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sourcerer |
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/* |
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* Copyright 2005 James Bursa |
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* 2008 Vincent Sanders |
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* |
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* This file is part of NetSurf, http://www.netsurf-browser.org/ |
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* |
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* NetSurf is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; version 2 of the License. |
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* |
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* NetSurf is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see . |
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*/ |
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#include |
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#include |
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#include |
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#include FT_CACHE_H |
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#include "css/css.h" |
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#include "css/utils.h" |
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#include "render/font.h" |
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#include "utils/filepath.h" |
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#include "utils/utf8.h" |
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#include "utils/log.h" |
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#include "desktop/options.h" |
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#include "framebuffer/gui.h" |
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#include "framebuffer/font.h" |
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#include "framebuffer/findfile.h" |
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#include "font_freetype.h" |
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/* glyph cache minimum size */ |
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#define CACHE_MIN_SIZE (100 * 1024) |
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#define BOLD_WEIGHT 700 |
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ashmew2 |
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#ifdef DBG |
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#undef DBG |
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#endif |
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//#define DBG(s) __menuet__debug_out(s) /* For the debug messages in BOARD */ |
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#define DBG(s) LOG((s)) /* So that we see debug in Netsurf's LOG files */ |
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| 3584 |
sourcerer |
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static FT_Library library; |
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static FTC_Manager ft_cmanager; |
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static FTC_CMapCache ft_cmap_cache ; |
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static FTC_ImageCache ft_image_cache; |
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int ft_load_type; |
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/* cache manager faceID data to create freetype faceid on demand */ |
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typedef struct fb_faceid_s { |
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char *fontfile; /* path to font */ |
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int index; /* index of font */ |
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int cidx; /* character map index for unicode */ |
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} fb_faceid_t; |
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enum fb_face_e { |
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FB_FACE_SANS_SERIF = 0, |
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FB_FACE_SANS_SERIF_BOLD = 1, |
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FB_FACE_SANS_SERIF_ITALIC = 2, |
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FB_FACE_SANS_SERIF_ITALIC_BOLD = 3, |
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FB_FACE_SERIF = 4, |
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FB_FACE_SERIF_BOLD = 5, |
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FB_FACE_MONOSPACE = 6, |
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FB_FACE_MONOSPACE_BOLD = 7, |
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FB_FACE_CURSIVE = 8, |
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FB_FACE_FANTASY = 9, |
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}; |
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/* defines for accesing the faces */ |
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#define FB_FACE_DEFAULT 0 |
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#define FB_FACE_COUNT 10 |
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static fb_faceid_t *fb_faces[FB_FACE_COUNT]; |
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utf8_convert_ret utf8_to_local_encoding(const char *string, |
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size_t len, |
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char **result) |
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{ |
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return utf8_to_enc(string, "UTF-8", len, result); |
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} |
