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/**

 * \file texobj.h

 * Texture object management.

 */

/*

 * Mesa 3-D graphics library

 *

 * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR

 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 * OTHER DEALINGS IN THE SOFTWARE.

 */

#ifndef TEXTOBJ_H

#define TEXTOBJ_H

#include "compiler.h"

#include "glheader.h"

#include "mtypes.h"

#include "samplerobj.h"

/**

 * \name Internal functions

 */

/*@{*/

extern struct gl_texture_object *

_mesa_lookup_texture(struct gl_context *ctx, GLuint id);

extern struct gl_texture_object *

_mesa_new_texture_object( struct gl_context *ctx, GLuint name, GLenum target );

extern void

_mesa_initialize_texture_object( struct gl_context *ctx,

                                 struct gl_texture_object *obj,

                                 GLuint name, GLenum target );

extern void

_mesa_delete_texture_object( struct gl_context *ctx,

                             struct gl_texture_object *obj );

extern void

_mesa_copy_texture_object( struct gl_texture_object *dest,

                           const struct gl_texture_object *src );

extern void

_mesa_clear_texture_object(struct gl_context *ctx,

                           struct gl_texture_object *obj);

extern void

_mesa_reference_texobj_(struct gl_texture_object **ptr,

                        struct gl_texture_object *tex);

static inline void

_mesa_reference_texobj(struct gl_texture_object **ptr,

                       struct gl_texture_object *tex)

{

   if (*ptr != tex)

      _mesa_reference_texobj_(ptr, tex);

}

/**

 * Return number of faces for a texture target.  This will be 6 for

 * cube maps (and cube map arrays) and 1 otherwise.

 * NOTE: this function is not used for cube map arrays which operate

 * more like 2D arrays than cube maps.

 */

static inline GLuint

_mesa_num_tex_faces(GLenum target)

{

   switch (target) {

   case GL_TEXTURE_CUBE_MAP:

   case GL_PROXY_TEXTURE_CUBE_MAP:

      return 6;

   default:

      return 1;

   }

}

/** Is the texture "complete" with respect to the given sampler state? */

static inline GLboolean

_mesa_is_texture_complete(const struct gl_texture_object *texObj,

                          const struct gl_sampler_object *sampler)

{

   if (texObj->_IsIntegerFormat &&

       (sampler->MagFilter != GL_NEAREST ||

        (sampler->MinFilter != GL_NEAREST &&

         sampler->MinFilter != GL_NEAREST_MIPMAP_NEAREST))) {

      /* If the format is integer, only nearest filtering is allowed */

      return GL_FALSE;

   }

   if (_mesa_is_mipmap_filter(sampler))

      return texObj->_MipmapComplete;

   else

      return texObj->_BaseComplete;

}

extern void

_mesa_test_texobj_completeness( const struct gl_context *ctx,

                                struct gl_texture_object *obj );

extern GLboolean

_mesa_cube_complete(const struct gl_texture_object *texObj);

extern void

_mesa_dirty_texobj(struct gl_context *ctx, struct gl_texture_object *texObj,

                   GLboolean invalidate_state);

extern struct gl_texture_object *

_mesa_get_fallback_texture(struct gl_context *ctx, gl_texture_index tex);

extern GLuint

_mesa_total_texture_memory(struct gl_context *ctx);

extern void

_mesa_unlock_context_textures( struct gl_context *ctx );

extern void

_mesa_lock_context_textures( struct gl_context *ctx );

/*@}*/

/**

 * \name API functions

 */

/*@{*/

extern void GLAPIENTRY

_mesa_GenTextures( GLsizei n, GLuint *textures );

extern void GLAPIENTRY

_mesa_DeleteTextures( GLsizei n, const GLuint *textures );

extern void GLAPIENTRY

_mesa_BindTexture( GLenum target, GLuint texture );

extern void GLAPIENTRY

_mesa_PrioritizeTextures( GLsizei n, const GLuint *textures,

                          const GLclampf *priorities );

extern GLboolean GLAPIENTRY

_mesa_AreTexturesResident( GLsizei n, const GLuint *textures,

                           GLboolean *residences );

extern GLboolean GLAPIENTRY

_mesa_IsTexture( GLuint texture );

extern void GLAPIENTRY

_mesa_InvalidateTexSubImage(GLuint texture, GLint level, GLint xoffset,

                            GLint yoffset, GLint zoffset, GLsizei width,

                            GLsizei height, GLsizei depth);

extern void GLAPIENTRY

_mesa_InvalidateTexImage(GLuint texture, GLint level);

/*@}*/

#endif