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ssd: support window icons

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The default `titleLayout` is updated to `icon:iconify,max,close` which
replaces the window menu button with the window icon.

When the icon file is not found or could not be loaded, the window menu
icon as before is shown.

The icon theme can be selected with `<theme><icon>`.

This commit adds libsfdo as an optional dependency. `-Dicon=disabled` can
be passsed to `meson setup` command in order to disable window icon, in
which case the window icon is always replaced with a window menu button.
This commit is contained in:
tokyo4j 2024-09-06 17:00:40 +09:00 • committed by Hiroaki Yamamoto
parent b9414d8b8d
commit a745f91169
32 changed files with 452 additions and 142 deletions
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77
src/button/button-png.c
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@ -1,77 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) Johan Malm 2023
*/
#define _POSIX_C_SOURCE 200809L
#include <cairo.h>
#include <png.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <wlr/util/log.h>
#include "buffer.h"
#include "button/button-png.h"
#include "button/common.h"
#include "common/string-helpers.h"
#include "labwc.h"
/*
* cairo_image_surface_create_from_png() does not gracefully handle non-png
* files, so we verify the header before trying to read the rest of the file.
*/
#define PNG_BYTES_TO_CHECK (4)
static bool
ispng(const char *filename)
{
unsigned char header[PNG_BYTES_TO_CHECK];
FILE *fp = fopen(filename, "rb");
if (!fp) {
return false;
}
if (fread(header, 1, PNG_BYTES_TO_CHECK, fp) != PNG_BYTES_TO_CHECK) {
fclose(fp);
return false;
}
if (png_sig_cmp(header, (png_size_t)0, PNG_BYTES_TO_CHECK)) {
wlr_log(WLR_ERROR, "file '%s' is not a recognised png file", filename);
fclose(fp);
return false;
}
fclose(fp);
return true;
}
#undef PNG_BYTES_TO_CHECK
void
button_png_load(const char *button_name, struct lab_data_buffer **buffer)
{
if (*buffer) {
wlr_buffer_drop(&(*buffer)->base);
*buffer = NULL;
}
if (string_null_or_empty(button_name)) {
return;
}
char path[4096] = { 0 };
button_filename(button_name, path, sizeof(path));
if (!ispng(path)) {
return;
}
cairo_surface_t *image = cairo_image_surface_create_from_png(path);
if (cairo_surface_status(image)) {
wlr_log(WLR_ERROR, "error reading png button '%s'", path);
cairo_surface_destroy(image);
return;
}
cairo_surface_flush(image);
double w = cairo_image_surface_get_width(image);
double h = cairo_image_surface_get_height(image);
*buffer = buffer_create_cairo((int)w, (int)h, 1.0, true);
cairo_t *cairo = (*buffer)->cairo;
cairo_set_source_surface(cairo, image, 0, 0);
cairo_paint_with_alpha(cairo, 1.0);
}