epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2006 The Android Open Source Project |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 9 | |
| 10 | #include "SkFontHost.h" |
| 11 | #include "SkDescriptor.h" |
| 12 | #include "SkString.h" |
| 13 | #include "SkStream.h" |
| 14 | #include <stdio.h> |
| 15 | |
| 16 | /* define this if we can use mmap() to access fonts from the filesystem */ |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 17 | #define SK_CAN_USE_MMAP |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 18 | |
| 19 | #ifndef SK_FONTPATH |
| 20 | #define SK_FONTPATH "the complete path for a font file" |
| 21 | #endif |
| 22 | |
| 23 | struct FontFaceRec { |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 24 | const char* fFileName; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 25 | uint8_t fFamilyIndex; |
| 26 | SkBool8 fBold; |
| 27 | SkBool8 fItalic; |
| 28 | |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 29 | static const FontFaceRec& FindFace(const FontFaceRec rec[], int count, |
| 30 | int isBold, int isItalic); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 31 | }; |
| 32 | |
| 33 | struct FontFamilyRec { |
| 34 | const FontFaceRec* fFaces; |
| 35 | int fFaceCount; |
| 36 | }; |
| 37 | |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 38 | const FontFaceRec& FontFaceRec::FindFace(const FontFaceRec rec[], int count, |
| 39 | int isBold, int isItalic) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 40 | { |
| 41 | SkASSERT(count > 0); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 42 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 43 | int i; |
| 44 | |
| 45 | // look for an exact match |
| 46 | for (i = 0; i < count; i++) { |
| 47 | if (rec[i].fBold == isBold && rec[i].fItalic == isItalic) |
| 48 | return rec[i]; |
| 49 | } |
| 50 | // look for a match in the bold field |
| 51 | for (i = 0; i < count; i++) { |
| 52 | if (rec[i].fBold == isBold) |
| 53 | return rec[i]; |
| 54 | } |
| 55 | // look for a normal/regular face |
| 56 | for (i = 0; i < count; i++) { |
| 57 | if (!rec[i].fBold && !rec[i].fItalic) |
| 58 | return rec[i]; |
| 59 | } |
| 60 | // give up |
| 61 | return rec[0]; |
| 62 | } |
| 63 | |
| 64 | enum { |
| 65 | DEFAULT_FAMILY_INDEX, |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 66 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 67 | FAMILY_INDEX_COUNT |
| 68 | }; |
| 69 | |
| 70 | static const FontFaceRec gDefaultFaces[] = { |
| 71 | { SK_FONTPATH, DEFAULT_FAMILY_INDEX, 0, 0 } |
| 72 | }; |
| 73 | |
| 74 | // This table must be in the same order as the ..._FAMILY_INDEX enum specifies |
| 75 | static const FontFamilyRec gFamilies[] = { |
| 76 | { gDefaultFaces, SK_ARRAY_COUNT(gDefaultFaces) } |
| 77 | }; |
| 78 | |
| 79 | #define DEFAULT_FAMILY_INDEX DEFAULT_FAMILY_INDEX |
| 80 | #define DEFAULT_FAMILY_FACE_INDEX 0 |
| 81 | |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 82 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 83 | |
| 84 | /* map common "web" font names to our font list */ |
| 85 | |
| 86 | struct FontFamilyMatchRec { |
| 87 | const char* fLCName; |
| 88 | int fFamilyIndex; |
| 89 | }; |
| 90 | |
| 91 | /* This is a table of synonyms for collapsing font names |
| 92 | down to their pseudo-equivalents (i.e. in terms of fonts |
| 93 | we actually have.) |
| 94 | Keep this sorted by the first field so we can do a binary search. |
