0f613ea134
By using a new signal, ::create-surface (width, height), it should be possible for third party code and sub-classes to override the default surface creation code in CairoSurface. This commit takes a bit of the patch from: http://bugzilla.clutter-project.org/show_bug.cgi?id=1878 which cleans up CairoTexture; the idea, mutuated from that bug, is that the CairoTexture actor checks whether the surface it has it's an image one, and in that case it uses a Cogl texture as the backing store. In case the surface is not an image one we assume that the surface itself has some way of updating the GL state and flush the surface.
112 lines
4.5 KiB
C
112 lines
4.5 KiB
C
/*
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* Clutter
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By: Emmanuele Bassi <ebassi@linux.intel.com>
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* Matthew Allum <mallum@o-hand.com>
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* Chris Lord <chris@o-hand.com>
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* Iain Holmes <iain@o-hand.com>
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* Neil Roberts <neil@linux.intel.com>
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*
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* Copyright (C) 2008, 2009, 2010 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <clutter/clutter.h> can be included directly."
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#endif
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#ifndef __CLUTTER_CAIRO_TEXTURE_H__
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#define __CLUTTER_CAIRO_TEXTURE_H__
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#include <clutter/clutter-texture.h>
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#include <cairo.h>
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_CAIRO_TEXTURE (clutter_cairo_texture_get_type ())
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#define CLUTTER_CAIRO_TEXTURE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_CAIRO_TEXTURE, ClutterCairoTexture))
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#define CLUTTER_CAIRO_TEXTURE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_CAIRO_TEXTURE, ClutterCairoTextureClass))
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#define CLUTTER_IS_CAIRO_TEXTURE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_CAIRO_TEXTURE))
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#define CLUTTER_IS_CAIRO_TEXTURE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_CAIRO_TEXTURE))
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#define CLUTTER_CAIRO_TEXTURE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_CAIRO_TEXTURE, ClutterCairoTextureClass))
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typedef struct _ClutterCairoTexture ClutterCairoTexture;
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typedef struct _ClutterCairoTextureClass ClutterCairoTextureClass;
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typedef struct _ClutterCairoTexturePrivate ClutterCairoTexturePrivate;
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/**
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* ClutterCairoTexture:
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*
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* The #ClutterCairoTexture struct contains only private data.
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*
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* Since: 1.0
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*/
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struct _ClutterCairoTexture
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{
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/*< private >*/
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ClutterTexture parent_instance;
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ClutterCairoTexturePrivate *priv;
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};
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/**
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* ClutterCairoTextureClass:
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*
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* The #ClutterCairoTextureClass struct contains only private data.
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*
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* Since: 1.0
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*/
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struct _ClutterCairoTextureClass
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{
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/*< private >*/
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ClutterTextureClass parent_class;
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/*< public >*/
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cairo_surface_t *(* create_surface) (ClutterCairoTexture *texture,
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guint width,
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guint height);
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/*< private >*/
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void (*_clutter_cairo_2) (void);
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void (*_clutter_cairo_3) (void);
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void (*_clutter_cairo_4) (void);
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};
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GType clutter_cairo_texture_get_type (void) G_GNUC_CONST;
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ClutterActor *clutter_cairo_texture_new (guint width,
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guint height);
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cairo_t * clutter_cairo_texture_create_region (ClutterCairoTexture *self,
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gint x_offset,
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gint y_offset,
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gint width,
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gint height);
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cairo_t * clutter_cairo_texture_create (ClutterCairoTexture *self);
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void clutter_cairo_texture_set_surface_size (ClutterCairoTexture *self,
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guint width,
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guint height);
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void clutter_cairo_texture_get_surface_size (ClutterCairoTexture *self,
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guint *width,
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guint *height);
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void clutter_cairo_texture_clear (ClutterCairoTexture *self);
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void clutter_cairo_set_source_color (cairo_t *cr,
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const ClutterColor *color);
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G_END_DECLS
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#endif /* __CLUTTER_CAIRO_TEXTURE_H__ */
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