| |
| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkTypes.h" // Keep this before any #ifdef ... |
| #if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) |
| |
| #ifdef SK_BUILD_FOR_MAC |
| #import <ApplicationServices/ApplicationServices.h> |
| #endif |
| |
| #ifdef SK_BUILD_FOR_IOS |
| #include <CoreText/CoreText.h> |
| #include <CoreText/CTFontManager.h> |
| #include <CoreGraphics/CoreGraphics.h> |
| #include <CoreFoundation/CoreFoundation.h> |
| #endif |
| |
| #include "SkAdvancedTypefaceMetrics.h" |
| #include "SkCGUtils.h" |
| #include "SkColorPriv.h" |
| #include "SkDescriptor.h" |
| #include "SkEndian.h" |
| #include "SkFloatingPoint.h" |
| #include "SkFontDescriptor.h" |
| #include "SkFontMgr.h" |
| #include "SkGlyph.h" |
| #include "SkMaskGamma.h" |
| #include "SkMutex.h" |
| #include "SkOTTable_glyf.h" |
| #include "SkOTTable_head.h" |
| #include "SkOTTable_hhea.h" |
| #include "SkOTTable_loca.h" |
| #include "SkOTUtils.h" |
| #include "SkOncePtr.h" |
| #include "SkPaint.h" |
| #include "SkPath.h" |
| #include "SkSFNTHeader.h" |
| #include "SkStream.h" |
| #include "SkString.h" |
| #include "SkTemplates.h" |
| #include "SkTypefaceCache.h" |
| #include "SkTypeface_mac.h" |
| #include "SkUtils.h" |
| #include "SkUtils.h" |
| |
| #include <dlfcn.h> |
| |
| // Experimental code to use a global lock whenever we access CG, to see if this reduces |
| // crashes in Chrome |
| #define USE_GLOBAL_MUTEX_FOR_CG_ACCESS |
| |
| #ifdef USE_GLOBAL_MUTEX_FOR_CG_ACCESS |
| SK_DECLARE_STATIC_MUTEX(gCGMutex); |
| #define AUTO_CG_LOCK() SkAutoMutexAcquire amc(gCGMutex) |
| #else |
| #define AUTO_CG_LOCK() |
| #endif |
| |
| // Set to make glyph bounding boxes visible. |
| #define SK_SHOW_TEXT_BLIT_COVERAGE 0 |
| |
| class SkScalerContext_Mac; |
| |
| // CTFontManagerCopyAvailableFontFamilyNames() is not always available, so we |
| // provide a wrapper here that will return an empty array if need be. |
| static CFArrayRef SkCTFontManagerCopyAvailableFontFamilyNames() { |
| #ifdef SK_BUILD_FOR_IOS |
| return CFArrayCreate(nullptr, nullptr, 0, nullptr); |
| #else |
| return CTFontManagerCopyAvailableFontFamilyNames(); |
| #endif |
| } |
| |
| |
| // Being templated and taking const T* prevents calling |
| // CFSafeRelease(autoCFRelease) through implicit conversion. |
| template <typename T> static void CFSafeRelease(/*CFTypeRef*/const T* cfTypeRef) { |
| if (cfTypeRef) { |
| CFRelease(cfTypeRef); |
| } |
| } |
| |
| // Being templated and taking const T* prevents calling |
| // CFSafeRetain(autoCFRelease) through implicit conversion. |
| template <typename T> static void CFSafeRetain(/*CFTypeRef*/const T* cfTypeRef) { |
| if (cfTypeRef) { |
| CFRetain(cfTypeRef); |
| } |
| } |
| |
| /** Acts like a CFRef, but calls CFSafeRelease when it goes out of scope. */ |
| template<typename CFRef> class AutoCFRelease : private SkNoncopyable { |
| public: |
| explicit AutoCFRelease(CFRef cfRef = nullptr) : fCFRef(cfRef) { } |
| ~AutoCFRelease() { CFSafeRelease(fCFRef); } |
| |
| void reset(CFRef that = nullptr) { |
| if (that != fCFRef) { |
| CFSafeRelease(fCFRef); |
| fCFRef = that; |
| } |
| } |
| |
| CFRef release() { |
| CFRef self = fCFRef; |
| fCFRef = nullptr; |
| return self; |
| } |
| |
| operator CFRef() const { return fCFRef; } |
| CFRef get() const { return fCFRef; } |
| |
| CFRef* operator&() { SkASSERT(fCFRef == nullptr); return &fCFRef; } |
| private: |
| CFRef fCFRef; |
| }; |
| |
| static CFStringRef make_CFString(const char str[]) { |
| return CFStringCreateWithCString(nullptr, str, kCFStringEncodingUTF8); |
| } |
| |
| template<typename T> class AutoCGTable : SkNoncopyable { |
| public: |
| AutoCGTable(CGFontRef font) |
| //Undocumented: the tag parameter in this call is expected in machine order and not BE order. |
| : fCFData(CGFontCopyTableForTag(font, SkSetFourByteTag(T::TAG0, T::TAG1, T::TAG2, T::TAG3))) |
| , fData(fCFData ? reinterpret_cast<const T*>(CFDataGetBytePtr(fCFData)) : nullptr) |
| { } |
| |
| const T* operator->() const { return fData; } |
| |
| private: |
| AutoCFRelease<CFDataRef> fCFData; |
| public: |
| const T* fData; |
| }; |
| |
| // inline versions of these rect helpers |
| |
| static bool CGRectIsEmpty_inline(const CGRect& rect) { |
| return rect.size.width <= 0 || rect.size.height <= 0; |
| } |
| |
| static CGFloat CGRectGetMinX_inline(const CGRect& rect) { |
| return rect.origin.x; |
| } |
| |
| static CGFloat CGRectGetMaxX_inline(const CGRect& rect) { |
| return rect.origin.x + rect.size.width; |
| } |
| |
| static CGFloat CGRectGetMinY_inline(const CGRect& rect) { |
| return rect.origin.y; |
| } |
| |
| static CGFloat CGRectGetMaxY_inline(const CGRect& rect) { |
| return rect.origin.y + rect.size.height; |
| } |
| |
| static CGFloat CGRectGetWidth_inline(const CGRect& rect) { |
| return rect.size.width; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static void sk_memset_rect32(uint32_t* ptr, uint32_t value, |
| int width, int height, size_t rowBytes) { |
| SkASSERT(width); |
| SkASSERT(width * sizeof(uint32_t) <= rowBytes); |
| |
| if (width >= 32) { |
| while (height) { |
| sk_memset32(ptr, value, width); |
| ptr = (uint32_t*)((char*)ptr + rowBytes); |
| height -= 1; |
| } |
| return; |
| } |
| |
| rowBytes -= width * sizeof(uint32_t); |
| |
| if (width >= 8) { |
| while (height) { |
| int w = width; |
| do { |
| *ptr++ = value; *ptr++ = value; |
| *ptr++ = value; *ptr++ = value; |
| *ptr++ = value; *ptr++ = value; |
| *ptr++ = value; *ptr++ = value; |
| w -= 8; |
| } while (w >= 8); |
| while (--w >= 0) { |
| *ptr++ = value; |
| } |
| ptr = (uint32_t*)((char*)ptr + rowBytes); |
| height -= 1; |
| } |
| } else { |
| while (height) { |
| int w = width; |
| do { |
| *ptr++ = value; |
| } while (--w > 0); |
| ptr = (uint32_t*)((char*)ptr + rowBytes); |
| height -= 1; |
| } |
| } |
| } |
| |
| #include <sys/utsname.h> |
| |
| typedef uint32_t CGRGBPixel; |
| |
| static unsigned CGRGBPixel_getAlpha(CGRGBPixel pixel) { |
| return pixel & 0xFF; |
| } |
| |
| static const char FONT_DEFAULT_NAME[] = "Lucida Sans"; |
| |
| // See Source/WebKit/chromium/base/mac/mac_util.mm DarwinMajorVersionInternal for original source. |
| static int readVersion() { |
| struct utsname info; |
| if (uname(&info) != 0) { |
| SkDebugf("uname failed\n"); |
| return 0; |
| } |
| if (strcmp(info.sysname, "Darwin") != 0) { |
| SkDebugf("unexpected uname sysname %s\n", info.sysname); |
| return 0; |
| } |
| char* dot = strchr(info.release, '.'); |
| if (!dot) { |
| SkDebugf("expected dot in uname release %s\n", info.release); |
| return 0; |
| } |
| int version = atoi(info.release); |
| if (version == 0) { |
| SkDebugf("could not parse uname release %s\n", info.release); |
| } |
| return version; |
| } |
| |
| static int darwinVersion() { |
| static int darwin_version = readVersion(); |
| return darwin_version; |
| } |
| |
| static bool isSnowLeopard() { |
| return darwinVersion() == 10; |
| } |
| |
| static bool isLion() { |
| return darwinVersion() == 11; |
| } |
| |
| static bool isMountainLion() { |
| return darwinVersion() == 12; |
| } |
| |
| static bool isLCDFormat(unsigned format) { |
| return SkMask::kLCD16_Format == format; |
| } |
| |
| static CGFloat ScalarToCG(SkScalar scalar) { |
| if (sizeof(CGFloat) == sizeof(float)) { |
| return SkScalarToFloat(scalar); |
| } else { |
| SkASSERT(sizeof(CGFloat) == sizeof(double)); |
| return (CGFloat) SkScalarToDouble(scalar); |
| } |
| } |
| |
| static SkScalar CGToScalar(CGFloat cgFloat) { |
| if (sizeof(CGFloat) == sizeof(float)) { |
| return cgFloat; |
| } else { |
| SkASSERT(sizeof(CGFloat) == sizeof(double)); |
| return SkDoubleToScalar(cgFloat); |
| } |
| } |
| |
| static CGAffineTransform MatrixToCGAffineTransform(const SkMatrix& matrix, |
| SkScalar sx = SK_Scalar1, |
| SkScalar sy = SK_Scalar1) { |
| return CGAffineTransformMake( ScalarToCG(matrix[SkMatrix::kMScaleX] * sx), |
| -ScalarToCG(matrix[SkMatrix::kMSkewY] * sy), |
| -ScalarToCG(matrix[SkMatrix::kMSkewX] * sx), |
| ScalarToCG(matrix[SkMatrix::kMScaleY] * sy), |
| ScalarToCG(matrix[SkMatrix::kMTransX] * sx), |
| ScalarToCG(matrix[SkMatrix::kMTransY] * sy)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #define BITMAP_INFO_RGB (kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Host) |
| |
| /** |
| * There does not appear to be a publicly accessable API for determining if lcd |
| * font smoothing will be applied if we request it. The main issue is that if |
| * smoothing is applied a gamma of 2.0 will be used, if not a gamma of 1.0. |
| */ |
| static bool supports_LCD() { |
| static int gSupportsLCD = -1; |
| if (gSupportsLCD >= 0) { |
| return (bool) gSupportsLCD; |
| } |
| uint32_t rgb = 0; |
| AutoCFRelease<CGColorSpaceRef> colorspace(CGColorSpaceCreateDeviceRGB()); |
| AutoCFRelease<CGContextRef> cgContext(CGBitmapContextCreate(&rgb, 1, 1, 8, 4, |
| colorspace, BITMAP_INFO_RGB)); |
| CGContextSelectFont(cgContext, "Helvetica", 16, kCGEncodingMacRoman); |
| CGContextSetShouldSmoothFonts(cgContext, true); |
| CGContextSetShouldAntialias(cgContext, true); |
| CGContextSetTextDrawingMode(cgContext, kCGTextFill); |
| CGContextSetGrayFillColor(cgContext, 1, 1); |
| CGContextShowTextAtPoint(cgContext, -1, 0, "|", 1); |
| uint32_t r = (rgb >> 16) & 0xFF; |
| uint32_t g = (rgb >> 8) & 0xFF; |
| uint32_t b = (rgb >> 0) & 0xFF; |
| gSupportsLCD = (r != g || r != b); |
| return (bool) gSupportsLCD; |
| } |
| |
| class Offscreen { |
| public: |
| Offscreen() |
| : fRGBSpace(nullptr) |
| , fCG(nullptr) |
| , fDoAA(false) |
| , fDoLCD(false) |
| { |
| fSize.set(0, 0); |
| } |
| |
| CGRGBPixel* getCG(const SkScalerContext_Mac& context, const SkGlyph& glyph, |
| CGGlyph glyphID, size_t* rowBytesPtr, |
| bool generateA8FromLCD); |
| |
| private: |
| enum { |
| kSize = 32 * 32 * sizeof(CGRGBPixel) |
| }; |
| SkAutoSMalloc<kSize> fImageStorage; |
| AutoCFRelease<CGColorSpaceRef> fRGBSpace; |
| |
| // cached state |
| AutoCFRelease<CGContextRef> fCG; |
| SkISize fSize; |
| bool fDoAA; |
| bool fDoLCD; |
| |
| static int RoundSize(int dimension) { |
| return SkNextPow2(dimension); |
| } |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static bool find_dict_float(CFDictionaryRef dict, CFStringRef name, float* value) { |
| CFNumberRef num; |
| return CFDictionaryGetValueIfPresent(dict, name, (const void**)&num) |
| && CFNumberIsFloatType(num) |
| && CFNumberGetValue(num, kCFNumberFloatType, value); |
| } |
| |
| static int unit_weight_to_fontstyle(float unit) { |
| float value; |
| if (unit < 0) { |
| value = 100 + (1 + unit) * 300; |
| } else { |
| value = 400 + unit * 500; |
| } |
| return sk_float_round2int(value); |
| } |
| |
| static int unit_width_to_fontstyle(float unit) { |
| float value; |
| if (unit < 0) { |
| value = 1 + (1 + unit) * 4; |
| } else { |
| value = 5 + unit * 4; |
| } |
| return sk_float_round2int(value); |
| } |
| |
| static SkFontStyle fontstyle_from_descriptor(CTFontDescriptorRef desc) { |
| AutoCFRelease<CFDictionaryRef> dict( |
| (CFDictionaryRef)CTFontDescriptorCopyAttribute(desc, kCTFontTraitsAttribute)); |
| if (nullptr == dict.get()) { |
| return SkFontStyle(); |
| } |
| |
| float weight, width, slant; |
| if (!find_dict_float(dict, kCTFontWeightTrait, &weight)) { |
| weight = 0; |
| } |
| if (!find_dict_float(dict, kCTFontWidthTrait, &width)) { |
| width = 0; |
| } |
| if (!find_dict_float(dict, kCTFontSlantTrait, &slant)) { |
| slant = 0; |
| } |
| |
| return SkFontStyle(unit_weight_to_fontstyle(weight), |
| unit_width_to_fontstyle(width), |
| slant ? SkFontStyle::kItalic_Slant |
| : SkFontStyle::kUpright_Slant); |
| } |
| |
| static SkTypeface::Style computeStyleBits(CTFontRef font, bool* isFixedPitch) { |
| unsigned style = SkTypeface::kNormal; |
| CTFontSymbolicTraits traits = CTFontGetSymbolicTraits(font); |
| |
| if (traits & kCTFontBoldTrait) { |
| style |= SkTypeface::kBold; |
| } |
| if (traits & kCTFontItalicTrait) { |
