/* * Copyright 2014 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "SkPaint.h" #include "SkPoint.h" #include "SkSerialProcs.h" #include "SkTextBlobPriv.h" #include "SkTo.h" #include "SkTypeface.h" #include "Test.h" #include "sk_tool_utils.h" class TextBlobTester { public: // This unit test feeds an SkTextBlobBuilder various runs then checks to see if // the result contains the provided data and merges runs when appropriate. static void TestBuilder(skiatest::Reporter* reporter) { SkTextBlobBuilder builder; // empty run set RunBuilderTest(reporter, builder, nullptr, 0, nullptr, 0); RunDef set1[] = { { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 100 }, }; RunBuilderTest(reporter, builder, set1, SK_ARRAY_COUNT(set1), set1, SK_ARRAY_COUNT(set1)); RunDef set2[] = { { 128, SkTextBlobRunIterator::kHorizontal_Positioning, 100, 100 }, }; RunBuilderTest(reporter, builder, set2, SK_ARRAY_COUNT(set2), set2, SK_ARRAY_COUNT(set2)); RunDef set3[] = { { 128, SkTextBlobRunIterator::kFull_Positioning, 100, 100 }, }; RunBuilderTest(reporter, builder, set3, SK_ARRAY_COUNT(set3), set3, SK_ARRAY_COUNT(set3)); RunDef set4[] = { { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 150 }, { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 150 }, { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 150 }, }; RunBuilderTest(reporter, builder, set4, SK_ARRAY_COUNT(set4), set4, SK_ARRAY_COUNT(set4)); RunDef set5[] = { { 128, SkTextBlobRunIterator::kHorizontal_Positioning, 100, 150 }, { 128, SkTextBlobRunIterator::kHorizontal_Positioning, 200, 150 }, { 128, SkTextBlobRunIterator::kHorizontal_Positioning, 300, 250 }, }; RunDef mergedSet5[] = { { 256, SkTextBlobRunIterator::kHorizontal_Positioning, 0, 150 }, { 128, SkTextBlobRunIterator::kHorizontal_Positioning, 0, 250 }, }; RunBuilderTest(reporter, builder, set5, SK_ARRAY_COUNT(set5), mergedSet5, SK_ARRAY_COUNT(mergedSet5)); RunDef set6[] = { { 128, SkTextBlobRunIterator::kFull_Positioning, 100, 100 }, { 128, SkTextBlobRunIterator::kFull_Positioning, 200, 200 }, { 128, SkTextBlobRunIterator::kFull_Positioning, 300, 300 }, }; RunDef mergedSet6[] = { { 384, SkTextBlobRunIterator::kFull_Positioning, 0, 0 }, }; RunBuilderTest(reporter, builder, set6, SK_ARRAY_COUNT(set6), mergedSet6, SK_ARRAY_COUNT(mergedSet6)); RunDef set7[] = { { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 150 }, { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 150 }, { 128, SkTextBlobRunIterator::kHorizontal_Positioning, 100, 150 }, { 128, SkTextBlobRunIterator::kHorizontal_Positioning, 200, 150 }, { 128, SkTextBlobRunIterator::kFull_Positioning, 400, 350 }, { 128, SkTextBlobRunIterator::kFull_Positioning, 400, 350 }, { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 450 }, { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 450 }, { 128, SkTextBlobRunIterator::kHorizontal_Positioning, 100, 550 }, { 128, SkTextBlobRunIterator::kHorizontal_Positioning, 200, 650 }, { 128, SkTextBlobRunIterator::kFull_Positioning, 400, 750 }, { 128, SkTextBlobRunIterator::kFull_Positioning, 400, 850 }, }; RunDef mergedSet7[] = { { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 150 }, { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 150 }, { 256, SkTextBlobRunIterator::kHorizontal_Positioning, 0, 150 }, { 256, SkTextBlobRunIterator::kFull_Positioning, 0, 0 }, { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 450 }, { 128, SkTextBlobRunIterator::kDefault_Positioning, 100, 450 }, { 128, SkTextBlobRunIterator::kHorizontal_Positioning, 0, 550 }, { 128, SkTextBlobRunIterator::kHorizontal_Positioning, 0, 650 }, { 256, SkTextBlobRunIterator::kFull_Positioning, 0, 0 }, }; RunBuilderTest(reporter, builder, set7, SK_ARRAY_COUNT(set7), mergedSet7, SK_ARRAY_COUNT(mergedSet7)); } // This unit test verifies blob bounds