/* Pango
* pangocairofc-font.c: Cairo font handling, fontconfig backend
*
* Copyright (C) 2000-2005 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.
*/
#include "config.h"
/* Freetype has undefined macros in its header */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wundef"
#include <cairo-ft.h>
#pragma GCC diagnostic pop
#include "pango-fontmap.h"
#include "pangocairo-private.h"
#include "pangocairo-fc.h"
#include "pangofc-private.h"
#include "pango-impl-utils.h"
#include <hb-ot.h>
#include <freetype/ftmm.h>
#define PANGO_TYPE_CAIRO_FC_FONT (pango_cairo_fc_font_get_type ())
#define PANGO_CAIRO_FC_FONT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_CAIRO_FC_FONT, PangoCairoFcFont))
#define PANGO_CAIRO_FC_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_CAIRO_FC_FONT, PangoCairoFcFontClass))
#define PANGO_CAIRO_IS_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_CAIRO_FC_FONT))
#define PANGO_CAIRO_FC_FONT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_CAIRO_FC_FONT, PangoCairoFcFontClass))
typedef struct _PangoCairoFcFont PangoCairoFcFont;
typedef struct _PangoCairoFcFontClass PangoCairoFcFontClass;
struct _PangoCairoFcFont
{
PangoFcFont font;
PangoCairoFontPrivate cf_priv;
};
struct _PangoCairoFcFontClass
{
PangoFcFontClass parent_class;
};
_PANGO_EXTERN
GType pango_cairo_fc_font_get_type (void);
/********************************
* Method implementations *
********************************/
static cairo_font_face_t *
pango_cairo_fc_font_create_font_face (PangoCairoFont *cfont)
{
PangoFcFont *fcfont = (PangoFcFont *) (cfont);
return cairo_ft_font_face_create_for_pattern (fcfont->font_pattern);
}
static PangoFontMetrics *
pango_cairo_fc_font_create_base_metrics_for_context (PangoCairoFont *cfont,
PangoContext *context)
{
PangoFcFont *fcfont = (PangoFcFont *) (cfont);
return pango_fc_font_create_base_metrics_for_context (fcfont, context);
}
static void
cairo_font_iface_init (PangoCairoFontIface *iface)
{
iface->create_font_face = pango_cairo_fc_font_create_font_face;
iface->create_base_metrics_for_context = pango_cairo_fc_font_create_base_metrics_for_context;
iface->cf_priv_offset = G_STRUCT_OFFSET (PangoCairoFcFont, cf_priv);
}
G_DEFINE_TYPE_WITH_CODE (PangoCairoFcFont, pango_cairo_fc_font, PANGO_TYPE_FC_FONT,
{ G_IMPLEMENT_INTERFACE (PANGO_TYPE_CAIRO_FONT, cairo_font_iface_init) })
static void
pango_cairo_fc_font_finalize (GObject *object)
{
PangoCairoFcFont *cffont = (PangoCairoFcFont *) object;
_pango_cairo_font_private_finalize (&cffont->cf_priv);
G_OBJECT_CLASS (pango_cairo_fc_font_parent_class)->finalize (object);
}
/* we want get_glyph_extents extremely fast, so we use a small wrapper here
* to avoid having to lookup the interface data like we do for get_metrics
* in _pango_cairo_font_get_metrics(). */
static void
pango_cairo_fc_font_get_glyph_extents (PangoFont *font,
PangoGlyph glyph,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect)
{
PangoCairoFcFont *cffont = (PangoCairoFcFont *) (font);
_pango_cairo_font_private_get_glyph_extents (&cffont->cf_priv,
glyph,
ink_rect,
logical_rect);
}
static FT_Face
pango_cairo_fc_font_lock_face (PangoFcFont *font)
{
PangoCairoFcFont *cffont = (PangoCairoFcFont *) (font);
cairo_scaled_font_t *scaled_font = _pango_cairo_font_private_get_scaled_font (&cffont->cf_priv);
if (G_UNLIKELY (!scaled_font))
