Mirror premium sticker thumbnail / path.

Telegram/SourceFiles/chat_helpers/stickers_lottie.cpp

@@ -235,7 +235,8 @@ bool PaintStickerThumbnailPath(
 		QPainter &p,
 		not_null<Data::DocumentMedia*> media,
 		QRect target,
-		QLinearGradient *gradient) {
+		QLinearGradient *gradient,
+		bool mirrorHorizontal) {
 	const auto &path = media->thumbnailPath();
 	const auto dimensions = media->owner()->dimensions;
 	if (path.isEmpty() || dimensions.isEmpty() || target.isEmpty()) {
@@ -254,6 +255,12 @@ bool PaintStickerThumbnailPath(
 			0);
 		p.setBrush(*gradient);
 	}
+	if (mirrorHorizontal) {
+		const auto c = QPointF(target.width() / 2., target.height() / 2.);
+		p.translate(c);
+		p.scale(-1., 1.);
+		p.translate(-c);
+	}
 	p.scale(
 		target.width() / float64(dimensions.width()),
 		target.height() / float64(dimensions.height()));
@@ -266,14 +273,25 @@ bool PaintStickerThumbnailPath(
 		QPainter &p,
 		not_null<Data::DocumentMedia*> media,
 		QRect target,
-		not_null<Ui::PathShiftGradient*> gradient) {
+		not_null<Ui::PathShiftGradient*> gradient,
+		bool mirrorHorizontal) {
 	return gradient->paint([&](const Ui::PathShiftGradient::Background &bg) {
 		if (const auto color = std::get_if<style::color>(&bg)) {
 			p.setBrush(*color);
-			return PaintStickerThumbnailPath(p, media, target);
+			return PaintStickerThumbnailPath(
+				p,
+				media,
+				target,
+				nullptr,
+				mirrorHorizontal);
 		}
 		const auto gradient = v::get<QLinearGradient*>(bg);
-		return PaintStickerThumbnailPath(p, media, target, gradient);
+		return PaintStickerThumbnailPath(
+			p,
+			media,
+			target,
+			gradient,
+			mirrorHorizontal);
 	});
 }
 

Telegram/SourceFiles/chat_helpers/stickers_lottie.h

@@ -105,13 +105,15 @@ bool PaintStickerThumbnailPath(
 	QPainter &p,
 	not_null<Data::DocumentMedia*> media,
 	QRect target,
-	QLinearGradient *gradient = nullptr);
+	QLinearGradient *gradient = nullptr,
+	bool mirrorHorizontal = false);
 
 bool PaintStickerThumbnailPath(
 	QPainter &p,
 	not_null<Data::DocumentMedia*> media,
 	QRect target,
-	not_null<Ui::PathShiftGradient*> gradient);
+	not_null<Ui::PathShiftGradient*> gradient,
+	bool mirrorHorizontal = false);
 
 [[nodiscard]] QSize ComputeStickerSize(
 	not_null<DocumentData*> document,

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

@@ -180,14 +180,7 @@ void Sticker::paintLottie(
 	if (context.selected() && !_nextLastDiceFrame) {
 		request.colored = context.st->msgStickerOverlay()->c;
 	}
-	const auto premium = _data->isPremiumSticker();
-	if (premium) {
-		const auto rightAligned = _parent->hasOutLayout()
-			&& !_parent->delegate()->elementIsChatWide();
-		if (!rightAligned) {
-			request.mirrorHorizontal = true;
-		}
-	}
+	request.mirrorHorizontal = mirrorHorizontal();
 	const auto frame = _lottie
 		? _lottie->frameInfo(request)
 		: Lottie::Animation::FrameInfo();
@@ -249,11 +242,24 @@ bool Sticker::paintPixmap(
 	if (pixmap.isNull()) {
 		return false;
 	}
-	p.drawPixmap(
-		QPoint(
+	const auto position = QPoint(
 		r.x() + (r.width() - _size.width()) / 2,
-			r.y() + (r.height() - _size.height()) / 2),
-		pixmap);
+		r.y() + (r.height() - _size.height()) / 2);
+	const auto size = pixmap.size() / pixmap.devicePixelRatio();
+	const auto mirror = mirrorHorizontal();
+	if (mirror) {
+		p.save();
+		const auto middle = QPointF(
+			position.x() + size.width() / 2.,
+			position.y() + size.height() / 2.);
+		p.translate(middle);
+		p.scale(-1., 1.);
+		p.translate(-middle);
+	}
+	p.drawPixmap(position, pixmap);
+	if (mirror) {
+		p.restore();
+	}
 	return true;
 }
 
@@ -274,7 +280,8 @@ void Sticker::paintPath(
 		p,
 		_dataMedia.get(),
 		r,
-		pathGradient);
+		pathGradient,
+		mirrorHorizontal());
 }
 
 QPixmap Sticker::paintedPixmap(const PaintContext &context) const {
@@ -301,6 +308,15 @@ QPixmap Sticker::paintedPixmap(const PaintContext &context) const {
 	return QPixmap();
 }
 
+bool Sticker::mirrorHorizontal() const {
+	if (!_data->isPremiumSticker()) {
+		return false;
+	}
+	const auto rightAligned = _parent->hasOutLayout()
+		&& !_parent->delegate()->elementIsChatWide();
+	return !rightAligned;
+}
+
 ClickHandlerPtr Sticker::ShowSetHandler(not_null<DocumentData*> document) {
 	return std::make_shared<LambdaClickHandler>([=](ClickContext context) {
 		const auto my = context.other.value<ClickHandlerContext>();

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

@@ -83,6 +83,7 @@ private:
 	bool paintPixmap(Painter &p, const PaintContext &context, const QRect &r);
 	void paintPath(Painter &p, const PaintContext &context, const QRect &r);
 	[[nodiscard]] QPixmap paintedPixmap(const PaintContext &context) const;
+	[[nodiscard]] bool mirrorHorizontal() const;
 
 	void ensureDataMediaCreated() const;
 	void dataMediaCreated() const;