|
1 /* |
|
2 * Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of the License "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - initial contribution. |
|
11 * |
|
12 * Contributors: |
|
13 * |
|
14 * Description: |
|
15 * |
|
16 */ |
|
17 |
|
18 |
|
19 |
|
20 #include "config.h" |
|
21 #include "FontCache.h" |
|
22 #include "FontPlatformData.h" |
|
23 #include "Font.h" |
|
24 #include "StaticObjectsContainer.h" |
|
25 #include "PlatformFontCache.h" |
|
26 #include <../bidi.h> // work around for multiple bidi.h files |
|
27 #include "ZoomFactor.h" |
|
28 #include <e32base.h> |
|
29 #include <e32std.h> |
|
30 #include <w32std.h> |
|
31 #include <COEMAIN.H> |
|
32 #include <fbs.h> |
|
33 #include <FeatMgr.h> |
|
34 #include <Languages.hrh> |
|
35 |
|
36 #include <AknFontAccess.h> |
|
37 #include <AknUtils.h> |
|
38 #include <AknLayoutFont.h> |
|
39 #include <AknFontSpecification.h> |
|
40 |
|
41 // CONSTANTS |
|
42 _LIT( KPlatformDefaultFontFamily, "S60 WebKit" ); |
|
43 |
|
44 namespace WebCore |
|
45 { |
|
46 |
|
47 void FontCache::platformInit() |
|
48 { |
|
49 // don't support Glphy caching in S60, so force to use the complex path |
|
50 Font::setCodePath( Font::Complex ); |
|
51 StaticObjectsContainer::instance()->fontCache()->Initialize(); |
|
52 } |
|
53 |
|
54 const FontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length) |
|
55 { |
|
56 // this function shouldn't be called. |
|
57 __ASSERT_ALWAYS( 0, User::Panic(_L("FontCache:"), 0) ); |
|
58 return 0; |
|
59 } |
|
60 |
|
61 FontPlatformData* FontCache::getSimilarFontPlatformData(const Font& font) |
|
62 { |
|
63 return 0; |
|
64 } |
|
65 |
|
66 FontPlatformData* FontCache::getLastResortFallbackFont(const Font& font) |
|
67 { |
|
68 // the default fallback font |
|
69 return getCachedFontPlatformData(font.fontDescription(), StaticObjectsContainer::instance()->fontCache()->DeviceDefaultFontFamilies()); |
|
70 } |
|
71 |
|
72 FontPlatformData* FontCache::getDeviceDefaultFont(float size) |
|
73 { |
|
74 FontDescription fd; |
|
75 fd.setComputedSize(size); |
|
76 return getCachedFontPlatformData(fd, StaticObjectsContainer::instance()->fontCache()->DeviceDefaultFontFamilies()); |
|
77 } |
|
78 |
|
79 FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family) |
|
80 { |
|
81 PlatformFontCache* platformCache = StaticObjectsContainer::instance()->fontCache(); |
|
82 return new FontPlatformData(platformCache->zoomedFont(fontDescription, 100)); |
|
83 } |
|
84 |
|
85 const AtomicString& FontCache::systemFontFamilyName( const AtomicString& familyName ) |
|
86 { |
|
87 return StaticObjectsContainer::instance()->fontCache()->SystemFontFamily( familyName ); |
|
88 } |
|
89 |
|
90 void PlatformFontCache::Initialize() |
|
91 { |
|
92 iScreenDevice = CCoeEnv::Static()->ScreenDevice(); |
|
93 iFontCache.clear(); |
|
94 |
|
95 // search for scalable fonts only to make lookups faster |
|
96 TInt count(iScreenDevice->NumTypefaces()); |
|
97 for (TInt n=0; n<count; ++n) |
|
98 { |
|
99 TTypefaceSupport typeface; |
|
100 iScreenDevice->TypefaceSupport(typeface, n); |
|
101 if (typeface.iIsScalable) |
|
102 { |
|
103 // count the scalable typefaces |
|
104 ++iTypefaceCount; |
|
105 } |
|
106 } |
|
107 |
|
108 // populate typeface array |
|
109 TInt i=0; |
|
110 iSupportedNames = new AtomicString[iTypefaceCount]; |
|
111 |
|
112 for (TInt n=0; n<count; ++n) |
|
113 { |
|
114 TTypefaceSupport typeface; |
|
115 iScreenDevice->TypefaceSupport(typeface, n); |
|
116 if (typeface.iIsScalable) |
|
117 { |
|
118 iSupportedNames[i] = typeface.iTypeface.iName; |
|
119 ++i; |
|
120 } |
|
121 |
|
122 } |
