image_dma_buf_import%2CEGL_EXT_image_dma_buf_import_modifiers%2CEGL_KHR_debug%2CEGL_KHR_gl_texture_2D_image%2CEGL_KHR_image%2CEGL_KHR_image_base%2CEGL_KHR_platform_android%2CEGL_KHR_platform_gbm%2CEGL_KHR_platform_wayland%2CEGL_KHR_platform_x11%2CEGL_MESA_drm_image&generator=c&options=HEADER_ONLY%2CLOADER
  *
  */
 
@@ -201,6 +201,11 @@ typedef void (*GLADpostcallback)(void *ret, const char *name, GLADapiproc apipro
 #define EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY 0x31BD
 #define EGL_CONTEXT_OPENGL_ROBUST_ACCESS 0x31B2
 #define EGL_CORE_NATIVE_ENGINE 0x305B
+#define EGL_DEBUG_CALLBACK_KHR 0x33B8
+#define EGL_DEBUG_MSG_CRITICAL_KHR 0x33B9
+#define EGL_DEBUG_MSG_ERROR_KHR 0x33BA
+#define EGL_DEBUG_MSG_INFO_KHR 0x33BC
+#define EGL_DEBUG_MSG_WARN_KHR 0x33BB
 #define EGL_DEFAULT_DISPLAY EGL_CAST(EGLNativeDisplayType,0)
 #define EGL_DEPTH_SIZE 0x3025
 #define EGL_DISPLAY_SCALING 10000
@@ -295,6 +300,13 @@ typedef void (*GLADpostcallback)(void *ret, const char *name, GLADapiproc apipro
 #define EGL_NO_SURFACE EGL_CAST(EGLSurface,0)
 #define EGL_NO_SYNC EGL_CAST(EGLSync,0)
 #define EGL_NO_TEXTURE 0x305C
+#define EGL_OBJECT_CONTEXT_KHR 0x33B2
+#define EGL_OBJECT_DISPLAY_KHR 0x33B1
+#define EGL_OBJECT_IMAGE_KHR 0x33B4
+#define EGL_OBJECT_STREAM_KHR 0x33B6
+#define EGL_OBJECT_SURFACE_KHR 0x33B3
+#define EGL_OBJECT_SYNC_KHR 0x33B5
+#define EGL_OBJECT_THREAD_KHR 0x33B0
 #define EGL_OPENGL_API 0x30A2
 #define EGL_OPENGL_BIT 0x0008
 #define EGL_OPENGL_ES2_BIT 0x0004
@@ -934,6 +946,8 @@ GLAD_API_CALL int GLAD_EGL_VERSION_1_5;
 GLAD_API_CALL int GLAD_EGL_EXT_image_dma_buf_import;
 #define EGL_EXT_image_dma_buf_import_modifiers 1
 GLAD_API_CALL int GLAD_EGL_EXT_image_dma_buf_import_modifiers;
+#define EGL_KHR_debug 1
+GLAD_API_CALL int GLAD_EGL_KHR_debug;
 #define EGL_KHR_gl_texture_2D_image 1
 GLAD_API_CALL int GLAD_EGL_KHR_gl_texture_2D_image;
 #define EGL_KHR_image 1
@@ -968,6 +982,7 @@ typedef EGLSurface (GLAD_API_PTR *PFNEGLCREATEPLATFORMPIXMAPSURFACEPROC)(EGLDisp
 typedef EGLSurface (GLAD_API_PTR *PFNEGLCREATEPLATFORMWINDOWSURFACEPROC)(EGLDisplay dpy, EGLConfig config, void * native_window, const EGLAttrib * attrib_list);
 typedef EGLSync (GLAD_API_PTR *PFNEGLCREATESYNCPROC)(EGLDisplay dpy, EGLenum type, const EGLAttrib * attrib_list);
 typedef EGLSurface (GLAD_API_PTR *PFNEGLCREATEWINDOWSURFACEPROC)(EGLDisplay dpy, EGLConfig config, EGLNativeWindowType win, const EGLint * attrib_list);
+typedef EGLint (GLAD_API_PTR *PFNEGLDEBUGMESSAGECONTROLKHRPROC)(EGLDEBUGPROCKHR callback, const EGLAttrib * attrib_list);
 typedef EGLBoolean (GLAD_API_PTR *PFNEGLDESTROYCONTEXTPROC)(EGLDisplay dpy, EGLContext ctx);
 typedef EGLBoolean (GLAD_API_PTR *PFNEGLDESTROYIMAGEPROC)(EGLDisplay dpy, EGLImage image);
 typedef EGLBoolean (GLAD_API_PTR *PFNEGLDESTROYIMAGEKHRPROC)(EGLDisplay dpy, EGLImageKHR image);
@@ -985,9 +1000,11 @@ typedef EGLDisplay (GLAD_API_PTR *PFNEGLGETPLATFORMDISPLAYPROC)(EGLenum platform
 typedef __eglMustCastToProperFunctionPointerType (GLAD_API_PTR *PFNEGLGETPROCADDRESSPROC)(const char * procname);
 typedef EGLBoolean (GLAD_API_PTR *PFNEGLGETSYNCATTRIBPROC)(EGLDisplay dpy, EGLSync sync, EGLint attribute, EGLAttrib * value);
 typedef EGLBoolean (GLAD_API_PTR *PFNEGLINITIALIZEPROC)(EGLDisplay dpy, EGLint * major, EGLint * minor);
+typedef EGLint (GLAD_API_PTR *PFNEGLLABELOBJECTKHRPROC)(EGLDisplay display, EGLenum objectType, EGLObjectKHR object, EGLLabelKHR label);
 typedef EGLBoolean (GLAD_API_PTR *PFNEGLMAKECURRENTPROC)(EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx);
 typedef EGLenum (GLAD_API_PTR *PFNEGLQUERYAPIPROC)(void);
 typedef EGLBoolean (GLAD_API_PTR *PFNEGLQUERYCONTEXTPROC)(EGLDisplay dpy, EGLContext ctx, EGLint attribute, EGLint * value);
+typedef EGLBoolean (GLAD_API_PTR *PFNEGLQUERYDEBUGKHRPROC)(EGLint attribute, EGLAttrib * value);
 typedef EGLBoolean (GLAD_API_PTR *PFNEGLQUERYDMABUFFORMATSEXTPROC)(EGLDisplay dpy, EGLint max_formats, EGLint * formats, EGLint * num_formats);
 typedef EGLBoolean (GLAD_API_PTR *PFNEGLQUERYDMABUFMODIFIERSEXTPROC)(EGLDisplay dpy, EGLint format, EGLint max_modifiers, EGLuint64KHR * modifiers, EGLBoolean * external_only, EGLint * num_modifiers);
 typedef const char * (GLAD_API_PTR *PFNEGLQUERYSTRINGPROC)(EGLDisplay dpy, EGLint name);
@@ -1035,6 +1052,8 @@ GLAD_API_CALL PFNEGLCREATESYNCPROC glad_eglCreateSync;
 #define eglCreateSync glad_eglCreateSync
 GLAD_API_CALL PFNEGLCREATEWINDOWSURFACEPROC glad_eglCreateWindowSurface;
 #define eglCreateWindowSurface glad_eglCreateWindowSurface
+GLAD_API_CALL PFNEGLDEBUGMESSAGECONTROLKHRPROC glad_eglDebugMessageControlKHR;
+#define eglDebugMessageControlKHR glad_eglDebugMessageControlKHR
 GLAD_API_CALL PFNEGLDESTROYCONTEXTPROC glad_eglDestroyContext;
 #define eglDestroyContext glad_eglDestroyContext
 GLAD_API_CALL PFNEGLDESTROYIMAGEPROC glad_eglDestroyImage;
@@ -1069,12 +1088,16 @@ GLAD_API_CALL PFNEGLGETSYNCATTRIBPROC glad_eglGetSyncAttrib;
 #define eglGetSyncAttrib glad_eglGetSyncAttrib
 GLAD_API_CALL PFNEGLINITIALIZEPROC glad_eglInitialize;
 #define eglInitialize glad_eglInitialize
+GLAD_API_CALL PFNEGLLABELOBJECTKHRPROC glad_eglLabelObjectKHR;
+#define eglLabelObjectKHR glad_eglLabelObjectKHR
 GLAD_API_CALL PFNEGLMAKECURRENTPROC glad_eglMakeCurrent;
 #define eglMakeCurrent glad_eglMakeCurrent
 GLAD_API_CALL PFNEGLQUERYAPIPROC glad_eglQueryAPI;
 #define eglQueryAPI glad_eglQueryAPI
 GLAD_API_CALL PFNEGLQUERYCONTEXTPROC glad_eglQueryContext;
 #define eglQueryContext glad_eglQueryContext
+GLAD_API_CALL PFNEGLQUERYDEBUGKHRPROC glad_eglQueryDebugKHR;
+#define eglQueryDebugKHR glad_eglQueryDebugKHR
 GLAD_API_CALL PFNEGLQUERYDMABUFFORMATSEXTPROC glad_eglQueryDmaBufFormatsEXT;
