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-rw-r--r--include/xserver-properties.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/xserver-properties.h b/include/xserver-properties.h
index 30e8efb68..c6259aee1 100644
--- a/include/xserver-properties.h
+++ b/include/xserver-properties.h
@@ -35,6 +35,13 @@
/* BOOL. If present, device is a virtual XTEST device */
#define XI_PROP_XTEST_DEVICE "XTEST Device"
+/* Coordinate transformation matrix for absolute input devices
+ * FLOAT, 9 values in row-major order, coordinates in 0..1 range:
+ * [c0 c1 c2] [x]
+ * [c3 c4 c5] * [y]
+ * [c6 c7 c8] [1] */
+#define XI_PROP_TRANSFORM "Coordinate Transformation Matrix"
+
/* Pointer acceleration properties */
/* INTEGER of any format */
#define ACCEL_PROP_PROFILE_NUMBER "Device Accel Profile"