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mutter-performance-source/cogl/cogl-texture-2d-sliced-private.h
Neil Roberts ccc3068ffd cogl-bitmap: Encapsulate the CoglBitmap even internally
The CoglBitmap struct is now only defined within cogl-bitmap.c so that
all of its members can now only be accessed with accessor
functions. To get to the data pointer for the bitmap image you must
first call _cogl_bitmap_map and later call _cogl_bitmap_unmap. The map
function takes the same arguments as cogl_pixel_array_map so that
eventually we can make a bitmap optionally internally divert to a
pixel array.

There is a _cogl_bitmap_new_from_data function which constructs a new
bitmap object and takes ownership of the data pointer. The function
gets passed a destroy callback which gets called when the bitmap is
freed. This is similar to how gdk_pixbuf_new_from_data
works. Alternatively NULL can be passed for the destroy function which
means that the caller will manage the life of the pointer (but must
guarantee that it stays alive at least until the bitmap is
freed). This mechanism is used instead of the old approach of creating
a CoglBitmap struct on the stack and manually filling in the
members. It could also later be used to create a CoglBitmap that owns
a GdkPixbuf ref so that we don't necessarily have to copy the
GdkPixbuf data when converting to a bitmap.

There is also _cogl_bitmap_new_shared. This creates a bitmap using a
reference to another CoglBitmap for the data. This is a bit of a hack
but it is needed by the atlas texture backend which wants to divert
the set_region virtual to another texture but it needs to override the
format of the bitmap to ignore the premult flag.
2010-07-15 17:24:01 +01:00

89 lines
3.1 KiB
C

/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009 Intel Corporation.
*
* 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_TEXTURE_2D_SLICED_H
#define __COGL_TEXTURE_2D_SLICED_H
#include "cogl-bitmap-private.h"
#include "cogl-handle.h"
#include "cogl-material-private.h"
#include "cogl-texture-private.h"
#define COGL_TEXTURE_2D_SLICED(tex) ((CoglTexture2DSliced *)tex)
typedef struct _CoglTexture2DSliced CoglTexture2DSliced;
struct _CoglTexture2DSliced
{
CoglTexture _parent;
GArray *slice_x_spans;
GArray *slice_y_spans;
GArray *slice_gl_handles;
int max_waste;
/* The internal format of the GL texture represented as a
CoglPixelFormat */
CoglPixelFormat format;
/* The internal format of the GL texture represented as a GL enum */
GLenum gl_format;
GLenum gl_target;
int width;
int height;
GLenum min_filter;
GLenum mag_filter;
gboolean is_foreign;
GLenum wrap_mode_s;
GLenum wrap_mode_t;
gboolean auto_mipmap;
gboolean mipmaps_dirty;
/* This holds a copy of the first pixel in each slice. It is only
used to force an automatic update of the mipmaps when
glGenerateMipmap is not available. */
CoglTexturePixel *first_pixels;
};
GQuark
_cogl_handle_texture_2d_sliced_get_type (void);
CoglHandle
_cogl_texture_2d_sliced_new_with_size (unsigned int width,
unsigned int height,
CoglTextureFlags flags,
CoglPixelFormat internal_format);
CoglHandle
_cogl_texture_2d_sliced_new_from_foreign (GLuint gl_handle,
GLenum gl_target,
GLuint width,
GLuint height,
GLuint x_pot_waste,
GLuint y_pot_waste,
CoglPixelFormat format);
CoglHandle
_cogl_texture_2d_sliced_new_from_bitmap (CoglBitmap *bmp,
CoglTextureFlags flags,
CoglPixelFormat internal_format);
#endif /* __COGL_TEXTURE_2D_SLICED_H */