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Graydon Hoare
parent
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commit
c5aace21fb
2 changed files with 1148 additions and 0 deletions
574
src/cairo-ft-font.c
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574
src/cairo-ft-font.c
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/*
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* Copyright © 2003 Red Hat Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and that
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* both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of Red Hat Inc. not be used
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* in advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. Red Hat Inc. makes no
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* representations about the suitability of this software for any purpose.
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* It is provided "as is" without express or implied warranty.
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*
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* RED HAT INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL RED HAT INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
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* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Graydon Hoare <graydon@redhat.com>
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*/
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#include "cairoint.h"
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#include <fontconfig/fontconfig.h>
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#include <freetype/freetype.h>
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typedef struct {
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cairo_font_t base;
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FT_Face face;
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int owner_of_face_p;
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FcPattern *pattern;
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} cairo_ft_font_t;
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#define DOUBLE_TO_26_6(d) ((FT_F26Dot6)((d) * 63.0))
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#define DOUBLE_FROM_26_6(t) (((double)((t) >> 6)) \
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+ ((double)((t) & 0x3F) / 63.0))
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#define DOUBLE_TO_16_16(d) ((FT_Fixed)((d) * 65535.0))
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#define DOUBLE_FROM_16_16(t) (((double)((t) >> 16)) \
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+ ((double)((t) & 0xFFFF) / 65535.0))
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static FT_Library _cairo_ft_lib = NULL;
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static int _init_cairo_ft_lib ()
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{
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if (_cairo_ft_lib != NULL)
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return 1;
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if (FT_Init_FreeType (&_cairo_ft_lib) == 0
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&& _cairo_ft_lib != NULL)
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return 1;
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return 0;
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}
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/* implement the platform-specific interface */
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cairo_font_t *
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cairo_ft_font_create (FcPattern *pattern)
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{
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cairo_ft_font_t *f = NULL;
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char *filename = NULL;
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FT_Face face = NULL;
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int own_face = 0;
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FcPattern *resolved = NULL;
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FcResult result = FcResultMatch;
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if (!_init_cairo_ft_lib ())
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return NULL;
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FcConfigSubstitute (0, pattern, FcMatchPattern);
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FcDefaultSubstitute (pattern);
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resolved = FcFontMatch (0, pattern, &result);
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if (result != FcResultMatch)
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{
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if (resolved)
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FcPatternDestroy (resolved);
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return NULL;
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}
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/* If the pattern has an FT_Face object, use that. */
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if (FcPatternGetFTFace (resolved, FC_FT_FACE, 0, &face) != FcResultMatch
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|| face == NULL)
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{
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/* otherwise it had better have a filename */
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int open_res = 0;
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own_face = 1;
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result = FcPatternGetString (resolved, FC_FILE, 0, (FcChar8 **)(&filename));
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if (result == FcResultMatch)
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open_res = FT_New_Face (_cairo_ft_lib, filename, 0, &face);
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if (face == NULL)
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return NULL;
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}
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f = (cairo_ft_font_t *) cairo_ft_font_create_for_ft_face (face);
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if (f != NULL)
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f->pattern = FcPatternDuplicate (resolved);
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f->owner_of_face_p = own_face;
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FcPatternDestroy (resolved);
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return (cairo_font_t *) f;
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}
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FT_Face
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cairo_ft_font_face (cairo_font_t *font)
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{
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if (font == NULL)
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return NULL;
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return ((cairo_ft_font_t *) font)->face;
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}
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FcPattern *
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cairo_ft_font_pattern (cairo_font_t *font)
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{
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if (font == NULL)
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return NULL;
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return ((cairo_ft_font_t *) font)->pattern;
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}
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/* implement the backend interface */
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static cairo_font_t *
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_cairo_ft_font_create (char *family,
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cairo_font_slant_t slant,
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cairo_font_weight_t weight)
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{
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cairo_ft_font_t *ft_font = NULL;
