Use outlined large emoji.

Telegram/SourceFiles/chat_helpers/stickers_emoji_pack.cpp

@@ -28,7 +28,7 @@ public:
 		crl::weak_on_queue<EmojiImageLoader> weak,
 		int id);
 
-	[[nodiscard]] QImage prepare(const IsolatedEmoji &emoji);
+	[[nodiscard]] QImage prepare(EmojiPtr emoji);
 	void switchTo(int id);
 
 private:
@@ -44,16 +44,11 @@ namespace {
 constexpr auto kRefreshTimeout = TimeId(7200);
 constexpr auto kUnloadTimeout = 86400 * crl::time(1000);
 
-[[nodiscard]] QSize CalculateSize(const IsolatedEmoji &emoji) {
-	using namespace rpl::mappers;
-
+[[nodiscard]] QSize SingleSize() {
 	const auto single = st::largeEmojiSize;
-	const auto skip = st::largeEmojiSkip;
 	const auto outline = st::largeEmojiOutline;
-	const auto count = ranges::count_if(emoji.items, _1 != nullptr);
-	const auto items = single * count + skip * (count - 1);
 	return QSize(
-		2 * outline + items,
+		2 * outline + single,
 		2 * outline + single
 	) * cIntRetinaFactor();
 }
@@ -61,7 +56,7 @@ constexpr auto kUnloadTimeout = 86400 * crl::time(1000);
 class ImageSource : public Images::Source {
 public:
 	explicit ImageSource(
-		const IsolatedEmoji &emoji,
+		EmojiPtr emoji,
 		not_null<crl::object_on_queue<EmojiImageLoader>*> loader);
 
 	void load(Data::FileOrigin origin) override;
@@ -100,7 +95,7 @@ private:
 	// While HistoryView::Element-s are almost never destroyed
 	// we make loading of the image lazy.
 	not_null<crl::object_on_queue<EmojiImageLoader>*> _loader;
-	IsolatedEmoji _emoji;
+	EmojiPtr _emoji = nullptr;
 	QImage _data;
 	QByteArray _format;
 	QByteArray _bytes;
@@ -110,11 +105,11 @@ private:
 };
 
 ImageSource::ImageSource(
-	const IsolatedEmoji &emoji,
+	EmojiPtr emoji,
 	not_null<crl::object_on_queue<EmojiImageLoader>*> loader)
 : _loader(loader)
 , _emoji(emoji)
-, _size(CalculateSize(emoji)) {
+, _size(SingleSize()) {
 }
 
 void ImageSource::load(Data::FileOrigin origin) {
@@ -256,31 +251,54 @@ EmojiImageLoader::EmojiImageLoader(
 , _unloadTimer(_weak.runner(), [=] { _images->clear(); }) {
 }
 
-QImage EmojiImageLoader::prepare(const IsolatedEmoji &emoji) {
+QImage EmojiImageLoader::prepare(EmojiPtr emoji) {
 	Expects(_images.has_value());
 
 	_images->ensureLoaded();
-	auto result = QImage(
-		CalculateSize(emoji),
-		QImage::Format_ARGB32_Premultiplied);
 	const auto factor = cIntRetinaFactor();
+	const auto side = st::largeEmojiSize + 2 * st::largeEmojiOutline;
+	auto tinted = QImage(
+		QSize(st::largeEmojiSize, st::largeEmojiSize) * factor,
+		QImage::Format_ARGB32_Premultiplied);
+	tinted.fill(Qt::white);
+	{
+		QPainter p(&tinted);
+		p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
+		_images->draw(
+			p,
+			emoji,
+			st::largeEmojiSize * factor,
+			0,
+			0);
+	}
+	auto result = QImage(
+		QSize(side, side) * factor,
+		QImage::Format_ARGB32_Premultiplied);
 	result.fill(Qt::transparent);
 	{
 		QPainter p(&result);
-		auto x = st::largeEmojiOutline;
-		const auto y = st::largeEmojiOutline;
-		for (const auto &single : emoji.items) {
-			if (!single) {
-				break;
+		const auto delta = st::largeEmojiOutline * factor;
+		const auto shifts = std::array<QPoint, 8>{ {
+			{ -1, -1 },
+			{ 0, -1 },
+			{ 1, -1 },
+			{ -1, 0 },
+			{ 1, 0 },
+			{ -1, 1 },
+			{ 0, 1 },
+			{ 1, 1 },
+		} };
+		for (const auto &shift : shifts) {
+			for (auto i = 0; i != delta; ++i) {
+				p.drawImage(QPoint(delta, delta) + shift * (i + 1), tinted);
 			}
-			_images->draw(
-				p,
-				single,
-				st::largeEmojiSize * factor,
-				x * factor,
-				y * factor);
-			x += st::largeEmojiSize + st::largeEmojiSkip;
 		}
+		_images->draw(
+			p,
+			emoji,
+			st::largeEmojiSize * factor,
+			delta,
+			delta);
 	}
 	_unloadTimer.callOnce(kUnloadTimeout);
 	return result;
@@ -356,7 +374,7 @@ DocumentData *EmojiPack::stickerForEmoji(const IsolatedEmoji &emoji) {
 	return (i != end(_map)) ? i->second.get() : nullptr;
 }
 
-std::shared_ptr<Image> EmojiPack::image(const IsolatedEmoji &emoji) {
+std::shared_ptr<Image> EmojiPack::image(EmojiPtr emoji) {
 	const auto i = _images.emplace(emoji, std::weak_ptr<Image>()).first;
 	if (const auto result = i->second.lock()) {
 		return result;

Telegram/SourceFiles/chat_helpers/stickers_emoji_pack.h

@@ -40,7 +40,7 @@ public:
 	void remove(not_null<const HistoryItem*> item);
 
