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Quelle cairo-ft-font.cSprache: C |
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/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */ /* cairo - a vector graphics library with display and print output * * Copyright © 2000 Keith Packard * Copyright © 2005 Red Hat, Inc * * This library is free software; you can redistribute it and/or * modify it either under the terms of the GNU Lesser General Public * License version 2.1 as published by the Free Software Foundation * (the "LGPL") or, at your option, under the terms of the Mozilla * Public License Version 1.1 (the "MPL"). If you do not alter this * notice, a recipient may use your version of this file under either * the MPL or the LGPL. * * You should have received a copy of the LGPL along with this library * in the file COPYING-LGPL-2.1; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA * You should have received a copy of the MPL along with this library * in the file COPYING-MPL-1.1 * * The contents of this file are subject to the Mozilla Public License * Version 1.1 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY * OF ANY KIND, either express or implied. See the LGPL or the MPL for * the specific language governing rights and limitations. * * The Original Code is the cairo graphics library. * * The Initial Developer of the Original Code is Red Hat, Inc. * * Contributor(s): * Graydon Hoare <graydon@redhat.com> * Owen Taylor <otaylor@redhat.com> * Keith Packard <keithp@keithp.com> * Carl Worth <cworth@cworth.org> */ #define _DEFAULT_SOURCE /* for strdup() */ #include "cairoint.h" #include "cairo-error-private.h" #include "cairo-image-surface-private.h" #include "cairo-ft-private.h" #include "cairo-list-inline.h" #include "cairo-path-private.h" #include "cairo-pattern-private.h" #include "cairo-pixman-private.h" #include "cairo-recording-surface-private.h" #include <float.h> #include "cairo-fontconfig-private.h" #include <ft2build.h> #include FT_FREETYPE_H #include FT_OUTLINE_H #include FT_IMAGE_H #include FT_BITMAP_H #include FT_TRUETYPE_TABLES_H #include FT_XFREE86_H #include FT_MULTIPLE_MASTERS_H #if HAVE_FT_GLYPHSLOT_EMBOLDEN #include FT_SYNTHESIS_H #endif #ifdef FT_COLOR_H #include FT_COLOR_H #endif #if HAVE_FT_LIBRARY_SETLCDFILTER #include FT_LCD_FILTER_H #endif #if HAVE_FT_SVG_DOCUMENT #include FT_OTSVG_H #endif #if HAVE_UNISTD_H #include <unistd.h> #elif !defined(access) #define access(p, m) 0 #endif #include <dlfcn.h> /* Fontconfig version older than 2.6 didn't have these options */ #ifndef FC_LCD_FILTER #define FC_LCD_FILTER "lcdfilter" #endif /* Some Ubuntu versions defined FC_LCD_FILTER without defining the following */ #ifndef FC_LCD_NONE #define FC_LCD_NONE 0 #define FC_LCD_DEFAULT 1 #define FC_LCD_LIGHT 2 #define FC_LCD_LEGACY 3 #endif /* FreeType version older than 2.3.5(?) didn't have these options */ #ifndef FT_LCD_FILTER_NONE #define FT_LCD_FILTER_NONE 0 #define FT_LCD_FILTER_DEFAULT 1 #define FT_LCD_FILTER_LIGHT 2 #define FT_LCD_FILTER_LEGACY 16 #endif /* FreeType version older than 2.11 does not have the FT_RENDER_MODE_SDF enum value in FT_Rend #if FREETYPE_MAJOR > 2 || (FREETYPE_MAJOR == 2 && FREETYPE_MINOR >= 11) #define HAVE_FT_RENDER_MODE_SDF 1 #endif #define DOUBLE_FROM_26_6(t) ((double)(t) / 64.0) #define DOUBLE_TO_16_16(d) ((FT_Fixed)((d) * 65536.0)) #define DOUBLE_FROM_16_16(t) ((double)(t) / 65536.0) /* This is the max number of FT_face objects we keep open at once */ #define MAX_OPEN_FACES 10 extern void mozilla_AddRefSharedFTFace(void* aContext); extern void mozilla_ReleaseSharedFTFace(void* aContext, void* aOwner); /* Returns true if the face's state has been modified by another owner. */ extern int mozilla_LockSharedFTFace(void* aContext, void* aOwner); extern void mozilla_UnlockSharedFTFace(void* aContext); extern FT_Error mozilla_LoadFTGlyph(FT_Face aFace, uint32_t aGlyphIndex, int32_t aFlags extern void mozilla_LockFTLibrary(FT_Library aLibrary); extern void mozilla_UnlockFTLibrary(FT_Library aLibrary); #define CAIRO_FT_LOCK(unscaled) \ ((unscaled)->face_context \ ? (void)mozilla_LockSharedFTFace((unscaled)->face_context, NULL) \ : (void)CAIRO_MUTEX_LOCK((unscaled)->mutex)) #define CAIRO_FT_UNLOCK(unscaled) \ ((unscaled)->face_context \ ? mozilla_UnlockSharedFTFace((unscaled)->face_context) \ : (void)CAIRO_MUTEX_UNLOCK((unscaled)->mutex)) /** * Function types for FreeType symbols we'll look up at runtime, rather than * relying on build-time checks for availability. */ typedef FT_Error (*GetVarFunc) (FT_Face, FT_MM_Var**); typedef FT_Error (*DoneVarFunc) (FT_Library, FT_MM_Var*); typedef FT_Error (*GetVarDesignCoordsFunc) (FT_Face, FT_UInt, FT_Fixed*); typedef FT_Error (*SetVarDesignCoordsFunc) (FT_Face, FT_UInt, FT_Fixed*); typedef FT_Error (*GetVarBlendCoordsFunc) (FT_Face, FT_UInt, FT_Fixed*); /** * SECTION:cairo-ft * @Title: FreeType Fonts * @Short_Description: Font support for FreeType * @See_Also: #cairo_font_face_t * * The FreeType font backend is primarily used to render text on GNU/Linux * systems, but can be used on other platforms too. **/ /** * CAIRO_HAS_FT_FONT: * * Defined if the FreeType font backend is available. * This macro can be used to conditionally compile backend-specific code. * * Since: 1.0 **/ /** * CAIRO_HAS_FC_FONT: * * Defined if the Fontconfig-specific functions of the FreeType font backend * are available. * This macro can be used to conditionally compile backend-specific code. * * Since: 1.10 **/ /* * The simple 2x2 matrix is converted into separate scale and shape * factors so that hinting works right */ typedef struct _cairo_ft_font_transform { double x_scale, y_scale; double shape[2][2]; } cairo_ft_font_transform_t; /* * We create an object that corresponds to a single font on the disk; * (identified by a filename/id pair) these are shared between all * fonts using that file. For cairo_ft_font_face_create_for_ft_face(), we * just create a one-off version with a permanent face value. */ typedef struct _cairo_ft_font_face cairo_ft_font_face_t; struct _cairo_ft_unscaled_font { cairo_unscaled_font_t base; cairo_bool_t from_face; /* was the FT_Face provided by user? */ FT_Face face; /* provided or cached face */ void *face_context; /* only set if from_face is false */ char *filename; int id; /* We temporarily scale the unscaled font as needed */ cairo_bool_t have_scale; cairo_matrix_t current_scale; double x_scale; /* Extracted X scale factor */ double y_scale; /* Extracted Y scale factor */ cairo_bool_t have_shape; /* true if the current scale has a non-scale component*/ cairo_matrix_t current_shape; FT_Matrix Current_Shape; unsigned int have_color_set : 1; unsigned int have_color : 1; /* true if the font contains color glyphs */ FT_Fixed *variations; /* variation settings that FT_Face came */ unsigned int num_palettes; cairo_mutex_t mutex; int lock_count; cairo_ft_font_face_t *faces; /* Linked list of faces for this font */ }; static int _cairo_ft_unscaled_font_keys_equal (const void *key_a, const void *key_b); static void _cairo_ft_unscaled_font_fini (cairo_ft_unscaled_font_t *unscaled); typedef struct _cairo_ft_options { cairo_font_options_t base; unsigned int load_flags; /* flags for FT_Load_Glyph */ unsigned int synth_flags; } cairo_ft_options_t; static void _cairo_ft_options_init_copy (cairo_ft_options_t *options, const cairo_ft_options_t *other) { _cairo_font_options_init_copy (&options->base, &other->base); options->load_flags = other->load_flags; options->synth_flags = other->synth_flags; } static void _cairo_ft_options_fini (cairo_ft_options_t *options) { _cairo_font_options_fini (&options->base); } struct _cairo_ft_font_face { cairo_font_face_t base; cairo_ft_unscaled_font_t *unscaled; cairo_ft_options_t ft_options; cairo_ft_font_face_t *next; #if CAIRO_HAS_FC_FONT FcPattern *pattern; /* if pattern is set, the above fields will be NULL */ cairo_font_face_t *resolved_font_face; FcConfig *resolved_config; #endif }; static const cairo_unscaled_font_backend_t cairo_ft_unscaled_font_backend; #if CAIRO_HAS_FC_FONT static cairo_status_t _cairo_ft_font_options_substitute (const cairo_font_options_t *options, FcPattern *pattern); static cairo_font_face_t * _cairo_ft_resolve_pattern (FcPattern *pattern, const cairo_matrix_t *font_matrix, const cairo_matrix_t *ctm, const cairo_font_options_t *options); #endif cairo_status_t _cairo_ft_to_cairo_error (FT_Error error) { /* Currently we don't get many (any?) useful statuses here. * Populate as needed. */ switch (error) { case FT_Err_Ok: return CAIRO_STATUS_SUCCESS; case FT_Err_Out_Of_Memory: return CAIRO_STATUS_NO_MEMORY; default: return CAIRO_STATUS_FREETYPE_ERROR; } } /* * We maintain a hash table to map file/id => #cairo_ft_unscaled_font_t. * The hash table itself isn't limited in size. However, we limit the * number of FT_Face objects we keep around; when we've exceeded that * limit and need to create a new FT_Face, we dump the FT_Face from a * random #cairo_ft_unscaled_font_t which has an unlocked FT_Face, (if * there are any). */ typedef struct _cairo_ft_unscaled_font_map { cairo_hash_table_t *hash_table; FT_Library ft_library; int num_open_faces; } cairo_ft_unscaled_font_map_t; static cairo_ft_unscaled_font_map_t *cairo_ft_unscaled_font_map = NULL; static FT_Face _cairo_ft_unscaled_font_lock_face (cairo_ft_unscaled_font_t *unscaled); static void _cairo_ft_unscaled_font_unlock_face (cairo_ft_unscaled_font_t *unscaled); static cairo_bool_t _cairo_ft_scaled_font_is_vertical (cairo_scaled_font_t *scaled_font); static void _font_map_release_face_lock_held (cairo_ft_unscaled_font_map_t *font_map, cairo_ft_unscaled_font_t *unscaled) { if (unscaled->face) { FT_Done_Face (unscaled->face); unscaled->face = NULL; unscaled->have_scale = FALSE; font_map->num_open_faces--; } } static cairo_status_t _cairo_ft_unscaled_font_map_create (void) { cairo_ft_unscaled_font_map_t *font_map; /* This function is only intended to be called from * _cairo_ft_unscaled_font_map_lock. So we'll crash if we can * detect some other call path. */ assert (cairo_ft_unscaled_font_map == NULL); font_map = _cairo_malloc (sizeof (cairo_ft_unscaled_font_map_t)); if (unlikely (font_map == NULL)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); font_map->hash_table = _cairo_hash_table_create (_cairo_ft_unscaled_font_keys_equal); if (unlikely (font_map->hash_table == NULL)) goto FAIL; if (unlikely (FT_Init_FreeType (&font_map->ft_library))) goto FAIL; font_map->num_open_faces = 0; cairo_ft_unscaled_font_map = font_map; return CAIRO_STATUS_SUCCESS; FAIL: if (font_map->hash_table) _cairo_hash_table_destroy (font_map->hash_table); free (font_map); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } static void _cairo_ft_unscaled_font_map_pluck_entry (void *entry, void *closure) { cairo_ft_unscaled_font_t *unscaled = entry; cairo_ft_unscaled_font_map_t *font_map = closure; _cairo_hash_table_remove (font_map->hash_table, &unscaled->base.hash_entry); if (unscaled->from_face) mozilla_ReleaseSharedFTFace (unscaled->face_context, unscaled); else _font_map_release_face_lock_held (font_map, unscaled); _cairo_ft_unscaled_font_fini (unscaled); free (unscaled); } static void _cairo_ft_unscaled_font_map_destroy (void) { cairo_ft_unscaled_font_map_t *font_map; CAIRO_MUTEX_LOCK (_cairo_ft_unscaled_font_map_mutex); font_map = cairo_ft_unscaled_font_map; cairo_ft_unscaled_font_map = NULL; CAIRO_MUTEX_UNLOCK (_cairo_ft_unscaled_font_map_mutex); if (font_map != NULL) { _cairo_hash_table_foreach (font_map->hash_table, _cairo_ft_unscaled_font_map_pluck_entry, font_map); assert (font_map->num_open_faces == 0); FT_Done_FreeType (font_map->ft_library); _cairo_hash_table_destroy (font_map->hash_table); free (font_map); } } static cairo_ft_unscaled_font_map_t * _cairo_ft_unscaled_font_map_lock (void) { CAIRO_MUTEX_INITIALIZE (); CAIRO_MUTEX_LOCK (_cairo_ft_unscaled_font_map_mutex); if (unlikely (cairo_ft_unscaled_font_map == NULL)) { if (unlikely (_cairo_ft_unscaled_font_map_create ())) { CAIRO_MUTEX_UNLOCK (_cairo_ft_unscaled_font_map_mutex); return NULL; } } return cairo_ft_unscaled_font_map; } static void _cairo_ft_unscaled_font_map_unlock (void) { CAIRO_MUTEX_UNLOCK (_cairo_ft_unscaled_font_map_mutex); } static void _cairo_ft_unscaled_font_init_key (cairo_ft_unscaled_font_t *key, cairo_bool_t from_face, char *filename, int id, FT_Face face, void *face_context) { uintptr_t hash; key->from_face = from_face; key->filename = filename; key->id = id; key->face = face; key->face_context = face_context; hash = _cairo_hash_string (filename); /* the constants are just arbitrary primes */ hash += ((uintptr_t) id) * 1607; hash += ((uintptr_t) face) * 2137; key->base.hash_entry.hash = hash; } /** * _cairo_ft_unscaled_font_init: * * Initialize a #cairo_ft_unscaled_font_t. * * There are two basic flavors of #cairo_ft_unscaled_font_t, one * created from an FT_Face and the other created from a filename/id * pair. These two flavors are identified as from_face and !from_face. * * To initialize a from_face font, pass filename==%NULL, id=0 and the * desired face. * * To initialize a !from_face font, pass the filename/id as desired * and face==%NULL. * * Note that the code handles these two flavors in very distinct * ways. For example there is a hash_table mapping * filename/id->#cairo_unscaled_font_t in the !from_face case, but no * parallel in the from_face case, (where the calling code would have * to do its own mapping to ensure similar sharing). **/ static cairo_status_t _cairo_ft_unscaled_font_init (cairo_ft_unscaled_font_t *unscaled, cairo_bool_t from_face, const char *filename, int id, FT_Face face, void *face_context) { _cairo_unscaled_font_init (&unscaled->base, &cairo_ft_unscaled_font_backend); unscaled->variations = NULL; if (from_face) { unscaled->from_face = TRUE; _cairo_ft_unscaled_font_init_key (unscaled, TRUE, NULL, id, face, face_context); unscaled->have_color = FT_HAS_COLOR (face) != 0; unscaled->have_color_set = TRUE; static GetVarFunc getVar; static DoneVarFunc doneVar; static GetVarDesignCoordsFunc getVarDesignCoords; static int firstTime = 1; if (firstTime) { getVar = (GetVarFunc) dlsym (RTLD_DEFAULT, "FT_Get_MM_Var"); doneVar = (DoneVarFunc) dlsym (RTLD_DEFAULT, "FT_Done_MM_Var"); getVarDesignCoords = (GetVarDesignCoordsFunc) dlsym (RTLD_DEFAULT, "FT_Get_Var_Design firstTime = 0; } if (getVar && getVarDesignCoords) { FT_MM_Var *ft_mm_var; if (0 == (*getVar) (face, &ft_mm_var)) { unscaled->variations = calloc (ft_mm_var->num_axis, sizeof (FT_Fixed)); if (unscaled->variations) (*getVarDesignCoords) (face, ft_mm_var->num_axis, unscaled->variations); if (doneVar) (*doneVar) (face->glyph->library, ft_mm_var); else free (ft_mm_var); } } } else { char *filename_copy; unscaled->from_face = FALSE; unscaled->face = NULL; unscaled->face_context = NULL; filename_copy = strdup (filename); if (unlikely (filename_copy == NULL)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_ft_unscaled_font_init_key (unscaled, FALSE, filename_copy, id, NULL, NULL); unscaled->have_color_set = FALSE; } unscaled->have_scale = FALSE; CAIRO_MUTEX_INIT (unscaled->mutex); unscaled->lock_count = 0; unscaled->faces = NULL; return CAIRO_STATUS_SUCCESS; } /** * _cairo_ft_unscaled_font_fini: * * Free all data associated with a #cairo_ft_unscaled_font_t. * * CAUTION: The unscaled->face field must be %NULL before calling this * function. This is because the #cairo_ft_unscaled_font_t_map keeps a * count of these faces (font_map->num_open_faces) so it maintains the * unscaled->face field while it has its lock held. See * _font_map_release_face_lock_held(). **/ static void _cairo_ft_unscaled_font_fini (cairo_ft_unscaled_font_t *unscaled) { assert (unscaled->face == NULL); free (unscaled->filename); unscaled->filename = NULL; free (unscaled->variations); CAIRO_MUTEX_FINI (unscaled->mutex); } static int _cairo_ft_unscaled_font_keys_equal (const void *key_a, const void *key_b) { const cairo_ft_unscaled_font_t *unscaled_a = key_a; const cairo_ft_unscaled_font_t *unscaled_b = key_b; if (unscaled_a->id == unscaled_b->id && unscaled_a->from_face == unscaled_b->from_face) { if (unscaled_a->from_face) return unscaled_a->face == unscaled_b->face && unscaled_a->face_context == unscaled_b->face_context; if (unscaled_a->filename == NULL && unscaled_b->filename == NULL) return TRUE; else if (unscaled_a->filename == NULL || unscaled_b->filename == NULL) return FALSE; else return (strcmp (unscaled_a->filename, unscaled_b->filename) == 0); } return FALSE; } /* Finds or creates a #cairo_ft_unscaled_font_t for the filename/id from * pattern. Returns a new reference to the unscaled font. */ static cairo_status_t _cairo_ft_unscaled_font_create_internal (cairo_bool_t from_face, char *filename, int id, FT_Face font_face, void *face_context, cairo_ft_unscaled_font_t **out) { cairo_ft_unscaled_font_t key, *unscaled; cairo_ft_unscaled_font_map_t *font_map; cairo_status_t status; font_map = _cairo_ft_unscaled_font_map_lock (); if (unlikely (font_map == NULL)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_ft_unscaled_font_init_key (&key, from_face, filename, id, font_face, face_conte /* Return existing unscaled font if it exists in the hash table. */ unscaled = _cairo_hash_table_lookup (font_map->hash_table, &key.base.hash_entry); if (unscaled != NULL) { _cairo_unscaled_font_reference (&unscaled->base); goto DONE; } /* Otherwise create it and insert into hash table. */ unscaled = _cairo_malloc (sizeof (cairo_ft_unscaled_font_t)); if (unlikely (unscaled == NULL)) { status = _cairo_error (CAIRO_STATUS_NO_MEMORY); goto UNWIND_FONT_MAP_LOCK; } status = _cairo_ft_unscaled_font_init (unscaled, from_face, filename, id, font_face, fac if (unlikely (status)) goto UNWIND_UNSCALED_MALLOC; assert (unscaled->base.hash_entry.hash == key.base.hash_entry.hash); status = _cairo_hash_table_insert (font_map->hash_table, &unscaled->base.hash_entry); if (unlikely (status)) goto UNWIND_UNSCALED_FONT_INIT; mozilla_AddRefSharedFTFace (face_context); DONE: _cairo_ft_unscaled_font_map_unlock (); *out = unscaled; return CAIRO_STATUS_SUCCESS; UNWIND_UNSCALED_FONT_INIT: _cairo_ft_unscaled_font_fini (unscaled); UNWIND_UNSCALED_MALLOC: free (unscaled); UNWIND_FONT_MAP_LOCK: _cairo_ft_unscaled_font_map_unlock (); return status; } #if CAIRO_HAS_FC_FONT static cairo_status_t _cairo_ft_unscaled_font_create_for_pattern (FcPattern *pattern, cairo_ft_unscaled_font_t **out) { FT_Face font_face = NULL; char *filename = NULL; int id = 0; FcResult ret; ret = FcPatternGetFTFace (pattern, FC_FT_FACE, 0, &font_face); if (ret == FcResultMatch) goto DONE; if (ret == FcResultOutOfMemory) return _cairo_error (CAIRO_STATUS_NO_MEMORY); ret = FcPatternGetString (pattern, FC_FILE, 0, (FcChar8 **) &filename); if (ret == FcResultOutOfMemory) return _cairo_error (CAIRO_STATUS_NO_MEMORY); if (ret == FcResultMatch) { if (access (filename, R_OK) == 0) { /* If FC_INDEX is not set, we just use 0 */ ret = FcPatternGetInteger (pattern, FC_INDEX, 0, &id); if (ret == FcResultOutOfMemory) return _cairo_error (CAIRO_STATUS_NO_MEMORY); goto DONE; } else return _cairo_error (CAIRO_STATUS_FILE_NOT_FOUND); } /* The pattern contains neither a face nor a filename, resolve it later. */ *out = NULL; return CAIRO_STATUS_SUCCESS; DONE: return _cairo_ft_unscaled_font_create_internal (font_face != NULL, filename, id, font_face, NULL, out); } #endif static cairo_status_t _cairo_ft_unscaled_font_create_from_face (FT_Face face, void *face_context, cairo_ft_unscaled_font_t **out) { return _cairo_ft_unscaled_font_create_internal (TRUE, NULL, face->face_index, face, fac } static cairo_bool_t _cairo_ft_unscaled_font_destroy (void *abstract_font) { cairo_ft_unscaled_font_t *unscaled = abstract_font; cairo_ft_unscaled_font_map_t *font_map; font_map = _cairo_ft_unscaled_font_map_lock (); /* All created objects must have been mapped in the font map. */ assert (font_map != NULL); if (! _cairo_reference_count_dec_and_test (&unscaled->base.ref_count)) { /* somebody recreated the font whilst we waited for the lock */ _cairo_ft_unscaled_font_map_unlock (); return FALSE; } _cairo_hash_table_remove (font_map->hash_table, &unscaled->base.hash_entry); if (unscaled->from_face) { /* See comments in _ft_font_face_destroy about the "zombie" state * for a _ft_font_face. */ if (unscaled->faces && unscaled->faces->unscaled == NULL) { assert (unscaled->faces->next == NULL); CAIRO_FT_LOCK (unscaled); cairo_font_face_destroy (&unscaled->faces->base); CAIRO_FT_UNLOCK (unscaled); } mozilla_ReleaseSharedFTFace (unscaled->face_context, unscaled); } else { _font_map_release_face_lock_held (font_map, unscaled); } unscaled->face = NULL; unscaled->face_context = NULL; _cairo_ft_unscaled_font_map_unlock (); _cairo_ft_unscaled_font_fini (unscaled); return TRUE; } static cairo_bool_t _has_unlocked_face (const void *entry) { const cairo_ft_unscaled_font_t *unscaled = entry; return (!unscaled->from_face && unscaled->lock_count == 0 && unscaled->face); } /* Ensures that an unscaled font has a face object. If we exceed * MAX_OPEN_FACES, try to close some. * * This differs from _cairo_ft_scaled_font_lock_face in that it doesn't * set the scale on the face, but just returns it at the last scale. */ static cairo_warn FT_Face _cairo_ft_unscaled_font_lock_face (cairo_ft_unscaled_font_t *unscaled) { cairo_ft_unscaled_font_map_t *font_map; FT_Face face = NULL; FT_Error error; if (unscaled->face_context) { if (!mozilla_LockSharedFTFace (unscaled->face_context, unscaled)) { unscaled->have_scale = FALSE; } } else { CAIRO_FT_LOCK (unscaled); } unscaled->lock_count++; if (unscaled->face) return unscaled->face; /* If this unscaled font was created from an FT_Face then we just * returned it above. */ assert (!unscaled->from_face); font_map = _cairo_ft_unscaled_font_map_lock (); { assert (font_map != NULL); while (font_map->num_open_faces >= MAX_OPEN_FACES) { cairo_ft_unscaled_font_t *entry; entry = _cairo_hash_table_random_entry (font_map->hash_table, _has_unlocked_face); if (entry == NULL) break; _font_map_release_face_lock_held (font_map, entry); } } _cairo_ft_unscaled_font_map_unlock (); error = FT_New_Face (font_map->ft_library, unscaled->filename, unscaled->id, &face); if (error) { unscaled->lock_count--; CAIRO_FT_UNLOCK (unscaled); _cairo_error_throw (_cairo_ft_to_cairo_error (error)); return NULL; } unscaled->face = face; unscaled->have_color = FT_HAS_COLOR (face) != 0; unscaled->have_color_set = TRUE; font_map->num_open_faces++; return face; } /* Unlock unscaled font locked with _cairo_ft_unscaled_font_lock_face */ static void _cairo_ft_unscaled_font_unlock_face (cairo_ft_unscaled_font_t *unscaled) { assert (unscaled->lock_count > 0); unscaled->lock_count--; CAIRO_FT_UNLOCK (unscaled); } static cairo_status_t _compute_transform (cairo_ft_font_transform_t *sf, cairo_matrix_t *scale, cairo_ft_unscaled_font_t *unscaled) { cairo_status_t status; double x_scale, y_scale; cairo_matrix_t normalized = *scale; /* The font matrix has x and y "scale" components which we extract and * use as character scale values. These influence the way freetype * chooses hints, as well as selecting different bitmaps in * hand-rendered fonts. We also copy the normalized matrix to * freetype's transformation. */ status = _cairo_matrix_compute_basis_scale_factors (scale, &x_scale, &y_scale, 1); if (unlikely (status)) return status; /* FreeType docs say this about x_scale and y_scale: * "A character width or height smaller than 1pt is set to 1pt;" * So, we cap them from below at 1.0 and let the FT transform * take care of sub-1.0 scaling. */ if (x_scale < 1.0) x_scale = 1.0; if (y_scale < 1.0) y_scale = 1.0; if (unscaled && (unscaled->face->face_flags & FT_FACE_FLAG_SCALABLE) == 0) { double min_distance = DBL_MAX; cairo_bool_t magnify = TRUE; int i; double best_x_size = 0; double best_y_size = 0; for (i = 0; i < unscaled->face->num_fixed_sizes; i++) { double x_size = unscaled->face->available_sizes[i].x_ppem / 64.; double y_size = unscaled->face->available_sizes[i].y_ppem / 64.; double distance = y_size - y_scale; /* * distance is positive if current strike is larger than desired * size, and negative if smaller. * * We like to prefer down-scaling to upscaling. */ if ((magnify && distance >= 0) || fabs (distance) <= min_distance) { magnify = distance < 0; min_distance = fabs (distance); best_x_size = x_size; best_y_size = y_size; } } x_scale = best_x_size; y_scale = best_y_size; } sf->x_scale = x_scale; sf->y_scale = y_scale; cairo_matrix_scale (&normalized, 1.0 / x_scale, 1.0 / y_scale); _cairo_matrix_get_affine (&normalized, &sf->shape[0][0], &sf->shape[0][1], &sf->shape[1][0], &sf->shape[1][1], NULL, NULL); return CAIRO_STATUS_SUCCESS; } /* Temporarily scales an unscaled font to the give scale. We catch * scaling to the same size, since changing a FT_Face is expensive. */ static cairo_status_t _cairo_ft_unscaled_font_set_scale (cairo_ft_unscaled_font_t *unscaled, cairo_matrix_t *scale) { cairo_status_t status; cairo_ft_font_transform_t sf; FT_Matrix mat; FT_Error error; assert (unscaled->face != NULL); if (unscaled->have_scale && scale->xx == unscaled->current_scale.xx && scale->yx == unscaled->current_scale.yx && scale->xy == unscaled->current_scale.xy && scale->yy == unscaled->current_scale.yy) return CAIRO_STATUS_SUCCESS; unscaled->have_scale = TRUE; unscaled->current_scale = *scale; status = _compute_transform (&sf, scale, unscaled); if (unlikely (status)) return status; unscaled->x_scale = sf.x_scale; unscaled->y_scale = sf.y_scale; mat.xx = DOUBLE_TO_16_16(sf.shape[0][0]); mat.yx = - DOUBLE_TO_16_16(sf.shape[0][1]); mat.xy = - DOUBLE_TO_16_16(sf.shape[1][0]); mat.yy = DOUBLE_TO_16_16(sf.shape[1][1]); unscaled->have_shape = (mat.xx != 0x10000 || mat.yx != 0x00000 || mat.xy != 0x00000 || mat.yy != 0x10000); unscaled->Current_Shape = mat; cairo_matrix_init (&unscaled->current_shape, sf.shape[0][0], sf.shape[0][1], sf.shape[1][0], sf.shape[1][1], 0.0, 0.0); FT_Set_Transform(unscaled->face, &mat, NULL); error = FT_Set_Char_Size (unscaled->face, sf.x_scale * 64.0 + .5, sf.y_scale * 64.0 + .5, 0, 0); if (error) return _cairo_error (_cairo_ft_to_cairo_error (error)); return CAIRO_STATUS_SUCCESS; } /* we sometimes need to convert the glyph bitmap in a FT_GlyphSlot * into a different format. For example, we want to convert a * FT_PIXEL_MODE_LCD or FT_PIXEL_MODE_LCD_V bitmap into a 32-bit * ARGB or ABGR bitmap. * * this function prepares a target descriptor for this operation. * * input :: target bitmap descriptor. The function will set its * 'width', 'rows' and 'pitch' fields, and only these * * slot :: the glyph slot containing the source bitmap. this * function assumes that slot->format == FT_GLYPH_FORMAT_BITMAP * * mode :: the requested final rendering mode. supported values are * MONO, NORMAL (i.e. gray), LCD and LCD_V * * the function returns the size in bytes of the corresponding buffer, * it's up to the caller to allocate the corresponding memory block * before calling _fill_xrender_bitmap * * it also returns -1 in case of error (e.g. incompatible arguments, * like trying to convert a gray bitmap into a monochrome one) */ static int _compute_xrender_bitmap_size(FT_Bitmap *target, FT_GlyphSlot slot, FT_Render_Mode mode) { FT_Bitmap *ftbit; int width, height, pitch; if (slot->format != FT_GLYPH_FORMAT_BITMAP) return -1; /* compute the size of the final bitmap */ ftbit = &slot->bitmap; width = ftbit->width; height = ftbit->rows; pitch = (width + 3) & ~3; switch (ftbit->pixel_mode) { case FT_PIXEL_MODE_MONO: if (mode == FT_RENDER_MODE_MONO) { pitch = (((width + 31) & ~31) >> 3); break; } /* fall-through */ case FT_PIXEL_MODE_GRAY: if (mode == FT_RENDER_MODE_LCD || mode == FT_RENDER_MODE_LCD_V) { /* each pixel is replicated into a 32-bit ARGB value */ pitch = width * 4; } break; case FT_PIXEL_MODE_LCD: if (mode != FT_RENDER_MODE_LCD) return -1; /* horz pixel triplets are packed into 32-bit ARGB values */ width /= 3; pitch = width * 4; break; case FT_PIXEL_MODE_LCD_V: if (mode != FT_RENDER_MODE_LCD_V) return -1; /* vert pixel triplets are packed into 32-bit ARGB values */ height /= 3; pitch = width * 4; break; #ifdef FT_LOAD_COLOR case FT_PIXEL_MODE_BGRA: /* each pixel is replicated into a 32-bit ARGB value */ pitch = width * 4; break; #endif default: /* unsupported source format */ return -1; } target->width = width; target->rows = height; target->pitch = pitch; target->buffer = NULL; return pitch * height; } /* this functions converts the glyph bitmap found in a FT_GlyphSlot * into a different format (see _compute_xrender_bitmap_size) * * you should call this function after _compute_xrender_bitmap_size * * target :: target bitmap descriptor. Note that its 'buffer' pointer * must point to memory allocated by the caller * * slot :: the glyph slot containing the source bitmap * * mode :: the requested final rendering mode * * bgr :: boolean, set if BGR or VBGR pixel ordering is needed */ static void _fill_xrender_bitmap(FT_Bitmap *target, FT_GlyphSlot slot, FT_Render_Mode mode, int bgr) { FT_Bitmap *ftbit = &slot->bitmap; unsigned char *srcLine = ftbit->buffer; unsigned char *dstLine = target->buffer; int src_pitch = ftbit->pitch; int width = target->width; int height = target->rows; int pitch = target->pitch; int subpixel; int h; subpixel = (mode == FT_RENDER_MODE_LCD || mode == FT_RENDER_MODE_LCD_V); if (src_pitch < 0) srcLine -= src_pitch * (ftbit->rows - 1); target->pixel_mode = ftbit->pixel_mode; switch (ftbit->pixel_mode) { case FT_PIXEL_MODE_MONO: if (subpixel) { /* convert mono to ARGB32 values */ for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) { int x; for (x = 0; x < width; x++) { if (srcLine[(x >> 3)] & (0x80 >> (x & 7))) ((unsigned int *) dstLine)[x] = 0xffffffffU; } } target->pixel_mode = FT_PIXEL_MODE_LCD; } else if (mode == FT_RENDER_MODE_NORMAL) { /* convert mono to 8-bit gray */ for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) { int x; for (x = 0; x < width; x++) { if (srcLine[(x >> 3)] & (0x80 >> (x & 7))) dstLine[x] = 0xff; } } target->pixel_mode = FT_PIXEL_MODE_GRAY; } else { /* copy mono to mono */ int bytes = (width + 7) >> 3; for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) memcpy (dstLine, srcLine, bytes); } break; case FT_PIXEL_MODE_GRAY: if (subpixel) { /* convert gray to ARGB32 values */ for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) { int x; unsigned int *dst = (unsigned int *) dstLine; for (x = 0; x < width; x++) { unsigned int pix = srcLine[x]; pix |= (pix << 8); pix |= (pix << 16); dst[x] = pix; } } target->pixel_mode = FT_PIXEL_MODE_LCD; } else { /* copy gray into gray */ for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) memcpy (dstLine, srcLine, width); } break; case FT_PIXEL_MODE_LCD: if (!bgr) { /* convert horizontal RGB into ARGB32 */ for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) { int x; unsigned char *src = srcLine; unsigned int *dst = (unsigned int *) dstLine; for (x = 0; x < width; x++, src += 3) { unsigned int pix; pix = ((unsigned int)src[0] << 16) | ((unsigned int)src[1] << 8) | ((unsigned int)src[2] ) | ((unsigned int)src[1] << 24) ; dst[x] = pix; } } } else { /* convert horizontal BGR into ARGB32 */ for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) { int x; unsigned char *src = srcLine; unsigned int *dst = (unsigned int *) dstLine; for (x = 0; x < width; x++, src += 3) { unsigned int pix; pix = ((unsigned int)src[2] << 16) | ((unsigned int)src[1] << 8) | ((unsigned int)src[0] ) | ((unsigned int)src[1] << 24) ; dst[x] = pix; } } } break; case FT_PIXEL_MODE_LCD_V: /* convert vertical RGB into ARGB32 */ if (!bgr) { for (h = height; h > 0; h--, srcLine += 3 * src_pitch, dstLine += pitch) { int x; unsigned char* src = srcLine; unsigned int* dst = (unsigned int *) dstLine; for (x = 0; x < width; x++, src += 1) { unsigned int pix; pix = ((unsigned int)src[0] << 16) | ((unsigned int)src[src_pitch] << 8) | ((unsigned int)src[src_pitch*2] ) | ((unsigned