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cairo_font_t *font = NULL;
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FcPattern * pat = NULL;
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int fcslant;
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int fcweight;
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pat = FcPatternCreate ();
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if (pat == NULL)
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return NULL;
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switch (weight)
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{
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case CAIRO_FONT_WEIGHT_NORMAL:
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fcweight = FC_WEIGHT_MEDIUM;
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break;
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case CAIRO_FONT_WEIGHT_BOLD:
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fcweight = FC_WEIGHT_BOLD;
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break;
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}
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switch (slant)
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{
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case CAIRO_FONT_SLANT_NORMAL:
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fcslant = FC_SLANT_ROMAN;
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break;
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case CAIRO_FONT_SLANT_ITALIC:
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fcslant = FC_SLANT_ITALIC;
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break;
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case CAIRO_FONT_SLANT_OBLIQUE:
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fcslant = FC_SLANT_OBLIQUE;
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break;
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}
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FcPatternAddString (pat, FC_FAMILY, family);
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FcPatternAddInteger (pat, FC_SLANT, fcslant);
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FcPatternAddInteger (pat, FC_WEIGHT, fcweight);
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font = cairo_ft_font_create (pat);
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ft_font = (cairo_ft_font_t *) font;
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FT_Set_Char_Size (ft_font->face,
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DOUBLE_TO_26_6 (1.0),
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DOUBLE_TO_26_6 (1.0),
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0, 0);
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FcPatternDestroy (pat);
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return font;
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}
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static cairo_font_t *
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_cairo_ft_font_copy (cairo_font_t *font)
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{
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cairo_ft_font_t * ft_font_new = NULL;
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cairo_ft_font_t * ft_font = NULL;
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if (font == NULL)
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return;
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ft_font = (cairo_ft_font_t *)font;
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ft_font_new = (cairo_ft_font_t *)cairo_ft_font_create_for_ft_face (ft_font->face);
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if (ft_font_new == NULL)
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return NULL;
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if (ft_font_new != NULL && ft_font->pattern != NULL)
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ft_font_new->pattern = FcPatternDuplicate (ft_font->pattern);
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return (cairo_font_t *)ft_font_new;
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}
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static void
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_cairo_ft_font_close (cairo_font_t *font)
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{
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cairo_ft_font_t * ft_font = NULL;
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if (font == NULL)
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return;
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ft_font = (cairo_ft_font_t *)font;
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if (ft_font->face != NULL && ft_font->owner_of_face_p)
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FT_Done_Face (ft_font->face);
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if (ft_font->pattern != NULL)
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FcPatternDestroy (ft_font->pattern);
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free (ft_font);
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}
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static void
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_utf8_to_ucs4 (char const *utf8,
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FT_ULong **ucs4,
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size_t *nchars)
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{
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int len = 0, step = 0;
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size_t n = 0, alloc = 0;
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FcChar32 u = 0;
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if (ucs4 == NULL || nchars == NULL)
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return;
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len = strlen (utf8);
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alloc = len;
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*ucs4 = malloc (sizeof (FT_ULong) * alloc);
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if (*ucs4 == NULL)
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return;
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while (len && (step = FcUtf8ToUcs4(utf8, &u, len)) > 0)
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{
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if (n == alloc)
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{
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alloc *= 2;
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*ucs4 = realloc (*ucs4, sizeof (FT_ULong) * alloc);
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if (*ucs4 == NULL)
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return;
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}
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(*ucs4)[n++] = u;
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len -= step;
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utf8 += step;
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}
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*nchars = alloc;
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}
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static void
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_get_scale_factors(cairo_matrix_t *matrix, double *sx, double *sy)
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{
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double e0, e1;
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e1 = 1.; e0 = 0.;
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cairo_matrix_transform_distance (matrix, &e1, &e0);
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*sx = sqrt(e1*e1 + e0*e0);
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e1 = 1.; e0 = 0.;
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cairo_matrix_transform_distance (matrix, &e0, &e1);
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*sy = sqrt(e1*e1 + e0*e0);
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}
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static void
