From c93b638ac0bd6c1a2fc06ffce5fd4b2f84ad89bf Mon Sep 17 00:00:00 2001
From: 23rd <23rd@vivaldi.net>
Date: Thu, 2 Apr 2026 16:50:51 +0300
Subject: [PATCH] [thanos] Added debug logging to effect capture and render
 pipeline.

---
 Telegram/SourceFiles/history/history_inner_widget.cpp  | 10 ++++++++--
 Telegram/SourceFiles/ui/effects/thanos_effect.cpp      |  7 ++++++-
 .../SourceFiles/ui/effects/thanos_effect_renderer.cpp  |  4 ++++
 3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/Telegram/SourceFiles/history/history_inner_widget.cpp b/Telegram/SourceFiles/history/history_inner_widget.cpp
index 5e9bfa3780..84260f5f89 100644
--- a/Telegram/SourceFiles/history/history_inner_widget.cpp
+++ b/Telegram/SourceFiles/history/history_inner_widget.cpp
@@ -4208,11 +4208,17 @@ void HistoryInner::captureViewForThanosEffect(
 		auto context = preparePaintContext(clip);
 		context.clip = clip;
 		context.outbg = view->hasOutLayout();
-		context.translate(0, -top);
-		p.translate(0, top);
 		view->draw(p, context);
 	}
 
+	LOG(("ThanosEffect: captured view %1x%2, screenTop=%3, "
+		"image null=%4, allTransparent=%5")
+		.arg(viewWidth)
+		.arg(viewHeight)
+		.arg(screenTop)
+		.arg(image.isNull())
+		.arg(image.pixelColor(viewWidth / 2, viewHeight / 2).alpha() == 0));
+
 	if (!_thanosEffect) {
 		_thanosEffect = std::make_unique<Ui::ThanosEffect>(
 			_scroll.get());
diff --git a/Telegram/SourceFiles/ui/effects/thanos_effect.cpp b/Telegram/SourceFiles/ui/effects/thanos_effect.cpp
index 6f4041c061..0b795f493e 100644
--- a/Telegram/SourceFiles/ui/effects/thanos_effect.cpp
+++ b/Telegram/SourceFiles/ui/effects/thanos_effect.cpp
@@ -71,10 +71,15 @@ void ThanosEffect::ensureSurface() {
 
 void ThanosEffect::showSurface() {
 	if (const auto w = _surface ? _surface->rpWidget() : nullptr) {
-		w->setGeometry(_parent->rect());
+		const auto r = _parent->rect();
+		LOG(("ThanosEffect: showSurface, parent rect=%1,%2 %3x%4")
+			.arg(r.x()).arg(r.y()).arg(r.width()).arg(r.height()));
+		w->setGeometry(r);
 		w->show();
 		w->raise();
 		startUpdateTimer();
+	} else {
+		LOG(("ThanosEffect: showSurface FAILED, no widget"));
 	}
 }
 
diff --git a/Telegram/SourceFiles/ui/effects/thanos_effect_renderer.cpp b/Telegram/SourceFiles/ui/effects/thanos_effect_renderer.cpp
index 9bf24c1b70..301507153f 100644
--- a/Telegram/SourceFiles/ui/effects/thanos_effect_renderer.cpp
+++ b/Telegram/SourceFiles/ui/effects/thanos_effect_renderer.cpp
@@ -257,6 +257,10 @@ void ThanosEffectRenderer::render(
 		return;
 	}
 
+	LOG(("ThanosEffect render: %1 items, phase=%2")
+		.arg(_items.size())
+		.arg(_items.front().phase));
+
 	const auto pixelSize = rt->pixelSize();
 	const auto factor = style::DevicePixelRatio();
 	const auto viewW = float(pixelSize.width()) / factor;