1 files changed, 56 insertions, 0 deletions
diff --git a/src/maingui/backdrop.cpp b/src/maingui/backdrop.cpp
new file mode 100644
index 0000000..4a907e8
--- /dev/null
+++ b/src/maingui/backdrop.cpp
@@ -0,0 +1,56 @@
+#include "backdrop.h"
+
+#include <QApplication>
+#include <QDesktopWidget>
+#include <QPainter>
+#include <QPaintEvent>
+#include <QPixmap>
+#include <QRgb>
+
+Backdrop::Backdrop() :
+			QWidget(NULL),
+			screenshot(NULL),
+			mainWindow(NULL)
+{
+	QPixmap shot = QPixmap::grabWindow(QApplication::desktop()->winId());
+	if (!shot.isNull() && shot.height() > 0) {
+		QImage img = shot.toImage();
+		if (img.format() != QImage::Format_RGB32) {
+			img = img.convertToFormat(QImage::Format_RGB32);
+		}
+		for (int i = 0; i < img.height(); ++i) {
+			uchar *line = img.scanLine(i);
+			if (line == NULL)
+				continue;
+			QRgb *rgb = (QRgb*)line;
+			for (int x = 0; x < img.width(); ++x) {
+				const int val = (qRed(*rgb)*11 + qGreen(*rgb)*16 + qBlue(*rgb)*5) / 32;
+				*rgb = qRgb(val, val, val);
+				rgb++;
+			}
+		}
+		shot = QPixmap::fromImage(img);
+	}
+	screenshot = new QPixmap(shot);
+	this->resize(screenshot->width(), screenshot->height());
+	this->setWindowFlags(Qt::Tool | Qt::CustomizeWindowHint | Qt::FramelessWindowHint);
+}
+
+Backdrop::~Backdrop()
+{
+	delete screenshot;
+}
+
+void Backdrop::paintEvent(QPaintEvent * event)
+{
+	QPainter p(this);
+	p.drawPixmap(event->rect(), *screenshot, event->rect());
+}
+
+void Backdrop::mouseReleaseEvent(QMouseEvent * event)
+{
+	if (mainWindow != NULL) {
+		mainWindow->raise();
+		mainWindow->activateWindow();
+	}
+}