 #define eglQueryDmaBufFormatsEXT glad_eglQueryDmaBufFormatsEXT
 GLAD_API_CALL PFNEGLQUERYDMABUFMODIFIERSEXTPROC glad_eglQueryDmaBufModifiersEXT;
@@ -1157,6 +1180,7 @@ int GLAD_EGL_VERSION_1_4 = 0;
 int GLAD_EGL_VERSION_1_5 = 0;
 int GLAD_EGL_EXT_image_dma_buf_import = 0;
 int GLAD_EGL_EXT_image_dma_buf_import_modifiers = 0;
+int GLAD_EGL_KHR_debug = 0;
 int GLAD_EGL_KHR_gl_texture_2D_image = 0;
 int GLAD_EGL_KHR_image = 0;
 int GLAD_EGL_KHR_image_base = 0;
@@ -1184,6 +1208,7 @@ PFNEGLCREATEPLATFORMPIXMAPSURFACEPROC glad_eglCreatePlatformPixmapSurface = NULL
 PFNEGLCREATEPLATFORMWINDOWSURFACEPROC glad_eglCreatePlatformWindowSurface = NULL;
 PFNEGLCREATESYNCPROC glad_eglCreateSync = NULL;
 PFNEGLCREATEWINDOWSURFACEPROC glad_eglCreateWindowSurface = NULL;
+PFNEGLDEBUGMESSAGECONTROLKHRPROC glad_eglDebugMessageControlKHR = NULL;
 PFNEGLDESTROYCONTEXTPROC glad_eglDestroyContext = NULL;
 PFNEGLDESTROYIMAGEPROC glad_eglDestroyImage = NULL;
 PFNEGLDESTROYIMAGEKHRPROC glad_eglDestroyImageKHR = NULL;
@@ -1201,9 +1226,11 @@ PFNEGLGETPLATFORMDISPLAYPROC glad_eglGetPlatformDisplay = NULL;
 PFNEGLGETPROCADDRESSPROC glad_eglGetProcAddress = NULL;
 PFNEGLGETSYNCATTRIBPROC glad_eglGetSyncAttrib = NULL;
 PFNEGLINITIALIZEPROC glad_eglInitialize = NULL;
+PFNEGLLABELOBJECTKHRPROC glad_eglLabelObjectKHR = NULL;
 PFNEGLMAKECURRENTPROC glad_eglMakeCurrent = NULL;
 PFNEGLQUERYAPIPROC glad_eglQueryAPI = NULL;
 PFNEGLQUERYCONTEXTPROC glad_eglQueryContext = NULL;
+PFNEGLQUERYDEBUGKHRPROC glad_eglQueryDebugKHR = NULL;
 PFNEGLQUERYDMABUFFORMATSEXTPROC glad_eglQueryDmaBufFormatsEXT = NULL;
 PFNEGLQUERYDMABUFMODIFIERSEXTPROC glad_eglQueryDmaBufModifiersEXT = NULL;
 PFNEGLQUERYSTRINGPROC glad_eglQueryString = NULL;
@@ -1284,6 +1311,12 @@ static void glad_egl_load_EGL_EXT_image_dma_buf_import_modifiers( GLADuserptrloa
     glad_eglQueryDmaBufFormatsEXT = (PFNEGLQUERYDMABUFFORMATSEXTPROC) load(userptr, "eglQueryDmaBufFormatsEXT");
     glad_eglQueryDmaBufModifiersEXT = (PFNEGLQUERYDMABUFMODIFIERSEXTPROC) load(userptr, "eglQueryDmaBufModifiersEXT");
 }
+static void glad_egl_load_EGL_KHR_debug( GLADuserptrloadfunc load, void* userptr) {
+    if(!GLAD_EGL_KHR_debug) return;
+    glad_eglDebugMessageControlKHR = (PFNEGLDEBUGMESSAGECONTROLKHRPROC) load(userptr, "eglDebugMessageControlKHR");
+    glad_eglLabelObjectKHR = (PFNEGLLABELOBJECTKHRPROC) load(userptr, "eglLabelObjectKHR");
+    glad_eglQueryDebugKHR = (PFNEGLQUERYDEBUGKHRPROC) load(userptr, "eglQueryDebugKHR");
+}
 static void glad_egl_load_EGL_KHR_image( GLADuserptrloadfunc load, void* userptr) {
     if(!GLAD_EGL_KHR_image) return;
     glad_eglCreateImageKHR = (PFNEGLCREATEIMAGEKHRPROC) load(userptr, "eglCreateImageKHR");
@@ -1338,6 +1371,7 @@ static int glad_egl_find_extensions_egl(EGLDisplay display) {
 