computation. static void TestBounds(skiatest::Reporter* reporter) { SkTextBlobBuilder builder; SkFont font; // Explicit bounds. { sk_sp<SkTextBlob> blob(builder.make()); REPORTER_ASSERT(reporter, !blob); } { SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20); builder.allocRun(font, 16, 0, 0, &r1); sk_sp<SkTextBlob> blob(builder.make()); REPORTER_ASSERT(reporter, blob->bounds() == r1); } { SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20); builder.allocRunPosH(font, 16, 0, &r1); sk_sp<SkTextBlob> blob(builder.make()); REPORTER_ASSERT(reporter, blob->bounds() == r1); } { SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20); builder.allocRunPos(font, 16, &r1); sk_sp<SkTextBlob> blob(builder.make()); REPORTER_ASSERT(reporter, blob->bounds() == r1); } { SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20); SkRect r2 = SkRect::MakeXYWH(15, 20, 50, 50); SkRect r3 = SkRect::MakeXYWH(0, 5, 10, 5); builder.allocRun(font, 16, 0, 0, &r1); builder.allocRunPosH(font, 16, 0, &r2); builder.allocRunPos(font, 16, &r3); sk_sp<SkTextBlob> blob(builder.make()); REPORTER_ASSERT(reporter, blob->bounds() == SkRect::MakeXYWH(0, 5, 65, 65)); } { sk_sp<SkTextBlob> blob(builder.make()); REPORTER_ASSERT(reporter, !blob); } // Implicit bounds { // Exercise the empty bounds path, and ensure that RunRecord-aligned pos buffers // don't trigger asserts (http://crbug.com/542643). SkFont font; font.setSize(0); const char* txt = "BOOO"; const size_t txtLen = strlen(txt); const int glyphCount = font.countText(txt, txtLen, kUTF8_SkTextEncoding); const SkTextBlobBuilder::RunBuffer& buffer = builder.allocRunPos(font, glyphCount); font.textToGlyphs(txt, txtLen, kUTF8_SkTextEncoding, buffer.glyphs, glyphCount); memset(buffer.pos, 0, sizeof(SkScalar) * glyphCount * 2); sk_sp<SkTextBlob> blob(builder.make()); REPORTER_ASSERT(reporter, blob->bounds().isEmpty()); } } // Verify that text-related properties are captured in run paints. static void TestPaintProps(skiatest::Reporter* reporter) { SkFont font; // Kitchen sink font. font.setSize(42); font.setScaleX(4.2f); font.setTypeface(sk_tool_utils::create_portable_typeface()); font.setSkewX(0.42f); font.setHinting(kFull_SkFontHinting); font.setEdging(SkFont::Edging::kSubpixelAntiAlias); font.setEmbolden(true); font.setLinearMetrics(true); font.setSubpixel(true); font.setEmbeddedBitmaps(true); font.setForceAutoHinting(true); // Ensure we didn't pick default values by mistake. SkFont defaultFont; REPORTER_ASSERT(reporter, defaultFont.getSize() != font.getSize()); REPORTER_ASSERT(reporter, defaultFont.getScaleX() != font.getScaleX()); REPORTER_ASSERT(reporter, defaultFont.getTypeface() != font.getTypeface()); REPORTER_ASSERT(reporter, defaultFont.getSkewX() != font.getSkewX()); REPORTER_ASSERT(reporter, defaultFont.getHinting() != font.getHinting()); REPORTER_ASSERT(reporter, defaultFont.getEdging() != font.getEdging()); REPORTER_ASSERT(reporter, defaultFont.isEmbolden() != font.isEmbolden()); REPORTER_ASSERT(reporter, defaultFont.isLinearMetrics() != font.isLinearMetrics()); REPORTER_ASSERT(reporter, defaultFont.isSubpixel() != font.isSubpixel()); REPORTER_ASSERT(reporter, defaultFont.isEmbeddedBitmaps() != font.isEmbeddedBitmaps()); REPORTER_ASSERT(reporter, defaultFont.isForceAutoHinting() != font.isForceAutoHinting()); SkTextBlobBuilder builder; AddRun(font, 1, SkTextBlobRunIterator::kDefault_Positioning, SkPoint::Make(0, 0), builder); AddRun(font, 1, SkTextBlobRunIterator::kHorizontal_Positioning, SkPoint::Make(0, 0), builder); AddRun(font, 1, SkTextBlobRunIterator::kFull_Positioning, SkPoint::Make(0, 0), builder); sk_sp<SkTextBlob> blob(builder.make()); SkTextBlobRunIterator it(blob.get()); while (!it.done()) { SkPaint paint; it.applyFontToPaint(&paint); // need iter for fonts SkFont iterFont = SkFont::LEGACY_ExtractFromPaint(paint); REPORTER_ASSERT(reporter, iterFont == font); it.next(); } } private: struct RunDef { unsigned count; SkTextBlobRunIterator::GlyphPositioning pos; SkScalar x, y; }; static void RunBuilderTest(skiatest::Reporter* reporter, SkTextBlobBuilder& builder, const RunDef in[], unsigned inCount, const RunDef out[], unsigned outCount) { SkFont font; unsigned glyphCount = 0; unsigned posCount = 0; for (unsigned i = 0; i < inCount; ++i) { AddRun(font, in[i].count, in[i].pos, SkPoint::Make(in[i].x, in[i].y), builder); glyphCount += in[i].count; posCount += in[i].count * in[i].pos; } sk_sp<SkTextBlob> blob(builder.make()); REPORTER_ASSERT(reporter, (inCount > 0) == SkToBool(blob)); if (!blob) { return; } SkTextBlobRunIterator it(blob.get()); for (unsigned i = 0; i < outCount; ++i) { REPORTER_ASSERT(reporter, !it.done()); REPORTER_ASSERT(reporter, out[i].pos == it.positioning()); REPORTER_ASSERT(reporter, out[i].count == it.glyphCount()); if (SkTextBlobRunIterator::kDefault_Positioning == out[i].pos) { REPORTER_ASSERT(reporter, out[i].x == it.offset().x()); REPORTER_ASSERT(reporter, out[i].y == it.offset().y()); } else if (SkTextBlobRunIterator::kHorizontal_Positioning == out[i].pos) { REPORTER_ASSERT(reporter, out[i].y == it.offset().y()); } for (unsigned k = 0; k < it.glyphCount(); ++k) { REPORTER_ASSERT(reporter, k % 128 == it.glyphs()[k]); if (SkTextBlobRunIterator::kHorizontal_Positioning == it.positioning()) { REPORTER_ASSERT(reporter, SkIntToScalar(k % 128) == it.pos()[k]); } else if (SkTextBlobRunIterator::kFull_Positioning == it.positioning()) { REPORTER_ASSERT(reporter, SkIntToScalar(k % 128) == it.pos()[k * 2]); REPORTER_ASSERT(reporter, -SkIntToScalar(k % 128) == it.pos()[k * 2 + 1]); } } it.next(); } REPORTER_ASSERT(reporter, it.done()); } static void AddRun(const SkFont& font, int count, SkTextBlobRunIterator::GlyphPositioning pos, const SkPoint& offset, SkTextBlobBuilder& builder, const SkRect* bounds = nullptr) { switch (pos) { case SkTextBlobRunIterator::kDefault_Positioning: { const SkTextBlobBuilder::RunBuffer& rb = builder.allocRun(font, count, offset.x(), offset.y(), bounds); for (int i = 0; i < count; ++i) { rb.glyphs[i] = i; } } break; case SkTextBlobRunIterator::kHorizontal_Positioning: { const SkTextBlobBuilder::RunBuffer& rb = builder.allocRunPosH(font, count, offset.y(), bounds); for (int i = 0; i < count; ++i) { rb.glyphs[i] = i; rb.pos[i] = SkIntToScalar(i); } } break; case SkTextBlobRunIterator::kFull_Positioning: { const SkTextBlobBuilder::RunBuffer& rb = builder.allocRunPos(font, count, bounds); for (int i = 0; i < count; ++i) { rb.glyphs[i] = i; rb.pos[i * 2] = SkIntToScalar(i); rb.pos[i * 2 + 1] = -SkIntToScalar(i); } } break; default: SK_ABORT("unhandled positioning value"); } } }; DEF_TEST(TextBlob_builder, reporter) { TextBlobTester::TestBuilder(reporter); TextBlobTester::TestBounds(reporter); } DEF_TEST(TextBlob_paint, reporter) { TextBlobTester::TestPaintProps(reporter); } DEF_TEST(TextBlob_extended, reporter) { SkTextBlobBuilder textBlobBuilder; SkFont font; const char text1[] = "Foo"; const char text2[] = "Bar"; int glyphCount = font.countText(text1, strlen(text1), kUTF8_SkTextEncoding); SkAutoTMalloc<uint16_t> glyphs(glyphCount); (void)font.textToGlyphs(text1, strlen(text1), kUTF8_SkTextEncoding, glyphs.get(), glyphCount); auto run = SkTextBlobBuilderPriv::AllocRunText(&textBlobBuilder, font, glyphCount, 0, 0, SkToInt(strlen(text2)), SkString(), nullptr); memcpy(run.glyphs, glyphs.get(), sizeof(uint16_t) * glyphCount); memcpy(run.utf8text, text2, strlen(text2)); for (int i = 0; i < glyphCount; ++i) { run.clusters[i] = SkTMin(SkToU32(i), SkToU32(strlen(text2))); } sk_sp<SkTextBlob> blob(textBlobBuilder.make()); REPORTER_ASSERT(reporter, blob); for (SkTextBlobRunIterator