Insert gift pattern symbols in background.

john-preston · john-preston · commit e792088cebe2 · 2025-08-31T20:53:12.000+04:00
diff --git a/Telegram/SourceFiles/ui/chat/chat_theme.cpp b/Telegram/SourceFiles/ui/chat/chat_theme.cpp
@@ -7,12 +7,15 @@ For license and copyright information please follow this link:
 */
 #include "ui/chat/chat_theme.h"
 
-#include "ui/image/image_prepare.h"
+#include "ui/color_contrast.h"
+#include "ui/emoji_config.h"
+#include "ui/painter.h"
 #include "ui/power_saving.h"
 #include "ui/ui_utility.h"
 #include "ui/chat/message_bubble.h"
 #include "ui/chat/chat_style.h"
-#include "ui/color_contrast.h"
+#include "ui/image/image_prepare.h"
+#include "ui/text/text_custom_emoji.h"
 #include "ui/style/style_core_palette.h"
 #include "ui/style/style_palette_colorizer.h"
 
@@ -53,6 +56,14 @@ constexpr auto kMinAcceptableContrast = 1.14;// 4.5;
 	return (doubled % 2) ? 0.5 : 1.;
 }
 
+[[nodiscard]] int RotationForSymbol(const QRectF &symbol) {
+	const auto a = int(base::SafeRound(symbol.x() * 255));
+	const auto b = int(base::SafeRound(symbol.y() * 255));
+	const auto value = uint16((uint16(a) << 8) | uint16(b));
+	const auto shuffled = uint16(value << 5) | uint16(value >> 3);
+	return (shuffled % 90) - 45;
+}
+
 [[nodiscard]] CacheBackgroundResult CacheBackgroundByRequest(
 		const CacheBackgroundRequest &request) {
 	Expects(!request.area.isEmpty());
@@ -83,14 +94,17 @@ constexpr auto kMinAcceptableContrast = 1.14;// 4.5;
 			QPainter p(&result);
 			if (!gradient.isNull()) {
 				if (request.background.patternOpacity >= 0.) {
-					p.setCompositionMode(QPainter::CompositionMode_SoftLight);
+					p.setCompositionMode(
+						QPainter::CompositionMode_SoftLight);
 					p.setOpacity(request.background.patternOpacity);
 				} else {
 					p.setCompositionMode(
 						QPainter::CompositionMode_DestinationIn);
 				}
 			}
-			const auto tiled = request.background.isPattern
+			const auto hasGiftSymbols = request.background.isPattern
+				&& !request.background.giftSymbols.empty();
+			auto tiled = request.background.isPattern
 				? request.background.prepared.scaled(
 					request.area.height() * ratio,
 					request.area.height() * ratio,
@@ -99,6 +113,31 @@ constexpr auto kMinAcceptableContrast = 1.14;// 4.5;
 				: request.background.preparedForTiled;
 			const auto w = tiled.width() / float(ratio);
 			const auto h = tiled.height() / float(ratio);
+
+			const auto &giftSymbols = request.background.giftSymbols;
+			const auto &giftSymbolFrame = request.background.giftSymbolFrame;
+			const auto giftSymbolSize = giftSymbolFrame.size() / ratio;
+			if (hasGiftSymbols) {
+				auto q = QPainter(&tiled);
+				auto hq = PainterHighQualityEnabler(q);
+				q.setOpacity(0.8);
+				for (const auto &symbol : giftSymbols) {
+					const auto rect = QRectF(
+						symbol.x() * w,
+						symbol.y() * h,
+						symbol.width() * w,
+						symbol.height() * h);
+					q.save();
+					q.translate(rect.center());
+					q.scale(
+						rect.width() / giftSymbolSize.width(),
+						rect.height() / giftSymbolSize.height());
+					q.rotate(RotationForSymbol(symbol));
+					q.translate(-rect.center());
+					q.drawImage(rect.topLeft(), giftSymbolFrame);
+					q.restore();
+				}
+			}
 			const auto cx = int(std::ceil(request.area.width() / w));
 			const auto cy = int(std::ceil(request.area.height() / h));
 			const auto rows = cy;
@@ -111,7 +150,8 @@ constexpr auto kMinAcceptableContrast = 1.14;// 4.5;
 			const auto useshift = xshift / float(ratio);
 			for (auto y = 0; y != rows; ++y) {
 				for (auto x = 0; x != cols; ++x) {
-					p.drawImage(QPointF(useshift + x * w, y * h), tiled);
+					const auto position = QPointF(useshift + x * w, y * h);
+					p.drawImage(position, tiled);
 				}
 			}
 			if (!gradient.isNull()
@@ -1093,7 +1133,7 @@ ChatThemeBackground PrepareBackgroundImage(
 			data.path,
 			data.bytes,
 			data.gzipSvg,
-			data.findGiftSymbols)
+			!data.giftSymbolFrame.isNull())
 		: BackgroundImageFields();
 	auto prepared = needBackground
 		? PreprocessBackgroundImage(std::move(read.image))
@@ -1143,10 +1183,32 @@ ChatThemeBackground PrepareBackgroundImage(
 			: std::make_optional(data.colors.front())),
 		.colors = data.colors,
 		.giftSymbols = std::move(read.giftSymbols),
+		.giftSymbolFrame = data.giftSymbolFrame,
 		.patternOpacity = data.patternOpacity,
 		.gradientRotation = data.generateGradient ? data.gradientRotation : 0,
 		.isPattern = data.isPattern,
 	};
 }
 
