Add a way to save a barcode generated bitmap to a .png.

This is useful for debugging and validation purposes. The hashes that
are in BarcodeTest are not necessarily for valid outputs.

This CL refactors the code in embedder_test.png that already does this,
moving it to testing/utils where unit tests can access it too.

Bug: pdfium:1135
Change-Id: I6f1d70a4e133f8f04dbe52646087f99c448e95f8
Reviewed-on: https://pdfium-review.googlesource.com/40152
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/testing/utils/bitmap_saver.h b/testing/utils/bitmap_saver.h
new file mode 100644
index 0000000000..9f931fc323
--- /dev/null
+++ b/testing/utils/bitmap_saver.h
@@ -0,0 +1,21 @@
+// Copyright 2018 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef TESTING_UTILS_BITMAP_SAVER_H_
+#define TESTING_UTILS_BITMAP_SAVER_H_
+
+#include <string>
+
+#include "public/fpdfview.h"
+
+class CFX_DIBitmap;
+
+class BitmapSaver {
+ public:
+  static void WriteBitmapToPng(FPDF_BITMAP bitmap, const std::string& filename);
+  static void WriteBitmapToPng(CFX_DIBitmap* bitmap,
+                               const std::string& filename);
+};
+
+#endif  // TESTING_UTILS_BITMAP_SAVER_H_