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-rw-r--r--testing/embedder_test.cpp28
-rw-r--r--testing/embedder_test.h6
2 files changed, 34 insertions, 0 deletions
diff --git a/testing/embedder_test.cpp b/testing/embedder_test.cpp
index de7251383b..09a8533902 100644
--- a/testing/embedder_test.cpp
+++ b/testing/embedder_test.cpp
@@ -6,6 +6,7 @@
#include <limits.h>
+#include <fstream>
#include <list>
#include <string>
#include <utility>
@@ -17,6 +18,7 @@
#include "public/fpdf_text.h"
#include "public/fpdfview.h"
#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/image_diff/image_diff_png.h"
#include "testing/test_support.h"
#include "testing/utils/path_service.h"
#include "third_party/base/ptr_util.h"
@@ -426,6 +428,32 @@ std::string EmbedderTest::HashBitmap(FPDF_BITMAP bitmap) {
return CryptToBase16(digest);
}
+#ifndef NDEBUG
+// static
+void EmbedderTest::WriteBitmapToPng(FPDF_BITMAP bitmap,
+ const std::string& filename) {
+ const int stride = FPDFBitmap_GetStride(bitmap);
+ const int width = FPDFBitmap_GetWidth(bitmap);
+ const int height = FPDFBitmap_GetHeight(bitmap);
+ const auto* buffer =
+ static_cast<const unsigned char*>(FPDFBitmap_GetBuffer(bitmap));
+
+ std::vector<unsigned char> png_encoding;
+ bool encoded = image_diff_png::EncodeBGRAPNG(buffer, width, height, stride,
+ false, &png_encoding);
+
+ ASSERT_TRUE(encoded);
+ ASSERT_LT(filename.size(), 256u);
+
+ std::ofstream png_file;
+ png_file.open(filename);
+ png_file.write(reinterpret_cast<char*>(&png_encoding.front()),
+ png_encoding.size());
+ ASSERT_TRUE(png_file.good());
+ png_file.close();
+}
+#endif
+
// static
void EmbedderTest::CompareBitmap(FPDF_BITMAP bitmap,
int expected_width,
diff --git a/testing/embedder_test.h b/testing/embedder_test.h
index 8da1643824..98432e3e54 100644
--- a/testing/embedder_test.h
+++ b/testing/embedder_test.h
@@ -134,6 +134,12 @@ class EmbedderTest : public ::testing::Test,
// Return the hash of |bitmap|.
static std::string HashBitmap(FPDF_BITMAP bitmap);
+#ifndef NDEBUG
+ // For debugging purposes.
+ // Write |bitmap| to a png file.
+ static void WriteBitmapToPng(FPDF_BITMAP bitmap, const std::string& filename);
+#endif
+
// Check |bitmap| to make sure it has the right dimensions and content.
static void CompareBitmap(FPDF_BITMAP bitmap,
int expected_width,