From 38546c701a28fbdb4d425e05613f95823af58cfb Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Fri, 7 Aug 2020 18:33:34 +0400
Subject: [PATCH] Round outgoing video preview.

---
 Telegram/SourceFiles/calls/calls.style        |  2 +-
 .../SourceFiles/calls/calls_video_bubble.cpp  | 60 +++++++++++++++++--
 .../SourceFiles/calls/calls_video_bubble.h    |  3 +-
 3 files changed, 59 insertions(+), 6 deletions(-)

diff --git a/Telegram/SourceFiles/calls/calls.style b/Telegram/SourceFiles/calls/calls.style
index 3124fb61e9..075662184f 100644
--- a/Telegram/SourceFiles/calls/calls.style
+++ b/Telegram/SourceFiles/calls/calls.style
@@ -34,7 +34,7 @@ callShadow: Shadow {
 
 callWidthMin: 380px;
 callHeightMin: 440px;
-callWidth: 960px;
+callWidth: 720px;
 callHeight: 540px;
 
 callBottomControlsHeight: 85px;
diff --git a/Telegram/SourceFiles/calls/calls_video_bubble.cpp b/Telegram/SourceFiles/calls/calls_video_bubble.cpp
index 7d66a6420b..35d50e5598 100644
--- a/Telegram/SourceFiles/calls/calls_video_bubble.cpp
+++ b/Telegram/SourceFiles/calls/calls_video_bubble.cpp
@@ -9,7 +9,10 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "webrtc/webrtc_video_track.h"
 #include "ui/image/image_prepare.h"
+#include "ui/widgets/shadow.h"
 #include "styles/style_calls.h"
+#include "styles/style_widgets.h"
+#include "styles/style_layers.h"
 
 namespace Calls {
 
@@ -110,11 +113,58 @@ void VideoBubble::applySizeConstraints(QSize min, QSize max) {
 void VideoBubble::paint() {
 	Painter p(&_content);
 
-	auto hq = PainterHighQualityEnabler(p);
-	p.drawImage(_content.rect(), _track->frame({}));
+	prepareFrame();
+	if (!_frame.isNull()) {
+		const auto padding = st::boxRoundShadow.extend;
+		const auto inner = _content.rect().marginsRemoved(padding);
+		Ui::Shadow::paint(p, inner, _content.width(), st::boxRoundShadow);
+		p.drawImage(
+			inner,
+			_frame,
+			QRect(QPoint(), inner.size() * cIntRetinaFactor()));
+	}
 	_track->markFrameShown();
 }
 
+void VideoBubble::prepareFrame() {
+	const auto original = _track->frameSize();
+	if (original.isEmpty()) {
+		_frame = QImage();
+		return;
+	}
+	const auto padding = st::boxRoundShadow.extend;
+	const auto size = _content.rect().marginsRemoved(padding).size()
+		* cIntRetinaFactor();
+
+	// Should we check 'original' and 'size' aspect ratios?..
+	const auto request = webrtc::FrameRequest{
+		.resize = size,
+		.outer = size,
+	};
+	const auto frame = _track->frame(request);
+	if (_frame.width() < size.width() || _frame.height() < size.height()) {
+		_frame = QImage(
+			_max * cIntRetinaFactor(),
+			QImage::Format_ARGB32_Premultiplied);
+	}
+	Assert(_frame.width() >= frame.width()
+		&& _frame.height() >= frame.height());
+	const auto toPerLine = _frame.bytesPerLine();
+	const auto fromPerLine = frame.bytesPerLine();
+	const auto lineSize = frame.width() * 4;
+	auto to = _frame.bits();
+	auto from = frame.bits();
+	const auto till = from + frame.height() * fromPerLine;
+	for (; from != till; from += fromPerLine, to += toPerLine) {
+		memcpy(to, from, lineSize);
+	}
+	Images::prepareRound(
+		_frame,
+		ImageRoundRadius::Large,
+		RectPart::AllCorners,
+		QRect(QPoint(), size));
+}
+
 void VideoBubble::setState(webrtc::VideoState state) {
 	if (state == webrtc::VideoState::Paused) {
 		using namespace Images;
@@ -161,7 +211,7 @@ void VideoBubble::setInnerSize(QSize size) {
 	}
 	_geometryDirty = false;
 	_size = size;
-	_content.setGeometry(QRect([&] {
+	const auto topLeft = [&] {
 		switch (_corner) {
 		case RectPart::None:
 			return _boundingRect.topLeft() + QPoint(
@@ -183,7 +233,9 @@ void VideoBubble::setInnerSize(QSize size) {
 				_boundingRect.y() + _boundingRect.height() - size.height());
 		}
 		Unexpected("Corner value in VideoBubble::setInnerSize.");
-	}(), size));
+	}();
+	const auto inner = QRect(topLeft, size);
+	_content.setGeometry(inner.marginsAdded(st::boxRoundShadow.extend));
 }
 
 void VideoBubble::updateVisibility() {
diff --git a/Telegram/SourceFiles/calls/calls_video_bubble.h b/Telegram/SourceFiles/calls/calls_video_bubble.h
index b9d99d3739..a8682c6e8b 100644
--- a/Telegram/SourceFiles/calls/calls_video_bubble.h
+++ b/Telegram/SourceFiles/calls/calls_video_bubble.h
@@ -46,11 +46,12 @@ private:
 	void updateSizeToFrame(QSize frame);
 	void updateVisibility();
 	void setInnerSize(QSize size);
+	void prepareFrame();
 
 	Ui::RpWidget _content;
 	const not_null<webrtc::VideoTrack*> _track;
 	webrtc::VideoState _state = webrtc::VideoState();
-	QImage _pausedFrame;
+	QImage _frame, _pausedFrame;
 	QSize _min, _max, _size, _lastDraggableSize, _lastFrameSize;
 	QRect _boundingRect;
 	DragMode _dragMode = DragMode::None;