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bug#65042: 30.0.50; alpha-background doesn't effect background of stippl
From: |
Felix |
Subject: |
bug#65042: 30.0.50; alpha-background doesn't effect background of stipple in emacs 30.0.50 pgtk |
Date: |
Fri, 04 Aug 2023 14:43:40 +0200 |
User-agent: |
mu4e 1.11.12; emacs 30.0.50 |
Po Lu <luangruo@yahoo.com> writes:
> Felix <felix.dick@web.de> writes:
>
>> Po Lu <luangruo@yahoo.com> writes:
>>
>>> Felix <felix.dick@web.de> writes:
>>>
>>>> The background of stipple stays opaque with alpha-background parameter
>>>> set for transparency.
>>>> This came up in the use of the new package 'indent-bars'.
>>>> The github issue: https://github.com/jdtsmith/indent-bars/issues/8
>>>> I tested this with 'emacs -Q' only enabling the needed packages (compat
>>>> and indent-bars).
>>>
>>> Thanks. Do stipples start displaying adequately with this change?
>>>
>> No it doesn't.
>> But it gives weird artifacts (doubling the character one
>> line above or something like that)
>
> How about this?
>
> diff --git a/src/pgtkterm.c b/src/pgtkterm.c
> index 9c1fc7bef4e..a7c687d811d 100644
> --- a/src/pgtkterm.c
> +++ b/src/pgtkterm.c
> @@ -1328,14 +1328,17 @@ fill_background_by_face (struct frame *f, struct face
> *face, int x, int y,
> int width, int height)
> {
> cairo_t *cr = pgtk_begin_cr_clip (f);
> + double r, g, b, a;
>
> + cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
> cairo_rectangle (cr, x, y, width, height);
> cairo_clip (cr);
>
> - double r = ((face->background >> 16) & 0xff) / 255.0;
> - double g = ((face->background >> 8) & 0xff) / 255.0;
> - double b = ((face->background >> 0) & 0xff) / 255.0;
> - cairo_set_source_rgb (cr, r, g, b);
> + r = ((face->background >> 16) & 0xff) / 255.0;
> + g = ((face->background >> 8) & 0xff) / 255.0;
> + b = ((face->background >> 0) & 0xff) / 255.0;
> + a = f->alpha_background;
> + cairo_set_source_rgba (cr, r, g, b, a);
> cairo_paint (cr);
>
> if (face->stipple != 0)
> @@ -1343,10 +1346,10 @@ fill_background_by_face (struct frame *f, struct face
> *face, int x, int y,
> cairo_pattern_t *mask
> = FRAME_DISPLAY_INFO (f)->bitmaps[face->stipple - 1].pattern;
>
> - double r = ((face->foreground >> 16) & 0xff) / 255.0;
> - double g = ((face->foreground >> 8) & 0xff) / 255.0;
> - double b = ((face->foreground >> 0) & 0xff) / 255.0;
> - cairo_set_source_rgb (cr, r, g, b);
> + r = ((face->foreground >> 16) & 0xff) / 255.0;
> + g = ((face->foreground >> 8) & 0xff) / 255.0;
> + b = ((face->foreground >> 0) & 0xff) / 255.0;
> + cairo_set_source_rgba (cr, r, g, b, a);
> cairo_mask (cr, mask);
> }
>
This time it works,
Thanks for this, and thanks your work on Emacs in general!
- bug#65042: 30.0.50; alpha-background doesn't effect background of stipple in emacs 30.0.50 pgtk, Felix, 2023/08/03
- bug#65042: Simple example to reproduce., Felix, 2023/08/03
- bug#65042: 30.0.50; alpha-background doesn't effect background of stipple in emacs 30.0.50 pgtk, Po Lu, 2023/08/03
- bug#65042: 30.0.50; alpha-background doesn't effect background of stipple in emacs 30.0.50 pgtk, Felix, 2023/08/03
- bug#65042: 30.0.50; alpha-background doesn't effect background of stipple in emacs 30.0.50 pgtk, Po Lu, 2023/08/03
- bug#65042: 30.0.50; alpha-background doesn't effect background of stipple in emacs 30.0.50 pgtk,
Felix <=
- bug#65042: 30.0.50; alpha-background doesn't effect background of stipple in emacs 30.0.50 pgtk, Po Lu, 2023/08/04
- bug#65042: 30.0.50; alpha-background doesn't effect background of stipple in emacs 30.0.50 pgtk, Eli Zaretskii, 2023/08/04
- bug#65042: 30.0.50; alpha-background doesn't effect background of stipple in emacs 30.0.50 pgtk, Felix, 2023/08/07
- bug#65042: 30.0.50; alpha-background doesn't effect background of stipple in emacs 30.0.50 pgtk, Po Lu, 2023/08/07