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utf8_convert_ret utf8_from_local_encoding(const char *string, |
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size_t len, |
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char **result) |
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{ |
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*result = malloc(len + 1); |
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if (*result == NULL) { |
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return UTF8_CONVERT_NOMEM; |
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} |
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memcpy(*result, string, len); |
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(*result)[len] = '\0'; |
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return UTF8_CONVERT_OK; |
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} |
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/* map cache manager handle to face id */ |
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static FT_Error ft_face_requester(FTC_FaceID face_id, FT_Library library, FT_Pointer request_data, FT_Face *face ) |
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{ |
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FT_Error error; |
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fb_faceid_t *fb_face = (fb_faceid_t *)face_id; |
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int cidx; |
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error = FT_New_Face(library, fb_face->fontfile, fb_face->index, face); |
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if (error) { |
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LOG(("Could not find font (code %d)\n", error)); |
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} else { |
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error = FT_Select_Charmap(*face, FT_ENCODING_UNICODE); |
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if (error) { |
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LOG(("Could not select charmap (code %d)\n", error)); |
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} else { |
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for (cidx = 0; cidx < (*face)->num_charmaps; cidx++) { |
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if ((*face)->charmap == (*face)->charmaps[cidx]) { |
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fb_face->cidx = cidx; |
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break; |
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} |
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} |
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} |
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} |
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LOG(("Loaded face from %s\n", fb_face->fontfile)); |
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return error; |
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} |
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/* create new framebuffer face and cause it to be loaded to check its ok */ |
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static fb_faceid_t * |
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fb_new_face(const char *option, const char *resname, const char *fontname) |
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{ |
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fb_faceid_t *newf; |
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FT_Error error; |
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FT_Face aface; |
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char buf[PATH_MAX]; |
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newf = calloc(1, sizeof(fb_faceid_t)); |
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if (option != NULL) { |
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newf->fontfile = strdup(option); |
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} else { |
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filepath_sfind(respaths, buf, fontname); |
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newf->fontfile = strdup(buf); |
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} |
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error = FTC_Manager_LookupFace(ft_cmanager, (FTC_FaceID)newf, &aface); |
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if (error) { |
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LOG(("Could not find font face %s (code %d)\n", fontname, error)); |
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free(newf); |
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newf = NULL; |
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} |
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return newf; |
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} |
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#include |
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/* initialise font handling */ |
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bool fb_font_init(void) |
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{ |
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FT_Error error; |
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FT_ULong max_cache_size; |
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FT_UInt max_faces = 6; |
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fb_faceid_t *fb_face; |
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LOG(("Freetype init...")); |
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nsoptions.fb_font_monochrome = false; |
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nsoptions.fb_font_cachesize = 2048; |
