Add more PdfMetafileCg tests

Add tests that show current printing behavior of contents being aligned
to the bottom right corner of the printed page. Show the behavior for
both portrait and landscape PDFs. Also show the behavior on large and
small destinations.

Bug: 919596
Change-Id: I1519f59b22e9c29f46c941e10b851f5d78d2fafc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2124986
Commit-Queue: Daniel Hosseinian <dhoss@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756379}

pdf/test/data/landscape_rectangles.in

+{{header}}
+{{object 1 0}} <<
+  /Type /Catalog
+  /Pages 2 0 R
+>>
+endobj
+{{object 2 0}} <<
+  /Type /Pages
+  /MediaBox [ 0 0 800 500 ]
+  /CropBox [ 200 100 800 500 ]
+  /Count 1
+  /Kids [ 3 0 R ]
+>>
+endobj
+{{object 3 0}} <<
+  /Type /Page
+  /Parent 2 0 R
+  /Contents 4 0 R
+>>
+endobj
+{{object 4 0}} <<
+  {{streamlen}}
+>>
+stream
+q
+0 0 0 rg
+200 100 20 20 re B*
+220 250 130 100 re B*
+1 0 1 rg
+780 480 20 20 re B*
+650 250 130 100 re B*
+1 1 0 rg
+780 100 20 20 re B*
+450 120 100 130 re B*
+0 1 1 rg
+200 480 20 20 re B*
+450 350 100 130 re B*
+Q
+endstream
+endobj
+{{xref}}
+{{trailer}}
+{{startxref}}
+%%EOF

printing/pdf_metafile_cg_mac_unittest.cc

@@ -212,11 +212,51 @@ TEST(PdfMetafileCgTest, GetPageBounds) {
   }
 }
 
-TEST(PdfMetafileCgTest, RenderPageBasic) {
+TEST(PdfMetafileCgTest, RenderPortraitRectangles) {
   constexpr gfx::Rect kPageBounds(200, 300);
   constexpr gfx::Size kDestinationSize(200, 300);
   TestRenderPage("rectangles.pdf", /*page_number=*/1, kPageBounds,
-                 "rectangles_cg_expected.pdf.0.png", kDestinationSize);
+                 "render_portrait_rectangles_expected.0.png", kDestinationSize);
+}
+
+TEST(PdfMetafileCgTest, RenderLargePortraitRectangles) {
+  constexpr gfx::Rect kPageBounds(200, 300);
+  constexpr gfx::Size kDestinationSize(100, 120);
+  TestRenderPage("rectangles.pdf", /*page_number=*/1, kPageBounds,
+                 "render_large_portrait_rectangles_expected.0.png",
+                 kDestinationSize);
+}
+
+TEST(PdfMetafileCgTest, RenderSmallPortraitRectangles) {
+  constexpr gfx::Rect kPageBounds(200, 300);
+  constexpr gfx::Size kDestinationSize(300, 450);
+  TestRenderPage("rectangles.pdf", /*page_number=*/1, kPageBounds,
+                 "render_small_portrait_rectangles_expected.0.png",
+                 kDestinationSize);
+}
+
+TEST(PdfMetafileCgTest, RenderLandscapeRectangles) {
+  constexpr gfx::Rect kPageBounds(800, 500);
+  constexpr gfx::Size kDestinationSize(400, 600);
+  TestRenderPage("landscape_rectangles.pdf", /*page_number=*/1, kPageBounds,
+                 "render_landscape_rectangles_expected.0.png",
+                 kDestinationSize);
+}
+
+TEST(PdfMetafileCgTest, RenderLargeLandscapeRectangles) {
+  constexpr gfx::Rect kPageBounds(800, 500);
+  constexpr gfx::Size kDestinationSize(200, 300);
+  TestRenderPage("landscape_rectangles.pdf", /*page_number=*/1, kPageBounds,
+                 "render_large_landscape_rectangles_expected.0.png",
+                 kDestinationSize);
+}
+
+TEST(PdfMetafileCgTest, RenderSmallLandscapeRectangles) {
+  constexpr gfx::Rect kPageBounds(800, 500);
+  constexpr gfx::Size kDestinationSize(600, 900);
+  TestRenderPage("landscape_rectangles.pdf", /*page_number=*/1, kPageBounds,
+                 "render_small_landscape_rectangles_expected.0.png",
+                 kDestinationSize);
 }
 
 }  // namespace printing

printing/test/data/pdf_cg/README.md

@@ -3,4 +3,5 @@ pdf_cg test expectations
 The PNG files in this directory are the CoreGraphics rendering outputs for PDFs
 in //pdf/test/data/. They are generated from raw bitmaps using
 gfx::PNGCodec::Encode() using the |gfx::PNGCodec::FORMAT_BGRA| format. The PNGs
-are further optimized with optipng.
+are further optimized with optipng. Each PNG file is named after the
+PdfMetafileCgTest instance that uses it.