int)src[src_pitch] << 24) ; dst[x] = pix; } } } else { for (h = height; h > 0; h--, srcLine += 3*src_pitch, dstLine += pitch) { int x; unsigned char *src = srcLine; unsigned int *dst = (unsigned int *) dstLine; for (x = 0; x < width; x++, src += 1) { unsigned int pix; pix = ((unsigned int)src[src_pitch * 2] << 16) | ((unsigned int)src[src_pitch] << 8) | ((unsigned int)src[0] ) | ((unsigned int)src[src_pitch] << 24) ; dst[x] = pix; } } } break; #ifdef FT_LOAD_COLOR case FT_PIXEL_MODE_BGRA: for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) memcpy (dstLine, srcLine, (size_t)width * 4); break; #endif default: assert (0); } } /* Fills in val->image with an image surface created from @bitmap */ static cairo_status_t _get_bitmap_surface (FT_Bitmap *bitmap, FT_Library library, cairo_bool_t own_buffer, cairo_font_options_t *font_options, cairo_image_surface_t **surface) { unsigned int width, height; unsigned char *data; int format = CAIRO_FORMAT_A8; int stride; cairo_image_surface_t *image; cairo_bool_t component_alpha = FALSE; width = bitmap->width; height = bitmap->rows; if (width == 0 || height == 0) { *surface = (cairo_image_surface_t *) cairo_image_surface_create_for_data (NULL, format, 0, 0, 0); return (*surface)->base.status; } switch (bitmap->pixel_mode) { case FT_PIXEL_MODE_MONO: stride = (((width + 31) & ~31) >> 3); if (own_buffer) { data = bitmap->buffer; assert (stride == bitmap->pitch); } else { data = _cairo_malloc_ab (height, stride); if (!data) return _cairo_error (CAIRO_STATUS_NO_MEMORY); if (stride == bitmap->pitch) { memcpy (data, bitmap->buffer, (size_t)stride * height); } else { int i; unsigned char *source, *dest; source = bitmap->buffer; dest = data; for (i = height; i; i--) { memcpy (dest, source, bitmap->pitch); memset (dest + bitmap->pitch, '\0', stride - bitmap->pitch); source += bitmap->pitch; dest += stride; } } } #ifndef WORDS_BIGENDIAN { uint8_t *d = data; int count = stride * height; while (count--) { *d = CAIRO_BITSWAP8 (*d); d++; } } #endif format = CAIRO_FORMAT_A1; break; case FT_PIXEL_MODE_LCD: case FT_PIXEL_MODE_LCD_V: case FT_PIXEL_MODE_GRAY: if (font_options->antialias != CAIRO_ANTIALIAS_SUBPIXEL || bitmap->pixel_mode == FT_PIXEL_MODE_GRAY) { stride = bitmap->pitch; /* We don't support stride not multiple of 4. */ if (stride & 3) { assert (!own_buffer); goto convert; } if (own_buffer) { data = bitmap->buffer; } else { data = _cairo_malloc_ab (height, stride); if (!data) return _cairo_error (CAIRO_STATUS_NO_MEMORY); memcpy (data, bitmap->buffer, (size_t)stride * height); } format = CAIRO_FORMAT_A8; } else { data = bitmap->buffer; stride = bitmap->pitch; format = CAIRO_FORMAT_ARGB32; component_alpha = TRUE; } break; #ifdef FT_LOAD_COLOR case FT_PIXEL_MODE_BGRA: stride = width * 4; if (own_buffer) { data = bitmap->buffer; } else { data = _cairo_malloc_ab (height, stride); if (!data) return _cairo_error (CAIRO_STATUS_NO_MEMORY); memcpy (data, bitmap->buffer, (size_t)stride * height); } if (!_cairo_is_little_endian ()) { /* Byteswap. */ unsigned int i, count = height * width; uint32_t *p = (uint32_t *) data; for (i = 0; i < count; i++) p[i] = bswap_32 (p[i]); } format = CAIRO_FORMAT_ARGB32; break; #endif case FT_PIXEL_MODE_GRAY2: case FT_PIXEL_MODE_GRAY4: convert: if (!own_buffer && library) { /* This is pretty much the only case that we can get in here. */ /* Convert to 8bit grayscale. */ FT_Bitmap tmp; FT_Int align; FT_Error error; format = CAIRO_FORMAT_A8; align = cairo_format_stride_for_width (format, bitmap->width); FT_Bitmap_New( &tmp ); error = FT_Bitmap_Convert( library, bitmap, &tmp, align ); if (error) return _cairo_error (_cairo_ft_to_cairo_error (error)); FT_Bitmap_Done( library, bitmap ); *bitmap = tmp; stride = bitmap->pitch; data = _cairo_malloc_ab (height, stride); if (!data) return _cairo_error (CAIRO_STATUS_NO_MEMORY); if (bitmap->num_grays != 256) { unsigned int x, y; unsigned int mul = 255 / (bitmap->num_grays - 1); FT_Byte *p = bitmap->buffer; for (y = 0; y < height; y++) { for (x = 0; x < width; x++) p[x] *= mul; p += bitmap->pitch; } } memcpy (data, bitmap->buffer, (size_t)stride * height); break; } /* fall through */ /* These could be triggered by very rare types of TrueType fonts */ default: if (own_buffer) free (bitmap->buffer); return _cairo_error (CAIRO_STATUS_INVALID_FORMAT); } /* XXX */ *surface = image = (cairo_image_surface_t *) cairo_image_surface_create_for_data (data, format, width, height, stride); if (image->base.status) { free (data); return (*surface)->base.status; } if (component_alpha) pixman_image_set_component_alpha (image->pixman_image, TRUE); _cairo_image_surface_assume_ownership_of_data (image); _cairo_debug_check_image_surface_is_defined (&image->base); return CAIRO_STATUS_SUCCESS; } /* Converts an outline FT_GlyphSlot into an image * * This could go through _render_glyph_bitmap as well, letting * FreeType convert the outline to a bitmap, but doing it ourselves * has two minor advantages: first, we save a copy of the bitmap * buffer: we can directly use the buffer that FreeType renders * into. * * Second, it may help when we add support for subpixel * rendering: the Xft code does it this way. (Keith thinks that * it may also be possible to get the subpixel rendering with * FT_Render_Glyph: something worth looking into in more detail * when we add subpixel support. If so, we may want to eliminate * this version of the code path entirely. */ static cairo_status_t _render_glyph_outline (FT_Face face, cairo_font_options_t *font_options, cairo_image_surface_t **surface) { int rgba = FC_RGBA_UNKNOWN; int lcd_filter = FT_LCD_FILTER_DEFAULT; FT_GlyphSlot glyphslot = face->glyph; FT_Outline *outline = &glyphslot->outline; FT_Bitmap bitmap; FT_BBox cbox; unsigned int width, height; cairo_status_t status; FT_Error error; FT_Library library = glyphslot->library; FT_Render_Mode render_mode = FT_RENDER_MODE_NORMAL; switch (font_options->antialias) { case CAIRO_ANTIALIAS_NONE: render_mode = FT_RENDER_MODE_MONO; break; case CAIRO_ANTIALIAS_SUBPIXEL: case CAIRO_ANTIALIAS_BEST: switch (font_options->subpixel_order) { case CAIRO_SUBPIXEL_ORDER_DEFAULT: case CAIRO_SUBPIXEL_ORDER_RGB: case CAIRO_SUBPIXEL_ORDER_BGR: render_mode = FT_RENDER_MODE_LCD; break; case CAIRO_SUBPIXEL_ORDER_VRGB: case CAIRO_SUBPIXEL_ORDER_VBGR: render_mode = FT_RENDER_MODE_LCD_V; break; } switch (font_options->lcd_filter) { case CAIRO_LCD_FILTER_NONE: lcd_filter = FT_LCD_FILTER_NONE; break; case CAIRO_LCD_FILTER_INTRA_PIXEL: lcd_filter = FT_LCD_FILTER_LEGACY; break; case CAIRO_LCD_FILTER_FIR3: lcd_filter = FT_LCD_FILTER_LIGHT; break; case CAIRO_LCD_FILTER_DEFAULT: case CAIRO_LCD_FILTER_FIR5: lcd_filter = FT_LCD_FILTER_DEFAULT; break; } break; case CAIRO_ANTIALIAS_DEFAULT: case CAIRO_ANTIALIAS_GRAY: case CAIRO_ANTIALIAS_GOOD: case CAIRO_ANTIALIAS_FAST: render_mode = FT_RENDER_MODE_NORMAL; } FT_Outline_Get_CBox (outline, &cbox); cbox.xMin &= -64; cbox.yMin &= -64; cbox.xMax = (cbox.xMax + 63) & -64; cbox.yMax = (cbox.yMax + 63) & -64; width = (unsigned int) ((cbox.xMax - cbox.xMin) >> 6); height = (unsigned int) ((cbox.yMax - cbox.yMin) >> 6); if (width * height == 0) { cairo_format_t format; /* Looks like fb handles zero-sized images just fine */ switch (render_mode) { case FT_RENDER_MODE_MONO: format = CAIRO_FORMAT_A1; break; case FT_RENDER_MODE_LCD: case FT_RENDER_MODE_LCD_V: format= CAIRO_FORMAT_ARGB32; break; case FT_RENDER_MODE_LIGHT: case FT_RENDER_MODE_NORMAL: case FT_RENDER_MODE_MAX: #if HAVE_FT_RENDER_MODE_SDF case FT_RENDER_MODE_SDF: #endif default: format = CAIRO_FORMAT_A8; break; } (*surface) = (cairo_image_surface_t *) cairo_image_surface_create_for_data (NULL, format, 0, 0, 0); pixman_image_set_component_alpha ((*surface)->pixman_image, TRUE); if ((*surface)->base.status) return (*surface)->base.status; } else { int bitmap_size; switch (render_mode) { case FT_RENDER_MODE_LCD: if (font_options->subpixel_order == CAIRO_SUBPIXEL_ORDER_BGR) rgba = FC_RGBA_BGR; else rgba = FC_RGBA_RGB; break; case FT_RENDER_MODE_LCD_V: if (font_options->subpixel_order == CAIRO_SUBPIXEL_ORDER_VBGR) rgba = FC_RGBA_VBGR; else rgba = FC_RGBA_VRGB; break; case FT_RENDER_MODE_MONO: case FT_RENDER_MODE_LIGHT: case FT_RENDER_MODE_NORMAL: case FT_RENDER_MODE_MAX: #if HAVE_FT_RENDER_MODE_SDF case FT_RENDER_MODE_SDF: #endif default: break; } #if HAVE_FT_LIBRARY_SETLCDFILTER FT_Library_SetLcdFilter (library, lcd_filter); #endif error = FT_Render_Glyph (face->glyph, render_mode); #if HAVE_FT_LIBRARY_SETLCDFILTER FT_Library_SetLcdFilter (library, FT_LCD_FILTER_NONE); #endif if (error) return _cairo_error (_cairo_ft_to_cairo_error (error)); bitmap_size = _compute_xrender_bitmap_size (&bitmap, face->glyph, render_mode); if (bitmap_size < 0) return _cairo_error (CAIRO_STATUS_INVALID_FORMAT); bitmap.buffer = calloc (1, bitmap_size); if (bitmap.buffer == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _fill_xrender_bitmap (&bitmap, face->glyph, render_mode, (rgba == FC_RGBA_BGR || rgba == FC_RGBA_VBGR)); /* Note: * _get_bitmap_surface will free bitmap.buffer if there is an error */ status = _get_bitmap_surface (&bitmap, NULL, TRUE, font_options, surface); if (unlikely (status)) return status; /* Note: the font's coordinate system is upside down from ours, so the * Y coordinate of the control box needs to be negated. Moreover, device * offsets are position of glyph origin relative to top left while xMin * and yMax are offsets of top left relative to origin. Another negation. */ cairo_surface_set_device_offset (&(*surface)->base, (double)-glyphslot->bitmap_left, (double)+glyphslot->bitmap_top); } return CAIRO_STATUS_SUCCESS; } /* Converts a bitmap (or other) FT_GlyphSlot into an image */ static cairo_status_t _render_glyph_bitmap (FT_Face face, cairo_font_options_t *font_options, cairo_image_surface_t **surface) { FT_GlyphSlot glyphslot = face->glyph; cairo_status_t status; FT_Error error; /* According to the FreeType docs, glyphslot->format could be * something other than FT_GLYPH_FORMAT_OUTLINE or * FT_GLYPH_FORMAT_BITMAP. Calling FT_Render_Glyph gives FreeType * the opportunity to convert such to * bitmap. FT_GLYPH_FORMAT_COMPOSITE will not be encountered since * we avoid the FT_LOAD_NO_RECURSE flag. */ error = FT_Render_Glyph (glyphslot, FT_RENDER_MODE_NORMAL); /* XXX ignoring all other errors for now. They are not fatal, typically * just a glyph-not-found. */ if (error == FT_Err_Out_Of_Memory) return _cairo_error (CAIRO_STATUS_NO_MEMORY); status = _get_bitmap_surface (&glyphslot->bitmap, glyphslot->library, FALSE, font_options, surface); if (unlikely (status)) return status; /* * Note: the font's coordinate system is upside down from ours, so the * Y coordinate of the control box needs to be negated. Moreover, device * offsets are position of glyph origin relative to top left while * bitmap_left and bitmap_top are offsets of top left relative to origin. * Another negation. */ cairo_surface_set_device_offset (&(*surface)->base, -glyphslot->bitmap_left, +glyphslot->bitmap_top); return CAIRO_STATUS_SUCCESS; } static cairo_status_t _transform_glyph_bitmap (cairo_matrix_t * shape, cairo_image_surface_t ** surface) { cairo_matrix_t original_to_transformed; cairo_matrix_t transformed_to_original; cairo_image_surface_t *old_image; cairo_surface_t *image; double x[4], y[4]; double origin_x, origin_y; int orig_width, orig_height; int i; int x_min, y_min, x_max, y_max; int width, height; cairo_status_t status; cairo_surface_pattern_t pattern; /* We want to compute a transform that takes the origin * (device_x_offset, device_y_offset) to 0,0, then applies * the "shape" portion of the font transform */ original_to_transformed = *shape; cairo_surface_get_device_offset (&(*surface)->base, &origin_x, &origin_y); orig_width = (*surface)->width; orig_height = (*surface)->height; cairo_matrix_translate (&original_to_transformed, -origin_x, -origin_y); /* Find the bounding box of the original bitmap under that * transform */ x[0] = 0; y[0] = 0; x[1] = orig_width; y[1] = 0; x[2] = orig_width; y[2] = orig_height; x[3] = 0; y[3] = orig_height; for (i = 0; i < 4; i++) cairo_matrix_transform_point (&original_to_transformed, &x[i], &y[i]); x_min = floor (x[0]); y_min = floor (y[0]); x_max = ceil (x[0]); y_max = ceil (y[0]); for (i = 1; i < 4; i++) { if (x[i] < x_min) x_min = floor (x[i]); else if (x[i] > x_max) x_max = ceil (x[i]); if (y[i] < y_min) y_min = floor (y[i]); else if (y[i] > y_max) y_max = ceil (y[i]); } /* Adjust the transform so that the bounding box starts at 0,0 ... * this gives our final transform from original bitmap to transformed * bitmap. */ original_to_transformed.x0 -= x_min; original_to_transformed.y0 -= y_min; /* Create the transformed bitmap */ width = x_max - x_min; height = y_max - y_min; transformed_to_original = original_to_transformed; status = cairo_matrix_invert (&transformed_to_original); if (unlikely (status)) return status; if ((*surface)->format == CAIRO_FORMAT_ARGB32 && !pixman_image_get_component_alpha ((*surface)->pixman_image)) image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height); else image = cairo_image_surface_create (CAIRO_FORMAT_A8, width, height); if (unlikely (image->status)) return image->status; /* Draw the original bitmap transformed into the new bitmap */ _cairo_pattern_init_for_surface (&pattern, &(*surface)->base); cairo_pattern_set_matrix (&pattern.base, &transformed_to_original); status = _cairo_surface_paint (image, CAIRO_OPERATOR_SOURCE, &pattern.base, NULL); _cairo_pattern_fini (&pattern.base); if (unlikely (status)) { cairo_surface_destroy (image); return status; } /* Now update the cache entry for the new bitmap, recomputing * the origin based on the final transform. */ cairo_matrix_transform_point (&original_to_transformed, &origin_x, &origin_y); old_image = (*surface); (*surface) = (cairo_image_surface_t *)image; /* Note: we converted subpixel-rendered RGBA images to grayscale, * so, no need to copy component alpha to new image. */ cairo_surface_destroy (&old_image->base); cairo_surface_set_device_offset (&(*surface)->base, _cairo_lround (origin_x), _cairo_lround (origin_y)); return CAIRO_STATUS_SUCCESS; } static const cairo_unscaled_font_backend_t cairo_ft_unscaled_font_backend = { _cairo_ft_unscaled_font_destroy, #if 0 _cairo_ft_unscaled_font_create_glyph #endif }; /* #cairo_ft_scaled_font_t */ typedef struct _cairo_ft_scaled_font { cairo_scaled_font_t base; cairo_ft_unscaled_font_t *unscaled; cairo_ft_options_t ft_options; } cairo_ft_scaled_font_t; static const cairo_scaled_font_backend_t _cairo_ft_scaled_font_backend; #if CAIRO_HAS_FC_FONT /* The load flags passed to FT_Load_Glyph control aspects like hinting and * antialiasing. Here we compute them from the fields of a FcPattern. */ static void _get_pattern_ft_options (FcPattern *pattern, cairo_ft_options_t *ret) { FcBool antialias, vertical_layout, hinting, autohint, bitmap, embolden; cairo_ft_options_t ft_options; int rgba; #ifdef FC_HINT_STYLE int hintstyle; #endif char *variations; _cairo_font_options_init_default (&ft_options.base); ft_options.load_flags = FT_LOAD_DEFAULT; ft_options.synth_flags = 0; #ifndef FC_EMBEDDED_BITMAP #define FC_EMBEDDED_BITMAP "embeddedbitmap" #endif /* Check whether to force use of embedded bitmaps */ if (FcPatternGetBool (pattern, FC_EMBEDDED_BITMAP, 0, &bitmap) != FcResultMatch) bitmap = FcFalse; /* disable antialiasing if requested */ if (FcPatternGetBool (pattern, FC_ANTIALIAS, 0, &antialias) != FcResultMatch) antialias = FcTrue; if (antialias) { cairo_subpixel_order_t subpixel_order; int lcd_filter; /* disable hinting if requested */ if (FcPatternGetBool (pattern, FC_HINTING, 0, &hinting) != FcResultMatch) hinting = FcTrue; if (FcPatternGetInteger (pattern, FC_RGBA, 0, &rgba) != FcResultMatch) rgba = FC_RGBA_UNKNOWN; switch (rgba) { case FC_RGBA_RGB: subpixel_order = CAIRO_SUBPIXEL_ORDER_RGB; break; case FC_RGBA_BGR: subpixel_order = CAIRO_SUBPIXEL_ORDER_BGR; break; case FC_RGBA_VRGB: subpixel_order = CAIRO_SUBPIXEL_ORDER_VRGB; break; case FC_RGBA_VBGR: subpixel_order = CAIRO_SUBPIXEL_ORDER_VBGR; break; case FC_RGBA_UNKNOWN: case FC_RGBA_NONE: default: subpixel_order = CAIRO_SUBPIXEL_ORDER_DEFAULT; break; } if (subpixel_order != CAIRO_SUBPIXEL_ORDER_DEFAULT) { ft_options.base.subpixel_order = subpixel_order; ft_options.base.antialias = CAIRO_ANTIALIAS_SUBPIXEL; } if (FcPatternGetInteger (pattern, FC_LCD_FILTER, 0, &lcd_filter) == FcResultMatch) { switch (lcd_filter) { case FC_LCD_NONE: ft_options.base.lcd_filter = CAIRO_LCD_FILTER_NONE; break; case FC_LCD_DEFAULT: ft_options.base.lcd_filter = CAIRO_LCD_FILTER_FIR5; break; case FC_LCD_LIGHT: ft_options.base.lcd_filter = CAIRO_LCD_FILTER_FIR3; break; case FC_LCD_LEGACY: ft_options.base.lcd_filter = CAIRO_LCD_FILTER_INTRA_PIXEL; break; } } #ifdef FC_HINT_STYLE if (FcPatternGetInteger (pattern, FC_HINT_STYLE, 0, &hintstyle) != FcResultMatch) hintstyle = FC_HINT_FULL; if (!hinting) hintstyle = FC_HINT_NONE; switch (hintstyle) { case FC_HINT_NONE: ft_options.base.hint_style = CAIRO_HINT_STYLE_NONE; break; case FC_HINT_SLIGHT: ft_options.base.hint_style = CAIRO_HINT_STYLE_SLIGHT; break; case FC_HINT_MEDIUM: default: ft_options.base.hint_style = CAIRO_HINT_STYLE_MEDIUM; break; case FC_HINT_FULL: ft_options.base.hint_style = CAIRO_HINT_STYLE_FULL; break; } #else /* !FC_HINT_STYLE */ if (!hinting) { ft_options.base.hint_style = CAIRO_HINT_STYLE_NONE; } #endif /* FC_HINT_STYLE */ /* Force embedded bitmaps off if no hinting requested */ if (ft_options.base.hint_style == CAIRO_HINT_STYLE_NONE) bitmap = FcFalse; if (!bitmap) ft_options.load_flags |= FT_LOAD_NO_BITMAP; } else { ft_options.base.antialias = CAIRO_ANTIALIAS_NONE; } /* force autohinting if requested */ if (FcPatternGetBool (pattern, FC_AUTOHINT, 0, &autohint) != FcResultMatch) autohint = FcFalse; if (autohint) ft_options.load_flags |= FT_LOAD_FORCE_AUTOHINT; if (FcPatternGetBool (pattern, FC_VERTICAL_LAYOUT, 0, &vertical_layout) != FcResultMatch) vertical_layout = FcFalse; if (vertical_layout) ft_options.load_flags |= FT_LOAD_VERTICAL_LAYOUT; #ifndef FC_EMBOLDEN #define FC_EMBOLDEN "embolden" #endif if (FcPatternGetBool (pattern, FC_EMBOLDEN, 0, &embolden) != FcResultMatch) embolden = FcFalse; if (embolden) ft_options.synth_flags |= CAIRO_FT_SYNTHESIZE_BOLD; #ifndef FC_FONT_VARIATIONS #define FC_FONT_VARIATIONS "fontvariations" #endif if (FcPatternGetString (pattern, FC_FONT_VARIATIONS, 0, (FcChar8 **) &variations) == FcResultMat ft_options.base.variations = strdup (variations); } *ret = ft_options; } #endif static void _cairo_ft_options_merge (cairo_ft_options_t *options, cairo_ft_options_t *other) { int load_flags = other->load_flags; int load_target = FT_LOAD_TARGET_NORMAL; /* clear load target mode */ load_flags &= ~(FT_LOAD_TARGET_(FT_LOAD_TARGET_MODE(other->load_flags))); if (load_flags & FT_LOAD_NO_HINTING) other->base.hint_style = CAIRO_HINT_STYLE_NONE; if (other->base.antialias == CAIRO_ANTIALIAS_NONE || options->base.antialias == CAIRO_ANTIALIAS_NONE) { options->base.antialias = CAIRO_ANTIALIAS_NONE; options->base.subpixel_order = CAIRO_SUBPIXEL_ORDER_DEFAULT; } if (other->base.antialias == CAIRO_ANTIALIAS_SUBPIXEL && options->base.antialias == CAIRO_ANTIALIAS_DEFAULT) { options->base.antialias = CAIRO_ANTIALIAS_SUBPIXEL; options->base.subpixel_order = other->base.subpixel_order; } if (options->base.hint_style == CAIRO_HINT_STYLE_DEFAULT) options->base.hint_style = other->base.hint_style; if (other->base.hint_style == CAIRO_HINT_STYLE_NONE) options->base.hint_style = CAIRO_HINT_STYLE_NONE; if (options->base.lcd_filter == CAIRO_LCD_FILTER_DEFAULT) options->base.lcd_filter = other->base.lcd_filter; if (other->base.lcd_filter == CAIRO_LCD_FILTER_NONE) options->base.lcd_filter = CAIRO_LCD_FILTER_NONE; if (options->base.antialias == CAIRO_ANTIALIAS_NONE) { if (options->base.hint_style == CAIRO_HINT_STYLE_NONE) load_flags |= FT_LOAD_NO_HINTING; else load_target = FT_LOAD_TARGET_MONO; load_flags |= FT_LOAD_MONOCHROME; } else { switch (options->base.hint_style) { case CAIRO_HINT_STYLE_NONE: load_flags |= FT_LOAD_NO_HINTING; break; case CAIRO_HINT_STYLE_SLIGHT: load_target = FT_LOAD_TARGET_LIGHT; break; case CAIRO_HINT_STYLE_MEDIUM: break; case CAIRO_HINT_STYLE_FULL: case CAIRO_HINT_STYLE_DEFAULT: if (options->base.antialias == CAIRO_ANTIALIAS_SUBPIXEL) { switch (options->base.subpixel_order) { case CAIRO_SUBPIXEL_ORDER_DEFAULT: case CAIRO_SUBPIXEL_ORDER_RGB: case CAIRO_SUBPIXEL_ORDER_BGR: load_target = FT_LOAD_TARGET_LCD; break; case CAIRO_SUBPIXEL_ORDER_VRGB: case CAIRO_SUBPIXEL_ORDER_VBGR: load_target = FT_LOAD_TARGET_LCD_V; break; } } break; } } if (other->base.variations) { if (options->base.variations) { char *p; /* 'merge' variations by concatenating - later entries win */ p = malloc (strlen (other->base.variations) + strlen (options->base.variations) + 2); p[0] = 0; strcat (p, other->base.variations); strcat (p, ","); strcat (p, options->base.variations); free (options->base.variations); options->base.variations = p; } else { options->base.variations = strdup (other->base.variations); } } options->load_flags = load_flags | load_target; options->synth_flags = other->synth_flags; } static cairo_status_t _cairo_ft_font_face_scaled_font_create (void *abstract_font_face, const cairo_matrix_t *font_matrix, const cairo_matrix_t *ctm, const cairo_font_options_t *options, cairo_scaled_font_t **font_out) { cairo_ft_font_face_t *font_face = abstract_font_face; cairo_ft_scaled_font_t *scaled_font; FT_Face face; FT_Size_Metrics *metrics; cairo_font_extents_t fs_metrics; cairo_status_t status; cairo_ft_unscaled_font_t *unscaled; assert (font_face->unscaled); face = _cairo_ft_unscaled_font_lock_face (font_face->unscaled); if (unlikely (face == NULL)) /* backend error */ return _cairo_error (CAIRO_STATUS_NO_MEMORY); scaled_font = _cairo_malloc (sizeof (cairo_ft_scaled_font_t)); if (unlikely (scaled_font == NULL)) { status = _cairo_error (CAIRO_STATUS_NO_MEMORY); goto FAIL; } scaled_font->unscaled = unscaled = font_face->unscaled; _cairo_unscaled_font_reference (&unscaled->base); _cairo_font_options_init_copy (&scaled_font->ft_options.base, options); _cairo_ft_options_merge (&scaled_font->ft_options, &font_face->ft_options); status = _cairo_scaled_font_init (&scaled_font->base, &font_face->base, font_matrix, ctm, options, &_cairo_ft_scaled_font_backend); if (unlikely (status)) goto CLEANUP_SCALED_FONT; status = _cairo_ft_unscaled_font_set_scale (unscaled, &scaled_font->base.scale); if (unlikely (status)) { /* This can only fail if we encounter an error with the underlying * font, so propagate the error back to the font-face. */ _cairo_ft_unscaled_font_unlock_face (unscaled); _cairo_unscaled_font_destroy (&unscaled->base); free (scaled_font); return status; } metrics = &face->size->metrics; /* * Get to unscaled metrics so that the upper level can get back to * user space * * Also use this path for bitmap-only fonts. The other branch uses * face members that are only relevant for scalable fonts. This is * detected by simply checking for units_per_EM==0. */ if (scaled_font->base.options.hint_metrics != CAIRO_HINT_METRICS_OFF || face->units_per_EM == 0) { double x_factor, y_factor; if (unscaled->x_scale == 0) x_factor = 0; else x_factor = 1 / unscaled->x_scale; if (unscaled->y_scale == 0) y_factor = 0; else y_factor = 1 / unscaled->y_scale; fs_metrics.ascent = DOUBLE_FROM_26_6(metrics->ascender) * y_factor; fs_metrics.descent = DOUBLE_FROM_26_6(- metrics->descender) * y_factor; fs_metrics.height = DOUBLE_FROM_26_6(metrics->height) * y_factor; if (!_cairo_ft_scaled_font_is_vertical (&scaled_font->base)) { fs_metrics.max_x_advance = DOUBLE_FROM_26_6(metrics->max_advance) * x_factor; fs_metrics.max_y_advance = 0; } else { fs_metrics.max_x_advance = 0; fs_metrics.max_y_advance = DOUBLE_FROM_26_6(metrics->max_advance) * y_factor; } } else { double scale = face->units_per_EM; fs_metrics.ascent = face->ascender / scale; fs_metrics.descent = - face->descender / scale; fs_metrics.height = face->height / scale; if (!_cairo_ft_scaled_font_is_vertical (&scaled_font->base)) { fs_metrics.max_x_advance = face->max_advance_width / scale; fs_metrics.max_y_advance = 0; } else { fs_metrics.max_x_advance = 0; fs_metrics.max_y_advance = face->max_advance_height / scale; } } status = _cairo_scaled_font_set_metrics (&scaled_font->base, &fs_metrics); if (unlikely (status)) goto CLEANUP_SCALED_FONT; _cairo_ft_unscaled_font_unlock_face (unscaled); *font_out = &scaled_font->base; return CAIRO_STATUS_SUCCESS; CLEANUP_SCALED_FONT: _cairo_unscaled_font_destroy (&unscaled->base); free (scaled_font); FAIL: _cairo_ft_unscaled_font_unlock_face (font_face->unscaled); *font_out = _cairo_scaled_font_create_in_error (status); return CAIRO_STATUS_SUCCESS; /* non-backend error */ } cairo_bool_t _cairo_scaled_font_is_ft (cairo_scaled_font_t *scaled_font) { return scaled_font->backend == &_cairo_ft_scaled_font_backend; } static void _cairo_ft_scaled_font_fini (void *abstract_font) { cairo_ft_scaled_font_t *scaled_font = abstract_font; if (scaled_font == NULL) return; _cairo_font_options_fini (&scaled_font->ft_options.base); _cairo_unscaled_font_destroy (&scaled_font->unscaled->base); } static int _move_to (FT_Vector *to, void *closure) { cairo_path_fixed_t *path = closure; cairo_fixed_t x, y; x = _cairo_fixed_from_26_6 (to->x); y = _cairo_fixed_from_26_6 (to->y); if (_cairo_path_fixed_close_path (path) != CAIRO_STATUS_SUCCESS) return 1; if (_cairo_path_fixed_move_to (path, x, y) != CAIRO_STATUS_SUCCESS) return 1; return 0; } static int _line_to (FT_Vector *to, void *closure) { cairo_path_fixed_t *path = closure; cairo_fixed_t x, y; x = _cairo_fixed_from_26_6 (to->x); y = _cairo_fixed_from_26_6 (to->y); if (_cairo_path_fixed_line_to (path, x, y) != CAIRO_STATUS_SUCCESS) return 1; return 0; } static int _conic_to (FT_Vector *control, FT_Vector *to, void *closure) { cairo_path_fixed_t *path = closure; cairo_fixed_t x0, y0; cairo_fixed_t x1, y1; cairo_fixed_t x2, y2; cairo_fixed_t x3, y3; cairo_point_t conic; if (! _cairo_path_fixed_get_current_point (path, &x0, &y0)) return 1; conic.x = _cairo_fixed_from_26_6 (control->x); conic.y = _cairo_fixed_from_26_6 (control->y); x3 = _cairo_fixed_from_26_6 (to->x); y3 = _cairo_fixed_from_26_6 (to->y); x1 = x0 + 2.0/3.0 * (conic.x - x0); y1 = y0 + 2.0/3.0 * (conic.y - y0); x2 = x3 + 2.0/3.0 * (conic.x - x3); y2 = y3 + 2.0/3.0 * (conic.y - y3); if (_cairo_path_fixed_curve_to (path, x1, y1, x2, y2, x3, y3) != CAIRO_STATUS_SUCCESS) return 1; return 0; } static int _cubic_to (FT_Vector *control1, FT_Vector *control2, FT_Vector *to, void *closure) { cairo_path_fixed_t *path = closure; cairo_fixed_t x0, y0; cairo_fixed_t x1, y1; cairo_fixed_t x2, y2; x0 = _cairo_fixed_from_26_6 (control1->x); y0 = _cairo_fixed_from_26_6 (control1->y); x1 = _cairo_fixed_from_26_6 (control2->x); y1 = _cairo_fixed_from_26_6 (control2->y); x2 = _cairo_fixed_from_26_6 (to->x); y2 = _cairo_fixed_from_26_6 (to->y); if (_cairo_path_fixed_curve_to (path, x0, y0, x1, y1, x2, y2) != CAIRO_STATUS_SUCCESS) return 1; return 0; } cairo_status_t _cairo_ft_face_decompose_glyph_outline (FT_Face face, cairo_path_fixed_t **pathp) { static const FT_Outline_Funcs outline_funcs = { (FT_Outline_MoveToFunc)_move_to, (FT_Outline_LineToFunc)_line_to, (FT_Outline_ConicToFunc)_conic_to, (FT_Outline_CubicToFunc)_cubic_to, 0, /* shift */ 0, /* delta */ }; static const FT_Matrix invert_y = { DOUBLE_TO_16_16 (1.0), 0, 0, DOUBLE_TO_16_16 (-1.0), }; FT_GlyphSlot glyph; cairo_path_fixed_t *path; cairo_status_t status; path = _cairo_path_fixed_create (); if (!path) return _cairo_error (CAIRO_STATUS_NO_MEMORY); glyph = face->glyph; /* Font glyphs have an inverted Y axis compared to cairo. */ FT_Outline_Transform (&glyph->outline, &invert_y); if (FT_Outline_Decompose (&glyph->outline, &outline_funcs, path)) { _cairo_path_fixed_destroy (path); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } status = _cairo_path_fixed_close_path (path); if (unlikely (status)) { _cairo_path_fixed_destroy (path); return status; } *pathp = path; return CAIRO_STATUS_SUCCESS; } /* * Translate glyph to match its metrics. */ static void _cairo_ft_scaled_glyph_vertical_layout_bearing_fix (void *abstract_font, FT_GlyphSlot glyph) { cairo_ft_scaled_font_t *scaled_font = abstract_font; FT_Vector vector; vector.x = glyph->metrics.vertBearingX - glyph->metrics.horiBearingX; vector.y = -glyph->metrics.vertBearingY - glyph->metrics.horiBearingY; if (glyph->format == FT_GLYPH_FORMAT_OUTLINE) { FT_Vector_Transform (&vector, &scaled_font->unscaled->Current_Shape); FT_Outline_Translate(&glyph->outline, vector.x, vector.y); } else if (glyph->format == FT_GLYPH_FORMAT_BITMAP) { glyph->bitmap_left += vector.x / 64; glyph->bitmap_top += vector.y / 64; } } static void cairo_ft_apply_variations (FT_Face face, cairo_ft_scaled_font_t *scaled_font) { FT_MM_Var *ft_mm_var; FT_Error ret; unsigned int instance_id = scaled_font->unscaled->id >> 16; static GetVarFunc getVar; static DoneVarFunc doneVar; static GetVarDesignCoordsFunc getVarDesignCoords; static SetVarDesignCoordsFunc setVarDesignCoords; static int firstTime = 1; if (firstTime) { getVar = (GetVarFunc) dlsym (RTLD_DEFAULT, "FT_Get_MM_Var"); doneVar = (DoneVarFunc) dlsym (RTLD_DEFAULT, "FT_Done_MM_Var"); getVarDesignCoords = (GetVarDesignCoordsFunc) dlsym (RTLD_DEFAULT, "FT_Get_Var_Design setVarDesignCoords = (SetVarDesignCoordsFunc) dlsym (RTLD_DEFAULT, "FT_Set_Var_Design firstTime = 0; } if (!getVar || !setVarDesignCoords) return; ret = (*getVar) (face, &ft_mm_var); if (ret == 0) { FT_Fixed *current_coords; FT_Fixed *coords; unsigned int i; const char *p; coords = malloc (sizeof (FT_Fixed) * ft_mm_var->num_axis); /* FIXME check coords. */ if (scaled_font->unscaled->variations) { memcpy (coords, scaled_font->unscaled->variations, ft_mm_var->num_axis * sizeof (*coords) } else if (instance_id && instance_id <= ft_mm_var->num_namedstyles) { FT_Var_Named_Style *instance = &ft_mm_var->namedstyle[instance_id - 1]; memcpy (coords, instance->coords, ft_mm_var->num_axis * sizeof (*coords)); } else for (i = 0; i < ft_mm_var->num_axis; i++) coords[i] = ft_mm_var->axis[i].def; p = scaled_font->ft_options.base.variations; while (p && *p) { const char *start; const char *end, *end2; FT_ULong tag; double value; while (_cairo_isspace (*p)) p++; start = p; end = strchr (p, ','); if (end && (end - p < 6)) goto skip; tag = FT_MAKE_TAG(p[0], p[1], p[2], p[3]); p += 4; while (_cairo_isspace (*p)) p++; if (*p == '=') p++; if (p - start < 5) goto skip; value = _cairo_strtod (p, (char **) &end2); while (end2 && _cairo_isspace (*end2)) end2++; if (end2 && (*end2 != ',' && *end2 != '\0')) goto skip; for (i = 0; i < ft_mm_var->num_axis; i++) { if (ft_mm_var->axis[i].tag == tag) { coords[i] = (FT_Fixed)(value*65536); break; } } skip: p = end ? end + 1 : NULL; } current_coords = malloc (sizeof (FT_Fixed) * ft_mm_var->num_axis); if (getVarDesignCoords) { ret = (*getVarDesignCoords) (face, ft_mm_var->num_axis, current_coords); if (ret == 0) { for (i = 0; i < ft_mm_var->num_axis; i++) { if (coords[i] != current_coords[i]) break; } if (i == ft_mm_var->num_axis) goto done; } } (*setVarDesignCoords) (face, ft_mm_var->num_axis, coords); done: free (coords); free (current_coords); if (doneVar) (*doneVar) (face->glyph->library, ft_mm_var); else free (ft_mm_var); } } static cairo_int_status_t _cairo_ft_scaled_glyph_load_glyph (cairo_ft_scaled_font_t *scaled_font, cairo_scaled_glyph_t *scaled_glyph, FT_Face face, int load_flags, cairo_bool_t use_em_size, cairo_bool_t vertical_layout) { FT_Error error; cairo_status_t status; if (use_em_size) { cairo_matrix_t em_size; cairo_matrix_init_scale (&em_size, face->units_per_EM, face->units_per_EM); status = _cairo_ft_unscaled_font_set_scale (scaled_font->unscaled, &em_size); } else { status = _cairo_ft_unscaled_font_set_scale (scaled_font->unscaled, &scaled_font->base.scale); } if (unlikely (status)) return status; cairo_ft_apply_variations (face, scaled_font); error = FT_Load_Glyph (face, _cairo_scaled_glyph_index(scaled_glyph), load_flags); /* XXX ignoring all other errors for now. They are not fatal, typically * just a glyph-not-found. */ if (error == FT_Err_Out_Of_Memory) return _cairo_error (CAIRO_STATUS_NO_MEMORY); /* * synthesize glyphs if requested */ #if HAVE_FT_GLYPHSLOT_EMBOLDEN if (scaled_font->ft_options.synth_flags & CAIRO_FT_SYNTHESIZE_BOLD) FT_GlyphSlot_Embolden (face->glyph); #endif #if HAVE_FT_GLYPHSLOT_OBLIQUE if (scaled_font->ft_options.synth_flags & CAIRO_FT_SYNTHESIZE_OBLIQUE) FT_GlyphSlot_Oblique (face->glyph); #endif if (vertical_layout) _cairo_ft_scaled_glyph_vertical_layout_bearing_fix (scaled_font, face->glyph); if (face->glyph->format == FT_GLYPH_FORMAT_OUTLINE) { FT_Pos xshift, yshift; xshift = _cairo_scaled_glyph_xphase (scaled_glyph) << 4; yshift = _cairo_scaled_glyph_yphase (scaled_glyph) << 4; FT_Outline_Translate (&face->glyph->outline, xshift, -yshift); } return CAIRO_STATUS_SUCCESS; } typedef enum { CAIRO_FT_GLYPH_TYPE_BITMAP, CAIRO_FT_GLYPH_TYPE_OUTLINE, CAIRO_FT_GLYPH_TYPE_SVG, CAIRO_FT_GLYPH_TYPE_COLR_V0, CAIRO_FT_GLYPH_TYPE_COLR_V1, } cairo_ft_glyph_format_t; typedef struct { cairo_scaled_glyph_private_t base; cairo_ft_glyph_format_t format; } cairo_ft_glyph_private_t; static void _cairo_ft_glyph_fini (cairo_scaled_glyph_private_t *glyph_private, cairo_scaled_glyph_t *glyph, cairo_scaled_font_t *font) { cairo_list_del (&glyph_private->link); free (glyph_private); } #ifdef FT_COLOR_H static void _cairo_ft_scaled_glyph_set_palette (cairo_ft_scaled_font_t *scaled_font, FT_Face face, unsigned int *num_entries_ret, FT_Color **entries_ret) { unsigned int num_entries = 0; FT_Color *entries = NULL; #ifdef HAVE_FT_PALETTE_SELECT FT_Palette_Data palette_data; if (FT_Palette_Data_Get (face, &palette_data) == 0 && palette_data.num_palettes > 0) { FT_UShort palette_index = CAIRO_COLOR_PALETTE_DEFAULT; if (scaled_font->base.options.palette_index < palette_data.num_palettes) palette_index = scaled_font->base.options.palette_index; if (FT_Palette_Select (face, palette_index, &entries) == 0) { num_entries = palette_data.num_palette_entries; /* Overlay custom colors */ for (unsigned int i = 0; i < scaled_font->base.options.custom_palette_size; i++) { cairo_palette_color_t *entry = &scaled_font->base.options.custom_palette[i]; if (entry->index < num_entries) { entries[entry->index].red = 255 * entry->red; entries[entry->index].green = 255 * entry->green; entries[entry->index].blue = 255 * entry->blue; entries[entry->index].alpha = 255 * entry->alpha; } } } } #endif if (num_entries_ret) *num_entries_ret = num_entries; if (entries_ret) *entries_ret = entries; } #else static void _cairo_ft_scaled_glyph_set_palette (cairo_ft_scaled_font_t *scaled_font, FT_Face face, unsigned int *num_entries_ret, void **entries_ret) { if (num_entries_ret) *num_entries_ret = 0; if (entries_ret) *entries_ret = NULL; } #endif /* returns TRUE if foreground color used */ static cairo_bool_t _cairo_ft_scaled_glyph_set_foreground_color (cairo_ft_scaled_font_t *scaled_font, cairo_scaled_glyph_t *scaled_glyph, FT_Face face, const cairo_color_t *foreground_color) { cairo_bool_t uses_foreground_color = FALSE; #ifdef HAVE_FT_PALETTE_SELECT FT_LayerIterator iterator; FT_UInt layer_glyph_index; FT_UInt layer_color_index; FT_Color color; /* Check if there is a layer that uses the foreground color */ iterator.p = NULL; while (FT_Get_Color_Glyph_Layer(face, _cairo_scaled_glyph_index (scaled_glyph), &layer_glyph_index, &layer_color_index, &iterator)) { if (layer_color_index == 0xFFFF) { uses_foreground_color = TRUE; break; } } if (uses_foreground_color) { color.red = (FT_Byte)(foreground_color->red * 0xFF); color.green = (FT_Byte)(foreground_color->green * 0xFF); color.blue = (FT_Byte)(foreground_color->blue * 0xFF); color.alpha = (FT_Byte)(foreground_color->alpha * 0xFF); FT_Palette_Set_Foreground_Color (face, color); } #endif return uses_foreground_color; } static cairo_int_status_t _cairo_ft_scaled_glyph_init_surface (cairo_ft_scaled_font_t *scaled_font, cairo_scaled_glyph_t *scaled_glyph, cairo_ft_glyph_private_t *glyph_priv, cairo_scaled_glyph_info_t info, FT_Face face, const cairo_color_t *foreground_color, cairo_bool_t vertical_layout, int load_flags) { cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled; FT_GlyphSlot glyph; cairo_status_t status; cairo_image_surface_t *surface; cairo_bool_t uses_foreground_color = FALSE; /* Only one info type at a time handled in this function */ assert (info == CAIRO_SCALED_GLYPH_INFO_COLOR_SURFACE || info == CAIRO_SCALED_GLYPH_INF if (info == CAIRO_SCALED_GLYPH_INFO_COLOR_SURFACE) { if (!unscaled->have_color) { scaled_glyph->color_glyph = FALSE; scaled_glyph->color_glyph_set = TRUE; return CAIRO_INT_STATUS_UNSUPPORTED; } uses_foreground_color = _cairo_ft_scaled_glyph_set_foreground_color (scaled_font, scaled_glyph, face, foreground_color); _cairo_ft_scaled_glyph_set_palette (scaled_font, face, NULL, NULL); load_flags &= ~FT_LOAD_MONOCHROME; /* clear load target mode */ load_flags &= ~(FT_LOAD_TARGET_(FT_LOAD_TARGET_MODE(load_flags))); load_flags |= FT_LOAD_TARGET_NORMAL; #ifdef FT_LOAD_COLOR load_flags |= FT_LOAD_COLOR; #endif } else { /* info == CAIRO_SCALED_GLYPH_INFO_SURFACE */ #ifdef FT_LOAD_COLOR load_flags &= ~FT_LOAD_COLOR; #endif } status = _cairo_ft_scaled_glyph_load_glyph (scaled_font, scaled_glyph, face, load_flags, FALSE, vertical_layout); if (unlikely (status)) return status; glyph = face->glyph; if (glyph_priv->format == CAIRO_FT_GLYPH_TYPE_OUTLINE) { status = _render_glyph_outline (face, &scaled_font->ft_options.base, &surface); } else { status = _render_glyph_bitmap (face, &scaled_font->ft_options.base, &surface); if (likely (status == CAIRO_STATUS_SUCCESS) && unscaled->have_shape) { status = _transform_glyph_bitmap (&unscaled->current_shape, &surface); if (unlikely (status)) cairo_surface_destroy (&surface->base); } } if (unlikely (status)) return status; if (info == CAIRO_SCALED_GLYPH_INFO_COLOR_SURFACE) { /* We tried loading a color glyph and can now check if we got * a color glyph and set scaled_glyph->color_glyph * accordingly */ if (pixman_image_get_format (surface->pixman_image) == PIXMAN_a8r8g8b8 && !pixman_image_get_component_alpha (surface->pixman_image)) { _cairo_scaled_glyph_set_color_surface (scaled_glyph, &scaled_font->base, surface, uses_foreground_color ? foreground_color : NULL); scaled_glyph->color_glyph = TRUE; } else { /* We didn't ask for a non-color surface, but store it * anyway so we don't have to load it again. */ _cairo_scaled_glyph_set_surface (scaled_glyph, &scaled_font->base, surface); scaled_glyph->color_glyph = FALSE; status = CAIRO_INT_STATUS_UNSUPPORTED; } scaled_glyph->color_glyph_set = TRUE; } else { /* info == CAIRO_SCALED_GLYPH_INFO_SURFACE */ _cairo_scaled_glyph_set_surface (scaled_glyph, &scaled_font->base, surface); } return status; } static cairo_int_status_t _cairo_ft_scaled_glyph_init_record_colr_v0_glyph (cairo_ft_scaled_font_t *scaled_f cairo_scaled_glyph_t *scaled_glyph, FT_Face face, cairo_bool_t vertical_layout, int load_flags) { #ifdef HAVE_FT_PALETTE_SELECT cairo_surface_t *recording_surface; cairo_t *cr; cairo_status_t status; FT_Color *palette; unsigned int num_palette_entries; FT_LayerIterator iterator; FT_UInt layer_glyph_index; FT_UInt layer_color_index; cairo_path_fixed_t *path_fixed; cairo_path_t *path; _cairo_ft_scaled_glyph_set_palette (scaled_font, face, &num_palette_entries, &palette); load_flags &= ~FT_LOAD_MONOCHROME; /* clear load target mode */ load_flags &= ~(FT_LOAD_TARGET_(FT_LOAD_TARGET_MODE(load_flags))); load_flags |= FT_LOAD_TARGET_NORMAL; load_flags |= FT_LOAD_COLOR; recording_surface = cairo_recording_surface_create (CAIRO_CONTENT_COLOR_ALPHA, NULL); cr = cairo_create (recording_surface); if (!_cairo_matrix_is_scale_0 (&scaled_font->base.scale)) { cairo_matrix_t scale; scale = scaled_font->base.scale; scale.x0 = scale.y0 = 0.; cairo_set_matrix (cr, &scale); } iterator.p = NULL; while (FT_Get_Color_Glyph_Layer(face, _cairo_scaled_glyph_index (scaled_glyph), &layer_glyph_index, &layer_color_index, &iterator)) { cairo_pattern_t *pattern; if (layer_color_index == 0xFFFF) { pattern = _cairo_pattern_create_foreground_marker (); } else { double r = 0, g = 0, b = 0, a = 1; if (layer_color_index < num_palette_entries) { FT_Color *color = &palette[layer_color_index]; r = color->red / 255.0; g = color->green/ 255.0; b = color->blue / 255.0; a = color->alpha / 255.0; } pattern = cairo_pattern_create_rgba (r, g, b, a); } cairo_set_source (cr, pattern); cairo_pattern_destroy (pattern); if (FT_Load_Glyph (face, layer_glyph_index, load_flags) != 0) { status = CAIRO_INT_STATUS_UNSUPPORTED; goto cleanup; } status = _cairo_ft_face_decompose_glyph_outline (face, &path_fixed); if (unlikely (status)) return status; path = _cairo_path_create (path_fixed, cr); _cairo_path_fixed_destroy (path_fixed); cairo_append_path(cr, path); cairo_path_destroy (path); cairo_fill (cr); } cleanup: cairo_destroy (cr); if (status) { cairo_surface_destroy (recording_surface); return status; } _cairo_scaled_glyph_set_recording_surface (scaled_glyph, &scaled_font->base, recording_surface, NULL); return status; #else return CAIRO_INT_STATUS_UNSUPPORTED; #endif } static cairo_int_status_t _cairo_ft_scaled_glyph_init_record_colr_v1_glyph (cairo_ft_scaled_font_t *scaled_f cairo_scaled_glyph_t *scaled_glyph, FT_Face face, const cairo_color_t *foreground_color, cairo_text_extents_t *extents) { #if HAVE_FT_COLR_V1 cairo_status_t status = CAIRO_STATUS_SUCCESS; cairo_surface_t *recording_surface; cairo_t *cr; FT_Color *palette; unsigned int num_palette_entries; cairo_bool_t foreground_source_used = FALSE; recording_surface = cairo_recording_surface_create (CAIRO_CONTENT_COLOR_ALPHA, NULL); cairo_surface_set_device_scale (recording_surface, 1, -1); cr = cairo_create (recording_surface); cairo_set_font_size (cr, 1.0); cairo_set_font_options (cr, &scaled_font->base.options); extents->x_bearing = DOUBLE_FROM_26_6(face->bbox.xMin); extents->y_bearing = DOUBLE_FROM_26_6(face->bbox.yMin); extents->width = DOUBLE_FROM_26_6(face->bbox.xMax) - extents->x_bearing; extents->height = DOUBLE_FROM_26_6(face->bbox.yMax) - extents->y_bearing; _cairo_ft_scaled_glyph_set_palette (scaled_font, face, &num_palette_entries, &palette); if (!_cairo_matrix_is_scale_0 (&scaled_font->base.scale)) { cairo_pattern_t *foreground_pattern = _cairo_pattern_create_solid (foreground_color) status = _cairo_render_colr_v1_glyph (face, _cairo_scaled_glyph_index (scaled_glyph), palette, num_palette_entries, cr, foreground_pattern, &foreground_source_used); cairo_pattern_destroy (foreground_pattern); if (status == CAIRO_STATUS_SUCCESS) status = cairo_status (cr); } cairo_destroy (cr); if (status) { cairo_surface_destroy (recording_surface); scaled_glyph->color_glyph = FALSE; scaled_glyph->color_glyph_set = TRUE; return status; } _cairo_scaled_glyph_set_recording_surface (scaled_glyph, &scaled_font->base, recording_surface, foreground_source_used ? foreground_color : NULL); scaled_glyph->color_glyph = TRUE; scaled_glyph->color_glyph_set = TRUE; /* get metrics */ /* Copied from cairo-user-font.c */ cairo_matrix_t extent_scale; double extent_x_scale; double extent_y_scale; double snap_x_scale; double snap_y_scale; double fixed_scale, x_scale, y_scale; extent_scale = scaled_font->base.scale_inverse; snap_x_scale = 1.0; snap_y_scale = 1.0; status = _cairo_matrix_compute_basis_scale_factors (&extent_scale, &x_scale, &y_scale, 1); if (status == CAIRO_STATUS_SUCCESS) { if (x_scale == 0) x_scale = 1; if (y_scale == 0) y_scale = 1; snap_x_scale = x_scale; snap_y_scale = y_scale; /* since glyphs are pretty much 1.0x1.0, we can reduce error by * scaling to a larger square. say, 1024.x1024. */ fixed_scale = 1024; x_scale /= fixed_scale; y_scale /= fixed_scale; cairo_matrix_scale (&extent_scale, 1.0 / x_scale, 1.0 / y_scale); extent_x_scale = x_scale; extent_y_scale = y_scale; } { /* compute width / height */ cairo_box_t bbox; double x1, y1, x2, y2; double x_scale, y_scale; /* Compute extents.x/y/width/height from recording_surface, * in font space. */ status = _cairo_recording_surface_get_bbox ((cairo_recording_surface_t *) recording_s &bbox, &extent_scale); if (unlikely (status)) return status; _cairo_box_to_doubles (&bbox, &x1, &y1, &x2, &y2); x_scale = extent_x_scale; y_scale = extent_y_scale; extents->x_bearing = x1 * x_scale; extents->y_bearing = y1 * y_scale; extents->width = (x2 - x1) * x_scale; extents->height = (y2 - y1) * y_scale; } if (scaled_font->base.options.hint_metrics != CAIRO_HINT_METRICS_OFF) { extents->x_advance = _cairo_lround (extents->x_advance / snap_x_scale) * snap_x_scale; extents->y_advance = _cairo_lround (extents->y_advance / snap_y_scale) * snap_y_scale; } return status; #else return CAIRO_INT_STATUS_UNSUPPORTED; #endif } static cairo_int_status_t _cairo_ft_scaled_glyph_init_record_svg_glyph (cairo_ft_scaled_font_t *scaled_font, cairo_scaled_glyph_t *scaled_glyph, FT_Face face, const cairo_color_t *foreground_color, cairo_text_extents_t *extents) { #if HAVE_FT_SVG_DOCUMENT cairo_status_t status = CAIRO_STATUS_SUCCESS; cairo_surface_t *recording_surface; cairo_t *cr; FT_SVG_Document svg_doc = face->glyph->other; char *svg_document; FT_Color *palette; unsigned int num_palette_entries; cairo_bool_t foreground_source_used = FALSE; /* Create NULL terminated SVG document */ svg_document = _cairo_strndup ((const char*)svg_doc->svg_document, svg_doc->svg_documen recording_surface = cairo_recording_surface_create (CAIRO_CONTENT_COLOR_ALPHA, NULL); cr = cairo_create (recording_surface); if (!_cairo_matrix_is_scale_0 (&scaled_font->base.scale)) { cairo_matrix_t scale; scale = scaled_font->base.scale; scale.x0 = scale.y0 = 0.; cairo_set_matrix (cr, &scale); } cairo_set_font_size (cr, 1.0); cairo_set_font_options (cr, &scaled_font->base.options); extents->x_bearing = DOUBLE_FROM_26_6(face->bbox.xMin); extents->y_bearing = DOUBLE_FROM_26_6(face->bbox.yMin); extents->width = DOUBLE_FROM_26_6(face->bbox.xMax) - extents->x_bearing; extents->height = DOUBLE_FROM_26_6(face->bbox.yMax) - extents->y_bearing; _cairo_ft_scaled_glyph_set_palette (scaled_font, face, &num_palette_entries, &palette); if (!