1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/ports/SkFontHost_mac.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,2340 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2006 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +#include <vector>
1.13 +#ifdef SK_BUILD_FOR_MAC
1.14 +#import <ApplicationServices/ApplicationServices.h>
1.15 +#endif
1.16 +
1.17 +#ifdef SK_BUILD_FOR_IOS
1.18 +#include <CoreText/CoreText.h>
1.19 +#include <CoreText/CTFontManager.h>
1.20 +#include <CoreGraphics/CoreGraphics.h>
1.21 +#include <CoreFoundation/CoreFoundation.h>
1.22 +#endif
1.23 +
1.24 +#include "SkFontHost.h"
1.25 +#include "SkCGUtils.h"
1.26 +#include "SkColorPriv.h"
1.27 +#include "SkDescriptor.h"
1.28 +#include "SkEndian.h"
1.29 +#include "SkFontDescriptor.h"
1.30 +#include "SkFloatingPoint.h"
1.31 +#include "SkGlyph.h"
1.32 +#include "SkMaskGamma.h"
1.33 +#include "SkSFNTHeader.h"
1.34 +#include "SkOTTable_glyf.h"
1.35 +#include "SkOTTable_head.h"
1.36 +#include "SkOTTable_hhea.h"
1.37 +#include "SkOTTable_loca.h"
1.38 +#include "SkOTUtils.h"
1.39 +#include "SkPaint.h"
1.40 +#include "SkPath.h"
1.41 +#include "SkString.h"
1.42 +#include "SkStream.h"
1.43 +#include "SkThread.h"
1.44 +#include "SkTypeface_mac.h"
1.45 +#include "SkUtils.h"
1.46 +#include "SkTypefaceCache.h"
1.47 +#include "SkFontMgr.h"
1.48 +#include "SkUtils.h"
1.49 +
1.50 +//#define HACK_COLORGLYPHS
1.51 +
1.52 +class SkScalerContext_Mac;
1.53 +
1.54 +// CTFontManagerCopyAvailableFontFamilyNames() is not always available, so we
1.55 +// provide a wrapper here that will return an empty array if need be.
1.56 +static CFArrayRef SkCTFontManagerCopyAvailableFontFamilyNames() {
1.57 +#ifdef SK_BUILD_FOR_IOS
1.58 + return CFArrayCreate(NULL, NULL, 0, NULL);
1.59 +#else
1.60 + return CTFontManagerCopyAvailableFontFamilyNames();
1.61 +#endif
1.62 +}
1.63 +
1.64 +
1.65 +// Being templated and taking const T* prevents calling
1.66 +// CFSafeRelease(autoCFRelease) through implicit conversion.
1.67 +template <typename T> static void CFSafeRelease(/*CFTypeRef*/const T* cfTypeRef) {
1.68 + if (cfTypeRef) {
1.69 + CFRelease(cfTypeRef);
1.70 + }
1.71 +}
1.72 +
1.73 +// Being templated and taking const T* prevents calling
1.74 +// CFSafeRetain(autoCFRelease) through implicit conversion.
1.75 +template <typename T> static void CFSafeRetain(/*CFTypeRef*/const T* cfTypeRef) {
1.76 + if (cfTypeRef) {
1.77 + CFRetain(cfTypeRef);
1.78 + }
1.79 +}
1.80 +
1.81 +/** Acts like a CFRef, but calls CFSafeRelease when it goes out of scope. */
1.82 +template<typename CFRef> class AutoCFRelease : private SkNoncopyable {
1.83 +public:
1.84 + explicit AutoCFRelease(CFRef cfRef = NULL) : fCFRef(cfRef) { }
1.85 + ~AutoCFRelease() { CFSafeRelease(fCFRef); }
1.86 +
1.87 + void reset(CFRef that = NULL) {
1.88 + CFSafeRetain(that);
1.89 + CFSafeRelease(fCFRef);
1.90 + fCFRef = that;
1.91 + }
1.92 +
1.93 + AutoCFRelease& operator =(CFRef that) {
1.94 + reset(that);
1.95 + return *this;
1.96 + }
1.97 +
1.98 + operator CFRef() const { return fCFRef; }
1.99 + CFRef get() const { return fCFRef; }
1.100 +
1.101 + CFRef* operator&() { SkASSERT(fCFRef == NULL); return &fCFRef; }
1.102 +private:
1.103 + CFRef fCFRef;
1.104 +};
1.105 +
1.106 +static CFStringRef make_CFString(const char str[]) {
1.107 + return CFStringCreateWithCString(NULL, str, kCFStringEncodingUTF8);
1.108 +}
1.109 +
1.110 +template<typename T> class AutoCGTable : SkNoncopyable {
1.111 +public:
1.112 + AutoCGTable(CGFontRef font)
1.113 + //Undocumented: the tag parameter in this call is expected in machine order and not BE order.
1.114 + : fCFData(CGFontCopyTableForTag(font, SkSetFourByteTag(T::TAG0, T::TAG1, T::TAG2, T::TAG3)))
1.115 + , fData(fCFData ? reinterpret_cast<const T*>(CFDataGetBytePtr(fCFData)) : NULL)
1.116 + { }
1.117 +
1.118 + const T* operator->() const { return fData; }
1.119 +
1.120 +private:
1.121 + AutoCFRelease<CFDataRef> fCFData;
1.122 +public:
1.123 + const T* fData;
1.124 +};
1.125 +
1.126 +// inline versions of these rect helpers
1.127 +
1.128 +static bool CGRectIsEmpty_inline(const CGRect& rect) {
1.129 + return rect.size.width <= 0 || rect.size.height <= 0;
1.130 +}
1.131 +
1.132 +static CGFloat CGRectGetMinX_inline(const CGRect& rect) {
1.133 + return rect.origin.x;
1.134 +}
1.135 +
1.136 +static CGFloat CGRectGetMaxX_inline(const CGRect& rect) {
1.137 + return rect.origin.x + rect.size.width;
1.138 +}
1.139 +
1.140 +static CGFloat CGRectGetMinY_inline(const CGRect& rect) {
1.141 + return rect.origin.y;
1.142 +}
1.143 +
1.144 +static CGFloat CGRectGetMaxY_inline(const CGRect& rect) {
1.145 + return rect.origin.y + rect.size.height;
1.146 +}
1.147 +
1.148 +static CGFloat CGRectGetWidth_inline(const CGRect& rect) {
1.149 + return rect.size.width;
1.150 +}
1.151 +
1.152 +///////////////////////////////////////////////////////////////////////////////
1.153 +
1.154 +static void sk_memset_rect32(uint32_t* ptr, uint32_t value,
1.155 + int width, int height, size_t rowBytes) {
1.156 + SkASSERT(width);
1.157 + SkASSERT(width * sizeof(uint32_t) <= rowBytes);
1.158 +
1.159 + if (width >= 32) {
1.160 + while (height) {
1.161 + sk_memset32(ptr, value, width);
1.162 + ptr = (uint32_t*)((char*)ptr + rowBytes);
1.163 + height -= 1;
1.164 + }
1.165 + return;
1.166 + }
1.167 +
1.168 + rowBytes -= width * sizeof(uint32_t);
1.169 +
1.170 + if (width >= 8) {
1.171 + while (height) {
1.172 + int w = width;
1.173 + do {
1.174 + *ptr++ = value; *ptr++ = value;
1.175 + *ptr++ = value; *ptr++ = value;
1.176 + *ptr++ = value; *ptr++ = value;
1.177 + *ptr++ = value; *ptr++ = value;
1.178 + w -= 8;
1.179 + } while (w >= 8);
1.180 + while (--w >= 0) {
1.181 + *ptr++ = value;
1.182 + }
1.183 + ptr = (uint32_t*)((char*)ptr + rowBytes);
1.184 + height -= 1;
1.185 + }
1.186 + } else {
1.187 + while (height) {
1.188 + int w = width;
1.189 + do {
1.190 + *ptr++ = value;
1.191 + } while (--w > 0);
1.192 + ptr = (uint32_t*)((char*)ptr + rowBytes);
1.193 + height -= 1;
1.194 + }
1.195 + }
1.196 +}
1.197 +
1.198 +#include <sys/utsname.h>
1.199 +
1.200 +typedef uint32_t CGRGBPixel;
1.201 +
1.202 +static unsigned CGRGBPixel_getAlpha(CGRGBPixel pixel) {
1.203 + return pixel & 0xFF;
1.204 +}
1.205 +
1.206 +// The calls to support subpixel are present in 10.5, but are not included in
1.207 +// the 10.5 SDK. The needed calls have been extracted from the 10.6 SDK and are
1.208 +// included below. To verify that CGContextSetShouldSubpixelQuantizeFonts, for
1.209 +// instance, is present in the 10.5 CoreGraphics libary, use:
1.210 +// cd /Developer/SDKs/MacOSX10.5.sdk/System/Library/Frameworks/
1.211 +// cd ApplicationServices.framework/Frameworks/CoreGraphics.framework/
1.212 +// nm CoreGraphics | grep CGContextSetShouldSubpixelQuantizeFonts
1.213 +
1.214 +#if !defined(MAC_OS_X_VERSION_10_6) || (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6)
1.215 +CG_EXTERN void CGContextSetAllowsFontSmoothing(CGContextRef context, bool value);
1.216 +CG_EXTERN void CGContextSetAllowsFontSubpixelPositioning(CGContextRef context, bool value);
1.217 +CG_EXTERN void CGContextSetShouldSubpixelPositionFonts(CGContextRef context, bool value);
1.218 +CG_EXTERN void CGContextSetAllowsFontSubpixelQuantization(CGContextRef context, bool value);
1.219 +CG_EXTERN void CGContextSetShouldSubpixelQuantizeFonts(CGContextRef context, bool value);
1.220 +#endif
1.221 +
1.222 +static const char FONT_DEFAULT_NAME[] = "Lucida Sans";
1.223 +
1.224 +// See Source/WebKit/chromium/base/mac/mac_util.mm DarwinMajorVersionInternal for original source.
1.225 +static int readVersion() {
1.226 + struct utsname info;
1.227 + if (uname(&info) != 0) {
1.228 + SkDebugf("uname failed\n");
1.229 + return 0;
1.230 + }
1.231 + if (strcmp(info.sysname, "Darwin") != 0) {
1.232 + SkDebugf("unexpected uname sysname %s\n", info.sysname);
1.233 + return 0;
1.234 + }
1.235 + char* dot = strchr(info.release, '.');
1.236 + if (!dot) {
1.237 + SkDebugf("expected dot in uname release %s\n", info.release);
1.238 + return 0;
1.239 + }
1.240 + int version = atoi(info.release);
1.241 + if (version == 0) {
1.242 + SkDebugf("could not parse uname release %s\n", info.release);
1.243 + }
1.244 + return version;
1.245 +}
1.246 +
1.247 +static int darwinVersion() {
1.248 + static int darwin_version = readVersion();
1.249 + return darwin_version;
1.250 +}
1.251 +
1.252 +static bool isSnowLeopard() {
1.253 + return darwinVersion() == 10;
1.254 +}
1.255 +
1.256 +static bool isLion() {
1.257 + return darwinVersion() == 11;
1.258 +}
1.259 +
1.260 +static bool isMountainLion() {
1.261 + return darwinVersion() == 12;
1.262 +}
1.263 +
1.264 +static bool isLCDFormat(unsigned format) {
1.265 + return SkMask::kLCD16_Format == format || SkMask::kLCD32_Format == format;
1.266 +}
1.267 +
1.268 +static CGFloat ScalarToCG(SkScalar scalar) {
1.269 + if (sizeof(CGFloat) == sizeof(float)) {
1.270 + return SkScalarToFloat(scalar);
1.271 + } else {
1.272 + SkASSERT(sizeof(CGFloat) == sizeof(double));
1.273 + return (CGFloat) SkScalarToDouble(scalar);
1.274 + }
1.275 +}
1.276 +
1.277 +static SkScalar CGToScalar(CGFloat cgFloat) {
1.278 + if (sizeof(CGFloat) == sizeof(float)) {
1.279 + return cgFloat;
1.280 + } else {
1.281 + SkASSERT(sizeof(CGFloat) == sizeof(double));
1.282 + return SkDoubleToScalar(cgFloat);
1.283 + }
1.284 +}
1.285 +
1.286 +static CGAffineTransform MatrixToCGAffineTransform(const SkMatrix& matrix,
1.287 + SkScalar sx = SK_Scalar1,
1.288 + SkScalar sy = SK_Scalar1) {
1.289 + return CGAffineTransformMake( ScalarToCG(matrix[SkMatrix::kMScaleX] * sx),
1.290 + -ScalarToCG(matrix[SkMatrix::kMSkewY] * sy),
1.291 + -ScalarToCG(matrix[SkMatrix::kMSkewX] * sx),
1.292 + ScalarToCG(matrix[SkMatrix::kMScaleY] * sy),
1.293 + ScalarToCG(matrix[SkMatrix::kMTransX] * sx),
1.294 + ScalarToCG(matrix[SkMatrix::kMTransY] * sy));
1.295 +}
1.296 +
1.297 +///////////////////////////////////////////////////////////////////////////////
1.298 +
1.299 +#define BITMAP_INFO_RGB (kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Host)
1.300 +#define BITMAP_INFO_GRAY (kCGImageAlphaNone)
1.301 +
1.302 +/**
1.303 + * There does not appear to be a publicly accessable API for determining if lcd
1.304 + * font smoothing will be applied if we request it. The main issue is that if
1.305 + * smoothing is applied a gamma of 2.0 will be used, if not a gamma of 1.0.
1.306 + */
1.307 +static bool supports_LCD() {
1.308 + static int gSupportsLCD = -1;
1.309 + if (gSupportsLCD >= 0) {
1.310 + return (bool) gSupportsLCD;
1.311 + }
1.312 + uint32_t rgb = 0;
1.313 + AutoCFRelease<CGColorSpaceRef> colorspace(CGColorSpaceCreateDeviceRGB());
1.314 + AutoCFRelease<CGContextRef> cgContext(CGBitmapContextCreate(&rgb, 1, 1, 8, 4,
1.315 + colorspace, BITMAP_INFO_RGB));
1.316 + CGContextSelectFont(cgContext, "Helvetica", 16, kCGEncodingMacRoman);
1.317 + CGContextSetShouldSmoothFonts(cgContext, true);
1.318 + CGContextSetShouldAntialias(cgContext, true);
1.319 + CGContextSetTextDrawingMode(cgContext, kCGTextFill);
1.320 + CGContextSetGrayFillColor(cgContext, 1, 1);
1.321 + CGContextShowTextAtPoint(cgContext, -1, 0, "|", 1);
1.322 + uint32_t r = (rgb >> 16) & 0xFF;
1.323 + uint32_t g = (rgb >> 8) & 0xFF;
1.324 + uint32_t b = (rgb >> 0) & 0xFF;
1.325 + gSupportsLCD = (r != g || r != b);
1.326 + return (bool) gSupportsLCD;
1.327 +}
1.328 +
1.329 +class Offscreen {
1.330 +public:
1.331 + Offscreen();
1.332 +
1.333 + CGRGBPixel* getCG(const SkScalerContext_Mac& context, const SkGlyph& glyph,
1.334 + CGGlyph glyphID, size_t* rowBytesPtr,
1.335 + bool generateA8FromLCD);
1.336 +
1.337 +private:
1.338 + enum {
1.339 + kSize = 32 * 32 * sizeof(CGRGBPixel)
1.340 + };
1.341 + SkAutoSMalloc<kSize> fImageStorage;
1.342 + AutoCFRelease<CGColorSpaceRef> fRGBSpace;
1.343 +
1.344 + // cached state
1.345 + AutoCFRelease<CGContextRef> fCG;
1.346 + SkISize fSize;
1.347 + bool fDoAA;
1.348 + bool fDoLCD;
1.349 +
1.350 + static int RoundSize(int dimension) {
1.351 + return SkNextPow2(dimension);
1.352 + }
1.353 +};
1.354 +
1.355 +Offscreen::Offscreen() : fRGBSpace(NULL), fCG(NULL),
1.356 + fDoAA(false), fDoLCD(false) {
1.357 + fSize.set(0, 0);
1.358 +}
1.359 +
1.360 +///////////////////////////////////////////////////////////////////////////////
1.361 +
1.362 +static SkTypeface::Style computeStyleBits(CTFontRef font, bool* isFixedPitch) {
1.363 + unsigned style = SkTypeface::kNormal;
1.364 + CTFontSymbolicTraits traits = CTFontGetSymbolicTraits(font);
1.365 +
1.366 + if (traits & kCTFontBoldTrait) {
1.367 + style |= SkTypeface::kBold;
1.368 + }
1.369 + if (traits & kCTFontItalicTrait) {
1.370 + style |= SkTypeface::kItalic;
1.371 + }
1.372 + if (isFixedPitch) {
1.373 + *isFixedPitch = (traits & kCTFontMonoSpaceTrait) != 0;
1.374 + }
1.375 + return (SkTypeface::Style)style;
1.376 +}
1.377 +
1.378 +static SkFontID CTFontRef_to_SkFontID(CTFontRef fontRef) {
1.379 + SkFontID id = 0;
1.380 +// CTFontGetPlatformFont and ATSFontRef are not supported on iOS, so we have to
1.381 +// bracket this to be Mac only.
