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/* Pango
* pangocairowin32-font.c: Cairo font handling, Win32 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"
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include "pango-fontmap.h"
#include "pango-impl-utils.h"
#include "pangocairo-private.h"
#include "pangocairo-win32.h"
#include <cairo-win32.h>
#define PANGO_TYPE_CAIRO_WIN32_FONT (pango_cairo_win32_font_get_type ())
#define PANGO_CAIRO_WIN32_FONT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_CAIRO_WIN32_FONT, PangoCairoWin32Font))
#define PANGO_CAIRO_WIN32_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_CAIRO_WIN32_FONT, PangoCairoWin32FontClass))
#define PANGO_CAIRO_IS_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_CAIRO_WIN32_FONT))
#define PANGO_CAIRO_WIN32_FONT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_CAIRO_WIN32_FONT, PangoCairoWin32FontClass))
typedef struct _PangoCairoWin32Font PangoCairoWin32Font;
typedef struct _PangoCairoWin32FontClass PangoCairoWin32FontClass;
struct _PangoCairoWin32Font
{
PangoWin32Font font;
PangoCairoFontPrivate cf_priv;
};
struct _PangoCairoWin32FontClass
{
PangoWin32FontClass parent_class;
};
GType pango_cairo_win32_font_get_type (void);
static cairo_font_face_t *pango_cairo_win32_font_create_font_face (PangoCairoFont *font);
static PangoFontMetrics *pango_cairo_win32_font_create_base_metrics_for_context (PangoCairoFont *font,
PangoContext *context);
static void
cairo_font_iface_init (PangoCairoFontIface *iface)
{
iface->create_font_face = pango_cairo_win32_font_create_font_face;
iface->create_base_metrics_for_context = pango_cairo_win32_font_create_base_metrics_for_context;
iface->cf_priv_offset = G_STRUCT_OFFSET (PangoCairoWin32Font, cf_priv);
}
G_DEFINE_TYPE_WITH_CODE (PangoCairoWin32Font, pango_cairo_win32_font, PANGO_TYPE_WIN32_FONT,
{ G_IMPLEMENT_INTERFACE (PANGO_TYPE_CAIRO_FONT, cairo_font_iface_init) });
static cairo_font_face_t *
pango_cairo_win32_font_create_font_face (PangoCairoFont *font)
{
PangoCairoWin32Font *cwfont = PANGO_CAIRO_WIN32_FONT (font);
PangoWin32Font *win32font = &cwfont->font;
return cairo_win32_font_face_create_for_logfontw (&win32font->logfontw);
}
static PangoFontMetrics *
pango_cairo_win32_font_create_base_metrics_for_context (PangoCairoFont *font,
PangoContext *context)
{
PangoFontMetrics *metrics;
cairo_scaled_font_t *scaled_font;
cairo_font_extents_t font_extents;
double height;
metrics = pango_font_metrics_new ();
scaled_font = pango_cairo_font_get_scaled_font (font);
cairo_scaled_font_extents (scaled_font, &font_extents);
cairo_win32_scaled_font_done_font (scaled_font);
metrics->ascent = font_extents.ascent * PANGO_SCALE;
metrics->descent = font_extents.descent * PANGO_SCALE;
/* FIXME: Should get the real settings for these from the TrueType
* font file.
*/
height = metrics->ascent + metrics->descent;
metrics->underline_thickness = height / 14;
metrics->underline_position = - metrics->underline_thickness;
metrics->strikethrough_thickness = metrics->underline_thickness;
metrics->strikethrough_position = height / 4;
pango_quantize_line_geometry (&metrics->underline_thickness,
&metrics->underline_position);
pango_quantize_line_geometry (&metrics->strikethrough_thickness,
&metrics->strikethrough_position);
/* Quantizing may have pushed underline_position to 0. Not good */
if (metrics->underline_position == 0)
metrics->underline_position = - metrics->underline_thickness;
return metrics;
}
static void
pango_cairo_win32_font_finalize (GObject *object)
{
PangoCairoWin32Font *cwfont = (PangoCairoWin32Font *) object;
_pango_cairo_font_private_finalize (&cwfont->cf_priv);
G_OBJECT_CLASS (pango_cairo_win32_font_parent_class)->finalize (object);
}
static void
pango_cairo_win32_font_get_glyph_extents (PangoFont *font,
PangoGlyph glyph,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect)
{
PangoCairoWin32Font *cwfont = (PangoCairoWin32Font *) font;
_pango_cairo_font_private_get_glyph_extents (&cwfont->cf_priv,
