From 2a3b8a213d5076aa6f051e88858b65ebfc53f64a Mon Sep 17 00:00:00 2001
From: Nobuhiko Tanibata <nobuhiko_tanibata@xddp.denso.co.jp>
Date: Mon, 30 Nov 2015 15:08:32 +0900
Subject: [PATCH] ivi-shell: transforming from a single screen coordinates to
 multi screen coordinates: global coordinates.

In single screen, the coordinates of layer local coordinates are the
same as global coordinates. However, to support multi screens, the
layer-local coordinates shall be transformed to multi screen coordinates,
which is global coordinates. The abosolute coordinates of a screen in global
stored in (x,y) of output of its weston output so it shall be used to
transform layer-local to global coordinates.

Signed-off-by: Nobuhiko Tanibata <nobuhiko_tanibata@xddp.denso.co.jp>
---
 ivi-shell/ivi-layout.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/ivi-shell/ivi-layout.c b/ivi-shell/ivi-layout.c
index 1773af8..65c2735 100644
--- a/ivi-shell/ivi-layout.c
+++ b/ivi-shell/ivi-layout.c
@@ -679,6 +679,7 @@ calc_inverse_matrix_transform(const struct weston_matrix *matrix,
  */
 static void
 calc_surface_to_global_matrix_and_mask_to_weston_surface(
+	struct ivi_layout_screen  *iviscrn,
 	struct ivi_layout_layer *ivilayer,
 	struct ivi_layout_surface *ivisurf,
 	struct weston_matrix *m,
@@ -686,6 +687,7 @@ calc_surface_to_global_matrix_and_mask_to_weston_surface(
 {
 	const struct ivi_layout_surface_properties *sp = &ivisurf->prop;
 	const struct ivi_layout_layer_properties *lp = &ivilayer->prop;
+	struct weston_output *output = iviscrn->output;
 	struct ivi_rectangle weston_surface_rect = { 0,
 						     0,
 						     ivisurf->surface->width,
@@ -713,7 +715,9 @@ calc_surface_to_global_matrix_and_mask_to_weston_surface(
 	 * coordinates to global coordinates, which is computed by
 	 * two steps,
 	 * - surface-local coordinates to layer-local coordinates
-	 * - layer-local coordinates to global coordinates
+	 * - layer-local coordinates to a single screen-local coordinates
+	 * - a single screen-local coordinates to multi screen coordinates,
+         *   which is global coordinates.
 	 */
 	calc_transformation_matrix(&surface_source_rect,
 				   &surface_dest_rect,
@@ -723,6 +727,8 @@ calc_surface_to_global_matrix_and_mask_to_weston_surface(
 				   &layer_dest_rect,
 				   lp->orientation, m);
 
+	weston_matrix_translate(m, output->x, output->y, 0.0f);
+
 	/* this intersected ivi_rectangle would be used for masking
 	 * weston_surface
 	 */
-- 
2.7.4