| style |= SkTypeface::kItalic; |
| } |
| if (isFixedPitch) { |
| *isFixedPitch = (traits & kCTFontMonoSpaceTrait) != 0; |
| } |
| return (SkTypeface::Style)style; |
| } |
| |
| #define WEIGHT_THRESHOLD ((SkFontStyle::kNormal_Weight + SkFontStyle::kBold_Weight)/2) |
| |
| // kCTFontColorGlyphsTrait was added in the Mac 10.7 and iPhone 4.3 SDKs. |
| // Being an enum value it is not guarded by version macros, but old SDKs must still be supported. |
| #if defined(__MAC_10_7) || defined(__IPHONE_4_3) |
| static const uint32_t SkCTFontColorGlyphsTrait = kCTFontColorGlyphsTrait; |
| #else |
| static const uint32_t SkCTFontColorGlyphsTrait = (1 << 13); |
| #endif |
| |
| class SkTypeface_Mac : public SkTypeface { |
| public: |
| SkTypeface_Mac(CTFontRef fontRef, CFTypeRef resourceRef, |
| const SkFontStyle& fs, bool isFixedPitch, |
| const char requestedName[], bool isLocalStream) |
| : SkTypeface(fs, SkTypefaceCache::NewFontID(), isFixedPitch) |
| , fRequestedName(requestedName) |
| , fFontRef(fontRef) // caller has already called CFRetain for us |
| , fOriginatingCFTypeRef(resourceRef) // caller has already called CFRetain for us |
| , fHasColorGlyphs(SkToBool(CTFontGetSymbolicTraits(fFontRef) & SkCTFontColorGlyphsTrait)) |
| , fIsLocalStream(isLocalStream) |
| { |
| SkASSERT(fontRef); |
| } |
| |
| SkString fRequestedName; |
| AutoCFRelease<CTFontRef> fFontRef; |
| AutoCFRelease<CFTypeRef> fOriginatingCFTypeRef; |
| const bool fHasColorGlyphs; |
| |
| protected: |
| int onGetUPEM() const override; |
| SkStreamAsset* onOpenStream(int* ttcIndex) const override; |
| SkFontData* onCreateFontData() const override; |
| void onGetFamilyName(SkString* familyName) const override; |
| SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override; |
| int onGetTableTags(SkFontTableTag tags[]) const override; |
| virtual size_t onGetTableData(SkFontTableTag, size_t offset, |
| size_t length, void* data) const override; |
| SkScalerContext* onCreateScalerContext(const SkDescriptor*) const override; |
| void onFilterRec(SkScalerContextRec*) const override; |
| void onGetFontDescriptor(SkFontDescriptor*, bool*) const override; |
| virtual SkAdvancedTypefaceMetrics* onGetAdvancedTypefaceMetrics( |
| PerGlyphInfo, |
| const uint32_t*, uint32_t) const override; |
| virtual int onCharsToGlyphs(const void* chars, Encoding, uint16_t glyphs[], |
| int glyphCount) const override; |
| int onCountGlyphs() const override; |
| |
| private: |
| bool fIsLocalStream; |
| |
| typedef SkTypeface INHERITED; |
| }; |
| |
| /** Creates a typeface without searching the cache. Takes ownership of the CTFontRef. */ |
| static SkTypeface* NewFromFontRef(CTFontRef fontRef, CFTypeRef resourceRef, |
| const char name[], bool isLocalStream) |
| { |
| SkASSERT(fontRef); |
| bool isFixedPitch; |
| SkFontStyle style = SkFontStyle(computeStyleBits(fontRef, &isFixedPitch)); |
| |
| return new SkTypeface_Mac(fontRef, resourceRef, style, isFixedPitch, name, isLocalStream); |
| } |
| |
| static bool find_by_CTFontRef(SkTypeface* cached, const SkFontStyle&, void* context) { |
| CTFontRef self = (CTFontRef)context; |
| CTFontRef other = ((SkTypeface_Mac*)cached)->fFontRef; |
| |
| return CFEqual(self, other); |
| } |
| |
| /** Creates a typeface from a name, searching the cache. */ |
| static SkTypeface* NewFromName(const char familyName[], const SkFontStyle& theStyle) { |
| CTFontSymbolicTraits ctFontTraits = 0; |
| if (theStyle.weight() >= SkFontStyle::kBold_Weight) { |
| ctFontTraits |= kCTFontBoldTrait; |
| } |
| if (theStyle.slant() != SkFontStyle::kUpright_Slant) { |
| ctFontTraits |= kCTFontItalicTrait; |
| } |
| |
| //TODO: add weight width slant |
| |
| // Create the font info |
| AutoCFRelease<CFStringRef> cfFontName(make_CFString(familyName)); |
| |
| AutoCFRelease<CFNumberRef> cfFontTraits( |
| CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &ctFontTraits)); |
| |
| AutoCFRelease<CFMutableDictionaryRef> cfAttributes( |
| CFDictionaryCreateMutable(kCFAllocatorDefault, 0, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks)); |
| |
| AutoCFRelease<CFMutableDictionaryRef> cfTraits( |
| CFDictionaryCreateMutable(kCFAllocatorDefault, 0, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks)); |
| |
| if (!cfFontName || !cfFontTraits || !cfAttributes || !cfTraits) { |
| return nullptr; |
| } |
| |
| CFDictionaryAddValue(cfTraits, kCTFontSymbolicTrait, cfFontTraits); |
| |
| CFDictionaryAddValue(cfAttributes, kCTFontFamilyNameAttribute, cfFontName); |
| CFDictionaryAddValue(cfAttributes, kCTFontTraitsAttribute, cfTraits); |
| |
| AutoCFRelease<CTFontDescriptorRef> ctFontDesc( |
| CTFontDescriptorCreateWithAttributes(cfAttributes)); |
| if (!ctFontDesc) { |
| return nullptr; |
| } |
| |
| AutoCFRelease<CTFontRef> ctFont(CTFontCreateWithFontDescriptor(ctFontDesc, 0, nullptr)); |
| if (!ctFont) { |
| return nullptr; |
| } |
| |
| SkTypeface* face = SkTypefaceCache::FindByProcAndRef(find_by_CTFontRef, (void*)ctFont.get()); |
| if (!face) { |
| face = NewFromFontRef(ctFont.release(), nullptr, nullptr, false); |
| SkTypefaceCache::Add(face, face->fontStyle()); |
| } |
| return face; |
| } |
| |
| SK_DECLARE_STATIC_MUTEX(gGetDefaultFaceMutex); |
| static SkTypeface* GetDefaultFace() { |
| SkAutoMutexAcquire ma(gGetDefaultFaceMutex); |
| |
| static SkTypeface* gDefaultFace; |
| |
| if (nullptr == gDefaultFace) { |
| gDefaultFace = NewFromName(FONT_DEFAULT_NAME, SkFontStyle()); |
| SkTypefaceCache::Add(gDefaultFace, SkFontStyle()); |
| } |
| return gDefaultFace; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| extern CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face); |
| CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face) { |
| const SkTypeface_Mac* macface = (const SkTypeface_Mac*)face; |
| return macface ? macface->fFontRef.get() : nullptr; |
| } |
| |
| /* This function is visible on the outside. It first searches the cache, and if |
| * not found, returns a new entry (after adding it to the cache). |
| */ |
| SkTypeface* SkCreateTypefaceFromCTFont(CTFontRef fontRef, CFTypeRef resourceRef) { |
| SkTypeface* face = SkTypefaceCache::FindByProcAndRef(find_by_CTFontRef, (void*)fontRef); |
| if (!face) { |
| CFRetain(fontRef); |
| if (resourceRef) { |
| CFRetain(resourceRef); |
| } |
| face = NewFromFontRef(fontRef, resourceRef, nullptr, false); |
| SkTypefaceCache::Add(face, face->fontStyle()); |
| } |
| return face; |
| } |
| |
| struct NameStyle { |
| const char* fName; |
| SkFontStyle fStyle; |
| }; |
| |
| static bool find_by_NameStyle(SkTypeface* cachedFace, const SkFontStyle& cachedStyle, void* ctx) { |
| const SkTypeface_Mac* cachedMacFace = static_cast<SkTypeface_Mac*>(cachedFace); |
| const NameStyle* requested = static_cast<const NameStyle*>(ctx); |
| |
| return cachedStyle == requested->fStyle |
| && cachedMacFace->fRequestedName.equals(requested->fName); |
| } |
| |
| static const char* map_css_names(const char* name) { |
| static const struct { |
| const char* fFrom; // name the caller specified |
| const char* fTo; // "canonical" name we map to |
| } gPairs[] = { |
| { "sans-serif", "Helvetica" }, |
| { "serif", "Times" }, |
| { "monospace", "Courier" } |
| }; |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gPairs); i++) { |
| if (strcmp(name, gPairs[i].fFrom) == 0) { |
| return gPairs[i].fTo; |
| } |
| } |
| return name; // no change |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /** GlyphRect is in FUnits (em space, y up). */ |
| struct GlyphRect { |
| int16_t fMinX; |
| int16_t fMinY; |
| int16_t fMaxX; |
| int16_t fMaxY; |
| }; |
| |
| class SkScalerContext_Mac : public SkScalerContext { |
| public: |
| SkScalerContext_Mac(SkTypeface_Mac*, const SkDescriptor*); |
| |
| protected: |
| unsigned generateGlyphCount(void) override; |
| uint16_t generateCharToGlyph(SkUnichar uni) override; |
| void generateAdvance(SkGlyph* glyph) override; |
| void generateMetrics(SkGlyph* glyph) override; |
| void generateImage(const SkGlyph& glyph) override; |
| void generatePath(const SkGlyph& glyph, SkPath* path) override; |
| void generateFontMetrics(SkPaint::FontMetrics*) override; |
| |
| private: |
| static void CTPathElement(void *info, const CGPathElement *element); |
| |
| /** Returns the offset from the horizontal origin to the vertical origin in SkGlyph units. */ |
| void getVerticalOffset(CGGlyph glyphID, SkPoint* offset) const; |
| |
| /** Initializes and returns the value of fFBoundingBoxesGlyphOffset. |
| * |
| * For use with (and must be called before) generateBBoxes. |
| */ |
| uint16_t getFBoundingBoxesGlyphOffset(); |
| |
| /** Initializes fFBoundingBoxes and returns true on success. |
| * |
| * On Lion and Mountain Lion, CTFontGetBoundingRectsForGlyphs has a bug which causes it to |
| * return a bad value in bounds.origin.x for SFNT fonts whose hhea::numberOfHMetrics is |
| * less than its maxp::numGlyphs. When this is the case we try to read the bounds from the |
| * font directly. |
| * |
| * This routine initializes fFBoundingBoxes to an array of |
| * fGlyphCount - fFBoundingBoxesGlyphOffset GlyphRects which contain the bounds in FUnits |
| * (em space, y up) of glyphs with ids in the range [fFBoundingBoxesGlyphOffset, fGlyphCount). |
| * |
| * Returns true if fFBoundingBoxes is properly initialized. The table can only be properly |
| * initialized for a TrueType font with 'head', 'loca', and 'glyf' tables. |
| * |
| * TODO: A future optimization will compute fFBoundingBoxes once per fCTFont. |
| */ |
| bool generateBBoxes(); |
| |
| /** Converts from FUnits (em space, y up) to SkGlyph units (pixels, y down). |
| * |
| * Used on Snow Leopard to correct CTFontGetVerticalTranslationsForGlyphs. |
| * Used on Lion to correct CTFontGetBoundingRectsForGlyphs. |
| */ |
| SkMatrix fFUnitMatrix; |
| |
| Offscreen fOffscreen; |
| |
| /** Unrotated variant of fCTFont. |
| * |
| * In 10.10.1 CTFontGetAdvancesForGlyphs applies the font transform to the width of the |
| * advances, but always sets the height to 0. This font is used to get the advances of the |
| * unrotated glyph, and then the rotation is applied separately. |
| * |
| * CT vertical metrics are pre-rotated (in em space, before transform) 90deg clock-wise. |
| * This makes kCTFontDefaultOrientation dangerous, because the metrics from |
| * kCTFontHorizontalOrientation are in a different space from kCTFontVerticalOrientation. |
| * With kCTFontVerticalOrientation the advances must be unrotated. |
| * |
| * Sometimes, creating a copy of a CTFont with the same size but different trasform will select |
| * different underlying font data. As a result, avoid ever creating more than one CTFont per |
| * SkScalerContext to ensure that only one CTFont is used. |
| * |
| * As a result of the above (and other constraints) this font contains the size, but not the |
| * transform. The transform must always be applied separately. |
| */ |
| AutoCFRelease<CTFontRef> fCTFont; |
| |
| /** The transform without the font size. */ |
| CGAffineTransform fTransform; |
| CGAffineTransform fInvTransform; |
| |
| AutoCFRelease<CGFontRef> fCGFont; |
| SkAutoTMalloc<GlyphRect> fFBoundingBoxes; |
| uint16_t fFBoundingBoxesGlyphOffset; |
| uint16_t fGlyphCount; |
| bool fGeneratedFBoundingBoxes; |
| const bool fDoSubPosition; |
| const bool fVertical; |
| |
| friend class Offscreen; |
| |
| typedef SkScalerContext INHERITED; |
| }; |
| |
| // CTFontCreateCopyWithAttributes or CTFontCreateCopyWithSymbolicTraits cannot be used on 10.10 |
| // and later, as they will return different underlying fonts depending on the size requested. |
| // It is not possible to use descriptors with CTFontCreateWithFontDescriptor, since that does not |
| // work with non-system fonts. As a result, create the strike specific CTFonts from the underlying |
| // CGFont. |
| static CTFontRef ctfont_create_exact_copy(CTFontRef baseFont, CGFloat textSize, |
