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485 lines
17 KiB
485 lines
17 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "minikin/Layout.h"
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#include <gtest/gtest.h>
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#include "minikin/FontCollection.h"
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#include "minikin/LayoutPieces.h"
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#include "minikin/Measurement.h"
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#include "FontTestUtils.h"
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#include "UnicodeUtils.h"
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namespace minikin {
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static void expectAdvances(const std::vector<float>& expected, const std::vector<float>& advances) {
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EXPECT_LE(expected.size(), advances.size());
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for (size_t i = 0; i < expected.size(); ++i) {
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EXPECT_EQ(expected[i], advances[i])
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<< i << "th element is different. Expected: " << expected[i]
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<< ", Actual: " << advances[i];
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}
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}
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static void getBounds(const U16StringPiece& text, Bidi bidiFlags, const MinikinPaint& paint,
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MinikinRect* out) {
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getBounds(text, Range(0, text.size()), bidiFlags, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT, out);
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}
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class LayoutTest : public testing::Test {
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protected:
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LayoutTest() : mCollection(nullptr) {}
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virtual ~LayoutTest() {}
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virtual void SetUp() override { mCollection = buildFontCollection("Ascii.ttf"); }
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virtual void TearDown() override {}
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std::shared_ptr<FontCollection> mCollection;
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};
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TEST_F(LayoutTest, doLayoutTest) {
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MinikinPaint paint(mCollection);
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paint.size = 10.0f; // make 1em = 10px
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MinikinRect rect;
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std::vector<float> expectedValues;
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std::vector<uint16_t> text;
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// The mock implementation returns 10.0f advance and 0,0-10x10 bounds for all glyph.
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{
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SCOPED_TRACE("one word");
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text = utf8ToUtf16("oneword");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(70.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(70.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectAdvances(expectedValues, layout.getAdvances());
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}
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{
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SCOPED_TRACE("two words");
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text = utf8ToUtf16("two words");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(90.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(90.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectAdvances(expectedValues, layout.getAdvances());
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}
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{
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SCOPED_TRACE("three words");
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text = utf8ToUtf16("three words test");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(160.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(160.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectAdvances(expectedValues, layout.getAdvances());
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}
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{
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SCOPED_TRACE("two spaces");
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text = utf8ToUtf16("two spaces");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(110.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(110.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectAdvances(expectedValues, layout.getAdvances());
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}
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}
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TEST_F(LayoutTest, doLayoutTest_wordSpacing) {
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MinikinPaint paint(mCollection);
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paint.size = 10.0f; // make 1em = 10px
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MinikinRect rect;
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std::vector<float> expectedValues;
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std::vector<uint16_t> text;
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paint.wordSpacing = 5.0f;
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// The mock implementation returns 10.0f advance and 0,0-10x10 bounds for all glyph.
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{
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SCOPED_TRACE("one word");
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text = utf8ToUtf16("oneword");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(70.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(70.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectAdvances(expectedValues, layout.getAdvances());
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}
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{
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SCOPED_TRACE("two words");
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text = utf8ToUtf16("two words");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(95.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(95.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectedValues[3] = 15.0f;
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expectAdvances(expectedValues, layout.getAdvances());
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}
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{
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SCOPED_TRACE("three words test");
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text = utf8ToUtf16("three words test");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(170.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(170.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectedValues[5] = 15.0f;
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expectedValues[11] = 15.0f;
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expectAdvances(expectedValues, layout.getAdvances());
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}
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{
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SCOPED_TRACE("two spaces");
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text = utf8ToUtf16("two spaces");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(120.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(120.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectedValues[3] = 15.0f;
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expectedValues[4] = 15.0f;
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expectAdvances(expectedValues, layout.getAdvances());
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}
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}
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TEST_F(LayoutTest, doLayoutTest_negativeWordSpacing) {
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MinikinPaint paint(mCollection);
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paint.size = 10.0f; // make 1em = 10px
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MinikinRect rect;
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std::vector<float> expectedValues;
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std::vector<uint16_t> text;
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// Negative word spacing also should work.
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paint.wordSpacing = -5.0f;
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{
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SCOPED_TRACE("one word");
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text = utf8ToUtf16("oneword");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(70.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(70.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectAdvances(expectedValues, layout.getAdvances());
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}
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{
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SCOPED_TRACE("two words");
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text = utf8ToUtf16("two words");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(85.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(85.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectedValues[3] = 5.0f;
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expectAdvances(expectedValues, layout.getAdvances());
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}
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{
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SCOPED_TRACE("three words");
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text = utf8ToUtf16("three word test");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(140.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(140.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectedValues[5] = 5.0f;
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expectedValues[10] = 5.0f;
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expectAdvances(expectedValues, layout.getAdvances());
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}
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{
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SCOPED_TRACE("two spaces");
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text = utf8ToUtf16("two spaces");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(100.0f, layout.getAdvance());
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getBounds(text, Bidi::LTR, paint, &rect);
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EXPECT_EQ(0.0f, rect.mLeft);
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EXPECT_EQ(10.0f, rect.mTop);
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EXPECT_EQ(100.0f, rect.mRight);
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EXPECT_EQ(0.0f, rect.mBottom);
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expectedValues.resize(text.size());
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for (size_t i = 0; i < expectedValues.size(); ++i) {
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expectedValues[i] = 10.0f;
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}
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expectedValues[3] = 5.0f;
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expectedValues[4] = 5.0f;
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expectAdvances(expectedValues, layout.getAdvances());
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}
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}
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// Test that a forced-RTL layout correctly mirros a forced-LTR layout.
