113 lines
3.3 KiB
Objective-C
113 lines
3.3 KiB
Objective-C
// note: this doesn't work for languages; we have to parse the ltag table
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// fortunately features that aren't supported are simply ignored, so we can copy them all in
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// LONGTERM FUTURE when we switch to 10.9, the language parameter won't be needed anymore
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// LONGTERM FUTURE and on 10.10 we can use OpenType tags directly!
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CTFontDescriptorRef fontdescAppendFeatures(CTFontDescriptorRef desc, const uint16_t *types, const uint16_t *selectors, size_t n, const char *language)
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{
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CTFontDescriptorRef new;
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CFMutableArrayRef outerArray;
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CFDictionaryRef innerDict;
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CFNumberRef numType, numSelector;
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const void *keys[2], *values[2];
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size_t i;
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CFArrayRef languages;
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CFIndex il, nl;
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CFStringRef curlang;
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char d[2];
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outerArray = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
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if (outerArray == NULL) {
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// TODO
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}
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keys[0] = kCTFontFeatureTypeIdentifierKey;
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keys[1] = kCTFontFeatureSelectorIdentifierKey;
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for (i = 0; i < n; i++) {
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numType = CFNumberCreate(NULL, kCFNumberSInt16Type,
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(const SInt16 *) (types + i));
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numSelector = CFNumberCreate(NULL, kCFNumberSInt16Type,
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(const SInt16 *) (selectors + i));
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values[0] = numType;
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values[1] = numSelector;
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innerDict = CFDictionaryCreate(NULL,
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keys, values, 2,
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// TODO are these correct?
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&kCFCopyStringDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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if (innerDict == NULL) {
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// TODO
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}
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CFArrayAppendValue(outerArray, innerDict);
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CFRelease(innerDict);
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CFRelease(numSelector);
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CFRelease(numType);
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}
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// now we have to take care of the language
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if (language != NULL) {
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languages = CTFontDescriptorCopyAttribute(desc, kCTFontLanguagesAttribute);
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if (languages != NULL) {
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nl = CFArrayGetCount(languages);
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d[0] = language[0];
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if (d[0] >= 'A' && d[0] <= 'Z')
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d[0] += 'a' - 'A';
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d[1] = language[1];
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if (d[1] >= 'A' && d[1] <= 'Z')
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d[1] += 'a' - 'A';
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for (il = 0; il < nl; il++) {
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char c[2];
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curlang = (CFStringRef) CFArrayGetValueAtIndex(languages, il);
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// TODO check for failure
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CFStringGetBytes(curlang, CFRangeMake(0, 2),
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kCFStringEncodingUTF8, 0, false,
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(UInt8 *) c, 2, NULL);
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if (c[0] >= 'A' && c[0] <= 'Z')
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c[0] += 'a' - 'A';
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if (c[1] >= 'A' && c[1] <= 'Z')
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c[1] += 'a' - 'A';
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if (c[0] == d[0] && c[1] == d[1])
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break;
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}
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if (il != nl) {
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uint16_t typ;
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typ = kLanguageTagType;
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il++;
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numType = CFNumberCreate(NULL, kCFNumberSInt16Type,
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(const SInt16 *) (&typ));
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numSelector = CFNumberCreate(NULL, kCFNumberCFIndexType,
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&il);
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values[0] = numType;
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values[1] = numSelector;
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innerDict = CFDictionaryCreate(NULL,
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keys, values, 2,
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// TODO are these correct?
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&kCFCopyStringDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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if (innerDict == NULL) {
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// TODO
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}
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CFArrayAppendValue(outerArray, innerDict);
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CFRelease(innerDict);
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CFRelease(numSelector);
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CFRelease(numType);
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}
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CFRelease(languages);
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}
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}
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keys[0] = kCTFontFeatureSettingsAttribute;
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values[0] = outerArray;
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innerDict = CFDictionaryCreate(NULL,
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keys, values, 1,
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// TODO are these correct?
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&kCFCopyStringDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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CFRelease(outerArray);
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new = CTFontDescriptorCreateCopyWithAttributes(desc, innerDict);
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CFRelease(desc);
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CFRelease(innerDict);
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return new;
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}
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