1 /*
2 * Copyright (C) 2011 Brent Fulgham
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20
21 #include "config.h"
22 #include "platform/fonts/FontPlatformData.h"
23
24 #include "SkTypeface.h"
25 #include "platform/fonts/harfbuzz/HarfBuzzFace.h"
26 #include "wtf/HashMap.h"
27 #include "wtf/text/StringHash.h"
28 #include "wtf/text/WTFString.h"
29
30 #if OS(MACOSX)
31 #include "third_party/skia/include/ports/SkTypeface_mac.h"
32 #endif
33
34 using namespace std;
35
36 namespace blink {
37
FontPlatformData(WTF::HashTableDeletedValueType)38 FontPlatformData::FontPlatformData(WTF::HashTableDeletedValueType)
39 : m_typeface(nullptr)
40 #if !OS(WIN)
41 , m_family(CString())
42 #endif
43 , m_textSize(0)
44 , m_syntheticBold(false)
45 , m_syntheticItalic(false)
46 , m_orientation(Horizontal)
47 #if OS(MACOSX)
48 , m_isColorBitmapFont(false)
49 , m_isCompositeFontReference(false)
50 #endif
51 , m_widthVariant(RegularWidth)
52 #if OS(MACOSX)
53 , m_font(nullptr)
54 #else
55 , m_style(FontRenderStyle())
56 #endif
57 , m_isHashTableDeletedValue(true)
58 #if OS(WIN)
59 , m_paintTextFlags(0)
60 , m_useSubpixelPositioning(false)
61 , m_minSizeForAntiAlias(0)
62 , m_minSizeForSubpixel(0)
63 #endif
64 {
65 }
66
FontPlatformData()67 FontPlatformData::FontPlatformData()
68 : m_typeface(nullptr)
69 #if !OS(WIN)
70 , m_family(CString())
71 #endif
72 , m_textSize(0)
73 , m_syntheticBold(false)
74 , m_syntheticItalic(false)
75 , m_orientation(Horizontal)
76 #if OS(MACOSX)
77 , m_isColorBitmapFont(false)
78 , m_isCompositeFontReference(false)
79 #endif
80 , m_widthVariant(RegularWidth)
81 #if OS(MACOSX)
82 , m_font(nullptr)
83 #else
84 , m_style(FontRenderStyle())
85 #endif
86 , m_isHashTableDeletedValue(false)
87 #if OS(WIN)
88 , m_paintTextFlags(0)
89 , m_useSubpixelPositioning(false)
90 , m_minSizeForAntiAlias(0)
91 , m_minSizeForSubpixel(0)
92 #endif
93 {
94 }
95
FontPlatformData(float size,bool syntheticBold,bool syntheticItalic,FontOrientation orientation,FontWidthVariant widthVariant)96 FontPlatformData::FontPlatformData(float size, bool syntheticBold, bool syntheticItalic, FontOrientation orientation, FontWidthVariant widthVariant)
97 : m_typeface(nullptr)
98 #if !OS(WIN)
99 , m_family(CString())
100 #endif
101 , m_textSize(size)
102 , m_syntheticBold(syntheticBold)
103 , m_syntheticItalic(syntheticItalic)
104 , m_orientation(orientation)
105 #if OS(MACOSX)
106 , m_isColorBitmapFont(false)
107 , m_isCompositeFontReference(false)
108 #endif
109 , m_widthVariant(widthVariant)
110 #if OS(MACOSX)
111 , m_font(nullptr)
112 #else
113 , m_style(FontRenderStyle())
114 #endif
115 , m_isHashTableDeletedValue(false)
116 #if OS(WIN)
117 , m_paintTextFlags(0)
118 , m_useSubpixelPositioning(false)
119 , m_minSizeForAntiAlias(0)
120 , m_minSizeForSubpixel(0)
121 #endif
122 {
123 }
124
FontPlatformData(const FontPlatformData & source)125 FontPlatformData::FontPlatformData(const FontPlatformData& source)
126 : m_typeface(source.m_typeface)
127 #if !OS(WIN)
128 , m_family(source.m_family)
129 #endif
130 , m_textSize(source.m_textSize)
131 , m_syntheticBold(source.m_syntheticBold)
132 , m_syntheticItalic(source.m_syntheticItalic)
133 , m_orientation(source.m_orientation)
134 #if OS(MACOSX)
135 , m_isColorBitmapFont(source.m_isColorBitmapFont)
136 , m_isCompositeFontReference(source.m_isCompositeFontReference)
