Remove GlyphBuffer

third_party/WebKit/Source/platform/fonts/shaping/ShapeResultBloberizerTest.cpp

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "platform/fonts/shaping/ShapeResultBloberizer.h"
+
+#include "platform/fonts/Font.h"
+#include "platform/fonts/SimpleFontData.h"
+#include "platform/fonts/shaping/ShapeResultTestInfo.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "wtf/Optional.h"
+
+namespace blink {
+
+namespace {
+
+// Minimal TestSimpleFontData implementation.
+// Font has no glyphs, but that's okay.
+class TestSimpleFontData : public SimpleFontData {
+ public:
+  static PassRefPtr<TestSimpleFontData> create() {
+    return adoptRef(new TestSimpleFontData);
+  }
+
+ private:
+  TestSimpleFontData() : SimpleFontData(nullptr, 10, false, false) {}
+};
+
+}  // anonymous namespace
+
+TEST(ShapeResultBloberizerTest, StartsEmpty) {
+  Font font;
+  ShapeResultBloberizer bloberizer(font, 1);
+
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingRunFontData(bloberizer),
+            nullptr);
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingRunGlyphs(bloberizer).size(),
+            0ul);
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingRunOffsets(bloberizer).size(),
+            0ul);
+  EXPECT_FALSE(
+      ShapeResultBloberizerTestInfo::hasPendingRunVerticalOffsets(bloberizer));
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingBlobRunCount(bloberizer),
+            0ul);
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::committedBlobCount(bloberizer), 0ul);
+
+  EXPECT_TRUE(bloberizer.blobs().isEmpty());
+}
+
+TEST(ShapeResultBloberizerTest, StoresGlyphsOffsets) {
+  Font font;
+  ShapeResultBloberizer bloberizer(font, 1);
+
+  RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
+  RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
+
+  // 2 pending glyphs
+  bloberizer.add(42, font1.get(), 10);
+  bloberizer.add(43, font1.get(), 15);
+
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingRunFontData(bloberizer),
+            font1.get());
+  EXPECT_FALSE(
+      ShapeResultBloberizerTestInfo::hasPendingRunVerticalOffsets(bloberizer));
+  {
+    const auto& glyphs =
+        ShapeResultBloberizerTestInfo::pendingRunGlyphs(bloberizer);
+    EXPECT_EQ(glyphs.size(), 2ul);
+    EXPECT_EQ(42, glyphs[0]);
+    EXPECT_EQ(43, glyphs[1]);
+
+    const auto& offsets =
+        ShapeResultBloberizerTestInfo::pendingRunOffsets(bloberizer);
+    EXPECT_EQ(offsets.size(), 2ul);
+    EXPECT_EQ(10, offsets[0]);
+    EXPECT_EQ(15, offsets[1]);
+  }
+
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingBlobRunCount(bloberizer),
+            0ul);
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::committedBlobCount(bloberizer), 0ul);
+
+  // one more glyph, different font => pending run flush
+  bloberizer.add(44, font2.get(), 12);
+
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingRunFontData(bloberizer),
+            font2.get());
+  EXPECT_FALSE(
+      ShapeResultBloberizerTestInfo::hasPendingRunVerticalOffsets(bloberizer));
+  {
+    const auto& glyphs =
+        ShapeResultBloberizerTestInfo::pendingRunGlyphs(bloberizer);
+    EXPECT_EQ(glyphs.size(), 1ul);
+    EXPECT_EQ(44, glyphs[0]);
+
+    const auto& offsets =
+        ShapeResultBloberizerTestInfo::pendingRunOffsets(bloberizer);
+    EXPECT_EQ(offsets.size(), 1ul);
+    EXPECT_EQ(12, offsets[0]);
+  }
+
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingBlobRunCount(bloberizer),
+            1ul);
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::committedBlobCount(bloberizer), 0ul);
+
+  // flush everything (1 blob w/ 2 runs)
+  EXPECT_EQ(bloberizer.blobs().size(), 1ul);
+}
+
+TEST(ShapeResultBloberizerTest, StoresGlyphsVerticalOffsets) {
+  Font font;
+  ShapeResultBloberizer bloberizer(font, 1);
+
+  RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
+  RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
+
+  // 2 pending glyphs
+  bloberizer.add(42, font1.get(), FloatPoint(10, 0));
+  bloberizer.add(43, font1.get(), FloatPoint(15, 0));
+
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingRunFontData(bloberizer),
+            font1.get());
+  EXPECT_TRUE(
+      ShapeResultBloberizerTestInfo::hasPendingRunVerticalOffsets(bloberizer));
+  {
+    const auto& glyphs =
+        ShapeResultBloberizerTestInfo::pendingRunGlyphs(bloberizer);
+    EXPECT_EQ(glyphs.size(), 2ul);
+    EXPECT_EQ(42, glyphs[0]);
+    EXPECT_EQ(43, glyphs[1]);
+
+    const auto& offsets =
+        ShapeResultBloberizerTestInfo::pendingRunOffsets(bloberizer);
+    EXPECT_EQ(offsets.size(), 4ul);
+    EXPECT_EQ(10, offsets[0]);
+    EXPECT_EQ(0, offsets[1]);
+    EXPECT_EQ(15, offsets[2]);
+    EXPECT_EQ(0, offsets[3]);
+  }
+
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingBlobRunCount(bloberizer),
+            0ul);
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::committedBlobCount(bloberizer), 0ul);
+
+  // one more glyph, different font => pending run flush
+  bloberizer.add(44, font2.get(), FloatPoint(12, 2));
+
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingRunFontData(bloberizer),
+            font2.get());
+  EXPECT_TRUE(
+      ShapeResultBloberizerTestInfo::hasPendingRunVerticalOffsets(bloberizer));
+  {
+    const auto& glyphs =
+        ShapeResultBloberizerTestInfo::pendingRunGlyphs(bloberizer);
+    EXPECT_EQ(glyphs.size(), 1ul);
+    EXPECT_EQ(44, glyphs[0]);
+
+    const auto& offsets =
+        ShapeResultBloberizerTestInfo::pendingRunOffsets(bloberizer);
+    EXPECT_EQ(offsets.size(), 2ul);
+    EXPECT_EQ(12, offsets[0]);
+    EXPECT_EQ(2, offsets[1]);
+  }
+
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::pendingBlobRunCount(bloberizer),
+            1ul);
+  EXPECT_EQ(ShapeResultBloberizerTestInfo::committedBlobCount(bloberizer), 0ul);
+
+  // flush everything (1 blob w/ 2 runs)
+  EXPECT_EQ(bloberizer.blobs().size(), 1ul);
+}
+
+}  // namespace blink

[drott, 2017/03/23 15:36:52]

Could you perhaps add a test case which modifies the TestSimpleFontData so that
it would have the characteristic of having a different blobRotation() and check
that we see two blobs with one run each created? Could be a follow-up CL.

[f(malita), 2017/03/23 19:30:17]

I tried and initially got stuck because OpenTypeVerticalData is pulled from
FontCache and I couldn't find a good way to mock it.  I think I figured a way to
do it though, I'll upload a follow-up (requires some SimpleFontData fiddling).