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_install_font_matrix(cairo_matrix_t *matrix, FT_Face face)
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{
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cairo_matrix_t normalized;
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double scale_x, scale_y;
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double xx, xy, yx, yy, tx, ty;
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FT_Matrix mat;
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/* The font matrix has x and y "scale" components which we extract and
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* use as pixel scale values. These influence the way freetype chooses
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* hints, as well as selecting different bitmaps in hand-rendered
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* fonts. We also copy the normalized matrix to freetype's
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* transformation.
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*/
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_get_scale_factors(matrix, &scale_x, &scale_y);
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cairo_matrix_copy (&normalized, matrix);
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cairo_matrix_scale (&normalized, 1.0 / scale_x, 1.0 / scale_y);
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cairo_matrix_get_affine (&normalized,
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&xx /* 00 */ , &yx /* 01 */,
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&xy /* 10 */, &yy /* 11 */,
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&tx, &ty);
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mat.xx = DOUBLE_TO_16_16(xx);
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mat.xy = -DOUBLE_TO_16_16(xy);
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mat.yx = -DOUBLE_TO_16_16(yx);
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mat.yy = DOUBLE_TO_16_16(yy);
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FT_Set_Transform(face, &mat, NULL);
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FT_Set_Char_Size(face,
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DOUBLE_TO_26_6(scale_x),
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DOUBLE_TO_26_6(scale_y),
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0, 0);
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}
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int _utf8_to_glyphs (cairo_font_t *font,
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const unsigned char *utf8,
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cairo_glyph_t **glyphs,
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size_t *nglyphs)
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{
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cairo_ft_font_t *ft;
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double x = 0., y = 0.;
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size_t i;
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FT_ULong *ucs4 = NULL;
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if (font == NULL)
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return 0;
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ft = (cairo_ft_font_t *)font;
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_utf8_to_ucs4 (utf8, &ucs4, nglyphs);
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if (ucs4 == NULL)
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return 0;
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*glyphs = (cairo_glyph_t *) malloc ((*nglyphs) * (sizeof (cairo_glyph_t)));
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if (*glyphs == NULL)
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{
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free (ucs4);
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return 0;
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}
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_install_font_matrix (&font->matrix, ft->face);
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for (i = 0; i < *nglyphs; i++)
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{
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(*glyphs)[i].index = FT_Get_Char_Index (ft->face, ucs4[i]);
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(*glyphs)[i].x = x;
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(*glyphs)[i].y = y;
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FT_Load_Glyph (ft->face, (*glyphs)[i].index, FT_LOAD_DEFAULT);
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x += DOUBLE_FROM_26_6 (ft->face->glyph->advance.x);
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y -= DOUBLE_FROM_26_6 (ft->face->glyph->advance.y);
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}
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free (ucs4);
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return 1;
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}
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static cairo_status_t
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_cairo_ft_font_font_extents (cairo_font_t *font,
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cairo_font_extents_t *extents)
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{
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double scale_x, scale_y;
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cairo_ft_font_t *ft = (cairo_ft_font_t *)font;
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cairo_status_t status = CAIRO_STATUS_SUCCESS;
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_get_scale_factors(&font->matrix, &scale_x, &scale_y);
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#define FONT_UNIT_TO_DEV(x) ((double)(x) / (double)(ft->face->units_per_EM))
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extents->ascent = FONT_UNIT_TO_DEV(ft->face->ascender) * scale_y;
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extents->descent = FONT_UNIT_TO_DEV(ft->face->descender) * scale_y;
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extents->height = FONT_UNIT_TO_DEV(ft->face->height) * scale_y;
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extents->max_x_advance = FONT_UNIT_TO_DEV(ft->face->max_advance_width) * scale_x;
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extents->max_y_advance = FONT_UNIT_TO_DEV(ft->face->max_advance_height) * scale_y;
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return status;
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}
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static cairo_status_t
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_cairo_ft_font_glyph_extents (cairo_font_t *font,
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cairo_glyph_t *glyphs,
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int num_glyphs,
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cairo_text_extents_t *extents)
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{
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cairo_ft_font_t *ft;
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cairo_status_t status = CAIRO_STATUS_SUCCESS;
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if (font == NULL)
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return;
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ft = (cairo_ft_font_t *)font;
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/* FIXME: lift code from xft to do this */
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return status;
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}
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static cairo_status_t
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_cairo_ft_font_text_extents (cairo_font_t *font,
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const unsigned char *utf8,
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cairo_text_extents_t *extents)
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{
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cairo_glyph_t *glyphs;
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size_t nglyphs;
|
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cairo_status_t status = CAIRO_STATUS_SUCCESS;