1.382 +#ifdef SK_BUILD_FOR_MAC
1.383 + ATSFontRef ats = CTFontGetPlatformFont(fontRef, NULL);
1.384 + id = (SkFontID)ats;
1.385 + if (id != 0) {
1.386 + id &= 0x3FFFFFFF; // make top two bits 00
1.387 + return id;
1.388 + }
1.389 +#endif
1.390 + // CTFontGetPlatformFont returns NULL if the font is local
1.391 + // (e.g., was created by a CSS3 @font-face rule).
1.392 + AutoCFRelease<CGFontRef> cgFont(CTFontCopyGraphicsFont(fontRef, NULL));
1.393 + AutoCGTable<SkOTTableHead> headTable(cgFont);
1.394 + if (headTable.fData) {
1.395 + id = (SkFontID) headTable->checksumAdjustment;
1.396 + id = (id & 0x3FFFFFFF) | 0x40000000; // make top two bits 01
1.397 + }
1.398 + // well-formed fonts have checksums, but as a last resort, use the pointer.
1.399 + if (id == 0) {
1.400 + id = (SkFontID) (uintptr_t) fontRef;
1.401 + id = (id & 0x3FFFFFFF) | 0x80000000; // make top two bits 10
1.402 + }
1.403 + return id;
1.404 +}
1.405 +
1.406 +static SkFontStyle stylebits2fontstyle(SkTypeface::Style styleBits) {
1.407 + return SkFontStyle((styleBits & SkTypeface::kBold)
1.408 + ? SkFontStyle::kBold_Weight
1.409 + : SkFontStyle::kNormal_Weight,
1.410 + SkFontStyle::kNormal_Width,
1.411 + (styleBits & SkTypeface::kItalic)
1.412 + ? SkFontStyle::kItalic_Slant
1.413 + : SkFontStyle::kUpright_Slant);
1.414 +}
1.415 +
1.416 +#define WEIGHT_THRESHOLD ((SkFontStyle::kNormal_Weight + SkFontStyle::kBold_Weight)/2)
1.417 +
1.418 +static SkTypeface::Style fontstyle2stylebits(const SkFontStyle& fs) {
1.419 + unsigned style = 0;
1.420 + if (fs.width() >= WEIGHT_THRESHOLD) {
1.421 + style |= SkTypeface::kBold;
1.422 + }
1.423 + if (fs.isItalic()) {
1.424 + style |= SkTypeface::kItalic;
1.425 + }
1.426 + return (SkTypeface::Style)style;
1.427 +}
1.428 +
1.429 +class SkTypeface_Mac : public SkTypeface {
1.430 +public:
1.431 + SkTypeface_Mac(SkTypeface::Style style, SkFontID fontID, bool isFixedPitch,
1.432 + CTFontRef fontRef, const char name[])
1.433 + : SkTypeface(style, fontID, isFixedPitch)
1.434 + , fName(name)
1.435 + , fFontRef(fontRef) // caller has already called CFRetain for us
1.436 + , fFontStyle(stylebits2fontstyle(style))
1.437 + {
1.438 + SkASSERT(fontRef);
1.439 + }
1.440 +
1.441 + SkTypeface_Mac(const SkFontStyle& fs, SkFontID fontID, bool isFixedPitch,
1.442 + CTFontRef fontRef, const char name[])
1.443 + : SkTypeface(fontstyle2stylebits(fs), fontID, isFixedPitch)
1.444 + , fName(name)
1.445 + , fFontRef(fontRef) // caller has already called CFRetain for us
1.446 + , fFontStyle(fs)
1.447 + {
1.448 + SkASSERT(fontRef);
1.449 + }
1.450 +
1.451 + SkString fName;
1.452 + AutoCFRelease<CTFontRef> fFontRef;
1.453 + SkFontStyle fFontStyle;
1.454 +
1.455 +protected:
1.456 + friend class SkFontHost; // to access our protected members for deprecated methods
1.457 +
1.458 + virtual int onGetUPEM() const SK_OVERRIDE;
1.459 + virtual SkStream* onOpenStream(int* ttcIndex) const SK_OVERRIDE;
1.460 + virtual SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const SK_OVERRIDE;
1.461 + virtual int onGetTableTags(SkFontTableTag tags[]) const SK_OVERRIDE;
1.462 + virtual size_t onGetTableData(SkFontTableTag, size_t offset,
1.463 + size_t length, void* data) const SK_OVERRIDE;
1.464 + virtual SkScalerContext* onCreateScalerContext(const SkDescriptor*) const SK_OVERRIDE;
1.465 + virtual void onFilterRec(SkScalerContextRec*) const SK_OVERRIDE;
1.466 + virtual void onGetFontDescriptor(SkFontDescriptor*, bool*) const SK_OVERRIDE;
1.467 + virtual SkAdvancedTypefaceMetrics* onGetAdvancedTypefaceMetrics(
1.468 + SkAdvancedTypefaceMetrics::PerGlyphInfo,
1.469 + const uint32_t*, uint32_t) const SK_OVERRIDE;
1.470 + virtual int onCharsToGlyphs(const void* chars, Encoding, uint16_t glyphs[],
1.471 + int glyphCount) const SK_OVERRIDE;
1.472 + virtual int onCountGlyphs() const SK_OVERRIDE;
1.473 +
1.474 +private:
1.475 +
1.476 + typedef SkTypeface INHERITED;
1.477 +};
1.478 +
1.479 +static SkTypeface* NewFromFontRef(CTFontRef fontRef, const char name[]) {
1.480 + SkASSERT(fontRef);
1.481 + bool isFixedPitch;
1.482 + SkTypeface::Style style = computeStyleBits(fontRef, &isFixedPitch);
1.483 + SkFontID fontID = CTFontRef_to_SkFontID(fontRef);
1.484 +
1.485 + return new SkTypeface_Mac(style, fontID, isFixedPitch, fontRef, name);
1.486 +}
1.487 +
1.488 +static SkTypeface* NewFromName(const char familyName[], SkTypeface::Style theStyle) {
1.489 + CTFontRef ctFont = NULL;
1.490 +
1.491 + CTFontSymbolicTraits ctFontTraits = 0;
1.492 + if (theStyle & SkTypeface::kBold) {
1.493 + ctFontTraits |= kCTFontBoldTrait;
1.494 + }
1.495 + if (theStyle & SkTypeface::kItalic) {
1.496 + ctFontTraits |= kCTFontItalicTrait;
1.497 + }
1.498 +
1.499 + // Create the font info
1.500 + AutoCFRelease<CFStringRef> cfFontName(make_CFString(familyName));
1.501 +
1.502 + AutoCFRelease<CFNumberRef> cfFontTraits(
1.503 + CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &ctFontTraits));
1.504 +
1.505 + AutoCFRelease<CFMutableDictionaryRef> cfAttributes(
1.506 + CFDictionaryCreateMutable(kCFAllocatorDefault, 0,
1.507 + &kCFTypeDictionaryKeyCallBacks,
1.508 + &kCFTypeDictionaryValueCallBacks));
1.509 +
1.510 + AutoCFRelease<CFMutableDictionaryRef> cfTraits(
1.511 + CFDictionaryCreateMutable(kCFAllocatorDefault, 0,
1.512 + &kCFTypeDictionaryKeyCallBacks,
1.513 + &kCFTypeDictionaryValueCallBacks));
1.514 +
1.515 + // Create the font
1.516 + if (cfFontName != NULL && cfFontTraits != NULL && cfAttributes != NULL && cfTraits != NULL) {
1.517 + CFDictionaryAddValue(cfTraits, kCTFontSymbolicTrait, cfFontTraits);
1.518 +
1.519 + CFDictionaryAddValue(cfAttributes, kCTFontFamilyNameAttribute, cfFontName);
1.520 + CFDictionaryAddValue(cfAttributes, kCTFontTraitsAttribute, cfTraits);
1.521 +
1.522 + AutoCFRelease<CTFontDescriptorRef> ctFontDesc(
1.523 + CTFontDescriptorCreateWithAttributes(cfAttributes));
1.524 +
1.525 + if (ctFontDesc != NULL) {
1.526 + ctFont = CTFontCreateWithFontDescriptor(ctFontDesc, 0, NULL);
1.527 + }
1.528 + }
1.529 +
1.530 + return ctFont ? NewFromFontRef(ctFont, familyName) : NULL;
1.531 +}
1.532 +
1.533 +static SkTypeface* GetDefaultFace() {
1.534 + SK_DECLARE_STATIC_MUTEX(gMutex);
1.535 + SkAutoMutexAcquire ma(gMutex);
1.536 +
1.537 + static SkTypeface* gDefaultFace;
1.538 +
1.539 + if (NULL == gDefaultFace) {
1.540 + gDefaultFace = NewFromName(FONT_DEFAULT_NAME, SkTypeface::kNormal);
1.541 + SkTypefaceCache::Add(gDefaultFace, SkTypeface::kNormal);
1.542 + }
1.543 + return gDefaultFace;
1.544 +}
1.545 +
1.546 +///////////////////////////////////////////////////////////////////////////////
1.547 +
1.548 +extern CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face);
1.549 +CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face) {
1.550 + const SkTypeface_Mac* macface = (const SkTypeface_Mac*)face;
1.551 + return macface ? macface->fFontRef.get() : NULL;
1.552 +}
1.553 +
1.554 +/* This function is visible on the outside. It first searches the cache, and if
1.555 + * not found, returns a new entry (after adding it to the cache).
1.556 + */
1.557 +SkTypeface* SkCreateTypefaceFromCTFont(CTFontRef fontRef) {
1.558 + SkFontID fontID = CTFontRef_to_SkFontID(fontRef);
1.559 + SkTypeface* face = SkTypefaceCache::FindByID(fontID);
1.560 + if (face) {
1.561 + face->ref();
1.562 + } else {
1.563 + face = NewFromFontRef(fontRef, NULL);
1.564 + SkTypefaceCache::Add(face, face->style());
1.565 + // NewFromFontRef doesn't retain the parameter, but the typeface it
1.566 + // creates does release it in its destructor, so we balance that with
1.567 + // a retain call here.
1.568 + CFRetain(fontRef);
1.569 + }
1.570 + SkASSERT(face->getRefCnt() > 1);
1.571 + return face;
1.572 +}
1.573 +
1.574 +struct NameStyleRec {
1.575 + const char* fName;
1.576 + SkTypeface::Style fStyle;
1.577 +};
1.578 +
1.579 +static bool FindByNameStyle(SkTypeface* face, SkTypeface::Style style,
1.580 + void* ctx) {
1.581 + const SkTypeface_Mac* mface = reinterpret_cast<SkTypeface_Mac*>(face);
1.582 + const NameStyleRec* rec = reinterpret_cast<const NameStyleRec*>(ctx);
1.583 +
1.584 + return rec->fStyle == style && mface->fName.equals(rec->fName);
1.585 +}
1.586 +
1.587 +static const char* map_css_names(const char* name) {
1.588 + static const struct {
1.589 + const char* fFrom; // name the caller specified
1.590 + const char* fTo; // "canonical" name we map to
1.591 + } gPairs[] = {
1.592 + { "sans-serif", "Helvetica" },
1.593 + { "serif", "Times" },
1.594 + { "monospace", "Courier" }
1.595 + };
1.596 +
1.597 + for (size_t i = 0; i < SK_ARRAY_COUNT(gPairs); i++) {
1.598 + if (strcmp(name, gPairs[i].fFrom) == 0) {
1.599 + return gPairs[i].fTo;
1.600 + }
1.601 + }
1.602 + return name; // no change
1.603 +}
1.604 +
1.605 +static SkTypeface* create_typeface(const SkTypeface* familyFace,
1.606 + const char familyName[],
1.607 + SkTypeface::Style style) {
1.608 + if (familyName) {
1.609 + familyName = map_css_names(familyName);
1.610 + }
1.611 +
1.612 + // Clone an existing typeface
1.613 + // TODO: only clone if style matches the familyFace's style...
1.614 + if (familyName == NULL && familyFace != NULL) {
1.615 + familyFace->ref();
1.616 + return const_cast<SkTypeface*>(familyFace);
1.617 + }
1.618 +
1.619 + if (!familyName || !*familyName) {
1.620 + familyName = FONT_DEFAULT_NAME;
1.621 + }
1.622 +
1.623 + NameStyleRec rec = { familyName, style };
1.624 + SkTypeface* face = SkTypefaceCache::FindByProcAndRef(FindByNameStyle, &rec);
1.625 +
1.626 + if (NULL == face) {
1.627 + face = NewFromName(familyName, style);
1.628 + if (face) {
1.629 + SkTypefaceCache::Add(face, style);
1.630 + } else {
1.631 + face = GetDefaultFace();
1.632 + face->ref();
1.633 + }
1.634 + }
1.635 + return face;
1.636 +}
1.637 +
1.638 +///////////////////////////////////////////////////////////////////////////////
1.639 +
1.640 +/** GlyphRect is in FUnits (em space, y up). */
1.641 +struct GlyphRect {
1.642 + int16_t fMinX;
1.643 + int16_t fMinY;
1.644 + int16_t fMaxX;
1.645 + int16_t fMaxY;
1.646 +};
1.647 +
1.648 +class SkScalerContext_Mac : public SkScalerContext {
1.649 +public:
1.650 + SkScalerContext_Mac(SkTypeface_Mac*, const SkDescriptor*);
1.651 +
1.652 +protected:
1.653 + unsigned generateGlyphCount(void) SK_OVERRIDE;
1.654 + uint16_t generateCharToGlyph(SkUnichar uni) SK_OVERRIDE;
1.655 + void generateAdvance(SkGlyph* glyph) SK_OVERRIDE;
1.656 + void generateMetrics(SkGlyph* glyph) SK_OVERRIDE;
1.657 + void generateImage(const SkGlyph& glyph) SK_OVERRIDE;
1.658 + void generatePath(const SkGlyph& glyph, SkPath* path) SK_OVERRIDE;
1.659 + void generateFontMetrics(SkPaint::FontMetrics* mX, SkPaint::FontMetrics* mY) SK_OVERRIDE;
1.660 +
1.661 +private:
1.662 + static void CTPathElement(void *info, const CGPathElement *element);
1.663 +
1.664 + /** Returns the offset from the horizontal origin to the vertical origin in SkGlyph units. */
1.665 + void getVerticalOffset(CGGlyph glyphID, SkPoint* offset) const;
1.666 +
1.667 + /** Initializes and returns the value of fFBoundingBoxesGlyphOffset.
