[gtk/matthiasc/gltransition-demo: 9/10] Add a missing file

[Matthias Clasen <matthiasc src gnome org>]

commit 1d325d342d4ae96db951be6bfc6ea3c9bb85a1eb
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Sep 22 11:01:52 2020 -0400

    Add a missing file
    
    This was reconstructed from build failures.

 gsk/gskglshaderprivate.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
---
diff --git a/gsk/gskglshaderprivate.h b/gsk/gskglshaderprivate.h
new file mode 100644
index 0000000000..8061ea311a
--- /dev/null
+++ b/gsk/gskglshaderprivate.h
@@ -0,0 +1,17 @@
+#ifndef __GSK_GL_UNIFORM_H__
+#define __GSK_GL_UNIFORM_H__
+
+#include "gskglshader.h"
+
+typedef struct
+{
+  char *name;
+  GskGLUniformType type;
+  int offset;
+} GskGLUniform;
+
+
+const GskGLUniform *gsk_glshader_peek_uniforms (GskGLShader *shader,
+                                                int         *n_uniforms);
+
+#endif