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      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
     22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     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    /* Offset for firstLevel image:
     45     */
     46    GLuint textureOffset;
     47 
     48    /* On validation any active images held in main memory or in other
     49     * regions will be copied to this region and the old storage freed.
     50     */
     51    struct intel_mipmap_tree *mt;
     52 };
     53 
     54 
     55 /**
     56  * intel_texture_image is a subclass of swrast_texture_image because we
     57  * sometimes fall back to using the swrast module for software rendering.
     58  */
     59 struct intel_texture_image
     60 {
     61    struct swrast_texture_image base;
     62 
     63    /* If intelImage->mt != NULL, image data is stored here.
     64     * Else if intelImage->base.Buffer != NULL, image is stored there.
     65     * Else there is no image data.
     66     */
     67    struct intel_mipmap_tree *mt;
     68 };
     69 
     70 static INLINE struct intel_texture_object *
     71 intel_texture_object(struct gl_texture_object *obj)
     72 {
     73    return (struct intel_texture_object *) obj;
     74 }
     75 
     76 static INLINE struct intel_texture_image *
     77 intel_texture_image(struct gl_texture_image *img)
     78 {
     79    return (struct intel_texture_image *) img;
     80 }
     81 
     82 #endif /* _INTEL_TEX_OBJ_H */
     83