- moved most of the OpenGL backend to 'common'.

A few things are yet to do, because they still need some changes.

src/common/rendering/gl/gl_debug.h

@@ -0,0 +1,44 @@
+#ifndef __GL_DEBUG_H
+#define __GL_DEBUG_H
+
+#include <string.h>
+#include "gl_interface.h"
+#include "c_cvars.h"
+#include "v_video.h"
+
+namespace OpenGLRenderer
+{
+
+class FGLDebug
+{
+public:
+	void Update();
+
+	static void LabelObject(GLenum type, GLuint handle, const char *name);
+	static void LabelObjectPtr(void *ptr, const char *name);
+
+	static void PushGroup(const FString &name);
+	static void PopGroup();
+
+	static bool HasDebugApi() { return (gl.flags & RFL_DEBUG) != 0; }
+
+private:
+	void SetupBreakpointMode();
+	void UpdateLoggingLevel();
+	void OutputMessageLog();
+
+	static bool IsFilteredByDebugLevel(GLenum severity);
+	static void PrintMessage(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *message);
+
+	static void APIENTRY DebugCallback(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *message, const void *userParam);
+
+	static FString SourceToString(GLenum source);
+	static FString TypeToString(GLenum type);
+	static FString SeverityToString(GLenum severity);
+
+	GLenum mCurrentLevel = 0;
+	bool mBreakpointMode = false;
+};
+
+}
+#endif