     GLAD_EGL_EXT_image_dma_buf_import = glad_egl_has_extension(extensions, "EGL_EXT_image_dma_buf_import");
     GLAD_EGL_EXT_image_dma_buf_import_modifiers = glad_egl_has_extension(extensions, "EGL_EXT_image_dma_buf_import_modifiers");
+    GLAD_EGL_KHR_debug = glad_egl_has_extension(extensions, "EGL_KHR_debug");
     GLAD_EGL_KHR_gl_texture_2D_image = glad_egl_has_extension(extensions, "EGL_KHR_gl_texture_2D_image");
     GLAD_EGL_KHR_image = glad_egl_has_extension(extensions, "EGL_KHR_image");
     GLAD_EGL_KHR_image_base = glad_egl_has_extension(extensions, "EGL_KHR_image_base");
@@ -1409,6 +1443,7 @@ int gladLoadEGLUserPtr(EGLDisplay display, GLADuserptrloadfunc load, void* userp
 
     if (!glad_egl_find_extensions_egl(display)) return 0;
     glad_egl_load_EGL_EXT_image_dma_buf_import_modifiers(load, userptr);
+    glad_egl_load_EGL_KHR_debug(load, userptr);
     glad_egl_load_EGL_KHR_image(load, userptr);
     glad_egl_load_EGL_KHR_image_base(load, userptr);
     glad_egl_load_EGL_MESA_drm_image(load, userptr);
@@ -1421,7 +1456,7 @@ int gladLoadEGL(EGLDisplay display, GLADloadfunc load) {
     return gladLoadEGLUserPtr(display, glad_egl_get_proc_from_userptr, GLAD_GNUC_EXTENSION (void*) load);
 }
 
