1 files changed, 56 insertions, 0 deletions
diff --git a/include/vcl/filter/PngImageReader.hxx b/include/vcl/filter/PngImageReader.hxx
new file mode 100644
index 000000000..bbb5b7c8d
--- /dev/null
+++ b/include/vcl/filter/PngImageReader.hxx
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#ifndef INCLUDED_VCL_FILTER_PNGIMAGEREADER_HXX
+#define INCLUDED_VCL_FILTER_PNGIMAGEREADER_HXX
+
+#include <sal/config.h>
+
+#include <memory>
+
+#include <vcl/dllapi.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+
+namespace com::sun::star::task
+{
+class XStatusIndicator;
+}
+
+class BitmapEx;
+class SvStream;
+
+namespace vcl
+{
+class VCL_DLLPUBLIC PngImageReader
+{
+    SvStream& mrStream;
+    css::uno::Reference<css::task::XStatusIndicator> mxStatusIndicator;
+
+public:
+    PngImageReader(SvStream& rStream);
+
+    // Returns true if image was successfully read without errors.
+    // A usable bitmap may be returned even if there were errors (e.g. incomplete image).
+    bool read(BitmapEx& rBitmap);
+    // Returns a bitmap without indicating if there were errors.
+    BitmapEx read();
+
+    // Returns the contents of the msOG chunk (containing a Gif image), if it exists.
+    // Does not change position in the stream.
+    static std::unique_ptr<sal_uInt8[]> getMicrosoftGifChunk(SvStream& rStream,
+                                                             sal_Int32* chunkSize = nullptr);
+};
+
+} // namespace vcl
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */