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Telegram/lib_ui/ui/text/custom_emoji_text_badge.cpp

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#include "ui/text/custom_emoji_text_badge.h"
+
+#include "ui/text/text.h"
+#include "ui/painter.h"
+#include "styles/style_widgets.h"
+
+namespace Ui::Text {
+
+[[nodiscard]] PaletteDependentEmoji CustomEmojiTextBadge(
+		const QString &text,
+		const style::RoundButton &st,
+		const style::margins &margin) {
+	return { .factory = [=, &st] {
+		auto string = Ui::Text::String(st.style, text.toUpper());
+		const auto size = QSize(string.maxWidth(), string.minHeight());
+		const auto full = QSize(
+			(st.width < 0) ? (size.width() - st.width) : st.width,
+			st.height);
+		const auto ratio = style::DevicePixelRatio();
+
+		auto result = QImage(
+			full * ratio,
+			QImage::Format_ARGB32_Premultiplied);
+		result.setDevicePixelRatio(ratio);
+		result.fill(Qt::transparent);
+
+		auto p = QPainter(&result);
+		auto hq = PainterHighQualityEnabler(p);
+		p.setPen(Qt::NoPen);
+		p.setBrush(st.textBg);
+
+		const auto r = st.radius;
+		p.drawRoundedRect(0, 0, full.width(), full.height(), r, r);
+
+		const auto x = (full.width() - size.width()) / 2;
+		p.setPen(st.textFg);
+		string.draw(p, {
+			.position = { x, st.textTop },
+			.availableWidth = size.width(),
+		});
+
+		p.end();
+		return result;
+	}, .margin = margin };
+}
+
+}