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| 1 /* libs/graphics/ports/SkFontHost_fontconfig_impl.h | |
| 2 ** | |
| 3 ** Copyright 2009, Google Inc. | |
| 4 ** | |
| 5 ** Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 ** you may not use this file except in compliance with the License. | |
| 7 ** You may obtain a copy of the License at | |
| 8 ** | |
| 9 ** http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 ** | |
| 11 ** Unless required by applicable law or agreed to in writing, software | |
| 12 ** distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 ** See the License for the specific language governing permissions and | |
| 15 ** limitations under the License. | |
| 16 */ | |
| 17 | |
| 18 /* The SkFontHost_fontconfig code requires an implementation of an abstact | |
| 19 * fontconfig interface. We do this because sometimes fontconfig is not | |
| 20 * directly availible and this provides an ability to change the fontconfig | |
| 21 * implementation at run-time. | |
| 22 */ | |
| 23 | |
| 24 #ifndef FontConfigInterface_DEFINED | |
| 25 #define FontConfigInterface_DEFINED | |
| 26 | |
| 27 #include <string> | |
| 28 | |
| 29 class FontConfigInterface { | |
| 30 public: | |
| 31 virtual ~FontConfigInterface() { } | |
| 32 | |
| 33 /** Performs config match | |
| 34 * | |
| 35 * @param result_family (optional, set to NULL to ignore, output) | |
| 36 * on success, set to the resulting family name. | |
| 37 * @param result_filefaceid (optional, set to NULL to ignore, output) | |
| 38 * on success, set to the resulting fileface id. | |
| 39 * @param filefaceid_valid if true, then |filefaceid| is valid | |
| 40 * @param filefaceid the filefaceid (as returned by this function) | |
| 41 * which we are trying to match. | |
| 42 * @param family (optional) the family of the font that we are trying to | |
| 43 * match. If the length of the |family| is greater then | |
| 44 * kMaxFontFamilyLength, this function should immediately return false. | |
| 45 * @param characters (optional) UTF-16 characters the font must cover. | |
| 46 * @param characters_bytes (optional) number of bytes in |characters| | |
| 47 * @param is_bold (optional, set to NULL to ignore, in/out) | |
| 48 * @param is_italic (optional, set to NULL to ignore, in/out) | |
| 49 * @return true iff successful. | |
| 50 * Note that |filefaceid| uniquely identifies <font file, face_index) : | |
| 51 * system font: filefaceid = | |
| 52 * (fileid(unique per font file) << 4 | face_index) | |
| 53 * remote font: filefaceid = fileid | |
| 54 */ | |
| 55 virtual bool Match( | |
| 56 std::string* result_family, | |
| 57 unsigned* result_filefaceid, | |
| 58 bool filefaceid_valid, | |
| 59 unsigned filefaceid, | |
| 60 const std::string& family, | |
| 61 const void* characters, | |
| 62 size_t characters_bytes, | |
| 63 bool* is_bold, | |
| 64 bool* is_italic) = 0; | |
| 65 | |
| 66 /** Open a font file given the filefaceid as returned by Match. | |
| 67 */ | |
| 68 virtual int Open(unsigned filefaceid) = 0; | |
| 69 | |
| 70 static const unsigned kMaxFontFamilyLength = 2048; | |
| 71 }; | |
| 72 | |
| 73 #endif // FontConfigInterface_DEFINED | |
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Chromium Code Reviews
Issue 12391070:
Call Skia's version of SkFontHost_fontconfig (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/