| const CGAffineTransform* transform) |
| { |
| AutoCFRelease<CGFontRef> baseCGFont(CTFontCopyGraphicsFont(baseFont, nullptr)); |
| |
| // The last parameter (CTFontDescriptorRef attributes) *must* be nullptr. |
| // If non-nullptr then with fonts with variation axes, the copy will fail in |
| // CGFontVariationFromDictCallback when it assumes kCGFontVariationAxisName is CFNumberRef |
| // which it quite obviously is not. |
| |
| // Because we cannot setup the CTFont descriptor to match, the same restriction applies here |
| // as other uses of CTFontCreateWithGraphicsFont which is that such CTFonts should not escape |
| // the scaler context, since they aren't 'normal'. |
| return CTFontCreateWithGraphicsFont(baseCGFont, textSize, transform, nullptr); |
| } |
| |
| SkScalerContext_Mac::SkScalerContext_Mac(SkTypeface_Mac* typeface, |
| const SkDescriptor* desc) |
| : INHERITED(typeface, desc) |
| , fFBoundingBoxes() |
| , fFBoundingBoxesGlyphOffset(0) |
| , fGeneratedFBoundingBoxes(false) |
| , fDoSubPosition(SkToBool(fRec.fFlags & kSubpixelPositioning_Flag)) |
| , fVertical(SkToBool(fRec.fFlags & kVertical_Flag)) |
| |
| { |
| AUTO_CG_LOCK(); |
| |
| CTFontRef ctFont = typeface->fFontRef.get(); |
| CFIndex numGlyphs = CTFontGetGlyphCount(ctFont); |
| SkASSERT(numGlyphs >= 1 && numGlyphs <= 0xFFFF); |
| fGlyphCount = SkToU16(numGlyphs); |
| |
| // CT on (at least) 10.9 will size color glyphs down from the requested size, but not up. |
| // As a result, it is necessary to know the actual device size and request that. |
| SkVector scale; |
| SkMatrix skTransform; |
| fRec.computeMatrices(SkScalerContextRec::kVertical_PreMatrixScale, &scale, &skTransform, |
| nullptr, nullptr, &fFUnitMatrix); |
| fTransform = MatrixToCGAffineTransform(skTransform); |
| fInvTransform = CGAffineTransformInvert(fTransform); |
| |
| // The transform contains everything except the requested text size. |
| // Some properties, like 'trak', are based on the text size (before applying the matrix). |
| CGFloat textSize = ScalarToCG(scale.y()); |
| fCTFont.reset(ctfont_create_exact_copy(ctFont, textSize, nullptr)); |
| fCGFont.reset(CTFontCopyGraphicsFont(fCTFont, nullptr)); |
| |
| // The fUnitMatrix includes the text size (and em) as it is used to scale the raw font data. |
| SkScalar emPerFUnit = SkScalarInvert(SkIntToScalar(CGFontGetUnitsPerEm(fCGFont))); |
| fFUnitMatrix.preScale(emPerFUnit, -emPerFUnit); |
| } |
| |
| /** This is an implementation of CTFontDrawGlyphs for 10.6; it was introduced in 10.7. */ |
| static void legacy_CTFontDrawGlyphs(CTFontRef, const CGGlyph glyphs[], const CGPoint points[], |
| size_t count, CGContextRef cg) { |
| CGContextShowGlyphsAtPositions(cg, glyphs, points, count); |
| } |
| |
| typedef decltype(legacy_CTFontDrawGlyphs) CTFontDrawGlyphsProc; |
| |
| static CTFontDrawGlyphsProc* choose_CTFontDrawGlyphs() { |
| if (void* real = dlsym(RTLD_DEFAULT, "CTFontDrawGlyphs")) { |
| return (CTFontDrawGlyphsProc*)real; |
| } |
| return &legacy_CTFontDrawGlyphs; |
| } |
| |
| SK_DECLARE_STATIC_ONCE_PTR(CTFontDrawGlyphsProc, gCTFontDrawGlyphs); |
| |
| CGRGBPixel* Offscreen::getCG(const SkScalerContext_Mac& context, const SkGlyph& glyph, |
| CGGlyph glyphID, size_t* rowBytesPtr, |
| bool generateA8FromLCD) { |
| auto ctFontDrawGlyphs = gCTFontDrawGlyphs.get(choose_CTFontDrawGlyphs); |
| |
| if (!fRGBSpace) { |
| //It doesn't appear to matter what color space is specified. |
| //Regular blends and antialiased text are always (s*a + d*(1-a)) |
| //and smoothed text is always g=2.0. |
| fRGBSpace.reset(CGColorSpaceCreateDeviceRGB()); |
| } |
| |
| // default to kBW_Format |
| bool doAA = false; |
| bool doLCD = false; |
| |
| if (SkMask::kBW_Format != glyph.fMaskFormat) { |
| doLCD = true; |
| doAA = true; |
| } |
| |
| // FIXME: lcd smoothed un-hinted rasterization unsupported. |
| if (!generateA8FromLCD && SkMask::kA8_Format == glyph.fMaskFormat) { |
| doLCD = false; |
| doAA = true; |
| } |
| |
| // If this font might have color glyphs, disable LCD as there's no way to support it. |
| // CoreText doesn't tell us which format it ended up using, so we can't detect it. |
| // A8 will end up black on transparent, but TODO: we can detect gray and set to A8. |
| if (SkMask::kARGB32_Format == glyph.fMaskFormat) { |
| doLCD = false; |
| } |
| |
| size_t rowBytes = fSize.fWidth * sizeof(CGRGBPixel); |
| if (!fCG || fSize.fWidth < glyph.fWidth || fSize.fHeight < glyph.fHeight) { |
| if (fSize.fWidth < glyph.fWidth) { |
| fSize.fWidth = RoundSize(glyph.fWidth); |
| } |
| if (fSize.fHeight < glyph.fHeight) { |
| fSize.fHeight = RoundSize(glyph.fHeight); |
| } |
| |
| rowBytes = fSize.fWidth * sizeof(CGRGBPixel); |
| void* image = fImageStorage.reset(rowBytes * fSize.fHeight); |
| const CGImageAlphaInfo alpha = (SkMask::kARGB32_Format == glyph.fMaskFormat) |
| ? kCGImageAlphaPremultipliedFirst |
| : kCGImageAlphaNoneSkipFirst; |
| const CGBitmapInfo bitmapInfo = kCGBitmapByteOrder32Host | alpha; |
| fCG.reset(CGBitmapContextCreate(image, fSize.fWidth, fSize.fHeight, 8, |
| rowBytes, fRGBSpace, bitmapInfo)); |
| |
| // Skia handles quantization and subpixel positioning, |
| // so disable quantization and enabe subpixel positioning in CG. |
| CGContextSetAllowsFontSubpixelQuantization(fCG, false); |
| CGContextSetShouldSubpixelQuantizeFonts(fCG, false); |
| |
| // Because CG always draws from the horizontal baseline, |
| // if there is a non-integral translation from the horizontal origin to the vertical origin, |
| // then CG cannot draw the glyph in the correct location without subpixel positioning. |
| CGContextSetAllowsFontSubpixelPositioning(fCG, true); |
| CGContextSetShouldSubpixelPositionFonts(fCG, true); |
| |
| CGContextSetTextDrawingMode(fCG, kCGTextFill); |
| |
| #if SK_IGNORE_MAC_FONT_WEIGHT_FIX |
| // Draw white on black to create mask. |
| // TODO: Draw black on white and invert, CG has a special case codepath. |
| CGContextSetGrayFillColor(fCG, 1.0f, 1.0f); |
| #else |
| // Draw black on white to create mask. (Special path exists to speed this up in CG.) |
| CGContextSetGrayFillColor(fCG, 0.0f, 1.0f); |
| #endif |
| |
| // force our checks below to happen |
| fDoAA = !doAA; |
| fDoLCD = !doLCD; |
| |
| if (legacy_CTFontDrawGlyphs == ctFontDrawGlyphs) { |
| // CTFontDrawGlyphs will apply the font, font size, and font matrix to the CGContext. |
| // Our 'fake' one does not, so set up the CGContext here. |
| CGContextSetFont(fCG, context.fCGFont); |
| CGContextSetFontSize(fCG, CTFontGetSize(context.fCTFont)); |
| } |
| CGContextSetTextMatrix(fCG, context.fTransform); |
| } |
| |
| if (fDoAA != doAA) { |
| CGContextSetShouldAntialias(fCG, doAA); |
| fDoAA = doAA; |
| } |
| if (fDoLCD != doLCD) { |
| CGContextSetShouldSmoothFonts(fCG, doLCD); |
| fDoLCD = doLCD; |
| } |
| |
| CGRGBPixel* image = (CGRGBPixel*)fImageStorage.get(); |
| // skip rows based on the glyph's height |
| image += (fSize.fHeight - glyph.fHeight) * fSize.fWidth; |
| |
| #if SK_IGNORE_MAC_FONT_WEIGHT_FIX |
| // erase to black |
| sk_memset_rect32(image, 0, glyph.fWidth, glyph.fHeight, rowBytes); |
| #else |
| // Erase to white (or transparent black if it's a color glyph, to not composite against white). |
| uint32_t bgColor = (SkMask::kARGB32_Format != glyph.fMaskFormat) ? 0xFFFFFFFF : 0x00000000; |
| sk_memset_rect32(image, bgColor, glyph.fWidth, glyph.fHeight, rowBytes); |
| #endif |
| |
| float subX = 0; |
| float subY = 0; |
| if (context.fDoSubPosition) { |
| subX = SkFixedToFloat(glyph.getSubXFixed()); |
| subY = SkFixedToFloat(glyph.getSubYFixed()); |
| } |
| |
| // CoreText and CoreGraphics always draw using the horizontal baseline origin. |
| if (context.fVertical) { |
| SkPoint offset; |
| context.getVerticalOffset(glyphID, &offset); |
| subX += offset.fX; |
| subY += offset.fY; |
| } |
| |
| CGPoint point = CGPointMake(-glyph.fLeft + subX, glyph.fTop + glyph.fHeight - subY); |
| // Prior to 10.10, CTFontDrawGlyphs acted like CGContextShowGlyphsAtPositions and took |
| // 'positions' which are in text space. The glyph location (in device space) must be |
| // mapped into text space, so that CG can convert it back into device space. |
| // In 10.10.1, this is handled directly in CTFontDrawGlyphs. |
| // |
| // However, in 10.10.2 color glyphs no longer rotate based on the font transform. |
| // So always make the font transform identity and place the transform on the context. |
| point = CGPointApplyAffineTransform(point, context.fInvTransform); |
| |
| ctFontDrawGlyphs(context.fCTFont, &glyphID, &point, 1, fCG); |
| |
| SkASSERT(rowBytesPtr); |
| *rowBytesPtr = rowBytes; |
| return image; |
| } |
| |
| void SkScalerContext_Mac::getVerticalOffset(CGGlyph glyphID, SkPoint* offset) const { |
| // Snow Leopard returns cgVertOffset in completely un-transformed FUnits (em space, y up). |
| // Lion and Leopard return cgVertOffset in CG units (pixels, y up). |
| CGSize cgVertOffset; |
| CTFontGetVerticalTranslationsForGlyphs(fCTFont, &glyphID, &cgVertOffset, 1); |
| if (isSnowLeopard()) { |
| SkPoint skVertOffset = { CGToScalar(cgVertOffset.width), CGToScalar(cgVertOffset.height) }; |
| // From FUnits (em space, y up) to SkGlyph units (pixels, y down). |
| fFUnitMatrix.mapPoints(&skVertOffset, 1); |
| *offset = skVertOffset; |
| return; |
| } |
| cgVertOffset = CGSizeApplyAffineTransform(cgVertOffset, fTransform); |
| SkPoint skVertOffset = { CGToScalar(cgVertOffset.width), CGToScalar(cgVertOffset.height) }; |
| // From CG units (pixels, y up) to SkGlyph units (pixels, y down). |
| skVertOffset.fY = -skVertOffset.fY; |
| *offset = skVertOffset; |
| } |
| |
| uint16_t SkScalerContext_Mac::getFBoundingBoxesGlyphOffset() { |
| if (fFBoundingBoxesGlyphOffset) { |
| return fFBoundingBoxesGlyphOffset; |
| } |
| fFBoundingBoxesGlyphOffset = fGlyphCount; // fallback for all fonts |
| AutoCGTable<SkOTTableHorizontalHeader> hheaTable(fCGFont); |
| if (hheaTable.fData) { |
| fFBoundingBoxesGlyphOffset = SkEndian_SwapBE16(hheaTable->numberOfHMetrics); |
| } |
| return fFBoundingBoxesGlyphOffset; |
| } |
| |
| bool SkScalerContext_Mac::generateBBoxes() { |
| if (fGeneratedFBoundingBoxes) { |
| return SkToBool(fFBoundingBoxes.get()); |
| } |
| fGeneratedFBoundingBoxes = true; |
| |
| AutoCGTable<SkOTTableHead> headTable(fCGFont); |
| if (!headTable.fData) { |
| return false; |
| } |
| |
| AutoCGTable<SkOTTableIndexToLocation> locaTable(fCGFont); |
| if (!locaTable.fData) { |
| return false; |
| } |
| |
| AutoCGTable<SkOTTableGlyph> glyfTable(fCGFont); |
| if (!glyfTable.fData) { |
| return false; |
| } |
| |
| uint16_t entries = fGlyphCount - fFBoundingBoxesGlyphOffset; |
| fFBoundingBoxes.reset(entries); |
| |
| SkOTTableHead::IndexToLocFormat locaFormat = headTable->indexToLocFormat; |
| SkOTTableGlyph::Iterator glyphDataIter(*glyfTable.fData, *locaTable.fData, locaFormat); |
| glyphDataIter.advance(fFBoundingBoxesGlyphOffset); |
| for (uint16_t boundingBoxesIndex = 0; boundingBoxesIndex < entries; ++boundingBoxesIndex) { |
| const SkOTTableGlyphData* glyphData = glyphDataIter.next(); |
| GlyphRect& rect = fFBoundingBoxes[boundingBoxesIndex]; |
| rect.fMinX = SkEndian_SwapBE16(glyphData->xMin); |
| rect.fMinY = SkEndian_SwapBE16(glyphData->yMin); |
| rect.fMaxX = SkEndian_SwapBE16(glyphData->xMax); |
| rect.fMaxY = SkEndian_SwapBE16(glyphData->yMax); |
| } |
| |
| return true; |
| } |
| |
| unsigned SkScalerContext_Mac::generateGlyphCount(void) { |
| return fGlyphCount; |
| } |
| |
| uint16_t SkScalerContext_Mac::generateCharToGlyph(SkUnichar uni) { |
| AUTO_CG_LOCK(); |
| |
| CGGlyph cgGlyph[2]; |
| UniChar theChar[2]; // UniChar is a UTF-16 16-bit code unit. |
| |
| // Get the glyph |
| size_t numUniChar = SkUTF16_FromUnichar(uni, theChar); |
| SkASSERT(sizeof(CGGlyph) <= sizeof(uint16_t)); |
| |
| // Undocumented behavior of CTFontGetGlyphsForCharacters with non-bmp code points: |
| // When a surrogate pair is detected, the glyph index used is the index of the high surrogate. |
