0f5f4e8645
We've had complaints that our Cogl code/headers are a bit "special" so
this is a first pass at tidying things up by giving them some
consistency. These changes are all consistent with how new code in Cogl
is being written, but the style isn't consistently applied across all
code yet.
There are two parts to this patch; but since each one required a large
amount of effort to maintain tidy indenting it made sense to combine the
changes to reduce the time spent re indenting the same lines.
The first change is to use a consistent style for declaring function
prototypes in headers. Cogl headers now consistently use this style for
prototypes:
return_type
cogl_function_name (CoglType arg0,
CoglType arg1);
Not everyone likes this style, but it seems that most of the currently
active Cogl developers agree on it.
The second change is to constrain the use of redundant glib data types
in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all
been replaced with int, unsigned int, float, long, unsigned long and char
respectively. When talking about pixel data; use of guchar has been
replaced with guint8, otherwise unsigned char can be used.
The glib types that we continue to use for portability are gboolean,
gint{8,16,32,64}, guint{8,16,32,64} and gsize.
The general intention is that Cogl should look palatable to the widest
range of C programmers including those outside the Gnome community so
- especially for the public API - we want to minimize the number of
foreign looking typedefs.
166 lines
5.5 KiB
C
166 lines
5.5 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) 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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* 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(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_PIXEL_BUFFER_H__
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#define __COGL_PIXEL_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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* cogl_pixel_buffer_new:
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* @size: size of the buffer in bytes
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*
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* Creates a new buffer to store pixel data. You can create a new texture from
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* this buffer using cogl_texture_new_from_buffer().
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*
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* Return value: a #CoglHandle representing the newly created buffer or
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* %COGL_INVALID_HANDLE on failure
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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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CoglHandle
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cogl_pixel_buffer_new (unsigned int size);
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/**
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* cogl_pixel_buffer_new_for_size:
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* @width: width of the pixel buffer in pixels
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* @height: height of the pixel buffer in pixels
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* @format: the format of the pixels the buffer will store
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* @stride: if not %NULL the function will return the stride of the buffer
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* in bytes
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*
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* Creates a new buffer to store pixel data.
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*
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* <note>COGL will try its best to provide a hardware buffer you can map,
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* write into and effectively do a zero copy upload when creating a texture
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* from it with cogl_texture_new_from_buffer(). For various reasons, such
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* buffers are likely to have a stride larger than width * bytes_per_pixel. The
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* user must take the stride into account when writing into it.</note>
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*
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* Return value: a #CoglHandle representing the newly created buffer or
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* %COGL_INVALID_HANDLE on failure
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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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CoglHandle
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cogl_pixel_buffer_new_for_size (unsigned int width,
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unsigned int height,
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CoglPixelFormat format,
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unsigned int *stride);
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/**
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* cogl_is_pixel_buffer:
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* @handle: a #CoglHandle to test
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*
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* Checks whether @handle is a pixel buffer.
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*
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* Return value: %TRUE if the @handle is a pixel buffer, and %FALSE
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* 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_pixel_buffer (CoglHandle handle);
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/*
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* cogl_pixel_buffer_set_region:
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* @buffer: the #CoglHandle of a pixel buffer
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* @data: pixel data to upload to @buffer
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* @src_width: width in pixels of the region to update
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* @src_height: height in pixels of the region to update
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* @src_rowstride: row stride in bytes of the source buffer
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* @dst_x: upper left destination horizontal coordinate
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* @dst_y: upper left destination vertical coordinate
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*
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* Uploads new data into a pixel buffer. The source data pointed by @data can
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* have a different stride than @buffer in which case the function will do the
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* right thing for you. For performance reasons, it is recommended for the
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* source data to have the same stride than @buffer.
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*
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* Return value: %TRUE if the upload 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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#if 0
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gboolean
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cogl_pixel_buffer_set_region (CoglHandle buffer,
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guint8 *data,
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unsigned int src_width,
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unsigned int src_height,
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unsigned int src_rowstride,
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unsigned int dst_x,
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unsigned int dst_y);
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#endif
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/* the functions above are experimental, the actual symbols are suffixed by
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* _EXP so we can ensure ABI compatibility and leave the cogl_buffer namespace
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* free for future use. A bunch of defines translates the symbols documented
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* above into the real symbols */
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CoglHandle
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cogl_pixel_buffer_new_EXP (unsigned int size);
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CoglHandle
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cogl_pixel_buffer_new_for_size_EXP (unsigned int width,
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unsigned int height,
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CoglPixelFormat format,
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unsigned int *stride);
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gboolean
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cogl_is_pixel_buffer_EXP (CoglHandle handle);
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#if 0
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gboolean
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cogl_pixel_buffer_set_region_EXP (CoglHandle buffer,
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guint8 *data,
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unsigned int src_width,
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unsigned int src_height,
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unsigned int src_rowstride,
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unsigned int dst_x,
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unsigned int dst_y);
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#endif
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#define cogl_pixel_buffer_new cogl_pixel_buffer_new_EXP
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#define cogl_pixel_buffer_new_for_size cogl_pixel_buffer_new_for_size_EXP
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#define cogl_is_pixel_buffer cogl_is_pixel_buffer_EXP
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#if 0
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#define cogl_pixel_buffer_set_region cogl_pixel_buffer_set_region_EXP
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#endif
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G_END_DECLS
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#endif /* __COGL_PIXEL_BUFFER_H__ */
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