+[[nodiscard]] QImage PrepareGiftSymbol(
+		const std::unique_ptr<Text::CustomEmoji> &emoji) {
+	if (!emoji || !emoji->ready()) {
+		return QImage();
+	}
+	const auto ratio = style::DevicePixelRatio();
+	const auto size = Ui::Emoji::GetSizeNormal() / ratio;
+	auto result = QImage(
+		2 * QSize(size, size) * ratio,
+		QImage::Format_ARGB32_Premultiplied);
+	result.setDevicePixelRatio(ratio);
+	result.fill(Qt::transparent);
+	auto p = QPainter(&result);
+	const auto shift = (2 * size - (Ui::Emoji::GetSizeLarge() / ratio)) / 2;
+	emoji->paint(p, {
+		.textColor = QColor(0, 0, 0),
+		.position = QPoint(shift, shift),
+	});
+	return result;
+}
+
 } // namespace Window::Theme
diff --git a/Telegram/SourceFiles/ui/chat/chat_theme.h b/Telegram/SourceFiles/ui/chat/chat_theme.h
@@ -16,6 +16,10 @@ class palette;
 struct colorizer;
 } // namespace style
 
+namespace Ui::Text {
+class CustomEmoji;
+} // namespace Ui::Text
+
 namespace Ui {
 
 class ChatStyle;
@@ -30,6 +34,7 @@ struct ChatThemeBackground {
 	std::optional<QColor> colorForFill;
 	std::vector<QColor> colors;
 	std::vector<QRectF> giftSymbols;
+	QImage giftSymbolFrame;
 	float64 patternOpacity = 1.;
 	int gradientRotation = 0;
 	bool isPattern = false;
@@ -47,6 +52,7 @@ struct ChatThemeBackgroundData {
 	QString key;
 	QString path;
 	QByteArray bytes;
+	QImage giftSymbolFrame;
 	bool gzipSvg = false;
 	std::vector<QColor> colors;
 	bool isPattern = false;
@@ -55,7 +61,6 @@ struct ChatThemeBackgroundData {
 	bool isBlurred = false;
 	bool forDarkMode = false;
 	bool generateGradient = false;
-	bool findGiftSymbols = false;
 	int gradientRotation = 0;
 };
 
@@ -269,5 +274,7 @@ struct BackgroundImageFields {
 	int rotation);
 [[nodiscard]] ChatThemeBackground PrepareBackgroundImage(
 	const ChatThemeBackgroundData &data);
+[[nodiscard]] QImage PrepareGiftSymbol(
+	const std::unique_ptr<Text::CustomEmoji> &emoji);
 
 } // namespace Ui
diff --git a/Telegram/SourceFiles/window/window_session_controller.cpp b/Telegram/SourceFiles/window/window_session_controller.cpp
@@ -1505,8 +1505,8 @@ struct SessionController::CachedThemeKey {
 struct SessionController::CachedTheme {
 	std::weak_ptr<Ui::ChatTheme> theme;
 	std::shared_ptr<Data::DocumentMedia> media;
+	std::unique_ptr<Ui::Text::CustomEmoji> giftSymbol;
 	Data::WallPaper paper;
-	bool findGiftSymbols = false;
 	bool basedOnDark = false;
 	bool caching = false;
 	rpl::lifetime lifetime;
@@ -3296,13 +3296,20 @@ void SessionController::cacheChatTheme(
 	const auto document = use.document();
 	const auto media = document ? document->createMediaView() : nullptr;
 	const auto findGiftSymbols = (data.unique != nullptr);
+	auto giftSymbol = findGiftSymbols
+		? session().data().customEmojiManager().create(
+			data.unique->pattern.document,
+			crl::guard(this, [=] { _giftSymbolLoaded.fire({}); }),
+			Data::CustomEmojiSizeTag::Large)
+		: nullptr;
+	const auto giftSymbolReady = !giftSymbol || giftSymbol->ready();
 	use.loadDocument();
 	auto &theme = [&]() -> CachedTheme& {
 		const auto i = _customChatThemes.find(key);
 		if (i != end(_customChatThemes)) {
 			i->second.media = media;
+			i->second.giftSymbol = std::move(giftSymbol);
 			i->second.paper = use;
-			i->second.findGiftSymbols = findGiftSymbols;
 			i->second.basedOnDark = dark;
 			i->second.caching = true;
 			return i->second;
@@ -3311,8 +3318,8 @@ void SessionController::cacheChatTheme(
 			key,
 			CachedTheme{
 				.media = media,
+				.giftSymbol = std::move(giftSymbol),
 				.paper = use,
-				.findGiftSymbols = findGiftSymbols,
 				.basedOnDark = dark,
 				.caching = true,
 			}).first->second;
@@ -3341,6 +3348,9 @@ void SessionController::cacheChatTheme(
 	});
 	if (media && media->loaded(true)) {
 		theme.media = nullptr;
+		if (giftSymbolReady) {
+			theme.giftSymbol = nullptr;
+		}
 	}
 }
 
