[gtk/wip/chergert/gdk-macos-gl-renderer] macos: provide GL driver information to debug message

[Christian Hergert <chergert src gnome org>]

commit 96722a9ebcb1861c11691e5d6dff1eb5efacd60f
Author: Christian Hergert <chergert redhat com>
Date:   Wed Oct 28 14:54:27 2020 -0700

    macos: provide GL driver information to debug message
    
    This can be useful to be sure you're using the right renderer to drive
    the GL context.

 gdk/macos/gdkmacosglcontext.c | 44 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)
---
diff --git a/gdk/macos/gdkmacosglcontext.c b/gdk/macos/gdkmacosglcontext.c
index 9ecef3dafa..fab6cfde42 100644
--- a/gdk/macos/gdkmacosglcontext.c
+++ b/gdk/macos/gdkmacosglcontext.c
@@ -33,6 +33,44 @@ G_GNUC_BEGIN_IGNORE_DEPRECATIONS
 
 G_DEFINE_TYPE (GdkMacosGLContext, gdk_macos_gl_context, GDK_TYPE_GL_CONTEXT)
 
+static const char *
+get_renderer_name (GLint id)
+{
+  static char renderer_name[32];
+
+  switch (id & kCGLRendererIDMatchingMask)
+  {
+  case kCGLRendererGenericID: return "Generic";
+  case kCGLRendererGenericFloatID: return "Generic Float";
+  case kCGLRendererAppleSWID: return "Apple Software Renderer";
+  case kCGLRendererATIRage128ID: return "ATI Rage 128";
+  case kCGLRendererATIRadeonID: return "ATI Radeon";
+  case kCGLRendererATIRageProID: return "ATI Rage Pro";
+  case kCGLRendererATIRadeon8500ID: return "ATI Radeon 8500";
+  case kCGLRendererATIRadeon9700ID: return "ATI Radeon 9700";
+  case kCGLRendererATIRadeonX1000ID: return "ATI Radeon X1000";
+  case kCGLRendererATIRadeonX2000ID: return "ATI Radeon X2000";
+  case kCGLRendererATIRadeonX3000ID: return "ATI Radeon X3000";
+  case kCGLRendererATIRadeonX4000ID: return "ATI Radeon X4000";
+  case kCGLRendererGeForce2MXID: return "GeForce 2 MX";
+  case kCGLRendererGeForce3ID: return "GeForce 3";
+  case kCGLRendererGeForceFXID: return "GeForce FX";
+  case kCGLRendererGeForce8xxxID: return "GeForce 8xxx";
+  case kCGLRendererGeForceID: return "GeForce";
+  case kCGLRendererVTBladeXP2ID: return "VT Blade XP 2";
+  case kCGLRendererIntel900ID: return "Intel 900";
+  case kCGLRendererIntelX3100ID: return "Intel X3100";
+  case kCGLRendererIntelHDID: return "Intel HD";
+  case kCGLRendererIntelHD4000ID: return "Intel HD 4000";
+  case kCGLRendererIntelHD5000ID: return "Intel HD 5000";
+  case kCGLRendererMesa3DFXID: return "Mesa 3DFX";
+
+  default:
+    snprintf (renderer_name, sizeof renderer_name, "0x%08x", id & kCGLRendererIDMatchingMask);
+    renderer_name[sizeof renderer_name-1] = 0;
+    return renderer_name;
+  }
+}
 
 static NSOpenGLContext *
 get_ns_open_gl_context (GdkMacosGLContext  *self,
@@ -199,9 +237,13 @@ gdk_macos_gl_context_real_realize (GdkGLContext  *context,
 
   [gl_context makeCurrentContext];
 
+  GLint renderer_id = 0;
+  [gl_context getValues:&renderer_id forParameter:NSOpenGLContextParameterCurrentRendererID];
   GDK_DISPLAY_NOTE (gdk_draw_context_get_display (GDK_DRAW_CONTEXT (context)),
                     OPENGL,
-                    g_message ("Created NSOpenGLContext[%p]", gl_context));
+                    g_message ("Created NSOpenGLContext[%p] using %s",
+                               gl_context,
+                               get_renderer_name (renderer_id)));
 
   self->gl_context = g_steal_pointer (&gl_context);