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nsoptions.fb_face_sans_serif = NULL; |
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nsoptions.fb_face_sans_serif_bold = NULL; |
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nsoptions.fb_face_sans_serif_italic = NULL; |
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nsoptions.fb_face_sans_serif_italic_bold = NULL; |
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nsoptions.fb_face_serif = NULL; |
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nsoptions.fb_face_serif_bold = NULL; |
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nsoptions.fb_face_monospace = NULL; |
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nsoptions.fb_face_monospace_bold = NULL; |
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nsoptions.fb_face_cursive = NULL; |
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nsoptions.fb_face_fantasy = NULL; |
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/* freetype library initialise */ |
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error = FT_Init_FreeType( &library ); |
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if (error) { |
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LOG(("Freetype could not initialised (code %d)\n", error)); |
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return false; |
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} |
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/* set the Glyph cache size up */ |
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max_cache_size = nsoption_int(fb_font_cachesize) * 1024; |
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if (max_cache_size < CACHE_MIN_SIZE) { |
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max_cache_size = CACHE_MIN_SIZE; |
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} |
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LOG(("Freetype cache...")); |
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ashmew2 |
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DBG("Ft cache\n"); |
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sourcerer |
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/* cache manager initialise */ |
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error = FTC_Manager_New(library, |
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max_faces, |
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0, |
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max_cache_size, |
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ft_face_requester, |
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NULL, |
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&ft_cmanager); |
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if (error) { |
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LOG(("Freetype could not initialise cache manager (code %d)\n", error)); |
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FT_Done_FreeType(library); |
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return false; |
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} |
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LOG(("Freetype map cache...")); |
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ashmew2 |
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DBG("Ft map cache\n"); |
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sourcerer |
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error = FTC_CMapCache_New(ft_cmanager, &ft_cmap_cache); |
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error = FTC_ImageCache_New(ft_cmanager, &ft_image_cache); |
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/* need to obtain the generic font faces */ |
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LOG(("Freetype load fonts...")); |
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ashmew2 |
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DBG("Ft load fonts\n"); |
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sourcerer |
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/* Start with the sans serif font */ |
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fb_face = fb_new_face(nsoption_charp(fb_face_sans_serif), |
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"sans_serif.ttf", |
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NETSURF_FB_FONT_SANS_SERIF); |
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if (fb_face == NULL) { |
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LOG(("Freetype load fonts failed due SANS unavailable :(...")); |
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ashmew2 |
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DBG("Ft Z:(((\n"); |
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sourcerer |
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/* The sans serif font is the default and must be found. */ |
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LOG(("Could not find the default font\n")); |
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FTC_Manager_Done(ft_cmanager); |
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FT_Done_FreeType(library); |
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return false; |
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} else { |
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fb_faces[FB_FACE_SANS_SERIF] = fb_face; |
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} |
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LOG(("Freetype loaded sans..")); |
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ashmew2 |
