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Diffstat (limited to 'WebCore/platform/graphics/chromium/FontPlatformDataChromiumMac.mm')
| -rw-r--r-- | WebCore/platform/graphics/chromium/FontPlatformDataChromiumMac.mm | 458 |
1 files changed, 0 insertions, 458 deletions
diff --git a/WebCore/platform/graphics/chromium/FontPlatformDataChromiumMac.mm b/WebCore/platform/graphics/chromium/FontPlatformDataChromiumMac.mm deleted file mode 100644 index ad7ebba..0000000 --- a/WebCore/platform/graphics/chromium/FontPlatformDataChromiumMac.mm +++ /dev/null @@ -1,458 +0,0 @@ -/* - * This file is part of the internal font implementation. - * - * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. - * Copyright (c) 2010 Google Inc. All rights reserved. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public License - * along with this library; see the file COPYING.LIB. If not, write to - * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, - * Boston, MA 02110-1301, USA. - * - */ - -// This file is a clone of platform/graphics/mac/FontPlatformDataMac.mm. -// Because we want to support loading fonts between processes in the face of -// font loading being blocked by the sandbox, we must maintain a fork. -// Please maintain this file by performing parallel changes to it. -// -// The only changes from FontPlatformDataMac should be: -// - The functions at the top of this file for loading and caching fonts -// cross-process. -// - Changes to FontPlatformData::FontPlatformData(NSFont,bool,bool) -// - Changes to FontPlatformData::setFont() -// - Changes to FontPlatformData::~FontPlatformData() -// - Calls to refMemoryFont() in FontPlatformData::operator= and copy -// constructor. -// -// All changes are marked with "Start/End Chromium Change" -// -// For all other differences, if it was introduced in this file, then the -// maintainer forgot to include it in the list; otherwise it is an update that -// should have been applied to this file but was not. - - -// Start Chromium Change -#import "config.h" -#import "../graphics/mac/FontPlatformData.h" - -#import "ChromiumBridge.h" -#import "PlatformString.h" -#import "WebCoreSystemInterface.h" -#import <AppKit/NSFont.h> -#import <wtf/HashMap.h> -#import <wtf/RefCounted.h> -#import <wtf/RetainPtr.h> -#import <wtf/Vector.h> - -namespace WebCore { - -namespace { - -class MemoryActivatedFont; -typedef HashMap<ATSFontRef, MemoryActivatedFont*> FontRefMemoryFontHash; -typedef HashMap<ATSFontContainerRef, MemoryActivatedFont*> FontContainerRefMemoryFontHash; - -// On 10.5, font loading is not blocked by the sandbox and thus there is no -// need for the cross-process font loading mechanim. -// On system versions >=10.6 cross-process font loading is required. -bool OutOfProcessFontLoadingEnabled() -{ - static SInt32 systemVersion = 0; - if (!systemVersion) { - if (Gestalt(gestaltSystemVersion, &systemVersion) != noErr) - return false; - } - - return systemVersion >= 0x1060; -} - -FontContainerRefMemoryFontHash& fontCacheBySrcFontContainerRef() -{ - DEFINE_STATIC_LOCAL(FontContainerRefMemoryFontHash, srcFontRefCache, ()); - return srcFontRefCache; -} - -FontRefMemoryFontHash& fontCacheByActualFontRef() -{ - DEFINE_STATIC_LOCAL(FontRefMemoryFontHash, realFontRefCache, ()); - return realFontRefCache; -} - -ATSFontContainerRef fontContainerRefFromNSFont(NSFont* srcFont) -{ - ATSFontRef fontRef = CTFontGetPlatformFont(toCTFontRef(srcFont), 0); - if (!fontRef) - return kATSFontContainerRefUnspecified; - ATSFontContainerRef fontContainer = kATSFontContainerRefUnspecified; - if (ATSFontGetContainer(fontRef, 0, &fontContainer) != noErr) - return kATSFontContainerRefUnspecified; - return fontContainer; -} - -// MemoryActivatedFont encapsulates a font loaded from another process and -// activated from memory. -// -// Responsibilities: -// * Holder for the CGFontRef & ATSFontRef belonging to the activated font. -// * Responsible