Fix build with custom DGL namespace, use it for OSX class names

dgl/src/pugl/pugl_osx.m

@@ -24,6 +24,9 @@
 
 #include "pugl_internal.h"
 
+#define PuglWindow PuglWindow ## DGL_NAMESPACE
+#define PuglOpenGLView PuglOpenGLView ## DGL_NAMESPACE
+
 @interface PuglWindow : NSWindow
 {
 @public

distrho/DistrhoUI.hpp

@@ -25,10 +25,10 @@
 typedef DISTRHO_NAMESPACE::ExternalWindow UIWidget;
 #elif DISTRHO_UI_USE_NANOVG
 # include "../dgl/NanoVG.hpp"
-typedef DGL::NanoWidget UIWidget;
+typedef DGL_NAMESPACE::NanoWidget UIWidget;
 #else
 # include "../dgl/Widget.hpp"
-typedef DGL::Widget UIWidget;
+typedef DGL_NAMESPACE::Widget UIWidget;
 #endif
 
 START_NAMESPACE_DISTRHO
@@ -214,7 +214,7 @@ private:
     void setAbsoluteX(int) const noexcept {}
     void setAbsoluteY(int) const noexcept {}
     void setAbsolutePos(int, int) const noexcept {}
-    void setAbsolutePos(const DGL::Point<int>&) const noexcept {}
+    void setAbsolutePos(const DGL_NAMESPACE::Point<int>&) const noexcept {}
 #endif
 
     DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(UI)

distrho/src/DistrhoUIInternal.hpp

@@ -22,9 +22,9 @@
 #ifdef HAVE_DGL
 # include "../../dgl/Application.hpp"
 # include "../../dgl/Window.hpp"
-using DGL::Application;
-using DGL::IdleCallback;
-using DGL::Window;
+using DGL_NAMESPACE::Application;
+using DGL_NAMESPACE::IdleCallback;
+using DGL_NAMESPACE::Window;
 #endif
 
 START_NAMESPACE_DISTRHO