On 06/03/15 05:03 AM, Pekka Paalanen wrote:
> From: Pekka Paalanen <[email protected]>
>
> This will be used by pixman-renderer.
>
> Signed-off-by: Pekka Paalanen <[email protected]>
> ---
> src/compositor.c | 36 ++++++++++++++++++++++++++++++++++++
> src/compositor.h | 5 +++++
> 2 files changed, 41 insertions(+)
>
> diff --git a/src/compositor.c b/src/compositor.c
> index 45e8f5c..1747c6f 100644
> --- a/src/compositor.c
> +++ b/src/compositor.c
> @@ -930,6 +930,42 @@ weston_surface_to_buffer_rect(struct weston_surface
> *surface,
> rect);
> }
>
> +/** Transform a region from surface coordinates to buffer coordinates
> + *
> + * \param surface The surface to fetch wl_viewport and buffer transformation
> + * from.
> + * \param surface_region[in] The region in surface coordinates.
> + * \param buffer_region[out] The region coverted to buffer coordinates.
s/coverted/converted
> + *
> + * Buffer_region must be init'd, but will be completely overwritten.
> + *
> + * Viewport and buffer transformations can only do translation, scaling,
> + * and rotations in 90-degree steps. Therefore the only loss in the
> + * conversion is coordinate flooring (rounding).
> + */
> +WL_EXPORT void
> +weston_surface_to_buffer_region(struct weston_surface *surface,
> + pixman_region32_t *surface_region,
> + pixman_region32_t *buffer_region)
> +{
> + pixman_box32_t *src_rects, *dest_rects;
> + int nrects, i;
> +
> + src_rects = pixman_region32_rectangles(surface_region, &nrects);
> + dest_rects = malloc(nrects * sizeof(*dest_rects));
> + if (!dest_rects)
> + return;
> +
> + for (i = 0; i < nrects; i++) {
> + dest_rects[i] = weston_surface_to_buffer_rect(surface,
> + src_rects[i]);
> + }
> +
> + pixman_region32_fini(buffer_region);
> + pixman_region32_init_rects(buffer_region, dest_rects, nrects);
> + free(dest_rects);
> +}
> +
> 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 f4ba7a5..2feaafd 100644
> --- a/src/compositor.h
> +++ b/src/compositor.h
> @@ -1029,6 +1029,11 @@ weston_surface_to_buffer_rect(struct weston_surface
> *surface,
> pixman_box32_t rect);
>
> void
> +weston_surface_to_buffer_region(struct weston_surface *surface,
> + pixman_region32_t *surface_region,
> + pixman_region32_t *buffer_region);
> +
> +void
> weston_spring_init(struct weston_spring *spring,
> double k, double current, double target);
> void
>
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