return NULL;
return cairo_ft_scaled_font_lock_face (scaled_font);
}
static void
pango_cairo_fc_font_unlock_face (PangoFcFont *font)
{
PangoCairoFcFont *cffont = (PangoCairoFcFont *) (font);
cairo_scaled_font_t *scaled_font = _pango_cairo_font_private_get_scaled_font (&cffont->cf_priv);
if (G_UNLIKELY (!scaled_font))
return;
cairo_ft_scaled_font_unlock_face (scaled_font);
}
static void
pango_cairo_fc_font_class_init (PangoCairoFcFontClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
PangoFontClass *font_class = PANGO_FONT_CLASS (class);
PangoFcFontClass *fc_font_class = PANGO_FC_FONT_CLASS (class);
object_class->finalize = pango_cairo_fc_font_finalize;
font_class->get_glyph_extents = pango_cairo_fc_font_get_glyph_extents;
font_class->get_metrics = _pango_cairo_font_get_metrics;
fc_font_class->lock_face = pango_cairo_fc_font_lock_face;
fc_font_class->unlock_face = pango_cairo_fc_font_unlock_face;
}
static void
pango_cairo_fc_font_init (PangoCairoFcFont *cffont G_GNUC_UNUSED)
{
}
/********************
* Private API *
********************/
static double
get_font_size (const FcPattern *pattern)
{
double size;
double dpi;
if (FcPatternGetDouble (pattern, FC_PIXEL_SIZE, 0, &size) == FcResultMatch)
return size;
/* Just in case FC_PIXEL_SIZE got unset between pango_fc_make_pattern()
* and here. That would be very weird.
*/
if (FcPatternGetDouble (pattern, FC_DPI, 0, &dpi) != FcResultMatch)
dpi = 72;
if (FcPatternGetDouble (pattern, FC_SIZE, 0, &size) == FcResultMatch)
return size * dpi / 72.;
/* Whatever */
return 18.;
}
static gpointer
get_gravity_class (void)
{
static GEnumClass *class = NULL; /* MT-safe */
if (g_once_init_enter (&class))
g_once_init_leave(&class, (gpointer)g_type_class_ref (PANGO_TYPE_GRAVITY));
return class;
}
static PangoGravity
get_gravity (const FcPattern *pattern)
{
char *s;
if (FcPatternGetString (pattern, PANGO_FC_GRAVITY, 0, (FcChar8 **)(void *)&s) == FcResultMatch)
{
GEnumValue *value = g_enum_get_value_by_nick (get_gravity_class (), s);
return value->value;
}
return PANGO_GRAVITY_SOUTH;
}
PangoFcFont *
_pango_cairo_fc_font_new (PangoCairoFcFontMap *cffontmap,
PangoFcFontKey *key)
{
PangoCairoFcFont *cffont;
const FcPattern *pattern = pango_fc_font_key_get_pattern (key);
cairo_matrix_t font_matrix;
FcMatrix fc_matrix, *fc_matrix_val;
double size;
int i;
cairo_font_options_t *options;
g_return_val_if_fail (PANGO_IS_CAIRO_FC_FONT_MAP (cffontmap), NULL);
g_return_val_if_fail (pattern != NULL, NULL);
cffont = g_object_new (PANGO_TYPE_CAIRO_FC_FONT,
"pattern", pattern,
"fontmap", cffontmap,
NULL);
size = get_font_size (pattern) /
pango_matrix_get_font_scale_factor (pango_fc_font_key_get_matrix (key));
FcMatrixInit (&fc_matrix);
for (i = 0; FcPatternGetMatrix (pattern, FC_MATRIX, i, &fc_matrix_val) == FcResultMatch; i++)
FcMatrixMultiply (&fc_matrix, &fc_matrix, fc_matrix_val);
cairo_matrix_init (&font_matrix,
fc_matrix.xx,
- fc_matrix.yx,
- fc_matrix.xy,
fc_matrix.yy,
0., 0.);
cairo_matrix_scale (&font_matrix, size, size);
options = pango_fc_font_key_get_context_key (key);
_pango_cairo_font_private_initialize (&cffont->cf_priv,
(PangoCairoFont *) cffont,
get_gravity (pattern),
options,
pango_fc_font_key_get_matrix (key),
&font_matrix);
((PangoFcFont *)(cffont))->is_hinted = _pango_cairo_font_private_is_metrics_hinted (&cffont->cf_priv);
return (PangoFcFont *) cffont;
}