First Commit

libui-ng/darwin/opentype.m

@@ -0,0 +1,113 @@
+// 11 may 2017
+#import "uipriv_darwin.h"
+#import "attrstr.h"
+
+struct addCTFeatureEntryParams {
+	CFMutableArrayRef array;
+	const void *tagKey;
+	BOOL tagIsNumber;
+	CFNumberType tagType;
+	const void *tagValue;
+	const void *valueKey;
+	CFNumberType valueType;
+	const void *valueValue;
+};
+
+static void addCTFeatureEntry(struct addCTFeatureEntryParams *p)
+{
+	CFDictionaryRef featureDict;
+	CFNumberRef tagNum, valueNum;
+	const void *keys[2], *values[2];
+
+	keys[0] = p->tagKey;
+	tagNum = NULL;
+	values[0] = p->tagValue;
+	if (p->tagIsNumber) {
+		tagNum = CFNumberCreate(NULL, p->tagType, p->tagValue);
+		values[0] = tagNum;
+	}
+
+	keys[1] = p->valueKey;
+	valueNum = CFNumberCreate(NULL, p->valueType, p->valueValue);
+	values[1] = valueNum;
+
+	featureDict = CFDictionaryCreate(NULL,
+		keys, values, 2,
+		// TODO are these correct?
+		&kCFCopyStringDictionaryKeyCallBacks,
+		&kCFTypeDictionaryValueCallBacks);
+	if (featureDict == NULL) {
+		// TODO
+	}
+	CFArrayAppendValue(p->array, featureDict);
+
+	CFRelease(featureDict);
+	CFRelease(valueNum);
+	if (p->tagIsNumber)
+		CFRelease(tagNum);
+}
+
+static uiForEach otfArrayForEachAAT(const uiOpenTypeFeatures *otf, char a, char b, char c, char d, uint32_t value, void *data)
+{
+	__block struct addCTFeatureEntryParams p;
+
+	p.array = (CFMutableArrayRef) data;
+	p.tagIsNumber = YES;
+	uiprivOpenTypeToAAT(a, b, c, d, value, ^(uint16_t type, uint16_t selector) {
+		p.tagKey = kCTFontFeatureTypeIdentifierKey;
+		p.tagType = kCFNumberSInt16Type;
+		p.tagValue = (const SInt16 *) (&type);
+		p.valueKey = kCTFontFeatureSelectorIdentifierKey;
+		p.valueType = kCFNumberSInt16Type;
+		p.valueValue = (const SInt16 *) (&selector);
+		addCTFeatureEntry(&p);
+	});
+	return uiForEachContinue;
+}
+
+// TODO find out which fonts differ in AAT small caps and test them with this
+static uiForEach otfArrayForEachOT(const uiOpenTypeFeatures *otf, char a, char b, char c, char d, uint32_t value, void *data)
+{
+	struct addCTFeatureEntryParams p;
+	char tagcstr[5];
+	CFStringRef tagstr;
+
+	p.array = (CFMutableArrayRef) data;
+
+	p.tagKey = *uiprivFUTURE_kCTFontOpenTypeFeatureTag;
+	p.tagIsNumber = NO;
+	tagcstr[0] = a;
+	tagcstr[1] = b;
+	tagcstr[2] = c;
+	tagcstr[3] = d;
+	tagcstr[4] = '\0';
+	tagstr = CFStringCreateWithCString(NULL, tagcstr, kCFStringEncodingUTF8);
+	if (tagstr == NULL) {
+		// TODO
+	}
+	p.tagValue = tagstr;
+
+	p.valueKey = *uiprivFUTURE_kCTFontOpenTypeFeatureValue;
+	p.valueType = kCFNumberSInt32Type;
+	p.valueValue = (const SInt32 *) (&value);
+	addCTFeatureEntry(&p);
+
+	CFRelease(tagstr);
+	return uiForEachContinue;
+}
+
+CFArrayRef uiprivOpenTypeFeaturesToCTFeatures(const uiOpenTypeFeatures *otf)
+{
+	CFMutableArrayRef array;
+	uiOpenTypeFeaturesForEachFunc f;
+
+	array = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
+	if (array == NULL) {
+		// TODO
+	}
+	f = otfArrayForEachAAT;
+	if (uiprivFUTURE_kCTFontOpenTypeFeatureTag != NULL && uiprivFUTURE_kCTFontOpenTypeFeatureValue != NULL)
+		f = otfArrayForEachOT;
+	uiOpenTypeFeaturesForEach(otf, f, array);
+	return array;
+}