src/mesa/drivers/dri/i965/intel_tex_obj.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #ifndef _INTEL_TEX_OBJ_H
  29 #define _INTEL_TEX_OBJ_H
  30
  31 #include "swrast/s_context.h"
  32
  33
  34 struct intel_texture_object
  35 {
  36    struct gl_texture_object base;
  37
  38    /* This is a mirror of base._MaxLevel, updated at validate time,
  39     * except that we don't bother with the non-base levels for
  40     * non-mipmapped textures.
  41     */
  42    unsigned int _MaxLevel;
  43
  44    /* On validation any active images held in main memory or in other
  45     * regions will be copied to this region and the old storage freed.
  46     */
  47    struct intel_mipmap_tree *mt;
  48
  49    /**
  50     * Set when mipmap trees in the texture images of this texture object
  51     * might not all be the mipmap tree above.
  52     */
  53    bool needs_validate;
  54 };
  55
  56
  57 /**
  58  * intel_texture_image is a subclass of swrast_texture_image because we
  59  * sometimes fall back to using the swrast module for software rendering.
  60  */
  61 struct intel_texture_image
  62 {
  63    struct swrast_texture_image base;
  64
  65    /* If intelImage->mt != NULL, image data is stored here.
  66     * Else if intelImage->base.Buffer != NULL, image is stored there.
  67     * Else there is no image data.
  68     */
  69    struct intel_mipmap_tree *mt;
  70 };
  71
  72 static INLINE struct intel_texture_object *
  73 intel_texture_object(struct gl_texture_object *obj)
  74 {
  75    return (struct intel_texture_object *) obj;
  76 }
  77
  78 static INLINE struct intel_texture_image *
  79 intel_texture_image(struct gl_texture_image *img)
  80 {
  81    return (struct intel_texture_image *) img;
  82 }
  83
  84 #endif /* _INTEL_TEX_OBJ_H */