| // It is documented that if a mapping is unavailable, the glyph will be set to 0. |
| CTFontGetGlyphsForCharacters(fCTFont, theChar, cgGlyph, numUniChar); |
| return cgGlyph[0]; |
| } |
| |
| void SkScalerContext_Mac::generateAdvance(SkGlyph* glyph) { |
| this->generateMetrics(glyph); |
| } |
| |
| void SkScalerContext_Mac::generateMetrics(SkGlyph* glyph) { |
| AUTO_CG_LOCK(); |
| |
| const CGGlyph cgGlyph = (CGGlyph) glyph->getGlyphID(); |
| glyph->zeroMetrics(); |
| |
| // The following block produces cgAdvance in CG units (pixels, y up). |
| CGSize cgAdvance; |
| if (fVertical) { |
| CTFontGetAdvancesForGlyphs(fCTFont, kCTFontVerticalOrientation, |
| &cgGlyph, &cgAdvance, 1); |
| // Vertical advances are returned as widths instead of heights. |
| SkTSwap(cgAdvance.height, cgAdvance.width); |
| cgAdvance.height = -cgAdvance.height; |
| } else { |
| CTFontGetAdvancesForGlyphs(fCTFont, kCTFontHorizontalOrientation, |
| &cgGlyph, &cgAdvance, 1); |
| } |
| cgAdvance = CGSizeApplyAffineTransform(cgAdvance, fTransform); |
| glyph->fAdvanceX = SkFloatToFixed_Check(cgAdvance.width); |
| glyph->fAdvanceY = -SkFloatToFixed_Check(cgAdvance.height); |
| |
| // The following produces skBounds in SkGlyph units (pixels, y down), |
| // or returns early if skBounds would be empty. |
| SkRect skBounds; |
| |
| // On Mountain Lion, CTFontGetBoundingRectsForGlyphs with kCTFontVerticalOrientation and |
| // CTFontGetVerticalTranslationsForGlyphs do not agree when using OTF CFF fonts. |
| // For TTF fonts these two do agree and we can use CTFontGetBoundingRectsForGlyphs to get |
| // the bounding box and CTFontGetVerticalTranslationsForGlyphs to then draw the glyph |
| // inside that bounding box. However, with OTF CFF fonts this does not work. It appears that |
| // CTFontGetBoundingRectsForGlyphs with kCTFontVerticalOrientation on OTF CFF fonts tries |
| // to center the glyph along the vertical baseline and also perform some mysterious shift |
| // along the baseline. CTFontGetVerticalTranslationsForGlyphs does not appear to perform |
| // these steps. |
| // |
| // It is not known which is correct (or if either is correct). However, we must always draw |
| // from the horizontal origin and must use CTFontGetVerticalTranslationsForGlyphs to draw. |
| // As a result, we do not call CTFontGetBoundingRectsForGlyphs for vertical glyphs. |
| |
| // On Snow Leopard, CTFontGetBoundingRectsForGlyphs ignores kCTFontVerticalOrientation and |
| // returns horizontal bounds. |
| |
| // On Lion and Mountain Lion, CTFontGetBoundingRectsForGlyphs has a bug which causes it to |
| // return a bad value in cgBounds.origin.x for SFNT fonts whose hhea::numberOfHMetrics is |
| // less than its maxp::numGlyphs. When this is the case we try to read the bounds from the |
| // font directly. |
| if ((isLion() || isMountainLion()) && |
| (cgGlyph < fGlyphCount && cgGlyph >= getFBoundingBoxesGlyphOffset() && generateBBoxes())) |
| { |
| const GlyphRect& gRect = fFBoundingBoxes[cgGlyph - fFBoundingBoxesGlyphOffset]; |
| if (gRect.fMinX >= gRect.fMaxX || gRect.fMinY >= gRect.fMaxY) { |
| return; |
| } |
| skBounds = SkRect::MakeLTRB(gRect.fMinX, gRect.fMinY, gRect.fMaxX, gRect.fMaxY); |
| // From FUnits (em space, y up) to SkGlyph units (pixels, y down). |
| fFUnitMatrix.mapRect(&skBounds); |
| |
| } else { |
| // CTFontGetBoundingRectsForGlyphs produces cgBounds in CG units (pixels, y up). |
| CGRect cgBounds; |
| CTFontGetBoundingRectsForGlyphs(fCTFont, kCTFontHorizontalOrientation, |
| &cgGlyph, &cgBounds, 1); |
| cgBounds = CGRectApplyAffineTransform(cgBounds, fTransform); |
| |
| // BUG? |
| // 0x200B (zero-advance space) seems to return a huge (garbage) bounds, when |
| // it should be empty. So, if we see a zero-advance, we check if it has an |
| // empty path or not, and if so, we jam the bounds to 0. Hopefully a zero-advance |
| // is rare, so we won't incur a big performance cost for this extra check. |
| if (0 == cgAdvance.width && 0 == cgAdvance.height) { |
| AutoCFRelease<CGPathRef> path(CTFontCreatePathForGlyph(fCTFont, cgGlyph, nullptr)); |
| if (nullptr == path || CGPathIsEmpty(path)) { |
| return; |
| } |
| } |
| |
| if (CGRectIsEmpty_inline(cgBounds)) { |
| return; |
| } |
| |
| // Convert cgBounds to SkGlyph units (pixels, y down). |
| skBounds = SkRect::MakeXYWH(cgBounds.origin.x, -cgBounds.origin.y - cgBounds.size.height, |
| cgBounds.size.width, cgBounds.size.height); |
| } |
| |
| if (fVertical) { |
| // Due to all of the vertical bounds bugs, skBounds is always the horizontal bounds. |
| // Convert these horizontal bounds into vertical bounds. |
| SkPoint offset; |
| getVerticalOffset(cgGlyph, &offset); |
| skBounds.offset(offset); |
| } |
| |
| // Currently the bounds are based on being rendered at (0,0). |
| // The top left must not move, since that is the base from which subpixel positioning is offset. |
| if (fDoSubPosition) { |
| skBounds.fRight += SkFixedToFloat(glyph->getSubXFixed()); |
| skBounds.fBottom += SkFixedToFloat(glyph->getSubYFixed()); |
| } |
| |
| SkIRect skIBounds; |
| skBounds.roundOut(&skIBounds); |
| // Expand the bounds by 1 pixel, to give CG room for anti-aliasing. |
| // Note that this outset is to allow room for LCD smoothed glyphs. However, the correct outset |
| // is not currently known, as CG dilates the outlines by some percentage. |
| // Note that if this context is A8 and not back-forming from LCD, there is no need to outset. |
| skIBounds.outset(1, 1); |
| glyph->fLeft = SkToS16(skIBounds.fLeft); |
| glyph->fTop = SkToS16(skIBounds.fTop); |
| glyph->fWidth = SkToU16(skIBounds.width()); |
| glyph->fHeight = SkToU16(skIBounds.height()); |
| } |
| |
| #include "SkColorPriv.h" |
| |
| static void build_power_table(uint8_t table[]) { |
| for (int i = 0; i < 256; i++) { |
| float x = i / 255.f; |
| int xx = SkScalarRoundToInt(x * x * 255); |
| table[i] = SkToU8(xx); |
| } |
| } |
| |
| /** |
| * This will invert the gamma applied by CoreGraphics, so we can get linear |
| * values. |
| * |
| * CoreGraphics obscurely defaults to 2.0 as the smoothing gamma value. |
| * The color space used does not appear to affect this choice. |
| */ |
| static const uint8_t* getInverseGammaTableCoreGraphicSmoothing() { |
| static bool gInited; |
| static uint8_t gTableCoreGraphicsSmoothing[256]; |
| if (!gInited) { |
| build_power_table(gTableCoreGraphicsSmoothing); |
| gInited = true; |
| } |
| return gTableCoreGraphicsSmoothing; |
| } |
| |
| static void cgpixels_to_bits(uint8_t dst[], const CGRGBPixel src[], int count) { |
| while (count > 0) { |
| uint8_t mask = 0; |
| for (int i = 7; i >= 0; --i) { |
| #if SK_IGNORE_MAC_FONT_WEIGHT_FIX |
| mask |= (CGRGBPixel_getAlpha(*src++) >> 7) << i; |
| #else |
| mask |= ((CGRGBPixel_getAlpha(*src++) >> 7) ^ 0x1) << i; |
| #endif |
| if (0 == --count) { |
| break; |
| } |
| } |
| *dst++ = mask; |
| } |
| } |
| |
| template<bool APPLY_PREBLEND> |
| static inline uint8_t rgb_to_a8(CGRGBPixel rgb, const uint8_t* table8) { |
| #if SK_IGNORE_MAC_FONT_WEIGHT_FIX |
| U8CPU r = (rgb >> 16) & 0xFF; |
| U8CPU g = (rgb >> 8) & 0xFF; |
| U8CPU b = (rgb >> 0) & 0xFF; |
| #else |
| U8CPU r = 0xFF - ((rgb >> 16) & 0xFF); |
| U8CPU g = 0xFF - ((rgb >> 8) & 0xFF); |
| U8CPU b = 0xFF - ((rgb >> 0) & 0xFF); |
| #endif |
| U8CPU lum = sk_apply_lut_if<APPLY_PREBLEND>(SkComputeLuminance(r, g, b), table8); |
| #if SK_SHOW_TEXT_BLIT_COVERAGE |
| lum = SkTMax(lum, (U8CPU)0x30); |
| #endif |
| return lum; |
| } |
| template<bool APPLY_PREBLEND> |
| static void rgb_to_a8(const CGRGBPixel* SK_RESTRICT cgPixels, size_t cgRowBytes, |
| const SkGlyph& glyph, const uint8_t* table8) { |
| const int width = glyph.fWidth; |
| size_t dstRB = glyph.rowBytes(); |
| uint8_t* SK_RESTRICT dst = (uint8_t*)glyph.fImage; |
| |
| for (int y = 0; y < glyph.fHeight; y++) { |
| for (int i = 0; i < width; ++i) { |
| dst[i] = rgb_to_a8<APPLY_PREBLEND>(cgPixels[i], table8); |
| } |
| cgPixels = (CGRGBPixel*)((char*)cgPixels + cgRowBytes); |
| dst += dstRB; |
| } |
| } |
| |
| template<bool APPLY_PREBLEND> |
| static inline uint16_t rgb_to_lcd16(CGRGBPixel rgb, const uint8_t* tableR, |
| const uint8_t* tableG, |
| const uint8_t* tableB) { |
| #if SK_IGNORE_MAC_FONT_WEIGHT_FIX |
| U8CPU r = sk_apply_lut_if<APPLY_PREBLEND>((rgb >> 16) & 0xFF, tableR); |
| U8CPU g = sk_apply_lut_if<APPLY_PREBLEND>((rgb >> 8) & 0xFF, tableG); |
| U8CPU b = sk_apply_lut_if<APPLY_PREBLEND>((rgb >> 0) & 0xFF, tableB); |
| #else |
| U8CPU r = sk_apply_lut_if<APPLY_PREBLEND>(0xFF - ((rgb >> 16) & 0xFF), tableR); |
| U8CPU g = sk_apply_lut_if<APPLY_PREBLEND>(0xFF - ((rgb >> 8) & 0xFF), tableG); |
| U8CPU b = sk_apply_lut_if<APPLY_PREBLEND>(0xFF - ((rgb >> 0) & 0xFF), tableB); |
| #endif |
| #if SK_SHOW_TEXT_BLIT_COVERAGE |
| r = SkTMax(r, (U8CPU)0x30); |
| g = SkTMax(g, (U8CPU)0x30); |
| b = SkTMax(b, (U8CPU)0x30); |
| #endif |
| return SkPack888ToRGB16(r, g, b); |
| } |
| template<bool APPLY_PREBLEND> |
| static void rgb_to_lcd16(const CGRGBPixel* SK_RESTRICT cgPixels, size_t cgRowBytes, const SkGlyph& glyph, |
| const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB) { |
| const int width = glyph.fWidth; |
| size_t dstRB = glyph.rowBytes(); |
| uint16_t* SK_RESTRICT dst = (uint16_t*)glyph.fImage; |
| |
| for (int y = 0; y < glyph.fHeight; y++) { |
| for (int i = 0; i < width; i++) { |
| dst[i] = rgb_to_lcd16<APPLY_PREBLEND>(cgPixels[i], tableR, tableG, tableB); |
| } |
| cgPixels = (CGRGBPixel*)((char*)cgPixels + cgRowBytes); |
| dst = (uint16_t*)((char*)dst + dstRB); |
| } |
| } |
| |
| static SkPMColor cgpixels_to_pmcolor(CGRGBPixel rgb) { |
| U8CPU a = (rgb >> 24) & 0xFF; |
| U8CPU r = (rgb >> 16) & 0xFF; |
| U8CPU g = (rgb >> 8) & 0xFF; |
| U8CPU b = (rgb >> 0) & 0xFF; |
| #if SK_SHOW_TEXT_BLIT_COVERAGE |
| a = SkTMax(a, (U8CPU)0x30); |
| #endif |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| void SkScalerContext_Mac::generateImage(const SkGlyph& glyph) { |
| CGGlyph cgGlyph = (CGGlyph) glyph.getGlyphID(); |
| |
| // FIXME: lcd smoothed un-hinted rasterization unsupported. |
| bool generateA8FromLCD = fRec.getHinting() != SkPaint::kNo_Hinting; |
| |
| // Draw the glyph |
| size_t cgRowBytes; |
| CGRGBPixel* cgPixels = fOffscreen.getCG(*this, glyph, cgGlyph, &cgRowBytes, generateA8FromLCD); |
| if (cgPixels == nullptr) { |
| return; |
| } |
| |
| // Fix the glyph |
| const bool isLCD = isLCDFormat(glyph.fMaskFormat); |
| if (isLCD || (glyph.fMaskFormat == SkMask::kA8_Format && supports_LCD() && generateA8FromLCD)) { |
| const uint8_t* table = getInverseGammaTableCoreGraphicSmoothing(); |
| |
| //Note that the following cannot really be integrated into the |
| //pre-blend, since we may not be applying the pre-blend; when we aren't |
| //applying the pre-blend it means that a filter wants linear anyway. |
| //Other code may also be applying the pre-blend, so we'd need another |
| //one with this and one without. |
| CGRGBPixel* addr = cgPixels; |
| for (int y = 0; y < glyph.fHeight; ++y) { |
| for (int x = 0; x < glyph.fWidth; ++x) { |
| int r = (addr[x] >> 16) & 0xFF; |
| int g = (addr[x] >> 8) & 0xFF; |
| int b = (addr[x] >> 0) & 0xFF; |
| addr[x] = (table[r] << 16) | (table[g] << 8) | table[b]; |
| } |
| addr = SkTAddOffset<CGRGBPixel>(addr, cgRowBytes); |
| } |
| } |
| |
| // Convert glyph to mask |
| switch (glyph.fMaskFormat) { |
| case SkMask::kLCD16_Format: { |
| if (fPreBlend.isApplicable()) { |
| rgb_to_lcd16<true>(cgPixels, cgRowBytes, glyph, |
| fPreBlend.fR, fPreBlend.fG, fPreBlend.fB); |
| } else { |
| rgb_to_lcd16<false>(cgPixels, cgRowBytes, glyph, |
| fPreBlend.fR, fPreBlend.fG, fPreBlend.fB); |
| } |
| } break; |
| case SkMask::kA8_Format: { |
| if (fPreBlend.isApplicable()) { |
| rgb_to_a8<true>(cgPixels, cgRowBytes, glyph, fPreBlend.fG); |
| } else { |
| rgb_to_a8<false>(cgPixels, cgRowBytes, glyph, fPreBlend.fG); |
| } |
| } break; |