1.668 + *
1.669 + * For use with (and must be called before) generateBBoxes.
1.670 + */
1.671 + uint16_t getFBoundingBoxesGlyphOffset();
1.672 +
1.673 + /** Initializes fFBoundingBoxes and returns true on success.
1.674 + *
1.675 + * On Lion and Mountain Lion, CTFontGetBoundingRectsForGlyphs has a bug which causes it to
1.676 + * return a bad value in bounds.origin.x for SFNT fonts whose hhea::numberOfHMetrics is
1.677 + * less than its maxp::numGlyphs. When this is the case we try to read the bounds from the
1.678 + * font directly.
1.679 + *
1.680 + * This routine initializes fFBoundingBoxes to an array of
1.681 + * fGlyphCount - fFBoundingBoxesGlyphOffset GlyphRects which contain the bounds in FUnits
1.682 + * (em space, y up) of glyphs with ids in the range [fFBoundingBoxesGlyphOffset, fGlyphCount).
1.683 + *
1.684 + * Returns true if fFBoundingBoxes is properly initialized. The table can only be properly
1.685 + * initialized for a TrueType font with 'head', 'loca', and 'glyf' tables.
1.686 + *
1.687 + * TODO: A future optimization will compute fFBoundingBoxes once per fCTFont.
1.688 + */
1.689 + bool generateBBoxes();
1.690 +
1.691 + /** Converts from FUnits (em space, y up) to SkGlyph units (pixels, y down).
1.692 + *
1.693 + * Used on Snow Leopard to correct CTFontGetVerticalTranslationsForGlyphs.
1.694 + * Used on Lion to correct CTFontGetBoundingRectsForGlyphs.
1.695 + */
1.696 + SkMatrix fFUnitMatrix;
1.697 +
1.698 + Offscreen fOffscreen;
1.699 + AutoCFRelease<CTFontRef> fCTFont;
1.700 +
1.701 + /** Vertical variant of fCTFont.
1.702 + *
1.703 + * CT vertical metrics are pre-rotated (in em space, before transform) 90deg clock-wise.
1.704 + * This makes kCTFontDefaultOrientation dangerous, because the metrics from
1.705 + * kCTFontHorizontalOrientation are in a different space from kCTFontVerticalOrientation.
1.706 + * Use fCTVerticalFont with kCTFontVerticalOrientation to get metrics in the same space.
1.707 + */
1.708 + AutoCFRelease<CTFontRef> fCTVerticalFont;
1.709 +
1.710 + AutoCFRelease<CGFontRef> fCGFont;
1.711 + SkAutoTMalloc<GlyphRect> fFBoundingBoxes;
1.712 + uint16_t fFBoundingBoxesGlyphOffset;
1.713 + uint16_t fGlyphCount;
1.714 + bool fGeneratedFBoundingBoxes;
1.715 + const bool fDoSubPosition;
1.716 + const bool fVertical;
1.717 +
1.718 + friend class Offscreen;
1.719 +
1.720 + typedef SkScalerContext INHERITED;
1.721 +};
1.722 +
1.723 +SkScalerContext_Mac::SkScalerContext_Mac(SkTypeface_Mac* typeface,
1.724 + const SkDescriptor* desc)
1.725 + : INHERITED(typeface, desc)
1.726 + , fFBoundingBoxes()
1.727 + , fFBoundingBoxesGlyphOffset(0)
1.728 + , fGeneratedFBoundingBoxes(false)
1.729 + , fDoSubPosition(SkToBool(fRec.fFlags & kSubpixelPositioning_Flag))
1.730 + , fVertical(SkToBool(fRec.fFlags & kVertical_Flag))
1.731 +
1.732 +{
1.733 + CTFontRef ctFont = typeface->fFontRef.get();
1.734 + CFIndex numGlyphs = CTFontGetGlyphCount(ctFont);
1.735 + SkASSERT(numGlyphs >= 1 && numGlyphs <= 0xFFFF);
1.736 + fGlyphCount = SkToU16(numGlyphs);
1.737 +
1.738 + fRec.getSingleMatrix(&fFUnitMatrix);
1.739 + CGAffineTransform transform = MatrixToCGAffineTransform(fFUnitMatrix);
1.740 +
1.741 + AutoCFRelease<CTFontDescriptorRef> ctFontDesc;
1.742 + if (fVertical) {
1.743 + AutoCFRelease<CFMutableDictionaryRef> cfAttributes(CFDictionaryCreateMutable(
1.744 + kCFAllocatorDefault, 0,
1.745 + &kCFTypeDictionaryKeyCallBacks,
1.746 + &kCFTypeDictionaryValueCallBacks));
1.747 + if (cfAttributes) {
1.748 + CTFontOrientation ctOrientation = kCTFontVerticalOrientation;
1.749 + AutoCFRelease<CFNumberRef> cfVertical(CFNumberCreate(
1.750 + kCFAllocatorDefault, kCFNumberSInt32Type, &ctOrientation));
1.751 + CFDictionaryAddValue(cfAttributes, kCTFontOrientationAttribute, cfVertical);
1.752 + ctFontDesc = CTFontDescriptorCreateWithAttributes(cfAttributes);
1.753 + }
1.754 + }
1.755 + // Since our matrix includes everything, we pass 1 for size.
1.756 + fCTFont = CTFontCreateCopyWithAttributes(ctFont, 1, &transform, ctFontDesc);
1.757 + fCGFont = CTFontCopyGraphicsFont(fCTFont, NULL);
1.758 + if (fVertical) {
1.759 + CGAffineTransform rotateLeft = CGAffineTransformMake(0, -1, 1, 0, 0, 0);
1.760 + transform = CGAffineTransformConcat(rotateLeft, transform);
1.761 + fCTVerticalFont = CTFontCreateCopyWithAttributes(ctFont, 1, &transform, NULL);
1.762 + }
1.763 +
1.764 + SkScalar emPerFUnit = SkScalarInvert(SkIntToScalar(CGFontGetUnitsPerEm(fCGFont)));
1.765 + fFUnitMatrix.preScale(emPerFUnit, -emPerFUnit);
1.766 +}
1.767 +
1.768 +CGRGBPixel* Offscreen::getCG(const SkScalerContext_Mac& context, const SkGlyph& glyph,
1.769 + CGGlyph glyphID, size_t* rowBytesPtr,
1.770 + bool generateA8FromLCD) {
1.771 + if (!fRGBSpace) {
1.772 + //It doesn't appear to matter what color space is specified.
1.773 + //Regular blends and antialiased text are always (s*a + d*(1-a))
1.774 + //and smoothed text is always g=2.0.
1.775 + fRGBSpace = CGColorSpaceCreateDeviceRGB();
1.776 + }
1.777 +
1.778 + // default to kBW_Format
1.779 + bool doAA = false;
1.780 + bool doLCD = false;
1.781 +
1.782 + if (SkMask::kBW_Format != glyph.fMaskFormat) {
1.783 + doLCD = true;
1.784 + doAA = true;
1.785 + }
1.786 +
1.787 + // FIXME: lcd smoothed un-hinted rasterization unsupported.
1.788 + if (!generateA8FromLCD && SkMask::kA8_Format == glyph.fMaskFormat) {
1.789 + doLCD = false;
1.790 + doAA = true;
1.791 + }
1.792 +
1.793 + size_t rowBytes = fSize.fWidth * sizeof(CGRGBPixel);
1.794 + if (!fCG || fSize.fWidth < glyph.fWidth || fSize.fHeight < glyph.fHeight) {
1.795 + if (fSize.fWidth < glyph.fWidth) {
1.796 + fSize.fWidth = RoundSize(glyph.fWidth);
1.797 + }
1.798 + if (fSize.fHeight < glyph.fHeight) {
1.799 + fSize.fHeight = RoundSize(glyph.fHeight);
1.800 + }
1.801 +
1.802 + rowBytes = fSize.fWidth * sizeof(CGRGBPixel);
1.803 + void* image = fImageStorage.reset(rowBytes * fSize.fHeight);
1.804 + fCG = CGBitmapContextCreate(image, fSize.fWidth, fSize.fHeight, 8,
1.805 + rowBytes, fRGBSpace, BITMAP_INFO_RGB);
1.806 +
1.807 + // skia handles quantization itself, so we disable this for cg to get
1.808 + // full fractional data from them.
1.809 + CGContextSetAllowsFontSubpixelQuantization(fCG, false);
1.810 + CGContextSetShouldSubpixelQuantizeFonts(fCG, false);
1.811 +
1.812 + CGContextSetTextDrawingMode(fCG, kCGTextFill);
1.813 + CGContextSetFont(fCG, context.fCGFont);
1.814 + CGContextSetFontSize(fCG, 1 /*CTFontGetSize(context.fCTFont)*/);
1.815 + CGContextSetTextMatrix(fCG, CTFontGetMatrix(context.fCTFont));
1.816 +
1.817 + // Because CG always draws from the horizontal baseline,
1.818 + // if there is a non-integral translation from the horizontal origin to the vertical origin,
1.819 + // then CG cannot draw the glyph in the correct location without subpixel positioning.
1.820 + CGContextSetAllowsFontSubpixelPositioning(fCG, context.fDoSubPosition || context.fVertical);
1.821 + CGContextSetShouldSubpixelPositionFonts(fCG, context.fDoSubPosition || context.fVertical);
1.822 +
1.823 + // Draw white on black to create mask.
1.824 + // TODO: Draw black on white and invert, CG has a special case codepath.
1.825 + CGContextSetGrayFillColor(fCG, 1.0f, 1.0f);
1.826 +
1.827 + // force our checks below to happen
1.828 + fDoAA = !doAA;
1.829 + fDoLCD = !doLCD;
1.830 + }
1.831 +
1.832 + if (fDoAA != doAA) {
1.833 + CGContextSetShouldAntialias(fCG, doAA);
1.834 + fDoAA = doAA;
1.835 + }
1.836 + if (fDoLCD != doLCD) {
1.837 + CGContextSetShouldSmoothFonts(fCG, doLCD);
1.838 + fDoLCD = doLCD;
1.839 + }
1.840 +
1.841 + CGRGBPixel* image = (CGRGBPixel*)fImageStorage.get();
1.842 + // skip rows based on the glyph's height
1.843 + image += (fSize.fHeight - glyph.fHeight) * fSize.fWidth;
1.844 +
1.845 + // erase to black
1.846 + sk_memset_rect32(image, 0, glyph.fWidth, glyph.fHeight, rowBytes);
1.847 +
1.848 + float subX = 0;
1.849 + float subY = 0;
1.850 + if (context.fDoSubPosition) {
1.851 + subX = SkFixedToFloat(glyph.getSubXFixed());
1.852 + subY = SkFixedToFloat(glyph.getSubYFixed());
1.853 + }
1.854 +
1.855 + // CGContextShowGlyphsAtPoint always draws using the horizontal baseline origin.
1.856 + if (context.fVertical) {
1.857 + SkPoint offset;
1.858 + context.getVerticalOffset(glyphID, &offset);
1.859 + subX += offset.fX;
1.860 + subY += offset.fY;
1.861 + }
1.862 +
1.863 + CGContextShowGlyphsAtPoint(fCG, -glyph.fLeft + subX,
1.864 + glyph.fTop + glyph.fHeight - subY,
1.865 + &glyphID, 1);
1.866 +
1.867 + SkASSERT(rowBytesPtr);
1.868 + *rowBytesPtr = rowBytes;
1.869 + return image;
1.870 +}
1.871 +
1.872 +void SkScalerContext_Mac::getVerticalOffset(CGGlyph glyphID, SkPoint* offset) const {
1.873 + // Snow Leopard returns cgVertOffset in completely un-transformed FUnits (em space, y up).
1.874 + // Lion and Leopard return cgVertOffset in CG units (pixels, y up).
1.875 + CGSize cgVertOffset;
1.876 + CTFontGetVerticalTranslationsForGlyphs(fCTFont, &glyphID, &cgVertOffset, 1);
1.877 +
1.878 + SkPoint skVertOffset = { CGToScalar(cgVertOffset.width), CGToScalar(cgVertOffset.height) };
1.879 + if (isSnowLeopard()) {
1.880 + // From FUnits (em space, y up) to SkGlyph units (pixels, y down).
1.881 + fFUnitMatrix.mapPoints(&skVertOffset, 1);
1.882 + } else {
1.883 + // From CG units (pixels, y up) to SkGlyph units (pixels, y down).
1.884 + skVertOffset.fY = -skVertOffset.fY;
1.885 + }
1.886 +
1.887 + *offset = skVertOffset;
1.888 +}
1.889 +
1.890 +uint16_t SkScalerContext_Mac::getFBoundingBoxesGlyphOffset() {
1.891 + if (fFBoundingBoxesGlyphOffset) {
1.892 + return fFBoundingBoxesGlyphOffset;
1.893 + }
1.894 + fFBoundingBoxesGlyphOffset = fGlyphCount; // fallback for all fonts
1.895 + AutoCGTable<SkOTTableHorizontalHeader> hheaTable(fCGFont);
1.896 + if (hheaTable.fData) {
1.897 + fFBoundingBoxesGlyphOffset = SkEndian_SwapBE16(hheaTable->numberOfHMetrics);
1.898 + }
1.899 + return fFBoundingBoxesGlyphOffset;
1.900 +}
1.901 +
1.902 +bool SkScalerContext_Mac::generateBBoxes() {
1.903 + if (fGeneratedFBoundingBoxes) {
1.904 + return NULL != fFBoundingBoxes.get();
1.905 + }
1.906 + fGeneratedFBoundingBoxes = true;
1.907 +
1.908 + AutoCGTable<SkOTTableHead> headTable(fCGFont);
1.909 + if (!headTable.fData) {
1.910 + return false;
1.911 + }
1.912 +
1.913 + AutoCGTable<SkOTTableIndexToLocation> locaTable(fCGFont);
1.914 + if (!locaTable.fData) {
1.915 + return false;
1.916 + }
1.917 +
1.918 + AutoCGTable<SkOTTableGlyph> glyfTable(fCGFont);
1.919 + if (!glyfTable.fData) {
1.920 + return false;
1.921 + }
1.922 +
1.923 + uint16_t entries = fGlyphCount - fFBoundingBoxesGlyphOffset;
1.924 + fFBoundingBoxes.reset(entries);
1.925 +
1.926 + SkOTTableHead::IndexToLocFormat locaFormat = headTable->indexToLocFormat;
1.927 + SkOTTableGlyph::Iterator glyphDataIter(*glyfTable.fData, *locaTable.fData, locaFormat);
1.928 + glyphDataIter.advance(fFBoundingBoxesGlyphOffset);
1.929 + for (uint16_t boundingBoxesIndex = 0; boundingBoxesIndex < entries; ++boundingBoxesIndex) {
1.930 + const SkOTTableGlyphData* glyphData = glyphDataIter.next();
1.931 + GlyphRect& rect = fFBoundingBoxes[boundingBoxesIndex];
1.932 + rect.fMinX = SkEndian_SwapBE16(glyphData->xMin);
1.933 + rect.fMinY = SkEndian_SwapBE16(glyphData->yMin);
1.934 + rect.fMaxX = SkEndian_SwapBE16(glyphData->xMax);
1.935 + rect.fMaxY = SkEndian_SwapBE16(glyphData->yMax);
1.936 + }
1.937 +
1.938 + return true;
1.939 +}
1.940 +
1.941 +unsigned SkScalerContext_Mac::generateGlyphCount(void) {
1.942 + return fGlyphCount;
1.943 +}
1.944 +
1.945 +uint16_t SkScalerContext_Mac::generateCharToGlyph(SkUnichar uni) {
1.946 + CGGlyph cgGlyph[2];
1.947 + UniChar theChar[2]; // UniChar is a UTF-16 16-bit code unit.
