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1000c80444
We had several different ways of exposing experimental API, in one case the symbols had no special suffix, in two other ways the symbols were given an _EXP suffix but in different ways. This makes all experimental API have an _EXP suffix which is handled using #defines in the header so the prototypes in the .c and .h files don't have the suffix. The documented reason for the suffix is so that anyone watching Cogl for ABI changes who sees symbols disappear will hopefully understand what's going on.
257 lines
6.8 KiB
C
257 lines
6.8 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
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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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* Authors:
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* Damien Lespiau <damien.lespiau@intel.com>
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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_BUFFER_H__
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#define __COGL_BUFFER_H__
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#include <glib.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-buffer
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* @short_description: Buffer creation and manipulation
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* @stability: Unstable
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*
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* COGL allows the creation and the manipulation of buffers. If the underlying
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* OpenGL implementation allows it, COGL will use Pixel Buffer Objects.
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*/
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/* All of the cogl-buffer API is currently experimental so we suffix
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* the actual symbols with _EXP so if somone is monitoring for ABI
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* changes it will hopefully be clearer to them what's going on if any
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* of the symbols dissapear at a later date.
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*/
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#define cogl_is_buffer cogl_is_buffer_EXP
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#define cogl_buffer_get_size cogl_buffer_get_size_EXP
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#define cogl_buffer_set_usage_hint cogl_buffer_set_usage_hint_EXP
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#define cogl_buffer_get_usage_hint cogl_buffer_get_usage_hint_EXP
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#define cogl_buffer_set_update_hint cogl_buffer_set_update_hint_EXP
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#define cogl_buffer_get_update_hint cogl_buffer_get_update_hint_EXP
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#define cogl_buffer_map cogl_buffer_map_EXP
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#define cogl_buffer_unmap cogl_buffer_unmap_EXP
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#define cogl_buffer_set_data cogl_buffer_set_data_EXP
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typedef struct _CoglBuffer CoglBuffer;
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/**
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* cogl_is_buffer:
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* @buffer: a buffer object
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*
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* Checks whether @buffer is a buffer object.
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*
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* Return value: %TRUE if the handle is a CoglBuffer, and %FALSE otherwise
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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gboolean
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cogl_is_buffer (const void *object);
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/**
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* cogl_buffer_get_size:
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* @buffer: a buffer object
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*
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* Retrieves the size of buffer
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*
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* Return value: the size of the buffer in bytes
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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unsigned int
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cogl_buffer_get_size (CoglBuffer *buffer);
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/**
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* CoglBufferUsageHint:
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* @COGL_BUFFER_USAGE_HINT_TEXTURE: the buffer will be used as a source data
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* for a texture
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*
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* The usage hint on a buffer allows the user to give some clue on how the
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* buffer will be used.
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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typedef enum { /*< prefix=COGL_BUFFER_USAGE_HINT >*/
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COGL_BUFFER_USAGE_HINT_TEXTURE,
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} CoglBufferUsageHint;
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/**
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* cogl_buffer_set_usage_hint:
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* @buffer: a buffer object
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* @hint: the new hint
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*
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* Sets the usage hint on a buffer. See #CoglBufferUsageHint for a description
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* of the available hints.
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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void
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cogl_buffer_set_usage_hint (CoglBuffer *buffer,
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CoglBufferUsageHint hint);
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/**
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* cogl_buffer_get_usage_hint:
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* @buffer: a buffer object
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*
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* Retrieves the usage hint set using cogl_buffer_set_usage_hint()
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*
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* Return value: the #CoglBufferUsageHint currently used by the buffer
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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CoglBufferUsageHint
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cogl_buffer_get_usage_hint (CoglBuffer *buffer);
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/**
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* CoglBufferUpdateHint:
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* @COGL_BUFFER_UPDATE_HINT_STATIC: the buffer will not change over time
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* @COGL_BUFFER_UPDATE_HINT_DYNAMIC: the buffer will change from time to time
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* @COGL_BUFFER_UPDATE_HINT_STREAM: the buffer will be used once or a couple of
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* times
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*
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* The update hint on a buffer allows the user to give some detail on how often
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* the buffer data is going to be updated.
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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typedef enum { /*< prefix=COGL_BUFFER_UPDATE_HINT >*/
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COGL_BUFFER_UPDATE_HINT_STATIC,
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COGL_BUFFER_UPDATE_HINT_DYNAMIC,
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COGL_BUFFER_UPDATE_HINT_STREAM
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} CoglBufferUpdateHint;
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/**
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* cogl_buffer_set_update_hint:
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* @buffer: a buffer object
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* @hint: the new hint
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*
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* Sets the update hint on a buffer. See #CoglBufferUpdateHint for a description
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* of the available hints.
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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void
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cogl_buffer_set_update_hint (CoglBuffer *buffer,
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CoglBufferUpdateHint hint);
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/**
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* cogl_buffer_get_update_hint:
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* @buffer: a buffer object
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*
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* Retrieves the update hints set using cogl_buffer_set_update_hint()
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*
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* Return value: the #CoglBufferUpdateHint currently used by the buffer
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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CoglBufferUpdateHint
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cogl_buffer_get_update_hint (CoglBuffer *buffer);
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/**
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* CoglBufferAccess:
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* @COGL_BUFFER_ACCESS_READ: the buffer will be read
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* @COGL_BUFFER_ACCESS_WRITE: the buffer will written to
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* @COGL_BUFFER_ACCESS_READ_WRITE: the buffer will be used for both reading and
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* writing
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*
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* The access hints for cogl_buffer_set_update_hint()
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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typedef enum { /*< prefix=COGL_BUFFER_ACCESS >*/
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COGL_BUFFER_ACCESS_READ = 1 << 0,
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COGL_BUFFER_ACCESS_WRITE = 1 << 1,
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COGL_BUFFER_ACCESS_READ_WRITE = COGL_BUFFER_ACCESS_READ |
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COGL_BUFFER_ACCESS_WRITE
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} CoglBufferAccess;
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/**
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* cogl_buffer_map:
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* @buffer: a buffer object
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* @access: how the mapped buffer will by use by the application
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*
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* Maps the buffer into the application address space for direct access.
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*
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* Return value: A pointer to the mapped memory or %NULL is the call fails
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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guint8 *
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cogl_buffer_map (CoglBuffer *buffer,
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CoglBufferAccess access);
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/**
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* cogl_buffer_unmap:
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* @buffer: a buffer object
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*
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* Unmaps a buffer previously mapped by cogl_buffer_map().
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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void
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cogl_buffer_unmap (CoglBuffer *buffer);
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/**
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* cogl_buffer_set_data:
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* @buffer: a buffer object
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* @offset: destination offset (in bytes) in the buffer
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* @data: a pointer to the data to be copied into the buffer
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* @size: number of bytes to copy
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*
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* Updates part of the buffer with new data from @data. Where to put this new
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* data is controlled by @offset and @offset + @data should be less than the
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* buffer size.
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*
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* Return value: %TRUE is the operation succeeded, %FALSE otherwise
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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gboolean
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cogl_buffer_set_data (CoglBuffer *buffer,
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gsize offset,
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const guint8 *data,
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gsize size);
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G_END_DECLS
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#endif /* __COGL_BUFFER_H__ */
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