src/third_party/WebKit/Source/platform/fonts/GlyphBufferTest.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6 #include "platform/fonts/GlyphBuffer.h"
   7
   8 #include "platform/fonts/SimpleFontData.h"
   9 #include "wtf/PassRefPtr.h"
  10 #include "wtf/RefPtr.h"
  11 #include <gtest/gtest.h>
  12
  13 using namespace blink;
  14
  15 namespace {
  16
  17 // Minimal TestSimpleFontData implementation.
  18 // Font has no glyphs, but that's okay.
  19 class TestSimpleFontData : public SimpleFontData {
  20 public:
  21     static PassRefPtr<TestSimpleFontData> create()
  22     {
  23         return adoptRef(new TestSimpleFontData);
  24     }
  25
  26 private:
  27     TestSimpleFontData() : SimpleFontData(nullptr, 10, false, false) { }
  28
  29     bool fillGlyphPage(GlyphPage* pageToFill, unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength) const override
  30     {
  31         return false;
  32     }
  33 };
  34
  35 TEST(GlyphBufferTest, StartsEmpty)
  36 {
  37     GlyphBuffer glyphBuffer;
  38     EXPECT_TRUE(glyphBuffer.isEmpty());
  39     EXPECT_EQ(0u, glyphBuffer.size());
  40 }
  41
  42 TEST(GlyphBufferTest, StoresGlyphs)
  43 {
  44     RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
  45     RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
  46
  47     GlyphBuffer glyphBuffer;
  48     glyphBuffer.add(42, font1.get(), 10);
  49     glyphBuffer.add(43, font1.get(), 15);
  50     glyphBuffer.add(44, font2.get(), 12);
  51
  52     EXPECT_FALSE(glyphBuffer.isEmpty());
  53     EXPECT_FALSE(glyphBuffer.hasOffsets());
  54     EXPECT_EQ(3u, glyphBuffer.size());
  55
  56     EXPECT_EQ(42, glyphBuffer.glyphAt(0));
  57     EXPECT_EQ(43, glyphBuffer.glyphAt(1));
  58     EXPECT_EQ(44, glyphBuffer.glyphAt(2));
  59
  60     const Glyph* glyphs = glyphBuffer.glyphs(0);
  61     EXPECT_EQ(42, glyphs[0]);
  62     EXPECT_EQ(43, glyphs[1]);
  63     EXPECT_EQ(44, glyphs[2]);
  64 }
  65
  66 TEST(GlyphBufferTest, StoresOffsets)
  67 {
  68     RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
  69     RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
  70
  71     GlyphBuffer glyphBuffer;
  72     glyphBuffer.add(42, font1.get(), FloatSize(10, 0), 0);
  73     glyphBuffer.add(43, font1.get(), FloatSize(15, 0), 0);
  74     glyphBuffer.add(44, font2.get(), FloatSize(12, 2), 0);
  75
  76     EXPECT_FALSE(glyphBuffer.isEmpty());
  77     EXPECT_TRUE(glyphBuffer.hasOffsets());
  78     EXPECT_EQ(3u, glyphBuffer.size());
  79
  80     const FloatSize* offsets = glyphBuffer.offsets(0);
  81     EXPECT_EQ(FloatSize(10, 0), offsets[0]);
  82     EXPECT_EQ(FloatSize(15, 0), offsets[1]);
  83     EXPECT_EQ(FloatSize(12, 2), offsets[2]);
  84 }
  85
  86 TEST(GlyphBufferTest, StoresAdvances)
  87 {
  88     RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
  89     RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
  90
  91     GlyphBuffer glyphBuffer;
  92     glyphBuffer.add(42, font1.get(), 10);
  93     glyphBuffer.add(43, font1.get(), 15);
  94     glyphBuffer.add(44, font2.get(), 20);
  95
  96     EXPECT_FALSE(glyphBuffer.isEmpty());
  97     EXPECT_EQ(3u, glyphBuffer.size());
  98
  99     EXPECT_EQ(10, glyphBuffer.advanceAt(0));
 100     EXPECT_EQ(15, glyphBuffer.advanceAt(1));
 101     EXPECT_EQ(20, glyphBuffer.advanceAt(2));
 102
 103     const float* advances = glyphBuffer.advances(0);
 104     EXPECT_EQ(10, advances[0]);
 105     EXPECT_EQ(15, advances[1]);
