mutter/cogl/cogl-texture-private.h
Neil Roberts 1df0e36c6c cogl: Use a vtable for the texture backends instead of a type and switch
Instead of storing an enum with the backend type for each texture and
then using a switch statement to decide which function to call, we
should store pointers to all of the functions in a struct and have
each texture point to that struct. This is potentially slightly faster
when there are more backends and it makes implementing new backends
easier because it's more obvious which functions have to be
implemented.
2009-11-25 13:47:28 +00:00

178 lines
6.0 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __COGL_TEXTURE_PRIVATE_H
#define __COGL_TEXTURE_PRIVATE_H
#include "cogl-bitmap-private.h"
#include "cogl-handle.h"
#include "cogl-material-private.h"
#define COGL_TEXTURE(tex) ((CoglTexture *)(tex))
typedef struct _CoglTexture CoglTexture;
typedef struct _CoglTextureVtable CoglTextureVtable;
typedef void (*CoglTextureSliceCallback) (CoglHandle handle,
GLuint gl_handle,
GLenum gl_target,
float *slice_coords,
float *virtual_coords,
void *user_data);
struct _CoglTextureVtable
{
/* Virtual functions that must be implemented for a texture
backend */
gboolean (* set_region) (CoglTexture *tex,
int src_x,
int src_y,
int dst_x,
int dst_y,
unsigned int dst_width,
unsigned int dst_height,
int width,
int height,
CoglPixelFormat format,
unsigned int rowstride,
const guint8 *data);
int (* get_data) (CoglTexture *tex,
CoglPixelFormat format,
unsigned int rowstride,
guint8 *data);
void (* foreach_sub_texture_in_region) (CoglTexture *tex,
float virtual_tx_1,
float virtual_ty_1,
float virtual_tx_2,
float virtual_ty_2,
CoglTextureSliceCallback callback,
void *user_data);
gint (* get_max_waste) (CoglTexture *tex);
gboolean (* is_sliced) (CoglTexture *tex);
gboolean (* can_hardware_repeat) (CoglTexture *tex);
void (* transform_coords_to_gl) (CoglTexture *tex,
float *s,
float *t);
gboolean (* get_gl_texture) (CoglTexture *tex,
GLuint *out_gl_handle,
GLenum *out_gl_target);
void (* set_filters) (CoglTexture *tex,
GLenum min_filter,
GLenum mag_filter);
void (* ensure_mipmaps) (CoglTexture *tex);
void (* set_wrap_mode_parameter) (CoglTexture *tex,
GLenum wrap_mode);
};
struct _CoglTexture
{
CoglHandleObject _parent;
const CoglTextureVtable *vtable;
CoglBitmap bitmap;
gboolean bitmap_owner;
GLenum gl_target;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
GLenum min_filter;
GLenum mag_filter;
gboolean is_foreign;
GLint wrap_mode;
gboolean auto_mipmap;
gboolean mipmaps_dirty;
};
void
_cogl_texture_foreach_sub_texture_in_region (CoglHandle handle,
float virtual_tx_1,
float virtual_ty_1,
float virtual_tx_2,
float virtual_ty_2,
CoglTextureSliceCallback callback,
void *user_data);
gboolean
_cogl_texture_can_hardware_repeat (CoglHandle handle);
void
_cogl_texture_transform_coords_to_gl (CoglHandle handle,
float *s,
float *t);
GLenum
_cogl_texture_get_internal_gl_format (CoglHandle handle);
void
_cogl_texture_set_wrap_mode_parameter (CoglHandle handle,
GLenum wrap_mode);
void
_cogl_texture_set_filters (CoglHandle handle,
GLenum min_filter,
GLenum mag_filter);
void
_cogl_texture_ensure_mipmaps (CoglHandle handle);
/* Functions currently only used by CoglTexture implementations or
* drivers... */
void
_cogl_texture_free (CoglTexture *tex);
void
_cogl_texture_bitmap_free (CoglTexture *tex);
void
_cogl_texture_bitmap_swap (CoglTexture *tex,
CoglBitmap *new_bitmap);
gboolean
_cogl_texture_bitmap_prepare (CoglTexture *tex,
CoglPixelFormat internal_format);
void
_cogl_texture_prep_gl_alignment_for_pixels_upload (int pixels_rowstride);
void
_cogl_texture_prep_gl_alignment_for_pixels_download (int pixels_rowstride);
gboolean
_cogl_texture_draw_and_read (CoglTexture *tex,
CoglBitmap *target_bmp,
GLuint target_gl_format,
GLuint target_gl_type);
#endif /* __COGL_TEXTURE_PRIVATE_H */