| case SkMask::kBW_Format: { |
| const int width = glyph.fWidth; |
| size_t dstRB = glyph.rowBytes(); |
| uint8_t* dst = (uint8_t*)glyph.fImage; |
| for (int y = 0; y < glyph.fHeight; y++) { |
| cgpixels_to_bits(dst, cgPixels, width); |
| cgPixels = (CGRGBPixel*)((char*)cgPixels + cgRowBytes); |
| dst += dstRB; |
| } |
| } break; |
| case SkMask::kARGB32_Format: { |
| const int width = glyph.fWidth; |
| size_t dstRB = glyph.rowBytes(); |
| SkPMColor* dst = (SkPMColor*)glyph.fImage; |
| for (int y = 0; y < glyph.fHeight; y++) { |
| for (int x = 0; x < width; ++x) { |
| dst[x] = cgpixels_to_pmcolor(cgPixels[x]); |
| } |
| cgPixels = (CGRGBPixel*)((char*)cgPixels + cgRowBytes); |
| dst = (SkPMColor*)((char*)dst + dstRB); |
| } |
| } break; |
| default: |
| SkDEBUGFAIL("unexpected mask format"); |
| break; |
| } |
| } |
| |
| /* |
| * Our subpixel resolution is only 2 bits in each direction, so a scale of 4 |
| * seems sufficient, and possibly even correct, to allow the hinted outline |
| * to be subpixel positioned. |
| */ |
| #define kScaleForSubPixelPositionHinting (4.0f) |
| |
| void SkScalerContext_Mac::generatePath(const SkGlyph& glyph, SkPath* path) { |
| AUTO_CG_LOCK(); |
| |
| SkScalar scaleX = SK_Scalar1; |
| SkScalar scaleY = SK_Scalar1; |
| |
| CGAffineTransform xform = fTransform; |
| /* |
| * For subpixel positioning, we want to return an unhinted outline, so it |
| * can be positioned nicely at fractional offsets. However, we special-case |
| * if the baseline of the (horizontal) text is axis-aligned. In those cases |
| * we want to retain hinting in the direction orthogonal to the baseline. |
| * e.g. for horizontal baseline, we want to retain hinting in Y. |
| * The way we remove hinting is to scale the font by some value (4) in that |
| * direction, ask for the path, and then scale the path back down. |
| */ |
| if (fDoSubPosition) { |
| // start out by assuming that we want no hining in X and Y |
| scaleX = scaleY = kScaleForSubPixelPositionHinting; |
| // now see if we need to restore hinting for axis-aligned baselines |
| switch (this->computeAxisAlignmentForHText()) { |
| case kX_SkAxisAlignment: |
| scaleY = SK_Scalar1; // want hinting in the Y direction |
| break; |
| case kY_SkAxisAlignment: |
| scaleX = SK_Scalar1; // want hinting in the X direction |
| break; |
| default: |
| break; |
| } |
| |
| CGAffineTransform scale(CGAffineTransformMakeScale(ScalarToCG(scaleX), ScalarToCG(scaleY))); |
| xform = CGAffineTransformConcat(fTransform, scale); |
| } |
| |
| CGGlyph cgGlyph = (CGGlyph)glyph.getGlyphID(); |
| AutoCFRelease<CGPathRef> cgPath(CTFontCreatePathForGlyph(fCTFont, cgGlyph, &xform)); |
| |
| path->reset(); |
| if (cgPath != nullptr) { |
| CGPathApply(cgPath, path, SkScalerContext_Mac::CTPathElement); |
| } |
| |
| if (fDoSubPosition) { |
| SkMatrix m; |
| m.setScale(SkScalarInvert(scaleX), SkScalarInvert(scaleY)); |
| path->transform(m); |
| } |
| if (fVertical) { |
| SkPoint offset; |
| getVerticalOffset(cgGlyph, &offset); |
| path->offset(offset.fX, offset.fY); |
| } |
| } |
| |
| void SkScalerContext_Mac::generateFontMetrics(SkPaint::FontMetrics* metrics) { |
| if (nullptr == metrics) { |
| return; |
| } |
| |
| AUTO_CG_LOCK(); |
| |
| CGRect theBounds = CTFontGetBoundingBox(fCTFont); |
| |
| metrics->fTop = CGToScalar(-CGRectGetMaxY_inline(theBounds)); |
| metrics->fAscent = CGToScalar(-CTFontGetAscent(fCTFont)); |
| metrics->fDescent = CGToScalar( CTFontGetDescent(fCTFont)); |
| metrics->fBottom = CGToScalar(-CGRectGetMinY_inline(theBounds)); |
| metrics->fLeading = CGToScalar( CTFontGetLeading(fCTFont)); |
| metrics->fAvgCharWidth = CGToScalar( CGRectGetWidth_inline(theBounds)); |
| metrics->fXMin = CGToScalar( CGRectGetMinX_inline(theBounds)); |
| metrics->fXMax = CGToScalar( CGRectGetMaxX_inline(theBounds)); |
| metrics->fMaxCharWidth = metrics->fXMax - metrics->fXMin; |
| metrics->fXHeight = CGToScalar( CTFontGetXHeight(fCTFont)); |
| metrics->fCapHeight = CGToScalar( CTFontGetCapHeight(fCTFont)); |
| metrics->fUnderlineThickness = CGToScalar( CTFontGetUnderlineThickness(fCTFont)); |
| metrics->fUnderlinePosition = -CGToScalar( CTFontGetUnderlinePosition(fCTFont)); |
| |
| metrics->fFlags |= SkPaint::FontMetrics::kUnderlineThinknessIsValid_Flag; |
| metrics->fFlags |= SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag; |
| } |
| |
| void SkScalerContext_Mac::CTPathElement(void *info, const CGPathElement *element) { |
| SkPath* skPath = (SkPath*)info; |
| |
| // Process the path element |
| switch (element->type) { |
| case kCGPathElementMoveToPoint: |
| skPath->moveTo(element->points[0].x, -element->points[0].y); |
| break; |
| |
| case kCGPathElementAddLineToPoint: |
| skPath->lineTo(element->points[0].x, -element->points[0].y); |
| break; |
| |
| case kCGPathElementAddQuadCurveToPoint: |
| skPath->quadTo(element->points[0].x, -element->points[0].y, |
| element->points[1].x, -element->points[1].y); |
| break; |
| |
| case kCGPathElementAddCurveToPoint: |
| skPath->cubicTo(element->points[0].x, -element->points[0].y, |
| element->points[1].x, -element->points[1].y, |
| element->points[2].x, -element->points[2].y); |
| break; |
| |
| case kCGPathElementCloseSubpath: |
| skPath->close(); |
| break; |
| |
| default: |
| SkDEBUGFAIL("Unknown path element!"); |
| break; |
| } |
| } |
| |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // Returns nullptr on failure |
| // Call must still manage its ownership of provider |
| static SkTypeface* create_from_dataProvider(CGDataProviderRef provider) { |
| AutoCFRelease<CGFontRef> cg(CGFontCreateWithDataProvider(provider)); |
| if (nullptr == cg) { |
| return nullptr; |
| } |
| CTFontRef ct = CTFontCreateWithGraphicsFont(cg, 0, nullptr, nullptr); |
| return ct ? NewFromFontRef(ct, nullptr, nullptr, true) : nullptr; |
| } |
| |
| // Web fonts added to the the CTFont registry do not return their character set. |
| // Iterate through the font in this case. The existing caller caches the result, |
| // so the performance impact isn't too bad. |
| static void populate_glyph_to_unicode_slow(CTFontRef ctFont, CFIndex glyphCount, |
| SkTDArray<SkUnichar>* glyphToUnicode) { |
| glyphToUnicode->setCount(SkToInt(glyphCount)); |
| SkUnichar* out = glyphToUnicode->begin(); |
| sk_bzero(out, glyphCount * sizeof(SkUnichar)); |
| UniChar unichar = 0; |
| while (glyphCount > 0) { |
| CGGlyph glyph; |
| if (CTFontGetGlyphsForCharacters(ctFont, &unichar, &glyph, 1)) { |
| out[glyph] = unichar; |
| --glyphCount; |
| } |
| if (++unichar == 0) { |
| break; |
| } |
| } |
| } |
| |
| // Construct Glyph to Unicode table. |
| // Unicode code points that require conjugate pairs in utf16 are not |
| // supported. |
| static void populate_glyph_to_unicode(CTFontRef ctFont, CFIndex glyphCount, |
| SkTDArray<SkUnichar>* glyphToUnicode) { |
| AutoCFRelease<CFCharacterSetRef> charSet(CTFontCopyCharacterSet(ctFont)); |
| if (!charSet) { |
| populate_glyph_to_unicode_slow(ctFont, glyphCount, glyphToUnicode); |
| return; |
| } |
| |
| AutoCFRelease<CFDataRef> bitmap(CFCharacterSetCreateBitmapRepresentation(kCFAllocatorDefault, |
| charSet)); |
| if (!bitmap) { |
| return; |
| } |
| CFIndex length = CFDataGetLength(bitmap); |
| if (!length) { |
| return; |
| } |
| if (length > 8192) { |
| // TODO: Add support for Unicode above 0xFFFF |
| // Consider only the BMP portion of the Unicode character points. |
| // The bitmap may contain other planes, up to plane 16. |
| // See http://developer.apple.com/library/ios/#documentation/CoreFoundation/Reference/CFCharacterSetRef/Reference/reference.html |
| length = 8192; |
| } |
| const UInt8* bits = CFDataGetBytePtr(bitmap); |
| glyphToUnicode->setCount(SkToInt(glyphCount)); |
| SkUnichar* out = glyphToUnicode->begin(); |
| sk_bzero(out, glyphCount * sizeof(SkUnichar)); |
| for (int i = 0; i < length; i++) { |
| int mask = bits[i]; |
| if (!mask) { |
| continue; |
| } |
| for (int j = 0; j < 8; j++) { |
| CGGlyph glyph; |
| UniChar unichar = static_cast<UniChar>((i << 3) + j); |
| if (mask & (1 << j) && CTFontGetGlyphsForCharacters(ctFont, &unichar, &glyph, 1)) { |
| out[glyph] = unichar; |
| } |
| } |
| } |
| } |
| |
| static bool getWidthAdvance(CTFontRef ctFont, int gId, int16_t* data) { |
| CGSize advance; |
| advance.width = 0; |
| CGGlyph glyph = gId; |
| CTFontGetAdvancesForGlyphs(ctFont, kCTFontHorizontalOrientation, &glyph, &advance, 1); |
| *data = sk_float_round2int(advance.width); |
| return true; |
| } |
| |
| /** Assumes src and dst are not nullptr. */ |
| static void CFStringToSkString(CFStringRef src, SkString* dst) { |
| // Reserve enough room for the worst-case string, |
| // plus 1 byte for the trailing null. |
| CFIndex length = CFStringGetMaximumSizeForEncoding(CFStringGetLength(src), |
| kCFStringEncodingUTF8) + 1; |
| dst->resize(length); |
| CFStringGetCString(src, dst->writable_str(), length, kCFStringEncodingUTF8); |
| // Resize to the actual UTF-8 length used, stripping the null character. |
| dst->resize(strlen(dst->c_str())); |
| } |
| |
| SkAdvancedTypefaceMetrics* SkTypeface_Mac::onGetAdvancedTypefaceMetrics( |
| PerGlyphInfo perGlyphInfo, |
| const uint32_t* glyphIDs, |
| uint32_t glyphIDsCount) const { |
| |
| AUTO_CG_LOCK(); |
| |
| CTFontRef originalCTFont = fFontRef.get(); |
| AutoCFRelease<CTFontRef> ctFont(ctfont_create_exact_copy( |
| originalCTFont, CTFontGetUnitsPerEm(originalCTFont), nullptr)); |
| |
| SkAdvancedTypefaceMetrics* info = new SkAdvancedTypefaceMetrics; |
| |
| { |
| AutoCFRelease<CFStringRef> fontName(CTFontCopyPostScriptName(ctFont)); |
| if (fontName.get()) { |
| CFStringToSkString(fontName, &info->fFontName); |
| } |
| } |
| |
| CFIndex glyphCount = CTFontGetGlyphCount(ctFont); |
| info->fLastGlyphID = SkToU16(glyphCount - 1); |
| info->fEmSize = CTFontGetUnitsPerEm(ctFont); |
| |
| if (perGlyphInfo & kToUnicode_PerGlyphInfo) { |
| populate_glyph_to_unicode(ctFont, glyphCount, &info->fGlyphToUnicode); |
| } |
| |
| // If it's not a truetype font, mark it as 'other'. Assume that TrueType |
| // fonts always have both glyf and loca tables. At the least, this is what |
| // sfntly needs to subset the font. CTFontCopyAttribute() does not always |
| // succeed in determining this directly. |
| if (!this->getTableSize('glyf') || !this->getTableSize('loca')) { |
| return info; |
| } |
| |
| info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font; |
| CTFontSymbolicTraits symbolicTraits = CTFontGetSymbolicTraits(ctFont); |
| if (symbolicTraits & kCTFontMonoSpaceTrait) { |
| info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style; |
| } |
| if (symbolicTraits & kCTFontItalicTrait) { |
| info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style; |
| } |
| CTFontStylisticClass stylisticClass = symbolicTraits & kCTFontClassMaskTrait; |
| if (stylisticClass >= kCTFontOldStyleSerifsClass && stylisticClass <= kCTFontSlabSerifsClass) { |
| info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style; |
| } else if (stylisticClass & kCTFontScriptsClass) { |
| info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style; |
| } |
| info->fItalicAngle = (int16_t) CTFontGetSlantAngle(ctFont); |
| info->fAscent = (int16_t) CTFontGetAscent(ctFont); |
| info->fDescent = (int16_t) CTFontGetDescent(ctFont); |
| info->fCapHeight = (int16_t) CTFontGetCapHeight(ctFont); |
| CGRect bbox = CTFontGetBoundingBox(ctFont); |
| |
| SkRect r; |
| r.set( CGToScalar(CGRectGetMinX_inline(bbox)), // Left |
| CGToScalar(CGRectGetMaxY_inline(bbox)), // Top |
| CGToScalar(CGRectGetMaxX_inline(bbox)), // Right |
| CGToScalar(CGRectGetMinY_inline(bbox))); // Bottom |
| |
| r.roundOut(&(info->fBBox)); |
| |
| // Figure out a good guess for StemV - Min width of i, I, !, 1. |
| // This probably isn't very good with an italic font. |
| int16_t min_width = SHRT_MAX; |
| info->fStemV = 0; |
| static const UniChar stem_chars[] = {'i', 'I', '!', '1'}; |
