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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  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  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    unsigned int validated_first_level;
  45    unsigned int validated_last_level;
  46
  47    /* On validation any active images held in main memory or in other
  48     * regions will be copied to this region and the old storage freed.
  49     */
  50    struct intel_mipmap_tree *mt;
  51
  52    /**
  53     * Set when mipmap trees in the texture images of this texture object
  54     * might not all be the mipmap tree above.
  55     */
  56    bool needs_validate;
  57 };
  58
  59
  60 /**
  61  * intel_texture_image is a subclass of swrast_texture_image because we
  62  * sometimes fall back to using the swrast module for software rendering.
  63  */
  64 struct intel_texture_image
  65 {
  66    struct swrast_texture_image base;
  67
  68    /* If intelImage->mt != NULL, image data is stored here.
  69     * Else if intelImage->base.Buffer != NULL, image is stored there.
  70     * Else there is no image data.
  71     */
  72    struct intel_mipmap_tree *mt;
  73 };
  74
  75 static INLINE struct intel_texture_object *
  76 intel_texture_object(struct gl_texture_object *obj)
  77 {
  78    return (struct intel_texture_object *) obj;
  79 }
  80
  81 static INLINE struct intel_texture_image *
  82 intel_texture_image(struct gl_texture_image *img)
  83 {
  84    return (struct intel_texture_image *) img;
  85 }
  86
  87 #endif /* _INTEL_TEX_OBJ_H */