From f7fa36ca1daf0eec32fc3880852b96a7eee036ef Mon Sep 17 00:00:00 2001
From: 23rd <23rd@vivaldi.net>
Date: Fri, 5 Feb 2021 10:08:20 +0300
Subject: [PATCH] Added photo painting to PhotoEditorContent.

---
 Telegram/SourceFiles/editor/photo_editor.cpp  |  8 +++++-
 Telegram/SourceFiles/editor/photo_editor.h    |  5 ++++
 .../editor/photo_editor_content.cpp           | 27 +++++++++++++++++++
 .../SourceFiles/editor/photo_editor_content.h |  2 ++
 4 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/Telegram/SourceFiles/editor/photo_editor.cpp b/Telegram/SourceFiles/editor/photo_editor.cpp
index 0030351ab..5fde53f30 100644
--- a/Telegram/SourceFiles/editor/photo_editor.cpp
+++ b/Telegram/SourceFiles/editor/photo_editor.cpp
@@ -15,7 +15,13 @@ namespace Editor {
 PhotoEditor::PhotoEditor(
 	not_null<Ui::RpWidget*> parent,
 	std::shared_ptr<QPixmap> photo)
-: RpWidget(parent) {
+: RpWidget(parent)
+, _content(base::make_unique_q<PhotoEditorContent>(this, photo))
+, _controls(base::make_unique_q<PhotoEditorControls>(this)) {
+	sizeValue(
+	) | rpl::start_with_next([=](const QSize &size) {
+		_content->resize(size);
+	}, lifetime());
 }
 
 } // namespace Editor
diff --git a/Telegram/SourceFiles/editor/photo_editor.h b/Telegram/SourceFiles/editor/photo_editor.h
index 82b186893..7cd0f04b5 100644
--- a/Telegram/SourceFiles/editor/photo_editor.h
+++ b/Telegram/SourceFiles/editor/photo_editor.h
@@ -9,6 +9,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "ui/rp_widget.h"
 
+#include "base/unique_qptr.h"
+
 namespace Editor {
 
 class PhotoEditorContent;
@@ -22,6 +24,9 @@ public:
 
 private:
 
+	base::unique_qptr<PhotoEditorContent> _content;
+	base::unique_qptr<PhotoEditorControls> _controls;
+
 };
 
 } // namespace Editor
diff --git a/Telegram/SourceFiles/editor/photo_editor_content.cpp b/Telegram/SourceFiles/editor/photo_editor_content.cpp
index dd57403b0..e63bd0a92 100644
--- a/Telegram/SourceFiles/editor/photo_editor_content.cpp
+++ b/Telegram/SourceFiles/editor/photo_editor_content.cpp
@@ -13,6 +13,33 @@ PhotoEditorContent::PhotoEditorContent(
 	not_null<Ui::RpWidget*> parent,
 	std::shared_ptr<QPixmap> photo)
 : RpWidget(parent) {
+
+	sizeValue(
+	) | rpl::start_with_next([=](const QSize &size) {
+		const auto imageSize = [&] {
+			const auto originalSize = photo->size() / cIntRetinaFactor();
+			if ((originalSize.width() > size.width())
+				&& (originalSize.height() > size.height())) {
+				return originalSize.scaled(
+					size,
+					Qt::KeepAspectRatio);
+			}
+			return originalSize;
+		}();
+		_imageRect = QRect(
+			QPoint(
+				(size.width() - imageSize.width()) / 2,
+				(size.height() - imageSize.height()) / 2),
+			imageSize);
+	}, lifetime());
+
+	paintRequest(
+	) | rpl::start_with_next([=](const QRect &clip) {
+		Painter p(this);
+
+		p.fillRect(clip, Qt::transparent);
+		p.drawPixmap(_imageRect, *photo, photo->rect());
+	}, lifetime());
 }
 
 } // namespace Editor
diff --git a/Telegram/SourceFiles/editor/photo_editor_content.h b/Telegram/SourceFiles/editor/photo_editor_content.h
index 80ce4678d..e9424c3b6 100644
--- a/Telegram/SourceFiles/editor/photo_editor_content.h
+++ b/Telegram/SourceFiles/editor/photo_editor_content.h
@@ -19,6 +19,8 @@ public:
 
 private:
 
+	QRect _imageRect;
+
 };
 
 } // namespace Editor