New function that creates a matrix that can transform buffer co-ordinates
to output co-ordinates (or the inverse of that matrix).
---
src/compositor.c | 19 +++++++++++++++++++
src/compositor.h | 6 +++++-
2 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/src/compositor.c b/src/compositor.c
index d629bd7..36fd7cc 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -845,6 +845,25 @@ weston_surface_to_buffer_rect(struct weston_surface
*surface,
}
WL_EXPORT void
+weston_view_to_output_matrix(struct weston_view *view,
+ struct weston_output *op,
+ bool inverse,
+ struct weston_matrix *matrix)
+{
+ *matrix = view->surface->buffer_to_surface_matrix;
+ if (view->transform.enabled)
+ weston_matrix_multiply(matrix, &view->transform.matrix);
+ else
+ weston_matrix_translate(matrix,
+ view->geometry.x,
+ view->geometry.y, 0);
+ weston_matrix_multiply(matrix, &op->matrix);
+
+ if (inverse)
+ weston_matrix_invert(matrix, matrix);
+}
+
+WL_EXPORT void
weston_view_move_to_plane(struct weston_view *view,
struct weston_plane *plane)
{
diff --git a/src/compositor.h b/src/compositor.h
index 8e2cf47..b375262 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -1005,7 +1005,11 @@ weston_surface_to_buffer(struct weston_surface *surface,
pixman_box32_t
weston_surface_to_buffer_rect(struct weston_surface *surface,
pixman_box32_t rect);
-
+void
+weston_view_to_output_matrix(struct weston_view *view,
+ struct weston_output *op,
+ bool inverse,
+ struct weston_matrix *matrix);
void
weston_spring_init(struct weston_spring *spring,
double k, double current, double target);
--
2.1.1
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