3a071a4787
It stands to reason that any piece of code using Cairo and Cogl at the same time, and dealing with texture data, will want to use the same logic Clutter uses to determine the compatible pixel format between the two. https://bugzilla.gnome.org/show_bug.cgi?id=647875
135 lines
5.2 KiB
C
135 lines
5.2 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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/**
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* CLUTTER_CAIRO_FORMAT_ARGB32:
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*
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* The #CoglPixelFormat to be used when uploading image data from
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* and to a Cairo image surface using %CAIRO_FORMAT_ARGB32 and
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* %CAIRO_FORMAT_RGB24 as #cairo_format_t.
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*
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* Since: 1.8
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*/
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/* Cairo stores the data in native byte order as ARGB but Cogl's pixel
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* formats specify the actual byte order. Therefore we need to use a
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* different format depending on the architecture
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*/
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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#define CLUTTER_CAIRO_FORMAT_ARGB32 (COGL_PIXEL_FORMAT_BGRA_8888_PRE)
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#else
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#define CLUTTER_CAIRO_FORMAT_ARGB32 (COGL_PIXEL_FORMAT_ARGB_8888_PRE)
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#endif
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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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* @create_surface: class handler for the #ClutterCairoTexture::create-surface
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* signal
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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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