Support selecting Webm stickers.

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

@@ -391,7 +391,10 @@ void Gif::draw(Painter &p, const PaintContext &context) const {
 		auto request = ::Media::Streaming::FrameRequest();
 		request.outer = QSize(usew, painth) * cIntRetinaFactor();
 		request.resize = QSize(_thumbw, _thumbh) * cIntRetinaFactor();
-		request.keepAlpha = !isRound && unwrapped;
+		request.keepAlpha = (sticker != nullptr);
+		if (sticker && context.selected()) {
+			request.colored = context.st->msgStickerOverlay()->c;
+		}
 		request.corners = roundCorners;
 		request.radius = roundRadius;
 		if (!activeRoundPlaying && activeOwnPlaying->instance.playerLocked()) {
@@ -442,8 +445,13 @@ void Gif::draw(Painter &p, const PaintContext &context) const {
 		ensureDataMediaCreated();
 		const auto size = QSize(_thumbw, _thumbh);
 		const auto args = Images::PrepareArgs{
-			.options = Images::RoundOptions(roundRadius, roundCorners),
-			.outer = QSize(usew, painth),
+			.colored = ((sticker && context.selected())
+				? &context.st->msgStickerOverlay()
+				: nullptr),
+			.options = (sticker
+				? Images::Option::TransparentBackground
+				: Images::RoundOptions(roundRadius, roundCorners)),
+			.outer = sticker ? QSize() : QSize(usew, painth),
 		};
 		if (const auto good = _dataMedia->goodThumbnail()) {
 			p.drawPixmap(rthumb.topLeft(), good->pixSingle(size, args));

Telegram/SourceFiles/media/streaming/media_streaming_common.h

@@ -59,6 +59,7 @@ struct VideoInformation {
 	QSize size;
 	QImage cover;
 	int rotation = 0;
+	bool alpha = false;
 };
 
 struct AudioInformation {
@@ -120,6 +121,7 @@ struct FrameRequest {
 	QSize outer;
 	ImageRoundRadius radius = ImageRoundRadius();
 	RectParts corners = RectPart::AllCorners;
+	QColor colored = QColor(0, 0, 0, 0);
 	bool requireARGB32 = true;
 	bool keepAlpha = false;
 	bool strict = true;
@@ -139,6 +141,7 @@ struct FrameRequest {
 			&& (outer == other.outer)
 			&& (radius == other.radius)
 			&& (corners == other.corners)
+			&& (colored == other.colored)
 			&& (keepAlpha == other.keepAlpha)
 			&& (requireARGB32 == other.requireARGB32);
 	}
@@ -149,7 +152,8 @@ struct FrameRequest {
 	[[nodiscard]] bool goodFor(const FrameRequest &other) const {
 		return (requireARGB32 == other.requireARGB32)
 			&& (keepAlpha == other.keepAlpha)
-			&& ((*this == other) || (strict && !other.strict));
+			&& (colored == other.colored)
+			&& ((strict && !other.strict) || (*this == other));
 	}
 };
 
@@ -177,6 +181,7 @@ struct FrameWithInfo {
 	FrameYUV420 *yuv420 = nullptr;
 	FrameFormat format = FrameFormat::None;
 	int index = -1;
+	bool alpha = false;
 };
 
 } // namespace Streaming

Telegram/SourceFiles/media/streaming/media_streaming_player.cpp

@@ -63,6 +63,7 @@ void SaveValidVideoInformation(
 	to.size = from.size;
 	to.cover = std::move(from.cover);
 	to.rotation = from.rotation;
+	to.alpha = from.alpha;
 }
 
 void SaveValidStartInformation(Information &to, Information &&from) {

Telegram/SourceFiles/media/streaming/media_streaming_utility.cpp

@@ -92,7 +92,9 @@ bool GoodForRequest(
 		bool hasAlpha,
 		int rotation,
 		const FrameRequest &request) {
-	if (image.isNull() || (hasAlpha && !request.keepAlpha)) {
+	if (image.isNull()
+		|| (hasAlpha && !request.keepAlpha)
+		|| request.colored.alpha() != 0) {
 		return false;
 	} else if (request.resize.isEmpty()) {
 		return true;
@@ -321,6 +323,9 @@ QImage PrepareByRequest(
 	p.end();
 
 	ApplyFrameRounding(storage, request);
+	if (request.colored.alpha() != 0) {
+		storage = Images::Colored(std::move(storage), request.colored);
+	}
 	return storage;
 }
 

Telegram/SourceFiles/media/streaming/media_streaming_video_track.cpp

@@ -661,6 +661,7 @@ void VideoTrackObject::callReady() {
 	}
 	data.cover = frame->original;
 	data.rotation = _stream.rotation;
+	data.alpha = frame->alpha;
 	data.state.duration = _stream.duration;
 	data.state.position = _syncTimePoint.trackTime;
 	data.state.receivedTill = _readTillEnd
@@ -1166,6 +1167,7 @@ FrameWithInfo VideoTrack::frameWithInfo(const Instance *instance) {
 		.yuv420 = &data.frame->yuv420,
 		.format = data.frame->format,
 		.index = data.index,
+		.alpha = data.frame->alpha,
 	};
 }