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- /*
- * Copyright 2012 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/core/SkFont.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkStream.h"
- #include "include/core/SkTypeface.h"
- #include "src/core/SkAutoMalloc.h"
- #include "src/core/SkEndian.h"
- #include "src/core/SkFontStream.h"
- #include "src/core/SkOSFile.h"
- #include "tests/Test.h"
- #include "tools/Resources.h"
- //#define DUMP_TABLES
- //#define DUMP_TTC_TABLES
- #define kFontTableTag_head SkSetFourByteTag('h', 'e', 'a', 'd')
- #define kFontTableTag_hhea SkSetFourByteTag('h', 'h', 'e', 'a')
- #define kFontTableTag_maxp SkSetFourByteTag('m', 'a', 'x', 'p')
- static const struct TagSize {
- SkFontTableTag fTag;
- size_t fSize;
- } gKnownTableSizes[] = {
- { kFontTableTag_head, 54 },
- { kFontTableTag_hhea, 36 },
- };
- // Test that getUnitsPerEm() agrees with a direct lookup in the 'head' table
- // (if that table is available).
- static void test_unitsPerEm(skiatest::Reporter* reporter, const sk_sp<SkTypeface>& face) {
- int nativeUPEM = face->getUnitsPerEm();
- int tableUPEM = -1;
- size_t size = face->getTableSize(kFontTableTag_head);
- if (size) {
- // unitsPerEm is at offset 18 into the 'head' table.
- uint16_t rawUPEM;
- face->getTableData(kFontTableTag_head, 18, sizeof(rawUPEM), &rawUPEM);
- tableUPEM = SkEndian_SwapBE16(rawUPEM);
- }
- if (tableUPEM >= 0) {
- REPORTER_ASSERT(reporter, tableUPEM == nativeUPEM);
- }
- }
- // Test that countGlyphs() agrees with a direct lookup in the 'maxp' table
- // (if that table is available).
- static void test_countGlyphs(skiatest::Reporter* reporter, const sk_sp<SkTypeface>& face) {
- int nativeGlyphs = face->countGlyphs();
- int tableGlyphs = -1;
- size_t size = face->getTableSize(kFontTableTag_maxp);
- if (size) {
- // glyphs is at offset 4 into the 'maxp' table.
- uint16_t rawGlyphs;
- face->getTableData(kFontTableTag_maxp, 4, sizeof(rawGlyphs), &rawGlyphs);
- tableGlyphs = SkEndian_SwapBE16(rawGlyphs);
- }
- if (tableGlyphs >= 0) {
- REPORTER_ASSERT(reporter, tableGlyphs == nativeGlyphs);
- }
- }
- static void test_fontstream(skiatest::Reporter* reporter, SkStream* stream, int ttcIndex) {
- int n = SkFontStream::GetTableTags(stream, ttcIndex, nullptr);
- SkAutoTArray<SkFontTableTag> array(n);
- int n2 = SkFontStream::GetTableTags(stream, ttcIndex, array.get());
- REPORTER_ASSERT(reporter, n == n2);
- for (int i = 0; i < n; ++i) {
- #ifdef DUMP_TTC_TABLES
- SkString str;
- SkFontTableTag t = array[i];
- str.appendUnichar((t >> 24) & 0xFF);
- str.appendUnichar((t >> 16) & 0xFF);
- str.appendUnichar((t >> 8) & 0xFF);
- str.appendUnichar((t >> 0) & 0xFF);
- SkDebugf("[%d:%d] '%s'\n", ttcIndex, i, str.c_str());
- #endif
- size_t size = SkFontStream::GetTableSize(stream, ttcIndex, array[i]);
- for (size_t j = 0; j < SK_ARRAY_COUNT(gKnownTableSizes); ++j) {
- if (gKnownTableSizes[j].fTag == array[i]) {
- REPORTER_ASSERT(reporter, gKnownTableSizes[j].fSize == size);
- }
- }
- }
- }
- static void test_fontstream(skiatest::Reporter* reporter) {
- std::unique_ptr<SkStreamAsset> stream(GetResourceAsStream("fonts/test.ttc"));
- if (!stream) {
- SkDebugf("Skipping FontHostTest::test_fontstream\n");
- return;
- }
- int count = SkFontStream::CountTTCEntries(stream.get());
- #ifdef DUMP_TTC_TABLES
- SkDebugf("CountTTCEntries %d\n", count);
- #endif
- for (int i = 0; i < count; ++i) {
- test_fontstream(reporter, stream.get(), i);
- }
- }
- // Exercise this rare cmap format (platform 3, encoding 0)
- static void test_symbolfont(skiatest::Reporter* reporter) {
- auto tf = MakeResourceAsTypeface("fonts/SpiderSymbol.ttf");
- if (tf) {
- SkUnichar c = 0xf021;
- uint16_t g = SkFont(tf).unicharToGlyph(c);
- REPORTER_ASSERT(reporter, g == 3);
- } else {
- // not all platforms support data fonts, so we just note that failure
- SkDebugf("Skipping FontHostTest::test_symbolfont\n");
- }
- }
- static void test_tables(skiatest::Reporter* reporter, const sk_sp<SkTypeface>& face) {
- if (false) { // avoid bit rot, suppress warning
- SkFontID fontID = face->uniqueID();
- REPORTER_ASSERT(reporter, fontID);
- }