 	[[nodiscard]] DocumentData *stickerForEmoji(const IsolatedEmoji &emoji);
-	[[nodiscard]] std::shared_ptr<Image> image(const IsolatedEmoji &emoji);
+	[[nodiscard]] std::shared_ptr<Image> image(EmojiPtr emoji);
 
 private:
 	class ImageLoader;
@@ -62,7 +62,7 @@ private:
 	base::flat_map<
 		IsolatedEmoji,
 		base::flat_set<not_null<HistoryItem*>>> _items;
-	base::flat_map<IsolatedEmoji, std::weak_ptr<Image>> _images;
+	base::flat_map<EmojiPtr, std::weak_ptr<Image>> _images;
 	mtpRequestId _requestId = 0;
 
 	crl::object_on_queue<details::EmojiImageLoader> _imageLoader;

Telegram/SourceFiles/history/view/media/history_view_large_emoji.cpp

@@ -20,49 +20,70 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 namespace HistoryView {
 namespace {
 
-std::shared_ptr<Image> ResolveImage(
-		not_null<Main::Session*> session,
-		const Ui::Text::IsolatedEmoji &emoji) {
-	return session->emojiStickersPack().image(emoji);
+auto ResolveImages(
+	not_null<Main::Session*> session,
+	const Ui::Text::IsolatedEmoji &emoji)
+-> std::array<std::shared_ptr<Image>, Ui::Text::kIsolatedEmojiLimit> {
+	const auto single = [&](EmojiPtr emoji) {
+		return emoji ? session->emojiStickersPack().image(emoji) : nullptr;
+	};
+	return { {
+		single(emoji.items[0]),
+		single(emoji.items[1]),
+		single(emoji.items[2]) } };
+}
+
+auto NonEmpty(const std::array<std::shared_ptr<Image>, Ui::Text::kIsolatedEmojiLimit> &images) {
+	using namespace rpl::mappers;
+
+	return images | ranges::view::filter(_1 != nullptr);
 }
 
 } // namespace
 
 LargeEmoji::LargeEmoji(
 	not_null<Element*> parent,
-	Ui::Text::IsolatedEmoji emoji)
+	const Ui::Text::IsolatedEmoji &emoji)
 : _parent(parent)
-, _emoji(emoji)
-, _image(ResolveImage(&parent->data()->history()->session(), emoji)) {
+, _images(ResolveImages(&parent->data()->history()->session(), emoji)) {
 }
 
 QSize LargeEmoji::size() {
-	const auto size = _image->size() / cIntRetinaFactor();
+	using namespace rpl::mappers;
+
+	const auto count = ranges::distance(NonEmpty(_images));
+	Assert(count > 0);
+
+	const auto single = _images[0]->size() / cIntRetinaFactor();
+	const auto skip = st::largeEmojiSkip - 2 * st::largeEmojiOutline;
+	const auto inner = count * single.width() + (count - 1) * skip;
 	const auto &padding = st::largeEmojiPadding;
 	_size = QSize(
-		padding.left() + size.width() + padding.right(),
-		padding.top() + size.height() + padding.bottom());
+		padding.left() + inner + padding.right(),
+		padding.top() + single.height() + padding.bottom());
 	return _size;
 }
 
 void LargeEmoji::draw(Painter &p, const QRect &r, bool selected) {
-	_image->load(Data::FileOrigin());
-	if (!_image->loaded()) {
-		return;
-	}
+	auto &&images = NonEmpty(_images);
 	const auto &padding = st::largeEmojiPadding;
+	auto x = r.x() + (r.width() - _size.width()) / 2 + padding.left();
+	const auto y = r.y() + (r.height() - _size.height()) / 2 + padding.top();
 	const auto o = Data::FileOrigin();
-	const auto w = _size.width() - padding.left() - padding.right();
-	const auto h = _size.height() - padding.top() - padding.bottom();
-	const auto &c = st::msgStickerOverlay;
-	const auto pixmap = selected
-		? _image->pixColored(o, c, w, h)
-		: _image->pix(o, w, h);
-	p.drawPixmap(
-		QPoint(
-			r.x() + (r.width() - _size.width()) / 2,
-			r.y() + (r.height() - _size.height()) / 2),
-		pixmap);
+	const auto skip = st::largeEmojiSkip - 2 * st::largeEmojiOutline;
+	for (const auto &image : images) {
+		image->load(Data::FileOrigin());
+		const auto w = image->width() / cIntRetinaFactor();
+		if (image->loaded()) {
+			const auto h = image->height() / cIntRetinaFactor();
+			const auto &c = st::msgStickerOverlay;
+			const auto pixmap = selected
+				? image->pixColored(o, c, w, h)
+				: image->pix(o, w, h);
+			p.drawPixmap(x, y, pixmap);
+		}
+		x += w + skip;
+	}
 }
 
 } // namespace HistoryView

Telegram/SourceFiles/history/view/media/history_view_large_emoji.h

@@ -24,15 +24,16 @@ class LargeEmoji final : public UnwrappedMedia::Content {
 public:
 	LargeEmoji(
 		not_null<Element*> parent,
-		Ui::Text::IsolatedEmoji emoji);
+		const Ui::Text::IsolatedEmoji &emoji);
 
 	QSize size() override;
 	void draw(Painter &p, const QRect &r, bool selected) override;
 
 private:
 	const not_null<Element*> _parent;
-	const Ui::Text::IsolatedEmoji _emoji;
-	std::shared_ptr<Image> _image;
+	const std::array<
+		std::shared_ptr<Image>,
+		Ui::Text::kIsolatedEmojiLimit> _images;
 	QSize _size;
 
 };