for unloading the font container when done. -// -// Memory Management: -// The class is reference counted, with each instance of FontPlatformData that -// uses this class holding a reference to it. -// Entries in 2 hashes are maintained internally to allow quick lookup -// of existing instances for reuse: -// - fontCacheBySrcFontContainerRef() - key is the ATSFontContainerRef -// corresponding to the *original in-process NSFont* whose loading was blocked -// by the sandbox. -// This is needed to allow lookup of a pre-existing MemoryActivatedFont when -// creating a new FontPlatformData object. -// - fontCacheByActualFontRef() - key is the ATSFontRef corresponding to the -// *new in-memory font* that we got from the browser process. -// This is needed so that a FontPlatformData object can refer back to the -// MemoryActivatedFont it's using. Currently this is only needed to release -// the font on FontPlatformData destruction. -// -// Assumptions: -// This code assumes that an ATSFontRef is a unique identifier tied to an -// activated font. i.e. After we activate a font, its ATSFontRef doesn't -// change. -// It also assumes that the ATSFoncontainerRef for two in-memory NSFonts that -// correspond to the same on-disk font file are always the same and don't change -// with time. -// -// Flushing caches: -// When the system notifies us of a system font cache flush, all FontDataCache -// objects are destroyed. This should in turn dereference all -// MemoryActivatedFonts and thus unload all in-memory fonts. -class MemoryActivatedFont : public RefCounted<MemoryActivatedFont> { -public: - // srcFontRef - ATSFontRef belonging to the NSFont object that failed to - // load in-process. - // container - a font container corresponding to an identical font that - // we loaded cross-process. - MemoryActivatedFont(ATSFontContainerRef srcFontContainerRef, ATSFontContainerRef container) - : m_fontContainer(container) - , m_atsFontRef(kATSFontRefUnspecified) - , m_srcFontContainerRef(srcFontContainerRef) - { - if (!container) - return; - - // Count the number of fonts in the container. - ItemCount fontCount = 0; - OSStatus err = ATSFontFindFromContainer(container, kATSOptionFlagsDefault, 0, 0, &fontCount); - if (err != noErr || fontCount < 1) - return; - - // For now always assume that we want the first font in the container. - ATSFontFindFromContainer(container, kATSOptionFlagsDefault, 1, &m_atsFontRef, 0); - - if (!m_atsFontRef) - return; - - // Cache CGFont representation of the font. - m_cgFont.adoptCF(CGFontCreateWithPlatformFont(&m_atsFontRef)); - - if (!m_cgFont.get()) - return; - - // Add ourselves to caches. - fontCacheBySrcFontContainerRef().add(m_srcFontContainerRef, this); - fontCacheByActualFontRef().add(m_atsFontRef, this); - } - - // Get cached CGFontRef corresponding to the in-memory font. - CGFontRef cgFont() - { - return m_cgFont.get(); - } - - // Get cached ATSFontRef corresponding to the in-memory font. - ATSFontRef atsFontRef() - { - return m_atsFontRef; - } - - // Destructor - Unload font container from memory and remove ourselves - // from hashes. - ~MemoryActivatedFont() - { - if (m_cgFont.get()) { // Object construction succeeded. - // First remove ourselves from the caches. - ASSERT(fontCacheBySrcFontContainerRef().contains(m_srcFontContainerRef)); - ASSERT(fontCacheByActualFontRef().contains(m_atsFontRef)); - - fontCacheBySrcFontContainerRef().remove(m_srcFontContainerRef); - fontCacheByActualFontRef().remove(m_atsFontRef); - - // Make sure the CGFont is destroyed before its font container. - m_cgFont.releaseRef(); - } - - if (m_fontContainer != kATSFontContainerRefUnspecified) - ATSFontDeactivate(m_fontContainer, 0, kATSOptionFlagsDefault); - } - -private: - ATSFontContainerRef m_fontContainer; - WTF::RetainPtr<CGFontRef> m_cgFont; - ATSFontRef m_atsFontRef; - ATSFontContainerRef m_srcFontContainerRef; -}; - -// The