|
123 |
|
124 } |
|
125 |
|
126 PlatformFontCache::~PlatformFontCache() |
|
127 { |
|
128 Vector<ZoomedSpec>::iterator it = iFontCache.begin(); |
|
129 Vector<ZoomedSpec>::iterator end = iFontCache.end(); |
|
130 for(;it != end; ++it) { |
|
131 ReleaseFont( it->m_font ); |
|
132 it->m_font = 0; |
|
133 } |
|
134 iFontCache.clear(); |
|
135 delete [] iSupportedNames; |
|
136 } |
|
137 |
|
138 const AtomicString& PlatformFontCache::SystemFontFamily( const AtomicString& familyName ) |
|
139 { |
|
140 // first check if we support this font |
|
141 for (TInt n=0; n<iTypefaceCount; ++n) |
|
142 { |
|
143 if (iSupportedNames[n] == familyName ) |
|
144 { |
|
145 return iSupportedNames[n]; |
|
146 } |
|
147 } |
|
148 |
|
149 return DeviceDefaultFontFamilies(); |
|
150 } |
|
151 |
|
152 const AtomicString& PlatformFontCache::DeviceDefaultFontFamilies() |
|
153 { |
|
154 TPtrC font(KPlatformDefaultFontFamily); |
|
155 iDeviceDefaultFont = font; |
|
156 return iDeviceDefaultFont; |
|
157 } |
|
158 |
|
159 CFont* PlatformFontCache::CreateFont(const ZoomedSpec& spec) |
|
160 { |
|
161 CFont* font = 0; |
|
162 |
|
163 Vector<ZoomedSpec>::const_iterator it = iFontCache.begin(); |
|
164 Vector<ZoomedSpec>::const_iterator end = iFontCache.end(); |
|
165 for (;it != end; ++it) { |
|
166 if ((*it) == spec) { |
|
167 font = it->m_font; |
|
168 return font; |
|
169 } |
|
170 } |
|
171 |
|
172 |
|
173 if (spec.m_spec.iTypeface.iName == KPlatformDefaultFontFamily) { |
|
174 // fall back to platform default fonts by using TAknFontFamily |
|
175 font = AknFontAccess::GetClosestFont(*iScreenDevice, spec.m_spec.iFontStyle, spec.m_spec.iHeight * spec.m_zoom/100, (AknFontAccess::TAknFontFamily)0); |
|
176 } |
|
177 else { |
|
178 font = AknFontAccess::GetClosestFont(*iScreenDevice, spec.m_spec.iFontStyle, spec.m_spec.iHeight * spec.m_zoom/100, spec.m_spec.iTypeface.iName); |
|
179 } |
|
180 |
|
181 |
|
182 if (font) { |
|
183 ZoomedSpec newSpec(spec); |
|
184 newSpec.m_font = font; |
|
185 iFontCache.append(newSpec); |
|
186 } |
|
187 |
|
188 return font; |
|
189 } |
|
190 |
|
191 void PlatformFontCache::ReleaseFont(CFont* font) |
|
192 { |
|
193 iScreenDevice->ReleaseFont(font); |
|
194 } |
|
195 |
|
196 void PlatformFontCache::setFontZoomFactor(int zoom) |
|
197 { |
|
198 // adjust the zoom factor based on fonts |
|
199 iFontZoomFactor = zoom; |
|
200 } |
|
201 |
|
202 TFontSpec PlatformFontCache::fontSpecInTwips(const FontDescription& fontDescription) |
|
203 { |
|
204 TInt fSize = fontDescription.computedPixelSize(); |
|
205 |
|
206 if (fSize == 0) fSize = 12; |
|
207 TInt twipSize = iScreenDevice->VerticalPixelsToTwips(fSize); |
|
208 |
|
209 // convert to platform-supported font family |
|
210 TPtrC fPtr( SystemFontFamily( fontDescription.family().family() ) ); |
|
211 |
|
212 |
|
213 TFontSpec fontSpec(fPtr, twipSize); |
|
214 fontSpec.iFontStyle.SetStrokeWeight(fontDescription.bold() ? EStrokeWeightBold : EStrokeWeightNormal); |
|
215 fontSpec.iFontStyle.SetPosture(fontDescription.italic() ? EPostureItalic : EPostureUpright); |
|
216 fontSpec.iFontStyle.SetBitmapType(EAntiAliasedGlyphBitmap); // enable anti-aliasing |
|
217 |
|
218 if (fontDescription.bold() && fPtr==KPlatformDefaultFontFamily) { |
|
219 fontSpec.iFontStyle.SetStrokeWeight(EStrokeWeightBold); |
|
220 } |
|
221 |
|
222 return fontSpec; |
|
223 } |
|
224 |
|
225 |
|
226 CFont* PlatformFontCache::zoomedFont(const FontDescription& fontDescription, int zoom) |
|
227 { |
|
228 ZoomedSpec spec(fontSpecInTwips(fontDescription), zoom, 0); |
|
229 return CreateFont(spec); |
|
230 } |
|
231 |
|
232 } |
|
233 |