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/*
* Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package com.sun.javafx.font.coretext;
import com.sun.javafx.font.CompositeFontResource;
import com.sun.javafx.font.CompositeStrike;
import com.sun.javafx.font.FontStrike;
import com.sun.javafx.font.PGFont;
import com.sun.javafx.font.PrismFontFactory;
import com.sun.javafx.text.GlyphLayout;
import com.sun.javafx.text.TextRun;
class CTGlyphLayout extends GlyphLayout {
private long createCTLine(long fontRef, char[] chars, boolean rtl,
int start, int length) {
/* Use CoreText to analize the run */
long alloc = OS.kCFAllocatorDefault();
long textRef = OS.CFStringCreateWithCharacters(alloc, chars, start, length);
long lineRef = 0;
if (textRef != 0) {
long attributes = OS.CFDictionaryCreateMutable(alloc, 4,
OS.kCFTypeDictionaryKeyCallBacks(),
OS.kCFTypeDictionaryValueCallBacks());
if (attributes != 0) {
OS.CFDictionaryAddValue(attributes, OS.kCTFontAttributeName(), fontRef);
if (rtl) {
long paragraphStyleRef = OS.CTParagraphStyleCreate(OS.kCTWritingDirectionRightToLeft);
if (paragraphStyleRef != 0) {
OS.CFDictionaryAddValue(attributes, OS.kCTParagraphStyleAttributeName(), paragraphStyleRef);
OS.CFRelease(paragraphStyleRef);
}
}
/* Note that by default CoreText will apply kerning depending on the font*/
long attString = OS.CFAttributedStringCreate(alloc, textRef, attributes);
if (attString != 0) {
lineRef = OS.CTLineCreateWithAttributedString(attString);
OS.CFRelease(attString);
}
OS.CFRelease(attributes);
}
OS.CFRelease(textRef);
}
return lineRef;
}
private int getFontSlot(long runRef, CompositeFontResource fr, String name, int slot) {
long runAttrs = OS.CTRunGetAttributes(runRef);
if (runAttrs == 0) return -1;
long actualFont = OS.CFDictionaryGetValue(runAttrs, OS.kCTFontAttributeName());
if (actualFont == 0) return -1;
/* Use the display name from the kCTFontDisplayNameAttribute attribute
* instead of CTFontCopyDisplayName() to avoid localized names*/
String fontName = OS.CTFontCopyAttributeDisplayName(actualFont);
if (fontName == null) return -1;
if (!fontName.equalsIgnoreCase(name)) {
if (fr == null) return -1;
slot = fr.getSlotForFont(fontName);
if (PrismFontFactory.debugFonts) {
System.err.println("\tFallback font= "+ fontName + " slot=" + slot);
}
}
return slot;
}
public void layout(TextRun run, PGFont font, FontStrike strike, char[] text) {
int baseSlot = 0;
CompositeFontResource composite = null;
if (strike instanceof CompositeStrike) {
composite = (CompositeFontResource)strike.getFontResource();
baseSlot = getInitialSlot(composite);
strike = ((CompositeStrike)strike).getStrikeSlot(baseSlot);
}
float size = strike.getSize();
String fontName = strike.getFontResource().getFullName();
long fontRef = ((CTFontStrike)strike).getFontRef();
if (fontRef == 0) return;
boolean rtl = (run.getLevel() & 1) != 0;
long lineRef = createCTLine(fontRef, text, rtl, run.getStart(), run.getLength());
if (lineRef == 0) return;
long runs = OS.CTLineGetGlyphRuns(lineRef);
if (runs != 0) {
int glyphCount = (int)OS.CTLineGetGlyphCount(lineRef);
int[] glyphs = new int[glyphCount];
float[] positions = new float[glyphCount * 2 + 2];
int[] indices = new int[glyphCount];
long runCount = OS.CFArrayGetCount(runs);
int glyphStart = 0, posStart = 0, indicesStart = 0;
for (int i = 0; i < runCount; i++) {
long runRef = OS.CFArrayGetValueAtIndex(runs, i);
if (runRef == 0) continue;
int slot = getFontSlot(runRef, composite, fontName, baseSlot);
if (slot != -1) {
glyphStart += OS.CTRunGetGlyphs(runRef, slot << 24, glyphStart, glyphs);
} else {
glyphStart += OS.CTRunGetGlyphs(runRef, 0, glyphStart, glyphs);
}
if (size > 0) {
posStart += OS.CTRunGetPositions(runRef, posStart, positions);
}
indicesStart += OS.CTRunGetStringIndices(runRef, indicesStart, indices);
}
if (size > 0) {
positions[posStart] = (float)OS.CTLineGetTypographicBounds(lineRef);
}
run.shape(glyphCount, glyphs, positions, indices);
}
OS.CFRelease(lineRef);
}
}
