--- /dev/null
+#include "opengl.h"
+#include "logger.h"
+
+
+static void GLAPIENTRY gldebug_logger(GLenum src, GLenum type, GLuint id, GLenum severity,
+ GLsizei len, const char *msg, const void *cls);
+
+static const char *gldebug_srcstr(unsigned int src);
+static const char *gldebug_typestr(unsigned int type);
+static const char *gldebug_sevstr(unsigned int sev);
+
+struct GLCaps glcaps;
+
+int init_opengl(void)
+{
+ glewInit();
+
+ glcaps.debug = GLEW_ARB_debug_output;
+
+#ifndef NDEBUG
+ if(glcaps.debug) {
+ info_log("Installing OpenGL debug callback\n");
+ glDebugMessageCallback(gldebug_logger, 0);
+ }
+#endif
+
+ return 0;
+}
+
+
+static void GLAPIENTRY gldebug_logger(GLenum src, GLenum type, GLuint id, GLenum severity,
+ GLsizei len, const char *msg, const void *cls)
+{
+ static const char *fmt = "[GLDEBUG] (%s) %s: %s\n";
+ switch(type) {
+ case GL_DEBUG_TYPE_ERROR:
+ error_log(fmt, gldebug_srcstr(src), gldebug_typestr(type), msg);
+ break;
+
+ case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR:
+ case GL_DEBUG_TYPE_PORTABILITY:
+ case GL_DEBUG_TYPE_PERFORMANCE:
+ warning_log(fmt, gldebug_srcstr(src), gldebug_typestr(type), msg);
+ break;
+
+ default:
+ debug_log(fmt, gldebug_srcstr(src), gldebug_typestr(type), msg);
+ }
+}
+
+static const char *gldebug_srcstr(unsigned int src)
+{
+ switch(src) {
+ case GL_DEBUG_SOURCE_API:
+ return "api";
+ case GL_DEBUG_SOURCE_WINDOW_SYSTEM:
+ return "wsys";
+ case GL_DEBUG_SOURCE_SHADER_COMPILER:
+ return "sdrc";
+ case GL_DEBUG_SOURCE_THIRD_PARTY:
+ return "3rdparty";
+ case GL_DEBUG_SOURCE_APPLICATION:
+ return "app";
+ case GL_DEBUG_SOURCE_OTHER:
+ return "other";
+ default:
+ break;
+ }
+ return "unknown";
+}
+
+static const char *gldebug_typestr(unsigned int type)
+{
+ switch(type) {
+ case GL_DEBUG_TYPE_ERROR:
+ return "error";
+ case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR:
+ return "deprecated";
+ case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR:
+ return "undefined behavior";
+ case GL_DEBUG_TYPE_PORTABILITY:
+ return "portability warning";
+ case GL_DEBUG_TYPE_PERFORMANCE:
+ return "performance warning";
+ case GL_DEBUG_TYPE_OTHER:
+ return "other";
+ default:
+ break;
+ }
+ return "unknown";
+}
+
+static const char *gldebug_sevstr(unsigned int sev)
+{
+ switch(sev) {
+ case GL_DEBUG_SEVERITY_HIGH:
+ return "high";
+ case GL_DEBUG_SEVERITY_MEDIUM:
+ return "medium";
+ case GL_DEBUG_SEVERITY_LOW:
+ return "low";
+ default:
+ break;
+ }
+ return "unknown";
+}