From 24e3e25cd4faf4c12bde8da16d60456d52520ccb Mon Sep 17 00:00:00 2001
From: kazord <kazord@gmail.com>
Date: Fri, 6 Apr 2018 02:32:01 +0200
Subject: [PATCH] screenshot from QT buffer

---
 src/scanner/AutoBarcodeScanner.cpp | 31 +++++++++++++++++++++++-------
 src/scanner/AutoBarcodeScanner.h   |  3 +++
 src/scanner/BarcodeDecoder.cpp     |  4 ++++
 src/scanner/BarcodeDecoder.h       |  2 +-
 4 files changed, 32 insertions(+), 8 deletions(-)

diff --git a/src/scanner/AutoBarcodeScanner.cpp b/src/scanner/AutoBarcodeScanner.cpp
index 17b31ae..e151d1f 100644
--- a/src/scanner/AutoBarcodeScanner.cpp
+++ b/src/scanner/AutoBarcodeScanner.cpp
@@ -31,6 +31,8 @@ THE SOFTWARE.
 #include <QStandardPaths>
 #include <QtDBus/QDBusMessage>
 #include <QtDBus/QDBusConnection>
+#include <QGuiApplication>
+#include <QQuickWindow>
 
 #include <iostream>
 #include <fstream>
@@ -60,6 +62,15 @@ AutoBarcodeScanner::AutoBarcodeScanner(QObject * parent)
     createConnections();
     m_timeoutTimer->setSingleShot(true);
     connect(m_timeoutTimer, SIGNAL(timeout()), this, SLOT(slotScanningTimeout()));
+
+    QGuiApplication *app = qobject_cast<QGuiApplication*>(qApp);
+
+       foreach (QWindow *win, app->allWindows()) {
+           QQuickWindow *quickWin = qobject_cast<QQuickWindow*>(win);
+           if (quickWin) {
+               m_mainWindow = quickWin;
+           }
+       }
 }
 
 AutoBarcodeScanner::~AutoBarcodeScanner() {
@@ -231,17 +242,22 @@ void AutoBarcodeScanner::processDecode() {
         m_scanProcessMutex.unlock();
 
         if (scanActive) {
-            createScreeshot();
-            QImage screenshot(m_decoder->getCaptureLocation());
-            saveDebugImage(screenshot, "debug_screenshot.jpg");
+            QImage screenshot = m_mainWindow->grabWindow();
+            //maybe
+            //saveDebugImage(screenshot, "debug_screenshot.jpg");
 
             // crop the image - we need only the viewfinder
             QImage copy = screenshot.copy(m_viewFinderRect);
-            copy.save(m_decoder->getCaptureLocation());
-            saveDebugImage(copy, "debug_cropped.jpg");
+            //maybe
+            //copy.save(m_decoder->getCaptureLocation());
+            //saveDebugImage(copy, "debug_cropped.jpg");
+
+
 
             qDebug() << "decoding cropped screenshot ...";
-            result = m_decoder->decodeBarcodeFromCache();
+            result = m_decoder->decodeBarcodeFromImage(copy);
+
+            copy.save(m_decoder->getCaptureLocation());
             code = result["content"].toString();
 
             if (code.isEmpty()) {
@@ -249,11 +265,12 @@ void AutoBarcodeScanner::processDecode() {
                 QTransform transform;
                 transform.rotate(90);
                 copy = copy.transformed(transform);
+                //maybe still do it in debug
                 copy.save(m_decoder->getCaptureLocation());
                 saveDebugImage(copy, "debug_transformed.jpg");
 
                 qDebug() << "decoding rotated screenshot ...";
-                result = m_decoder->decodeBarcodeFromCache();
+                result = m_decoder->decodeBarcodeFromImage(copy);
                 code = result["content"].toString();
             }
 
diff --git a/src/scanner/AutoBarcodeScanner.h b/src/scanner/AutoBarcodeScanner.h
index 6dc833d..45bacb2 100644
--- a/src/scanner/AutoBarcodeScanner.h
+++ b/src/scanner/AutoBarcodeScanner.h
@@ -35,6 +35,8 @@ THE SOFTWARE.
 #include <QThread>
 #include <QColor>
 #include <QtConcurrent>
+#include <QGuiApplication>
+#include <QQuickWindow>
 #include <QtQml/qqmlparserstatus.h>
 #include "BarcodeDecoder.h"
 
@@ -129,6 +131,7 @@ public slots:
 
     QMutex m_scanProcessMutex;
     QWaitCondition m_scanProcessStopped;
+    QQuickWindow* m_mainWindow;
 
     // options
     QRect m_viewFinderRect;
diff --git a/src/scanner/BarcodeDecoder.cpp b/src/scanner/BarcodeDecoder.cpp
index 1bc465e..37595da 100644
--- a/src/scanner/BarcodeDecoder.cpp
+++ b/src/scanner/BarcodeDecoder.cpp
@@ -87,3 +87,7 @@ QVariantHash BarcodeDecoder::decodeBarcodeFromCache() {
     QVariantHash result = decoder->decodeImageEx(img);
     return result;
 }
+QVariantHash BarcodeDecoder::decodeBarcodeFromImage(QImage &img) {
+    QVariantHash result = decoder->decodeImageEx(img);
+    return result;
+}
diff --git a/src/scanner/BarcodeDecoder.h b/src/scanner/BarcodeDecoder.h
index 359e4ca..fc6bef1 100644
--- a/src/scanner/BarcodeDecoder.h
+++ b/src/scanner/BarcodeDecoder.h
@@ -40,7 +40,7 @@ class BarcodeDecoder : public QObject
     virtual ~BarcodeDecoder();
 
     QVariantHash decodeBarcodeFromCache();
-
+    QVariantHash decodeBarcodeFromImage(QImage &img);
     void setDecoderFormat(const int &format);
     QString getCaptureLocation() const;