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if (_utf8_to_glyphs (font, utf8, &glyphs, &nglyphs))
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{
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status = _cairo_ft_font_glyph_extents (font, glyphs, nglyphs,
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extents);
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free (glyphs);
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}
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return status;
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}
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|
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|
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static cairo_status_t
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_cairo_ft_font_show_glyphs (cairo_font_t *font,
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cairo_operator_t operator,
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cairo_surface_t *source,
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cairo_surface_t *surface,
|
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double x0,
|
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double y0,
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const cairo_glyph_t *glyphs,
|
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int num_glyphs)
|
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{
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int i;
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cairo_ft_font_t *ft = NULL;
|
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FT_GlyphSlot glyphslot;
|
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cairo_surface_t *mask = NULL;
|
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double x, y;
|
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int width, height, stride;
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if (font == NULL
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|| source == NULL
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|| surface == NULL
|
||||
|| glyphs == NULL)
|
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return CAIRO_STATUS_NO_MEMORY;
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ft = (cairo_ft_font_t *)font;
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glyphslot = ft->face->glyph;
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_install_font_matrix (&font->matrix, ft->face);
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for (i = 0; i < num_glyphs; i++)
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{
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FT_Load_Glyph (ft->face, glyphs[i].index, FT_LOAD_DEFAULT);
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FT_Render_Glyph (glyphslot, FT_RENDER_MODE_NORMAL);
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width = glyphslot->bitmap.width;
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height = glyphslot->bitmap.rows;
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stride = glyphslot->bitmap.pitch;
|
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|
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x = x0 + glyphs[i].x;
|
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y = y0 + glyphs[i].y;
|
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|
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/* X gets upset with zero-sized images (such as whitespace) */
|
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if (width * height != 0)
|
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{
|
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|
||||
mask = cairo_surface_create_for_image (glyphslot->bitmap.buffer,
|
||||
CAIRO_FORMAT_A8,
|
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width, height, stride);
|
||||
if (mask == NULL)
|
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return CAIRO_STATUS_NO_MEMORY;
|
||||
|
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_cairo_surface_composite (operator, source, mask, surface,
|
||||
0, 0, 0, 0,
|
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x + glyphslot->bitmap_left,
|
||||
y - glyphslot->bitmap_top,
|
||||
(double)width, (double)height);
|
||||
|
||||
cairo_surface_destroy (mask);
|
||||
}
|
||||
}
|
||||
return CAIRO_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_ft_font_show_text (cairo_font_t *font,
|
||||
cairo_operator_t operator,
|
||||
cairo_surface_t *source,
|
||||
cairo_surface_t *surface,
|
||||
double x0,
|
||||
double y0,
|
||||
const unsigned char *utf8)
|
||||
{
|
||||
cairo_glyph_t *glyphs;
|
||||
size_t nglyphs;
|
||||
|
||||
if (_utf8_to_glyphs (font, utf8, &glyphs, &nglyphs))
|
||||
{
|
||||
cairo_status_t res;
|
||||
res = _cairo_ft_font_show_glyphs (font, operator,
|
||||
source, surface, x0, y0,
|
||||
glyphs, nglyphs);
|
||||
free (glyphs);
|
||||
return res;
|
||||
}
|
||||
else
|
||||
return CAIRO_STATUS_NO_MEMORY;
|
||||
}
|
||||
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_ft_font_glyph_path (cairo_font_t *font,
|
||||
cairo_path_t *path,
|
||||
cairo_glyph_t *glyphs,
|
||||
int num_glyphs)
|
||||
{
|
||||
cairo_status_t status = CAIRO_STATUS_SUCCESS;
|
||||
cairo_ft_font_t *ft;
|
||||
|
||||
if (font == NULL)
|
||||
return;
|
||||
|
||||
ft = (cairo_ft_font_t *)font;
|
||||
|
||||
/* FIXME: lift code from xft to do this */
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_ft_font_text_path (cairo_font_t *font,
|
||||
cairo_path_t *path,
|
||||
const unsigned char *utf8)
|
||||
{
|
||||
cairo_glyph_t *glyphs;
|
||||
size_t nglyphs;
|
||||
|
||||
if (_utf8_to_glyphs (font, utf8, &glyphs, &nglyphs))
|
||||
{
|
||||
cairo_status_t res;
|
||||
res = _cairo_ft_font_glyph_path (font, path, glyphs, nglyphs);
|
||||
free (glyphs);
|
||||
return res;
|
||||
}
|
||||
else
|
||||
return CAIRO_STATUS_NO_MEMORY;
|
||||
}
|
||||
|
||||
|
||||
cairo_font_t *
|
||||
cairo_ft_font_create_for_ft_face (FT_Face face)
|
||||
{
|
||||
cairo_ft_font_t *f = NULL;
|
||||
|
||||
f = malloc (sizeof (cairo_ft_font_t));
|
||||
if (f == NULL)
|
||||
return NULL;
|
||||
memset (f, 0, sizeof (cairo_ft_font_t));
|
||||
|
||||
_cairo_font_init (&f->base,
|
||||
&cairo_ft_font_backend);
|
||||
|
||||
f->face = face;
|
||||
f->owner_of_face_p = 0;
|
||||
return (cairo_font_t *) f;
|
||||
}
|
||||
|
||||
|
||||
const struct cairo_font_backend cairo_ft_font_backend = {
|
||||
font_extents: (void *) _cairo_ft_font_font_extents,
|
||||
text_extents: (void *) _cairo_ft_font_text_extents,
|
||||
glyph_extents: (void *) _cairo_ft_font_glyph_extents,
|
||||
show_text: (void *) _cairo_ft_font_show_text,
|
||||
show_glyphs: (void *) _cairo_ft_font_show_glyphs,
|
||||
text_path: (void *) _cairo_ft_font_text_path,
|
||||
glyph_path: (void *) _cairo_ft_font_glyph_path,
|
||||
create: (void *) _cairo_ft_font_create,
|
||||
copy: (void *) _cairo_ft_font_copy,
|
||||
close: (void *) _cairo_ft_font_close
|
||||
};
|
||||
574
src/cairo_ft_font.c
Normal file
574
src/cairo_ft_font.c
Normal file
|
|
@ -0,0 +1,574 @@
|
|||
/*
|
||||
* Copyright © 2003 Red Hat Inc.
|
||||
*
|
||||
* Permission to use, copy, modify, distribute, and sell this software and
|
||||
* its documentation for any purpose is hereby granted without fee,
|
||||
* provided that the above copyright notice appear in all copies and that
|
||||
* both that copyright notice and this permission notice appear in
|
||||
* supporting documentation, and that the name of Red Hat Inc. not be used
|
||||
* in advertising or publicity pertaining to distribution of the software
|
||||
* without specific, written prior permission. Red Hat Inc. makes no
|
||||
* representations about the suitability of this software for any purpose.
|
||||
* It is provided "as is" without express or implied warranty.
|
||||
*
|
||||
* RED HAT INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
||||
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
||||
* EVENT SHALL RED HAT INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
||||
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
|
||||
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
|
||||
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
||||
* PERFORMANCE OF THIS SOFTWARE.
