--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/libmlk-ui/ui/theme.c	Fri Oct 01 20:30:00 2021 +0200
@@ -0,0 +1,153 @@
+/*
+ * theme.c -- abstract theming
+ *
+ * Copyright (c) 2020-2021 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <assert.h>
+#include <stddef.h>
+#include <string.h>
+
+#include <core/font.h>
+#include <core/maths.h>
+#include <core/painter.h>
+#include <core/panic.h>
+#include <core/texture.h>
+#include <core/util.h>
+
+#include <assets/fonts/opensans-light.h>
+#include <assets/fonts/opensans-regular.h>
+
+#include "align.h"
+#include "button.h"
+#include "checkbox.h"
+#include "frame.h"
+#include "label.h"
+#include "theme.h"
+
+#define THEME(t) (t ? t : &default_theme)
+
+/* Default font catalog. */
+#define FONT(bin, size, index)                                          \
+	{ bin, sizeof (bin), size, &default_theme.fonts[index], {0} }
+
+/* Default theme. */
+static struct theme default_theme = {
+	.colors = {
+		[THEME_COLOR_DEBUG]     = 0xff0000ff,
+		[THEME_COLOR_NORMAL]    = 0xffffffff,
+		[THEME_COLOR_SELECTED]  = 0x006554ff,
+		[THEME_COLOR_SHADOW]    = 0x000000ff
+	},
+	.padding = 10,
+	.draw_frame = frame_draw_default,
+	.draw_label = label_draw_default,
+	.draw_button = button_draw_default,
+	.draw_checkbox = checkbox_draw_default
+};
+
+static struct font_catalog {
+	const unsigned char *data;
+	const size_t datasz;
+	unsigned int size;
+	struct font **dest;
+	struct font font;
+} default_fonts[] = {
+	FONT(assets_fonts_opensans_light, 12, THEME_FONT_DEBUG),
+	FONT(assets_fonts_opensans_regular, 14, THEME_FONT_INTERFACE)
+};
+
+int
+theme_init(void)
+{
+	/* Open all fonts. */
+	for (size_t i = 0; i < UTIL_SIZE(default_fonts); ++i) {
+		struct font_catalog *fc = &default_fonts[i];
+
+		if (font_openmem(&fc->font, fc->data, fc->datasz, fc->size) < 0)
+			goto failed;
+
+		/* Reference this font into the catalog. */
+		*default_fonts[i].dest = &default_fonts[i].font;
+	}
+
+	return 0;
+
+failed:
+	theme_finish();
+
+	return -1;
+}
+
+struct theme *
+theme_default(void)
+{
+	return &default_theme;
+}
+
+unsigned int
+theme_padding(const struct theme *t)
+{
+	return THEME(t)->padding;
+}
+
+void
+theme_shallow(struct theme *dst, const struct theme *src)
+{
+	assert(dst);
+
+	memcpy(dst, src ? src : &default_theme, sizeof (*src));
+}
+
+void
+theme_draw_frame(const struct theme *t, const struct frame *frame)
+{
+	assert(frame);
+
+	THEME(t)->draw_frame(THEME(t), frame);
+}
+
+void
+theme_draw_label(const struct theme *t, const struct label *label)
+{
+	assert(label);
+
+	THEME(t)->draw_label(THEME(t), label);
+}
+
+void
+theme_draw_button(const struct theme *t, const struct button *button)
+{
+	assert(button);
+
+	THEME(t)->draw_button(THEME(t), button);
+}
+
+void
+theme_draw_checkbox(const struct theme *t, const struct checkbox *cb)
+{
+	assert(cb);
+
+	THEME(t)->draw_checkbox(THEME(t), cb);
+}
+
+void
+theme_finish(void)
+{
+	for (size_t i = 0; i < UTIL_SIZE(default_fonts); ++i) {
+		font_finish(&default_fonts[i].font);
+		*default_fonts[i].dest = NULL;
+	}
+}