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/*
* Clutter COGL
*
* A basic GL/GLES Abstraction/Utility Layer
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2007 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*
*/
#ifndef __COGL_BITMAP_H
#define __COGL_BITMAP_H
#include <glib.h>
#include "cogl-handle.h"
#include "cogl-buffer.h"
#include "cogl-bitmap.h"
/*
* _cogl_bitmap_new_with_malloc_buffer:
* @context: A #CoglContext
* @width: width of the bitmap in pixels
* @height: height of the bitmap in pixels
* @format: the format of the pixels the array will store
*
* This is equivalent to cogl_bitmap_new_with_size() except that it
* allocated the buffer using g_malloc() instead of creating a
* #CoglPixelBuffer. The buffer will be automatically destroyed when
* the bitmap is freed.
*
* Return value: a #CoglPixelBuffer representing the newly created array
*
* Since: 1.10
* Stability: Unstable
*/
CoglBitmap *
_cogl_bitmap_new_with_malloc_buffer (CoglContext *context,
unsigned int width,
unsigned int height,
CoglPixelFormat format);
/* The idea of this function is that it will create a bitmap that
shares the actual data with another bitmap. This is needed for the
atlas texture backend because it needs upload a bitmap to a sub
texture but override the format so that it ignores the premult
flag. */
CoglBitmap *
_cogl_bitmap_new_shared (CoglBitmap *shared_bmp,
CoglPixelFormat format,
int width,
int height,
int rowstride);
CoglBitmap *
_cogl_bitmap_convert (CoglBitmap *bmp,
CoglPixelFormat dst_format);
gboolean
_cogl_bitmap_convert_into_bitmap (CoglBitmap *src_bmp,
CoglBitmap *dst_bmp);
CoglBitmap *
_cogl_bitmap_from_file (const char *filename,
GError **error);
gboolean
_cogl_bitmap_unpremult (CoglBitmap *dst_bmp);
gboolean
_cogl_bitmap_premult (CoglBitmap *dst_bmp);
gboolean
_cogl_bitmap_convert_premult_status (CoglBitmap *bmp,
CoglPixelFormat dst_format);
gboolean
_cogl_bitmap_copy_subregion (CoglBitmap *src,
CoglBitmap *dst,
int src_x,
int src_y,
int dst_x,
int dst_y,
int width,
int height);
/* Creates a deep copy of the source bitmap */
CoglBitmap *
_cogl_bitmap_copy (CoglBitmap *src_bmp);
gboolean
_cogl_bitmap_get_size_from_file (const char *filename,
int *width,
int *height);
void
_cogl_bitmap_set_format (CoglBitmap *bitmap,
CoglPixelFormat format);
/* Maps the bitmap so that the pixels can be accessed directly or if
the bitmap is just a memory bitmap then it just returns the pointer
to memory. Note that the bitmap isn't guaranteed to allocated to
the full size of rowstride*height so it is not safe to read up to
the rowstride of the last row. This will be the case if the user
uploads data using gdk_pixbuf_new_subpixbuf with a sub region
containing the last row of the pixbuf because in that case the
rowstride can be much larger than the width of the image */
guint8 *
_cogl_bitmap_map (CoglBitmap *bitmap,
CoglBufferAccess access,
CoglBufferMapHint hints);
void
_cogl_bitmap_unmap (CoglBitmap *bitmap);
/* These two are replacements for map and unmap that should used when
the pointer is going to be passed to GL for pixel packing or
unpacking. The address might not be valid for reading if the bitmap
was created with new_from_buffer but it will however be good to
pass to glTexImage2D for example. The access should be READ for
unpacking and WRITE for packing. It can not be both */
guint8 *
_cogl_bitmap_bind (CoglBitmap *bitmap,
CoglBufferAccess access,
CoglBufferMapHint hints);
void
_cogl_bitmap_unbind (CoglBitmap *bitmap);
CoglContext *
_cogl_bitmap_get_context (CoglBitmap *bitmap);
#endif /* __COGL_BITMAP_H */
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