Pileus Git - ~andy/gtk/blob - gtk/gtkcssimageprivate.h

   1 /*
   2  * Copyright © 2011 Red Hat Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  *
  18  * Authors: Benjamin Otte <otte@gnome.org>
  19  */
  20
  21 #ifndef __GTK_CSS_IMAGE_PRIVATE_H__
  22 #define __GTK_CSS_IMAGE_PRIVATE_H__
  23
  24 #include <cairo.h>
  25 #include <glib-object.h>
  26
  27 #include "gtk/gtkstylecontext.h"
  28 #include "gtk/gtkcssparserprivate.h"
  29
  30 G_BEGIN_DECLS
  31
  32 #define GTK_TYPE_CSS_IMAGE           (_gtk_css_image_get_type ())
  33 #define GTK_CSS_IMAGE(obj)           (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_IMAGE, GtkCssImage))
  34 #define GTK_CSS_IMAGE_CLASS(cls)     (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_IMAGE, GtkCssImageClass))
  35 #define GTK_IS_CSS_IMAGE(obj)        (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_IMAGE))
  36 #define GTK_IS_CSS_IMAGE_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_IMAGE))
  37 #define GTK_CSS_IMAGE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_IMAGE, GtkCssImageClass))
  38
  39 typedef struct _GtkCssImage           GtkCssImage;
  40 typedef struct _GtkCssImageClass      GtkCssImageClass;
  41
  42 struct _GtkCssImage
  43 {
  44   GObject parent;
  45 };
  46
  47 struct _GtkCssImageClass
  48 {
  49   GObjectClass parent_class;
  50
  51   /* width of image or 0 if it has no width (optional) */
  52   int          (* get_width)                       (GtkCssImage        *image);
  53   /* height of image or 0 if it has no height (optional) */
  54   int          (* get_height)                      (GtkCssImage        *image);
  55   /* aspect ratio (width / height) of image or 0 if it has no aspect ratio (optional) */
  56   double       (* get_aspect_ratio)                (GtkCssImage        *image);
  57
  58   /* create "computed value" in CSS terms, returns a new reference */
  59   GtkCssImage *(* compute)                         (GtkCssImage        *image,
  60                                                     GtkStyleContext    *context);
  61
  62   /* draw to 0,0 with the given width and height */
  63   void         (* draw)                            (GtkCssImage        *image,
  64                                                     cairo_t            *cr,
  65                                                     double              width,
  66                                                     double              height);
  67   /* parse CSS, return TRUE on success */
  68   gboolean     (* parse)                           (GtkCssImage        *image,
  69                                                     GtkCssParser       *parser,
  70                                                     GFile              *base);
  71   /* print to CSS */
  72   void         (* print)                           (GtkCssImage        *image,
  73                                                     GString            *string);
  74 };
  75
  76 GType          _gtk_css_image_get_type             (void) G_GNUC_CONST;
  77
  78 gboolean       _gtk_css_image_can_parse            (GtkCssParser       *parser);
  79 GtkCssImage *  _gtk_css_image_new_parse            (GtkCssParser       *parser,
  80                                                     GFile              *base);
  81
  82 int            _gtk_css_image_get_width            (GtkCssImage        *image);
  83 int            _gtk_css_image_get_height           (GtkCssImage        *image);
  84 double         _gtk_css_image_get_aspect_ratio     (GtkCssImage        *image);
  85
  86 GtkCssImage *  _gtk_css_image_compute              (GtkCssImage        *image,
  87                                                     GtkStyleContext    *context);
  88
  89 void           _gtk_css_image_draw                 (GtkCssImage        *image,
  90                                                     cairo_t            *cr,
  91                                                     double              width,
  92                                                     double              height);
  93 void           _gtk_css_image_print                (GtkCssImage        *image,
  94                                                     GString            *string);
  95
  96 void           _gtk_css_image_get_concrete_size    (GtkCssImage        *image,
  97                                                     double              specified_width,
  98                                                     double              specified_height,
  99                                                     double              default_width,
 100                                                     double              default_height,
 101                                                     double             *concrete_width,
 102                                                     double             *concrete_height);
 103 cairo_surface_t *
 104                _gtk_css_image_get_surface          (GtkCssImage        *image,
 105                                                     cairo_surface_t    *target,
 106                                                     int                 surface_width,
 107                                                     int                 surface_height);
 108
 109 G_END_DECLS
 110
 111 #endif /* __GTK_CSS_IMAGE_PRIVATE_H__ */