it(blob.get()); !it.done(); it.next()) { REPORTER_ASSERT(reporter, it.glyphCount() == (uint32_t)glyphCount); for (uint32_t i = 0; i < it.glyphCount(); ++i) { REPORTER_ASSERT(reporter, it.glyphs()[i] == glyphs[i]); } REPORTER_ASSERT(reporter, SkTextBlobRunIterator::kDefault_Positioning == it.positioning()); REPORTER_ASSERT(reporter, (SkPoint{0.0f, 0.0f}) == it.offset()); REPORTER_ASSERT(reporter, it.textSize() > 0); REPORTER_ASSERT(reporter, it.clusters()); for (uint32_t i = 0; i < it.glyphCount(); ++i) { REPORTER_ASSERT(reporter, i == it.clusters()[i]); } REPORTER_ASSERT(reporter, 0 == strncmp(text2, it.text(), it.textSize())); } } /////////////////////////////////////////////////////////////////////////////////////////////////// #include "SkCanvas.h" #include "SkSurface.h" #include "SkTDArray.h" static void add_run(SkTextBlobBuilder* builder, const char text[], SkScalar x, SkScalar y, sk_sp<SkTypeface> tf) { SkFont font; font.setEdging(SkFont::Edging::kAntiAlias); font.setSubpixel(true); font.setSize(16); font.setTypeface(tf); int glyphCount = font.countText(text, strlen(text), kUTF8_SkTextEncoding); SkTextBlobBuilder::RunBuffer buffer = builder->allocRun(font, glyphCount, x, y); (void)font.textToGlyphs(text, strlen(text), kUTF8_SkTextEncoding, buffer.glyphs, glyphCount); } static sk_sp<SkImage> render(const SkTextBlob* blob) { auto surf = SkSurface::MakeRasterN32Premul(SkScalarRoundToInt(blob->bounds().width()), SkScalarRoundToInt(blob->bounds().height())); if (!surf) { return nullptr; // bounds are empty? } surf->getCanvas()->clear(SK_ColorWHITE); surf->getCanvas()->drawTextBlob(blob, -blob->bounds().left(), -blob->bounds().top(), SkPaint()); return surf->makeImageSnapshot(); } static sk_sp<SkData> SerializeTypeface(SkTypeface* tf, void* ctx) { auto array = (SkTDArray<SkTypeface*>*)ctx; *array->append() = tf; return sk_sp<SkData>(nullptr); } static sk_sp<SkTypeface> DeserializeTypeface(const void* data, size_t length, void* ctx) { auto array = (SkTDArray<SkTypeface*>*)ctx; for (int i = 0; i < array->count(); ++i) { auto result = (*array)[i]; if (result) { (*array)[i] = nullptr; return sk_ref_sp(result); } } SkASSERT(false); return sk_sp<SkTypeface>(nullptr); } /* * Build a blob with more than one typeface. * Draw it into an offscreen, * then serialize and deserialize, * Then draw the new instance and assert it draws the same as the original. */ DEF_TEST(TextBlob_serialize, reporter) { sk_sp<SkTextBlob> blob0 = []() { sk_sp<SkTypeface> tf = SkTypeface::MakeDefault(); SkTextBlobBuilder builder; add_run(&builder, "Hello", 10, 20, nullptr); // we don't flatten this in the paint add_run(&builder, "World", 10, 40, tf); // we will flatten this in the paint return builder.make(); }(); SkTDArray<SkTypeface*> array; SkSerialProcs serializeProcs; serializeProcs.fTypefaceProc = &SerializeTypeface; serializeProcs.fTypefaceCtx = (void*) &array; sk_sp<SkData> data = blob0->serialize(serializeProcs); REPORTER_ASSERT(reporter, array.count() == 2); SkDeserialProcs deserializeProcs; deserializeProcs.fTypefaceProc = &DeserializeTypeface; deserializeProcs.fTypefaceCtx = (void*) &array; sk_sp<SkTextBlob> blob1 = SkTextBlob::Deserialize(data->data(), data->size(), deserializeProcs); sk_sp<SkImage> img0 = render(blob0.get()); sk_sp<SkImage> img1 = render(blob1.get()); if (img0 && img1) { REPORTER_ASSERT(reporter, sk_tool_utils::equal_pixels(img0.get(), img1.get())); } } DEF_TEST(TextBlob_MakeAsDrawText, reporter) { const char text[] = "Hello"; auto blob = SkTextBlob::MakeFromString(text, SkFont(), kUTF8_SkTextEncoding); int runs = 0; for(SkTextBlobRunIterator it(blob.get()); !it.done(); it.next()) { REPORTER_ASSERT(reporter, it.glyphCount() == strlen(text)); REPORTER_ASSERT(reporter, it.positioning() == SkTextBlobRunIterator::kFull_Positioning); runs += 1; } REPORTER_ASSERT(reporter, runs == 1); }