_cairo_matrix_is_scale_0 (&scaled_font->base.scale)) { cairo_pattern_t *foreground_pattern = _cairo_pattern_create_solid (foreground_color) status = _cairo_render_svg_glyph (svg_document, svg_doc->start_glyph_id, svg_doc->end_glyph_id, _cairo_scaled_glyph_index(scaled_glyph), svg_doc->units_per_EM, palette, num_palette_entries, cr, foreground_pattern, &foreground_source_used); cairo_pattern_destroy (foreground_pattern); if (status == CAIRO_STATUS_SUCCESS) status = cairo_status (cr); } cairo_destroy (cr); free (svg_document); if (status) { cairo_surface_destroy (recording_surface); scaled_glyph->color_glyph = FALSE; scaled_glyph->color_glyph_set = TRUE; return status; } _cairo_scaled_glyph_set_recording_surface (scaled_glyph, &scaled_font->base, recording_surface, foreground_source_used ? foreground_color : NULL); scaled_glyph->color_glyph = TRUE; scaled_glyph->color_glyph_set = TRUE; /* get metrics */ /* Copied from cairo-user-font.c */ cairo_matrix_t extent_scale; double extent_x_scale; double extent_y_scale; double snap_x_scale; double snap_y_scale; double fixed_scale, x_scale, y_scale; extent_scale = scaled_font->base.scale_inverse; snap_x_scale = 1.0; snap_y_scale = 1.0; status = _cairo_matrix_compute_basis_scale_factors (&extent_scale, &x_scale, &y_scale, 1); if (status == CAIRO_STATUS_SUCCESS) { if (x_scale == 0) x_scale = 1; if (y_scale == 0) y_scale = 1; snap_x_scale = x_scale; snap_y_scale = y_scale; /* since glyphs are pretty much 1.0x1.0, we can reduce error by * scaling to a larger square. say, 1024.x1024. */ fixed_scale = 1024; x_scale /= fixed_scale; y_scale /= fixed_scale; cairo_matrix_scale (&extent_scale, 1.0 / x_scale, 1.0 / y_scale); extent_x_scale = x_scale; extent_y_scale = y_scale; } { /* compute width / height */ cairo_box_t bbox; double x1, y1, x2, y2; double x_scale, y_scale; /* Compute extents.x/y/width/height from recording_surface, * in font space. */ status = _cairo_recording_surface_get_bbox ((cairo_recording_surface_t *) recording_s &bbox, &extent_scale); if (unlikely (status)) return status; _cairo_box_to_doubles (&bbox, &x1, &y1, &x2, &y2); x_scale = extent_x_scale; y_scale = extent_y_scale; extents->x_bearing = x1 * x_scale; extents->y_bearing = y1 * y_scale; extents->width = (x2 - x1) * x_scale; extents->height = (y2 - y1) * y_scale; } if (scaled_font->base.options.hint_metrics != CAIRO_HINT_METRICS_OFF) { extents->x_advance = _cairo_lround (extents->x_advance / snap_x_scale) * snap_x_scale; extents->y_advance = _cairo_lround (extents->y_advance / snap_y_scale) * snap_y_scale; } return status; #else return CAIRO_INT_STATUS_UNSUPPORTED; #endif } static cairo_int_status_t _cairo_ft_scaled_glyph_init_surface_for_recording_surface (cairo_ft_scaled_font_t cairo_scaled_glyph_t *scaled_glyph, const cairo_color_t *foreground_color) { cairo_surface_t *surface; int width, height; cairo_int_status_t status = CAIRO_STATUS_SUCCESS; cairo_bool_t foreground_used; width = _cairo_fixed_integer_ceil (scaled_glyph->bbox.p2.x) - _cairo_fixed_integer_floor (scaled_glyph->bbox.p1.x); height = _cairo_fixed_integer_ceil (scaled_glyph->bbox.p2.y) - _cairo_fixed_integer_floor (scaled_glyph->bbox.p1.y); surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height); cairo_surface_set_device_offset (surface, - _cairo_fixed_integer_floor (scaled_glyph->bbox.p1.x), - _cairo_fixed_integer_floor (scaled_glyph->bbox.p1.y)); status = _cairo_recording_surface_replay_with_foreground_color (scaled_glyph->record surface, foreground_color, &foreground_used); if (unlikely (status)) { cairo_surface_destroy(surface); return status; } _cairo_scaled_glyph_set_color_surface (scaled_glyph, &scaled_font->base, (cairo_image_surface_t *)surface, foreground_used ? foreground_color : NULL); surface = NULL; if (surface) cairo_surface_destroy (surface); return status; } static void _cairo_ft_scaled_glyph_get_metrics (cairo_ft_scaled_font_t *scaled_font, FT_Face face, cairo_bool_t vertical_layout, int load_flags, cairo_text_extents_t *fs_metrics) { FT_Glyph_Metrics *metrics; double x_factor, y_factor; cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled; cairo_bool_t hint_metrics = scaled_font->base.options.hint_metrics != CAIRO_HINT_METRI FT_GlyphSlot glyph = face->glyph; /* * Compute font-space metrics */ metrics = &glyph->metrics; if (unscaled->x_scale == 0) x_factor = 0; else x_factor = 1 / unscaled->x_scale; if (unscaled->y_scale == 0) y_factor = 0; else y_factor = 1 / unscaled->y_scale; /* * Note: Y coordinates of the horizontal bearing need to be negated. * * Scale metrics back to glyph space from the scaled glyph space returned * by FreeType * * If we want hinted metrics but aren't asking for hinted glyphs from * FreeType, then we need to do the metric hinting ourselves. */ if (hint_metrics && (load_flags & FT_LOAD_NO_HINTING)) { FT_Pos x1, x2; FT_Pos y1, y2; FT_Pos advance; if (!vertical_layout) { x1 = (metrics->horiBearingX) & -64; x2 = (metrics->horiBearingX + metrics->width + 63) & -64; y1 = (-metrics->horiBearingY) & -64; y2 = (-metrics->horiBearingY + metrics->height + 63) & -64; advance = ((metrics->horiAdvance + 32) & -64); fs_metrics->x_bearing = DOUBLE_FROM_26_6 (x1) * x_factor; fs_metrics->y_bearing = DOUBLE_FROM_26_6 (y1) * y_factor; fs_metrics->width = DOUBLE_FROM_26_6 (x2 - x1) * x_factor; fs_metrics->height = DOUBLE_FROM_26_6 (y2 - y1) * y_factor; fs_metrics->x_advance = DOUBLE_FROM_26_6 (advance) * x_factor; fs_metrics->y_advance = 0; } else { x1 = (metrics->vertBearingX) & -64; x2 = (metrics->vertBearingX + metrics->width + 63) & -64; y1 = (metrics->vertBearingY) & -64; y2 = (metrics->vertBearingY + metrics->height + 63) & -64; advance = ((metrics->vertAdvance + 32) & -64); fs_metrics->x_bearing = DOUBLE_FROM_26_6 (x1) * x_factor; fs_metrics->y_bearing = DOUBLE_FROM_26_6 (y1) * y_factor; fs_metrics->width = DOUBLE_FROM_26_6 (x2 - x1) * x_factor; fs_metrics->height = DOUBLE_FROM_26_6 (y2 - y1) * y_factor; fs_metrics->x_advance = 0; fs_metrics->y_advance = DOUBLE_FROM_26_6 (advance) * y_factor; } } else { fs_metrics->width = DOUBLE_FROM_26_6 (metrics->width) * x_factor; fs_metrics->height = DOUBLE_FROM_26_6 (metrics->height) * y_factor; if (!vertical_layout) { fs_metrics->x_bearing = DOUBLE_FROM_26_6 (metrics->horiBearingX) * x_factor; fs_metrics->y_bearing = DOUBLE_FROM_26_6 (-metrics->horiBearingY) * y_factor; if (hint_metrics || glyph->format != FT_GLYPH_FORMAT_OUTLINE) fs_metrics->x_advance = DOUBLE_FROM_26_6 (metrics->horiAdvance) * x_factor; else fs_metrics->x_advance = DOUBLE_FROM_16_16 (glyph->linearHoriAdvance) * x_factor; fs_metrics->y_advance = 0 * y_factor; } else { fs_metrics->x_bearing = DOUBLE_FROM_26_6 (metrics->vertBearingX) * x_factor; fs_metrics->y_bearing = DOUBLE_FROM_26_6 (metrics->vertBearingY) * y_factor; fs_metrics->x_advance = 0 * x_factor; if (hint_metrics || glyph->format != FT_GLYPH_FORMAT_OUTLINE) fs_metrics->y_advance = DOUBLE_FROM_26_6 (metrics->vertAdvance) * y_factor; else fs_metrics->y_advance = DOUBLE_FROM_16_16 (glyph->linearVertAdvance) * y_factor; } } } static cairo_bool_t _cairo_ft_scaled_glyph_is_colr_v0 (cairo_ft_scaled_font_t *scaled_font, cairo_scaled_glyph_t *scaled_glyph, FT_Face face) { #ifdef HAVE_FT_PALETTE_SELECT FT_LayerIterator iterator; FT_UInt layer_glyph_index; FT_UInt layer_color_index; iterator.p = NULL; if (FT_Get_Color_Glyph_Layer(face, _cairo_scaled_glyph_index (scaled_glyph), &layer_glyph_index, &layer_color_index, &iterator) == 1) { return TRUE; } #endif return FALSE; } static cairo_bool_t _cairo_ft_scaled_glyph_is_colr_v1 (cairo_ft_scaled_font_t *scaled_font, cairo_scaled_glyph_t *scaled_glyph, FT_Face face) { #if HAVE_FT_COLR_V1 FT_OpaquePaint paint = { NULL, 0 }; if (FT_Get_Color_Glyph_Paint (face, _cairo_scaled_glyph_index (scaled_glyph), FT_COLOR_INCLUDE_ROOT_TRANSFORM, &paint) == 1) { return TRUE; } #endif return FALSE; } static const int ft_glyph_private_key; static cairo_int_status_t _cairo_ft_scaled_glyph_init_metrics (cairo_ft_scaled_font_t *scaled_font, cairo_scaled_glyph_t *scaled_glyph, FT_Face face, cairo_bool_t vertical_layout, int load_flags, const cairo_color_t *foreground_color) { cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS; cairo_text_extents_t fs_metrics; cairo_ft_glyph_private_t *glyph_priv; cairo_bool_t hint_metrics = scaled_font->base.options.hint_metrics != CAIRO_HINT_METRI /* _cairo_ft_scaled_glyph_init_metrics() is called once the first * time a cairo_scaled_glyph_t is created. We first allocate the * cairo_ft_glyph_private_t struct and determine the glyph type. */ glyph_priv = _cairo_malloc (sizeof (*glyph_priv)); if (unlikely (glyph_priv == NULL)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_scaled_glyph_attach_private (scaled_glyph, &glyph_priv->base, &ft_glyph_private_key, _cairo_ft_glyph_fini); /* We need to load color to determine if this is a color format. */ int color_flag = 0; #ifdef FT_LOAD_COLOR if (scaled_font->unscaled->have_color && scaled_font->base.options.color_mode != CAIRO_COL color_flag = FT_LOAD_COLOR; #endif /* Ensure use_em_size = FALSE as the format (bitmap or outline) * may change with the size. */ status = _cairo_ft_scaled_glyph_load_glyph (scaled_font, scaled_glyph, face, load_flags | color_flag, FALSE, vertical_layout); if (unlikely (status)) return status; cairo_bool_t is_svg_format = FALSE; #if HAVE_FT_SVG_DOCUMENT if (face->glyph->format == FT_GLYPH_FORMAT_SVG) is_svg_format = TRUE; #endif if (is_svg_format) { glyph_priv->format = CAIRO_FT_GLYPH_TYPE_SVG; } else if (face->glyph->format == FT_GLYPH_FORMAT_OUTLINE) { glyph_priv->format = CAIRO_FT_GLYPH_TYPE_OUTLINE; if (color_flag) { if (_cairo_ft_scaled_glyph_is_colr_v1 (scaled_font, scaled_glyph, face)) glyph_priv->format = CAIRO_FT_GLYPH_TYPE_COLR_V1; else if (_cairo_ft_scaled_glyph_is_colr_v0 (scaled_font, scaled_glyph, face)) glyph_priv->format = CAIRO_FT_GLYPH_TYPE_COLR_V0; } } else { /* For anything else we let FreeType render a bitmap. */ glyph_priv->format = CAIRO_FT_GLYPH_TYPE_BITMAP; } /* If hinting is off, load the glyph with font size set the the em size. */ if (!hint_metrics) { status = _cairo_ft_scaled_glyph_load_glyph (scaled_font, scaled_glyph, face, load_flags | color_flag, TRUE, vertical_layout); if (unlikely (status)) return status; } _cairo_ft_scaled_glyph_get_metrics (scaled_font, face, vertical_layout, load_flags, &fs_metrics); /* SVG and COLRv1 glyphs require the bounding box to be obtained * from the ink extents of the rendering. We need to render glyph * to a recording surface to obtain these extents. But we also * need the advance from _cairo_ft_scaled_glyph_get_metrics() * before calling this function. */ if (glyph_priv->format == CAIRO_FT_GLYPH_TYPE_SVG) { status = (cairo_int_status_t)_cairo_ft_scaled_glyph_init_record_svg_glyph (scaled_f scaled_glyph, face, foreground_color, &fs_metrics); if (unlikely (status)) return status; } if (glyph_priv->format == CAIRO_FT_GLYPH_TYPE_COLR_V1) { /* Restore font size if previously loaded at em_size. */ if (!hint_metrics) { status = _cairo_ft_scaled_glyph_load_glyph (scaled_font, scaled_glyph, face, load_flags | color_flag, FALSE, vertical_layout); if (unlikely (status)) return status; } status = (cairo_int_status_t)_cairo_ft_scaled_glyph_init_record_colr_v1_glyph (scal scaled_glyph, face, foreground_color, &fs_metrics); if (unlikely (status)) return status; } _cairo_scaled_glyph_set_metrics (scaled_glyph, &scaled_font->base, &fs_metrics); return status; } static cairo_int_status_t _cairo_ft_scaled_glyph_init (void *abstract_font, cairo_scaled_glyph_t *scaled_glyph, cairo_scaled_glyph_info_t info, const cairo_color_t *foreground_color) { cairo_ft_scaled_font_t *scaled_font = abstract_font; cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled; FT_Face face; int load_flags = scaled_font->ft_options.load_flags; cairo_bool_t vertical_layout = FALSE; cairo_status_t status = CAIRO_STATUS_SUCCESS; cairo_ft_glyph_private_t *glyph_priv; int color_flag = 0; #ifdef FT_LOAD_COLOR color_flag = FT_LOAD_COLOR; #endif face = _cairo_ft_unscaled_font_lock_face (unscaled); if (!face) return _cairo_error (CAIRO_STATUS_NO_MEMORY); /* Ignore global advance unconditionally */ load_flags |= FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH; if ((info & CAIRO_SCALED_GLYPH_INFO_PATH) != 0 && (info & (CAIRO_SCALED_GLYPH_INFO_SURFACE | CAIRO_SCALED_GLYPH_INFO_COLOR_SURFACE)) == 0) { load_flags |= FT_LOAD_NO_BITMAP; } /* * Don't pass FT_LOAD_VERTICAL_LAYOUT to FT_Load_Glyph here as * suggested by freetype people. */ if (load_flags & FT_LOAD_VERTICAL_LAYOUT) { load_flags &= ~FT_LOAD_VERTICAL_LAYOUT; vertical_layout = TRUE; } /* Metrics will always be requested when a scaled glyph is created */ if (info & CAIRO_SCALED_GLYPH_INFO_METRICS) { status = _cairo_ft_scaled_glyph_init_metrics (scaled_font, scaled_glyph, face, vertical_layout, load_flags, foreground_color); if (unlikely (status)) goto FAIL; } glyph_priv = (cairo_ft_glyph_private_t *) _cairo_scaled_glyph_find_private (scaled_gl &ft_glyph_private_key); assert (glyph_priv != NULL); if (info & CAIRO_SCALED_GLYPH_INFO_RECORDING_SURFACE) { status = CAIRO_INT_STATUS_UNSUPPORTED; if (glyph_priv->format == CAIRO_FT_GLYPH_TYPE_SVG || glyph_priv->format == CAIRO_FT_GLYPH_TYPE_COLR_V0 || glyph_priv->format == CAIRO_FT_GLYPH_TYPE_COLR_V1) { status = _cairo_ft_scaled_glyph_load_glyph (scaled_font, scaled_glyph, face, load_flags | color_flag, FALSE, vertical_layout); if (unlikely (status)) goto FAIL; if (glyph_priv->format == CAIRO_FT_GLYPH_TYPE_SVG) { status = _cairo_ft_scaled_glyph_init_record_svg_glyph (scaled_font, scaled_glyph, face, foreground_color, &scaled_glyph->fs_metrics); } else if (glyph_priv->format == CAIRO_FT_GLYPH_TYPE_COLR_V1) { status = _cairo_ft_scaled_glyph_init_record_colr_v1_glyph (scaled_font, scaled_glyph, face, foreground_color, &scaled_glyph->fs_metrics); } else if (glyph_priv->format == CAIRO_FT_GLYPH_TYPE_COLR_V0) { status = _cairo_ft_scaled_glyph_init_record_colr_v0_glyph (scaled_font, scaled_glyph, face, vertical_layout, load_flags); } } if (status) goto FAIL; } if ((info & CAIRO_SCALED_GLYPH_INFO_COLOR_SURFACE) && scaled_font->base.options.colo if (glyph_priv->format == CAIRO_FT_GLYPH_TYPE_SVG || glyph_priv->format == CAIRO_FT_GLYPH_TYPE_COLR_V1) { status = _cairo_ft_scaled_glyph_init_surface_for_recording_surface (scaled_font, scaled_glyph, foreground_color); } else { status = _cairo_ft_scaled_glyph_init_surface (scaled_font, scaled_glyph, glyph_priv, CAIRO_SCALED_GLYPH_INFO_COLOR_SURFACE, face, foreground_color, vertical_layout, load_flags); } if (unlikely (status)) goto FAIL; } if (info & CAIRO_SCALED_GLYPH_INFO_SURFACE) { status = _cairo_ft_scaled_glyph_init_surface (scaled_font, scaled_glyph, glyph_priv, CAIRO_SCALED_GLYPH_INFO_SURFACE, face, NULL, /* foreground color */ vertical_layout, load_flags); if (unlikely (status)) goto FAIL; } if (info & CAIRO_SCALED_GLYPH_INFO_PATH) { cairo_path_fixed_t *path = NULL; /* hide compiler warning */ /* Load non-color glyph */ status = _cairo_ft_scaled_glyph_load_glyph (scaled_font, scaled_glyph, face, load_flags, FALSE, vertical_layout); if (unlikely (status)) goto FAIL; if (face->glyph->format == FT_GLYPH_FORMAT_OUTLINE) status = _cairo_ft_face_decompose_glyph_outline (face, &path); else status = CAIRO_INT_STATUS_UNSUPPORTED; if (unlikely (status)) goto FAIL; _cairo_scaled_glyph_set_path (scaled_glyph, &scaled_font->base, path); } FAIL: _cairo_ft_unscaled_font_unlock_face (unscaled); return status; } static unsigned long _cairo_ft_ucs4_to_index (void *abstract_font, uint32_t ucs4) { cairo_ft_scaled_font_t *scaled_font = abstract_font; cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled; FT_Face face; FT_UInt index; face = _cairo_ft_unscaled_font_lock_face (unscaled); if (!face) return 0; #if CAIRO_HAS_FC_FONT index = FcFreeTypeCharIndex (face, ucs4); #else index = FT_Get_Char_Index (face, ucs4); #endif _cairo_ft_unscaled_font_unlock_face (unscaled); return index; } static cairo_int_status_t _cairo_ft_load_truetype_table (void *abstract_font, unsigned long tag, long offset, unsigned char *buffer, unsigned long *length) { cairo_ft_scaled_font_t *scaled_font = abstract_font; cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled; FT_Face face; cairo_status_t status = CAIRO_INT_STATUS_UNSUPPORTED; /* We don't support the FreeType feature of loading a table * without specifying the size since this may overflow our * buffer. */ assert (length != NULL); if (_cairo_ft_scaled_font_is_vertical (&scaled_font->base)) return CAIRO_INT_STATUS_UNSUPPORTED; #if HAVE_FT_LOAD_SFNT_TABLE face = _cairo_ft_unscaled_font_lock_face (unscaled); if (!face) return _cairo_error (CAIRO_STATUS_NO_MEMORY); if (FT_IS_SFNT (face)) { if (buffer == NULL) *length = 0; if (FT_Load_Sfnt_Table (face, tag, offset, buffer, length) == 0) status = CAIRO_STATUS_SUCCESS; } _cairo_ft_unscaled_font_unlock_face (unscaled); #endif return status; } static cairo_int_status_t _cairo_ft_index_to_ucs4(void *abstract_font, unsigned long index, uint32_t *ucs4) { cairo_ft_scaled_font_t *scaled_font = abstract_font; cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled; FT_Face face; FT_ULong charcode; FT_UInt gindex; face = _cairo_ft_unscaled_font_lock_face (unscaled); if (!face) return _cairo_error (CAIRO_STATUS_NO_MEMORY); *ucs4 = (uint32_t) -1; charcode = FT_Get_First_Char(face, &gindex); while (gindex != 0) { if (gindex == index) { *ucs4 = charcode; break; } charcode = FT_Get_Next_Char (face, charcode, &gindex); } _cairo_ft_unscaled_font_unlock_face (unscaled); return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_ft_is_synthetic (void *abstract_font, cairo_bool_t *is_synthetic) { cairo_int_status_t