| 95 | If this gets big, we could switch to a hash... |
| 96 | */ |
| 97 | static const FontFamilyMatchRec gMatches[] = { |
| 98 | #if 0 |
| 99 | { "Ahem", Ahem_FAMILY_INDEX }, |
| 100 | { "arial", SANS_FAMILY_INDEX }, |
| 101 | { "courier", MONO_FAMILY_INDEX }, |
| 102 | { "courier new", MONO_FAMILY_INDEX }, |
| 103 | { "cursive", SERIF_FAMILY_INDEX }, |
| 104 | { "fantasy", SERIF_FAMILY_INDEX }, |
| 105 | { "georgia", SERIF_FAMILY_INDEX }, |
| 106 | { "goudy", SERIF_FAMILY_INDEX }, |
| 107 | { "helvetica", SANS_FAMILY_INDEX }, |
| 108 | { "palatino", SERIF_FAMILY_INDEX }, |
| 109 | { "tahoma", SANS_FAMILY_INDEX }, |
| 110 | { "sans-serif", SANS_FAMILY_INDEX }, |
| 111 | { "serif", SERIF_FAMILY_INDEX }, |
| 112 | { "times", SERIF_FAMILY_INDEX }, |
| 113 | { "times new roman", SERIF_FAMILY_INDEX }, |
| 114 | { "verdana", SANS_FAMILY_INDEX } |
| 115 | #endif |
| 116 | }; |
| 117 | |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 118 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 119 | |
| 120 | #include "SkTSearch.h" |
| 121 | |
| 122 | static bool contains_only_ascii(const char s[]) |
| 123 | { |
| 124 | for (;;) |
| 125 | { |
| 126 | int c = *s++; |
| 127 | if (c == 0) |
| 128 | break; |
| 129 | if ((c >> 7) != 0) |
| 130 | return false; |
| 131 | } |
| 132 | return true; |
| 133 | } |
| 134 | |
| 135 | #define TRACE_FONT_NAME(code) |
| 136 | //#define TRACE_FONT_NAME(code) code |
| 137 | |
| 138 | const FontFamilyRec* find_family_rec(const char target[]) |
| 139 | { |
| 140 | int index; |
| 141 | |
| 142 | // If we're asked for a font name that contains non-ascii, |
| 143 | // 1) SkStrLCSearch can't handle it |
| 144 | // 2) All of our fonts are have ascii names, so... |
| 145 | |
| 146 | TRACE_FONT_NAME(printf("----------------- font request <%s>", target);) |
| 147 | |
| 148 | if (contains_only_ascii(target)) |
| 149 | { |
| 150 | // Search for the font by matching the entire name |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 151 | index = SkStrLCSearch(&gMatches[0].fLCName, SK_ARRAY_COUNT(gMatches), |
| 152 | target, sizeof(gMatches[0])); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 153 | if (index >= 0) |
| 154 | { |
| 155 | TRACE_FONT_NAME(printf(" found %d\n", index);) |
| 156 | return &gFamilies[gMatches[index].fFamilyIndex]; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | // Sniff for key words... |
| 161 | |
| 162 | #if 0 |
| 163 | if (strstr(target, "sans") || strstr(target, "Sans")) |
| 164 | { |
| 165 | TRACE_FONT_NAME(printf(" found sans\n");) |
| 166 | return &gFamilies[SANS_FAMILY_INDEX]; |
| 167 | } |
| 168 | if (strstr(target, "serif") || strstr(target, "Serif")) |
| 169 | { |
| 170 | TRACE_FONT_NAME(printf(" found serif\n");) |
| 171 | return &gFamilies[SERIF_FAMILY_INDEX]; |
| 172 | } |
| 173 | if (strstr(target, "mono") || strstr(target, "Mono")) |
| 174 | { |
| 175 | TRACE_FONT_NAME(printf(" found mono\n");) |
| 176 | return &gFamilies[MONO_FAMILY_INDEX]; |
| 177 | } |
| 178 | #endif |
| 179 | |
| 180 | TRACE_FONT_NAME(printf(" use default\n");) |
| 181 | // we give up, just give them the default font |
| 182 | return &gFamilies[DEFAULT_FAMILY_INDEX]; |
| 183 | } |
| 184 | |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 185 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 186 | |
| 187 | static const FontFaceRec* get_default_face() |
| 188 | { |
| 189 | return &gFamilies[DEFAULT_FAMILY_INDEX].fFaces[DEFAULT_FAMILY_FACE_INDEX]; |
| 190 | } |