@@ -3358,15 +3368,25 @@ void SessionController::cacheChatThemeDone(
 	}
 	i->second.caching = false;
 	i->second.theme = result;
-	if (i->second.media) {
-		if (i->second.media->loaded(true)) {
+	const auto media = i->second.media.get();
+	const auto giftSymbol = i->second.giftSymbol.get();
+	if (media || giftSymbol) {
+		if ((!media || media->loaded(true))
+			&& (!giftSymbol || giftSymbol->ready())) {
 			updateCustomThemeBackground(i->second);
 		} else {
-			session().downloaderTaskFinished(
+			rpl::merge(
+				session().downloaderTaskFinished(),
+				((giftSymbol && !giftSymbol->ready())
+					? (_giftSymbolLoaded.events() | rpl::type_erased())
+					: rpl::never<rpl::empty_value>())
 			) | rpl::filter([=] {
 				const auto i = _customChatThemes.find(key);
 				Assert(i != end(_customChatThemes));
-				return !i->second.media || i->second.media->loaded(true);
+				const auto media = i->second.media.get();
+				const auto giftSymbol = i->second.giftSymbol.get();
+				return (!media || media->loaded(true))
+					&& (!giftSymbol || giftSymbol->ready());
 			}) | rpl::start_with_next([=] {
 				const auto i = _customChatThemes.find(key);
 				Assert(i != end(_customChatThemes));
@@ -3381,9 +3401,15 @@ void SessionController::updateCustomThemeBackground(CachedTheme &theme) {
 	const auto guard = gsl::finally([&] {
 		theme.lifetime.destroy();
 		theme.media = nullptr;
+		theme.giftSymbol = nullptr;
 	});
 	const auto strong = theme.theme.lock();
-	if (!theme.media || !strong || !theme.media->loaded(true)) {
+	const auto media = theme.media.get();
+	const auto giftSymbol = theme.giftSymbol.get();
+	if (!strong
+		|| (!media && !giftSymbol)
+		|| (media && !media->loaded(true))
+		|| (giftSymbol && !giftSymbol->ready())) {
 		return;
 	}
 	const auto key = strong->key();
@@ -3424,6 +3450,7 @@ Ui::ChatThemeBackgroundData SessionController::backgroundData(
 		.key = paper.key(),
 		.path = paperPath,
 		.bytes = paperBytes,
+		.giftSymbolFrame = Ui::PrepareGiftSymbol(theme.giftSymbol),
 		.gzipSvg = gzipSvg,
 		.colors = colors,
 		.isPattern = isPattern,
@@ -3432,7 +3459,6 @@ Ui::ChatThemeBackgroundData SessionController::backgroundData(
 		.isBlurred = isBlurred,
 		.forDarkMode = theme.basedOnDark,
 		.generateGradient = generateGradient,
-		.findGiftSymbols = theme.findGiftSymbols,
 		.gradientRotation = gradientRotation,
 	};
 }
diff --git a/Telegram/SourceFiles/window/window_session_controller.h b/Telegram/SourceFiles/window/window_session_controller.h
@@ -799,6 +799,7 @@ class SessionController : public SessionNavigation {
 	const std::shared_ptr<Ui::ChatTheme> _defaultChatTheme;
 	base::flat_map<CachedThemeKey, CachedTheme> _customChatThemes;
 	rpl::event_stream<std::shared_ptr<Ui::ChatTheme>> _cachedThemesStream;
+	rpl::event_stream<> _giftSymbolLoaded;
 	const std::unique_ptr<Ui::ChatStyle> _chatStyle;
 	std::weak_ptr<Ui::ChatTheme> _chatStyleTheme;
 	std::deque<std::shared_ptr<Ui::ChatTheme>> _lastUsedCustomChatThemes;
diff --git a/Telegram/lib_ui b/Telegram/lib_ui
@@ -1 +1 @@
-Subproject commit c9c1f63df8c7d6f8043ca66d8e67cc4fdb84c6c5
+Subproject commit 3710f80536352b009c5ab359210911086ead6b13
