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eb14da3874
A first step towards abandoning the CoglObject type system: convert CoglFramebuffer, CoglOffscreen and CoglOnscreen into GObjects. CoglFramebuffer is turned into an abstract GObject, while the two others are currently final. The "winsys" and "platform" are still sprinkled 'void *' in the the non-abstract type instances however. https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1496
105 lines
3.6 KiB
C
105 lines
3.6 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2007,2008,2009,2012 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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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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#include <glib-object.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: 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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/* Offscreen api */
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#define COGL_TYPE_OFFSCREEN (cogl_offscreen_get_type ())
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COGL_EXPORT
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G_DECLARE_FINAL_TYPE (CoglOffscreen, cogl_offscreen,
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COGL, OFFSCREEN,
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CoglFramebuffer)
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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 and not with meta-texture types such as
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* #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 #GError 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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COGL_EXPORT CoglOffscreen *
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cogl_offscreen_new_with_texture (CoglTexture *texture);
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/**
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* cogl_offscreen_get_texture: (skip)
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*/
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COGL_EXPORT CoglTexture *
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cogl_offscreen_get_texture (CoglOffscreen *offscreen);
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G_END_DECLS
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#endif /* __COGL_OFFSCREEN_H__ */
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