only way we can tell that an in-process font has failed to load -// is if CTFontCopyGraphicsFont() returns the LastResort font. -bool isLastResortFont(CGFontRef cgFont) -{ - NSString* fontName = (NSString*)CGFontCopyPostScriptName(cgFont); - return [fontName isEqualToString:@"LastResort"]; -} - -// Given an in-process font which has failed to load, return a -// MemoryActivatedFont* corresponding to an in-memory representation of the -// same font loaded from the browser process. -// The caller is responsbile for calling derefMemoryFont() on the ATSFontRef -// of the returned font. -// On failure this function returns 0, in which case the caller doesn't need -// to perform any additional cleanup. -MemoryActivatedFont* loadFontFromBrowserProcess(NSFont* nsFont) -{ - ATSFontContainerRef container; - // Send cross-process request to load font. - if (!ChromiumBridge::loadFont(nsFont, &container)) - return 0; - - ATSFontContainerRef srcFontContainerRef = fontContainerRefFromNSFont(nsFont); - if (!srcFontContainerRef) { - ATSFontDeactivate(container, 0, kATSOptionFlagsDefault); - return 0; - } - - MemoryActivatedFont* font = fontCacheBySrcFontContainerRef().get(srcFontContainerRef); - if (!font) { - font = new MemoryActivatedFont(srcFontContainerRef, container); - if (!font->cgFont()) { - delete font; - return 0; - } - } else { - font->ref(); - } - - return font; -} - -// deref() the MemoryActivatedFont corresponding to the given ATSFontRef. If no -// corresponding MemoryActivatedFont object exists, no action is performed. -void derefMemoryFont(ATSFontRef fontRef) -{ - if (fontRef == kATSFontRefUnspecified) - return; - MemoryActivatedFont* font = fontCacheByActualFontRef().get(fontRef); - if (font) - font->deref(); -} - -// ref() the MemoryActivatedFont corresponding to the given ATSFontRef. If no -// corresponding MemoryActivatedFont object exists, no action is performed. -void refMemoryFont(ATSFontRef fontRef) -{ - if (fontRef == kATSFontRefUnspecified) - return; - MemoryActivatedFont* font = fontCacheByActualFontRef().get(fontRef); - if (font) - font->ref(); -} - -// Given an NSFont, try to load a representation of that font into the cgFont -// parameter. If loading is blocked by the sandbox, the font may be loaded -// cross-process. -// If sandbox loading also fails, a fallback font is loaded. -// -// Considerations: -// * cgFont must be CFReleas()ed by the caller when done. -// -// Parameters: -// * nsFont - The font we wish to load. -// * fontSize - point size of the font we wish to load. -// * outNSFont - The font that was actually loaded, may be different from nsFont -// if a fallback font was used. -// * cgFont - on output this contains the CGFontRef corresponding to the NSFont -// that was picked in the end. The caller is responsible for calling -// CFRelease() on this parameter when done with it. -// * fontID - on output, the ID corresponding to nsFont. -void loadFont(NSFont* nsFont, float fontSize, NSFont*& outNSFont, CGFontRef& cgFont, ATSUFontID& fontID) -{ - outNSFont = nsFont; - cgFont = CTFontCopyGraphicsFont(toCTFontRef(outNSFont), 0); - MemoryActivatedFont* memFont = 0; - if (OutOfProcessFontLoadingEnabled() && outNSFont && cgFont && isLastResortFont(cgFont)) { - // Release old CGFontRef since it points at the LastResort font which we don't want. - CFRelease(cgFont); - cgFont = 0; - - // Font loading was blocked by the Sandbox. - memFont = loadFontFromBrowserProcess(outNSFont); - if (memFont) { - cgFont = memFont->cgFont(); - - // Need to add an extra retain so output semantics of this function - // are consistent. - CFRetain(cgFont); - } else { - // If we still can't load the font, then return Times, - // rather than the LastResort font. - outNSFont = [NSFont fontWithName:@"Times" size:fontSize]; - cgFont = CTFontCopyGraphicsFont(toCTFontRef(outNSFont), 0); - } - } - - if (memFont) { - fontID = memFont->atsFontRef(); - } else { - fontID = CTFontGetPlatformFont(toCTFontRef(outNSFont), 0); - } -} - -} // namespace -// End Chromium Change - -FontPlatformData::FontPlatformData(NSFont *nsFont, bool syntheticBold, bool syntheticOblique) - : m_syntheticBold(syntheticBold) - , m_syntheticOblique(syntheticOblique) - , m_font(nsFont) -#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD) - , m_isColorBitmapFont(CTFontGetSymbolicTraits(toCTFontRef(nsFont)) & kCTFontColorGlyphsTrait) -#else - , m_isColorBitmapFont(false) -#endif -{ -// Start Chromium Change - m_size = nsFont ? [nsFont pointSize] : 0.0f; - CGFontRef cgFont = 0; - NSFont* loadedFont = 0; - loadFont(nsFont, m_size, loadedFont, cgFont, m_atsuFontID); - m_font = loadedFont; - if (m_font) - CFRetain(m_font); - m_cgFont.adoptCF(cgFont); -// End Chromium Change -} - -FontPlatformData::FontPlatformData(const FontPlatformData& f) -{ - m_font = f.m_font && f.m_font != reinterpret_cast<NSFont *>(-1) ? const_cast<NSFont *>(static_cast<const NSFont *>(CFRetain(f.m_font))) : f.m_font; - - m_syntheticBold = f.m_syntheticBold; - m_syntheticOblique = f.m_syntheticOblique; - m_size = f.m_size; - m_cgFont = f.m_cgFont; - m_atsuFontID = f.m_atsuFontID; - m_isColorBitmapFont = f.m_isColorBitmapFont; - // Start Chromium Change - refMemoryFont(m_atsuFontID); - // End Chromium Change -} - -FontPlatformData::~FontPlatformData() -{ - if (m_font && m_font != reinterpret_cast<NSFont *>(-1)) - CFRelease(m_font); - - // Start Chromium Change - derefMemoryFont(m_atsuFontID); - // End Chromium Change -} - -const FontPlatformData& FontPlatformData::operator=(const FontPlatformData& f) -{ - m_syntheticBold = f.m_syntheticBold; - m_syntheticOblique = f.m_syntheticOblique; - m_size = f.m_size; - m_cgFont = f.m_cgFont; - m_atsuFontID = f.m_atsuFontID; - if (m_font == f.m_font) - return *this; - if (f.m_font && f.m_font != reinterpret_cast<NSFont *>(-1)) - CFRetain(f.m_font); - if (m_font && m_font != reinterpret_cast<NSFont *>(-1)) - CFRelease(m_font); - m_font = f.m_font; - m_isColorBitmapFont = f.m_isColorBitmapFont; - // Start Chromium Change - refMemoryFont(m_atsuFontID); - // End Chromium Change - return *this; -} - -void FontPlatformData::setFont(NSFont *font) -{ - if (m_font == font) - return; - if (font) - CFRetain(font); - if (m_font && m_font != reinterpret_cast<NSFont *>(-1)) - CFRelease(m_font); - m_font = font; - m_size = font ? [font pointSize] : 0.0f; - - // Start Chromium Change - CGFontRef cgFont = 0; - NSFont* loadedFont = 0; - loadFont(m_font, m_size, loadedFont, cgFont, m_atsuFontID); - - // If loadFont replaced m_font with a fallback font, then release the - // previous font to counter the retain above. Then retain the new font. - if (loadedFont != m_font) { - CFRelease(m_font); - m_font = loadedFont; - CFRetain(m_font); - } - m_cgFont.adoptCF(cgFont); -#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD) - m_isColorBitmapFont = CTFontGetSymbolicTraits(toCTFontRef(m_font)) & kCTFontColorGlyphsTrait; -#endif - // End Chromium Change -} - -bool FontPlatformData::roundsGlyphAdvances() const -{ - return [m_font renderingMode] == NSFontAntialiasedIntegerAdvancementsRenderingMode; -} - -bool FontPlatformData::allowsLigatures() const -{ - return ![[m_font coveredCharacterSet] characterIsMember:'a']; -} - -#if USE(CORE_TEXT) -CTFontRef FontPlatformData::ctFont() const -{ - if (m_font) - return toCTFontRef(m_font); - if (!m_CTFont) - m_CTFont.adoptCF(CTFontCreateWithGraphicsFont(m_cgFont.get(), m_size, 0, 0)); - return m_CTFont.get(); -} -#endif // USE(CORE_TEXT) - -#ifndef NDEBUG -String FontPlatformData::description() const -{ - RetainPtr<CFStringRef> cgFontDescription(AdoptCF, CFCopyDescription(cgFont())); - return String(cgFontDescription.get()) + " " + String::number(m_size) + (m_syntheticBold ? " synthetic bold" : "") + (m_syntheticOblique ? " synthetic oblique" : ""); -} -#endif - -} // namespace WebCore |