status = CAIRO_STATUS_SUCCESS; cairo_ft_scaled_font_t *scaled_font = abstract_font; cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled; FT_Face face; FT_Error error; static GetVarFunc getVar; static DoneVarFunc doneVar; static GetVarBlendCoordsFunc getVarBlendCoords; static int firstTime = 1; if (firstTime) { getVar = (GetVarFunc) dlsym (RTLD_DEFAULT, "FT_Get_MM_Var"); doneVar = (DoneVarFunc) dlsym (RTLD_DEFAULT, "FT_Done_MM_Var"); getVarBlendCoords = (GetVarBlendCoordsFunc) dlsym (RTLD_DEFAULT, "FT_Get_Var_Blend_Co firstTime = 0; } if (scaled_font->ft_options.synth_flags != 0) { *is_synthetic = TRUE; return status; } *is_synthetic = FALSE; face = _cairo_ft_unscaled_font_lock_face (unscaled); if (!face) return _cairo_error (CAIRO_STATUS_NO_MEMORY); if (face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS) { FT_MM_Var *mm_var = NULL; FT_Fixed *coords = NULL; int num_axis; /* If this is an MM or variable font we can't assume the current outlines * are the same as the font tables */ *is_synthetic = TRUE; error = getVar ? (*getVar) (face, &mm_var) : -1; if (error) { status = _cairo_error (_cairo_ft_to_cairo_error (error)); goto cleanup; } num_axis = mm_var->num_axis; coords = _cairo_malloc_ab (num_axis, sizeof(FT_Fixed)); if (!coords) { status = _cairo_error (CAIRO_STATUS_NO_MEMORY); goto cleanup; } /* If FT_Get_Var_Blend_Coordinates() is available, we can check if the * current design coordinates are the default coordinates. In this case * the current outlines match the font tables. */ if (getVarBlendCoords) { int i; (*getVarBlendCoords) (face, num_axis, coords); *is_synthetic = FALSE; for (i = 0; i < num_axis; i++) { if (coords[i]) { *is_synthetic = TRUE; break; } } } cleanup: free (coords); if (doneVar) (*doneVar) (face->glyph->library, mm_var); else free (mm_var); } _cairo_ft_unscaled_font_unlock_face (unscaled); return status; } static cairo_int_status_t _cairo_index_to_glyph_name (void *abstract_font, char **glyph_names, int num_glyph_names, unsigned long glyph_index, unsigned long *glyph_array_index) { cairo_ft_scaled_font_t *scaled_font = abstract_font; cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled; FT_Face face; char buffer[256]; /* PLRM specifies max name length of 127 */ FT_Error error; int i; face = _cairo_ft_unscaled_font_lock_face (unscaled); if (!face) return _cairo_error (CAIRO_STATUS_NO_MEMORY); error = FT_Get_Glyph_Name (face, glyph_index, buffer, sizeof buffer); _cairo_ft_unscaled_font_unlock_face (unscaled); if (error != FT_Err_Ok) { /* propagate fatal errors from FreeType */ if (error == FT_Err_Out_Of_Memory) return _cairo_error (CAIRO_STATUS_NO_MEMORY); return CAIRO_INT_STATUS_UNSUPPORTED; } /* FT first numbers the glyphs in the order they are read from the * Type 1 font. Then if .notdef is not the first glyph, the first * glyph is swapped with .notdef to ensure that .notdef is at * glyph index 0. * * As all but two glyphs in glyph_names already have the same * index as the FT glyph index, we first check if * glyph_names[glyph_index] is the name we are looking for. If not * we fall back to searching the entire array. */ if ((long)glyph_index < num_glyph_names && strcmp (glyph_names[glyph_index], buffer) == 0) { *glyph_array_index = glyph_index; return CAIRO_STATUS_SUCCESS; } for (i = 0; i < num_glyph_names; i++) { if (strcmp (glyph_names[i], buffer) == 0) { *glyph_array_index = i; return CAIRO_STATUS_SUCCESS; } } return CAIRO_INT_STATUS_UNSUPPORTED; } static cairo_bool_t _ft_is_type1 (FT_Face face) { #if HAVE_FT_GET_X11_FONT_FORMAT const char *font_format = FT_Get_X11_Font_Format (face); if (font_format && (strcmp (font_format, "Type 1") == 0 || strcmp (font_format, "CFF") == 0)) { return TRUE; } #endif return FALSE; } static cairo_int_status_t _cairo_ft_load_type1_data (void *abstract_font, long offset, unsigned char *buffer, unsigned long *length) { cairo_ft_scaled_font_t *scaled_font = abstract_font; cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled; FT_Face face; cairo_status_t status = CAIRO_STATUS_SUCCESS; unsigned long available_length; unsigned long ret; assert (length != NULL); if (_cairo_ft_scaled_font_is_vertical (&scaled_font->base)) return CAIRO_INT_STATUS_UNSUPPORTED; face = _cairo_ft_unscaled_font_lock_face (unscaled); if (!face) return _cairo_error (CAIRO_STATUS_NO_MEMORY); #if HAVE_FT_LOAD_SFNT_TABLE if (FT_IS_SFNT (face)) { status = CAIRO_INT_STATUS_UNSUPPORTED; goto unlock; } #endif if (! _ft_is_type1 (face)) { status = CAIRO_INT_STATUS_UNSUPPORTED; goto unlock; } available_length = MAX (face->stream->size - offset, 0); if (!buffer) { *length = available_length; } else { if (*length > available_length) { status = CAIRO_INT_STATUS_UNSUPPORTED; } else if (face->stream->read != NULL) { /* Note that read() may be implemented as a macro, thanks POSIX!, so we * need to wrap the following usage in parentheses in order to * disambiguate it for the pre-processor - using the verbose function * pointer dereference for clarity. */ ret = (* face->stream->read) (face->stream, offset, buffer, *length); if (ret != *length) status = _cairo_error (CAIRO_STATUS_READ_ERROR); } else { memcpy (buffer, face->stream->base + offset, *length); } } unlock: _cairo_ft_unscaled_font_unlock_face (unscaled); return status; } static cairo_bool_t _cairo_ft_has_color_glyphs (void *scaled) { cairo_ft_unscaled_font_t *unscaled = ((cairo_ft_scaled_font_t *)scaled)->unscaled; if (!unscaled->have_color_set) { FT_Face face; face = _cairo_ft_unscaled_font_lock_face (unscaled); if (unlikely (face == NULL)) return FALSE; _cairo_ft_unscaled_font_unlock_face (unscaled); } return unscaled->have_color; } static const cairo_scaled_font_backend_t _cairo_ft_scaled_font_backend = { CAIRO_FONT_TYPE_FT, _cairo_ft_scaled_font_fini, _cairo_ft_scaled_glyph_init, NULL, /* text_to_glyphs */ _cairo_ft_ucs4_to_index, _cairo_ft_load_truetype_table, _cairo_ft_index_to_ucs4, _cairo_ft_is_synthetic, _cairo_index_to_glyph_name, _cairo_ft_load_type1_data, _cairo_ft_has_color_glyphs }; /* #cairo_ft_font_face_t */ #if CAIRO_HAS_FC_FONT static cairo_font_face_t * _cairo_ft_font_face_create_for_pattern (FcPattern *pattern); static cairo_status_t _cairo_ft_font_face_create_for_toy (cairo_toy_font_face_t *toy_face, cairo_font_face_t **font_face_out) { cairo_font_face_t *font_face = (cairo_font_face_t *) &_cairo_font_face_nil; FcPattern *pattern; int fcslant; int fcweight; pattern = FcPatternCreate (); if (!pattern) { _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); return font_face->status; } if (!FcPatternAddString (pattern, FC_FAMILY, (unsigned char *) toy_face->family)) { _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); goto FREE_PATTERN; } switch (toy_face->slant) { case CAIRO_FONT_SLANT_ITALIC: fcslant = FC_SLANT_ITALIC; break; case CAIRO_FONT_SLANT_OBLIQUE: fcslant = FC_SLANT_OBLIQUE; break; case CAIRO_FONT_SLANT_NORMAL: default: fcslant = FC_SLANT_ROMAN; break; } if (!FcPatternAddInteger (pattern, FC_SLANT, fcslant)) { _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); goto FREE_PATTERN; } switch (toy_face->weight) { case CAIRO_FONT_WEIGHT_BOLD: fcweight = FC_WEIGHT_BOLD; break; case CAIRO_FONT_WEIGHT_NORMAL: default: fcweight = FC_WEIGHT_MEDIUM; break; } if (!FcPatternAddInteger (pattern, FC_WEIGHT, fcweight)) { _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); goto FREE_PATTERN; } font_face = _cairo_ft_font_face_create_for_pattern (pattern); FREE_PATTERN: FcPatternDestroy (pattern); *font_face_out = font_face; return font_face->status; } #endif static cairo_bool_t _cairo_ft_font_face_destroy (void *abstract_face) { cairo_ft_font_face_t *font_face = abstract_face; /* When destroying a face created by cairo_ft_font_face_create_for_ft_face, * we have a special "zombie" state for the face when the unscaled font * is still alive but there are no other references to a font face with * the same FT_Face. * * We go from: * * font_face ------> unscaled * <-....weak....../ * * To: * * font_face <------- unscaled */ if (font_face->unscaled) { CAIRO_FT_LOCK (font_face->unscaled); if (font_face->unscaled->from_face && font_face->next == NULL && font_face->unscaled->faces == font_face && CAIRO_REFERENCE_COUNT_GET_VALUE (&font_face->unscaled->base.ref_count) > 1) { CAIRO_FT_UNLOCK (font_face->unscaled); _cairo_unscaled_font_destroy (&font_face->unscaled->base); font_face->unscaled = NULL; return FALSE; } cairo_ft_font_face_t *tmp_face = NULL; cairo_ft_font_face_t *last_face = NULL; /* Remove face from linked list */ for (tmp_face = font_face->unscaled->faces; tmp_face; tmp_face = tmp_face->next) { if (tmp_face == font_face) { if (last_face) last_face->next = tmp_face->next; else font_face->unscaled->faces = tmp_face->next; } last_face = tmp_face; } CAIRO_FT_UNLOCK (font_face->unscaled); _cairo_unscaled_font_destroy (&font_face->unscaled->base); font_face->unscaled = NULL; } _cairo_ft_options_fini (&font_face->ft_options); #if CAIRO_HAS_FC_FONT if (font_face->pattern) { FcPatternDestroy (font_face->pattern); cairo_font_face_destroy (font_face->resolved_font_face); } #endif return TRUE; } static cairo_font_face_t * _cairo_ft_font_face_get_implementation (void *abstract_face, const cairo_matrix_t *font_matrix, const cairo_matrix_t *ctm, const cairo_font_options_t *options) { /* The handling of font options is different depending on how the * font face was created. When the user creates a font face with * cairo_ft_font_face_create_for_ft_face(), then the load flags * passed in augment the load flags for the options. But for * cairo_ft_font_face_create_for_pattern(), the load flags are * derived from a pattern where the user has called * cairo_ft_font_options_substitute(), so *just* use those load * flags and ignore the options. */ #if CAIRO_HAS_FC_FONT cairo_ft_font_face_t *font_face = abstract_face; /* If we have an unresolved pattern, resolve it and create * unscaled font. Otherwise, use the ones stored in font_face. */ if (font_face->pattern) { cairo_font_face_t *resolved; /* Cache the resolved font whilst the FcConfig remains consistent. */ resolved = font_face->resolved_font_face; if (resolved != NULL) { if (! FcInitBringUptoDate ()) { _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); return (cairo_font_face_t *) &_cairo_font_face_nil; } if (font_face->resolved_config == FcConfigGetCurrent ()) return cairo_font_face_reference (resolved); cairo_font_face_destroy (resolved); font_face->resolved_font_face = NULL; } resolved = _cairo_ft_resolve_pattern (font_face->pattern, font_matrix, ctm, options); if (unlikely (resolved->status)) return resolved; font_face->resolved_font_face = cairo_font_face_reference (resolved); font_face->resolved_config = FcConfigGetCurrent (); return resolved; } #endif return abstract_face; } static void _cairo_ft_font_face_lock (void *abstract_face) { cairo_ft_font_face_t *font_face = abstract_face; if (font_face->unscaled) { CAIRO_FT_LOCK (font_face->unscaled); } } static void _cairo_ft_font_face_unlock (void *abstract_face) { cairo_ft_font_face_t *font_face = abstract_face; if (font_face->unscaled) { CAIRO_FT_UNLOCK (font_face->unscaled); } } const cairo_font_face_backend_t _cairo_ft_font_face_backend = { CAIRO_FONT_TYPE_FT, #if CAIRO_HAS_FC_FONT _cairo_ft_font_face_create_for_toy, #else NULL, #endif _cairo_ft_font_face_destroy, _cairo_ft_font_face_scaled_font_create, _cairo_ft_font_face_get_implementation, /* _cairo_ft_font_face_lock, _cairo_ft_font_face_unlock */ }; #if CAIRO_HAS_FC_FONT static cairo_font_face_t * _cairo_ft_font_face_create_for_pattern (FcPattern *pattern) { cairo_ft_font_face_t *font_face; font_face = _cairo_malloc (sizeof (cairo_ft_font_face_t)); if (unlikely (font_face == NULL)) { _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); return (cairo_font_face_t *) &_cairo_font_face_nil; } font_face->unscaled = NULL; _get_pattern_ft_options (pattern, &font_face->ft_options); font_face->next = NULL; font_face->pattern = FcPatternDuplicate (pattern); if (unlikely (font_face->pattern == NULL)) { free (font_face); _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); return (cairo_font_face_t *) &_cairo_font_face_nil; } font_face->resolved_font_face = NULL; font_face->resolved_config = NULL; _cairo_font_face_init (&font_face->base, &_cairo_ft_font_face_backend); return &font_face->base; } #endif static cairo_font_face_t * _cairo_ft_font_face_create (cairo_ft_unscaled_font_t *unscaled, cairo_ft_options_t *ft_options) { cairo_ft_font_face_t *font_face, **prev_font_face; CAIRO_FT_LOCK (unscaled); /* Looked for an existing matching font face */ for (font_face = unscaled->faces, prev_font_face = &unscaled->faces; font_face; prev_font_face = &font_face->next, font_face = font_face->next) { if (font_face->ft_options.load_flags == ft_options->load_flags && font_face->ft_options.synth_flags == ft_options->synth_flags && cairo_font_options_equal (&font_face->ft_options.base, &ft_options->base)) { if (font_face->base.status) { /* The font_face has been left in an error state, abandon it. */ *prev_font_face = font_face->next; break; } if (font_face->unscaled == NULL) { /* Resurrect this "zombie" font_face (from * _cairo_ft_font_face_destroy), switching its unscaled_font * from owner to ownee. */ font_face->unscaled = unscaled; _cairo_unscaled_font_reference (&unscaled->base); } else { cairo_font_face_reference (&font_face->base); } CAIRO_FT_UNLOCK (unscaled); return &font_face->base; } } /* No match found, create a new one */ font_face = _cairo_malloc (sizeof (cairo_ft_font_face_t)); if (unlikely (!font_face)) { CAIRO_FT_UNLOCK (unscaled); _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); return (cairo_font_face_t *)&_cairo_font_face_nil; } font_face->unscaled = unscaled; _cairo_unscaled_font_reference (&unscaled->base); _cairo_ft_options_init_copy (&font_face->ft_options, ft_options); if (unscaled->faces && unscaled->faces->unscaled == NULL) { /* This "zombie" font_face (from _cairo_ft_font_face_destroy) * is no longer needed. */ assert (unscaled->from_face && unscaled->faces->next == NULL); cairo_font_face_destroy (&unscaled->faces->base); unscaled->faces = NULL; } font_face->next = unscaled->faces; unscaled->faces = font_face; #if CAIRO_HAS_FC_FONT font_face->pattern = NULL; #endif _cairo_font_face_init (&font_face->base, &_cairo_ft_font_face_backend); CAIRO_FT_UNLOCK (unscaled); return &font_face->base; } /* implement the platform-specific interface */ #if CAIRO_HAS_FC_FONT static cairo_status_t _cairo_ft_font_options_substitute (const cairo_font_options_t *options, FcPattern *pattern) { FcValue v; if (options->antialias != CAIRO_ANTIALIAS_DEFAULT) { if (FcPatternGet (pattern, FC_ANTIALIAS, 0, &v) == FcResultNoMatch) { if (! FcPatternAddBool (pattern, FC_ANTIALIAS, options->antialias != CAIRO_ANTIALIAS_NONE)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); if (options->antialias != CAIRO_ANTIALIAS_SUBPIXEL) { FcPatternDel (pattern, FC_RGBA); if (! FcPatternAddInteger (pattern, FC_RGBA, FC_RGBA_NONE)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); } } } if (options->antialias != CAIRO_ANTIALIAS_DEFAULT) { if (FcPatternGet (pattern, FC_RGBA, 0, &v) == FcResultNoMatch) { int rgba; if (options->antialias == CAIRO_ANTIALIAS_SUBPIXEL) { switch (options->subpixel_order) { case CAIRO_SUBPIXEL_ORDER_DEFAULT: case CAIRO_SUBPIXEL_ORDER_RGB: default: rgba = FC_RGBA_RGB; break; case CAIRO_SUBPIXEL_ORDER_BGR: rgba = FC_RGBA_BGR; break; case CAIRO_SUBPIXEL_ORDER_VRGB: rgba = FC_RGBA_VRGB; break; case CAIRO_SUBPIXEL_ORDER_VBGR: rgba = FC_RGBA_VBGR; break; } } else { rgba = FC_RGBA_NONE; } if (! FcPatternAddInteger (pattern, FC_RGBA, rgba)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); } } if (options->lcd_filter != CAIRO_LCD_FILTER_DEFAULT) { if (FcPatternGet (pattern, FC_LCD_FILTER, 0, &v) == FcResultNoMatch) { int lcd_filter; switch (options->lcd_filter) { case CAIRO_LCD_FILTER_NONE: lcd_filter = FT_LCD_FILTER_NONE; break; case CAIRO_LCD_FILTER_INTRA_PIXEL: lcd_filter = FT_LCD_FILTER_LEGACY; break; case CAIRO_LCD_FILTER_FIR3: lcd_filter = FT_LCD_FILTER_LIGHT; break; default: case CAIRO_LCD_FILTER_DEFAULT: case CAIRO_LCD_FILTER_FIR5: lcd_filter = FT_LCD_FILTER_DEFAULT; break; } if (! FcPatternAddInteger (pattern, FC_LCD_FILTER, lcd_filter)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); } } if (options->hint_style != CAIRO_HINT_STYLE_DEFAULT) { if (FcPatternGet (pattern, FC_HINTING, 0, &v) == FcResultNoMatch) { if (! FcPatternAddBool (pattern, FC_HINTING, options->hint_style != CAIRO_HINT_STYLE_NONE)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); } #ifdef FC_HINT_STYLE if (FcPatternGet (pattern, FC_HINT_STYLE, 0, &v) == FcResultNoMatch) { int hint_style; switch (options->hint_style) { case CAIRO_HINT_STYLE_NONE: hint_style = FC_HINT_NONE; break; case CAIRO_HINT_STYLE_SLIGHT: hint_style = FC_HINT_SLIGHT; break; case CAIRO_HINT_STYLE_MEDIUM: hint_style = FC_HINT_MEDIUM; break; case CAIRO_HINT_STYLE_FULL: case CAIRO_HINT_STYLE_DEFAULT: default: hint_style = FC_HINT_FULL; break; } if (! FcPatternAddInteger (pattern, FC_HINT_STYLE, hint_style)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); } #endif } return CAIRO_STATUS_SUCCESS; } /** * cairo_ft_font_options_substitute: * @options: a #cairo_font_options_t object * @pattern: an existing #FcPattern * * Add options to a #FcPattern based on a #cairo_font_options_t font * options object. Options that are already in the pattern, are not overridden, * so you should call this function after calling FcConfigSubstitute() (the * user's settings should override options based on the surface type), but * before calling FcDefaultSubstitute(). * * Since: 1.0 **/ void cairo_ft_font_options_substitute (const cairo_font_options_t *options, FcPattern *pattern) { if (cairo_font_options_status ((cairo_font_options_t *) options)) return; _cairo_ft_font_options_substitute (options, pattern); } static cairo_font_face_t * _cairo_ft_resolve_pattern (FcPattern *pattern, const cairo_matrix_t *font_matrix, const cairo_matrix_t *ctm, const cairo_font_options_t *font_options) { cairo_status_t status; cairo_matrix_t scale; FcPattern *resolved; cairo_ft_font_transform_t sf; FcResult result; cairo_ft_unscaled_font_t *unscaled; cairo_ft_options_t ft_options; cairo_font_face_t *font_face; scale = *ctm; scale.x0 = scale.y0 = 0; cairo_matrix_multiply (&scale, font_matrix, &scale); status = _compute_transform (&sf, &scale, NULL); if (unlikely (status)) return (cairo_font_face_t *)&_cairo_font_face_nil; pattern = FcPatternDuplicate (pattern); if (pattern == NULL) return (cairo_font_face_t *)&_cairo_font_face_nil; if (! FcPatternAddDouble (pattern, FC_PIXEL_SIZE, sf.y_scale)) { font_face = (cairo_font_face_t *)&_cairo_font_face_nil; goto FREE_PATTERN; } if (! FcConfigSubstitute (NULL, pattern, FcMatchPattern)) { font_face = (cairo_font_face_t *)&_cairo_font_face_nil; goto FREE_PATTERN; } status = _cairo_ft_font_options_substitute (font_options, pattern); if (status) { font_face = (cairo_font_face_t *)&_cairo_font_face_nil; goto FREE_PATTERN; } FcDefaultSubstitute (pattern); status = _cairo_ft_unscaled_font_create_for_pattern (pattern, &unscaled); if (unlikely (status)) { font_face = (cairo_font_face_t *)&_cairo_font_face_nil; goto FREE_PATTERN; } if (unscaled == NULL) { resolved = FcFontMatch (NULL, pattern, &result); if (!resolved) { /* We failed to find any font. Substitute twin so that the user can * see something (and hopefully recognise that the font is missing) * and not just receive a NO_MEMORY error during rendering. */ font_face = _cairo_font_face_twin_create_fallback (); goto FREE_PATTERN; } status = _cairo_ft_unscaled_font_create_for_pattern (resolved, &unscaled); if (unlikely (status || unscaled == NULL)) { font_face = (cairo_font_face_t *)&_cairo_font_face_nil; goto FREE_RESOLVED; } } else resolved = pattern; _get_pattern_ft_options (resolved, &ft_options); font_face = _cairo_ft_font_face_create (unscaled, &ft_options); _cairo_ft_options_fini (&ft_options); _cairo_unscaled_font_destroy (&unscaled->base); FREE_RESOLVED: if (resolved != pattern) FcPatternDestroy (resolved); FREE_PATTERN: FcPatternDestroy (pattern); return font_face; } /** * cairo_ft_font_face_create_for_pattern: * @pattern: A fontconfig pattern. Cairo makes a copy of the pattern * if it needs to. You are free to modify or free @pattern after this call. * * Creates a new font face for the FreeType font backend based on a * fontconfig pattern. This font can then be used with * cairo_set_font_face() or cairo_scaled_font_create(). The * #cairo_scaled_font_t returned from cairo_scaled_font_create() is * also for the FreeType backend and can be used with functions such * as cairo_ft_scaled_font_lock_face(). * * Font rendering options are represented both here and when you * call cairo_scaled_font_create(). Font options that have a representation * in a #FcPattern must be passed in here; to modify #FcPattern * appropriately to reflect the options in a #cairo_font_options_t, call * cairo_ft_font_options_substitute(). * * The pattern's FC_FT_FACE element is inspected first and if that is set, * that will be the FreeType font face associated with the returned cairo * font face. Otherwise the FC_FILE element is checked. If it's set, * that and the value of the FC_INDEX element (defaults to zero) of @pattern * are used to load a font face from file. * * If both steps from the previous paragraph fails, @pattern will be passed * to FcConfigSubstitute, FcDefaultSubstitute, and finally FcFontMatch, * and the resulting font pattern is used. * * If the FC_FT_FACE element of @pattern is set, the user is responsible * for making sure that the referenced FT_Face remains valid for the life * time of the returned #cairo_font_face_t. See * cairo_ft_font_face_create_for_ft_face() for an example of how to couple * the life time of the FT_Face to that of the cairo font-face. * * Return value: a newly created #cairo_font_face_t. Free with * cairo_font_face_destroy() when you are done using it. * * Since: 1.0 **/ cairo_font_face_t * cairo_ft_font_face_create_for_pattern (FcPattern *pattern) { cairo_ft_unscaled_font_t *unscaled; cairo_font_face_t *font_face; cairo_ft_options_t ft_options; cairo_status_t status; status = _cairo_ft_unscaled_font_create_for_pattern (pattern, &unscaled); if (unlikely (status)) { if (status == CAIRO_STATUS_FILE_NOT_FOUND) return (cairo_font_face_t *) &_cairo_font_face_nil_file_not_found; else return (cairo_font_face_t *) &_cairo_font_face_nil; } if (unlikely (unscaled == NULL)) { /* Store the pattern. We will resolve it and create unscaled * font when creating scaled fonts */ return _cairo_ft_font_face_create_for_pattern (pattern); } _get_pattern_ft_options (pattern, &ft_options); font_face = _cairo_ft_font_face_create (unscaled, &ft_options); _cairo_ft_options_fini (&ft_options); _cairo_unscaled_font_destroy (&unscaled->base); return font_face; } #endif /** * cairo_ft_font_face_create_for_ft_face: * @face: A FreeType face object, already opened. This must * be kept around until the face's ref_count drops to * zero and it is freed. Since the face may be referenced * internally to Cairo, the best way to determine when it * is safe to free the face is to pass a * #cairo_destroy_func_t to cairo_font_face_set_user_data() * @load_flags: flags to pass to FT_Load_Glyph when loading * glyphs from the font. These flags are OR'ed together with * the flags derived from the #cairo_font_options_t passed * to cairo_scaled_font_create(), so only a few values such * as %FT_LOAD_VERTICAL_LAYOUT, and %FT_LOAD_FORCE_AUTOHINT * are useful. You should not pass any of the flags affecting * the load target, such as %FT_LOAD_TARGET_LIGHT. * * Creates a new font face for the FreeType font backend from a * pre-opened FreeType face. This font can then be used with * cairo_set_font_face() or cairo_scaled_font_create(). The * #cairo_scaled_font_t returned from cairo_scaled_font_create() is * also for the FreeType backend and can be used with functions such * as cairo_ft_scaled_font_lock_face(). Note that Cairo may keep a reference * to the FT_Face alive in a font-cache and the exact lifetime of the reference * depends highly upon the exact usage pattern and is subject to external * factors. You must not call FT_Done_Face() before the last reference to the * #cairo_font_face_t has been dropped. * * As an example, below is how one might correctly couple the lifetime of * the FreeType face object to the #cairo_font_face_t. * * <informalexample><programlisting> * static const cairo_user_data_key_t key; * * font_face = cairo_ft_font_face_create_for_ft_face (ft_face, 0); * status = cairo_font_face_set_user_data (font_face, &key, * ft_face, (cairo_destroy_func_t) FT_Done_Face); * if (status) { * cairo_font_face_destroy (font_face); * FT_Done_Face (ft_face); * return ERROR; * } * </programlisting></informalexample> * * Return value: a newly created #cairo_font_face_t. Free with * cairo_font_face_destroy() when you are done using it. * * Since: 1.0 **/ cairo_font_face_t * cairo_ft_font_face_create_for_ft_face (FT_Face face, int load_flags, unsigned int synth_flags, void *face_context) { cairo_ft_unscaled_font_t *unscaled; cairo_font_face_t *font_face; cairo_ft_options_t ft_options; cairo_status_t status; status = _cairo_ft_unscaled_font_create_from_face (face, face_context, &unscaled); if (unlikely (status)) return (cairo_font_face_t *)&_cairo_font_face_nil; ft_options.load_flags = load_flags; ft_options.synth_flags = synth_flags; _cairo_font_options_init_default (&ft_options.base); font_face = _cairo_ft_font_face_create (unscaled, &ft_options); _cairo_unscaled_font_destroy (&unscaled->base); return font_face; } /** * cairo_ft_font_face_set_synthesize: * @font_face: The #cairo_ft_font_face_t object to modify * @synth_flags: the set of synthesis options to enable * * FreeType provides the ability to synthesize different glyphs from a base * font, which is useful if you lack those glyphs from a true bold or oblique * font. See also #cairo_ft_synthesize_t. * * Since: 1.12 **/ void cairo_ft_font_face_set_synthesize (cairo_font_face_t *font_face, unsigned int synth_flags) { cairo_ft_font_face_t *ft; if (font_face->backend->type != CAIRO_FONT_TYPE_FT) return; ft = (cairo_ft_font_face_t *) font_face; ft->ft_options.synth_flags |= synth_flags; } /** * cairo_ft_font_face_unset_synthesize: * @font_face: The #cairo_ft_font_face_t object to modify * @synth_flags: the set of synthesis options to disable * * See cairo_ft_font_face_set_synthesize(). * * Since: 1.12 **/ void cairo_ft_font_face_unset_synthesize (cairo_font_face_t *font_face, unsigned int synth_flags) { cairo_ft_font_face_t *ft; if (font_face->backend->type != CAIRO_FONT_TYPE_FT) return; ft = (cairo_ft_font_face_t *) font_face; ft->ft_options.synth_flags &= ~synth_flags; } /** * cairo_ft_font_face_get_synthesize: * @font_face: The #cairo_ft_font_face_t object to query * * See #cairo_ft_synthesize_t. * * Returns: the current set of synthesis options. * * Since: 1.12 **/ unsigned int cairo_ft_font_face_get_synthesize (cairo_font_face_t *font_face) { cairo_ft_font_face_t *ft; if (font_face->backend->type != CAIRO_FONT_TYPE_FT) return 0; ft = (cairo_ft_font_face_t *) font_face; return ft->ft_options.synth_flags; } /** * cairo_ft_scaled_font_lock_face: * @scaled_font: A #cairo_scaled_font_t from the FreeType font backend. Such an * object can be created by calling cairo_scaled_font_create() on a * FreeType backend font face (see cairo_ft_font_face_create_for_pattern(), * cairo_ft_font_face_create_for_ft_face()). * * cairo_ft_scaled_font_lock_face() gets the #FT_Face object from a FreeType * backend font and scales it appropriately for the font and applies OpenType * font variations if applicable. You must * release the face with cairo_ft_scaled_font_unlock_face() * when you are done using it. Since the #FT_Face object can be * shared between multiple #cairo_scaled_font_t objects, you must not * lock any other font objects until you unlock this one. A count is * kept of the number of times cairo_ft_scaled_font_lock_face() is * called. cairo_ft_scaled_font_unlock_face() must be called the same number * of times. * * You must be careful when using this function in a library or in a * threaded application, because freetype's design makes it unsafe to * call freetype functions simultaneously from multiple threads, (even * if using distinct FT_Face objects). Because of this, application * code that acquires an FT_Face object with this call must add its * own locking to protect any use of that object, (and which also must * protect any other calls into cairo as almost any cairo function * might result in a call into the freetype library). * * Return value: The #FT_Face object for @font, scaled appropriately, * or %NULL if @scaled_font is in an error state (see * cairo_scaled_font_status()) or there is insufficient memory. * * Since: 1.0 **/ FT_Face cairo_ft_scaled_font_lock_face (cairo_scaled_font_t *abstract_font) { cairo_ft_scaled_font_t *scaled_font = (cairo_ft_scaled_font_t *) abstract_font; FT_Face face; cairo_status_t status; if (! _cairo_scaled_font_is_ft (abstract_font)) { _cairo_error_throw (CAIRO_STATUS_FONT_TYPE_MISMATCH); return NULL; } if (scaled_font->base.status) return NULL; face = _cairo_ft_unscaled_font_lock_face (scaled_font->unscaled); if (unlikely (face == NULL)) { status = _cairo_scaled_font_set_error (&scaled_font->base, CAIRO_STATUS_NO_MEMORY); return NULL; } status = _cairo_ft_unscaled_font_set_scale (scaled_font->unscaled, &scaled_font->base.scale); if (unlikely (status)) { _cairo_ft_unscaled_font_unlock_face (scaled_font->unscaled); status = _cairo_scaled_font_set_error (&scaled_font->base, status); return NULL; } cairo_ft_apply_variations (face, scaled_font); /* Note: We deliberately release the unscaled font's mutex here, * so that we are not holding a lock across two separate calls to * cairo function, (which would give the application some * opportunity for creating deadlock. This is obviously unsafe, * but as documented, the user must add manual locking when using * this function. */ CAIRO_FT_UNLOCK (scaled_font->unscaled); return face; } /** * cairo_ft_scaled_font_unlock_face: * @scaled_font: A #cairo_scaled_font_t from the FreeType font backend. Such an * object can be created by calling cairo_scaled_font_create() on a * FreeType backend font face (see cairo_ft_font_face_create_for_pattern(), * cairo_ft_font_face_create_for_ft_face()). * * Releases a face obtained with cairo_ft_scaled_font_lock_face(). * * Since: 1.0 **/ void cairo_ft_scaled_font_unlock_face (cairo_scaled_font_t *abstract_font) { cairo_ft_scaled_font_t *scaled_font = (cairo_ft_scaled_font_t *) abstract_font; if (! _cairo_scaled_font_is_ft (abstract_font)) { _cairo_error_throw (CAIRO_STATUS_FONT_TYPE_MISMATCH); return; } if (scaled_font->base.status) return; /* Note: We released the unscaled font's mutex at the end of * cairo_ft_scaled_font_lock_face, so we have to acquire it again * as _cairo_ft_unscaled_font_unlock_face expects it to be held * when we call into it. */ CAIRO_FT_LOCK (scaled_font->unscaled); _cairo_ft_unscaled_font_unlock_face (scaled_font->unscaled); } static cairo_bool_t _cairo_ft_scaled_font_is_vertical (cairo_scaled_font_t *scaled_font) { cairo_ft_scaled_font_t *ft_scaled_font; if (!_cairo_scaled_font_is_ft (scaled_font)) return FALSE; ft_scaled_font = (cairo_ft_scaled_font_t *) scaled_font; if (ft_scaled_font->ft_options.load_flags & FT_LOAD_VERTICAL_LAYOUT) return TRUE; return FALSE; } unsigned int _cairo_ft_scaled_font_get_load_flags (cairo_scaled_font_t *scaled_font) { cairo_ft_scaled_font_t *ft_scaled_font; if (! _cairo_scaled_font_is_ft (scaled_font)) return 0; ft_scaled_font = (cairo_ft_scaled_font_t *) scaled_font; return ft_scaled_font->ft_options.load_flags; } void _cairo_ft_font_reset_static_data (void) { _cairo_ft_unscaled_font_map_destroy (); }
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2026-05-26