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/* Pango
* pangofc-private.h: Private routines and declarations for generic
* fontconfig operation
*
* Copyright (C) 2003 Red Hat Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __PANGOFC_PRIVATE_H__
#define __PANGOFC_PRIVATE_H__
#include <pangofc-fontmap.h>
G_BEGIN_DECLS
typedef struct _PangoFcMetricsInfo PangoFcMetricsInfo;
struct _PangoFcMetricsInfo
{
const char *sample_str;
PangoFontMetrics *metrics;
};
typedef struct _PangoFcCmapCacheEntry PangoFcCmapCacheEntry;
typedef struct _PangoFcCmapCache PangoFcCmapCache;
#define CMAP_CACHE_NUM_ENTRIES 256 /* should be power of two */
#define CMAP_CACHE_MASK (CMAP_CACHE_NUM_ENTRIES - 1)
struct _PangoFcCmapCacheEntry
{
gunichar ch;
PangoGlyph glyph;
};
struct _PangoFcCmapCache
{
guint ref_count;
PangoFcCmapCacheEntry entries[CMAP_CACHE_NUM_ENTRIES];
};
#define PANGO_SCALE_26_6 (PANGO_SCALE / (1<<6))
#define PANGO_PIXELS_26_6(d) \
(((d) >= 0) ? \
((d) + PANGO_SCALE_26_6 / 2) / PANGO_SCALE_26_6 : \
((d) - PANGO_SCALE_26_6 / 2) / PANGO_SCALE_26_6)
#define PANGO_UNITS_26_6(d) (PANGO_SCALE_26_6 * (d))
void _pango_fc_font_shutdown (PangoFcFont *fcfont);
void _pango_fc_font_map_remove (PangoFcFontMap *fcfontmap,
PangoFcFont *fcfont);
PangoCoverage *_pango_fc_font_map_get_coverage (PangoFcFontMap *fcfontmap,
PangoFcFont *fcfont);
PangoCoverage *_pango_fc_font_map_fc_to_coverage (FcCharSet *charset);
PangoFcCmapCache *_pango_fc_font_map_get_cmap_cache (PangoFcFontMap *fcfontmap,
PangoFcFont *fcfont);
void _pango_fc_cmap_cache_unref (PangoFcCmapCache *cmap_cache);
PangoFcDecoder *_pango_fc_font_get_decoder (PangoFcFont *font);
void _pango_fc_font_set_decoder (PangoFcFont *font,
PangoFcDecoder *decoder);
PangoFcFontKey *_pango_fc_font_get_font_key (PangoFcFont *fcfont);
void _pango_fc_font_set_font_key (PangoFcFont *fcfont,
PangoFcFontKey *key);
void pango_fc_font_get_raw_extents (PangoFcFont *font,
FT_Int32 load_flags,
PangoGlyph glyph,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect);
PangoFontMetrics *pango_fc_font_create_base_metrics_for_context (PangoFcFont *font,
PangoContext *context);
/* To be made public at some point */
#include <math.h>
static G_GNUC_UNUSED void
pango_matrix_get_font_scale_factors (const PangoMatrix *matrix,
double *xscale, double *yscale)
{
/*
* Based on cairo-matrix.c:_cairo_matrix_compute_scale_factors()
*
* Copyright 2005, Keith Packard
*/
double major = 0, minor = 0;
if (matrix) {
double det = matrix->xx * matrix->yy - matrix->yx * matrix->xy;
if (det)
{
double x = matrix->xx;
double y = matrix->yx;
major = sqrt (x*x + y*y);
/*
* ignore mirroring
*/
if (det < 0)
det = - det;
if (major)
minor = det / major;
}
}
if (xscale)
*xscale = major;
if (yscale)
*yscale = minor;
}
G_END_DECLS
#endif /* __PANGOFC_PRIVATE_H__ */
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