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      1 /*
      2  * Copyright (C) 2007, 2008, 2010 Apple Inc. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #include "config.h"
     22 #include "FontCustomPlatformData.h"
     23 
     24 #include "FontPlatformData.h"
     25 #include "OpenTypeSanitizer.h"
     26 #include "SharedBuffer.h"
     27 #include "WOFFFileFormat.h"
     28 #include <ApplicationServices/ApplicationServices.h>
     29 
     30 namespace WebCore {
     31 
     32 FontCustomPlatformData::~FontCustomPlatformData()
     33 {
     34 #if defined(BUILDING_ON_TIGER) || defined(BUILDING_ON_LEOPARD)
     35     if (m_atsContainer)
     36         ATSFontDeactivate(m_atsContainer, NULL, kATSOptionFlagsDefault);
     37 #endif
     38     CGFontRelease(m_cgFont);
     39 }
     40 
     41 FontPlatformData FontCustomPlatformData::fontPlatformData(int size, bool bold, bool italic, FontOrientation orientation, TextOrientation textOrientation, FontWidthVariant widthVariant, FontRenderingMode)
     42 {
     43     return FontPlatformData(m_cgFont, size, bold, italic, orientation, textOrientation, widthVariant);
     44 }
     45 
     46 FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer)
     47 {
     48     ASSERT_ARG(buffer, buffer);
     49 
     50 #if ENABLE(OPENTYPE_SANITIZER)
     51     OpenTypeSanitizer sanitizer(buffer);
     52     RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize();
     53     if (!transcodeBuffer)
     54         return 0; // validation failed.
     55     buffer = transcodeBuffer.get();
     56 #else
     57     RefPtr<SharedBuffer> sfntBuffer;
     58     if (isWOFF(buffer)) {
     59         Vector<char> sfnt;
     60         if (!convertWOFFToSfnt(buffer, sfnt))
     61             return 0;
     62 
     63         sfntBuffer = SharedBuffer::adoptVector(sfnt);
     64         buffer = sfntBuffer.get();
     65     }
     66 #endif
     67 
     68     ATSFontContainerRef containerRef = 0;
     69 
     70     RetainPtr<CGFontRef> cgFontRef;
     71 
     72 #if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD)
     73     RetainPtr<CFDataRef> bufferData(AdoptCF, buffer->createCFData());
     74     RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateWithCFData(bufferData.get()));
     75 
     76     cgFontRef.adoptCF(CGFontCreateWithDataProvider(dataProvider.get()));
     77     if (!cgFontRef)
     78         return 0;
     79 #else
     80     // Use ATS to activate the font.
     81 
     82     // The value "3" means that the font is private and can't be seen by anyone else.
     83     ATSFontActivateFromMemory((void*)buffer->data(), buffer->size(), 3, kATSFontFormatUnspecified, NULL, kATSOptionFlagsDefault, &containerRef);
     84     if (!containerRef)
     85         return 0;
     86     ItemCount fontCount;
     87     ATSFontFindFromContainer(containerRef, kATSOptionFlagsDefault, 0, NULL, &fontCount);
     88 
     89     // We just support the first font in the list.
     90     if (fontCount == 0) {
     91         ATSFontDeactivate(containerRef, NULL, kATSOptionFlagsDefault);
     92         return 0;
     93     }
     94 
     95     ATSFontRef fontRef = 0;
     96     ATSFontFindFromContainer(containerRef, kATSOptionFlagsDefault, 1, &fontRef, NULL);
     97     if (!fontRef) {
     98         ATSFontDeactivate(containerRef, NULL, kATSOptionFlagsDefault);
     99         return 0;
    100     }
    101 
    102     cgFontRef.adoptCF(CGFontCreateWithPlatformFont(&fontRef));
    103 #ifndef BUILDING_ON_TIGER
    104     // Workaround for <rdar://problem/5675504>.
    105     if (cgFontRef && !CGFontGetNumberOfGlyphs(cgFontRef.get()))
    106         cgFontRef = 0;
    107 #endif
    108     if (!cgFontRef) {
    109         ATSFontDeactivate(containerRef, NULL, kATSOptionFlagsDefault);
    110         return 0;
    111     }
    112 #endif // !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD)
    113 
    114     return new FontCustomPlatformData(containerRef, cgFontRef.releaseRef());
    115 }
    116 
    117 bool FontCustomPlatformData::supportsFormat(const String& format)
    118 {
    119     return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype") || equalIgnoringCase(format, "woff");
    120 }
    121 
    122 }
    123