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97 lines
3.0 KiB
C
97 lines
3.0 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#if !defined(__COGL_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <cogl/cogl.h> can be included directly."
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#endif
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#ifndef __COGL_OFFSCREEN_H__
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#define __COGL_OFFSCREEN_H__
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#include <cogl/cogl-types.h>
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G_BEGIN_DECLS
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/**
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* SECTION:cogl-offscreen
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* @short_description: Fuctions for creating and manipulating offscreen
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* frame buffer objects
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*
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* Cogl allows creating and operating on offscreen render targets.
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*/
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/* Offscreen api */
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/**
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* cogl_offscreen_new_to_texture:
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* @handle: A CoglHandle for a Cogl texture
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*
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* This creates an offscreen buffer object using the given texture as the
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* primary color buffer. It doesn't just initialize the contents of the
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* offscreen buffer with the texture; they are tightly bound so that
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* drawing to the offscreen buffer effectivly updates the contents of the
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* given texture. You don't need to destroy the offscreen buffer before
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* you can use the texture again.
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*
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* Note: This does not work with sliced Cogl textures.
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*
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* Returns: a #CoglHandle for the new offscreen buffer or %COGL_INVALID_HANDLE
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* if it wasn't possible to create the buffer.
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*/
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CoglHandle cogl_offscreen_new_to_texture (CoglHandle handle);
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/**
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* cogl_offscreen_ref:
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* @handle: A CoglHandle for an offscreen buffer
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*
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* Increments the reference count on the offscreen buffer.
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*
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* Returns: For convenience it returns the given CoglHandle
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*/
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CoglHandle cogl_offscreen_ref (CoglHandle handle);
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/**
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* cogl_is_offscreen:
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* @handle: A CoglHandle for an offscreen buffer
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*
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* Gets whether the given handle references an existing offscreen buffer
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* object.
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*
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* Returns: %TRUE if the handle references an offscreen buffer,
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* %FALSE otherwise
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*/
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gboolean cogl_is_offscreen (CoglHandle handle);
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/**
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* cogl_offscreen_unref:
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* @handle: A CoglHandle for an offscreen buffer
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*
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* Decreases the reference count for the offscreen buffer and frees it when
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* the count reaches 0.
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*/
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void cogl_offscreen_unref (CoglHandle handle);
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G_END_DECLS
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#endif /* __COGL_OFFSCREEN_H__ */
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