mirror of
https://github.com/brl/mutter.git
synced 2024-11-23 00:20:42 -05:00
d18b59d9e6
This creates a CoglBitmap which points into an existing buffer in system memory. That way it can be used to create a texture or to read pixel data into. The function replaces the existing internal function _cogl_bitmap_new_from_data but removes the destroy notify call back. If the application wants notification of destruction it can just use the cogl_object_set_user_data function as normal. Internally there is now a convenience function to create a bitmap for system memory and automatically free the buffer using that mechanism. The name of the function is inspired by cairo_image_surface_create_for_data which has similar semantics. Reviewed-by: Robert Bragg <robert@linux.intel.com>
146 lines
4.7 KiB
C
146 lines
4.7 KiB
C
/*
|
|
* 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);
|
|
|
|
#endif /* __COGL_BITMAP_H */
|