1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkTestScalerContext_DEFINED 9 #define SkTestScalerContext_DEFINED 10 11 #include "SkFixed.h" 12 #include "SkPaint.h" 13 #include "SkPath.h" 14 #include "SkRefCnt.h" 15 #include "SkTDArray.h" 16 #include "SkTypeface.h" 17 18 class SkTestFont; 19 20 struct SkTestFontData { 21 const SkScalar* fPoints; 22 const unsigned char* fVerbs; 23 const unsigned* fCharCodes; 24 const size_t fCharCodesCount; 25 const SkFixed* fWidths; 26 const SkPaint::FontMetrics& fMetrics; 27 const char* fName; 28 SkFontStyle fStyle; 29 sk_sp<SkTestFont> fCachedFont; 30 }; 31 32 class SkTestFont : public SkRefCnt { 33 public: 34 SkTestFont(const SkTestFontData& ); 35 virtual ~SkTestFont(); 36 int codeToIndex(SkUnichar charCode) const; 37 void init(const SkScalar* pts, const unsigned char* verbs); 38 private: 39 const unsigned* fCharCodes; 40 const size_t fCharCodesCount; 41 const SkFixed* fWidths; 42 const SkPaint::FontMetrics& fMetrics; 43 const char* fName; 44 SkPath** fPaths; 45 friend class SkTestTypeface; 46 typedef SkRefCnt INHERITED; 47 }; 48 49 50 class SkTestTypeface : public SkTypeface { 51 public: 52 SkTestTypeface(sk_sp<SkTestFont>, const SkFontStyle& style); 53 void getAdvance(SkGlyph* glyph); 54 void getFontMetrics(SkPaint::FontMetrics* metrics); 55 void getMetrics(SkGlyph* glyph); 56 void getPath(SkGlyphID glyph, SkPath* path); 57 protected: 58 SkScalerContext* onCreateScalerContext(const SkScalerContextEffects&, 59 const SkDescriptor* desc) const override; 60 void onFilterRec(SkScalerContextRec* rec) const override; 61 std::unique_ptr<SkAdvancedTypefaceMetrics> onGetAdvancedMetrics() const override; 62 onOpenStream(int * ttcIndex)63 SkStreamAsset* onOpenStream(int* ttcIndex) const override { 64 return nullptr; 65 } 66 67 void onGetFontDescriptor(SkFontDescriptor* desc, bool* isLocal) const override; 68 69 int onCharsToGlyphs(const void* chars, Encoding encoding, 70 uint16_t glyphs[], int glyphCount) const override; 71 onCountGlyphs()72 int onCountGlyphs() const override { 73 return (int) fTestFont->fCharCodesCount; 74 } 75 onGetUPEM()76 int onGetUPEM() const override { 77 return 2048; 78 } 79 80 void onGetFamilyName(SkString* familyName) const override; 81 SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override; 82 onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[],int coordinateCount)83 int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[], 84 int coordinateCount) const override 85 { 86 return 0; 87 } 88 onGetTableTags(SkFontTableTag tags[])89 int onGetTableTags(SkFontTableTag tags[]) const override { 90 return 0; 91 } 92 onGetTableData(SkFontTableTag tag,size_t offset,size_t length,void * data)93 size_t onGetTableData(SkFontTableTag tag, size_t offset, 94 size_t length, void* data) const override { 95 return 0; 96 } 97 private: 98 sk_sp<SkTestFont> fTestFont; 99 friend class SkTestScalerContext; 100 }; 101 102 #endif 103