 106     EXPECT_EQ(20, advances[2]);
 107 }
 108
 109 TEST(GlyphBufferTest, StoresSimpleFontData)
 110 {
 111     RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
 112     RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
 113
 114     GlyphBuffer glyphBuffer;
 115     glyphBuffer.add(42, font1.get(), 10);
 116     glyphBuffer.add(43, font1.get(), 15);
 117     glyphBuffer.add(44, font2.get(), 12);
 118
 119     EXPECT_FALSE(glyphBuffer.isEmpty());
 120     EXPECT_EQ(3u, glyphBuffer.size());
 121
 122     EXPECT_EQ(font1.get(), glyphBuffer.fontDataAt(0));
 123     EXPECT_EQ(font1.get(), glyphBuffer.fontDataAt(1));
 124     EXPECT_EQ(font2.get(), glyphBuffer.fontDataAt(2));
 125 }
 126
 127 TEST(GlyphBufferTest, GlyphArrayWithOffset)
 128 {
 129     RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
 130     RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
 131
 132     GlyphBuffer glyphBuffer;
 133     glyphBuffer.add(42, font1.get(), 10);
 134     glyphBuffer.add(43, font1.get(), 15);
 135     glyphBuffer.add(44, font2.get(), 12);
 136
 137     EXPECT_FALSE(glyphBuffer.isEmpty());
 138     EXPECT_EQ(3u, glyphBuffer.size());
 139
 140     const Glyph* glyphs = glyphBuffer.glyphs(1);
 141     EXPECT_EQ(43, glyphs[0]);
 142     EXPECT_EQ(44, glyphs[1]);
 143 }
 144
 145 TEST(GlyphBufferTest, AdvanceArrayWithOffset)
 146 {
 147     RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
 148     RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
 149
 150     GlyphBuffer glyphBuffer;
 151     glyphBuffer.add(42, font1.get(), 10);
 152     glyphBuffer.add(43, font1.get(), 15);
 153     glyphBuffer.add(43, font1.get(), 12);
 154
 155     EXPECT_FALSE(glyphBuffer.isEmpty());
 156     EXPECT_EQ(3u, glyphBuffer.size());
 157
 158     const float* advances = glyphBuffer.advances(1);
 159     EXPECT_EQ(15, advances[0]);
 160     EXPECT_EQ(12, advances[1]);
 161 }
 162
 163 TEST(GlyphBufferTest, Reverse)
 164 {
 165     RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
 166     RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
 167
 168     GlyphBuffer glyphBuffer;
 169     glyphBuffer.add(42, font1.get(), 10);
 170     glyphBuffer.add(43, font1.get(), 15);
 171     glyphBuffer.add(44, font2.get(), 20);
 172
 173     EXPECT_FALSE(glyphBuffer.isEmpty());
 174     EXPECT_EQ(3u, glyphBuffer.size());
 175
 176     glyphBuffer.reverse();
 177
 178     EXPECT_FALSE(glyphBuffer.isEmpty());
 179     EXPECT_EQ(3u, glyphBuffer.size());
 180     EXPECT_EQ(44, glyphBuffer.glyphAt(0));
 181     EXPECT_EQ(43, glyphBuffer.glyphAt(1));
 182     EXPECT_EQ(42, glyphBuffer.glyphAt(2));
 183     EXPECT_EQ(20, glyphBuffer.advanceAt(0));
 184     EXPECT_EQ(15, glyphBuffer.advanceAt(1));
 185     EXPECT_EQ(10, glyphBuffer.advanceAt(2));
 186     EXPECT_EQ(font2.get(), glyphBuffer.fontDataAt(0));
 187     EXPECT_EQ(font1.get(), glyphBuffer.fontDataAt(1));
 188     EXPECT_EQ(font1.get(), glyphBuffer.fontDataAt(2));
 189 }
 190
 191 TEST(GlyphBufferTest, ExpandLastAdvance)
 192 {
 193     RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
 194     RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
 195
 196     GlyphBuffer glyphBuffer;
 197     glyphBuffer.add(42, font1.get(), 10);
 198     glyphBuffer.add(43, font1.get(), 15);
 199     glyphBuffer.add(44, font2.get(), 12);
 200
 201     glyphBuffer.expandLastAdvance(20);
 202     EXPECT_EQ(32, glyphBuffer.advanceAt(2));
 203 }
 204
 205 } // namespace