- 
+
 
 #ifdef GLAD_EGL
 
@@ -1572,4 +1607,3 @@ void gladLoaderUnloadEGL(void) {
 #endif
 
 #endif /* GLAD_EGL_IMPLEMENTATION */
-

include/glad/gl.h

@@ -1,11 +1,11 @@
 /**
- * Loader generated by glad 2.0.8 on Sun Sep 21 13:34:57 2025
+ * Loader generated by glad 2.0.8 on Wed May 13 21:57:23 2026
  *
  * SPDX-License-Identifier: (WTFPL OR CC0-1.0) AND Apache-2.0
  *
  * Generator: C/C++
  * Specification: gl
- * Extensions: 3
+ * Extensions: 4
  *
  * APIs:
  *  - gl:compatibility=4.6
@@ -19,10 +19,10 @@
  *  - ON_DEMAND = False
  *
  * Commandline:
- *    --api='gl:compatibility=4.6' --extensions='GL_ARB_direct_state_access,GL_EXT_EGL_image_storage,GL_EXT_direct_state_access' c --header-only --loader
+ *    --api='gl:compatibility=4.6' --extensions='GL_ARB_direct_state_access,GL_EXT_EGL_image_storage,GL_EXT_direct_state_access,GL_KHR_debug' c --header-only --loader
  *
  * Online:
- *    http://glad.sh/#api=gl%3Acompatibility%3D4.6&extensions=GL_ARB_direct_state_access%2CGL_EXT_EGL_image_storage%2CGL_EXT_direct_state_access&generator=c&options=HEADER_ONLY%2CLOADER
+ *    http://glad.sh/#api=gl%3Acompatibility%3D4.6&extensions=GL_ARB_direct_state_access%2CGL_EXT_EGL_image_storage%2CGL_EXT_direct_state_access%2CGL_KHR_debug&generator=c&options=HEADER_ONLY%2CLOADER
  *
  */
 
@@ -2409,6 +2409,8 @@ GLAD_API_CALL int GLAD_GL_ARB_direct_state_access;
 GLAD_API_CALL int GLAD_GL_EXT_EGL_image_storage;
 #define GL_EXT_direct_state_access 1
 GLAD_API_CALL int GLAD_GL_EXT_direct_state_access;
+#define GL_KHR_debug 1
+GLAD_API_CALL int GLAD_GL_KHR_debug;
 
 
 typedef void (GLAD_API_PTR *PFNGLACCUMPROC)(GLenum op, GLfloat value);
@@ -6396,6 +6398,7 @@ int GLAD_GL_VERSION_4_6 = 0;
 int GLAD_GL_ARB_direct_state_access = 0;
 int GLAD_GL_EXT_EGL_image_storage = 0;
 int GLAD_GL_EXT_direct_state_access = 0;
+int GLAD_GL_KHR_debug = 0;
 
 
 