|
||||
*
|
||||
* Author: Graydon Hoare <graydon@redhat.com>
|
||||
*/
|
||||
|
||||
#include "cairoint.h"
|
||||
#include <fontconfig/fontconfig.h>
|
||||
#include <freetype/freetype.h>
|
||||
|
||||
typedef struct {
|
||||
cairo_font_t base;
|
||||
FT_Face face;
|
||||
int owner_of_face_p;
|
||||
FcPattern *pattern;
|
||||
} cairo_ft_font_t;
|
||||
|
||||
|
||||
#define DOUBLE_TO_26_6(d) ((FT_F26Dot6)((d) * 63.0))
|
||||
#define DOUBLE_FROM_26_6(t) (((double)((t) >> 6)) \
|
||||
+ ((double)((t) & 0x3F) / 63.0))
|
||||
#define DOUBLE_TO_16_16(d) ((FT_Fixed)((d) * 65535.0))
|
||||
#define DOUBLE_FROM_16_16(t) (((double)((t) >> 16)) \
|
||||
+ ((double)((t) & 0xFFFF) / 65535.0))
|
||||
|
||||
static FT_Library _cairo_ft_lib = NULL;
|
||||
static int _init_cairo_ft_lib ()
|
||||
{
|
||||
if (_cairo_ft_lib != NULL)
|
||||
return 1;
|
||||
|
||||
if (FT_Init_FreeType (&_cairo_ft_lib) == 0
|
||||
&& _cairo_ft_lib != NULL)
|
||||
return 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* implement the platform-specific interface */
|
||||
|
||||
cairo_font_t *
|
||||
cairo_ft_font_create (FcPattern *pattern)
|
||||
{
|
||||
cairo_ft_font_t *f = NULL;
|
||||
char *filename = NULL;
|
||||
FT_Face face = NULL;
|
||||
int own_face = 0;
|
||||
FcPattern *resolved = NULL;
|
||||
FcResult result = FcResultMatch;
|
||||
|
||||
if (!_init_cairo_ft_lib ())
|
||||
return NULL;
|
||||
|
||||
FcConfigSubstitute (0, pattern, FcMatchPattern);
|
||||
FcDefaultSubstitute (pattern);
|
||||
|
||||
resolved = FcFontMatch (0, pattern, &result);
|
||||
if (result != FcResultMatch)
|
||||
{
|
||||
if (resolved)
|
||||
FcPatternDestroy (resolved);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* If the pattern has an FT_Face object, use that. */
|
||||
if (FcPatternGetFTFace (resolved, FC_FT_FACE, 0, &face) != FcResultMatch
|
||||
|| face == NULL)
|
||||
{
|
||||
|
||||
/* otherwise it had better have a filename */
|
||||
int open_res = 0;
|
||||
own_face = 1;
|
||||
result = FcPatternGetString (resolved, FC_FILE, 0, (FcChar8 **)(&filename));
|
||||
|
||||
if (result == FcResultMatch)
|
||||
open_res = FT_New_Face (_cairo_ft_lib, filename, 0, &face);
|
||||
|
||||
if (face == NULL)
|
||||
return NULL;
|
||||
}
|
||||
|
||||
f = (cairo_ft_font_t *) cairo_ft_font_create_for_ft_face (face);
|
||||
if (f != NULL)
|
||||
f->pattern = FcPatternDuplicate (resolved);
|
||||
|
||||
f->owner_of_face_p = own_face;
|
||||
|
||||
FcPatternDestroy (resolved);
|
||||
return (cairo_font_t *) f;
|
||||
}
|
||||
|
||||
FT_Face
|
||||
cairo_ft_font_face (cairo_font_t *font)
|
||||
{
|
||||
if (font == NULL)
|
||||
return NULL;
|
||||
|
||||
return ((cairo_ft_font_t *) font)->face;
|
||||
}
|
||||
|
||||
FcPattern *
|
||||
cairo_ft_font_pattern (cairo_font_t *font)
|
||||
{
|
||||
if (font == NULL)
|
||||
return NULL;
|
||||
|
||||
return ((cairo_ft_font_t *) font)->pattern;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* implement the backend interface */
|
||||
|
||||
static cairo_font_t *
|
||||
_cairo_ft_font_create (char *family,
|
||||
cairo_font_slant_t slant,
|
||||
cairo_font_weight_t weight)
|
||||
{
|
||||
cairo_ft_font_t *ft_font = NULL;
|
||||
cairo_font_t *font = NULL;
|
||||
FcPattern * pat = NULL;
|
||||
int fcslant;
|
||||
int fcweight;
|
||||
|
||||
pat = FcPatternCreate ();
|
||||
if (pat == NULL)
|
||||
return NULL;
|
||||
|
||||
switch (weight)
|
||||
{
|
||||
case CAIRO_FONT_WEIGHT_NORMAL:
|
||||
fcweight = FC_WEIGHT_MEDIUM;
|