137 #endif
138 , m_widthVariant(source.m_widthVariant)
139 #if !OS(MACOSX)
140 , m_style(source.m_style)
141 #endif
142 , m_harfBuzzFace(nullptr)
143 , m_isHashTableDeletedValue(false)
144 #if OS(WIN)
145 , m_paintTextFlags(source.m_paintTextFlags)
146 , m_useSubpixelPositioning(source.m_useSubpixelPositioning)
147 , m_minSizeForAntiAlias(source.m_minSizeForAntiAlias)
148 , m_minSizeForSubpixel(source.m_minSizeForSubpixel)
149 #endif
150 {
151 #if OS(MACOSX)
152 platformDataInit(source);
153 #endif
154 }
155
156
157 #if OS(MACOSX)
FontPlatformData(CGFontRef cgFont,float size,bool syntheticBold,bool syntheticItalic,FontOrientation orientation,FontWidthVariant widthVariant)158 FontPlatformData::FontPlatformData(CGFontRef cgFont, float size, bool syntheticBold, bool syntheticItalic, FontOrientation orientation, FontWidthVariant widthVariant)
159 : m_typeface(nullptr)
160 , m_family(CString())
161 , m_textSize(size)
162 , m_syntheticBold(syntheticBold)
163 , m_syntheticItalic(syntheticItalic)
164 , m_orientation(orientation)
165 , m_isColorBitmapFont(false)
166 , m_isCompositeFontReference(false)
167 , m_widthVariant(widthVariant)
168 , m_font(nullptr)
169 , m_cgFont(cgFont)
170 , m_isHashTableDeletedValue(false)
171 {
172 }
173
174 #else
175
FontPlatformData(PassRefPtr<SkTypeface> tf,const char * family,float textSize,bool syntheticBold,bool syntheticItalic,FontOrientation orientation,bool subpixelTextPosition)176 FontPlatformData::FontPlatformData(PassRefPtr<SkTypeface> tf, const char* family, float textSize, bool syntheticBold, bool syntheticItalic, FontOrientation orientation, bool subpixelTextPosition)
177 : m_typeface(tf)
178 #if !OS(WIN)
179 , m_family(family)
180 #endif
181 , m_textSize(textSize)
182 , m_syntheticBold(syntheticBold)
183 , m_syntheticItalic(syntheticItalic)
184 , m_orientation(orientation)
185 , m_widthVariant(RegularWidth)
186 , m_isHashTableDeletedValue(false)
187 #if OS(WIN)
188 , m_paintTextFlags(0)
189 , m_useSubpixelPositioning(subpixelTextPosition)
190 , m_minSizeForAntiAlias(0)
191 , m_minSizeForSubpixel(0)
192 #endif
193 {
194 querySystemForRenderStyle(subpixelTextPosition);
195 }
196
197
FontPlatformData(const FontPlatformData & src,float textSize)198 FontPlatformData::FontPlatformData(const FontPlatformData& src, float textSize)
199 : m_typeface(src.m_typeface)
200 #if !OS(WIN)
201 , m_family(src.m_family)
202 #endif
203 , m_textSize(textSize)
204 , m_syntheticBold(src.m_syntheticBold)
205 , m_syntheticItalic(src.m_syntheticItalic)
206 , m_orientation(src.m_orientation)
207 , m_widthVariant(RegularWidth)
208 , m_harfBuzzFace(nullptr)
209 , m_isHashTableDeletedValue(false)
210 #if OS(WIN)
211 , m_paintTextFlags(src.m_paintTextFlags)
212 , m_useSubpixelPositioning(src.m_useSubpixelPositioning)
213 , m_minSizeForAntiAlias(src.m_minSizeForAntiAlias)
214 , m_minSizeForSubpixel(src.m_minSizeForSubpixel)
215 #endif
216 {
217 querySystemForRenderStyle(FontDescription::subpixelPositioning());
218 }
219 #endif
220
~FontPlatformData()221 FontPlatformData::~FontPlatformData()
222 {
223 #if OS(MACOSX)
224 if (m_font)
225 CFRelease(m_font);
226 #endif
227 }
228
operator =(const FontPlatformData & other)229 const FontPlatformData& FontPlatformData::operator=(const FontPlatformData& other)
230 {
231 // Check for self-assignment.