| 191 | |
reed@android.com | 563771e | 2009-01-14 14:16:46 +0000 | [diff] [blame] | 192 | static SkTypeface::Style get_style(const FontFaceRec& face) { |
| 193 | int style = 0; |
| 194 | if (face.fBold) { |
| 195 | style |= SkTypeface::kBold; |
| 196 | } |
| 197 | if (face.fItalic) { |
| 198 | style |= SkTypeface::kItalic; |
| 199 | } |
| 200 | return static_cast<SkTypeface::Style>(style); |
| 201 | } |
| 202 | |
| 203 | // This global const reference completely identifies the face |
| 204 | static uint32_t get_id(const FontFaceRec& face) { |
| 205 | uintptr_t id = reinterpret_cast<uintptr_t>(&face); |
| 206 | return static_cast<uint32_t>(id); |
| 207 | } |
| 208 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 209 | class FontFaceRec_Typeface : public SkTypeface { |
| 210 | public: |
reed@android.com | 563771e | 2009-01-14 14:16:46 +0000 | [diff] [blame] | 211 | FontFaceRec_Typeface(const FontFaceRec& face) : |
| 212 | SkTypeface(get_style(face), get_id(face)), |
| 213 | fFace(face) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 214 | { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | // This global const reference completely identifies the face |
| 218 | const FontFaceRec& fFace; |
| 219 | }; |
| 220 | |
| 221 | static const FontFaceRec* get_typeface_rec(const SkTypeface* face) |
| 222 | { |
| 223 | const FontFaceRec_Typeface* f = (FontFaceRec_Typeface*)face; |
| 224 | return f ? &f->fFace : get_default_face(); |
| 225 | } |
| 226 | |
| 227 | static uint32_t ptr2uint32(const void* p) |
| 228 | { |
| 229 | // cast so we avoid warnings on 64bit machines that a ptr difference |
| 230 | // which might be 64bits is being trucated from 64 to 32 |
| 231 | return (uint32_t)((char*)p - (char*)0); |
| 232 | } |
| 233 | |
reed@android.com | b1d9d2e | 2009-03-04 17:37:51 +0000 | [diff] [blame] | 234 | SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace, |
| 235 | const char familyName[], |
| 236 | SkTypeface::Style style) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 237 | { |
| 238 | const FontFamilyRec* family; |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 239 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 240 | if (familyFace) |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 241 | family = &gFamilies[ |
| 242 | ((FontFaceRec_Typeface*)familyFace)->fFace.fFamilyIndex]; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 243 | else if (familyName) |
| 244 | family = find_family_rec(familyName); |
| 245 | else |
| 246 | family = &gFamilies[DEFAULT_FAMILY_INDEX]; |
| 247 | |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 248 | const FontFaceRec& face = FontFaceRec::FindFace(family->fFaces, |
| 249 | family->fFaceCount, |
| 250 | (style & SkTypeface::kBold) != 0, |
| 251 | (style & SkTypeface::kItalic) != 0); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 252 | |
| 253 | // if we're returning our input parameter, no need to create a new instance |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 254 | if (familyFace != NULL && |
| 255 | &((FontFaceRec_Typeface*)familyFace)->fFace == &face) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 256 | { |
| 257 | familyFace->ref(); |
| 258 | return (SkTypeface*)familyFace; |
| 259 | } |
| 260 | return SkNEW_ARGS(FontFaceRec_Typeface, (face)); |
| 261 | } |
