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, 6 insertions, 0 deletions

diff --git a/xfa/fwl/cfx_barcode_unittest.cpp b/xfa/fwl/cfx_barcode_unittest.cpp
index 4b1dc059ce..0fa2352175 100644
--- a/xfa/fwl/cfx_barcode_unittest.cpp
+++ b/xfa/fwl/cfx_barcode_unittest.cpp
@@ -14,6 +14,7 @@
 #include "core/fxge/cfx_renderdevice.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/test_support.h"
+#include "testing/utils/bitmap_saver.h"
 #include "third_party/base/ptr_util.h"
 
 class BarcodeTest : public testing::Test {
@@ -58,6 +59,11 @@ class BarcodeTest : public testing::Test {
                              bitmap_->GetPitch() * bitmap_->GetHeight());
   }
 
+  // Manually insert calls to this as needed for debugging.
+  void SaveBitmap(const std::string& filename) {
+    BitmapSaver::WriteBitmapToPng(bitmap_.Get(), filename);
+  }
+
  protected:
   CFX_Matrix matrix_;
   std::unique_ptr<CFX_Barcode> barcode_;