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, see <http://www.gnu.org/licenses/>.
  16  *
  17  * Authors: Benjamin Otte <otte@gnome.org>
  18  */
  19
  20 #ifndef __GTK_CSS_IMAGE_PRIVATE_H__
  21 #define __GTK_CSS_IMAGE_PRIVATE_H__
  22
  23 #include <cairo.h>
  24 #include <glib-object.h>
  25
  26 #include "gtk/gtkstylecontext.h"
  27 #include "gtk/gtkcssparserprivate.h"
  28
  29 G_BEGIN_DECLS
  30
  31 #define GTK_TYPE_CSS_IMAGE           (_gtk_css_image_get_type ())
  32 #define GTK_CSS_IMAGE(obj)           (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_IMAGE, GtkCssImage))
  33 #define GTK_CSS_IMAGE_CLASS(cls)     (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_IMAGE, GtkCssImageClass))
  34 #define GTK_IS_CSS_IMAGE(obj)        (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_IMAGE))
  35 #define GTK_IS_CSS_IMAGE_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_IMAGE))
  36 #define GTK_CSS_IMAGE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_IMAGE, GtkCssImageClass))
  37
  38 typedef struct _GtkCssImage           GtkCssImage;
  39 typedef struct _GtkCssImageClass      GtkCssImageClass;
  40
  41 struct _GtkCssImage
  42 {
  43   GObject parent;
  44 };
  45
  46 struct _GtkCssImageClass
  47 {
  48   GObjectClass parent_class;
  49
  50   /* width of image or 0 if it has no width (optional) */
  51   int          (* get_width)                       (GtkCssImage        *image);
  52   /* height of image or 0 if it has no height (optional) */
  53   int          (* get_height)                      (GtkCssImage        *image);
  54   /* aspect ratio (width / height) of image or 0 if it has no aspect ratio (optional) */
  55   double       (* get_aspect_ratio)                (GtkCssImage        *image);
  56
  57   /* create "computed value" in CSS terms, returns a new reference */
  58   GtkCssImage *(* compute)                         (GtkCssImage        *image,
  59                                                     GtkStyleContext    *context);
  60
  61   /* draw to 0,0 with the given width and height */
  62   void         (* draw)                            (GtkCssImage        *image,
  63                                                     cairo_t            *cr,
  64                                                     double              width,
  65                                                     double              height);
  66   /* parse CSS, return TRUE on success */
  67   gboolean     (* parse)                           (GtkCssImage        *image,
  68                                                     GtkCssParser       *parser,
  69                                                     GFile              *base);
  70   /* print to CSS */
  71   void         (* print)                           (GtkCssImage        *image,
  72                                                     GString            *string);
  73 };
  74
  75 GType          _gtk_css_image_get_type             (void) G_GNUC_CONST;
  76
  77 gboolean       _gtk_css_image_can_parse            (GtkCssParser       *parser);
  78 GtkCssImage *  _gtk_css_image_new_parse            (GtkCssParser       *parser,
  79                                                     GFile              *base);
  80
  81 int            _gtk_css_image_get_width            (GtkCssImage        *image);
  82 int            _gtk_css_image_get_height           (GtkCssImage        *image);
  83 double         _gtk_css_image_get_aspect_ratio     (GtkCssImage        *image);
  84
  85 GtkCssImage *  _gtk_css_image_compute              (GtkCssImage        *image,
  86                                                     GtkStyleContext    *context);
  87
  88 void           _gtk_css_image_draw                 (GtkCssImage        *image,
  89                                                     cairo_t            *cr,
  90                                                     double              width,
  91                                                     double              height);
  92 void           _gtk_css_image_print                (GtkCssImage        *image,
  93                                                     GString            *string);
  94
  95 void           _gtk_css_image_get_concrete_size    (GtkCssImage        *image,
  96                                                     double              specified_width,
  97                                                     double              specified_height,
  98                                                     double              default_width,
  99                                                     double              default_height,
 100                                                     double             *concrete_width,
 101                                                     double             *concrete_height);
 102 cairo_surface_t *
 103                _gtk_css_image_get_surface          (GtkCssImage        *image,
 104                                                     cairo_surface_t    *target,
 105                                                     int                 surface_width,
 106                                                     int                 surface_height);
 107
 108 G_END_DECLS
 109
 110 #endif /* __GTK_CSS_IMAGE_PRIVATE_H__ */