||||
break;
|
||||
case CAIRO_FONT_WEIGHT_BOLD:
|
||||
fcweight = FC_WEIGHT_BOLD;
|
||||
break;
|
||||
}
|
||||
|
||||
switch (slant)
|
||||
{
|
||||
case CAIRO_FONT_SLANT_NORMAL:
|
||||
fcslant = FC_SLANT_ROMAN;
|
||||
break;
|
||||
case CAIRO_FONT_SLANT_ITALIC:
|
||||
fcslant = FC_SLANT_ITALIC;
|
||||
break;
|
||||
case CAIRO_FONT_SLANT_OBLIQUE:
|
||||
fcslant = FC_SLANT_OBLIQUE;
|
||||
break;
|
||||
}
|
||||
|
||||
FcPatternAddString (pat, FC_FAMILY, family);
|
||||
FcPatternAddInteger (pat, FC_SLANT, fcslant);
|
||||
FcPatternAddInteger (pat, FC_WEIGHT, fcweight);
|
||||
|
||||
font = cairo_ft_font_create (pat);
|
||||
ft_font = (cairo_ft_font_t *) font;
|
||||
|
||||
FT_Set_Char_Size (ft_font->face,
|
||||
DOUBLE_TO_26_6 (1.0),
|
||||
DOUBLE_TO_26_6 (1.0),
|
||||
0, 0);
|
||||
|
||||
FcPatternDestroy (pat);
|
||||
return font;
|
||||
}
|
||||
|
||||
|
||||
static cairo_font_t *
|
||||
_cairo_ft_font_copy (cairo_font_t *font)
|
||||
{
|
||||
cairo_ft_font_t * ft_font_new = NULL;
|
||||
cairo_ft_font_t * ft_font = NULL;
|
||||
|
||||
if (font == NULL)
|
||||
return;
|
||||
|
||||
ft_font = (cairo_ft_font_t *)font;
|
||||
|
||||
ft_font_new = (cairo_ft_font_t *)cairo_ft_font_create_for_ft_face (ft_font->face);
|
||||
if (ft_font_new == NULL)
|
||||
return NULL;
|
||||
|
||||
if (ft_font_new != NULL && ft_font->pattern != NULL)
|
||||
ft_font_new->pattern = FcPatternDuplicate (ft_font->pattern);
|
||||
|
||||
return (cairo_font_t *)ft_font_new;
|
||||
}
|
||||
|
||||
static void
|
||||
_cairo_ft_font_close (cairo_font_t *font)
|
||||
{
|
||||
cairo_ft_font_t * ft_font = NULL;
|
||||
|
||||
if (font == NULL)
|
||||
return;
|
||||
|
||||
ft_font = (cairo_ft_font_t *)font;
|
||||
|
||||
if (ft_font->face != NULL && ft_font->owner_of_face_p)
|
||||
FT_Done_Face (ft_font->face);
|
||||
|
||||
if (ft_font->pattern != NULL)
|
||||
FcPatternDestroy (ft_font->pattern);
|
||||
|
||||
free (ft_font);
|
||||
}
|
||||
|
||||
static void
|
||||
_utf8_to_ucs4 (char const *utf8,
|
||||
FT_ULong **ucs4,
|
||||
size_t *nchars)
|
||||
{
|
||||
int len = 0, step = 0;
|
||||
size_t n = 0, alloc = 0;
|
||||
FcChar32 u = 0;
|
||||
|
||||
if (ucs4 == NULL || nchars == NULL)
|
||||
return;
|
||||
|
||||
len = strlen (utf8);
|
||||
alloc = len;
|
||||
*ucs4 = malloc (sizeof (FT_ULong) * alloc);
|
||||
if (*ucs4 == NULL)
|
||||
return;
|
||||
|
||||
while (len && (step = FcUtf8ToUcs4(utf8, &u, len)) > 0)
|
||||
{
|
||||
if (n == alloc)
|
||||
{
|
||||
alloc *= 2;
|
||||
*ucs4 = realloc (*ucs4, sizeof (FT_ULong) * alloc);
|
||||
if (*ucs4 == NULL)
|
||||
return;
|
||||
}
|
||||
(*ucs4)[n++] = u;
|
||||
len -= step;
|
||||
utf8 += step;
|
||||
}
|
||||
*nchars = alloc;
|
||||
}
|
||||
|
||||
static void
|
||||
_get_scale_factors(cairo_matrix_t *matrix, double *sx, double *sy)
|
||||
{
|
||||
double e0, e1;
|
||||
e1 = 1.; e0 = 0.;
|
||||
|
||||
cairo_matrix_transform_distance (matrix, &e1, &e0);
|
||||
*sx = sqrt(e1*e1 + e0*e0);
|
||||
|
||||
e1 = 1.; e0 = 0.;
|
||||
cairo_matrix_transform_distance (matrix, &e0, &e1);
|
||||
*sy = sqrt(e1*e1 + e0*e0);
|
||||
}
|
||||
|
||||
static void
|
||||
_install_font_matrix(cairo_matrix_t *matrix, FT_Face face)
|
||||
{
|
||||
cairo_matrix_t normalized;
|
||||
double scale_x, scale_y;
|
||||
double xx, xy, yx, yy, tx, ty;
|
||||
FT_Matrix mat;
|
||||
|
||||
/* The font matrix has x and y "scale" components which we extract and
|
||||
* use as pixel 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.
