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Telegram/SourceFiles/ui/image/image.h

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "ui/image/image_prepare.h"
+
+class QPainterPath;
+
+class Image final {
+public:
+	explicit Image(const QString &path);
+	explicit Image(const QByteArray &content);
+	explicit Image(QImage &&data);
+
+	[[nodiscard]] static not_null<Image*> Empty(); // 1x1 transparent
+	[[nodiscard]] static not_null<Image*> BlankMedia(); // 1x1 black
+
+	[[nodiscard]] int width() const {
+		return _data.width();
+	}
+	[[nodiscard]] int height() const {
+		return _data.height();
+	}
+	[[nodiscard]] QSize size() const {
+		return { width(), height() };
+	}
+
+	[[nodiscard]] bool isNull() const {
+		return (this == Empty());
+	}
+
+	[[nodiscard]] QImage original() const;
+
+	[[nodiscard]] const QPixmap &pix(
+			QSize size,
+			const Images::PrepareArgs &args = {}) const {
+		return cached(size.width(), size.height(), args, false);
+	}
+	[[nodiscard]] const QPixmap &pix(
+			int w,
+			int h,
+			const Images::PrepareArgs &args = {}) const {
+		return cached(w, h, args, false);
+	}
+	[[nodiscard]] const QPixmap &pix(
+			int w = 0,
+			const Images::PrepareArgs &args = {}) const {
+		return cached(w, 0, args, false);
+	}
+
+	[[nodiscard]] const QPixmap &pixSingle(
+			QSize size,
+			const Images::PrepareArgs &args = {}) const {
+		return cached(size.width(), size.height(), args, true);
+	}
+	[[nodiscard]] const QPixmap &pixSingle(
+			int w,
+			int h,
+			const Images::PrepareArgs &args = {}) const {
+		return cached(w, h, args, true);
+	}
+	[[nodiscard]] const QPixmap &pixSingle(
+			int w = 0,
+			const Images::PrepareArgs &args = {}) const {
+		return cached(w, 0, args, true);
+	}
+
+	[[nodiscard]] QPixmap pixNoCache(
+			QSize size,
+			const Images::PrepareArgs &args = {}) const {
+		return prepare(size.width(), size.height(), args);
+	}
+	[[nodiscard]] QPixmap pixNoCache(
+			int w,
+			int h,
+			const Images::PrepareArgs &args = {}) const {
+		return prepare(w, h, args);
+	}
+	[[nodiscard]] QPixmap pixNoCache(
+			int w = 0,
+			const Images::PrepareArgs &args = {}) const {
+		return prepare(w, 0, args);
+	}
+
+private:
+	[[nodiscard]] QPixmap prepare(
+		int w,
+		int h,
+		const Images::PrepareArgs &args) const;
+	[[nodiscard]] const QPixmap &cached(
+		int w,
+		int h,
+		const Images::PrepareArgs &args,
+		bool single) const;
+
+	const QImage _data;
+	mutable base::flat_map<uint64, QPixmap> _cache;
+
+};