| const size_t count = sizeof(stem_chars) / sizeof(stem_chars[0]); |
| CGGlyph glyphs[count]; |
| CGRect boundingRects[count]; |
| if (CTFontGetGlyphsForCharacters(ctFont, stem_chars, glyphs, count)) { |
| CTFontGetBoundingRectsForGlyphs(ctFont, kCTFontHorizontalOrientation, |
| glyphs, boundingRects, count); |
| for (size_t i = 0; i < count; i++) { |
| int16_t width = (int16_t) boundingRects[i].size.width; |
| if (width > 0 && width < min_width) { |
| min_width = width; |
| info->fStemV = min_width; |
| } |
| } |
| } |
| |
| if (perGlyphInfo & kHAdvance_PerGlyphInfo) { |
| if (info->fStyle & SkAdvancedTypefaceMetrics::kFixedPitch_Style) { |
| skia_advanced_typeface_metrics_utils::appendRange(&info->fGlyphWidths, 0); |
| info->fGlyphWidths->fAdvance.append(1, &min_width); |
| skia_advanced_typeface_metrics_utils::finishRange(info->fGlyphWidths.get(), 0, |
| SkAdvancedTypefaceMetrics::WidthRange::kDefault); |
| } else { |
| info->fGlyphWidths.reset( |
| skia_advanced_typeface_metrics_utils::getAdvanceData(ctFont.get(), |
| SkToInt(glyphCount), |
| glyphIDs, |
| glyphIDsCount, |
| &getWidthAdvance)); |
| } |
| } |
| return info; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static SK_SFNT_ULONG get_font_type_tag(const SkTypeface_Mac* typeface) { |
| CTFontRef ctFont = typeface->fFontRef.get(); |
| AutoCFRelease<CFNumberRef> fontFormatRef( |
| static_cast<CFNumberRef>(CTFontCopyAttribute(ctFont, kCTFontFormatAttribute))); |
| if (!fontFormatRef) { |
| return 0; |
| } |
| |
| SInt32 fontFormatValue; |
| if (!CFNumberGetValue(fontFormatRef, kCFNumberSInt32Type, &fontFormatValue)) { |
| return 0; |
| } |
| |
| switch (fontFormatValue) { |
| case kCTFontFormatOpenTypePostScript: |
| return SkSFNTHeader::fontType_OpenTypeCFF::TAG; |
| case kCTFontFormatOpenTypeTrueType: |
| return SkSFNTHeader::fontType_WindowsTrueType::TAG; |
| case kCTFontFormatTrueType: |
| return SkSFNTHeader::fontType_MacTrueType::TAG; |
| case kCTFontFormatPostScript: |
| return SkSFNTHeader::fontType_PostScript::TAG; |
| case kCTFontFormatBitmap: |
| return SkSFNTHeader::fontType_MacTrueType::TAG; |
| case kCTFontFormatUnrecognized: |
| default: |
| //CT seems to be unreliable in being able to obtain the type, |
| //even if all we want is the first four bytes of the font resource. |
| //Just the presence of the FontForge 'FFTM' table seems to throw it off. |
| return SkSFNTHeader::fontType_WindowsTrueType::TAG; |
| } |
| } |
| |
| SkStreamAsset* SkTypeface_Mac::onOpenStream(int* ttcIndex) const { |
| SK_SFNT_ULONG fontType = get_font_type_tag(this); |
| if (0 == fontType) { |
| return nullptr; |
| } |
| |
| // get table tags |
| int numTables = this->countTables(); |
| SkTDArray<SkFontTableTag> tableTags; |
| tableTags.setCount(numTables); |
| this->getTableTags(tableTags.begin()); |
| |
| // calc total size for font, save sizes |
| SkTDArray<size_t> tableSizes; |
| size_t totalSize = sizeof(SkSFNTHeader) + sizeof(SkSFNTHeader::TableDirectoryEntry) * numTables; |
| for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) { |
| size_t tableSize = this->getTableSize(tableTags[tableIndex]); |
| totalSize += (tableSize + 3) & ~3; |
| *tableSizes.append() = tableSize; |
| } |
| |
| // reserve memory for stream, and zero it (tables must be zero padded) |
| SkMemoryStream* stream = new SkMemoryStream(totalSize); |
| char* dataStart = (char*)stream->getMemoryBase(); |
| sk_bzero(dataStart, totalSize); |
| char* dataPtr = dataStart; |
| |
| // compute font header entries |
| uint16_t entrySelector = 0; |
| uint16_t searchRange = 1; |
| while (searchRange < numTables >> 1) { |
| entrySelector++; |
| searchRange <<= 1; |
| } |
| searchRange <<= 4; |
| uint16_t rangeShift = (numTables << 4) - searchRange; |
| |
| // write font header |
| SkSFNTHeader* header = (SkSFNTHeader*)dataPtr; |
| header->fontType = fontType; |
| header->numTables = SkEndian_SwapBE16(numTables); |
| header->searchRange = SkEndian_SwapBE16(searchRange); |
| header->entrySelector = SkEndian_SwapBE16(entrySelector); |
| header->rangeShift = SkEndian_SwapBE16(rangeShift); |
| dataPtr += sizeof(SkSFNTHeader); |
| |
| // write tables |
| SkSFNTHeader::TableDirectoryEntry* entry = (SkSFNTHeader::TableDirectoryEntry*)dataPtr; |
| dataPtr += sizeof(SkSFNTHeader::TableDirectoryEntry) * numTables; |
| for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) { |
| size_t tableSize = tableSizes[tableIndex]; |
| this->getTableData(tableTags[tableIndex], 0, tableSize, dataPtr); |
| entry->tag = SkEndian_SwapBE32(tableTags[tableIndex]); |
| entry->checksum = SkEndian_SwapBE32(SkOTUtils::CalcTableChecksum((SK_OT_ULONG*)dataPtr, |
| tableSize)); |
| entry->offset = SkEndian_SwapBE32(SkToU32(dataPtr - dataStart)); |
| entry->logicalLength = SkEndian_SwapBE32(SkToU32(tableSize)); |
| |
| dataPtr += (tableSize + 3) & ~3; |
| ++entry; |
| } |
| |
| *ttcIndex = 0; |
| return stream; |
| } |
| |
| struct NonDefaultAxesContext { |
| SkFixed* axisValue; |
| CFArrayRef cgAxes; |
| }; |
| static void set_non_default_axes(CFTypeRef key, CFTypeRef value, void* context) { |
| NonDefaultAxesContext* self = static_cast<NonDefaultAxesContext*>(context); |
| |
| if (CFGetTypeID(key) != CFStringGetTypeID() || CFGetTypeID(value) != CFNumberGetTypeID()) { |
| return; |
| } |
| |
| // The key is a CFString which is a string from the 'name' table. |
| // Search the cgAxes for an axis with this name, and use its index to store the value. |
| CFIndex keyIndex = -1; |
| CFStringRef keyString = static_cast<CFStringRef>(key); |
| for (CFIndex i = 0; i < CFArrayGetCount(self->cgAxes); ++i) { |
| CFTypeRef cgAxis = CFArrayGetValueAtIndex(self->cgAxes, i); |
| if (CFGetTypeID(cgAxis) != CFDictionaryGetTypeID()) { |
| continue; |
| } |
| |
| CFDictionaryRef cgAxisDict = static_cast<CFDictionaryRef>(cgAxis); |
| CFTypeRef cgAxisName = CFDictionaryGetValue(cgAxisDict, kCGFontVariationAxisName); |
| if (!cgAxisName || CFGetTypeID(cgAxisName) != CFStringGetTypeID()) { |
| continue; |
| } |
| CFStringRef cgAxisNameString = static_cast<CFStringRef>(cgAxisName); |
| if (CFStringCompare(keyString, cgAxisNameString, 0) == kCFCompareEqualTo) { |
| keyIndex = i; |
| break; |
| } |
| } |
| if (keyIndex == -1) { |
| return; |
| } |
| |
| CFNumberRef valueNumber = static_cast<CFNumberRef>(value); |
| double valueDouble; |
| if (!CFNumberGetValue(valueNumber, kCFNumberDoubleType, &valueDouble) || |
| valueDouble < SkFixedToDouble(SK_FixedMin) || SkFixedToDouble(SK_FixedMax) < valueDouble) |
| { |
| return; |
| } |
| self->axisValue[keyIndex] = SkDoubleToFixed(valueDouble); |
| } |
| static bool get_variations(CTFontRef fFontRef, CFIndex* cgAxisCount, |
| SkAutoSTMalloc<4, SkFixed>* axisValues) |
| { |
| // CTFontCopyVariationAxes and CTFontCopyVariation do not work when applied to fonts which |
| // started life with CGFontCreateWithDataProvider (they simply always return nullptr). |
| // As a result, we are limited to CGFontCopyVariationAxes and CGFontCopyVariations. |
| AutoCFRelease<CGFontRef> cgFont(CTFontCopyGraphicsFont(fFontRef, nullptr)); |
| |
| AutoCFRelease<CFDictionaryRef> cgVariations(CGFontCopyVariations(cgFont)); |
| // If a font has no variations CGFontCopyVariations returns nullptr (instead of an empty dict). |
| if (!cgVariations.get()) { |
| return false; |
| } |
| |
| AutoCFRelease<CFArrayRef> cgAxes(CGFontCopyVariationAxes(cgFont)); |
| *cgAxisCount = CFArrayGetCount(cgAxes); |
| axisValues->reset(*cgAxisCount); |
| |
| // Set all of the axes to their default values. |
| // Fail if any default value cannot be determined. |
| for (CFIndex i = 0; i < *cgAxisCount; ++i) { |
| CFTypeRef cgAxis = CFArrayGetValueAtIndex(cgAxes, i); |
| if (CFGetTypeID(cgAxis) != CFDictionaryGetTypeID()) { |
| return false; |
| } |
| |
| CFDictionaryRef cgAxisDict = static_cast<CFDictionaryRef>(cgAxis); |
| CFTypeRef axisDefaultValue = CFDictionaryGetValue(cgAxisDict, |
| kCGFontVariationAxisDefaultValue); |
| if (!axisDefaultValue || CFGetTypeID(axisDefaultValue) != CFNumberGetTypeID()) { |
| return false; |
| } |
| CFNumberRef axisDefaultValueNumber = static_cast<CFNumberRef>(axisDefaultValue); |
| double axisDefaultValueDouble; |
| if (!CFNumberGetValue(axisDefaultValueNumber, kCFNumberDoubleType, &axisDefaultValueDouble)) |
| { |
| return false; |
| } |
| if (axisDefaultValueDouble < SkFixedToDouble(SK_FixedMin) || |
| SkFixedToDouble(SK_FixedMax) < axisDefaultValueDouble) |
| { |
| return false; |
| } |
| (*axisValues)[(int)i] = SkDoubleToFixed(axisDefaultValueDouble); |
| } |
| |
| // Override the default values with the given font's stated axis values. |
| NonDefaultAxesContext c = { axisValues->get(), cgAxes.get() }; |
| CFDictionaryApplyFunction(cgVariations, set_non_default_axes, &c); |
| |
| return true; |
| } |
| SkFontData* SkTypeface_Mac::onCreateFontData() const { |
| int index; |
| SkAutoTDelete<SkStreamAsset> stream(this->onOpenStream(&index)); |
| |
| CFIndex cgAxisCount; |
| SkAutoSTMalloc<4, SkFixed> axisValues; |
| if (get_variations(fFontRef, &cgAxisCount, &axisValues)) { |
| return new SkFontData(stream.release(), index, axisValues.get(), cgAxisCount); |
| } |
| return new SkFontData(stream.release(), index, nullptr, 0); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| int SkTypeface_Mac::onGetUPEM() const { |
| AutoCFRelease<CGFontRef> cgFont(CTFontCopyGraphicsFont(fFontRef, nullptr)); |
| return CGFontGetUnitsPerEm(cgFont); |
| } |
| |
| SkTypeface::LocalizedStrings* SkTypeface_Mac::onCreateFamilyNameIterator() const { |
| SkTypeface::LocalizedStrings* nameIter = |
| SkOTUtils::LocalizedStrings_NameTable::CreateForFamilyNames(*this); |
| if (nullptr == nameIter) { |
| AutoCFRelease<CFStringRef> cfLanguage; |
| AutoCFRelease<CFStringRef> cfFamilyName( |
| CTFontCopyLocalizedName(fFontRef, kCTFontFamilyNameKey, &cfLanguage)); |
| |
| SkString skLanguage; |
| SkString skFamilyName; |
| if (cfLanguage.get()) { |
| CFStringToSkString(cfLanguage.get(), &skLanguage); |
| } else { |
| skLanguage = "und"; //undetermined |
| } |
| if (cfFamilyName.get()) { |
| CFStringToSkString(cfFamilyName.get(), &skFamilyName); |
| } |
| |
| nameIter = new SkOTUtils::LocalizedStrings_SingleName(skFamilyName, skLanguage); |
| } |
| return nameIter; |
| } |
| |
| // If, as is the case with web fonts, the CTFont data isn't available, |
| // the CGFont data may work. While the CGFont may always provide the |
| // right result, leave the CTFont code path to minimize disruption. |
| static CFDataRef copyTableFromFont(CTFontRef ctFont, SkFontTableTag tag) { |
| CFDataRef data = CTFontCopyTable(ctFont, (CTFontTableTag) tag, |
| kCTFontTableOptionNoOptions); |
| if (nullptr == data) { |
| AutoCFRelease<CGFontRef> cgFont(CTFontCopyGraphicsFont(ctFont, nullptr)); |
| data = CGFontCopyTableForTag(cgFont, tag); |
| } |
| return data; |
| } |
| |
| int SkTypeface_Mac::onGetTableTags(SkFontTableTag tags[]) const { |
| AutoCFRelease<CFArrayRef> cfArray(CTFontCopyAvailableTables(fFontRef, |
| kCTFontTableOptionNoOptions)); |
| if (nullptr == cfArray) { |
| return 0; |
| } |
| int count = SkToInt(CFArrayGetCount(cfArray)); |
| if (tags) { |
| for (int i = 0; i < count; ++i) { |
| uintptr_t fontTag = reinterpret_cast<uintptr_t>(CFArrayGetValueAtIndex(cfArray, i)); |
| tags[i] = static_cast<SkFontTableTag>(fontTag); |
| } |
| } |
| return count; |
| } |
| |
| size_t SkTypeface_Mac::onGetTableData(SkFontTableTag tag, size_t offset, |
| size_t length, void* dstData) const { |
| AutoCFRelease<CFDataRef> srcData(copyTableFromFont(fFontRef, tag)); |
| if (nullptr == srcData) { |
| return 0; |
| } |
| |
| size_t srcSize = CFDataGetLength(srcData); |
| if (offset >= srcSize) { |
| return 0; |
| } |
| if (length > srcSize - offset) { |
| length = srcSize - offset; |
| } |
| if (dstData) { |
| memcpy(dstData, CFDataGetBytePtr(srcData) + offset, length); |
| } |
| return length; |
| } |
| |
| SkScalerContext* SkTypeface_Mac::onCreateScalerContext(const SkDescriptor* desc) const { |
