--- /dev/null
+/**
+ * Logging facility for debug/info messages.
+ */
+
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "egllog.h"
+
+#define MAXSTRING 1000
+
+
+/* XXX init this with an env var or something */
+static EGLint ReportingLevel = _EGL_DEBUG;
+
+
+/**
+ * Log a message to stderr.
+ * \param level one of _EGL_FATAL, _EGL_WARNING, _EGL_INFO, _EGL_DEBUG.
+ */
+void
+_eglLog(EGLint level, const char *fmtStr, ...)
+{
+ va_list args;
+ char msg[MAXSTRING];
+ const char *levelStr;
+
+ if (level <= ReportingLevel) {
+ switch (level) {
+ case _EGL_FATAL:
+ levelStr = "Fatal";
+ break;
+ case _EGL_WARNING:
+ levelStr = "Warning";
+ break;
+ case _EGL_INFO:
+ levelStr = "Info";
+ break;
+ case _EGL_DEBUG:
+ levelStr = "Debug";
+ break;
+ default:
+ levelStr = "";
+ }
+
+ va_start(args, fmtStr);
+ vsnprintf(msg, MAXSTRING, fmtStr, args);
+ va_end(args);
+
+ fprintf(stderr, "EGL %s: %s\n", levelStr, msg);
+
+ if (level == _EGL_FATAL) {
+ exit(1); /* or abort()? */
+ }
+ }
+}
--- /dev/null
+#ifndef EGLLOG_INCLUDED
+#define EGLLOG_INCLUDED
+
+#include "egltypedefs.h"
+
+#define _EGL_FATAL 0 /* unrecoverable error */
+#define _EGL_WARNING 1 /* recoverable error/problem */
+#define _EGL_INFO 2 /* just useful info */
+#define _EGL_DEBUG 3 /* useful info for debugging */
+
+
+extern void
+_eglLog(EGLint level, const char *fmtStr, ...);
+
+
+#endif /* EGLLOG_INCLUDED */