1 /*
2 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.javafx.font.coretext;
27
28 import com.sun.javafx.font.DisposerRecord;
29 import com.sun.javafx.font.FontResource;
30 import com.sun.javafx.font.FontStrikeDesc;
31 import com.sun.javafx.font.Glyph;
32 import com.sun.javafx.font.PrismFontFactory;
33 import com.sun.javafx.font.PrismFontStrike;
34 import com.sun.javafx.geom.Path2D;
35 import com.sun.javafx.geom.Point2D;
36 import com.sun.javafx.geom.transform.BaseTransform;
37
38 class CTFontStrike extends PrismFontStrike<CTFontFile> {
39
40 private long fontRef;
41 CGAffineTransform matrix;
42 /* CoreText uses different precision for subpixel text according
43 * to the font size. By observation, font sizes smaller than 12
44 * have 4 subpixel positions. Between 12 and 17 it decreases to 3.
45 * Between 18 and 33 it is only 2. Above 33 it rounds all positions
46 * to integral values.
47 */
48 static final float SUBPIXEL4_SIZE = 12;
49 static final float SUBPIXEL3_SIZE = 18;
50 static final float SUBPIXEL2_SIZE = 34;
51 private static final boolean SUBPIXEL;
52 static {
53 int mode = PrismFontFactory.getFontFactory().getSubPixelMode();
54 SUBPIXEL = (mode & PrismFontFactory.SUB_PIXEL_ON) != 0;
55 }
56
57 CTFontStrike(CTFontFile fontResource, float size,
58 BaseTransform graphicsTransform, int aaMode,
59 FontStrikeDesc desc) {
60 super(fontResource, size, graphicsTransform, aaMode, desc);
61 float maxDim = PrismFontFactory.getFontSizeLimit();
62 if (graphicsTransform.isTranslateOrIdentity()) {
63 drawShapes = size > maxDim;
64 } else {
65 BaseTransform tx2d = getTransform();
66 matrix = new CGAffineTransform();
67 matrix.a = tx2d.getMxx();
68 matrix.b = -tx2d.getMyx(); /*Inverted coordinates system */
69 matrix.c = -tx2d.getMxy(); /*Inverted coordinates system */
70 matrix.d = tx2d.getMyy();
71
72 if (Math.abs(matrix.a * size) > maxDim ||
73 Math.abs(matrix.b * size) > maxDim ||
74 Math.abs(matrix.c * size) > maxDim ||
75 Math.abs(matrix.d * size) > maxDim)
76 {
77 drawShapes = true;
78 }
79 }
80
81 long psNameRef = OS.CFStringCreate(fontResource.getPSName());
82 if (psNameRef != 0) {
83 long fileNameRef = OS.CFStringCreate(fontResource.getFileName());
84 if (fileNameRef != 0) {
85 fontRef = OS.CTFontCreate(fileNameRef, psNameRef, size, matrix);
86 OS.CFRelease(fileNameRef);
87 }
88 OS.CFRelease(psNameRef);
89 }
90 if (fontRef == 0) {
91 if (PrismFontFactory.debugFonts) {
92 System.err.println("Failed to create CTFont for " + this);
93 }
94 }
95 }
96
97 long getFontRef() {
98 return fontRef;
99 }
100
101 @Override protected DisposerRecord createDisposer(FontStrikeDesc desc) {
102 CTFontFile fontResource = getFontResource();
103 return new CTStrikeDisposer(fontResource, desc, fontRef);
104 }
105
106 @Override protected Glyph createGlyph(int glyphCode) {
107 return new CTGlyph(this, glyphCode, drawShapes);
108 }
109
110 @Override
111 public int getQuantizedPosition(Point2D point) {
112 if (SUBPIXEL && matrix == null) {
113 /* Prism only produces 3 position, so for sizes smaller than 12 use
114 * Coretext for LCD and grayscale text
115 */
116 if (getSize() < SUBPIXEL4_SIZE) {
117 float subPixelX = point.x;
118 point.x = (int) point.x;
119 subPixelX -= point.x;
120 point.y = (float) Math.round(point.y);
121 if (subPixelX >= 0.75f) return 3;
122 if (subPixelX >= 0.50f) return 2;
123 if (subPixelX >= 0.25f) return 1;
124 return 0;
125 }
126 if (getAAMode() == FontResource.AA_GREYSCALE) {
127 if (getSize() < SUBPIXEL3_SIZE) {
128 float subPixelX = point.x;
129 point.x = (int) point.x;
130 subPixelX -= point.x;
131 point.y = (float) Math.round(point.y);
132 if (subPixelX >= 0.66f) return 2;
133 if (subPixelX >= 0.33f) return 1;
134 return 0;
135 }
136 if (getSize() < SUBPIXEL2_SIZE) {
137 float subPixelX = point.x;
138 point.x = (int) point.x;
139 subPixelX -= point.x;
140 point.y = (float) Math.round(point.y);
141 if (subPixelX >= 0.5f) return 1;
142 }
143 return 0;
144 }
145 }
146 return super.getQuantizedPosition(point);
147 }
148
149 float getSubPixelPosition(int index) {
150 if (index == 0) return 0;
151 float size = getSize();
152 if (size < SUBPIXEL4_SIZE) {
153 if (index == 3) return 0.75f;
154 if (index == 2) return 0.50f;
155 if (index == 1) return 0.25f;
156 return 0;
157 }
158 if (getAAMode() == FontResource.AA_LCD) return 0;
159 if (size < SUBPIXEL3_SIZE) {
160 if (index == 2) return 0.66f;
161 if (index == 1) return 0.33f;
162 return 0;
163 }
164 if (size < SUBPIXEL2_SIZE) {
165 if (index == 1) return 0.50f;
166 }
167 return 0;
168 }
169
170 boolean isSubPixelGlyph() {
171 return SUBPIXEL && matrix == null;
172 }
173
174 @Override protected Path2D createGlyphOutline(int glyphCode) {
175 CTFontFile fontResource = getFontResource();
176 return fontResource.getGlyphOutline(glyphCode, getSize());
177 }
178
179 CGRect getBBox(int glyphCode) {
180 CTFontFile fontResource = getFontResource();
181 return fontResource.getBBox(glyphCode, getSize());
182 }
183 }