/*
 * 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;
typedef struct _CoglTexturePixel  CoglTexturePixel;

/* This is used to store the first pixel of each slice. This is only
   used when glGenerateMipmap is not available */
struct _CoglTexturePixel
{
  /* We need to store the format of the pixel because we store the
     data in the source format which might end up being different for
     each slice if a subregion is updated with a different format */
  GLenum gl_format;
  GLenum gl_type;
  guint8 data[4];
};

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;
  GLint             wrap_mode;
  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 (CoglHandle       bmp_handle,
                                         CoglTextureFlags flags,
                                         CoglPixelFormat  internal_format);

#endif /* __COGL_TEXTURE_2D_SLICED_H */