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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2008 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:cogl-pango
* @short_description: COGL-based text rendering using Pango
*
* FIXME
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* This is needed to get the Pango headers to export stuff needed to
subclass */
#ifndef PANGO_ENABLE_BACKEND
#define PANGO_ENABLE_BACKEND 1
#endif
#include <pango/pango-fontmap.h>
#include <pango/pangocairo.h>
#include <pango/pango-renderer.h>
#include "cogl-pango.h"
#include "cogl-pango-private.h"
static GQuark cogl_pango_font_map_get_renderer_key (void) G_GNUC_CONST;
/**
* cogl_pango_font_map_new:
*
* Creates a new font map.
*
* Return value: the newly created #PangoFontMap
*
* Since: 1.0
*/
PangoFontMap *
cogl_pango_font_map_new (void)
{
return pango_cairo_font_map_new ();
}
/**
* cogl_pango_font_map_create_context:
* @fm: a #CoglPangoFontMap
*
* Creates a new #PangoContext from the passed font map.
*
* Return value: the newly created #PangoContext
*
* Since: 1.0
*/
PangoContext *
cogl_pango_font_map_create_context (CoglPangoFontMap *fm)
{
g_return_val_if_fail (COGL_PANGO_IS_FONT_MAP (fm), NULL);
/* We can just directly use the pango context from the Cairo font
map */
return pango_cairo_font_map_create_context (PANGO_CAIRO_FONT_MAP (fm));
}
/**
* cogl_pango_font_map_get_renderer:
* @fm: a #CoglPangoFontMap
*
* Retrieves the #CoglPangoRenderer for the passed font map.
*
* Return value: a #PangoRenderer
*
* Since: 1.0
*/
PangoRenderer *
cogl_pango_font_map_get_renderer (CoglPangoFontMap *fm)
{
PangoRenderer *renderer;
g_return_val_if_fail (COGL_PANGO_IS_FONT_MAP (fm), NULL);
/* We want to keep a cached pointer to the renderer from the font
map instance but as we don't have a proper subclass we have to
store it in the object data instead */
renderer = g_object_get_qdata (G_OBJECT (fm),
cogl_pango_font_map_get_renderer_key ());
if (G_UNLIKELY (renderer == NULL))
{
renderer = g_object_new (COGL_PANGO_TYPE_RENDERER, NULL);
g_object_set_qdata_full (G_OBJECT (fm),
cogl_pango_font_map_get_renderer_key (),
renderer,
g_object_unref);
}
return renderer;
}
/**
* cogl_pango_font_map_set_resolution:
* @font_map: a #CoglPangoFontMap
* @dpi: DPI to set
*
* Sets the resolution to be used by @font_map at @dpi.
*
* Since: 1.0
*/
void
cogl_pango_font_map_set_resolution (CoglPangoFontMap *font_map,
double dpi)
{
g_return_if_fail (COGL_PANGO_IS_FONT_MAP (font_map));
pango_cairo_font_map_set_resolution (PANGO_CAIRO_FONT_MAP (font_map), dpi);
}
/**
* cogl_pango_font_map_clear_glyph_cache:
* @fm: a #CoglPangoFontMap
*
* Clears the glyph cache for @fm.
*
* Since: 1.0
*/
void
cogl_pango_font_map_clear_glyph_cache (CoglPangoFontMap *fm)
{
PangoRenderer *renderer;
renderer = cogl_pango_font_map_get_renderer (fm);
_cogl_pango_renderer_clear_glyph_cache (COGL_PANGO_RENDERER (renderer));
}
/**
* cogl_pango_font_map_set_use_mipmapping:
* @fm: a #CoglPangoFontMap
* @value: %TRUE to enable the use of mipmapping
*
* Sets whether the renderer for the passed font map should use
* mipmapping when rendering a #PangoLayout.
*
* Since: 1.0
*/
void
cogl_pango_font_map_set_use_mipmapping (CoglPangoFontMap *fm,
gboolean value)
{
CoglPangoRenderer *renderer;
renderer = COGL_PANGO_RENDERER (cogl_pango_font_map_get_renderer (fm));
_cogl_pango_renderer_set_use_mipmapping (renderer, value);
}
/**
* cogl_pango_font_map_get_use_mipmapping:
* @fm: a #CoglPangoFontMap
*
* Retrieves whether the #CoglPangoRenderer used by @fm will
* use mipmapping when rendering the glyphs.
*
* Return value: %TRUE if mipmapping is used, %FALSE otherwise.
*
* Since: 1.0
*/
gboolean
cogl_pango_font_map_get_use_mipmapping (CoglPangoFontMap *fm)
{
CoglPangoRenderer *renderer;
renderer = COGL_PANGO_RENDERER (cogl_pango_font_map_get_renderer (fm));
return _cogl_pango_renderer_get_use_mipmapping (renderer);
}
static GQuark
cogl_pango_font_map_get_renderer_key (void)
{
static GQuark renderer_key = 0;
if (G_UNLIKELY (renderer_key == 0))
renderer_key = g_quark_from_static_string ("CoglPangoFontMap");
return renderer_key;
}
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