1.948 +
1.949 + // Get the glyph
1.950 + size_t numUniChar = SkUTF16_FromUnichar(uni, theChar);
1.951 + SkASSERT(sizeof(CGGlyph) <= sizeof(uint16_t));
1.952 +
1.953 + // Undocumented behavior of CTFontGetGlyphsForCharacters with non-bmp code points:
1.954 + // When a surrogate pair is detected, the glyph index used is the index of the high surrogate.
1.955 + // It is documented that if a mapping is unavailable, the glyph will be set to 0.
1.956 + CTFontGetGlyphsForCharacters(fCTFont, theChar, cgGlyph, numUniChar);
1.957 + return cgGlyph[0];
1.958 +}
1.959 +
1.960 +void SkScalerContext_Mac::generateAdvance(SkGlyph* glyph) {
1.961 + this->generateMetrics(glyph);
1.962 +}
1.963 +
1.964 +void SkScalerContext_Mac::generateMetrics(SkGlyph* glyph) {
1.965 + const CGGlyph cgGlyph = (CGGlyph) glyph->getGlyphID(fBaseGlyphCount);
1.966 + glyph->zeroMetrics();
1.967 +
1.968 + // The following block produces cgAdvance in CG units (pixels, y up).
1.969 + CGSize cgAdvance;
1.970 + if (fVertical) {
1.971 + CTFontGetAdvancesForGlyphs(fCTVerticalFont, kCTFontVerticalOrientation,
1.972 + &cgGlyph, &cgAdvance, 1);
1.973 + } else {
1.974 + CTFontGetAdvancesForGlyphs(fCTFont, kCTFontHorizontalOrientation,
1.975 + &cgGlyph, &cgAdvance, 1);
1.976 + }
1.977 + glyph->fAdvanceX = SkFloatToFixed_Check(cgAdvance.width);
1.978 + glyph->fAdvanceY = -SkFloatToFixed_Check(cgAdvance.height);
1.979 +
1.980 + // The following produces skBounds in SkGlyph units (pixels, y down),
1.981 + // or returns early if skBounds would be empty.
1.982 + SkRect skBounds;
1.983 +
1.984 + // On Mountain Lion, CTFontGetBoundingRectsForGlyphs with kCTFontVerticalOrientation and
1.985 + // CTFontGetVerticalTranslationsForGlyphs do not agree when using OTF CFF fonts.
1.986 + // For TTF fonts these two do agree and we can use CTFontGetBoundingRectsForGlyphs to get
1.987 + // the bounding box and CTFontGetVerticalTranslationsForGlyphs to then draw the glyph
1.988 + // inside that bounding box. However, with OTF CFF fonts this does not work. It appears that
1.989 + // CTFontGetBoundingRectsForGlyphs with kCTFontVerticalOrientation on OTF CFF fonts tries
1.990 + // to center the glyph along the vertical baseline and also perform some mysterious shift
1.991 + // along the baseline. CTFontGetVerticalTranslationsForGlyphs does not appear to perform
1.992 + // these steps.
1.993 + //
1.994 + // It is not known which is correct (or if either is correct). However, we must always draw
1.995 + // from the horizontal origin and must use CTFontGetVerticalTranslationsForGlyphs to draw.
1.996 + // As a result, we do not call CTFontGetBoundingRectsForGlyphs for vertical glyphs.
1.997 +
1.998 + // On Snow Leopard, CTFontGetBoundingRectsForGlyphs ignores kCTFontVerticalOrientation and
1.999 + // returns horizontal bounds.
1.1000 +
1.1001 + // On Lion and Mountain Lion, CTFontGetBoundingRectsForGlyphs has a bug which causes it to
1.1002 + // return a bad value in cgBounds.origin.x for SFNT fonts whose hhea::numberOfHMetrics is
1.1003 + // less than its maxp::numGlyphs. When this is the case we try to read the bounds from the
1.1004 + // font directly.
1.1005 + if ((isLion() || isMountainLion()) &&
1.1006 + (cgGlyph < fGlyphCount && cgGlyph >= getFBoundingBoxesGlyphOffset() && generateBBoxes()))
1.1007 + {
1.1008 + const GlyphRect& gRect = fFBoundingBoxes[cgGlyph - fFBoundingBoxesGlyphOffset];
1.1009 + if (gRect.fMinX >= gRect.fMaxX || gRect.fMinY >= gRect.fMaxY) {
1.1010 + return;
1.1011 + }
1.1012 + skBounds = SkRect::MakeLTRB(gRect.fMinX, gRect.fMinY, gRect.fMaxX, gRect.fMaxY);
1.1013 + // From FUnits (em space, y up) to SkGlyph units (pixels, y down).
1.1014 + fFUnitMatrix.mapRect(&skBounds);
1.1015 +
1.1016 + } else {
1.1017 + // CTFontGetBoundingRectsForGlyphs produces cgBounds in CG units (pixels, y up).
1.1018 + CGRect cgBounds;
1.1019 + CTFontGetBoundingRectsForGlyphs(fCTFont, kCTFontHorizontalOrientation,
1.1020 + &cgGlyph, &cgBounds, 1);
1.1021 +
1.1022 + // BUG?
1.1023 + // 0x200B (zero-advance space) seems to return a huge (garbage) bounds, when
1.1024 + // it should be empty. So, if we see a zero-advance, we check if it has an
1.1025 + // empty path or not, and if so, we jam the bounds to 0. Hopefully a zero-advance
1.1026 + // is rare, so we won't incur a big performance cost for this extra check.
1.1027 + if (0 == cgAdvance.width && 0 == cgAdvance.height) {
1.1028 + AutoCFRelease<CGPathRef> path(CTFontCreatePathForGlyph(fCTFont, cgGlyph, NULL));
1.1029 + if (NULL == path || CGPathIsEmpty(path)) {
1.1030 + return;
1.1031 + }
1.1032 + }
1.1033 +
1.1034 + if (CGRectIsEmpty_inline(cgBounds)) {
1.1035 + return;
1.1036 + }
1.1037 +
1.1038 + // Convert cgBounds to SkGlyph units (pixels, y down).
1.1039 + skBounds = SkRect::MakeXYWH(cgBounds.origin.x, -cgBounds.origin.y - cgBounds.size.height,
1.1040 + cgBounds.size.width, cgBounds.size.height);
1.1041 + }
1.1042 +
1.1043 + if (fVertical) {
1.1044 + // Due to all of the vertical bounds bugs, skBounds is always the horizontal bounds.
1.1045 + // Convert these horizontal bounds into vertical bounds.
1.1046 + SkPoint offset;
1.1047 + getVerticalOffset(cgGlyph, &offset);
1.1048 + skBounds.offset(offset);
1.1049 + }
1.1050 +
1.1051 + // Currently the bounds are based on being rendered at (0,0).
1.1052 + // The top left must not move, since that is the base from which subpixel positioning is offset.
1.1053 + if (fDoSubPosition) {
1.1054 + skBounds.fRight += SkFixedToFloat(glyph->getSubXFixed());
1.1055 + skBounds.fBottom += SkFixedToFloat(glyph->getSubYFixed());
1.1056 + }
1.1057 +
1.1058 + SkIRect skIBounds;
1.1059 + skBounds.roundOut(&skIBounds);
1.1060 + // Expand the bounds by 1 pixel, to give CG room for anti-aliasing.
1.1061 + // Note that this outset is to allow room for LCD smoothed glyphs. However, the correct outset
1.1062 + // is not currently known, as CG dilates the outlines by some percentage.
1.1063 + // Note that if this context is A8 and not back-forming from LCD, there is no need to outset.
1.1064 + skIBounds.outset(1, 1);
1.1065 + glyph->fLeft = SkToS16(skIBounds.fLeft);
1.1066 + glyph->fTop = SkToS16(skIBounds.fTop);
1.1067 + glyph->fWidth = SkToU16(skIBounds.width());
1.1068 + glyph->fHeight = SkToU16(skIBounds.height());
1.1069 +
1.1070 +#ifdef HACK_COLORGLYPHS
1.1071 + glyph->fMaskFormat = SkMask::kARGB32_Format;
1.1072 +#endif
1.1073 +}
1.1074 +
1.1075 +#include "SkColorPriv.h"
1.1076 +
1.1077 +static void build_power_table(uint8_t table[], float ee) {
1.1078 + for (int i = 0; i < 256; i++) {
1.1079 + float x = i / 255.f;
1.1080 + x = sk_float_pow(x, ee);
1.1081 + int xx = SkScalarRoundToInt(x * 255);
1.1082 + table[i] = SkToU8(xx);
1.1083 + }
1.1084 +}
1.1085 +
1.1086 +/**
1.1087 + * This will invert the gamma applied by CoreGraphics, so we can get linear
1.1088 + * values.
1.1089 + *
1.1090 + * CoreGraphics obscurely defaults to 2.0 as the smoothing gamma value.
1.1091 + * The color space used does not appear to affect this choice.
1.1092 + */
1.1093 +static const uint8_t* getInverseGammaTableCoreGraphicSmoothing() {
1.1094 + static bool gInited;
1.1095 + static uint8_t gTableCoreGraphicsSmoothing[256];
1.1096 + if (!gInited) {
1.1097 + build_power_table(gTableCoreGraphicsSmoothing, 2.0f);
1.1098 + gInited = true;
1.1099 + }
1.1100 + return gTableCoreGraphicsSmoothing;
1.1101 +}
1.1102 +
1.1103 +static void cgpixels_to_bits(uint8_t dst[], const CGRGBPixel src[], int count) {
1.1104 + while (count > 0) {
1.1105 + uint8_t mask = 0;
1.1106 + for (int i = 7; i >= 0; --i) {
1.1107 + mask |= (CGRGBPixel_getAlpha(*src++) >> 7) << i;
1.1108 + if (0 == --count) {
1.1109 + break;
1.1110 + }
1.1111 + }
1.1112 + *dst++ = mask;
1.1113 + }
1.1114 +}
1.1115 +
1.1116 +template<bool APPLY_PREBLEND>
1.1117 +static inline uint8_t rgb_to_a8(CGRGBPixel rgb, const uint8_t* table8) {
1.1118 + U8CPU r = (rgb >> 16) & 0xFF;
1.1119 + U8CPU g = (rgb >> 8) & 0xFF;
1.1120 + U8CPU b = (rgb >> 0) & 0xFF;
1.1121 + return sk_apply_lut_if<APPLY_PREBLEND>(SkComputeLuminance(r, g, b), table8);
1.1122 +}
1.1123 +template<bool APPLY_PREBLEND>
1.1124 +static void rgb_to_a8(const CGRGBPixel* SK_RESTRICT cgPixels, size_t cgRowBytes,
1.1125 + const SkGlyph& glyph, const uint8_t* table8) {
1.1126 + const int width = glyph.fWidth;
1.1127 + size_t dstRB = glyph.rowBytes();
1.1128 + uint8_t* SK_RESTRICT dst = (uint8_t*)glyph.fImage;
1.1129 +
1.1130 + for (int y = 0; y < glyph.fHeight; y++) {
1.1131 + for (int i = 0; i < width; ++i) {
1.1132 + dst[i] = rgb_to_a8<APPLY_PREBLEND>(cgPixels[i], table8);
1.1133 + }
1.1134 + cgPixels = (CGRGBPixel*)((char*)cgPixels + cgRowBytes);
1.1135 + dst += dstRB;
1.1136 + }
1.1137 +}
1.1138 +
1.1139 +template<bool APPLY_PREBLEND>
1.1140 +static inline uint16_t rgb_to_lcd16(CGRGBPixel rgb, const uint8_t* tableR,
1.1141 + const uint8_t* tableG,
1.1142 + const uint8_t* tableB) {
1.1143 + U8CPU r = sk_apply_lut_if<APPLY_PREBLEND>((rgb >> 16) & 0xFF, tableR);
1.1144 + U8CPU g = sk_apply_lut_if<APPLY_PREBLEND>((rgb >> 8) & 0xFF, tableG);
1.1145 + U8CPU b = sk_apply_lut_if<APPLY_PREBLEND>((rgb >> 0) & 0xFF, tableB);
1.1146 + return SkPack888ToRGB16(r, g, b);
1.1147 +}
1.1148 +template<bool APPLY_PREBLEND>
1.1149 +static void rgb_to_lcd16(const CGRGBPixel* SK_RESTRICT cgPixels, size_t cgRowBytes, const SkGlyph& glyph,
1.1150 + const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB) {
1.1151 + const int width = glyph.fWidth;
1.1152 + size_t dstRB = glyph.rowBytes();
1.1153 + uint16_t* SK_RESTRICT dst = (uint16_t*)glyph.fImage;
1.1154 +
1.1155 + for (int y = 0; y < glyph.fHeight; y++) {
1.1156 + for (int i = 0; i < width; i++) {
1.1157 + dst[i] = rgb_to_lcd16<APPLY_PREBLEND>(cgPixels[i], tableR, tableG, tableB);
1.1158 + }
1.1159 + cgPixels = (CGRGBPixel*)((char*)cgPixels + cgRowBytes);
1.1160 + dst = (uint16_t*)((char*)dst + dstRB);
1.1161 + }
1.1162 +}
1.1163 +
1.1164 +template<bool APPLY_PREBLEND>
1.1165 +static inline uint32_t rgb_to_lcd32(CGRGBPixel rgb, const uint8_t* tableR,
1.1166 + const uint8_t* tableG,
1.1167 + const uint8_t* tableB) {
1.1168 + U8CPU r = sk_apply_lut_if<APPLY_PREBLEND>((rgb >> 16) & 0xFF, tableR);
1.1169 + U8CPU g = sk_apply_lut_if<APPLY_PREBLEND>((rgb >> 8) & 0xFF, tableG);
1.1170 + U8CPU b = sk_apply_lut_if<APPLY_PREBLEND>((rgb >> 0) & 0xFF, tableB);
1.1171 + return SkPackARGB32(0xFF, r, g, b);
1.1172 +}
1.1173 +template<bool APPLY_PREBLEND>
1.1174 +static void rgb_to_lcd32(const CGRGBPixel* SK_RESTRICT cgPixels, size_t cgRowBytes, const SkGlyph& glyph,
1.1175 + const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB) {
1.1176 + const int width = glyph.fWidth;
1.1177 + size_t dstRB = glyph.rowBytes();
1.1178 + uint32_t* SK_RESTRICT dst = (uint32_t*)glyph.fImage;
1.1179 + for (int y = 0; y < glyph.fHeight; y++) {
1.1180 + for (int i = 0; i < width; i++) {
1.1181 + dst[i] = rgb_to_lcd32<APPLY_PREBLEND>(cgPixels[i], tableR, tableG, tableB);
1.1182 + }
1.1183 + cgPixels = (CGRGBPixel*)((char*)cgPixels + cgRowBytes);
1.1184 + dst = (uint32_t*)((char*)dst + dstRB);
1.1185 + }
1.1186 +}
1.1187 +
1.1188 +#ifdef HACK_COLORGLYPHS
1.1189 +// hack to colorize the output for testing kARGB32_Format
1.1190 +static SkPMColor cgpixels_to_pmcolor(CGRGBPixel rgb, const SkGlyph& glyph,
1.1191 + int x, int y) {
1.1192 + U8CPU r = (rgb >> 16) & 0xFF;
1.1193 + U8CPU g = (rgb >> 8) & 0xFF;
1.1194 + U8CPU b = (rgb >> 0) & 0xFF;
1.1195 + unsigned a = SkComputeLuminance(r, g, b);
1.1196 +
1.1197 + // compute gradient from x,y
1.1198 + r = x * 255 / glyph.fWidth;
1.1199 + g = 0;
1.1200 + b = (glyph.fHeight - y) * 255 / glyph.fHeight;
1.1201 + return SkPreMultiplyARGB(a, r, g, b); // red
1.1202 +}
1.1203 +#endif
1.1204 +
1.1205 +template <typename T> T* SkTAddByteOffset(T* ptr, size_t byteOffset) {
1.1206 + return (T*)((char*)ptr + byteOffset);
1.1207 +}
1.1208 +
1.1209 +void SkScalerContext_Mac::generateImage(const SkGlyph& glyph) {
1.1210 + CGGlyph cgGlyph = (CGGlyph) glyph.getGlyphID(fBaseGlyphCount);
1.1211 +
1.1212 + // FIXME: lcd smoothed un-hinted rasterization unsupported.