| return new SkScalerContext_Mac(const_cast<SkTypeface_Mac*>(this), desc); |
| } |
| |
| void SkTypeface_Mac::onFilterRec(SkScalerContextRec* rec) const { |
| if (rec->fFlags & SkScalerContext::kLCD_BGROrder_Flag || |
| rec->fFlags & SkScalerContext::kLCD_Vertical_Flag) |
| { |
| rec->fMaskFormat = SkMask::kA8_Format; |
| // Render the glyphs as close as possible to what was requested. |
| // The above turns off subpixel rendering, but the user requested it. |
| // Normal hinting will cause the A8 masks to be generated from CoreGraphics subpixel masks. |
| // See comments below for more details. |
| rec->setHinting(SkPaint::kNormal_Hinting); |
| } |
| |
| unsigned flagsWeDontSupport = SkScalerContext::kDevKernText_Flag | |
| SkScalerContext::kForceAutohinting_Flag | |
| SkScalerContext::kLCD_BGROrder_Flag | |
| SkScalerContext::kLCD_Vertical_Flag; |
| |
| rec->fFlags &= ~flagsWeDontSupport; |
| |
| bool lcdSupport = supports_LCD(); |
| |
| // Only two levels of hinting are supported. |
| // kNo_Hinting means avoid CoreGraphics outline dilation. |
| // kNormal_Hinting means CoreGraphics outline dilation is allowed. |
| // If there is no lcd support, hinting (dilation) cannot be supported. |
| SkPaint::Hinting hinting = rec->getHinting(); |
| if (SkPaint::kSlight_Hinting == hinting || !lcdSupport) { |
| hinting = SkPaint::kNo_Hinting; |
| } else if (SkPaint::kFull_Hinting == hinting) { |
| hinting = SkPaint::kNormal_Hinting; |
| } |
| rec->setHinting(hinting); |
| |
| // FIXME: lcd smoothed un-hinted rasterization unsupported. |
| // Tracked by http://code.google.com/p/skia/issues/detail?id=915 . |
| // There is no current means to honor a request for unhinted lcd, |
| // so arbitrarilly ignore the hinting request and honor lcd. |
| |
| // Hinting and smoothing should be orthogonal, but currently they are not. |
| // CoreGraphics has no API to influence hinting. However, its lcd smoothed |
| // output is drawn from auto-dilated outlines (the amount of which is |
| // determined by AppleFontSmoothing). Its regular anti-aliased output is |
| // drawn from un-dilated outlines. |
| |
| // The behavior of Skia is as follows: |
| // [AA][no-hint]: generate AA using CoreGraphic's AA output. |
| // [AA][yes-hint]: use CoreGraphic's LCD output and reduce it to a single |
| // channel. This matches [LCD][yes-hint] in weight. |
| // [LCD][no-hint]: curently unable to honor, and must pick which to respect. |
| // Currenly side with LCD, effectively ignoring the hinting setting. |
| // [LCD][yes-hint]: generate LCD using CoreGraphic's LCD output. |
| |
| if (isLCDFormat(rec->fMaskFormat)) { |
| if (lcdSupport) { |
| //CoreGraphics creates 555 masks for smoothed text anyway. |
| rec->fMaskFormat = SkMask::kLCD16_Format; |
| rec->setHinting(SkPaint::kNormal_Hinting); |
| } else { |
| rec->fMaskFormat = SkMask::kA8_Format; |
| } |
| } |
| |
| // CoreText provides no information as to whether a glyph will be color or not. |
| // Fonts may mix outlines and bitmaps, so information is needed on a glyph by glyph basis. |
| // If a font contains an 'sbix' table, consider it to be a color font, and disable lcd. |
| if (fHasColorGlyphs) { |
| rec->fMaskFormat = SkMask::kARGB32_Format; |
| } |
| |
| // Unhinted A8 masks (those not derived from LCD masks) must respect SK_GAMMA_APPLY_TO_A8. |
| // All other masks can use regular gamma. |
| if (SkMask::kA8_Format == rec->fMaskFormat && SkPaint::kNo_Hinting == hinting) { |
| #ifndef SK_GAMMA_APPLY_TO_A8 |
| rec->ignorePreBlend(); |
| #endif |
| } else { |
| //CoreGraphics dialates smoothed text as needed. |
| rec->setContrast(0); |
| } |
| } |
| |
| // we take ownership of the ref |
| static const char* get_str(CFStringRef ref, SkString* str) { |
| if (nullptr == ref) { |
| return nullptr; |
| } |
| CFStringToSkString(ref, str); |
| CFSafeRelease(ref); |
| return str->c_str(); |
| } |
| |
| void SkTypeface_Mac::onGetFamilyName(SkString* familyName) const { |
| get_str(CTFontCopyFamilyName(fFontRef), familyName); |
| } |
| |
| void SkTypeface_Mac::onGetFontDescriptor(SkFontDescriptor* desc, |
| bool* isLocalStream) const { |
| SkString tmpStr; |
| |
| desc->setFamilyName(get_str(CTFontCopyFamilyName(fFontRef), &tmpStr)); |
| desc->setFullName(get_str(CTFontCopyFullName(fFontRef), &tmpStr)); |
| desc->setPostscriptName(get_str(CTFontCopyPostScriptName(fFontRef), &tmpStr)); |
| *isLocalStream = fIsLocalStream; |
| } |
| |
| int SkTypeface_Mac::onCharsToGlyphs(const void* chars, Encoding encoding, |
| uint16_t glyphs[], int glyphCount) const |
| { |
| // Undocumented behavior of CTFontGetGlyphsForCharacters with non-bmp code points: |
| // When a surrogate pair is detected, the glyph index used is the index of the high surrogate. |
| // It is documented that if a mapping is unavailable, the glyph will be set to 0. |
| |
| SkAutoSTMalloc<1024, UniChar> charStorage; |
| const UniChar* src; // UniChar is a UTF-16 16-bit code unit. |
| int srcCount; |
| switch (encoding) { |
| case kUTF8_Encoding: { |
| const char* utf8 = reinterpret_cast<const char*>(chars); |
| UniChar* utf16 = charStorage.reset(2 * glyphCount); |
| src = utf16; |
| for (int i = 0; i < glyphCount; ++i) { |
| SkUnichar uni = SkUTF8_NextUnichar(&utf8); |
| utf16 += SkUTF16_FromUnichar(uni, utf16); |
| } |
| srcCount = SkToInt(utf16 - src); |
| break; |
| } |
| case kUTF16_Encoding: { |
| src = reinterpret_cast<const UniChar*>(chars); |
| int extra = 0; |
| for (int i = 0; i < glyphCount; ++i) { |
| if (SkUTF16_IsHighSurrogate(src[i + extra])) { |
| ++extra; |
| } |
| } |
| srcCount = glyphCount + extra; |
| break; |
| } |
| case kUTF32_Encoding: { |
| const SkUnichar* utf32 = reinterpret_cast<const SkUnichar*>(chars); |
| UniChar* utf16 = charStorage.reset(2 * glyphCount); |
| src = utf16; |
| for (int i = 0; i < glyphCount; ++i) { |
| utf16 += SkUTF16_FromUnichar(utf32[i], utf16); |
| } |
| srcCount = SkToInt(utf16 - src); |
| break; |
| } |
| } |
| |
| // If glyphs is nullptr, CT still needs glyph storage for finding the first failure. |
| // Also, if there are any non-bmp code points, the provided 'glyphs' storage will be inadequate. |
| SkAutoSTMalloc<1024, uint16_t> glyphStorage; |
| uint16_t* macGlyphs = glyphs; |
| if (nullptr == macGlyphs || srcCount > glyphCount) { |
| macGlyphs = glyphStorage.reset(srcCount); |
| } |
| |
| bool allEncoded = CTFontGetGlyphsForCharacters(fFontRef, src, macGlyphs, srcCount); |
| |
| // If there were any non-bmp, then copy and compact. |
| // If 'glyphs' is nullptr, then compact glyphStorage in-place. |
| // If all are bmp and 'glyphs' is non-nullptr, 'glyphs' already contains the compact glyphs. |
| // If some are non-bmp and 'glyphs' is non-nullptr, copy and compact into 'glyphs'. |
| uint16_t* compactedGlyphs = glyphs; |
| if (nullptr == compactedGlyphs) { |
| compactedGlyphs = macGlyphs; |
| } |
| if (srcCount > glyphCount) { |
| int extra = 0; |
| for (int i = 0; i < glyphCount; ++i) { |
| compactedGlyphs[i] = macGlyphs[i + extra]; |
| if (SkUTF16_IsHighSurrogate(src[i + extra])) { |
| ++extra; |
| } |
| } |
| } |
| |
| if (allEncoded) { |
| return glyphCount; |
| } |
| |
| // If we got false, then we need to manually look for first failure. |
| for (int i = 0; i < glyphCount; ++i) { |
| if (0 == compactedGlyphs[i]) { |
| return i; |
| } |
| } |
| // Odd to get here, as we expected CT to have returned true up front. |
| return glyphCount; |
| } |
| |
| int SkTypeface_Mac::onCountGlyphs() const { |
| return SkToInt(CTFontGetGlyphCount(fFontRef)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static bool find_desc_str(CTFontDescriptorRef desc, CFStringRef name, SkString* value) { |
| AutoCFRelease<CFStringRef> ref((CFStringRef)CTFontDescriptorCopyAttribute(desc, name)); |
| if (nullptr == ref.get()) { |
| return false; |
| } |
| CFStringToSkString(ref, value); |
| return true; |
| } |
| |
| #include "SkFontMgr.h" |
| |
| static inline int sqr(int value) { |
| SkASSERT(SkAbs32(value) < 0x7FFF); // check for overflow |
| return value * value; |
| } |
| |
| // We normalize each axis (weight, width, italic) to be base-900 |
| static int compute_metric(const SkFontStyle& a, const SkFontStyle& b) { |
| return sqr(a.weight() - b.weight()) + |
| sqr((a.width() - b.width()) * 100) + |
| sqr((a.isItalic() != b.isItalic()) * 900); |
| } |
| |
| static SkTypeface* createFromDesc(CFStringRef cfFamilyName, CTFontDescriptorRef desc) { |
| NameStyle cacheRequest; |
| SkString skFamilyName; |
| CFStringToSkString(cfFamilyName, &skFamilyName); |
| cacheRequest.fName = skFamilyName.c_str(); |
| cacheRequest.fStyle = fontstyle_from_descriptor(desc); |
| |
| SkTypeface* face = SkTypefaceCache::FindByProcAndRef(find_by_NameStyle, &cacheRequest); |
| if (face) { |
| return face; |
| } |
| |
| AutoCFRelease<CTFontRef> ctFont(CTFontCreateWithFontDescriptor(desc, 0, nullptr)); |
| if (!ctFont) { |
| return nullptr; |
| } |
| |
| bool isFixedPitch; |
| (void)computeStyleBits(ctFont, &isFixedPitch); |
| |
| face = new SkTypeface_Mac(ctFont.release(), nullptr, cacheRequest.fStyle, isFixedPitch, |
| skFamilyName.c_str(), false); |
| SkTypefaceCache::Add(face, face->fontStyle()); |
| return face; |
| } |
| |
| class SkFontStyleSet_Mac : public SkFontStyleSet { |
| public: |
| SkFontStyleSet_Mac(CFStringRef familyName, CTFontDescriptorRef desc) |
| : fArray(CTFontDescriptorCreateMatchingFontDescriptors(desc, nullptr)) |
| , fFamilyName(familyName) |
| , fCount(0) { |
| CFRetain(familyName); |
| if (nullptr == fArray) { |
| fArray = CFArrayCreate(nullptr, nullptr, 0, nullptr); |
| } |
| fCount = SkToInt(CFArrayGetCount(fArray)); |
| } |
| |
| virtual ~SkFontStyleSet_Mac() { |
| CFRelease(fArray); |
| CFRelease(fFamilyName); |
| } |
| |
| int count() override { |
| return fCount; |
| } |
| |
| void getStyle(int index, SkFontStyle* style, SkString* name) override { |
| SkASSERT((unsigned)index < (unsigned)fCount); |
| CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray, index); |
| if (style) { |
| *style = fontstyle_from_descriptor(desc); |
| } |
| if (name) { |
| if (!find_desc_str(desc, kCTFontStyleNameAttribute, name)) { |
| name->reset(); |
| } |
| } |
| } |
| |
| SkTypeface* createTypeface(int index) override { |
| SkASSERT((unsigned)index < (unsigned)CFArrayGetCount(fArray)); |
| CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray, index); |
| |
| return createFromDesc(fFamilyName, desc); |
| } |
| |
| SkTypeface* matchStyle(const SkFontStyle& pattern) override { |
| if (0 == fCount) { |
| return nullptr; |
| } |
| return createFromDesc(fFamilyName, findMatchingDesc(pattern)); |
| } |
| |
| private: |
| CFArrayRef fArray; |
| CFStringRef fFamilyName; |
| int fCount; |
| |
| CTFontDescriptorRef findMatchingDesc(const SkFontStyle& pattern) const { |
| int bestMetric = SK_MaxS32; |
| CTFontDescriptorRef bestDesc = nullptr; |
| |
| for (int i = 0; i < fCount; ++i) { |
| CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray, i); |
| int metric = compute_metric(pattern, fontstyle_from_descriptor(desc)); |
| if (0 == metric) { |
| return desc; |
| } |
| if (metric < bestMetric) { |
| bestMetric = metric; |
| bestDesc = desc; |
| } |
| } |
| SkASSERT(bestDesc); |
| return bestDesc; |
| } |
| }; |
| |
| class SkFontMgr_Mac : public SkFontMgr { |
| CFArrayRef fNames; |
| int fCount; |
| |
| CFStringRef stringAt(int index) const { |
| SkASSERT((unsigned)index < (unsigned)fCount); |
| return (CFStringRef)CFArrayGetValueAtIndex(fNames, index); |
| } |
| |
| static SkFontStyleSet* CreateSet(CFStringRef cfFamilyName) { |
| AutoCFRelease<CFMutableDictionaryRef> cfAttr( |
| CFDictionaryCreateMutable(kCFAllocatorDefault, 0, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks)); |
| |
| CFDictionaryAddValue(cfAttr, kCTFontFamilyNameAttribute, cfFamilyName); |
| |
| AutoCFRelease<CTFontDescriptorRef> desc( |
| CTFontDescriptorCreateWithAttributes(cfAttr)); |
