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/* Pango
* pangocairo-coretextfont.c
*
* Copyright (C) 2000-2005 Red Hat Software
* Copyright (C) 2005-2007 Imendio AB
* Copyright (C) 2010 Kristian Rietveld <kris@gtk.org>
*
* 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"
#include <Carbon/Carbon.h>
#include "pango-impl-utils.h"
#include "pangocoretext-private.h"
#include "pangocairo.h"
#include "pangocairo-private.h"
#include "pangocairo-coretext.h"
#include "pangocairo-coretextfont.h"
struct _PangoCairoCoreTextFont
{
PangoCoreTextFont font;
PangoCairoFontPrivate cf_priv;
int abs_size;
};
struct _PangoCairoCoreTextFontClass
{
PangoCoreTextFontClass parent_class;
};
static cairo_font_face_t *pango_cairo_core_text_font_create_font_face (PangoCairoFont *font);
static PangoFontMetrics *pango_cairo_core_text_font_create_base_metrics_for_context (PangoCairoFont *font,
PangoContext *context);
static void
cairo_font_iface_init (PangoCairoFontIface *iface)
{
iface->create_font_face = pango_cairo_core_text_font_create_font_face;
iface->create_base_metrics_for_context = pango_cairo_core_text_font_create_base_metrics_for_context;
iface->cf_priv_offset = G_STRUCT_OFFSET (PangoCairoCoreTextFont, cf_priv);
}
G_DEFINE_TYPE_WITH_CODE (PangoCairoCoreTextFont, pango_cairo_core_text_font, PANGO_TYPE_CORE_TEXT_FONT,
{ G_IMPLEMENT_INTERFACE (PANGO_TYPE_CAIRO_FONT, cairo_font_iface_init) });
/* 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_core_text_font_get_glyph_extents (PangoFont *font,
PangoGlyph glyph,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect)
{
PangoCairoCoreTextFont *cafont = (PangoCairoCoreTextFont *) (font);
_pango_cairo_font_private_get_glyph_extents (&cafont->cf_priv,
glyph,
ink_rect,
logical_rect);
}
static cairo_font_face_t *
pango_cairo_core_text_font_create_font_face (PangoCairoFont *font)
{
PangoCoreTextFont *ctfont = (PangoCoreTextFont *) (font);
CTFontRef font_id;
CGFontRef cgfont;
cairo_font_face_t *cairo_face;
font_id = pango_core_text_font_get_ctfont (ctfont);
cgfont = CTFontCopyGraphicsFont (font_id, NULL);
cairo_face = cairo_quartz_font_face_create_for_cgfont (cgfont);
CFRelease (cgfont);
return cairo_face;
}
static PangoFontMetrics *
pango_cairo_core_text_font_create_base_metrics_for_context (PangoCairoFont *font,
PangoContext *context)
{
PangoCoreTextFont *cfont = (PangoCoreTextFont *) font;
PangoFontMetrics *metrics;
PangoFontDescription *font_desc;
PangoLayout *layout;
PangoRectangle extents;
PangoLanguage *language = pango_context_get_language (context);
const char *sample_str = pango_language_get_sample_string (language);
CTFontRef ctfont;
metrics = pango_font_metrics_new ();
ctfont = pango_core_text_font_get_ctfont (cfont);
metrics->ascent = CTFontGetAscent (ctfont) * PANGO_SCALE;
metrics->descent = CTFontGetDescent (ctfont) * PANGO_SCALE;
metrics->height = (CTFontGetAscent (ctfont) + CTFontGetDescent (ctfont) + CTFontGetLeading (ctfont)) * PANGO_SCALE;
metrics->underline_position = CTFontGetUnderlinePosition (ctfont) * PANGO_SCALE;
metrics->underline_thickness = CTFontGetUnderlineThickness (ctfont) * PANGO_SCALE;
metrics->strikethrough_position = metrics->ascent / 3;
metrics->strikethrough_thickness = CTFontGetUnderlineThickness (ctfont) * PANGO_SCALE;
return metrics;
}
static PangoFontDescription *
pango_cairo_core_text_font_describe_absolute (PangoFont *font)
{
PangoCairoCoreTextFont *cafont = (PangoCairoCoreTextFont *)font;
PangoFontDescription *desc = pango_font_describe (font);
pango_font_description_set_absolute_size (desc, cafont->abs_size);
return desc;
}
static void
pango_cairo_core_text_font_finalize (GObject *object)
{
PangoCairoCoreTextFont *cafont = (PangoCairoCoreTextFont *) object;
_pango_cairo_font_private_finalize (&cafont->cf_priv);
G_OBJECT_CLASS (pango_cairo_core_text_font_parent_class)->finalize (object);
}
static void
pango_cairo_core_text_font_class_init (PangoCairoCoreTextFontClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
PangoFontClass *font_class = PANGO_FONT_CLASS (class);
object_class->finalize = pango_cairo_core_text_font_finalize;
/* font_class->describe defined by parent class PangoCoreTextFont. */
font_class->get_glyph_extents = pango_cairo_core_text_font_get_glyph_extents;
font_class->get_metrics = _pango_cairo_font_get_metrics;
font_class->describe_absolute = pango_cairo_core_text_font_describe_absolute;
}
static void
pango_cairo_core_text_font_init (PangoCairoCoreTextFont *cafont G_GNUC_UNUSED)
{
}
PangoCoreTextFont *
_pango_cairo_core_text_font_new (PangoCairoCoreTextFontMap *cafontmap,
PangoCoreTextFontKey *key)
{
gboolean synthesize_italic = FALSE;
PangoCairoCoreTextFont *cafont;
PangoCoreTextFont *cfont;
CTFontRef font_ref;
CTFontDescriptorRef ctdescriptor;
CGFontRef font_id;
double size;
cairo_matrix_t font_matrix;
size = pango_units_to_double (pango_core_text_font_key_get_size (key));
size /= pango_matrix_get_font_scale_factor (pango_core_text_font_key_get_matrix (key));
ctdescriptor = pango_core_text_font_key_get_ctfontdescriptor (key);
font_ref = CTFontCreateWithFontDescriptor (ctdescriptor, size, NULL);
if (pango_core_text_font_key_get_synthetic_italic (key))
synthesize_italic = TRUE;
font_id = CTFontCopyGraphicsFont (font_ref, NULL);
if (!font_id)
return NULL;
cafont = g_object_new (PANGO_TYPE_CAIRO_CORE_TEXT_FONT, NULL);
cfont = PANGO_CORE_TEXT_FONT (cafont);
cafont->abs_size = pango_core_text_font_key_get_size (key);
_pango_core_text_font_set_ctfont (cfont, font_ref);
if (synthesize_italic)
cairo_matrix_init (&font_matrix,
1, 0,
-0.25, 1,
0, 0);
else
cairo_matrix_init_identity (&font_matrix);
cairo_matrix_scale (&font_matrix, size, size);
_pango_cairo_font_private_initialize (&cafont->cf_priv,
(PangoCairoFont *) cafont,
pango_core_text_font_key_get_gravity (key),
pango_core_text_font_key_get_context_key (key),
pango_core_text_font_key_get_matrix (key),
&font_matrix);
return cfont;
}
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