glyph,
ink_rect,
logical_rect);
}
static gboolean
pango_cairo_win32_font_select_font (PangoFont *font,
HDC hdc)
{
cairo_scaled_font_t *scaled_font = _pango_cairo_font_private_get_scaled_font (&PANGO_CAIRO_WIN32_FONT (font)->cf_priv);
return cairo_win32_scaled_font_select_font (scaled_font, hdc) == CAIRO_STATUS_SUCCESS;
}
static void
pango_cairo_win32_font_done_font (PangoFont *font)
{
cairo_scaled_font_t *scaled_font = _pango_cairo_font_private_get_scaled_font (&PANGO_CAIRO_WIN32_FONT (font)->cf_priv);
cairo_win32_scaled_font_done_font (scaled_font);
}
static double
pango_cairo_win32_font_get_metrics_factor (PangoFont *font)
{
PangoWin32Font *win32font = PANGO_WIN32_FONT (font);
cairo_scaled_font_t *scaled_font = _pango_cairo_font_private_get_scaled_font (&PANGO_CAIRO_WIN32_FONT (font)->cf_priv);
return cairo_win32_scaled_font_get_metrics_factor (scaled_font) * win32font->size;
}
static void
pango_cairo_win32_font_class_init (PangoCairoWin32FontClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
PangoFontClass *font_class = PANGO_FONT_CLASS (class);
PangoWin32FontClass *win32_font_class = PANGO_WIN32_FONT_CLASS (class);
object_class->finalize = pango_cairo_win32_font_finalize;
font_class->get_glyph_extents = pango_cairo_win32_font_get_glyph_extents;
font_class->get_metrics = _pango_cairo_font_get_metrics;
win32_font_class->select_font = pango_cairo_win32_font_select_font;
win32_font_class->done_font = pango_cairo_win32_font_done_font;
win32_font_class->get_metrics_factor = pango_cairo_win32_font_get_metrics_factor;
}
static void
pango_cairo_win32_font_init (PangoCairoWin32Font *cwfont G_GNUC_UNUSED)
{
}
/********************
* Private API *
********************/
PangoFont *
_pango_cairo_win32_font_new (PangoCairoWin32FontMap *cwfontmap,
PangoContext *context,
PangoWin32Face *face,
const PangoFontDescription *desc)
{
PangoCairoWin32Font *cwfont;
PangoWin32Font *win32font;
double size;
double dpi;
#define USE_FACE_CACHED_FONTS
#ifdef USE_FACE_CACHED_FONTS
PangoWin32FontMap *win32fontmap;
GSList *tmp_list;
#endif
cairo_matrix_t font_matrix;
g_return_val_if_fail (PANGO_IS_CAIRO_WIN32_FONT_MAP (cwfontmap), NULL);
size = (double) pango_font_description_get_size (desc) / PANGO_SCALE;
if (context)
{
dpi = pango_cairo_context_get_resolution (context);
if (dpi <= 0)
dpi = cwfontmap->dpi;
}
else
dpi = cwfontmap->dpi;
if (!pango_font_description_get_size_is_absolute (desc))
size *= dpi / 72.;
#ifdef USE_FACE_CACHED_FONTS
win32fontmap = PANGO_WIN32_FONT_MAP (cwfontmap);
tmp_list = face->cached_fonts;
while (tmp_list)
{
win32font = tmp_list->data;
if (ABS (win32font->size - size * PANGO_SCALE) < 2)
{
g_object_ref (win32font);
if (win32font->in_cache)
_pango_win32_fontmap_cache_remove (PANGO_FONT_MAP (win32fontmap), win32font);
return PANGO_FONT (win32font);
}
tmp_list = tmp_list->next;
}
#endif
cwfont = g_object_new (PANGO_TYPE_CAIRO_WIN32_FONT, NULL);
win32font = PANGO_WIN32_FONT (cwfont);
g_assert (win32font->fontmap == NULL);
win32font->fontmap = (PangoFontMap *) cwfontmap;
g_object_add_weak_pointer (G_OBJECT (win32font->fontmap), (gpointer *) (gpointer) &win32font->fontmap);
win32font->win32face = face;
#ifdef USE_FACE_CACHED_FONTS
face->cached_fonts = g_slist_prepend (face->cached_fonts, win32font);
#endif
/* FIXME: This is a pixel size, so not really what we want for describe(),
* but it's what we need when computing the scale factor.
*/
win32font->size = size * PANGO_SCALE;
_pango_win32_make_matching_logfontw (win32font->fontmap,
&face->logfontw,
win32font->size,
&win32font->logfontw);
cairo_matrix_init_identity (&font_matrix);
cairo_matrix_scale (&font_matrix, size, size);
_pango_cairo_font_private_initialize (&cwfont->cf_priv,
(PangoCairoFont *) cwfont,
pango_font_description_get_gravity (desc),
_pango_cairo_context_get_merged_font_options (context),
pango_context_get_matrix (context),
&font_matrix);
return PANGO_FONT (cwfont);
}
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