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backend interface: Add visible hint

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Pass the visible region of the image to the backend, so the backend
could optimize based on that information.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2019-03-04 21:37:22 +00:00
parent a2ae36c1d6
commit c57f267535
5 changed files with 217 additions and 116 deletions
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28
src/win.c
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@@ -137,6 +137,29 @@ void win_get_region_noframe_local(const win *w, region_t *res) {
gen_by_val(win_get_region_noframe_local)
void win_get_region_frame_local(const win *w, region_t *res) {
const margin_t extents = win_calc_frame_extents(w);
pixman_region32_fini(res);
pixman_region32_init_rects(res, (rect_t[]){
// top
{.x1 = 0, .y1 = 0, .x2 = w->g.width, .y2 = extents.top},
// bottom
{.x1 = 0, .y1 = w->g.height - extents.bottom, .x2 = w->g.width, .y2 = w->g.height},
//left
{.x1 = 0, .y1 = 0, .x2 = extents.left, .y2 = w->g.height},
// right
{.x1 = w->g.width - extents.right, .y1 = 0, .x2 = w->g.width, .y2 = w->g.height},
}, 4);
// limit the frame region to inside the window
region_t reg_win;
pixman_region32_init_rect(&reg_win, 0, 0, w->g.width, w->g.height);
pixman_region32_intersect(res, &reg_win, res);
pixman_region32_fini(&reg_win);
}
gen_by_val(win_get_region_frame_local)
/**
* Add a window to damaged area.
*
@@ -1235,7 +1258,10 @@ void win_update_bounding_shape(session_t *ps, win *w) {
free(rects);
// Add border width because we are using a different origin.
// X thinks the top left of the inner window is the origin,
// X thinks the top left of the inner window is the origin
// (for the bounding shape, althought xcb_get_geometry thinks
// the outer top left (outer means outside of the window
// border) is the origin),
// We think the top left of the border is the origin
pixman_region32_translate(&br, w->g.border_width, w->g.border_width);