--- src/plugins/imageformats/tga/qtgafile.cpp

+++ src/plugins/imageformats/tga/qtgafile.cpp

@@ -41,6 +41,7 @@

 #include "qtgafile.h"

+#include <QtCore/QBuffer>

 #include <QtCore/QIODevice>

 #include <QtCore/QDebug>

 #include <QtCore/QDateTime>

@@ -264,3 +265,16 @@ QImage QTgaFile::readImage()

     // TODO: add processing of TGA extension information - ie TGA 2.0 files

     return im;

 }

+/**

+ * Checks if device contains a valid tga image, *without* changing device

+ * position.

+ */

+bool QTgaFile::canRead(QIODevice *device)

+{

+       QByteArray header = device->peek(HeaderSize);

+       if (header.size() < HeaderSize)

+               return false;

+       QBuffer buffer(&header);

+       QTgaFile tga(&buffer);

+       return tga.isValid();

+}

--- src/plugins/imageformats/tga/qtgafile.h

+++ src/plugins/imageformats/tga/qtgafile.h

@@ -93,6 +93,8 @@ public:

     inline QSize size() const;

     inline Compression compression() const;

+    static bool canRead(QIODevice *device);

+

 private:

     static inline quint16 littleEndianInt(const unsigned char *d);

--- src/plugins/imageformats/tga/qtgahandler.cpp

+++ src/plugins/imageformats/tga/qtgahandler.cpp

@@ -77,8 +77,7 @@ bool QTgaHandler::canRead(QIODevice *dev

         qWarning("QTgaHandler::canRead() called with no device");

         return false;

     }

-    QTgaFile tga(device);

-    return tga.isValid();

+    return QTgaFile::canRead(device);

 }

 bool QTgaHandler::read(QImage *image)