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| author | Po Lu <luangruo@yahoo.com> | 2022-01-31 17:59:12 +0800 |
|---|---|---|
| committer | Po Lu <luangruo@yahoo.com> | 2022-01-31 18:05:13 +0800 |
| commit | 79896d3eb7f0d2e351196e5c896e21001b75f436 (patch) | |
| tree | aa59eb9f48fbca32d0a964ad2a9c22d714656afc /src/xfont.c | |
| parent | 9a56b4e6864c4e0815bb67805cfa67910ab3eeb5 (diff) | |
| download | emacs-79896d3eb7f0d2e351196e5c896e21001b75f436.tar.gz emacs-79896d3eb7f0d2e351196e5c896e21001b75f436.tar.bz2 emacs-79896d3eb7f0d2e351196e5c896e21001b75f436.zip | |
Improve portability of alpha channel handling on TrueColor visuals
* src/xfns.c (select_visual): Always ask for a TrueColor visual.
* src/xfont.c (xfont_draw):
* src/xftfont.c (xftfont_draw): Test `alpha_bits' instead of
n_planes.
* src/xterm.c (x_fill_rectangle, x_clear_rectangle): Likewise.
(x_query_colors, x_alloc_nearest_color): Remove code that
hard-coded alpha mask.
(x_term_init): Calculate alpha bits and offset and populate
field appropriately.
* src/xterm.h (struct x_display_info): New fields `alpha_bits'
and `alpha_offset'.
(x_make_truecolor_pixel): Stop hardcoding the value of the alpha
mask.
Diffstat (limited to 'src/xfont.c')
| -rw-r--r-- | src/xfont.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/xfont.c b/src/xfont.c index 78f5f19bc84..684c28ab21a 100644 --- a/src/xfont.c +++ b/src/xfont.c @@ -1005,7 +1005,7 @@ xfont_draw (struct glyph_string *s, int from, int to, int x, int y, #if defined HAVE_XRENDER && (RENDER_MAJOR > 0 || (RENDER_MINOR >= 2)) if (with_background - && FRAME_DISPLAY_INFO (s->f)->n_planes == 32 + && FRAME_DISPLAY_INFO (s->f)->alpha_bits && FRAME_CHECK_XR_VERSION (s->f, 0, 2)) { x_xr_ensure_picture (s->f); |