| 262 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 263 | // static |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 264 | SkAdvancedTypefaceMetrics* SkFontHost::GetAdvancedTypefaceMetrics( |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 265 | uint32_t fontID, |
tomhudson@google.com | eebd62a | 2012-03-23 15:38:28 +0000 | [diff] [blame] | 266 | SkAdvancedTypefaceMetrics::PerGlyphInfo perGlyphInfo, |
| 267 | const uint32_t* glyphIDs, |
| 268 | uint32_t glyphIDsCount) { |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 269 | sk_throw(); // not implemented |
| 270 | return NULL; |
| 271 | } |
| 272 | |
reed@android.com | b1d9d2e | 2009-03-04 17:37:51 +0000 | [diff] [blame] | 273 | SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream) { |
reed@android.com | 563771e | 2009-01-14 14:16:46 +0000 | [diff] [blame] | 274 | sk_throw(); // not implemented |
| 275 | return NULL; |
| 276 | } |
| 277 | |
| 278 | SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[]) { |
| 279 | sk_throw(); // not implemented |
| 280 | return NULL; |
| 281 | } |
| 282 | |
reed@android.com | 563771e | 2009-01-14 14:16:46 +0000 | [diff] [blame] | 283 | SkStream* SkFontHost::OpenStream(uint32_t fontID) { |
| 284 | sk_throw(); // not implemented |
| 285 | return NULL; |
| 286 | } |
| 287 | |
reed@android.com | ac98154 | 2009-07-31 16:17:01 +0000 | [diff] [blame] | 288 | size_t SkFontHost::GetFileName(SkFontID fontID, char path[], size_t length, |
| 289 | int32_t* index) { |
| 290 | SkDebugf("SkFontHost::GetFileName unimplemented\n"); |
| 291 | return 0; |
| 292 | } |
| 293 | |
reed@android.com | 563771e | 2009-01-14 14:16:46 +0000 | [diff] [blame] | 294 | void SkFontHost::Serialize(const SkTypeface* tface, SkWStream* stream) { |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 295 | const FontFaceRec* face = &((const FontFaceRec_Typeface*)tface)->fFace; |
reed@android.com | 563771e | 2009-01-14 14:16:46 +0000 | [diff] [blame] | 296 | stream->write(face, sizeof(face)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 297 | } |
| 298 | |
reed@android.com | 563771e | 2009-01-14 14:16:46 +0000 | [diff] [blame] | 299 | SkTypeface* SkFontHost::Deserialize(SkStream* stream) { |
| 300 | const FontFaceRec* face; |
| 301 | stream->read(&face, sizeof(face)); |
| 302 | return new FontFaceRec_Typeface(*face); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 303 | } |
| 304 | |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 305 | SkScalerContext* SkFontHost::CreateFallbackScalerContext( |
| 306 | const SkScalerContext::Rec& rec) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 307 | { |
| 308 | const FontFaceRec* face = get_default_face(); |
| 309 | |
reed@android.com | b50a60c | 2009-01-14 17:51:08 +0000 | [diff] [blame] | 310 | SkAutoDescriptor ad(sizeof(rec) + sizeof(face) + |
| 311 | SkDescriptor::ComputeOverhead(2)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 312 | SkDescriptor* desc = ad.getDesc(); |
reed@android.com | 563771e | 2009-01-14 14:16:46 +0000 | [diff] [blame] | 313 | SkScalerContext::Rec* newRec; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 314 | |
| 315 | desc->init(); |
reed@android.com | 563771e | 2009-01-14 14:16:46 +0000 | [diff] [blame] | 316 | newRec = reinterpret_cast<SkScalerContext::Rec*>( |
| 317 | desc->addEntry(kRec_SkDescriptorTag, sizeof(rec), &rec)); |
| 318 | newRec->fFontID = get_id(*face); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 319 | desc->computeChecksum(); |
| 320 | |
| 321 | return SkFontHost::CreateScalerContext(desc); |
| 322 | } |