bigbiff bigbiff | ac6cc08 | 2019-11-01 19:00:27 -0400 | [diff] [blame] | 1 | /* |
| 2 | Copyright 2013 to 2020 TeamWin |
| 3 | TWRP is free software: you can redistribute it and/or modify |
| 4 | it under the terms of the GNU General Public License as published by |
| 5 | the Free Software Foundation, either version 3 of the License, or |
| 6 | (at your option) any later version. |
| 7 | |
| 8 | TWRP is distributed in the hope that it will be useful, |
| 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | GNU General Public License for more details. |
| 12 | |
| 13 | You should have received a copy of the GNU General Public License |
| 14 | along with TWRP. If not, see <http://www.gnu.org/licenses/>. |
| 15 | */ |
| 16 | |
| 17 | #ifndef _TWRP_TRUETYPE_HPP |
| 18 | #define _TWRP_TRUETYPE_HPP |
| 19 | |
| 20 | #include <map> |
| 21 | #include <string> |
| 22 | #include <ft2build.h> |
| 23 | #include <pthread.h> |
| 24 | #include FT_FREETYPE_H |
| 25 | #include FT_GLYPH_H |
| 26 | #include <pixelflinger/pixelflinger.h> |
| 27 | #include "minui.h" |
| 28 | |
| 29 | typedef struct TrueTypeFontKey { |
| 30 | int size; |
| 31 | int dpi; |
bigbiff | fdca6b8 | 2020-09-12 13:36:33 -0400 | [diff] [blame] | 32 | std::string path; |
bigbiff bigbiff | ac6cc08 | 2019-11-01 19:00:27 -0400 | [diff] [blame] | 33 | } TrueTypeFontKey; |
| 34 | |
| 35 | inline bool operator<(const TrueTypeFontKey &ttfkLeft, const TrueTypeFontKey &ttfkRight) { |
bigbiff | fdca6b8 | 2020-09-12 13:36:33 -0400 | [diff] [blame] | 36 | return std::tie(ttfkLeft.size, ttfkLeft.dpi, ttfkLeft.path) < std::tie(ttfkRight.size, ttfkRight.dpi, ttfkRight.path); |
bigbiff bigbiff | ac6cc08 | 2019-11-01 19:00:27 -0400 | [diff] [blame] | 37 | } |
| 38 | |
| 39 | typedef struct { |
| 40 | FT_BBox bbox; |
| 41 | FT_BitmapGlyph glyph; |
| 42 | } TrueTypeCacheEntry; |
| 43 | |
| 44 | typedef struct StringCacheKey { |
| 45 | int max_width; |
| 46 | std::string text; |
| 47 | } StringCacheKey; |
| 48 | |
| 49 | inline bool operator<(const StringCacheKey &sckLeft, const StringCacheKey &sckRight) { |
| 50 | return std::tie(sckLeft.text, sckLeft.max_width) < std::tie(sckRight.text, sckRight.max_width); |
| 51 | } |
| 52 | |
| 53 | typedef struct StringCacheEntry { |
| 54 | GGLSurface surface; |
| 55 | int rendered_bytes; // number of bytes from C string rendered, not number of UTF8 characters! |
| 56 | StringCacheKey *key; |
| 57 | } StringCacheEntry; |
| 58 | |
| 59 | typedef struct { |
| 60 | int type; |
| 61 | int refcount; |
| 62 | int size; |
| 63 | int dpi; |
| 64 | int max_height; |
| 65 | int base; |
| 66 | FT_Face face; |
| 67 | std::map<int, TrueTypeCacheEntry*> glyph_cache; |
| 68 | std::map<StringCacheKey, StringCacheEntry*> string_cache; |
| 69 | pthread_mutex_t mutex; |
| 70 | TrueTypeFontKey *key; |
| 71 | } TrueTypeFont; |
| 72 | |
| 73 | typedef struct { |
| 74 | FT_Library ft_library; |
| 75 | std::map<TrueTypeFontKey, TrueTypeFont*> fonts; |
| 76 | pthread_mutex_t mutex; |
| 77 | } FontData; |
| 78 | |
| 79 | typedef std::map<StringCacheKey, StringCacheEntry*> StringCacheMap; |
| 80 | typedef std::map<int, TrueTypeCacheEntry*> TrueTypeCacheEntryMap; |
| 81 | typedef std::map<TrueTypeFontKey, TrueTypeFont*> TrueTypeFontMap; |
| 82 | |
| 83 | #define MIN(X,Y) ((X) < (Y) ? (X) : (Y)) |
| 84 | #define MAX(X,Y) ((X) > (Y) ? (X) : (Y)) |
| 85 | |
| 86 | // 32bit FNV-1a hash algorithm |
| 87 | // http://isthe.com/chongo/tech/comp/fnv/#FNV-1a |
| 88 | static const uint32_t FNV_prime = 16777619U; |
| 89 | static const uint32_t offset_basis = 2166136261U; |
| 90 | |
| 91 | #define STRING_CACHE_MAX_ENTRIES 400 |
| 92 | #define STRING_CACHE_TRUNCATE_ENTRIES 150 |
| 93 | |
| 94 | class twrpTruetype { |
| 95 | public: |
| 96 | twrpTruetype(); |
| 97 | static int utf8_to_unicode(const char* pIn, unsigned int *pOut); |
| 98 | static void* gr_ttf_loadFont(const char *filename, int size, int dpi); |
| 99 | static void* gr_ttf_scaleFont(void *font, int max_width, int measured_width); |
| 100 | static void gr_ttf_freeStringCache(void *key, void *value, void *context __unused); |
| 101 | static void gr_ttf_freeFont(void *font); |
| 102 | static TrueTypeCacheEntry* gr_ttf_glyph_cache_peek(TrueTypeFont *font, int char_index); |
| 103 | static TrueTypeCacheEntry* gr_ttf_glyph_cache_get(TrueTypeFont *font, int char_index); |
| 104 | static int gr_ttf_copy_glyph_to_surface(GGLSurface *dest, FT_BitmapGlyph glyph, int offX, int offY, int base); |
| 105 | static void gr_ttf_calcMaxFontHeight(TrueTypeFont *f); |
| 106 | static int gr_ttf_render_text(TrueTypeFont *font, GGLSurface *surface, const std::string text, int max_width); |
| 107 | static StringCacheEntry* gr_ttf_string_cache_peek(TrueTypeFont *font, const std::string text, __attribute__((unused)) int max_width); |
| 108 | static StringCacheEntry* gr_ttf_string_cache_get(TrueTypeFont *font, const std::string text, int max_width); |
| 109 | static int gr_ttf_measureEx(const char *s, void *font); |
| 110 | static int gr_ttf_maxExW(const char *s, void *font, int max_width); |
| 111 | static int gr_ttf_textExWH(void *context, int x, int y, |
| 112 | const char *s, void *pFont, |
| 113 | int max_width, int max_height, |
| 114 | const gr_surface gr_draw_surface); |
| 115 | static int gr_ttf_getMaxFontHeight(void *font); |
| 116 | static void gr_ttf_string_cache_truncate(TrueTypeFont *font); |
| 117 | }; |
| 118 | #endif // _TWRP_TRUETYPE_HPP |