Add test case for a font substitution regression.

BUG=chromium:820345

Change-Id: Ia3adb6a7565e12f3d5e129e2babb4b8628028269
Reviewed-on: https://pdfium-review.googlesource.com/32810
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

3 files changed, 70 insertions, 0 deletions

diff --git a/testing/resources/pixel/bug_820345.in b/testing/resources/pixel/bug_820345.in
new file mode 100644
index 0000000000..2b440d5baa
--- /dev/null
+++ b/testing/resources/pixel/bug_820345.in
@@ -0,0 +1,70 @@
+{{header}}
+{{object 1 0}} <<
+  /Type /Catalog
+  /Pages 2 0 R
+>>
+endobj
+{{object 2 0}} <<
+  /Type /Pages
+  /MediaBox [ 0 0 200 200 ]
+  /Count 1
+  /Kids [ 3 0 R ]
+>>
+endobj
+{{object 3 0}} <<
+  /Type /Page
+  /Parent 2 0 R
+  /Resources <<
+    /Font <<
+      /F1 4 0 R
+      /F2 5 0 R
+    >>
+  >>
+  /Contents 6 0 R
+>>
+endobj
+{{object 4 0}} <<
+  /Type /Font
+  /Subtype /Type1
+  /BaseFont /Times-Roman
+>>
+endobj
+{{object 5 0}} <<
+  /Type /Font
+  /Subtype /Type1
+  /BaseFont /Helvetica
+  /FontDescriptor 7 0 R
+>>
+endobj
+{{object 6 0}} <<
+  {{streamlen}}
+>>
+stream
+BT
+20 50 Td
+/F1 12 Tf
+(Hello, world!) Tj
+0 50 Td
+/F2 16 Tf
+(Goodbye, world!) Tj
+ET
+endstream
+endobj
+{{object 7 0}} <<
+  /StemV 440
+  /ItalicAngle 0
+  /FontName /Arial
+  /Ascent 776
+  /Type /FontDescriptor
+  /Flags 33
+  /FontBBox [-250 -236 2827 1000]
+  /CapHeight 763
+  /Descent -223
+  /MissingWidth 745
+  /MaxWidth 2658
+>>
+endobj
+{{xref}}
+{{trailer}}
+{{startxref}}
+%%EOF
diff --git a/testing/resources/pixel/bug_820345_expected.pdf.0.png b/testing/resources/pixel/bug_820345_expected.pdf.0.png
new file mode 100644
index 0000000000..c29515a937
--- /dev/null
+++ b/testing/resources/pixel/bug_820345_expected.pdf.0.png
diff --git a/testing/resources/pixel/bug_820345_expected_mac.pdf.0.png b/testing/resources/pixel/bug_820345_expected_mac.pdf.0.png
new file mode 100644
index 0000000000..6e79402ffc
--- /dev/null
+++ b/testing/resources/pixel/bug_820345_expected_mac.pdf.0.png