9440c690fb
The deprecation macros need to be before the function prototype on Visual Studio, and is also accepted by GCC. Reviewed-by: Neil Roberts <neil@linux.intel.com>
152 lines
5.1 KiB
C
152 lines
5.1 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) 2007,2008,2009,2012 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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*
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*/
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#if !defined(__COGL_H_INSIDE__) && !defined(COGL_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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#include <cogl/cogl-texture.h>
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COGL_BEGIN_DECLS
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/**
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* SECTION:cogl-offscreen
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* @short_description: Functions for creating and manipulating offscreen
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* framebuffers.
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*
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* Cogl allows creating and operating on offscreen framebuffers.
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*/
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typedef struct _CoglOffscreen CoglOffscreen;
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#define COGL_OFFSCREEN(X) ((CoglOffscreen *)X)
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/* Offscreen api */
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/**
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* cogl_offscreen_new_with_texture:
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* @texture: A #CoglTexture pointer
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*
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* This creates an offscreen framebuffer object using the given
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* @texture as the primary color buffer. It doesn't just initialize
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* the contents of the offscreen buffer with the @texture; they are
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* tightly bound so that drawing to the offscreen buffer effectively
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* updates the contents of the given texture. You don't need to
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* destroy the offscreen buffer before you can use the @texture again.
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*
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* <note>This api only works with low-level #CoglTexture types such as
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* #CoglTexture2D, #CoglTexture3D and #CoglTextureRectangle, and not
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* with meta-texture types such as #CoglTexture2DSliced.</note>
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*
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* The storage for the framebuffer is actually allocated lazily
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* so this function will never return %NULL to indicate a runtime
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* error. This means it is still possible to configure the framebuffer
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* before it is really allocated.
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*
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* Simple applications without full error handling can simply rely on
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* Cogl to lazily allocate the storage of framebuffers but you should
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* be aware that if Cogl encounters an error (such as running out of
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* GPU memory) then your application will simply abort with an error
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* message. If you need to be able to catch such exceptions at runtime
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* then you can explicitly allocate your framebuffer when you have
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* finished configuring it by calling cogl_framebuffer_allocate() and
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* passing in a #CoglError argument to catch any exceptions.
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*
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* Return value: (transfer full): a newly instantiated #CoglOffscreen
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* framebuffer.
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*/
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CoglOffscreen *
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cogl_offscreen_new_with_texture (CoglTexture *texture);
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/**
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* cogl_offscreen_new_to_texture:
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* @texture: A #CoglTexture pointer
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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 only works with low-level #CoglTexture types such as
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* #CoglTexture2D, #CoglTexture3D and #CoglTextureRectangle, and not
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* with meta-texture types such as #CoglTexture2DSliced.</note>
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*
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* Return value: (transfer full): a newly instantiated #CoglOffscreen
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* framebuffer or %NULL if it wasn't possible to create the
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* buffer.
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* Deprecated: 1.16: Use cogl_offscreen_new_with_texture instead.
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_offscreen_new_with_texture)
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CoglOffscreen *
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cogl_offscreen_new_to_texture (CoglTexture *texture);
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/**
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* cogl_is_offscreen:
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* @object: A pointer to a #CoglObject
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*
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* Determines whether the given #CoglObject references an offscreen
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* framebuffer object.
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*
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* Returns: %TRUE if @object is a #CoglOffscreen framebuffer,
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* %FALSE otherwise
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*/
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CoglBool
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cogl_is_offscreen (void *object);
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/**
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* cogl_offscreen_ref:
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* @offscreen: A pointer to a #CoglOffscreen framebuffer
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*
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* Increments the reference count on the @offscreen framebuffer.
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*
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* Return value: (transfer none): For convenience it returns the
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* given @offscreen
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*
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* Deprecated: 1.2: cogl_object_ref() should be used in new code.
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*/
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COGL_DEPRECATED_FOR (cogl_object_ref)
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void *
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cogl_offscreen_ref (void *offscreen);
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/**
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* cogl_offscreen_unref:
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* @offscreen: A pointer to a #CoglOffscreen framebuffer
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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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* Deprecated: 1.2: cogl_object_unref() should be used in new code.
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*/
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COGL_DEPRECATED_FOR (cogl_object_unref)
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void
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cogl_offscreen_unref (void *offscreen);
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COGL_END_DECLS
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#endif /* __COGL_OFFSCREEN_H__ */
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