- int count = face->countTables();
- SkAutoTMalloc<SkFontTableTag> storage(count);
- SkFontTableTag* tags = storage.get();
- int count2 = face->getTableTags(tags);
- REPORTER_ASSERT(reporter, count2 == count);
- for (int i = 0; i < count; ++i) {
- size_t size = face->getTableSize(tags[i]);
- REPORTER_ASSERT(reporter, size > 0);
- #ifdef DUMP_TABLES
- char name[5];
- name[0] = (tags[i] >> 24) & 0xFF;
- name[1] = (tags[i] >> 16) & 0xFF;
- name[2] = (tags[i] >> 8) & 0xFF;
- name[3] = (tags[i] >> 0) & 0xFF;
- name[4] = 0;
- SkDebugf("%s %d\n", name, size);
- #endif
- for (size_t j = 0; j < SK_ARRAY_COUNT(gKnownTableSizes); ++j) {
- if (gKnownTableSizes[j].fTag == tags[i]) {
- REPORTER_ASSERT(reporter, gKnownTableSizes[j].fSize == size);
- }
- }
- // do we get the same size from GetTableData and GetTableSize
- {
- SkAutoMalloc data(size);
- size_t size2 = face->getTableData(tags[i], 0, size, data.get());
- REPORTER_ASSERT(reporter, size2 == size);
- sk_sp<SkData> data2 = face->copyTableData(tags[i]);
- REPORTER_ASSERT(reporter, size == data2->size());
- REPORTER_ASSERT(reporter, !memcmp(data.get(), data2->data(), size));
- }
- }
- }
- static void test_tables(skiatest::Reporter* reporter) {
- static const char* const gNames[] = {
- nullptr, // default font
- "Helvetica", "Arial",
- "Times", "Times New Roman",
- "Courier", "Courier New",
- "Terminal", "MS Sans Serif",
- "Hiragino Mincho ProN", "MS PGothic",
- };
- for (size_t i = 0; i < SK_ARRAY_COUNT(gNames); ++i) {
- sk_sp<SkTypeface> face(SkTypeface::MakeFromName(gNames[i], SkFontStyle()));
- if (face) {
- #ifdef DUMP_TABLES
- SkDebugf("%s\n", gNames[i]);
- #endif
- test_tables(reporter, face);
- test_unitsPerEm(reporter, face);
- test_countGlyphs(reporter, face);
- }
- }
- }
- /*
- * Verifies that the advance values returned by generateAdvance and
- * generateMetrics match.
- */
- static void test_advances(skiatest::Reporter* reporter) {
- static const char* const faces[] = {
- nullptr, // default font
- "Arial", "Times", "Times New Roman", "Helvetica", "Courier",
- "Courier New", "Verdana", "monospace",
- };
- static const struct {
- SkFontHinting hinting;
- bool linear;
- bool subpixel;
- } settings[] = {
- { SkFontHinting::kNone, false, false },
- { SkFontHinting::kNone, true, false },
- { SkFontHinting::kNone, false, true },
- { SkFontHinting::kSlight, false, false },
- { SkFontHinting::kSlight, true, false },
- { SkFontHinting::kSlight, false, true },
- { SkFontHinting::kNormal, false, false },
- { SkFontHinting::kNormal, true, false },
- { SkFontHinting::kNormal, false, true },
- };
- static const struct {
- SkScalar fScaleX;
- SkScalar fSkewX;
- } gScaleRec[] = {
- { SK_Scalar1, 0 },
- { SK_Scalar1/2, 0 },
- // these two exercise obliquing (skew)
- { SK_Scalar1, -SK_Scalar1/4 },
- { SK_Scalar1/2, -SK_Scalar1/4 },
- };
- SkFont font;
- char const * const txt = "long.text.with.lots.of.dots.";
- size_t textLen = strlen(txt);
- for (size_t i = 0; i < SK_ARRAY_COUNT(faces); i++) {
- font.setTypeface(SkTypeface::MakeFromName(faces[i], SkFontStyle()));
- for (size_t j = 0; j < SK_ARRAY_COUNT(settings); j++) {
- font.setHinting(settings[j].hinting);
- font.setLinearMetrics(settings[j].linear);
- font.setSubpixel(settings[j].subpixel);
- for (size_t k = 0; k < SK_ARRAY_COUNT(gScaleRec); ++k) {
- font.setScaleX(gScaleRec[k].fScaleX);
- font.setSkewX(gScaleRec[k].fSkewX);
- SkRect bounds;
- // For no hinting and light hinting this should take the
- // optimized generateAdvance path.
- SkScalar width1 = font.measureText(txt, textLen, SkTextEncoding::kUTF8);
- // Requesting the bounds forces a generateMetrics call.
- SkScalar width2 = font.measureText(txt, textLen, SkTextEncoding::kUTF8, &bounds);
- // SkDebugf("Font: %s, generateAdvance: %f, generateMetrics: %f\n",
- // faces[i], SkScalarToFloat(width1), SkScalarToFloat(width2));
- REPORTER_ASSERT(reporter, width1 == width2);
- }
- }
- }
- }
- DEF_TEST(FontHost, reporter) {
- test_tables(reporter);
- test_fontstream(reporter);
- test_advances(reporter);
- test_symbolfont(reporter);
- }
- // need tests for SkStrSearch
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