|
||||
*/
|
||||
|
||||
_get_scale_factors(matrix, &scale_x, &scale_y);
|
||||
|
||||
cairo_matrix_copy (&normalized, matrix);
|
||||
|
||||
cairo_matrix_scale (&normalized, 1.0 / scale_x, 1.0 / scale_y);
|
||||
cairo_matrix_get_affine (&normalized,
|
||||
&xx /* 00 */ , &yx /* 01 */,
|
||||
&xy /* 10 */, &yy /* 11 */,
|
||||
&tx, &ty);
|
||||
|
||||
mat.xx = DOUBLE_TO_16_16(xx);
|
||||
mat.xy = -DOUBLE_TO_16_16(xy);
|
||||
mat.yx = -DOUBLE_TO_16_16(yx);
|
||||
mat.yy = DOUBLE_TO_16_16(yy);
|
||||
|
||||
FT_Set_Transform(face, &mat, NULL);
|
||||
FT_Set_Char_Size(face,
|
||||
DOUBLE_TO_26_6(scale_x),
|
||||
DOUBLE_TO_26_6(scale_y),
|
||||
0, 0);
|
||||
}
|
||||
|
||||
|
||||
int _utf8_to_glyphs (cairo_font_t *font,
|
||||
const unsigned char *utf8,
|
||||
cairo_glyph_t **glyphs,
|
||||
size_t *nglyphs)
|
||||
{
|
||||
cairo_ft_font_t *ft;
|
||||
double x = 0., y = 0.;
|
||||
size_t i;
|
||||
FT_ULong *ucs4 = NULL;
|
||||
|
||||
if (font == NULL)
|
||||
return 0;
|
||||
|
||||
ft = (cairo_ft_font_t *)font;
|
||||
|
||||
_utf8_to_ucs4 (utf8, &ucs4, nglyphs);
|
||||
|
||||
if (ucs4 == NULL)
|
||||
return 0;
|
||||
|
||||
*glyphs = (cairo_glyph_t *) malloc ((*nglyphs) * (sizeof (cairo_glyph_t)));
|
||||
if (*glyphs == NULL)
|
||||
{
|
||||
free (ucs4);
|
||||
return 0;
|
||||
}
|
||||
|
||||
_install_font_matrix (&font->matrix, ft->face);
|
||||
|
||||
for (i = 0; i < *nglyphs; i++)
|
||||
{
|
||||
(*glyphs)[i].index = FT_Get_Char_Index (ft->face, ucs4[i]);
|
||||
(*glyphs)[i].x = x;
|
||||
(*glyphs)[i].y = y;
|
||||
|
||||
FT_Load_Glyph (ft->face, (*glyphs)[i].index, FT_LOAD_DEFAULT);
|
||||
|
||||
x += DOUBLE_FROM_26_6 (ft->face->glyph->advance.x);
|
||||
y -= DOUBLE_FROM_26_6 (ft->face->glyph->advance.y);
|
||||
}
|
||||
|
||||
free (ucs4);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_ft_font_font_extents (cairo_font_t *font,
|
||||
cairo_font_extents_t *extents)
|
||||
{
|
||||
double scale_x, scale_y;
|
||||
cairo_ft_font_t *ft = (cairo_ft_font_t *)font;
|
||||
cairo_status_t status = CAIRO_STATUS_SUCCESS;
|
||||
|
||||
_get_scale_factors(&font->matrix, &scale_x, &scale_y);
|
||||
|
||||
#define FONT_UNIT_TO_DEV(x) ((double)(x) / (double)(ft->face->units_per_EM))
|
||||
|
||||
extents->ascent = FONT_UNIT_TO_DEV(ft->face->ascender) * scale_y;
|
||||
extents->descent = FONT_UNIT_TO_DEV(ft->face->descender) * scale_y;
|
||||
extents->height = FONT_UNIT_TO_DEV(ft->face->height) * scale_y;
|
||||
extents->max_x_advance = FONT_UNIT_TO_DEV(ft->face->max_advance_width) * scale_x;
|
||||
extents->max_y_advance = FONT_UNIT_TO_DEV(ft->face->max_advance_height) * scale_y;
|
||||
return status;
|
||||
}
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_ft_font_glyph_extents (cairo_font_t *font,
|
||||
cairo_glyph_t *glyphs,
|
||||
int num_glyphs,
|
||||
cairo_text_extents_t *extents)
|
||||
{
|
||||
cairo_ft_font_t *ft;
|
||||
cairo_status_t status = CAIRO_STATUS_SUCCESS;
|
||||
|
||||
if (font == NULL)
|
||||
return;
|
||||
|
||||
ft = (cairo_ft_font_t *)font;
|
||||
|
||||
/* FIXME: lift code from xft to do this */
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_ft_font_text_extents (cairo_font_t *font,
|
||||
const unsigned char *utf8,
|
||||
cairo_text_extents_t *extents)
|
||||
{
|
||||
cairo_glyph_t *glyphs;
|
||||
size_t nglyphs;
|
||||
cairo_status_t status = CAIRO_STATUS_SUCCESS;
|
||||
|
||||
if (_utf8_to_glyphs (font, utf8, &glyphs, &nglyphs))
|
||||
{
|
||||
status = _cairo_ft_font_glyph_extents (font, glyphs, nglyphs,
|
||||
extents);
|
||||
free (glyphs);
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_ft_font_show_glyphs (cairo_font_t *font,
|
||||
cairo_operator_t operator,
|
||||
cairo_surface_t *source,
|
||||
cairo_surface_t *surface,
|
||||
double x0,
|
||||
double y0,
|
||||
const cairo_glyph_t *glyphs,
|
||||
int num_glyphs)
|
||||
{
|
||||
int i;
|
||||
cairo_ft_font_t *ft = NULL;
|
||||
FT_GlyphSlot glyphslot;
|
||||
cairo_surface_t *mask = NULL;
|
||||
|
||||
double x, y;
