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Replace get_alpha_pict with get_alpha_step 

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui 2018-10-20 20:08:43 +01:00
parent 16f202f4a0
commit 3ffc0c77ed
1 changed files with 10 additions and 22 deletions
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32
src/compton.c
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@ -214,6 +214,12 @@ static const char *background_props_str[] = {
/// have a pointer to current session passed in.
session_t *ps_g = NULL;
static inline int
get_alpha_step(session_t *ps, opacity_t o) {
double d = ((double) o) / OPAQUE;
return (int)(round(normalize_d(d) / ps->o.alpha_step));
}
static inline void
__attribute__((nonnull(1, 2)))
set_tgt_clip(session_t *ps, region_t *reg) {
@ -1003,25 +1009,6 @@ find_client_win(session_t *ps, xcb_window_t w) {
return ret;
}
/**
* Get alpha <code>Picture</code> for an opacity in <code>double</code>.
*/
static inline xcb_render_picture_t
get_alpha_pict_d(session_t *ps, double o) {
assert((round(normalize_d(o) / ps->o.alpha_step)) <= round(1.0 / ps->o.alpha_step));
return ps->alpha_picts[(int) (round(normalize_d(o)
/ ps->o.alpha_step))];
}
/**
* Get alpha <code>Picture</code> for an opacity in
* <code>opacity_t</code>.
*/
static inline xcb_render_picture_t
get_alpha_pict_o(session_t *ps, opacity_t o) {
return get_alpha_pict_d(ps, (double) o / OPAQUE);
}
static win *
paint_preprocess(session_t *ps, win *list) {
win *t = NULL, *next = NULL;
@ -1111,7 +1098,7 @@ paint_preprocess(session_t *ps, win *list) {
|| w->g.x + w->g.width < 1 || w->g.y + w->g.height < 1
|| w->g.x >= ps->root_width || w->g.y >= ps->root_height
|| ((IsUnmapped == w->a.map_state || w->destroyed) && !w->paint.pixmap)
|| get_alpha_pict_o(ps, w->opacity) == ps->alpha_picts[0]
|| get_alpha_step(ps, w->opacity) == 0
|| w->paint_excluded)
to_paint = false;
//printf_errf("(): %s %d %d %d", w->name, to_paint, w->opacity, w->paint_excluded);
@ -1425,8 +1412,9 @@ render(session_t *ps, int x, int y, int dx, int dy, int wid, int hei,
case BKEND_XRENDER:
case BKEND_XR_GLX_HYBRID:
{
xcb_render_picture_t alpha_pict = get_alpha_pict_d(ps, opacity);
if (alpha_pict != ps->alpha_picts[0]) {
int alpha_step = get_alpha_step(ps, opacity * OPAQUE);
xcb_render_picture_t alpha_pict = ps->alpha_picts[alpha_step];
if (alpha_step != 0) {
int op = ((!argb && !alpha_pict) ? XCB_RENDER_PICT_OP_SRC: XCB_RENDER_PICT_OP_OVER);
xcb_render_composite(ps->c, op, pict, alpha_pict,
ps->tgt_buffer.pict, x, y, 0, 0, dx, dy, wid, hei);