From a4c1e2793a9600a7c2a4e021a91f1091ba1e5f1d Mon Sep 17 00:00:00 2001
From: YiFang Xiao <yifang.xiao@outlook.com>
Date: Sun, 17 Apr 2022 18:28:01 +0800
Subject: [PATCH] feature:webp auto scale to reduce the size

---
 tiff.cc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tiff.cc b/tiff.cc
index 6b8f3f6a1..c40d5f140 100644
--- a/tiff.cc
+++ b/tiff.cc
@@ -14,6 +14,8 @@
 #endif
 
 #include <QBuffer>
+#include <QApplication>
+#include <QScreen>
 
 namespace GdTiff
 {
@@ -153,7 +155,11 @@ void tiff2img( vector< char > & data, const char * format )
     QByteArray ba;
     QBuffer buffer( &ba );
     buffer.open( QIODevice::WriteOnly );
-    img.save( &buffer, format );
+    QSize screenSize = QApplication::primaryScreen()->availableSize();
+    QSize imgSize    = img.size();
+    int scaleSize    = qMin( imgSize.width(), screenSize.width() );
+
+    img.scaledToWidth( scaleSize ).save( &buffer, format );
 
     data.resize( buffer.size() );
     memcpy( &data.front(), buffer.data(), data.size() );