1.1213 + bool generateA8FromLCD = fRec.getHinting() != SkPaint::kNo_Hinting;
1.1214 +
1.1215 + // Draw the glyph
1.1216 + size_t cgRowBytes;
1.1217 + CGRGBPixel* cgPixels = fOffscreen.getCG(*this, glyph, cgGlyph, &cgRowBytes, generateA8FromLCD);
1.1218 + if (cgPixels == NULL) {
1.1219 + return;
1.1220 + }
1.1221 +
1.1222 + //TODO: see if drawing black on white and inverting is faster (at least in
1.1223 + //lcd case) as core graphics appears to have special case code for drawing
1.1224 + //black text.
1.1225 +
1.1226 + // Fix the glyph
1.1227 + const bool isLCD = isLCDFormat(glyph.fMaskFormat);
1.1228 + if (isLCD || (glyph.fMaskFormat == SkMask::kA8_Format && supports_LCD() && generateA8FromLCD)) {
1.1229 + const uint8_t* table = getInverseGammaTableCoreGraphicSmoothing();
1.1230 +
1.1231 + //Note that the following cannot really be integrated into the
1.1232 + //pre-blend, since we may not be applying the pre-blend; when we aren't
1.1233 + //applying the pre-blend it means that a filter wants linear anyway.
1.1234 + //Other code may also be applying the pre-blend, so we'd need another
1.1235 + //one with this and one without.
1.1236 + CGRGBPixel* addr = cgPixels;
1.1237 + for (int y = 0; y < glyph.fHeight; ++y) {
1.1238 + for (int x = 0; x < glyph.fWidth; ++x) {
1.1239 + int r = (addr[x] >> 16) & 0xFF;
1.1240 + int g = (addr[x] >> 8) & 0xFF;
1.1241 + int b = (addr[x] >> 0) & 0xFF;
1.1242 + addr[x] = (table[r] << 16) | (table[g] << 8) | table[b];
1.1243 + }
1.1244 + addr = SkTAddByteOffset(addr, cgRowBytes);
1.1245 + }
1.1246 + }
1.1247 +
1.1248 + // Convert glyph to mask
1.1249 + switch (glyph.fMaskFormat) {
1.1250 + case SkMask::kLCD32_Format: {
1.1251 + if (fPreBlend.isApplicable()) {
1.1252 + rgb_to_lcd32<true>(cgPixels, cgRowBytes, glyph,
1.1253 + fPreBlend.fR, fPreBlend.fG, fPreBlend.fB);
1.1254 + } else {
1.1255 + rgb_to_lcd32<false>(cgPixels, cgRowBytes, glyph,
1.1256 + fPreBlend.fR, fPreBlend.fG, fPreBlend.fB);
1.1257 + }
1.1258 + } break;
1.1259 + case SkMask::kLCD16_Format: {
1.1260 + if (fPreBlend.isApplicable()) {
1.1261 + rgb_to_lcd16<true>(cgPixels, cgRowBytes, glyph,
1.1262 + fPreBlend.fR, fPreBlend.fG, fPreBlend.fB);
1.1263 + } else {
1.1264 + rgb_to_lcd16<false>(cgPixels, cgRowBytes, glyph,
1.1265 + fPreBlend.fR, fPreBlend.fG, fPreBlend.fB);
1.1266 + }
1.1267 + } break;
1.1268 + case SkMask::kA8_Format: {
1.1269 + if (fPreBlend.isApplicable()) {
1.1270 + rgb_to_a8<true>(cgPixels, cgRowBytes, glyph, fPreBlend.fG);
1.1271 + } else {
1.1272 + rgb_to_a8<false>(cgPixels, cgRowBytes, glyph, fPreBlend.fG);
1.1273 + }
1.1274 + } break;
1.1275 + case SkMask::kBW_Format: {
1.1276 + const int width = glyph.fWidth;
1.1277 + size_t dstRB = glyph.rowBytes();
1.1278 + uint8_t* dst = (uint8_t*)glyph.fImage;
1.1279 + for (int y = 0; y < glyph.fHeight; y++) {
1.1280 + cgpixels_to_bits(dst, cgPixels, width);
1.1281 + cgPixels = (CGRGBPixel*)((char*)cgPixels + cgRowBytes);
1.1282 + dst += dstRB;
1.1283 + }
1.1284 + } break;
1.1285 +#ifdef HACK_COLORGLYPHS
1.1286 + case SkMask::kARGB32_Format: {
1.1287 + const int width = glyph.fWidth;
1.1288 + size_t dstRB = glyph.rowBytes();
1.1289 + SkPMColor* dst = (SkPMColor*)glyph.fImage;
1.1290 + for (int y = 0; y < glyph.fHeight; y++) {
1.1291 + for (int x = 0; x < width; ++x) {
1.1292 + dst[x] = cgpixels_to_pmcolor(cgPixels[x], glyph, x, y);
1.1293 + }
1.1294 + cgPixels = (CGRGBPixel*)((char*)cgPixels + cgRowBytes);
1.1295 + dst = (SkPMColor*)((char*)dst + dstRB);
1.1296 + }
1.1297 + } break;
1.1298 +#endif
1.1299 + default:
1.1300 + SkDEBUGFAIL("unexpected mask format");
1.1301 + break;
1.1302 + }
1.1303 +}
1.1304 +
1.1305 +/*
1.1306 + * Our subpixel resolution is only 2 bits in each direction, so a scale of 4
1.1307 + * seems sufficient, and possibly even correct, to allow the hinted outline
1.1308 + * to be subpixel positioned.
1.1309 + */
1.1310 +#define kScaleForSubPixelPositionHinting (4.0f)
1.1311 +
1.1312 +void SkScalerContext_Mac::generatePath(const SkGlyph& glyph, SkPath* path) {
1.1313 + CTFontRef font = fCTFont;
1.1314 + SkScalar scaleX = SK_Scalar1;
1.1315 + SkScalar scaleY = SK_Scalar1;
1.1316 +
1.1317 + /*
1.1318 + * For subpixel positioning, we want to return an unhinted outline, so it
1.1319 + * can be positioned nicely at fractional offsets. However, we special-case
1.1320 + * if the baseline of the (horizontal) text is axis-aligned. In those cases
1.1321 + * we want to retain hinting in the direction orthogonal to the baseline.
1.1322 + * e.g. for horizontal baseline, we want to retain hinting in Y.
1.1323 + * The way we remove hinting is to scale the font by some value (4) in that
1.1324 + * direction, ask for the path, and then scale the path back down.
1.1325 + */
1.1326 + if (fRec.fFlags & SkScalerContext::kSubpixelPositioning_Flag) {
1.1327 + SkMatrix m;
1.1328 + fRec.getSingleMatrix(&m);
1.1329 +
1.1330 + // start out by assuming that we want no hining in X and Y
1.1331 + scaleX = scaleY = kScaleForSubPixelPositionHinting;
1.1332 + // now see if we need to restore hinting for axis-aligned baselines
1.1333 + switch (SkComputeAxisAlignmentForHText(m)) {
1.1334 + case kX_SkAxisAlignment:
1.1335 + scaleY = SK_Scalar1; // want hinting in the Y direction
1.1336 + break;
1.1337 + case kY_SkAxisAlignment:
1.1338 + scaleX = SK_Scalar1; // want hinting in the X direction
1.1339 + break;
1.1340 + default:
1.1341 + break;
1.1342 + }
1.1343 +
1.1344 + CGAffineTransform xform = MatrixToCGAffineTransform(m, scaleX, scaleY);
1.1345 + // need to release font when we're done
1.1346 + font = CTFontCreateCopyWithAttributes(fCTFont, 1, &xform, NULL);
1.1347 + }
1.1348 +
1.1349 + CGGlyph cgGlyph = (CGGlyph)glyph.getGlyphID(fBaseGlyphCount);
1.1350 + AutoCFRelease<CGPathRef> cgPath(CTFontCreatePathForGlyph(font, cgGlyph, NULL));
1.1351 +
1.1352 + path->reset();
1.1353 + if (cgPath != NULL) {
1.1354 + CGPathApply(cgPath, path, SkScalerContext_Mac::CTPathElement);
1.1355 + }
1.1356 +
1.1357 + if (fDoSubPosition) {
1.1358 + SkMatrix m;
1.1359 + m.setScale(SkScalarInvert(scaleX), SkScalarInvert(scaleY));
1.1360 + path->transform(m);
1.1361 + // balance the call to CTFontCreateCopyWithAttributes
1.1362 + CFSafeRelease(font);
1.1363 + }
1.1364 + if (fVertical) {
1.1365 + SkPoint offset;
1.1366 + getVerticalOffset(cgGlyph, &offset);
1.1367 + path->offset(offset.fX, offset.fY);
1.1368 + }
1.1369 +}
1.1370 +
1.1371 +void SkScalerContext_Mac::generateFontMetrics(SkPaint::FontMetrics* mx,
1.1372 + SkPaint::FontMetrics* my) {
1.1373 + CGRect theBounds = CTFontGetBoundingBox(fCTFont);
1.1374 +
1.1375 + SkPaint::FontMetrics theMetrics;
1.1376 + theMetrics.fTop = CGToScalar(-CGRectGetMaxY_inline(theBounds));
1.1377 + theMetrics.fAscent = CGToScalar(-CTFontGetAscent(fCTFont));
1.1378 + theMetrics.fDescent = CGToScalar( CTFontGetDescent(fCTFont));
1.1379 + theMetrics.fBottom = CGToScalar(-CGRectGetMinY_inline(theBounds));
1.1380 + theMetrics.fLeading = CGToScalar( CTFontGetLeading(fCTFont));
1.1381 + theMetrics.fAvgCharWidth = CGToScalar( CGRectGetWidth_inline(theBounds));
1.1382 + theMetrics.fXMin = CGToScalar( CGRectGetMinX_inline(theBounds));
1.1383 + theMetrics.fXMax = CGToScalar( CGRectGetMaxX_inline(theBounds));
1.1384 + theMetrics.fXHeight = CGToScalar( CTFontGetXHeight(fCTFont));
1.1385 + theMetrics.fUnderlineThickness = CGToScalar( CTFontGetUnderlineThickness(fCTFont));
1.1386 + theMetrics.fUnderlinePosition = -CGToScalar( CTFontGetUnderlinePosition(fCTFont));
1.1387 +
1.1388 + theMetrics.fFlags |= SkPaint::FontMetrics::kUnderlineThinknessIsValid_Flag;
1.1389 + theMetrics.fFlags |= SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag;
1.1390 +
1.1391 + if (mx != NULL) {
1.1392 + *mx = theMetrics;
1.1393 + }
1.1394 + if (my != NULL) {
1.1395 + *my = theMetrics;
1.1396 + }
1.1397 +}
1.1398 +
1.1399 +void SkScalerContext_Mac::CTPathElement(void *info, const CGPathElement *element) {
1.1400 + SkPath* skPath = (SkPath*)info;
1.1401 +
1.1402 + // Process the path element
1.1403 + switch (element->type) {
1.1404 + case kCGPathElementMoveToPoint:
1.1405 + skPath->moveTo(element->points[0].x, -element->points[0].y);
1.1406 + break;
1.1407 +
1.1408 + case kCGPathElementAddLineToPoint:
1.1409 + skPath->lineTo(element->points[0].x, -element->points[0].y);
1.1410 + break;
1.1411 +
1.1412 + case kCGPathElementAddQuadCurveToPoint:
1.1413 + skPath->quadTo(element->points[0].x, -element->points[0].y,
1.1414 + element->points[1].x, -element->points[1].y);
1.1415 + break;
1.1416 +
1.1417 + case kCGPathElementAddCurveToPoint:
1.1418 + skPath->cubicTo(element->points[0].x, -element->points[0].y,
1.1419 + element->points[1].x, -element->points[1].y,
1.1420 + element->points[2].x, -element->points[2].y);
1.1421 + break;
1.1422 +
1.1423 + case kCGPathElementCloseSubpath:
1.1424 + skPath->close();
1.1425 + break;
1.1426 +
1.1427 + default:
1.1428 + SkDEBUGFAIL("Unknown path element!");
1.1429 + break;
1.1430 + }
1.1431 +}
1.1432 +
1.1433 +
1.1434 +///////////////////////////////////////////////////////////////////////////////
1.1435 +
1.1436 +// Returns NULL on failure
1.1437 +// Call must still manage its ownership of provider
1.1438 +static SkTypeface* create_from_dataProvider(CGDataProviderRef provider) {
1.1439 + AutoCFRelease<CGFontRef> cg(CGFontCreateWithDataProvider(provider));
1.1440 + if (NULL == cg) {
1.1441 + return NULL;
1.1442 + }
1.1443 + CTFontRef ct = CTFontCreateWithGraphicsFont(cg, 0, NULL, NULL);
1.1444 + return cg ? SkCreateTypefaceFromCTFont(ct) : NULL;
1.1445 +}
1.1446 +
1.1447 +// Web fonts added to the the CTFont registry do not return their character set.
1.1448 +// Iterate through the font in this case. The existing caller caches the result,
1.1449 +// so the performance impact isn't too bad.
1.1450 +static void populate_glyph_to_unicode_slow(CTFontRef ctFont, CFIndex glyphCount,
1.1451 + SkTDArray<SkUnichar>* glyphToUnicode) {
1.1452 + glyphToUnicode->setCount(SkToInt(glyphCount));
1.1453 + SkUnichar* out = glyphToUnicode->begin();
1.1454 + sk_bzero(out, glyphCount * sizeof(SkUnichar));
1.1455 + UniChar unichar = 0;
1.1456 + while (glyphCount > 0) {
1.1457 + CGGlyph glyph;
1.1458 + if (CTFontGetGlyphsForCharacters(ctFont, &unichar, &glyph, 1)) {
1.1459 + out[glyph] = unichar;
1.1460 + --glyphCount;
1.1461 + }
1.1462 + if (++unichar == 0) {
1.1463 + break;
1.1464 + }
1.1465 + }
1.1466 +}
1.1467 +
1.1468 +// Construct Glyph to Unicode table.
