132 lines
4.1 KiB
C
132 lines
4.1 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) 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 License
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* 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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* Authors:
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* Robert Bragg <robert@linux.intel.com>
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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_ATTRIBUTE_BUFFER_H__
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#define __COGL_ATTRIBUTE_BUFFER_H__
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/* We forward declare the CoglAttributeBuffer type here to avoid some circular
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* dependency issues with the following headers.
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*/
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typedef struct _CoglAttributeBuffer CoglAttributeBuffer;
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#include <cogl/cogl-context.h>
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COGL_BEGIN_DECLS
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/**
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* SECTION:cogl-attribute-buffer
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* @short_description: Functions for creating and manipulating attribute
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* buffers
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*
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* FIXME
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*/
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#define COGL_ATTRIBUTE_BUFFER(buffer) ((CoglAttributeBuffer *)(buffer))
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/**
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* cogl_attribute_buffer_new_with_size:
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* @context: A #CoglContext
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* @bytes: The number of bytes to allocate for vertex attribute data.
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*
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* Describes a new #CoglAttributeBuffer of @size bytes to contain
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* arrays of vertex attribute data. Afterwards data can be set using
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* cogl_buffer_set_data() or by mapping it into the application's
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* address space using cogl_buffer_map().
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*
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* The underlying storage of this buffer isn't allocated by this
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* function so that you have an opportunity to use the
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* cogl_buffer_set_update_hint() and cogl_buffer_set_usage_hint()
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* functions which may influence how the storage is allocated. The
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* storage will be allocated once you upload data to the buffer.
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*
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* Note: You can assume this function always succeeds and won't return
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* %NULL
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*
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* Return value: (transfer full): A newly allocated #CoglAttributeBuffer. Never %NULL.
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*
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* Stability: Unstable
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*/
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CoglAttributeBuffer *
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cogl_attribute_buffer_new_with_size (CoglContext *context,
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size_t bytes);
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/**
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* cogl_attribute_buffer_new:
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* @context: A #CoglContext
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* @bytes: The number of bytes to allocate for vertex attribute data.
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* @data: (array length=bytes): An optional pointer to vertex data to
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* upload immediately.
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*
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* Describes a new #CoglAttributeBuffer of @size bytes to contain
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* arrays of vertex attribute data and also uploads @size bytes read
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* from @data to the new buffer.
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*
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* You should never pass a %NULL data pointer.
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*
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* <note>This function does not report out-of-memory errors back to
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* the caller by returning %NULL and so you can assume this function
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* always succeeds.</note>
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*
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* <note>In the unlikely case that there is an out of memory problem
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* then Cogl will abort the application with a message. If your
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* application needs to gracefully handle out-of-memory errors then
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* you can use cogl_attribute_buffer_new_with_size() and then
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* explicitly catch errors with cogl_buffer_set_data() or
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* cogl_buffer_map().</note>
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*
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* Return value: (transfer full): A newly allocated #CoglAttributeBuffer (never %NULL)
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*
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* Since: 1.4
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* Stability: Unstable
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*/
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CoglAttributeBuffer *
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cogl_attribute_buffer_new (CoglContext *context,
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size_t bytes,
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const void *data);
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/**
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* cogl_is_attribute_buffer:
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* @object: A #CoglObject
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*
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* Gets whether the given object references a #CoglAttributeBuffer.
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*
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* Returns: %TRUE if @object references a #CoglAttributeBuffer,
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* %FALSE otherwise
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*
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* Since: 1.4
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* Stability: Unstable
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*/
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CoglBool
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cogl_is_attribute_buffer (void *object);
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COGL_END_DECLS
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#endif /* __COGL_ATTRIBUTE_BUFFER_H__ */
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