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This is a backport of OpenJFX 8 to run on Java 7.
The newest version!
/*
* Copyright (c) 2013, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.javafx.font.coretext;
import com.sun.javafx.font.FontResource;
import com.sun.javafx.font.Glyph;
import com.sun.javafx.geom.RectBounds;
import com.sun.javafx.geom.Shape;
class CTGlyph implements Glyph {
private CTFontStrike strike;
private int glyphCode;
private CGRect bounds;
private double xAdvance;
private double yAdvance;
private boolean drawShapes;
/* Always using BRGA context has the same performance as gray */
private static boolean LCD_CONTEXT = true;
private static boolean CACHE_CONTEXT = true;
private static long cachedContextRef;
private static final int BITMAP_WIDTH = 256;
private static final int BITMAP_HEIGHT = 256;
private static final long GRAY_COLORSPACE = OS.CGColorSpaceCreateDeviceGray();
private static final long RGB_COLORSPACE = OS.CGColorSpaceCreateDeviceRGB();
CTGlyph(CTFontStrike strike, int glyphCode, boolean drawShapes) {
this.strike = strike;
this.glyphCode = glyphCode;
this.drawShapes = drawShapes;
}
@Override public int getGlyphCode() {
return glyphCode;
}
/* Note, according to javadoc these bounds should be
* in user space but T2K uses device space.
*/
@Override public RectBounds getBBox() {
/* IN T2k this is the bounds of the glyph path see GeneralPath.cpp */
CGRect rect = strike.getBBox(glyphCode);
return new RectBounds((float)rect.origin.x,
(float)rect.origin.y,
(float)(rect.origin.x + rect.size.width),
(float)(rect.origin.y + rect.size.height));
}
private void checkBounds() {
if (bounds != null) return;
long fontRef = strike.getFontRef();
int orientation = OS.kCTFontOrientationDefault;
CGSize size = new CGSize();
OS.CTFontGetAdvancesForGlyphs(fontRef, orientation, (short)glyphCode, size, 1);
xAdvance = size.width;
yAdvance = -size.height; /*Inverted coordinates system */
bounds = new CGRect();
if (drawShapes) return;
/* Avoid CTFontGetBoundingRectsForGlyphs as it is too slow */
// bounds = OS.CTFontGetBoundingRectsForGlyphs(fontRef, orientation, (short)glyphCode, null, 1);
CTFontFile fr = (CTFontFile)strike.getFontResource();
float[] bb = new float[4];
fr.getGlyphBoundingBox((short)glyphCode, strike.getSize(), bb);
bounds.origin.x = bb[0];
bounds.origin.y = bb[1];
bounds.size.width = (bb[2] - bb[0]);
bounds.size.height = (bb[3] - bb[1]);
if (strike.matrix != null) {
/* Need to use the native matrix as it is y up */
OS.CGRectApplyAffineTransform(bounds, strike.matrix);
}
/* The box is increased to capture all fragments from LCD rendering */
bounds.origin.x = (int)Math.floor(bounds.origin.x) - 1;
bounds.origin.y = (int)Math.floor(bounds.origin.y) - 1;
bounds.size.width = (int)Math.ceil(bounds.size.width) + 1 + 1 + 1;
bounds.size.height = (int)Math.ceil(bounds.size.height) + 1 + 1 + 1;
}
@Override public Shape getShape() {
return strike.createGlyphOutline(glyphCode);
}
private long createContext(boolean lcd, int width, int height) {
long space;
int bpc = 8, bpr, flags;
if (lcd) {
space = RGB_COLORSPACE;
bpr = width * 4;
flags = OS.kCGBitmapByteOrder32Host | OS.kCGImageAlphaPremultipliedFirst;
} else {
space = GRAY_COLORSPACE;
bpr = width;
flags = OS.kCGImageAlphaNone;
}
long context = OS.CGBitmapContextCreate(0, width, height, bpc, bpr, space, flags);
boolean subPixel = strike.isSubPixelGlyph();
OS.CGContextSetAllowsFontSmoothing(context, lcd);
OS.CGContextSetAllowsAntialiasing(context, true);
OS.CGContextSetAllowsFontSubpixelPositioning(context, subPixel);
OS.CGContextSetAllowsFontSubpixelQuantization(context, subPixel);
return context;
}
private long getCachedContext(boolean lcd) {
if (cachedContextRef == 0) {
cachedContextRef = createContext(lcd, BITMAP_WIDTH, BITMAP_HEIGHT);
}
return cachedContextRef;
}
private synchronized byte[] getImage(double x, double y, int w, int h,
double subPixelX, double subPixelY) {
if (w == 0 || h == 0) return null;
long fontRef = strike.getFontRef();
boolean lcd = isLCDGlyph();
boolean lcdContext = LCD_CONTEXT || lcd;
CGAffineTransform matrix = strike.matrix;
boolean cache = CACHE_CONTEXT & BITMAP_WIDTH >= w & BITMAP_HEIGHT >= h;
long context = cache ? getCachedContext(lcdContext) :
createContext(lcdContext, w, h);
/* Fill background with white */
OS.CGContextSetRGBFillColor(context, 1, 1, 1, 1);
CGRect rect = new CGRect();
rect.size.width = w;
rect.size.height = h;
OS.CGContextFillRect(context, rect);
CGPoint pt = new CGPoint();
pt.x = x;
pt.y = y;
if (matrix != null) {
/* Need to use the native matrix as it is y up */
OS.CGPointApplyAffineTransform(pt, strike.imatrix);
} else {
if (strike.isSubPixelGlyph()) {
pt.x -= subPixelX;
pt.y -= subPixelY;
}
}
/* Draw the text with black */
OS.CGContextSetRGBFillColor(context, 0, 0, 0, 1);
OS.CTFontDrawGlyphs(fontRef, (short)glyphCode, -pt.x, -pt.y, 1, context);
byte[] imageData;
if (lcd) {
imageData = OS.CGBitmapContextGetData(context, w, h, 24);
} else {
imageData = OS.CGBitmapContextGetData(context, w, h, 8);
}
if (!cache) {
OS.CGContextRelease(context);
}
return imageData;
}
@Override public byte[] getPixelData() {
return getPixelData(0, 0);
}
@Override public byte[] getPixelData(float x, float y) {
checkBounds();
return getImage(bounds.origin.x, bounds.origin.y,
(int)bounds.size.width, (int)bounds.size.height, x, y);
}
@Override public float getAdvance() {
checkBounds();
//TODO should be user space (this method is not used)
return (float)xAdvance;
}
@Override public float getPixelXAdvance() {
checkBounds();
return (float)xAdvance;
}
@Override public float getPixelYAdvance() {
checkBounds();
return (float)yAdvance;
}
@Override public int getWidth() {
checkBounds();
int w = (int)bounds.size.width;
return isLCDGlyph() ? w * 3 : w;
}
@Override public int getHeight() {
checkBounds();
return (int)bounds.size.height;
}
@Override public int getOriginX() {
checkBounds();
return (int)bounds.origin.x;
}
@Override public int getOriginY() {
checkBounds();
int h = (int)bounds.size.height;
int y = (int)bounds.origin.y;
return -h - y; /*Inverted coordinates system */
}
@Override public boolean isLCDGlyph() {
return strike.getAAMode() == FontResource.AA_LCD;
}
}