1.1469 +// Unicode code points that require conjugate pairs in utf16 are not
1.1470 +// supported.
1.1471 +static void populate_glyph_to_unicode(CTFontRef ctFont, CFIndex glyphCount,
1.1472 + SkTDArray<SkUnichar>* glyphToUnicode) {
1.1473 + AutoCFRelease<CFCharacterSetRef> charSet(CTFontCopyCharacterSet(ctFont));
1.1474 + if (!charSet) {
1.1475 + populate_glyph_to_unicode_slow(ctFont, glyphCount, glyphToUnicode);
1.1476 + return;
1.1477 + }
1.1478 +
1.1479 + AutoCFRelease<CFDataRef> bitmap(CFCharacterSetCreateBitmapRepresentation(kCFAllocatorDefault,
1.1480 + charSet));
1.1481 + if (!bitmap) {
1.1482 + return;
1.1483 + }
1.1484 + CFIndex length = CFDataGetLength(bitmap);
1.1485 + if (!length) {
1.1486 + return;
1.1487 + }
1.1488 + if (length > 8192) {
1.1489 + // TODO: Add support for Unicode above 0xFFFF
1.1490 + // Consider only the BMP portion of the Unicode character points.
1.1491 + // The bitmap may contain other planes, up to plane 16.
1.1492 + // See http://developer.apple.com/library/ios/#documentation/CoreFoundation/Reference/CFCharacterSetRef/Reference/reference.html
1.1493 + length = 8192;
1.1494 + }
1.1495 + const UInt8* bits = CFDataGetBytePtr(bitmap);
1.1496 + glyphToUnicode->setCount(SkToInt(glyphCount));
1.1497 + SkUnichar* out = glyphToUnicode->begin();
1.1498 + sk_bzero(out, glyphCount * sizeof(SkUnichar));
1.1499 + for (int i = 0; i < length; i++) {
1.1500 + int mask = bits[i];
1.1501 + if (!mask) {
1.1502 + continue;
1.1503 + }
1.1504 + for (int j = 0; j < 8; j++) {
1.1505 + CGGlyph glyph;
1.1506 + UniChar unichar = static_cast<UniChar>((i << 3) + j);
1.1507 + if (mask & (1 << j) && CTFontGetGlyphsForCharacters(ctFont, &unichar, &glyph, 1)) {
1.1508 + out[glyph] = unichar;
1.1509 + }
1.1510 + }
1.1511 + }
1.1512 +}
1.1513 +
1.1514 +static bool getWidthAdvance(CTFontRef ctFont, int gId, int16_t* data) {
1.1515 + CGSize advance;
1.1516 + advance.width = 0;
1.1517 + CGGlyph glyph = gId;
1.1518 + CTFontGetAdvancesForGlyphs(ctFont, kCTFontHorizontalOrientation, &glyph, &advance, 1);
1.1519 + *data = sk_float_round2int(advance.width);
1.1520 + return true;
1.1521 +}
1.1522 +
1.1523 +// we might move this into our CGUtils...
1.1524 +static void CFStringToSkString(CFStringRef src, SkString* dst) {
1.1525 + // Reserve enough room for the worst-case string,
1.1526 + // plus 1 byte for the trailing null.
1.1527 + CFIndex length = CFStringGetMaximumSizeForEncoding(CFStringGetLength(src),
1.1528 + kCFStringEncodingUTF8) + 1;
1.1529 + dst->resize(length);
1.1530 + CFStringGetCString(src, dst->writable_str(), length, kCFStringEncodingUTF8);
1.1531 + // Resize to the actual UTF-8 length used, stripping the null character.
1.1532 + dst->resize(strlen(dst->c_str()));
1.1533 +}
1.1534 +
1.1535 +SkAdvancedTypefaceMetrics* SkTypeface_Mac::onGetAdvancedTypefaceMetrics(
1.1536 + SkAdvancedTypefaceMetrics::PerGlyphInfo perGlyphInfo,
1.1537 + const uint32_t* glyphIDs,
1.1538 + uint32_t glyphIDsCount) const {
1.1539 +
1.1540 + CTFontRef originalCTFont = fFontRef.get();
1.1541 + AutoCFRelease<CTFontRef> ctFont(CTFontCreateCopyWithAttributes(
1.1542 + originalCTFont, CTFontGetUnitsPerEm(originalCTFont), NULL, NULL));
1.1543 + SkAdvancedTypefaceMetrics* info = new SkAdvancedTypefaceMetrics;
1.1544 +
1.1545 + {
1.1546 + AutoCFRelease<CFStringRef> fontName(CTFontCopyPostScriptName(ctFont));
1.1547 + CFStringToSkString(fontName, &info->fFontName);
1.1548 + }
1.1549 +
1.1550 + info->fMultiMaster = false;
1.1551 + CFIndex glyphCount = CTFontGetGlyphCount(ctFont);
1.1552 + info->fLastGlyphID = SkToU16(glyphCount - 1);
1.1553 + info->fEmSize = CTFontGetUnitsPerEm(ctFont);
1.1554 +
1.1555 + if (perGlyphInfo & SkAdvancedTypefaceMetrics::kToUnicode_PerGlyphInfo) {
1.1556 + populate_glyph_to_unicode(ctFont, glyphCount, &info->fGlyphToUnicode);
1.1557 + }
1.1558 +
1.1559 + info->fStyle = 0;
1.1560 +
1.1561 + // If it's not a truetype font, mark it as 'other'. Assume that TrueType
1.1562 + // fonts always have both glyf and loca tables. At the least, this is what
1.1563 + // sfntly needs to subset the font. CTFontCopyAttribute() does not always
1.1564 + // succeed in determining this directly.
1.1565 + if (!this->getTableSize('glyf') || !this->getTableSize('loca')) {
1.1566 + info->fType = SkAdvancedTypefaceMetrics::kOther_Font;
1.1567 + info->fItalicAngle = 0;
1.1568 + info->fAscent = 0;
1.1569 + info->fDescent = 0;
1.1570 + info->fStemV = 0;
1.1571 + info->fCapHeight = 0;
1.1572 + info->fBBox = SkIRect::MakeEmpty();
1.1573 + return info;
1.1574 + }
1.1575 +
1.1576 + info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font;
1.1577 + CTFontSymbolicTraits symbolicTraits = CTFontGetSymbolicTraits(ctFont);
1.1578 + if (symbolicTraits & kCTFontMonoSpaceTrait) {
1.1579 + info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style;
1.1580 + }
1.1581 + if (symbolicTraits & kCTFontItalicTrait) {
1.1582 + info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style;
1.1583 + }
1.1584 + CTFontStylisticClass stylisticClass = symbolicTraits & kCTFontClassMaskTrait;
1.1585 + if (stylisticClass >= kCTFontOldStyleSerifsClass && stylisticClass <= kCTFontSlabSerifsClass) {
1.1586 + info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style;
1.1587 + } else if (stylisticClass & kCTFontScriptsClass) {
1.1588 + info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style;
1.1589 + }
1.1590 + info->fItalicAngle = (int16_t) CTFontGetSlantAngle(ctFont);
1.1591 + info->fAscent = (int16_t) CTFontGetAscent(ctFont);
1.1592 + info->fDescent = (int16_t) CTFontGetDescent(ctFont);
1.1593 + info->fCapHeight = (int16_t) CTFontGetCapHeight(ctFont);
1.1594 + CGRect bbox = CTFontGetBoundingBox(ctFont);
1.1595 +
1.1596 + SkRect r;
1.1597 + r.set( CGToScalar(CGRectGetMinX_inline(bbox)), // Left
1.1598 + CGToScalar(CGRectGetMaxY_inline(bbox)), // Top
1.1599 + CGToScalar(CGRectGetMaxX_inline(bbox)), // Right
1.1600 + CGToScalar(CGRectGetMinY_inline(bbox))); // Bottom
1.1601 +
1.1602 + r.roundOut(&(info->fBBox));
1.1603 +
1.1604 + // Figure out a good guess for StemV - Min width of i, I, !, 1.
1.1605 + // This probably isn't very good with an italic font.
1.1606 + int16_t min_width = SHRT_MAX;
1.1607 + info->fStemV = 0;
1.1608 + static const UniChar stem_chars[] = {'i', 'I', '!', '1'};
1.1609 + const size_t count = sizeof(stem_chars) / sizeof(stem_chars[0]);
1.1610 + CGGlyph glyphs[count];
1.1611 + CGRect boundingRects[count];
1.1612 + if (CTFontGetGlyphsForCharacters(ctFont, stem_chars, glyphs, count)) {
1.1613 + CTFontGetBoundingRectsForGlyphs(ctFont, kCTFontHorizontalOrientation,
1.1614 + glyphs, boundingRects, count);
1.1615 + for (size_t i = 0; i < count; i++) {
1.1616 + int16_t width = (int16_t) boundingRects[i].size.width;
1.1617 + if (width > 0 && width < min_width) {
1.1618 + min_width = width;
1.1619 + info->fStemV = min_width;
1.1620 + }
1.1621 + }
1.1622 + }
1.1623 +
1.1624 + if (false) { // TODO: haven't figured out how to know if font is embeddable
1.1625 + // (information is in the OS/2 table)
1.1626 + info->fType = SkAdvancedTypefaceMetrics::kNotEmbeddable_Font;
1.1627 + } else if (perGlyphInfo & SkAdvancedTypefaceMetrics::kHAdvance_PerGlyphInfo) {
1.1628 + if (info->fStyle & SkAdvancedTypefaceMetrics::kFixedPitch_Style) {
1.1629 + skia_advanced_typeface_metrics_utils::appendRange(&info->fGlyphWidths, 0);
1.1630 + info->fGlyphWidths->fAdvance.append(1, &min_width);
1.1631 + skia_advanced_typeface_metrics_utils::finishRange(info->fGlyphWidths.get(), 0,
1.1632 + SkAdvancedTypefaceMetrics::WidthRange::kDefault);
1.1633 + } else {
1.1634 + info->fGlyphWidths.reset(
1.1635 + skia_advanced_typeface_metrics_utils::getAdvanceData(ctFont.get(),
1.1636 + SkToInt(glyphCount),
1.1637 + glyphIDs,
1.1638 + glyphIDsCount,
1.1639 + &getWidthAdvance));
1.1640 + }
1.1641 + }
1.1642 + return info;
1.1643 +}
1.1644 +
1.1645 +///////////////////////////////////////////////////////////////////////////////
1.1646 +
1.1647 +static SK_SFNT_ULONG get_font_type_tag(const SkTypeface_Mac* typeface) {
1.1648 + CTFontRef ctFont = typeface->fFontRef.get();
1.1649 + AutoCFRelease<CFNumberRef> fontFormatRef(
1.1650 + static_cast<CFNumberRef>(CTFontCopyAttribute(ctFont, kCTFontFormatAttribute)));
1.1651 + if (!fontFormatRef) {
1.1652 + return 0;
1.1653 + }
1.1654 +
1.1655 + SInt32 fontFormatValue;
1.1656 + if (!CFNumberGetValue(fontFormatRef, kCFNumberSInt32Type, &fontFormatValue)) {
1.1657 + return 0;
1.1658 + }
1.1659 +
1.1660 + switch (fontFormatValue) {
1.1661 + case kCTFontFormatOpenTypePostScript:
1.1662 + return SkSFNTHeader::fontType_OpenTypeCFF::TAG;
1.1663 + case kCTFontFormatOpenTypeTrueType:
1.1664 + return SkSFNTHeader::fontType_WindowsTrueType::TAG;
1.1665 + case kCTFontFormatTrueType:
1.1666 + return SkSFNTHeader::fontType_MacTrueType::TAG;
1.1667 + case kCTFontFormatPostScript:
1.1668 + return SkSFNTHeader::fontType_PostScript::TAG;
1.1669 + case kCTFontFormatBitmap:
1.1670 + return SkSFNTHeader::fontType_MacTrueType::TAG;
1.1671 + case kCTFontFormatUnrecognized:
1.1672 + default:
1.1673 + //CT seems to be unreliable in being able to obtain the type,
1.1674 + //even if all we want is the first four bytes of the font resource.
1.1675 + //Just the presence of the FontForge 'FFTM' table seems to throw it off.
1.1676 + return SkSFNTHeader::fontType_WindowsTrueType::TAG;
1.1677 + }
1.1678 +}
1.1679 +
1.1680 +SkStream* SkTypeface_Mac::onOpenStream(int* ttcIndex) const {
1.1681 + SK_SFNT_ULONG fontType = get_font_type_tag(this);
1.1682 + if (0 == fontType) {
1.1683 + return NULL;
1.1684 + }
1.1685 +
1.1686 + // get table tags
1.1687 + int numTables = this->countTables();
1.1688 + SkTDArray<SkFontTableTag> tableTags;
1.1689 + tableTags.setCount(numTables);
1.1690 + this->getTableTags(tableTags.begin());
1.1691 +
1.1692 + // calc total size for font, save sizes
1.1693 + SkTDArray<size_t> tableSizes;
1.1694 + size_t totalSize = sizeof(SkSFNTHeader) + sizeof(SkSFNTHeader::TableDirectoryEntry) * numTables;
1.1695 + for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) {
1.1696 + size_t tableSize = this->getTableSize(tableTags[tableIndex]);
1.1697 + totalSize += (tableSize + 3) & ~3;
1.1698 + *tableSizes.append() = tableSize;
1.1699 + }
1.1700 +
1.1701 + // reserve memory for stream, and zero it (tables must be zero padded)
1.1702 + SkMemoryStream* stream = new SkMemoryStream(totalSize);
1.1703 + char* dataStart = (char*)stream->getMemoryBase();
1.1704 + sk_bzero(dataStart, totalSize);
1.1705 + char* dataPtr = dataStart;
1.1706 +
1.1707 + // compute font header entries
1.1708 + uint16_t entrySelector = 0;
1.1709 + uint16_t searchRange = 1;
1.1710 + while (searchRange < numTables >> 1) {
1.1711 + entrySelector++;
1.1712 + searchRange <<= 1;
1.1713 + }
1.1714 + searchRange <<= 4;
1.1715 + uint16_t rangeShift = (numTables << 4) - searchRange;
1.1716 +
1.1717 + // write font header
1.1718 + SkSFNTHeader* header = (SkSFNTHeader*)dataPtr;
1.1719 + header->fontType = fontType;
1.1720 + header->numTables = SkEndian_SwapBE16(numTables);
1.1721 + header->searchRange = SkEndian_SwapBE16(searchRange);
1.1722 + header->entrySelector = SkEndian_SwapBE16(entrySelector);
1.1723 + header->rangeShift = SkEndian_SwapBE16(rangeShift);
1.1724 + dataPtr += sizeof(SkSFNTHeader);
1.1725 +
1.1726 + // write tables
1.1727 + SkSFNTHeader::TableDirectoryEntry* entry = (SkSFNTHeader::TableDirectoryEntry*)dataPtr;
1.1728 + dataPtr += sizeof(SkSFNTHeader::TableDirectoryEntry) * numTables;
1.1729 + for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) {
1.1730 + size_t tableSize = tableSizes[tableIndex];
1.1731 + this->getTableData(tableTags[tableIndex], 0, tableSize, dataPtr);
1.1732 + entry->tag = SkEndian_SwapBE32(tableTags[tableIndex]);
1.1733 + entry->checksum = SkEndian_SwapBE32(SkOTUtils::CalcTableChecksum((SK_OT_ULONG*)dataPtr,
1.1734 + tableSize));
1.1735 + entry->offset = SkEndian_SwapBE32(SkToU32(dataPtr - dataStart));
1.1736 + entry->logicalLength = SkEndian_SwapBE32(SkToU32(tableSize));
1.1737 +
1.1738 + dataPtr += (tableSize + 3) & ~3;
1.1739 + ++entry;
1.1740 + }
1.1741 +
1.1742 + return stream;
1.1743 +}
1.1744 +
1.1745 +///////////////////////////////////////////////////////////////////////////////
1.1746 +///////////////////////////////////////////////////////////////////////////////
1.1747 +
1.1748 +int SkTypeface_Mac::onGetUPEM() const {
1.1749 + AutoCFRelease<CGFontRef> cgFont(CTFontCopyGraphicsFont(fFontRef, NULL));
1.1750 + return CGFontGetUnitsPerEm(cgFont);
1.1751 +}
1.1752 +
1.1753 +SkTypeface::LocalizedStrings* SkTypeface_Mac::onCreateFamilyNameIterator() const {
1.1754 + SkTypeface::LocalizedStrings* nameIter =
1.1755 + SkOTUtils::LocalizedStrings_NameTable::CreateForFamilyNames(*this);
1.1756 + if (NULL == nameIter) {
1.1757 + AutoCFRelease<CFStringRef> cfLanguage;
1.1758 + AutoCFRelease<CFStringRef> cfFamilyName(
1.1759 + CTFontCopyLocalizedName(fFontRef, kCTFontFamilyNameKey, &cfLanguage));
1.1760 +
1.1761 + SkString skLanguage;
1.1762 + SkString skFamilyName;
1.1763 + if (cfLanguage.get()) {
1.1764 + CFStringToSkString(cfLanguage.get(), &skLanguage);
1.1765 + } else {
1.1766 + skLanguage = "und"; //undetermined
1.1767 + }
1.1768 + if (cfFamilyName.get()) {
1.1769 + CFStringToSkString(cfFamilyName.get(), &skFamilyName);
1.1770 + }
1.1771 +
1.1772 + nameIter = new SkOTUtils::LocalizedStrings_SingleName(skFamilyName, skLanguage);
1.1773 + }
1.1774 + return nameIter;
1.1775 +}
1.1776 +
1.1777 +// If, as is the case with web fonts, the CTFont data isn't available,
1.1778 +// the CGFont data may work. While the CGFont may always provide the
1.1779 +// right result, leave the CTFont code path to minimize disruption.
