[gtk+/wip/gl-texture] Add private api to get at the gl texture data

[Matthias Clasen <matthiasc src gnome org>]

commit a4aaecb6d4bc446dd6f334589c45835e00966690
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jan 17 00:51:37 2018 -0500

    Add private api to get at the gl texture data
    
    This will be used by the GSK GL renderer to treat this
    kind of texture properly.

 gdk/gdktexture.c        |   15 ++++++++++++---
 gdk/gdktextureprivate.h |    7 +++++++
 2 files changed, 19 insertions(+), 3 deletions(-)
---
diff --git a/gdk/gdktexture.c b/gdk/gdktexture.c
index 9b9ebf0..5b04247 100644
--- a/gdk/gdktexture.c
+++ b/gdk/gdktexture.c
@@ -436,9 +436,6 @@ gdk_pixbuf_texture_init (GdkPixbufTexture *self)
 
 /* GdkGLTexture */
 
-#define GDK_TYPE_GL_TEXTURE (gdk_gl_texture_get_type ())
-
-G_DECLARE_FINAL_TYPE (GdkGLTexture, gdk_gl_texture, GDK, GL_TEXTURE, GdkTexture)
 
 struct _GdkGLTexture {
   GdkTexture parent_instance;
@@ -501,6 +498,18 @@ gdk_gl_texture_init (GdkGLTexture *self)
 {
 }
 
+GdkGLContext *
+gdk_gl_texture_get_context (GdkGLTexture *self)
+{
+  return self->context;
+}
+
+int
+gdk_gl_texture_get_id (GdkGLTexture *self)
+{
+  return self->id;
+}
+
 /**
  * gdk_texture_new_for_pixbuf:
  * @pixbuf: a #GdkPixbuf
diff --git a/gdk/gdktextureprivate.h b/gdk/gdktextureprivate.h
index f9e5fbe..6aa96d1 100644
--- a/gdk/gdktextureprivate.h
+++ b/gdk/gdktextureprivate.h
@@ -44,6 +44,13 @@ void                    gdk_texture_clear_render_data   (GdkTexture
 gpointer                gdk_texture_get_render_data     (GdkTexture             *self,
                                                          gpointer                key);
 
+#define GDK_TYPE_GL_TEXTURE (gdk_gl_texture_get_type ())
+
+G_DECLARE_FINAL_TYPE (GdkGLTexture, gdk_gl_texture, GDK, GL_TEXTURE, GdkTexture)
+
+GdkGLContext *          gdk_gl_texture_get_context      (GdkGLTexture           *self);
+int                     gdk_gl_texture_get_id           (GdkGLTexture           *self);
+
 G_END_DECLS
 
 #endif /* __GDK_TEXTURE_PRIVATE_H__ */