@@ -9178,6 +9181,20 @@ static void glad_gl_load_GL_EXT_direct_state_access( GLADuserptrloadfunc load, v
     glad_glVertexArrayVertexBindingDivisorEXT = (PFNGLVERTEXARRAYVERTEXBINDINGDIVISOREXTPROC) load(userptr, "glVertexArrayVertexBindingDivisorEXT");
     glad_glVertexArrayVertexOffsetEXT = (PFNGLVERTEXARRAYVERTEXOFFSETEXTPROC) load(userptr, "glVertexArrayVertexOffsetEXT");
 }
+static void glad_gl_load_GL_KHR_debug( GLADuserptrloadfunc load, void* userptr) {
+    if(!GLAD_GL_KHR_debug) return;
+    glad_glDebugMessageCallback = (PFNGLDEBUGMESSAGECALLBACKPROC) load(userptr, "glDebugMessageCallback");
+    glad_glDebugMessageControl = (PFNGLDEBUGMESSAGECONTROLPROC) load(userptr, "glDebugMessageControl");
+    glad_glDebugMessageInsert = (PFNGLDEBUGMESSAGEINSERTPROC) load(userptr, "glDebugMessageInsert");
+    glad_glGetDebugMessageLog = (PFNGLGETDEBUGMESSAGELOGPROC) load(userptr, "glGetDebugMessageLog");
+    glad_glGetObjectLabel = (PFNGLGETOBJECTLABELPROC) load(userptr, "glGetObjectLabel");
+    glad_glGetObjectPtrLabel = (PFNGLGETOBJECTPTRLABELPROC) load(userptr, "glGetObjectPtrLabel");
+    glad_glGetPointerv = (PFNGLGETPOINTERVPROC) load(userptr, "glGetPointerv");
+    glad_glObjectLabel = (PFNGLOBJECTLABELPROC) load(userptr, "glObjectLabel");
+    glad_glObjectPtrLabel = (PFNGLOBJECTPTRLABELPROC) load(userptr, "glObjectPtrLabel");
+    glad_glPopDebugGroup = (PFNGLPOPDEBUGGROUPPROC) load(userptr, "glPopDebugGroup");
+    glad_glPushDebugGroup = (PFNGLPUSHDEBUGGROUPPROC) load(userptr, "glPushDebugGroup");
+}
 
 
 
@@ -9276,6 +9293,7 @@ static int glad_gl_find_extensions_gl(void) {
     GLAD_GL_ARB_direct_state_access = glad_gl_has_extension(exts, exts_i, "GL_ARB_direct_state_access");
     GLAD_GL_EXT_EGL_image_storage = glad_gl_has_extension(exts, exts_i, "GL_EXT_EGL_image_storage");
     GLAD_GL_EXT_direct_state_access = glad_gl_has_extension(exts, exts_i, "GL_EXT_direct_state_access");
+    GLAD_GL_KHR_debug = glad_gl_has_extension(exts, exts_i, "GL_KHR_debug");
 
     glad_gl_free_extensions(exts_i);
 
@@ -9360,6 +9378,7 @@ int gladLoadGLUserPtr( GLADuserptrloadfunc load, void *userptr) {
     glad_gl_load_GL_ARB_direct_state_access(load, userptr);
     glad_gl_load_GL_EXT_EGL_image_storage(load, userptr);
     glad_gl_load_GL_EXT_direct_state_access(load, userptr);
+    glad_gl_load_GL_KHR_debug(load, userptr);
 
 
 
@@ -9373,7 +9392,7 @@ int gladLoadGL( GLADloadfunc load) {
 
 
 
- 
+
 
 #ifdef GLAD_GL
 
@@ -9482,7 +9501,9 @@ static void* glad_gl_dlopen_handle(void) {
         "libGL-1.so",
   #endif
         "libGL.so.1",
-        "libGL.so"
+        "libGL.so",
+        "libEGL.so.1",
+        "libEGL.so"
     };
 #endif
 
@@ -9505,6 +9526,9 @@ static struct _glad_gl_userptr glad_gl_build_userptr(void *handle) {
 #else
     userptr.gl_get_proc_address_ptr =
         (GLADglprocaddrfunc) glad_dlsym_handle(handle, "glXGetProcAddressARB");
+    if (!userptr.gl_get_proc_address_ptr)
+        userptr.gl_get_proc_address_ptr =
+            (GLADglprocaddrfunc) glad_dlsym_handle(handle, "eglGetProcAddress");
 #endif
 
     return userptr;
@@ -9547,4 +9571,3 @@ void gladLoaderUnloadGL(void) {
 #endif
 
 #endif /* GLAD_GL_IMPLEMENTATION */
-

src/shaders.c

@@ -26,7 +26,7 @@
 
 static const GLuint unused_uniform = (GLuint)-1;
 