1.1780 +static CFDataRef copyTableFromFont(CTFontRef ctFont, SkFontTableTag tag) {
1.1781 + CFDataRef data = CTFontCopyTable(ctFont, (CTFontTableTag) tag,
1.1782 + kCTFontTableOptionNoOptions);
1.1783 + if (NULL == data) {
1.1784 + AutoCFRelease<CGFontRef> cgFont(CTFontCopyGraphicsFont(ctFont, NULL));
1.1785 + data = CGFontCopyTableForTag(cgFont, tag);
1.1786 + }
1.1787 + return data;
1.1788 +}
1.1789 +
1.1790 +int SkTypeface_Mac::onGetTableTags(SkFontTableTag tags[]) const {
1.1791 + AutoCFRelease<CFArrayRef> cfArray(CTFontCopyAvailableTables(fFontRef,
1.1792 + kCTFontTableOptionNoOptions));
1.1793 + if (NULL == cfArray) {
1.1794 + return 0;
1.1795 + }
1.1796 + int count = SkToInt(CFArrayGetCount(cfArray));
1.1797 + if (tags) {
1.1798 + for (int i = 0; i < count; ++i) {
1.1799 + uintptr_t fontTag = reinterpret_cast<uintptr_t>(CFArrayGetValueAtIndex(cfArray, i));
1.1800 + tags[i] = static_cast<SkFontTableTag>(fontTag);
1.1801 + }
1.1802 + }
1.1803 + return count;
1.1804 +}
1.1805 +
1.1806 +size_t SkTypeface_Mac::onGetTableData(SkFontTableTag tag, size_t offset,
1.1807 + size_t length, void* dstData) const {
1.1808 + AutoCFRelease<CFDataRef> srcData(copyTableFromFont(fFontRef, tag));
1.1809 + if (NULL == srcData) {
1.1810 + return 0;
1.1811 + }
1.1812 +
1.1813 + size_t srcSize = CFDataGetLength(srcData);
1.1814 + if (offset >= srcSize) {
1.1815 + return 0;
1.1816 + }
1.1817 + if (length > srcSize - offset) {
1.1818 + length = srcSize - offset;
1.1819 + }
1.1820 + if (dstData) {
1.1821 + memcpy(dstData, CFDataGetBytePtr(srcData) + offset, length);
1.1822 + }
1.1823 + return length;
1.1824 +}
1.1825 +
1.1826 +SkScalerContext* SkTypeface_Mac::onCreateScalerContext(const SkDescriptor* desc) const {
1.1827 + return new SkScalerContext_Mac(const_cast<SkTypeface_Mac*>(this), desc);
1.1828 +}
1.1829 +
1.1830 +void SkTypeface_Mac::onFilterRec(SkScalerContextRec* rec) const {
1.1831 + if (rec->fFlags & SkScalerContext::kLCD_BGROrder_Flag ||
1.1832 + rec->fFlags & SkScalerContext::kLCD_Vertical_Flag)
1.1833 + {
1.1834 + rec->fMaskFormat = SkMask::kA8_Format;
1.1835 + // Render the glyphs as close as possible to what was requested.
1.1836 + // The above turns off subpixel rendering, but the user requested it.
1.1837 + // Normal hinting will cause the A8 masks to be generated from CoreGraphics subpixel masks.
1.1838 + // See comments below for more details.
1.1839 + rec->setHinting(SkPaint::kNormal_Hinting);
1.1840 + }
1.1841 +
1.1842 + unsigned flagsWeDontSupport = SkScalerContext::kDevKernText_Flag |
1.1843 + SkScalerContext::kForceAutohinting_Flag |
1.1844 + SkScalerContext::kLCD_BGROrder_Flag |
1.1845 + SkScalerContext::kLCD_Vertical_Flag;
1.1846 +
1.1847 + rec->fFlags &= ~flagsWeDontSupport;
1.1848 +
1.1849 + bool lcdSupport = supports_LCD();
1.1850 +
1.1851 + // Only two levels of hinting are supported.
1.1852 + // kNo_Hinting means avoid CoreGraphics outline dilation.
1.1853 + // kNormal_Hinting means CoreGraphics outline dilation is allowed.
1.1854 + // If there is no lcd support, hinting (dilation) cannot be supported.
1.1855 + SkPaint::Hinting hinting = rec->getHinting();
1.1856 + if (SkPaint::kSlight_Hinting == hinting || !lcdSupport) {
1.1857 + hinting = SkPaint::kNo_Hinting;
1.1858 + } else if (SkPaint::kFull_Hinting == hinting) {
1.1859 + hinting = SkPaint::kNormal_Hinting;
1.1860 + }
1.1861 + rec->setHinting(hinting);
1.1862 +
1.1863 + // FIXME: lcd smoothed un-hinted rasterization unsupported.
1.1864 + // Tracked by http://code.google.com/p/skia/issues/detail?id=915 .
1.1865 + // There is no current means to honor a request for unhinted lcd,
1.1866 + // so arbitrarilly ignore the hinting request and honor lcd.
1.1867 +
1.1868 + // Hinting and smoothing should be orthogonal, but currently they are not.
1.1869 + // CoreGraphics has no API to influence hinting. However, its lcd smoothed
1.1870 + // output is drawn from auto-dilated outlines (the amount of which is
1.1871 + // determined by AppleFontSmoothing). Its regular anti-aliased output is
1.1872 + // drawn from un-dilated outlines.
1.1873 +
1.1874 + // The behavior of Skia is as follows:
1.1875 + // [AA][no-hint]: generate AA using CoreGraphic's AA output.
1.1876 + // [AA][yes-hint]: use CoreGraphic's LCD output and reduce it to a single
1.1877 + // channel. This matches [LCD][yes-hint] in weight.
1.1878 + // [LCD][no-hint]: curently unable to honor, and must pick which to respect.
1.1879 + // Currenly side with LCD, effectively ignoring the hinting setting.
1.1880 + // [LCD][yes-hint]: generate LCD using CoreGraphic's LCD output.
1.1881 +
1.1882 + if (isLCDFormat(rec->fMaskFormat)) {
1.1883 + if (lcdSupport) {
1.1884 + //CoreGraphics creates 555 masks for smoothed text anyway.
1.1885 + rec->fMaskFormat = SkMask::kLCD16_Format;
1.1886 + rec->setHinting(SkPaint::kNormal_Hinting);
1.1887 + } else {
1.1888 + rec->fMaskFormat = SkMask::kA8_Format;
1.1889 + }
1.1890 + }
1.1891 +
1.1892 + // Unhinted A8 masks (those not derived from LCD masks) must respect SK_GAMMA_APPLY_TO_A8.
1.1893 + // All other masks can use regular gamma.
1.1894 + if (SkMask::kA8_Format == rec->fMaskFormat && SkPaint::kNo_Hinting == hinting) {
1.1895 +#ifndef SK_GAMMA_APPLY_TO_A8
1.1896 + rec->ignorePreBlend();
1.1897 +#endif
1.1898 + } else {
1.1899 + //CoreGraphics dialates smoothed text as needed.
1.1900 + rec->setContrast(0);
1.1901 + }
1.1902 +}
1.1903 +
1.1904 +// we take ownership of the ref
1.1905 +static const char* get_str(CFStringRef ref, SkString* str) {
1.1906 + CFStringToSkString(ref, str);
1.1907 + CFSafeRelease(ref);
1.1908 + return str->c_str();
1.1909 +}
1.1910 +
1.1911 +void SkTypeface_Mac::onGetFontDescriptor(SkFontDescriptor* desc,
1.1912 + bool* isLocalStream) const {
1.1913 + SkString tmpStr;
1.1914 +
1.1915 + desc->setFamilyName(get_str(CTFontCopyFamilyName(fFontRef), &tmpStr));
1.1916 + desc->setFullName(get_str(CTFontCopyFullName(fFontRef), &tmpStr));
1.1917 + desc->setPostscriptName(get_str(CTFontCopyPostScriptName(fFontRef), &tmpStr));
1.1918 + // TODO: need to add support for local-streams (here and openStream)
1.1919 + *isLocalStream = false;
1.1920 +}
1.1921 +
1.1922 +int SkTypeface_Mac::onCharsToGlyphs(const void* chars, Encoding encoding,
1.1923 + uint16_t glyphs[], int glyphCount) const
1.1924 +{
1.1925 + // Undocumented behavior of CTFontGetGlyphsForCharacters with non-bmp code points:
1.1926 + // When a surrogate pair is detected, the glyph index used is the index of the high surrogate.
1.1927 + // It is documented that if a mapping is unavailable, the glyph will be set to 0.
1.1928 +
1.1929 + SkAutoSTMalloc<1024, UniChar> charStorage;
1.1930 + const UniChar* src; // UniChar is a UTF-16 16-bit code unit.
1.1931 + int srcCount;
1.1932 + switch (encoding) {
1.1933 + case kUTF8_Encoding: {
1.1934 + const char* utf8 = reinterpret_cast<const char*>(chars);
1.1935 + UniChar* utf16 = charStorage.reset(2 * glyphCount);
1.1936 + src = utf16;
1.1937 + for (int i = 0; i < glyphCount; ++i) {
1.1938 + SkUnichar uni = SkUTF8_NextUnichar(&utf8);
1.1939 + utf16 += SkUTF16_FromUnichar(uni, utf16);
1.1940 + }
1.1941 + srcCount = SkToInt(utf16 - src);
1.1942 + break;
1.1943 + }
1.1944 + case kUTF16_Encoding: {
1.1945 + src = reinterpret_cast<const UniChar*>(chars);
1.1946 + int extra = 0;
1.1947 + for (int i = 0; i < glyphCount; ++i) {
1.1948 + if (SkUTF16_IsHighSurrogate(src[i + extra])) {
1.1949 + ++extra;
1.1950 + }
1.1951 + }
1.1952 + srcCount = glyphCount + extra;
1.1953 + break;
1.1954 + }
1.1955 + case kUTF32_Encoding: {
1.1956 + const SkUnichar* utf32 = reinterpret_cast<const SkUnichar*>(chars);
1.1957 + UniChar* utf16 = charStorage.reset(2 * glyphCount);
1.1958 + src = utf16;
1.1959 + for (int i = 0; i < glyphCount; ++i) {
1.1960 + utf16 += SkUTF16_FromUnichar(utf32[i], utf16);
1.1961 + }
1.1962 + srcCount = SkToInt(utf16 - src);
1.1963 + break;
1.1964 + }
1.1965 + }
1.1966 +
1.1967 + // If glyphs is NULL, CT still needs glyph storage for finding the first failure.
1.1968 + // Also, if there are any non-bmp code points, the provided 'glyphs' storage will be inadequate.
1.1969 + SkAutoSTMalloc<1024, uint16_t> glyphStorage;
1.1970 + uint16_t* macGlyphs = glyphs;
1.1971 + if (NULL == macGlyphs || srcCount > glyphCount) {
1.1972 + macGlyphs = glyphStorage.reset(srcCount);
1.1973 + }
1.1974 +
1.1975 + bool allEncoded = CTFontGetGlyphsForCharacters(fFontRef, src, macGlyphs, srcCount);
1.1976 +
1.1977 + // If there were any non-bmp, then copy and compact.
1.1978 + // If 'glyphs' is NULL, then compact glyphStorage in-place.
1.1979 + // If all are bmp and 'glyphs' is non-NULL, 'glyphs' already contains the compact glyphs.
1.1980 + // If some are non-bmp and 'glyphs' is non-NULL, copy and compact into 'glyphs'.
1.1981 + uint16_t* compactedGlyphs = glyphs;
1.1982 + if (NULL == compactedGlyphs) {
1.1983 + compactedGlyphs = macGlyphs;
1.1984 + }
1.1985 + if (srcCount > glyphCount) {
1.1986 + int extra = 0;
1.1987 + for (int i = 0; i < glyphCount; ++i) {
1.1988 + if (SkUTF16_IsHighSurrogate(src[i + extra])) {
1.1989 + ++extra;
1.1990 + }
1.1991 + compactedGlyphs[i] = macGlyphs[i + extra];
1.1992 + }
1.1993 + }
1.1994 +
1.1995 + if (allEncoded) {
1.1996 + return glyphCount;
1.1997 + }
1.1998 +
1.1999 + // If we got false, then we need to manually look for first failure.
1.2000 + for (int i = 0; i < glyphCount; ++i) {
1.2001 + if (0 == compactedGlyphs[i]) {
1.2002 + return i;
1.2003 + }
1.2004 + }
1.2005 + // Odd to get here, as we expected CT to have returned true up front.