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TEST_F(LayoutTest, doLayoutTest_rtlTest) {
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MinikinPaint paint(mCollection);
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std::vector<uint16_t> text = parseUnicodeString("'a' 'b' U+3042 U+3043 'c' 'd'");
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Range range(0, text.size());
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Layout ltrLayout(text, range, Bidi::FORCE_LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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Layout rtlLayout(text, range, Bidi::FORCE_RTL, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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ASSERT_EQ(ltrLayout.nGlyphs(), rtlLayout.nGlyphs());
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ASSERT_EQ(6u, ltrLayout.nGlyphs());
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size_t nGlyphs = ltrLayout.nGlyphs();
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for (size_t i = 0; i < nGlyphs; ++i) {
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EXPECT_EQ(ltrLayout.getFont(i), rtlLayout.getFont(nGlyphs - i - 1));
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EXPECT_EQ(ltrLayout.getGlyphId(i), rtlLayout.getGlyphId(nGlyphs - i - 1));
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}
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}
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// Test that single-run RTL layouts of LTR-only text is laid out identical to an LTR layout.
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TEST_F(LayoutTest, singleRunBidiTest) {
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MinikinPaint paint(mCollection);
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std::vector<uint16_t> text = parseUnicodeString("'1' '2' '3'");
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Range range(0, text.size());
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Layout ltrLayout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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Layout rtlLayout(text, range, Bidi::RTL, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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Layout defaultRtlLayout(text, range, Bidi::DEFAULT_RTL, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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const size_t nGlyphs = ltrLayout.nGlyphs();
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ASSERT_EQ(3u, nGlyphs);
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ASSERT_EQ(nGlyphs, rtlLayout.nGlyphs());
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ASSERT_EQ(nGlyphs, defaultRtlLayout.nGlyphs());
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for (size_t i = 0; i < nGlyphs; ++i) {
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EXPECT_EQ(ltrLayout.getFont(i), rtlLayout.getFont(i));
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EXPECT_EQ(ltrLayout.getGlyphId(i), rtlLayout.getGlyphId(i));
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EXPECT_EQ(ltrLayout.getFont(i), defaultRtlLayout.getFont(i));
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EXPECT_EQ(ltrLayout.getGlyphId(i), defaultRtlLayout.getGlyphId(i));
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}
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}
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TEST_F(LayoutTest, hyphenationTest) {
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MinikinPaint paint(mCollection);
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paint.size = 10.0f; // make 1em = 10px
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std::vector<uint16_t> text;
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// The mock implementation returns 10.0f advance for all glyphs.
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{
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SCOPED_TRACE("one word with no hyphen edit");
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text = utf8ToUtf16("oneword");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(70.0f, layout.getAdvance());
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}
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{
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SCOPED_TRACE("one word with hyphen insertion at the end");
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text = utf8ToUtf16("oneword");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::INSERT_HYPHEN);
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EXPECT_EQ(80.0f, layout.getAdvance());
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}
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{
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SCOPED_TRACE("one word with hyphen replacement at the end");
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text = utf8ToUtf16("oneword");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::REPLACE_WITH_HYPHEN);
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EXPECT_EQ(70.0f, layout.getAdvance());
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}
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{
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SCOPED_TRACE("one word with hyphen insertion at the start");
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text = utf8ToUtf16("oneword");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::INSERT_HYPHEN,
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EndHyphenEdit::NO_EDIT);
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EXPECT_EQ(80.0f, layout.getAdvance());
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}
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{
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SCOPED_TRACE("one word with hyphen insertion at the both ends");
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text = utf8ToUtf16("oneword");
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Range range(0, text.size());
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Layout layout(text, range, Bidi::LTR, paint, StartHyphenEdit::INSERT_HYPHEN,
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EndHyphenEdit::INSERT_HYPHEN);
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EXPECT_EQ(90.0f, layout.getAdvance());
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}
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}
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TEST_F(LayoutTest, measuredTextTest) {
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// The test font has following coverage and width.
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// U+0020: 10em
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// U+002E (.): 10em
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// U+0043 (C): 100em
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// U+0049 (I): 1em
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// U+004C (L): 50em
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// U+0056 (V): 5em
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// U+0058 (X): 10em
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// U+005F (_): 0em
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// U+FFFD (invalid surrogate will be replaced to this): 7em
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// U+10331 (\uD800\uDF31): 10em
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auto fc = buildFontCollection("LayoutTestFont.ttf");
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{
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MinikinPaint paint(fc);
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std::vector<uint16_t> text = utf8ToUtf16("I");
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std::vector<float> advances(text.size());
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Range range(0, text.size());
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EXPECT_EQ(1.0f, Layout::measureText(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT, advances.data()));
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ASSERT_EQ(1u, advances.size());
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EXPECT_EQ(1.0f, advances[0]);
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}
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{
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MinikinPaint paint(fc);
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std::vector<uint16_t> text = utf8ToUtf16("IV");
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std::vector<float> advances(text.size());
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Range range(0, text.size());
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EXPECT_EQ(6.0f, Layout::measureText(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT, advances.data()));
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ASSERT_EQ(2u, advances.size());
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EXPECT_EQ(1.0f, advances[0]);
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EXPECT_EQ(5.0f, advances[1]);
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}
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{
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MinikinPaint paint(fc);
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std::vector<uint16_t> text = utf8ToUtf16("IVX");
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std::vector<float> advances(text.size());
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Range range(0, text.size());
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EXPECT_EQ(16.0f,
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Layout::measureText(text, range, Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT, advances.data()));
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ASSERT_EQ(3u, advances.size());
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EXPECT_EQ(1.0f, advances[0]);
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EXPECT_EQ(5.0f, advances[1]);
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EXPECT_EQ(10.0f, advances[2]);
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}
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}
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// TODO: Add more test cases, e.g. measure text, letter spacing.
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} // namespace minikin
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