-bool check_glerror_ro(const char *context) {
+static bool check_glerror_ro(const char *context) {
   unsigned int code;
 
   code = glGetError();
@@ -39,7 +39,7 @@ bool check_glerror_ro(const char *context) {
   return false;
 }
 
-bool check_glerror(ShaderProgram *program, const char *context) {
+static bool check_glerror(ShaderProgram *program, const char *context) {
   if (check_glerror_ro(context)) {
     program->error = true;
     return true;
@@ -47,7 +47,20 @@ bool check_glerror(ShaderProgram *program, const char *context) {
   return false;
 }
 
-bool check_eglerror_ro(const char *context) {
+#ifdef GL_DEBUG
+
+static void gl_debug_callback(GLenum source, GLenum type, GLuint id,
+                              GLenum severity,
+                              __attribute__((unused)) GLsizei length,
+                              const GLchar *message,
+                              __attribute__((unused)) const void *userParam) {
+  log_debug("GL Debug: source=%x, type=%x, id=%d, severity=%x, message=%s",
+            source, type, id, severity, message ? message : "(null)");
+}
+
+#endif /* GL_DEBUG */
+
+static bool check_eglerror_ro(const char *context) {
 #ifdef VIDEO_IN
   unsigned int code;
 
@@ -61,7 +74,7 @@ bool check_eglerror_ro(const char *context) {
   return false;
 }
 
-bool check_eglerror(ShaderProgram *program, const char *context) {
+static bool check_eglerror(ShaderProgram *program, const char *context) {
   if (check_eglerror_ro(context)) {
     program->error = true;
     return true;
@@ -69,9 +82,29 @@ bool check_eglerror(ShaderProgram *program, const char *context) {
   return false;
 }
 
+#ifdef VIDEO_IN
+#ifdef EGL_DEBUG
+
+static void egl_debug_callback(EGLenum error, const char *command,
+                               EGLint messageType, EGLLabelKHR threadLabel,
+                               EGLLabelKHR objectLabel, const char *message) {
+  log_debug("EGL Debug: error=%04x, command=%s, type=%d, "
+            "thread=%p, object=%p, message=%s",
+            error, command ? command : "(null)", messageType, threadLabel,
+            objectLabel, message ? message : "(null)");
+}
+
+#endif /* EGL_DEBUG */
+#endif /* VIDEO_IN */
+
 static bool init_gl(ShaderProgram *program) {
   gladLoadGL(glfwGetProcAddress);
 
+#ifdef GL_DEBUG
+  glEnable(GL_DEBUG_OUTPUT);
+  glDebugMessageCallback(gl_debug_callback, NULL);
+#endif /* GL_DEBUG */
+
 #ifdef VIDEO_IN
   program->egl_display = glfwGetEGLDisplay();
   if (program->egl_display == EGL_NO_DISPLAY) {
@@ -81,6 +114,20 @@ static bool init_gl(ShaderProgram *program) {
   }
 
   gladLoadEGL(program->egl_display, glfwGetProcAddress);
+
+#ifdef EGL_DEBUG
+  {
+    PFNEGLDEBUGMESSAGECONTROLKHRPROC debug_ctrl =
+        (PFNEGLDEBUGMESSAGECONTROLKHRPROC)glfwGetProcAddress(
+            "eglDebugMessageControlKHR");
+    if (debug_ctrl != NULL) {
+      const EGLAttrib attrib_list[] = {EGL_NONE};
+      debug_ctrl(egl_debug_callback, attrib_list);
+    }
+  }
+
+#endif /* EGL_DEBUG */
+
 #endif /* VIDEO_IN */
 
   return !check_glerror(program, "init_gl") &&

src/window.c

@@ -59,6 +59,9 @@ create_window(GLFWmonitor *monitor, const char *title, Window *shared_context,
   // Context related hints
   glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
   glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
+#ifdef GL_DEBUG
+  glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, GLFW_TRUE);
+#endif
   glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
   // create fullscreen window in selected monitor