labwc/include/common/graphic-helpers.h

/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef LABWC_GRAPHIC_HELPERS_H
#define LABWC_GRAPHIC_HELPERS_H

#include <cairo.h>

struct wlr_fbox;

/**
 * Sets the cairo color.
 * Splits a float[4] single color array into its own arguments
 */
void set_cairo_color(cairo_t *cairo, const float *color);

/* Draws a border with a specified line width */
void draw_cairo_border(cairo_t *cairo, struct wlr_fbox fbox, double line_width);

struct lab_data_buffer;

#endif /* LABWC_GRAPHIC_HELPERS_H */
common/graphic-helpers: Add multi_rect 2022-08-20 00:01:06 +02:00			`/* SPDX-License-Identifier: GPL-2.0-only */`
includes: identifier consistency in include guards Made all header files to have LABWC_ prefix in include guard identifers. Converted from __LABWC_ in 35 include/ files. Converted from __LAB_ in 5 include/ files. Added LABWC prefix to 3 include/ files. Added include guards to 3 include/ files. The double underscores were removed since according to C standard those "are always reserved for any use". 2023-05-13 16:10:33 +03:00			`#ifndef LABWC_GRAPHIC_HELPERS_H`
			`#define LABWC_GRAPHIC_HELPERS_H`
common/graphic-helpers: Add multi_rect 2022-08-20 00:01:06 +02:00
SnapToRegion: Add implementation 2022-07-06 17:37:22 +02:00			`#include <cairo.h>`
s/wl_list_insert(list.prev...)/wl_list_append(list...)/ 2022-10-05 08:43:56 +02:00
osd: use theme->osd_border_width for focused item 2023-06-29 17:45:33 +01:00			`struct wlr_fbox;`
common/graphic-helpers: Add multi_rect 2022-08-20 00:01:06 +02:00
common/graphic-helpers: Add cairo helpers 2022-08-20 20:11:58 +02:00			`/**`
			`* Sets the cairo color.`
			`* Splits a float[4] single color array into its own arguments`
			`*/`
common: render text buffers with opaque background After a roundabout discussion[1] with wlroots devs, it's become apparent that subpixel text rendering (a.k.a. "ClearType") does not work properly when rendering over a transparent background, as labwc currently does. Basically it comes down to the fact that the color of semi-transparent pixels (which is adjusted redder or bluer to compensate for RGB subpixel alignment) depends somewhat on background color. When rendering over transparency, the text engine doesn't know the intended background color and can't adjust the pixel colors correctly. With Pango/Cairo, the end result can range from grayscale rendering (no subpixel rendering at all) to wrong/oversaturated colors (for example, bright pink pixels when rendering white text on blue background). This change solves the issue by first filling the text buffer with an opaque background color before rendering the text over it. Currently, this is easy since the background is always a solid color. It may be a little more complex (but doable) if we implement gradients in future. Note that GTK 4 (and to some degree, recent versions of Microsoft Windows) avoid this issue by disabling subpixel rendering altogether. I would much prefer that labwc NOT do this -- it results in noticeably blurrier text on non-retina LCD screens, which are still common. [1] https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3822 2024-03-16 22:20:40 -04:00			`void set_cairo_color(cairo_t cairo, const float color);`
common/graphic-helpers: Add cairo helpers 2022-08-20 20:11:58 +02:00
			`/* Draws a border with a specified line width */`
osd: use theme->osd_border_width for focused item 2023-06-29 17:45:33 +01:00			`void draw_cairo_border(cairo_t *cairo, struct wlr_fbox fbox, double line_width);`
includes: identifier consistency in include guards Made all header files to have LABWC_ prefix in include guard identifers. Converted from __LABWC_ in 35 include/ files. Converted from __LAB_ in 5 include/ files. Added LABWC prefix to 3 include/ files. Added include guards to 3 include/ files. The double underscores were removed since according to C standard those "are always reserved for any use". 2023-05-13 16:10:33 +03:00
theme: create hover button fallbacks ...by copying the non-hover variant and adding a transparent overlay. Co-authored-by: @johanmalm 2023-12-17 02:16:49 +01:00			`struct lab_data_buffer;`

includes: identifier consistency in include guards Made all header files to have LABWC_ prefix in include guard identifers. Converted from __LABWC_ in 35 include/ files. Converted from __LAB_ in 5 include/ files. Added LABWC prefix to 3 include/ files. Added include guards to 3 include/ files. The double underscores were removed since according to C standard those "are always reserved for any use". 2023-05-13 16:10:33 +03:00			`#endif /* LABWC_GRAPHIC_HELPERS_H */`