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DBG("Ft sans loaded:)\n"); |
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sourcerer |
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/* Bold sans serif face */ |
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fb_face = fb_new_face(nsoption_charp(fb_face_sans_serif_bold), |
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"sans_serif_bold.ttf", |
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NETSURF_FB_FONT_SANS_SERIF_BOLD); |
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if (fb_face == NULL) { |
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/* seperate bold face unavailabe use the normal weight version */ |
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fb_faces[FB_FACE_SANS_SERIF_BOLD] = fb_faces[FB_FACE_SANS_SERIF]; |
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} else { |
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fb_faces[FB_FACE_SANS_SERIF_BOLD] = fb_face; |
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} |
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/* Italic sans serif face */ |
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fb_face = fb_new_face(nsoption_charp(fb_face_sans_serif_italic), |
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"sans_serif_italic.ttf", |
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NETSURF_FB_FONT_SANS_SERIF_ITALIC); |
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if (fb_face == NULL) { |
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/* seperate italic face unavailabe use the normal weight version */ |
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fb_faces[FB_FACE_SANS_SERIF_ITALIC] = fb_faces[FB_FACE_SANS_SERIF]; |
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} else { |
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fb_faces[FB_FACE_SANS_SERIF_ITALIC] = fb_face; |
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} |
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/* Bold italic sans serif face */ |
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fb_face = fb_new_face(nsoption_charp(fb_face_sans_serif_italic_bold), |
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"sans_serif_italic_bold.ttf", |
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NETSURF_FB_FONT_SANS_SERIF_ITALIC_BOLD); |
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if (fb_face == NULL) { |
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/* seperate italic face unavailabe use the normal weight version */ |
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fb_faces[FB_FACE_SANS_SERIF_ITALIC_BOLD] = fb_faces[FB_FACE_SANS_SERIF]; |
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} else { |
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fb_faces[FB_FACE_SANS_SERIF_ITALIC_BOLD] = fb_face; |
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} |
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/* serif face */ |
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fb_face = fb_new_face(nsoption_charp(fb_face_serif), |
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"serif.ttf", |
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NETSURF_FB_FONT_SERIF); |
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if (fb_face == NULL) { |
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/* serif face unavailabe use the default */ |
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fb_faces[FB_FACE_SERIF] = fb_faces[FB_FACE_SANS_SERIF]; |
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} else { |
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fb_faces[FB_FACE_SERIF] = fb_face; |
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} |
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/* bold serif face*/ |
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fb_face = fb_new_face(nsoption_charp(fb_face_serif_bold), |
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"serif_bold.ttf", |
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NETSURF_FB_FONT_SERIF_BOLD); |
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if (fb_face == NULL) { |
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/* bold serif face unavailabe use the normal weight */ |
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fb_faces[FB_FACE_SERIF_BOLD] = fb_faces[FB_FACE_SERIF]; |
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} else { |
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fb_faces[FB_FACE_SERIF_BOLD] = fb_face; |
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} |
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/* monospace face */ |
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fb_face = fb_new_face(nsoption_charp(fb_face_monospace), |
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"monospace.ttf", |
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NETSURF_FB_FONT_MONOSPACE); |
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if (fb_face == NULL) { |
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/* serif face unavailabe use the default */ |
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fb_faces[FB_FACE_MONOSPACE] = fb_faces[FB_FACE_SANS_SERIF]; |
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} else { |
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fb_faces[FB_FACE_MONOSPACE] = fb_face; |
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} |
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320 |
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/* bold monospace face*/ |
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fb_face = fb_new_face(nsoption_charp(fb_face_monospace_bold), |
