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Use cairo to form xshape mask

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This commit is contained in:
Nikita Zlobin 2020-05-07 02:47:11 +05:00
parent 5fd090e618
commit 0e35c6acb0
1 changed files with 33 additions and 52 deletions
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85
src/x11/x.c
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@ -89,63 +89,44 @@ static void x_win_round_corners(struct window_x11 *win, const int rad)
{
const int width = win->dim.w;
const int height = win->dim.h;
const int dia = 2 * rad;
const int degrees = 64; // the factor to convert degrees to XFillArc's angle param
Pixmap mask = XCreatePixmap(xctx.dpy, win->xwin, width, height, 1);
XGCValues xgcv;
GC shape_gc = XCreateGC(xctx.dpy, mask, 0, &xgcv);
XSetForeground(xctx.dpy, shape_gc, 0);
XFillRectangle(xctx.dpy,
mask,
shape_gc,
0,
0,
width,
height);
XSetForeground(xctx.dpy, shape_gc, 1);
/* To mark all pixels, which should get exposed, we
* use a circle for every corner and two overlapping rectangles */
unsigned const int centercoords[] = {
0, 0,
width - dia - 1, 0,
0, height - dia - 1,
width - dia - 1, height - dia - 1,
unsigned const int coords[] = {
0 + rad,
width - rad,
height - rad,
};
for (int i = 0; i < sizeof(centercoords)/sizeof(unsigned int); i = i+2) {
XFillArc(xctx.dpy,
mask,
shape_gc,
centercoords[i]-1,
centercoords[i+1]-1,
dia+2,
dia+2,
degrees * 0,
degrees * 360);
}
XFillRectangle(xctx.dpy,
mask,
shape_gc,
rad,
0,
width-dia,
height);
XFillRectangle(xctx.dpy,
mask,
shape_gc,
0,
rad,
width,
height-dia);
Pixmap mask;
cairo_surface_t * cxbm;
cairo_t * cr;
Screen * scr;
mask = XCreatePixmap(xctx.dpy, win->xwin, width, height, 1);
scr = ScreenOfDisplay(xctx.dpy, win->cur_screen);
cxbm = cairo_xlib_surface_create_for_bitmap(xctx.dpy, mask, scr, width, height);
cr = cairo_create(cxbm);
cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba(cr, 0, 0, 0, 0);
cairo_paint(cr);
cairo_set_source_rgba(cr, 1, 1, 1, 1);
cairo_new_path(cr);
cairo_arc(cr, coords[0], coords[0], rad, M_PI, -M_PI_2);
cairo_arc(cr, coords[1], coords[0], rad, -M_PI_2, 0);
cairo_arc(cr, coords[1], coords[2], rad, 0, M_PI_2);
cairo_arc(cr, coords[0], coords[2], rad, M_PI_2, M_PI);
cairo_close_path(cr);
cairo_fill(cr);
cairo_show_page(cr);
cairo_destroy(cr);
cairo_surface_flush(cxbm);
cairo_surface_destroy(cxbm);
XShapeCombineMask(xctx.dpy, win->xwin, ShapeBounding, 0, 0, mask, ShapeSet);
XFreeGC(xctx.dpy, shape_gc);
XFreePixmap(xctx.dpy, mask);
XShapeSelectInput(xctx.dpy,