render/gles2: transpose matrices before binding them

Setting glUniformMatrix3fv's transpose parameter to GL_TRUE is
not allowed for OpenGL ES 2.

This adds a wlr_matrix_transpose function.

1 files changed, 3 insertions, 2 deletions

diff --git a/include/wlr/types/wlr_matrix.h b/include/wlr/types/wlr_matrix.h
index fd060d11..02111db8 100644
--- a/include/wlr/types/wlr_matrix.h
+++ b/include/wlr/types/wlr_matrix.h
@@ -5,11 +5,12 @@
 #include <wlr/types/wlr_box.h>
 
 void wlr_matrix_identity(float mat[static 9]);
+void wlr_matrix_multiply(float mat[static 9], const float a[static 9],
+	const float b[static 9]);
+void wlr_matrix_transpose(float mat[static 9], const float a[static 9]);
 void wlr_matrix_translate(float mat[static 9], float x, float y);
 void wlr_matrix_scale(float mat[static 9], float x, float y);
 void wlr_matrix_rotate(float mat[static 9], float rad);
-void wlr_matrix_multiply(float mat[static 9], const float a[static 9],
-	const float b[static 9]);
 void wlr_matrix_transform(float mat[static 9],
 	enum wl_output_transform transform);
 void wlr_matrix_projection(float mat[static 9], int width, int height,