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"monospace_bold.ttf", |
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NETSURF_FB_FONT_MONOSPACE_BOLD); |
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if (fb_face == NULL) { |
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/* bold serif face unavailabe use the normal weight */ |
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fb_faces[FB_FACE_MONOSPACE_BOLD] = fb_faces[FB_FACE_MONOSPACE]; |
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} else { |
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fb_faces[FB_FACE_MONOSPACE_BOLD] = fb_face; |
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} |
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/* cursive face */ |
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fb_face = fb_new_face(nsoption_charp(fb_face_cursive), |
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"cursive.ttf", |
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NETSURF_FB_FONT_CURSIVE); |
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if (fb_face == NULL) { |
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/* cursive face unavailabe use the default */ |
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fb_faces[FB_FACE_CURSIVE] = fb_faces[FB_FACE_SANS_SERIF]; |
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} else { |
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fb_faces[FB_FACE_CURSIVE] = fb_face; |
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} |
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/* fantasy face */ |
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fb_face = fb_new_face(nsoption_charp(fb_face_fantasy), |
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"fantasy.ttf", |
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NETSURF_FB_FONT_FANTASY); |
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347 |
if (fb_face == NULL) { |
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/* fantasy face unavailabe use the default */ |
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fb_faces[FB_FACE_FANTASY] = fb_faces[FB_FACE_SANS_SERIF]; |
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} else { |
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fb_faces[FB_FACE_FANTASY] = fb_face; |
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352 |
} |
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353 |
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354 |
LOG(("Freetype fonts ready...")); |
| 5043 |
ashmew2 |
355 |
DBG("Ft ready :)\n"); |
| 3584 |
sourcerer |
356 |
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357 |
/* set the default render mode */ |
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358 |
if (nsoption_bool(fb_font_monochrome) == true) |
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359 |
ft_load_type = FT_LOAD_MONOCHROME; /* faster but less pretty */ |
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360 |
else |
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361 |
ft_load_type = 0; |
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362 |
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363 |
return true; |
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364 |
} |
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365 |
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366 |
bool fb_font_finalise(void) |
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367 |
{ |
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368 |
FTC_Manager_Done(ft_cmanager ); |
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369 |
FT_Done_FreeType(library); |
|
|
370 |
return true; |
|
|
371 |
} |
|
|
372 |
|
|
|
373 |
static void fb_fill_scalar(const plot_font_style_t *fstyle, FTC_Scaler srec) |
|
|
374 |
{ |
|
|
375 |
int selected_face = FB_FACE_DEFAULT; |
|
|
376 |
|
|
|
377 |
switch (fstyle->family) { |
|
|
378 |
|
|
|
379 |
case PLOT_FONT_FAMILY_SERIF: |
|
|
380 |
if (fstyle->weight >= BOLD_WEIGHT) { |
|
|
381 |
selected_face = FB_FACE_SERIF_BOLD; |
|
|
382 |
} else { |
|
|
383 |
selected_face = FB_FACE_SERIF; |
|
|
384 |
} |
|
|
385 |
break; |
|
|
386 |
|
|
|
387 |
case PLOT_FONT_FAMILY_MONOSPACE: |
|
|
388 |
if (fstyle->weight >= BOLD_WEIGHT) { |
|
|
389 |
selected_face = FB_FACE_MONOSPACE_BOLD; |
|
|
390 |
} else { |
|
|
391 |
selected_face = FB_FACE_MONOSPACE; |
|
|
392 |
} |
|
|
393 |
break; |
|
|
394 |
|
|
|
395 |
case PLOT_FONT_FAMILY_CURSIVE: |
|
|
396 |
selected_face = FB_FACE_CURSIVE; |
|
|
397 |
break; |
|
|
398 |
|
|
|
399 |
case PLOT_FONT_FAMILY_FANTASY: |
|
|
400 |
selected_face = FB_FACE_FANTASY; |
|
|
401 |
break; |
|
|
402 |
|
|
|
403 |
case PLOT_FONT_FAMILY_SANS_SERIF: |
|
|
404 |
default: |
|
|
405 |
if ((fstyle->flags & FONTF_ITALIC) || |
|
|
406 |
(fstyle->flags & FONTF_OBLIQUE)) { |
|
|
407 |
if (fstyle->weight >= BOLD_WEIGHT) { |
|
|
408 |
selected_face = FB_FACE_SANS_SERIF_ITALIC_BOLD; |
|
|
409 |
} else { |
|
|
410 |
selected_face = FB_FACE_SANS_SERIF_ITALIC; |
|
|
411 |
} |
|
|
412 |
} else { |
|
|
413 |
if (fstyle->weight >= BOLD_WEIGHT) { |
|
|
414 |
selected_face = FB_FACE_SANS_SERIF_BOLD; |
|
|
415 |
} else { |
|
|
416 |
selected_face = FB_FACE_SANS_SERIF; |
|
|
417 |
} |
|
|
418 |
} |
|
|
419 |
} |
|
|
420 |
|
|
|
421 |
srec->face_id = (FTC_FaceID)fb_faces[selected_face]; |
|
|
422 |
|
|
|
423 |
srec->width = srec->height = (fstyle->size * 64) / FONT_SIZE_SCALE; |
|
|
424 |
srec->pixel = 0; |
|
|
425 |
|
|
|
426 |
srec->x_res = srec->y_res = FIXTOINT(nscss_screen_dpi); |
|
|
427 |
} |
|
|
428 |
|
|
|
429 |
FT_Glyph fb_getglyph(const plot_font_style_t *fstyle, uint32_t ucs4) |
|
|
430 |
{ |
|
|
431 |
FT_UInt glyph_index; |
|
|
432 |
FTC_ScalerRec srec; |
|
|
433 |
FT_Glyph glyph; |
|
|
434 |
FT_Error error; |
|
|
435 |
fb_faceid_t *fb_face; |
|
|
436 |
|
|
|
437 |
fb_fill_scalar(fstyle, &srec); |
|
|
438 |
|
|
|
439 |
fb_face = (fb_faceid_t *)srec.face_id; |
|
|
440 |
|
|
|
441 |
glyph_index = FTC_CMapCache_Lookup(ft_cmap_cache, srec.face_id, |
|
|
442 |
fb_face->cidx, ucs4); |
|
|
443 |
|
|
|
444 |
error = FTC_ImageCache_LookupScaler(ft_image_cache, |
|
|
445 |
&srec, |
|
|
446 |
FT_LOAD_RENDER | |
|
|
447 |
FT_LOAD_FORCE_AUTOHINT | |
|
|
448 |
ft_load_type, |
|
|
449 |
glyph_index, |
|
|
450 |
&glyph, |
|
|
451 |
NULL); |
|
|
452 |
if (error != 0) |
|
|
453 |
return NULL; |
|
|
454 |
|
|
|
455 |
return glyph; |
|
|
456 |
} |
|
|
457 |
|
|
|
458 |
|
|
|
459 |
/** |
|
|
460 |
* Measure the width of a string. |
|
|
461 |
* |
|
|
462 |
* \param fstyle style for this text |
|
|
463 |
* \param string UTF-8 string to measure |
|
|
464 |
* \param length length of string |
|
|
465 |
* \param width updated to width of string[0..length) |
|
|
466 |
* \return true on success, false on error and error reported |
|
|
467 |
*/ |
|
|
468 |
static bool nsfont_width(const plot_font_style_t *fstyle, |
|
|
469 |
const char *string, size_t length, |
|
|
470 |
int *width) |
|
|
471 |
{ |
|
|
472 |
uint32_t ucs4; |
|
|
473 |
size_t nxtchr = 0; |
|
|
474 |
FT_Glyph glyph; |
|
|
475 |
|
|
|
476 |
*width = 0; |
|
|
477 |
while (nxtchr < length) { |
|
|
478 |
ucs4 = utf8_to_ucs4(string + nxtchr, length - nxtchr); |
|
|
479 |
nxtchr = utf8_next(string, length, nxtchr); |
|
|
480 |
|
|
|
481 |
glyph = fb_getglyph(fstyle, ucs4); |
|
|
482 |
if (glyph == NULL) |
|
|
483 |
continue; |
|
|
484 |
|
|
|
485 |
*width += glyph->advance.x >> 16; |
|
|
486 |
} |
|
|
487 |
|
|
|
488 |
return true; |
|
|
489 |
} |
|
|
490 |
|
|
|
491 |
/** |
|
|
492 |
* Find the position in a string where an x coordinate falls. |
|
|
493 |
* |
|
|
494 |
* \param fstyle style for this text |
|
|
495 |
* \param string UTF-8 string to measure |
|
|
496 |
* \param length length of string |
|
|
497 |
* \param x x coordinate to search for |
|
|
498 |
* \param char_offset updated to offset in string of actual_x, [0..length] |
|
|
499 |
* \param actual_x updated to x coordinate of character closest to x |
|
|
500 |
* \return true on success, false on error and error reported |
|
|
501 |
*/ |
|
|
502 |
|
|
|
503 |
static bool nsfont_position_in_string(const plot_font_style_t *fstyle, |
|
|
504 |
const char *string, size_t length, |
|
|
505 |
int x, size_t *char_offset, int *actual_x) |
|
|
506 |
{ |
|
|
507 |
uint32_t ucs4; |
|
|
508 |
size_t nxtchr = 0; |
|
|
509 |
FT_Glyph glyph; |
|
|
510 |
int prev_x = 0; |
|
|
511 |
|
|
|
512 |
*actual_x = 0; |
|
|
513 |
while (nxtchr < length) { |
|
|
514 |
ucs4 = utf8_to_ucs4(string + nxtchr, length - nxtchr); |
|
|
515 |
|
|
|
516 |
glyph = fb_getglyph(fstyle, ucs4); |
|
|
517 |
if (glyph == NULL) |
|
|
518 |
continue; |
|
|
519 |
|
|
|
520 |
*actual_x += glyph->advance.x >> 16; |
|
|
521 |
if (*actual_x > x) |
|
|
522 |
break; |
|
|
523 |
|
|
|
524 |
prev_x = *actual_x; |
|
|
525 |
nxtchr = utf8_next(string, length, nxtchr); |
|
|
526 |
} |
|
|
527 |
|
|
|
528 |
/* choose nearest of previous and last x */ |
|
|
529 |
if (abs(*actual_x - x) > abs(prev_x - x)) |
|
|
530 |
*actual_x = prev_x; |
|
|
531 |
|
|
|
532 |
*char_offset = nxtchr; |
|
|
533 |
return true; |
|
|
534 |
} |
|
|
535 |
|
|
|
536 |
|
|
|
537 |
/** |
|
|
538 |
* Find where to split a string to make it fit a width. |
|
|
539 |
* |
|
|
540 |
* \param fstyle style for this text |
|
|
541 |
* \param string UTF-8 string to measure |
|
|
542 |
* \param length length of string |
|
|
543 |
* \param x width available |
|
|
544 |
* \param char_offset updated to offset in string of actual_x, [0..length] |
|
|
545 |
* \param actual_x updated to x coordinate of character closest to x |
|
|
546 |
* \return true on success, false on error and error reported |
|
|
547 |
* |
|
|
548 |
* On exit, [char_offset == 0 || |
|
|
549 |
* string[char_offset] == ' ' || |
|
|
550 |
* char_offset == length] |
|
|
551 |
*/ |
|
|
552 |
|
|
|
553 |
static bool nsfont_split(const plot_font_style_t *fstyle, |
|
|
554 |
const char *string, size_t length, |
|
|
555 |
int x, size_t *char_offset, int *actual_x) |
|
|
556 |
{ |
|
|
557 |
uint32_t ucs4; |
|
|
558 |
size_t nxtchr = 0; |
|
|
559 |
int last_space_x = 0; |
|
|
560 |
int last_space_idx = 0; |
|
|
561 |
FT_Glyph glyph; |
|
|
562 |
|
|
|
563 |
*actual_x = 0; |
|
|
564 |
while (nxtchr < length) { |
|
|
565 |
ucs4 = utf8_to_ucs4(string + nxtchr, length - nxtchr); |
|
|
566 |
|
|
|
567 |
glyph = fb_getglyph(fstyle, ucs4); |
|
|
568 |
if (glyph == NULL) |
|
|
569 |
continue; |
|
|
570 |
|
|
|
571 |
if (ucs4 == 0x20) { |
|
|
572 |
last_space_x = *actual_x; |
|
|
573 |
last_space_idx = nxtchr; |
|
|
574 |
} |
|
|
575 |
|
|
|
576 |
*actual_x += glyph->advance.x >> 16; |
|
|
577 |
if (*actual_x > x) { |
|
|
578 |
/* string has exceeded available width return previous |
|
|
579 |
* space |
|
|
580 |
*/ |
|
|
581 |
*actual_x = last_space_x; |
|
|
582 |
*char_offset = last_space_idx; |
|
|
583 |
return true; |
|
|
584 |
} |
|
|
585 |
|
|
|
586 |
nxtchr = utf8_next(string, length, nxtchr); |
|
|
587 |
} |
|
|
588 |
|
|
|
589 |
*char_offset = nxtchr; |
|
|
590 |
|
|
|
591 |
return true; |
|
|
592 |
} |
|
|
593 |
|
|
|
594 |
const struct font_functions nsfont = { |
|
|
595 |
nsfont_width, |
|
|
596 |
nsfont_position_in_string, |
|
|
597 |
nsfont_split |
|
|
598 |
}; |
|
|
599 |
|
|
|
600 |
/* |
|
|
601 |
* Local Variables: |
|
|
602 |
* c-basic-offset:8 |
|
|
603 |
* End: |
|
|
604 |
*/ |