From ca79307bdf9bc8042c9afd570bf10d605d3dfc1e Mon Sep 17 00:00:00 2001
From: Dan Amelang <dan@amelang.net>
Date: Mon, 20 Nov 2006 10:42:50 -0800
Subject: [PATCH] Add _cairo_matrix_is_translation

---
 src/cairo-matrix.c | 7 +++++++
 src/cairoint.h     | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/src/cairo-matrix.c b/src/cairo-matrix.c
index e2f353b23..ee3005805 100644
--- a/src/cairo-matrix.c
+++ b/src/cairo-matrix.c
@@ -548,6 +548,13 @@ _cairo_matrix_is_identity (const cairo_matrix_t *matrix)
 	    matrix->x0 == 0.0 && matrix->y0 == 0.0);
 }
 
+cairo_bool_t
+_cairo_matrix_is_translation (const cairo_matrix_t *matrix)
+{
+    return (matrix->xx == 1.0 && matrix->yx == 0.0 &&
+	    matrix->xy == 0.0 && matrix->yy == 1.0);
+}
+
 cairo_bool_t
 _cairo_matrix_is_integer_translation(const cairo_matrix_t *m,
 				     int *itx, int *ity)
diff --git a/src/cairoint.h b/src/cairoint.h
index dba575553..2ae909017 100755
--- a/src/cairoint.h
+++ b/src/cairoint.h
@@ -2197,6 +2197,9 @@ _cairo_matrix_compute_scale_factors (const cairo_matrix_t *matrix,
 cairo_private cairo_bool_t
 _cairo_matrix_is_identity (const cairo_matrix_t *matrix);
 
+cairo_private cairo_bool_t
+_cairo_matrix_is_translation (const cairo_matrix_t *matrix);
+
 cairo_private cairo_bool_t
 _cairo_matrix_is_integer_translation(const cairo_matrix_t *matrix,
 				     int *itx, int *ity);