232 if (this == &other)
233 return *this;
234
235 m_typeface = other.m_typeface;
236 #if !OS(WIN)
237 m_family = other.m_family;
238 #endif
239 m_textSize = other.m_textSize;
240 m_syntheticBold = other.m_syntheticBold;
241 m_syntheticItalic = other.m_syntheticItalic;
242 m_harfBuzzFace = nullptr;
243 m_orientation = other.m_orientation;
244 m_widthVariant = other.m_widthVariant;
245 #if OS(MACOSX)
246 m_isColorBitmapFont = other.m_isColorBitmapFont;
247 m_isCompositeFontReference = other.m_isCompositeFontReference;
248 #else
249 m_style = other.m_style;
250 #endif
251 m_widthVariant = other.m_widthVariant;
252
253 #if OS(WIN)
254 m_paintTextFlags = 0;
255 m_minSizeForAntiAlias = other.m_minSizeForAntiAlias;
256 m_minSizeForSubpixel = other.m_minSizeForSubpixel;
257 m_useSubpixelPositioning = other.m_useSubpixelPositioning;
258 #endif
259
260 #if OS(MACOSX)
261 return platformDataAssign(other);
262 #else
263 return *this;
264 #endif
265 }
266
operator ==(const FontPlatformData & a) const267 bool FontPlatformData::operator==(const FontPlatformData& a) const
268 {
269 // If either of the typeface pointers are null then we test for pointer
270 // equality. Otherwise, we call SkTypeface::Equal on the valid pointers.
271 bool typefacesEqual = false;
272 #if !OS(MACOSX)
273 if (!m_typeface || !a.m_typeface)
274 typefacesEqual = m_typeface == a.m_typeface;
275 else
276 typefacesEqual = SkTypeface::Equal(m_typeface.get(), a.m_typeface.get());
277 #else
278 if (m_font || a.m_font)
279 typefacesEqual = m_font == a.m_font;
280 else
281 typefacesEqual = m_cgFont == a.m_cgFont;
282 #endif
283
284 return typefacesEqual
285 && m_textSize == a.m_textSize
286 && m_isHashTableDeletedValue == a.m_isHashTableDeletedValue
287 && m_syntheticBold == a.m_syntheticBold
288 && m_syntheticItalic == a.m_syntheticItalic
289 && m_orientation == a.m_orientation
290 #if !OS(MACOSX)
291 && m_style == a.m_style
292 #else
293 && m_isColorBitmapFont == a.m_isColorBitmapFont
294 && m_isCompositeFontReference == a.m_isCompositeFontReference
295 #endif
296 && m_widthVariant == a.m_widthVariant;
297 }
298
uniqueID() const299 SkFontID FontPlatformData::uniqueID() const
300 {
301 return typeface()->uniqueID();
302 }
303
fontFamilyName() const304 String FontPlatformData::fontFamilyName() const
305 {
306 // FIXME(crbug.com/326582): come up with a proper way of handling SVG.
307 if (!this->typeface())
308 return "";
309 SkTypeface::LocalizedStrings* fontFamilyIterator = this->typeface()->createFamilyNameIterator();
310 SkTypeface::LocalizedString localizedString;
311 while (fontFamilyIterator->next(&localizedString) && !localizedString.fString.size()) { }
312 fontFamilyIterator->unref();
313 return String(localizedString.fString.c_str());
314 }
315
isFixedPitch() const316 bool FontPlatformData::isFixedPitch() const
317 {
318 return typeface() && typeface()->isFixedPitch();
319 }
320
typeface() const321 SkTypeface* FontPlatformData::typeface() const
322 {
323 #if OS(MACOSX)
324 if (!m_typeface)
325 m_typeface = adoptRef(SkCreateTypefaceFromCTFont(ctFont()));
326 #endif
327 return m_typeface.get();
328 }
329
harfBuzzFace() const330 HarfBuzzFace* FontPlatformData::harfBuzzFace() const
331 {
332 #if OS(MACOSX)
333 CTFontRef font = ctFont();
334 // Keeping the decision not to pass AAT font to HarfBuzz for now,
335 // until we switch to HarfBuzz as a shaper for all cases.
336 if (isAATFont(font))
337 return 0;
338 #endif
339 if (!m_harfBuzzFace)
340 m_harfBuzzFace = HarfBuzzFace::create(const_cast<FontPlatformData*>(this), uniqueID());
341
342 return m_harfBuzzFace.get();
343 }
344
345 } // namespace blink
346