1.2006 + return glyphCount;
1.2007 +}
1.2008 +
1.2009 +int SkTypeface_Mac::onCountGlyphs() const {
1.2010 + return SkToInt(CTFontGetGlyphCount(fFontRef));
1.2011 +}
1.2012 +
1.2013 +///////////////////////////////////////////////////////////////////////////////
1.2014 +///////////////////////////////////////////////////////////////////////////////
1.2015 +#if 1
1.2016 +
1.2017 +static bool find_desc_str(CTFontDescriptorRef desc, CFStringRef name, SkString* value) {
1.2018 + AutoCFRelease<CFStringRef> ref((CFStringRef)CTFontDescriptorCopyAttribute(desc, name));
1.2019 + if (NULL == ref.get()) {
1.2020 + return false;
1.2021 + }
1.2022 + CFStringToSkString(ref, value);
1.2023 + return true;
1.2024 +}
1.2025 +
1.2026 +static bool find_dict_float(CFDictionaryRef dict, CFStringRef name, float* value) {
1.2027 + CFNumberRef num;
1.2028 + return CFDictionaryGetValueIfPresent(dict, name, (const void**)&num)
1.2029 + && CFNumberIsFloatType(num)
1.2030 + && CFNumberGetValue(num, kCFNumberFloatType, value);
1.2031 +}
1.2032 +
1.2033 +#include "SkFontMgr.h"
1.2034 +
1.2035 +static int unit_weight_to_fontstyle(float unit) {
1.2036 + float value;
1.2037 + if (unit < 0) {
1.2038 + value = 100 + (1 + unit) * 300;
1.2039 + } else {
1.2040 + value = 400 + unit * 500;
1.2041 + }
1.2042 + return sk_float_round2int(value);
1.2043 +}
1.2044 +
1.2045 +static int unit_width_to_fontstyle(float unit) {
1.2046 + float value;
1.2047 + if (unit < 0) {
1.2048 + value = 1 + (1 + unit) * 4;
1.2049 + } else {
1.2050 + value = 5 + unit * 4;
1.2051 + }
1.2052 + return sk_float_round2int(value);
1.2053 +}
1.2054 +
1.2055 +static inline int sqr(int value) {
1.2056 + SkASSERT(SkAbs32(value) < 0x7FFF); // check for overflow
1.2057 + return value * value;
1.2058 +}
1.2059 +
1.2060 +// We normalize each axis (weight, width, italic) to be base-900
1.2061 +static int compute_metric(const SkFontStyle& a, const SkFontStyle& b) {
1.2062 + return sqr(a.weight() - b.weight()) +
1.2063 + sqr((a.width() - b.width()) * 100) +
1.2064 + sqr((a.isItalic() != b.isItalic()) * 900);
1.2065 +}
1.2066 +
1.2067 +static SkFontStyle desc2fontstyle(CTFontDescriptorRef desc) {
1.2068 + AutoCFRelease<CFDictionaryRef> dict(
1.2069 + (CFDictionaryRef)CTFontDescriptorCopyAttribute(desc,
1.2070 + kCTFontTraitsAttribute));
1.2071 + if (NULL == dict.get()) {
1.2072 + return SkFontStyle();
1.2073 + }
1.2074 +
1.2075 + float weight, width, slant;
1.2076 + if (!find_dict_float(dict, kCTFontWeightTrait, &weight)) {
1.2077 + weight = 0;
1.2078 + }
1.2079 + if (!find_dict_float(dict, kCTFontWidthTrait, &width)) {
1.2080 + width = 0;
1.2081 + }
1.2082 + if (!find_dict_float(dict, kCTFontSlantTrait, &slant)) {
1.2083 + slant = 0;
1.2084 + }
1.2085 +
1.2086 + return SkFontStyle(unit_weight_to_fontstyle(weight),
1.2087 + unit_width_to_fontstyle(width),
1.2088 + slant ? SkFontStyle::kItalic_Slant
1.2089 + : SkFontStyle::kUpright_Slant);
1.2090 +}
1.2091 +
1.2092 +struct NameFontStyleRec {
1.2093 + SkString fFamilyName;
1.2094 + SkFontStyle fFontStyle;
1.2095 +};
1.2096 +
1.2097 +static bool nameFontStyleProc(SkTypeface* face, SkTypeface::Style,
1.2098 + void* ctx) {
1.2099 + SkTypeface_Mac* macFace = (SkTypeface_Mac*)face;
1.2100 + const NameFontStyleRec* rec = (const NameFontStyleRec*)ctx;
1.2101 +
1.2102 + return macFace->fFontStyle == rec->fFontStyle &&
1.2103 + macFace->fName == rec->fFamilyName;
1.2104 +}
1.2105 +
1.2106 +static SkTypeface* createFromDesc(CFStringRef cfFamilyName,
1.2107 + CTFontDescriptorRef desc) {
1.2108 + NameFontStyleRec rec;
1.2109 + CFStringToSkString(cfFamilyName, &rec.fFamilyName);
1.2110 + rec.fFontStyle = desc2fontstyle(desc);
1.2111 +
1.2112 + SkTypeface* face = SkTypefaceCache::FindByProcAndRef(nameFontStyleProc,
1.2113 + &rec);
1.2114 + if (face) {
1.2115 + return face;
1.2116 + }
1.2117 +
1.2118 + AutoCFRelease<CFDictionaryRef> fontFamilyNameDictionary(
1.2119 + CFDictionaryCreate(kCFAllocatorDefault,
1.2120 + (const void**)&kCTFontFamilyNameAttribute, (const void**)&cfFamilyName,
1.2121 + 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks));
1.2122 + AutoCFRelease<CTFontDescriptorRef> fontDescriptor(
1.2123 + CTFontDescriptorCreateWithAttributes(fontFamilyNameDictionary));
1.2124 + AutoCFRelease<CTFontRef> ctNamed(CTFontCreateWithFontDescriptor(fontDescriptor, 0, NULL));
1.2125 + CTFontRef ctFont = CTFontCreateCopyWithAttributes(ctNamed, 1, NULL, desc);
1.2126 + if (NULL == ctFont) {
1.2127 + return NULL;
1.2128 + }
1.2129 +
1.2130 + SkString str;
1.2131 + CFStringToSkString(cfFamilyName, &str);
1.2132 +
1.2133 + bool isFixedPitch;
1.2134 + (void)computeStyleBits(ctFont, &isFixedPitch);
1.2135 + SkFontID fontID = CTFontRef_to_SkFontID(ctFont);
1.2136 +
1.2137 + face = SkNEW_ARGS(SkTypeface_Mac, (rec.fFontStyle, fontID, isFixedPitch,
1.2138 + ctFont, str.c_str()));
1.2139 + SkTypefaceCache::Add(face, face->style());
1.2140 + return face;
1.2141 +}
1.2142 +
1.2143 +class SkFontStyleSet_Mac : public SkFontStyleSet {
1.2144 +public:
1.2145 + SkFontStyleSet_Mac(CFStringRef familyName, CTFontDescriptorRef desc)
1.2146 + : fArray(CTFontDescriptorCreateMatchingFontDescriptors(desc, NULL))
1.2147 + , fFamilyName(familyName)
1.2148 + , fCount(0) {
1.2149 + CFRetain(familyName);
1.2150 + if (NULL == fArray) {
1.2151 + fArray = CFArrayCreate(NULL, NULL, 0, NULL);
1.2152 + }
1.2153 + fCount = SkToInt(CFArrayGetCount(fArray));
1.2154 + }
1.2155 +
1.2156 + virtual ~SkFontStyleSet_Mac() {
1.2157 + CFRelease(fArray);
1.2158 + CFRelease(fFamilyName);
1.2159 + }
1.2160 +
1.2161 + virtual int count() SK_OVERRIDE {
1.2162 + return fCount;
1.2163 + }
1.2164 +
1.2165 + virtual void getStyle(int index, SkFontStyle* style,
1.2166 + SkString* name) SK_OVERRIDE {
1.2167 + SkASSERT((unsigned)index < (unsigned)fCount);
1.2168 + CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray, index);
1.2169 + if (style) {
1.2170 + *style = desc2fontstyle(desc);
1.2171 + }
1.2172 + if (name) {
1.2173 + if (!find_desc_str(desc, kCTFontStyleNameAttribute, name)) {
1.2174 + name->reset();
1.2175 + }
1.2176 + }
1.2177 + }
1.2178 +
1.2179 + virtual SkTypeface* createTypeface(int index) SK_OVERRIDE {
1.2180 + SkASSERT((unsigned)index < (unsigned)CFArrayGetCount(fArray));
1.2181 + CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray, index);
1.2182 +
1.2183 + return createFromDesc(fFamilyName, desc);
1.2184 + }
1.2185 +
1.2186 + virtual SkTypeface* matchStyle(const SkFontStyle& pattern) SK_OVERRIDE {
1.2187 + if (0 == fCount) {
1.2188 + return NULL;
1.2189 + }
1.2190 + return createFromDesc(fFamilyName, findMatchingDesc(pattern));
1.2191 + }
1.2192 +
1.2193 +private:
1.2194 + CFArrayRef fArray;
1.2195 + CFStringRef fFamilyName;
1.2196 + int fCount;
1.2197 +
1.2198 + CTFontDescriptorRef findMatchingDesc(const SkFontStyle& pattern) const {
1.2199 + int bestMetric = SK_MaxS32;
1.2200 + CTFontDescriptorRef bestDesc = NULL;
1.2201 +
1.2202 + for (int i = 0; i < fCount; ++i) {
1.2203 + CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray, i);
1.2204 + int metric = compute_metric(pattern, desc2fontstyle(desc));
1.2205 + if (0 == metric) {
1.2206 + return desc;
1.2207 + }
1.2208 + if (metric < bestMetric) {
1.2209 + bestMetric = metric;
1.2210 + bestDesc = desc;
1.2211 + }
1.2212 + }
1.2213 + SkASSERT(bestDesc);
1.2214 + return bestDesc;
1.2215 + }
1.2216 +};
1.2217 +
1.2218 +class SkFontMgr_Mac : public SkFontMgr {
1.2219 + CFArrayRef fNames;
1.2220 + int fCount;
1.2221 +
1.2222 + CFStringRef stringAt(int index) const {
1.2223 + SkASSERT((unsigned)index < (unsigned)fCount);
1.2224 + return (CFStringRef)CFArrayGetValueAtIndex(fNames, index);
1.2225 + }
1.2226 +
1.2227 + static SkFontStyleSet* CreateSet(CFStringRef cfFamilyName) {
1.2228 + AutoCFRelease<CFMutableDictionaryRef> cfAttr(
1.2229 + CFDictionaryCreateMutable(kCFAllocatorDefault, 0,
1.2230 + &kCFTypeDictionaryKeyCallBacks,
1.2231 + &kCFTypeDictionaryValueCallBacks));
1.2232 +
1.2233 + CFDictionaryAddValue(cfAttr, kCTFontFamilyNameAttribute, cfFamilyName);
1.2234 +
1.2235 + AutoCFRelease<CTFontDescriptorRef> desc(
1.2236 + CTFontDescriptorCreateWithAttributes(cfAttr));
1.2237 + return SkNEW_ARGS(SkFontStyleSet_Mac, (cfFamilyName, desc));
1.2238 + }
1.2239 +
1.2240 +public:
1.2241 + SkFontMgr_Mac()
1.2242 + : fNames(SkCTFontManagerCopyAvailableFontFamilyNames())
1.2243 + , fCount(fNames ? SkToInt(CFArrayGetCount(fNames)) : 0) {}
1.2244 +
1.2245 + virtual ~SkFontMgr_Mac() {
1.2246 + CFSafeRelease(fNames);
1.2247 + }
1.2248 +
1.2249 +protected:
1.2250 + virtual int onCountFamilies() const SK_OVERRIDE {
1.2251 + return fCount;
1.2252 + }
1.2253 +
1.2254 + virtual void onGetFamilyName(int index, SkString* familyName) const SK_OVERRIDE {
1.2255 + if ((unsigned)index < (unsigned)fCount) {
1.2256 + CFStringToSkString(this->stringAt(index), familyName);
1.2257 + } else {
1.2258 + familyName->reset();
1.2259 + }
1.2260 + }
1.2261 +
1.2262 + virtual SkFontStyleSet* onCreateStyleSet(int index) const SK_OVERRIDE {
1.2263 + if ((unsigned)index >= (unsigned)fCount) {
1.2264 + return NULL;
1.2265 + }
1.2266 + return CreateSet(this->stringAt(index));
1.2267 + }
1.2268 +
1.2269 + virtual SkFontStyleSet* onMatchFamily(const char familyName[]) const SK_OVERRIDE {
1.2270 + AutoCFRelease<CFStringRef> cfName(make_CFString(familyName));
1.2271 + return CreateSet(cfName);
1.2272 + }
1.2273 +
1.2274 + virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
1.2275 + const SkFontStyle&) const SK_OVERRIDE {
1.2276 + return NULL;
1.2277 + }
1.2278 +
1.2279 + virtual SkTypeface* onMatchFaceStyle(const SkTypeface* familyMember,
1.2280 + const SkFontStyle&) const SK_OVERRIDE {
1.2281 + return NULL;
1.2282 + }
1.2283 +
1.2284 + virtual SkTypeface* onCreateFromData(SkData* data,
1.2285 + int ttcIndex) const SK_OVERRIDE {
1.2286 + AutoCFRelease<CGDataProviderRef> pr(SkCreateDataProviderFromData(data));
1.2287 + if (NULL == pr) {
1.2288 + return NULL;
1.2289 + }
1.2290 + return create_from_dataProvider(pr);
1.2291 + }
1.2292 +
1.2293 + virtual SkTypeface* onCreateFromStream(SkStream* stream,
1.2294 + int ttcIndex) const SK_OVERRIDE {
1.2295 + AutoCFRelease<CGDataProviderRef> pr(SkCreateDataProviderFromStream(stream));
1.2296 + if (NULL == pr) {
1.2297 + return NULL;
1.2298 + }
1.2299 + return create_from_dataProvider(pr);
1.2300 + }
1.2301 +
1.2302 + virtual SkTypeface* onCreateFromFile(const char path[],
1.2303 + int ttcIndex) const SK_OVERRIDE {
1.2304 + AutoCFRelease<CGDataProviderRef> pr(CGDataProviderCreateWithFilename(path));
1.2305 + if (NULL == pr) {
1.2306 + return NULL;
1.2307 + }
1.2308 + return create_from_dataProvider(pr);
1.2309 + }
1.2310 +
1.2311 + virtual SkTypeface* onLegacyCreateTypeface(const char familyName[],
1.2312 + unsigned styleBits) const SK_OVERRIDE {
1.2313 + return create_typeface(NULL, familyName, (SkTypeface::Style)styleBits);
1.2314 + }
1.2315 +};
1.2316 +
1.2317 +///////////////////////////////////////////////////////////////////////////////
1.2318 +
1.2319 +SkFontMgr* SkFontMgr::Factory() {
1.2320 + return SkNEW(SkFontMgr_Mac);
1.2321 +}
1.2322 +#endif
1.2323 +
1.2324 +SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace,
1.2325 + const char famillyName[],
1.2326 + SkTypeface::Style style)
1.2327 +{
1.2328 + SkDEBUGFAIL("SkFontHost::FindTypeface unimplemented");
1.2329 + return NULL;
1.2330 +}
1.2331 +
1.2332 +SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream*)
1.2333 +{
1.2334 + SkDEBUGFAIL("SkFontHost::CreateTypeface unimplemented");
1.2335 + return NULL;
1.2336 +}
1.2337 +
1.2338 +SkTypeface* SkFontHost::CreateTypefaceFromFile(char const*)
1.2339 +{
1.2340 + SkDEBUGFAIL("SkFontHost::CreateTypefaceFromFile unimplemented");
1.2341 + return NULL;
1.2342 +}
1.2343 +