|
||||
int width, height, stride;
|
||||
|
||||
if (font == NULL
|
||||
|| source == NULL
|
||||
|| surface == NULL
|
||||
|| glyphs == NULL)
|
||||
return CAIRO_STATUS_NO_MEMORY;
|
||||
|
||||
ft = (cairo_ft_font_t *)font;
|
||||
glyphslot = ft->face->glyph;
|
||||
_install_font_matrix (&font->matrix, ft->face);
|
||||
|
||||
for (i = 0; i < num_glyphs; i++)
|
||||
{
|
||||
FT_Load_Glyph (ft->face, glyphs[i].index, FT_LOAD_DEFAULT);
|
||||
FT_Render_Glyph (glyphslot, FT_RENDER_MODE_NORMAL);
|
||||
|
||||
width = glyphslot->bitmap.width;
|
||||
height = glyphslot->bitmap.rows;
|
||||
stride = glyphslot->bitmap.pitch;
|
||||
|
||||
x = x0 + glyphs[i].x;
|
||||
y = y0 + glyphs[i].y;
|
||||
|
||||
/* X gets upset with zero-sized images (such as whitespace) */
|
||||
if (width * height != 0)
|
||||
{
|
||||
|
||||
mask = cairo_surface_create_for_image (glyphslot->bitmap.buffer,
|
||||
CAIRO_FORMAT_A8,
|
||||
width, height, stride);
|
||||
if (mask == NULL)
|
||||
return CAIRO_STATUS_NO_MEMORY;
|
||||
|
||||
_cairo_surface_composite (operator, source, mask, surface,
|
||||
0, 0, 0, 0,
|
||||
x + glyphslot->bitmap_left,
|
||||
y - glyphslot->bitmap_top,
|
||||
(double)width, (double)height);
|
||||
|
||||
cairo_surface_destroy (mask);
|
||||
}
|
||||
}
|
||||
return CAIRO_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_ft_font_show_text (cairo_font_t *font,
|
||||
cairo_operator_t operator,
|
||||
cairo_surface_t *source,
|
||||
cairo_surface_t *surface,
|
||||
double x0,
|
||||
double y0,
|
||||
const unsigned char *utf8)
|
||||
{
|
||||
cairo_glyph_t *glyphs;
|
||||
size_t nglyphs;
|
||||
|
||||
if (_utf8_to_glyphs (font, utf8, &glyphs, &nglyphs))
|
||||
{
|
||||
cairo_status_t res;
|
||||
res = _cairo_ft_font_show_glyphs (font, operator,
|
||||
source, surface, x0, y0,
|
||||
glyphs, nglyphs);
|
||||
free (glyphs);
|
||||
return res;
|
||||
}
|
||||
else
|
||||
return CAIRO_STATUS_NO_MEMORY;
|
||||
}
|
||||
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_ft_font_glyph_path (cairo_font_t *font,
|
||||
cairo_path_t *path,
|
||||
cairo_glyph_t *glyphs,
|
||||
int num_glyphs)
|
||||
{
|
||||
cairo_status_t status = CAIRO_STATUS_SUCCESS;
|
||||
cairo_ft_font_t *ft;
|
||||
|
||||
if (font == NULL)
|
||||
return;
|
||||
|
||||
ft = (cairo_ft_font_t *)font;
|
||||
|
||||
/* FIXME: lift code from xft to do this */
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_ft_font_text_path (cairo_font_t *font,
|
||||
cairo_path_t *path,
|
||||
const unsigned char *utf8)
|
||||
{
|
||||
cairo_glyph_t *glyphs;
|
||||
size_t nglyphs;
|
||||
|
||||
if (_utf8_to_glyphs (font, utf8, &glyphs, &nglyphs))
|
||||
{
|
||||
cairo_status_t res;
|
||||
res = _cairo_ft_font_glyph_path (font, path, glyphs, nglyphs);
|
||||
free (glyphs);
|
||||
return res;
|
||||
}
|
||||
else
|
||||
return CAIRO_STATUS_NO_MEMORY;
|
||||
}
|
||||
|
||||
|
||||
cairo_font_t *
|
||||
cairo_ft_font_create_for_ft_face (FT_Face face)
|
||||
{
|
||||
cairo_ft_font_t *f = NULL;
|
||||
|
||||
f = malloc (sizeof (cairo_ft_font_t));
|
||||
if (f == NULL)
|
||||
return NULL;
|
||||
memset (f, 0, sizeof (cairo_ft_font_t));
|
||||
|
||||
_cairo_font_init (&f->base,
|
||||
&cairo_ft_font_backend);
|
||||
|
||||
f->face = face;
|
||||
f->owner_of_face_p = 0;
|
||||
return (cairo_font_t *) f;
|
||||
}
|
||||
|
||||
|
||||
const struct cairo_font_backend cairo_ft_font_backend = {
|
||||
font_extents: (void *) _cairo_ft_font_font_extents,
|
||||
text_extents: (void *) _cairo_ft_font_text_extents,
|
||||
glyph_extents: (void *) _cairo_ft_font_glyph_extents,
|
||||
show_text: (void *) _cairo_ft_font_show_text,
|
||||
show_glyphs: (void *) _cairo_ft_font_show_glyphs,
|
||||
text_path: (void *) _cairo_ft_font_text_path,
|
||||
glyph_path: (void *) _cairo_ft_font_glyph_path,
|
||||
create: (void *) _cairo_ft_font_create,
|
||||
copy: (void *) _cairo_ft_font_copy,
|
||||
close: (void *) _cairo_ft_font_close
|
||||
};
|
||||
Loading…
Add table
Reference in a new issue