diff options
Diffstat (limited to 'source/fitz')
-rw-r--r-- | source/fitz/font.c | 125 |
1 files changed, 108 insertions, 17 deletions
diff --git a/source/fitz/font.c b/source/fitz/font.c index 792e8d95..a7db05d4 100644 --- a/source/fitz/font.c +++ b/source/fitz/font.c @@ -178,12 +178,18 @@ fz_set_font_bbox(fz_context *ctx, fz_font *font, float xmin, float ymin, float x * Freetype hooks */ -struct fz_font_context_s { +struct fz_font_context_s +{ int ctx_refs; FT_Library ftlib; int ftlib_refs; fz_load_system_font_func load_font; fz_load_system_cjk_font_func load_cjk_font; + + /* Cached fallback fonts */ + struct { fz_font *serif, *sans; } fallback[256]; + fz_font *symbol; + fz_font *emoji; }; #undef __FTERRORS_H__ @@ -216,8 +222,19 @@ fz_keep_font_context(fz_context *ctx) void fz_drop_font_context(fz_context *ctx) { + int i; + if (!ctx) return; + + for (i = 0; i < nelem(ctx->font->fallback); ++i) + { + fz_drop_font(ctx, ctx->font->fallback[i].serif); + fz_drop_font(ctx, ctx->font->fallback[i].sans); + } + fz_drop_font(ctx, ctx->font->symbol); + fz_drop_font(ctx, ctx->font->emoji); + if (fz_drop_imp(ctx, ctx->font, &ctx->font->ctx_refs)) fz_free(ctx, ctx->font); } @@ -266,6 +283,66 @@ fz_font *fz_load_system_cjk_font(fz_context *ctx, const char *name, int ros, int return font; } +fz_font *fz_load_fallback_font(fz_context *ctx, int script, int serif, int bold, int italic) +{ + unsigned char *data; + unsigned int size; + + if (script < 0 || script > nelem(ctx->font->fallback)) + return NULL; + + /* TODO: bold and italic */ + + if (serif) + { + if (ctx->font->fallback[script].serif) + return ctx->font->fallback[script].serif; + data = fz_lookup_noto_font(ctx, script, 1, &size); + if (data) + { + ctx->font->fallback[script].serif = fz_new_font_from_memory(ctx, NULL, data, size, 0, 0); + return ctx->font->fallback[script].serif; + } + } + + if (ctx->font->fallback[script].sans) + return ctx->font->fallback[script].sans; + data = fz_lookup_noto_font(ctx, script, 0, &size); + if (data) + { + ctx->font->fallback[script].sans = fz_new_font_from_memory(ctx, NULL, data, size, 0, 0); + return ctx->font->fallback[script].sans; + } + + return NULL; +} + +fz_font *fz_load_fallback_symbol_font(fz_context *ctx) +{ + unsigned char *data; + unsigned int size; + if (!ctx->font->symbol) + { + data = fz_lookup_noto_symbol_font(ctx, &size); + if (data) + ctx->font->symbol = fz_new_font_from_memory(ctx, NULL, data, size, 0, 0); + } + return ctx->font->symbol; +} + +fz_font *fz_load_fallback_emoji_font(fz_context *ctx) +{ + unsigned char *data; + unsigned int size; + if (!ctx->font->emoji) + { + data = fz_lookup_noto_emoji_font(ctx, &size); + if (data) + ctx->font->emoji = fz_new_font_from_memory(ctx, NULL, data, size, 0, 0); + } + return ctx->font->emoji; +} + static const struct ft_error ft_errors[] = { #include FT_ERRORS_H @@ -1366,31 +1443,45 @@ fz_encode_character(fz_context *ctx, fz_font *font, int ucs) } int -fz_encode_character_with_fallback(fz_context *ctx, fz_font *first_font, int ucs, fz_font **out_font) +fz_encode_character_with_fallback(fz_context *ctx, fz_font *user_font, int unicode, int script, fz_font **out_font) { fz_font *font; + int gid; + + gid = fz_encode_character(ctx, user_font, unicode); + if (gid > 0) + return *out_font = user_font, gid; - for (font = first_font; font; font = font->fallback) + if (script == 0) + script = ucdn_get_script(unicode); + + font = fz_load_fallback_font(ctx, script, 0, 0, 0); + if (font) { - int gid = fz_encode_character(ctx, font, ucs); + gid = fz_encode_character(ctx, font, unicode); if (gid > 0) - { - *out_font = font; - return gid; - } + return *out_font = font, gid; } - ucs = 0x25CF; /* bullet */ - for (font = first_font; font; font = font->fallback) + font = fz_load_fallback_symbol_font(ctx); + if (font) { - int gid = fz_encode_character(ctx, font, ucs); + gid = fz_encode_character(ctx, font, unicode); if (gid > 0) - { - *out_font = font; - return gid; - } + return *out_font = font, gid; } - *out_font = first_font; - return 0; + font = fz_load_fallback_emoji_font(ctx); + if (font) + { + gid = fz_encode_character(ctx, font, unicode); + if (gid > 0) + return *out_font = font, gid; + } + + /* bullet */ + if (unicode != 0x25CF) + return fz_encode_character_with_fallback(ctx, user_font, 0x25CF, UCDN_SCRIPT_LATIN, out_font); + + return *out_font = user_font, 0; } |