| return new SkFontStyleSet_Mac(cfFamilyName, desc); |
| } |
| |
| public: |
| SkFontMgr_Mac() |
| : fNames(SkCTFontManagerCopyAvailableFontFamilyNames()) |
| , fCount(fNames ? SkToInt(CFArrayGetCount(fNames)) : 0) {} |
| |
| virtual ~SkFontMgr_Mac() { |
| CFSafeRelease(fNames); |
| } |
| |
| protected: |
| int onCountFamilies() const override { |
| return fCount; |
| } |
| |
| void onGetFamilyName(int index, SkString* familyName) const override { |
| if ((unsigned)index < (unsigned)fCount) { |
| CFStringToSkString(this->stringAt(index), familyName); |
| } else { |
| familyName->reset(); |
| } |
| } |
| |
| SkFontStyleSet* onCreateStyleSet(int index) const override { |
| if ((unsigned)index >= (unsigned)fCount) { |
| return nullptr; |
| } |
| return CreateSet(this->stringAt(index)); |
| } |
| |
| SkFontStyleSet* onMatchFamily(const char familyName[]) const override { |
| AutoCFRelease<CFStringRef> cfName(make_CFString(familyName)); |
| return CreateSet(cfName); |
| } |
| |
| virtual SkTypeface* onMatchFamilyStyle(const char familyName[], |
| const SkFontStyle& fontStyle) const override { |
| SkAutoTUnref<SkFontStyleSet> sset(this->matchFamily(familyName)); |
| return sset->matchStyle(fontStyle); |
| } |
| |
| virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, |
| const char* bcp47[], int bcp47Count, |
| SkUnichar character) const override { |
| return nullptr; |
| } |
| |
| virtual SkTypeface* onMatchFaceStyle(const SkTypeface* familyMember, |
| const SkFontStyle&) const override { |
| return nullptr; |
| } |
| |
| SkTypeface* onCreateFromData(SkData* data, int ttcIndex) const override { |
| AutoCFRelease<CGDataProviderRef> pr(SkCreateDataProviderFromData(data)); |
| if (nullptr == pr) { |
| return nullptr; |
| } |
| return create_from_dataProvider(pr); |
| } |
| |
| SkTypeface* onCreateFromStream(SkStreamAsset* stream, int ttcIndex) const override { |
| AutoCFRelease<CGDataProviderRef> pr(SkCreateDataProviderFromStream(stream)); |
| if (nullptr == pr) { |
| return nullptr; |
| } |
| return create_from_dataProvider(pr); |
| } |
| |
| static CFNumberRef get_tag_for_name(CFStringRef name, CFArrayRef ctAxes) { |
| CFIndex ctAxisCount = CFArrayGetCount(ctAxes); |
| for (int i = 0; i < ctAxisCount; ++i) { |
| CFTypeRef ctAxisInfo = CFArrayGetValueAtIndex(ctAxes, i); |
| if (CFDictionaryGetTypeID() != CFGetTypeID(ctAxisInfo)) { |
| return nullptr; |
| } |
| CFDictionaryRef ctAxisInfoDict = static_cast<CFDictionaryRef>(ctAxisInfo); |
| |
| CFTypeRef ctAxisName = CFDictionaryGetValue(ctAxisInfoDict, |
| kCTFontVariationAxisNameKey); |
| if (!ctAxisName || CFGetTypeID(ctAxisName) != CFStringGetTypeID()) { |
| return nullptr; |
| } |
| |
| if (CFEqual(name, ctAxisName)) { |
| CFTypeRef tag = CFDictionaryGetValue(ctAxisInfoDict, |
| kCTFontVariationAxisIdentifierKey); |
| if (!tag || CFGetTypeID(tag) != CFNumberGetTypeID()) { |
| return nullptr; |
| } |
| return static_cast<CFNumberRef>(tag); |
| } |
| } |
| return nullptr; |
| } |
| static CFDictionaryRef get_axes(CGFontRef cg, const FontParameters& params) { |
| AutoCFRelease<CFArrayRef> cgAxes(CGFontCopyVariationAxes(cg)); |
| if (!cgAxes) { |
| return nullptr; |
| } |
| CFIndex axisCount = CFArrayGetCount(cgAxes); |
| |
| // The CGFont variation data is keyed by name, and lacks the tag. |
| // The CTFont variation data is keyed by tag, and also has the name. |
| // We would like to work with CTFont variaitons, but creating a CTFont font with |
| // CTFont variation dictionary runs into bugs. So use the CTFont variation data |
| // to match names to tags to create the appropriate CGFont. |
| AutoCFRelease<CTFontRef> ct(CTFontCreateWithGraphicsFont(cg, 0, nullptr, nullptr)); |
| AutoCFRelease<CFArrayRef> ctAxes(CTFontCopyVariationAxes(ct)); |
| if (!ctAxes || CFArrayGetCount(ctAxes) != axisCount) { |
| return nullptr; |
| } |
| |
| int paramAxisCount; |
| const FontParameters::Axis* paramAxes = params.getAxes(¶mAxisCount); |
| |
| CFMutableDictionaryRef dict = CFDictionaryCreateMutable(kCFAllocatorDefault, axisCount, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks); |
| for (int i = 0; i < axisCount; ++i) { |
| CFTypeRef axisInfo = CFArrayGetValueAtIndex(cgAxes, i); |
| if (CFDictionaryGetTypeID() != CFGetTypeID(axisInfo)) { |
| return nullptr; |
| } |
| CFDictionaryRef axisInfoDict = static_cast<CFDictionaryRef>(axisInfo); |
| |
| CFTypeRef axisName = CFDictionaryGetValue(axisInfoDict, kCGFontVariationAxisName); |
| if (!axisName || CFGetTypeID(axisName) != CFStringGetTypeID()) { |
| return nullptr; |
| } |
| |
| CFNumberRef tagNumber = get_tag_for_name(static_cast<CFStringRef>(axisName), ctAxes); |
| if (!tagNumber) { |
| // Could not find a tag to go with the name of this index. |
| // This would be a bug in CG/CT. |
| continue; |
| } |
| int64_t tagLong; |
| if (!CFNumberGetValue(tagNumber, kCFNumberSInt64Type, &tagLong)) { |
| return nullptr; |
| } |
| |
| // The variation axes can be set to any value, but cg will effectively pin them. |
| // Pin them here to normalize. |
| CFTypeRef min = CFDictionaryGetValue(axisInfoDict, kCGFontVariationAxisMinValue); |
| CFTypeRef max = CFDictionaryGetValue(axisInfoDict, kCGFontVariationAxisMaxValue); |
| CFTypeRef def = CFDictionaryGetValue(axisInfoDict, kCGFontVariationAxisDefaultValue); |
| if (!min || CFGetTypeID(min) != CFNumberGetTypeID() || |
| !max || CFGetTypeID(max) != CFNumberGetTypeID() || |
| !def || CFGetTypeID(def) != CFNumberGetTypeID()) |
| { |
| return nullptr; |
| } |
| CFNumberRef minNumber = static_cast<CFNumberRef>(min); |
| CFNumberRef maxNumber = static_cast<CFNumberRef>(max); |
| CFNumberRef defNumber = static_cast<CFNumberRef>(def); |
| double minDouble; |
| double maxDouble; |
| double defDouble; |
| if (!CFNumberGetValue(minNumber, kCFNumberDoubleType, &minDouble) || |
| !CFNumberGetValue(maxNumber, kCFNumberDoubleType, &maxDouble) || |
| !CFNumberGetValue(defNumber, kCFNumberDoubleType, &defDouble)) |
| { |
| return nullptr; |
| } |
| |
| double value = defDouble; |
| for (int j = 0; j < paramAxisCount; ++j) { |
| if (paramAxes[j].fTag == tagLong) { |
| value = SkTPin(SkScalarToDouble(paramAxes[j].fStyleValue),minDouble,maxDouble); |
| break; |
| } |
| } |
| CFNumberRef valueNumber = CFNumberCreate(kCFAllocatorDefault, kCFNumberDoubleType, |
| &value); |
| CFDictionaryAddValue(dict, axisName, valueNumber); |
| CFRelease(valueNumber); |
| } |
| return dict; |
| } |
| SkTypeface* onCreateFromStream(SkStreamAsset* s, const FontParameters& params) const override { |
| AutoCFRelease<CGDataProviderRef> provider(SkCreateDataProviderFromStream(s)); |
| if (nullptr == provider) { |
| return nullptr; |
| } |
| AutoCFRelease<CGFontRef> cg(CGFontCreateWithDataProvider(provider)); |
| if (nullptr == cg) { |
| return nullptr; |
| } |
| |
| AutoCFRelease<CFDictionaryRef> cgVariations(get_axes(cg, params)); |
| // The CGFontRef returned by CGFontCreateCopyWithVariations when the passed CGFontRef was |
| // created from a data provider does not appear to have any ownership of the underlying |
| // data. The original CGFontRef must be kept alive until the copy will no longer be used. |
| AutoCFRelease<CGFontRef> cgVariant; |
| if (cgVariations) { |
| cgVariant.reset(CGFontCreateCopyWithVariations(cg, cgVariations)); |
| } else { |
| cgVariant.reset(cg.release()); |
| } |
| |
| CTFontRef ct = CTFontCreateWithGraphicsFont(cgVariant, 0, nullptr, nullptr); |
| if (!ct) { |
| return nullptr; |
| } |
| return NewFromFontRef(ct, cg.release(), nullptr, true); |
| } |
| |
| static CFDictionaryRef get_axes(CGFontRef cg, SkFontData* fontData) { |
| AutoCFRelease<CFArrayRef> cgAxes(CGFontCopyVariationAxes(cg)); |
| if (!cgAxes) { |
| return nullptr; |
| } |
| |
| CFIndex axisCount = CFArrayGetCount(cgAxes); |
| if (0 == axisCount || axisCount != fontData->getAxisCount()) { |
| return nullptr; |
| } |
| |
| CFMutableDictionaryRef dict = CFDictionaryCreateMutable(kCFAllocatorDefault, axisCount, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks); |
| for (int i = 0; i < fontData->getAxisCount(); ++i) { |
| CFTypeRef axisInfo = CFArrayGetValueAtIndex(cgAxes, i); |
| if (CFDictionaryGetTypeID() != CFGetTypeID(axisInfo)) { |
| return nullptr; |
| } |
| CFDictionaryRef axisInfoDict = static_cast<CFDictionaryRef>(axisInfo); |
| |
| CFTypeRef axisName = CFDictionaryGetValue(axisInfoDict, kCGFontVariationAxisName); |
| if (!axisName || CFGetTypeID(axisName) != CFStringGetTypeID()) { |
| return nullptr; |
| } |
| |
| // The variation axes can be set to any value, but cg will effectively pin them. |
| // Pin them here to normalize. |
| CFTypeRef min = CFDictionaryGetValue(axisInfoDict, kCGFontVariationAxisMinValue); |
| CFTypeRef max = CFDictionaryGetValue(axisInfoDict, kCGFontVariationAxisMaxValue); |
| if (!min || CFGetTypeID(min) != CFNumberGetTypeID() || |
| !max || CFGetTypeID(max) != CFNumberGetTypeID()) |
| { |
| return nullptr; |
| } |
| CFNumberRef minNumber = static_cast<CFNumberRef>(min); |
| CFNumberRef maxNumber = static_cast<CFNumberRef>(max); |
| double minDouble; |
| double maxDouble; |
| if (!CFNumberGetValue(minNumber, kCFNumberDoubleType, &minDouble) || |
| !CFNumberGetValue(maxNumber, kCFNumberDoubleType, &maxDouble)) |
| { |
| return nullptr; |
| } |
| double value = SkTPin(SkFixedToDouble(fontData->getAxis()[i]), minDouble, maxDouble); |
| CFNumberRef valueNumber = CFNumberCreate(kCFAllocatorDefault, kCFNumberDoubleType, |
| &value); |
| |
| CFDictionaryAddValue(dict, axisName, valueNumber); |
| CFRelease(valueNumber); |
| } |
| return dict; |
| } |
| SkTypeface* onCreateFromFontData(SkFontData* data) const override { |
| SkAutoTDelete<SkFontData> fontData(data); |
| SkStreamAsset* stream = fontData->detachStream(); |
| AutoCFRelease<CGDataProviderRef> provider(SkCreateDataProviderFromStream(stream)); |
| if (nullptr == provider) { |
| return nullptr; |
| } |
| AutoCFRelease<CGFontRef> cg(CGFontCreateWithDataProvider(provider)); |
| if (nullptr == cg) { |
| return nullptr; |
| } |
| |
| AutoCFRelease<CFDictionaryRef> cgVariations(get_axes(cg, fontData)); |
| // The CGFontRef returned by CGFontCreateCopyWithVariations when the passed CGFontRef was |
| // created from a data provider does not appear to have any ownership of the underlying |
| // data. The original CGFontRef must be kept alive until the copy will no longer be used. |
| AutoCFRelease<CGFontRef> cgVariant; |
| if (cgVariations) { |
| cgVariant.reset(CGFontCreateCopyWithVariations(cg, cgVariations)); |
| } else { |
| cgVariant.reset(cg.release()); |
| } |
| |
| CTFontRef ct = CTFontCreateWithGraphicsFont(cgVariant, 0, nullptr, nullptr); |
| if (!ct) { |
| return nullptr; |
| } |
| return NewFromFontRef(ct, cg.release(), nullptr, true); |
| } |
| |
| SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const override { |
| AutoCFRelease<CGDataProviderRef> pr(CGDataProviderCreateWithFilename(path)); |
| if (nullptr == pr) { |
| return nullptr; |
| } |
| return create_from_dataProvider(pr); |
| } |
| |
| virtual SkTypeface* onLegacyCreateTypeface(const char familyName[], |
| unsigned styleBits) const override { |
| |
| SkFontStyle style = SkFontStyle((SkTypeface::Style)styleBits); |
| if (familyName) { |
| familyName = map_css_names(familyName); |
| } |
| |
| if (!familyName || !*familyName) { |
| familyName = FONT_DEFAULT_NAME; |
| } |
| |
| NameStyle cacheRequest = { familyName, style }; |
| SkTypeface* face = SkTypefaceCache::FindByProcAndRef(find_by_NameStyle, &cacheRequest); |
| |
| if (nullptr == face) { |
| face = NewFromName(familyName, style); |
| if (face) { |
| SkTypefaceCache::Add(face, style); |
| } else { |
| face = GetDefaultFace(); |
| face->ref(); |
| } |
| } |
| return face; |
| } |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkFontMgr* SkFontMgr::Factory() { return new SkFontMgr_Mac; } |
| |
| #endif//defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) |