better logging and OpenGL ARB_debug_output

[laserbrain_demo] / src / opengl.c

diff --git a/src/opengl.c b/src/opengl.c
new file mode 100644 (file)
index 0000000..9fe7ea3
--- /dev/null
+++ b/src/opengl.c
@@ -0,0 +1,104 @@
+#include "opengl.h"
+#include "logger.h"
+
+static void gldebug_logger(unsigned int src, unsigned int type, unsigned int id,
+               unsigned int severity, int 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 gldebug_logger(unsigned int src, unsigned int type, unsigned int id,
+               unsigned int severity, int 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";
+}