[mutter/gbsneto/graphene-matrix: 4/41] cogl/matrix: Add constant identity initializer

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 94a5a600340c901476710b4b5a57888d67ee55e7
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Sep 8 21:04:59 2020 -0300

    cogl/matrix: Add constant identity initializer

 cogl/cogl/cogl-matrix.h | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/cogl/cogl/cogl-matrix.h b/cogl/cogl/cogl-matrix.h
index 2cfd95bbb2..e784b094ae 100644
--- a/cogl/cogl/cogl-matrix.h
+++ b/cogl/cogl/cogl-matrix.h
@@ -121,6 +121,12 @@ struct _CoglMatrix
 };
 COGL_STRUCT_SIZE_ASSERT (CoglMatrix, 128 + sizeof (unsigned long) * 3);
 
+#define COGL_MATRIX_INIT_IDENTITY (CoglMatrix) { \
+  1.0f, 0.0f, 0.0f, 0.0f, \
+  0.0f, 1.0f, 0.0f, 0.0f, \
+  0.0f, 0.0f, 1.0f, 0.0f, \
+  0.0f, 0.0f, 0.0f, 1.0f, \
+}
 
 /**
  * cogl_matrix_init_identity: