src/mesa/drivers/dri/intel/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.
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  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.Data != NULL, image is stored there.
  65     * Else there is no image data.
  66     */
  67    struct intel_mipmap_tree *mt;
  68    bool used_as_render_target;
  69
  70    /**
  71     * \name Renderbuffers for faking packed depth/stencil
  72     *
  73     * These renderbuffers are non-null only if the intel_context is using
  74     * separate stencil and this texture has a packed depth/stencil format. When
  75     * glFramebufferTexture is called on this image, the resultant renderbuffer
  76     * wrapper reuses these renderbuffers as its own.
  77     *
  78     * \see intel_wrap_texture
  79     * \see intel_tex_image_s8z24_create_renderbuffers
  80     * \see intel_tex_image_s8z24_scatter
  81     * \see intel_tex_image_s8z24_gather
  82     *
  83     * \{
  84     */
  85
  86    /**
  87     * The depth buffer has format X8_Z24. The x8 bits are undefined unless
  88     * intel_tex_image_s8z24_gather has been immediately called. The depth buffer
  89     * resuses the image miptree's region and hiz_region as its own.
  90     */
  91    struct gl_renderbuffer *depth_rb;
  92
  93    /**
  94     * The stencil buffer has format S8 and keeps its data in its own region.
  95     */
  96    struct gl_renderbuffer *stencil_rb;
  97
  98    /** \} */
  99 };
 100
 101 static INLINE struct intel_texture_object *
 102 intel_texture_object(struct gl_texture_object *obj)
 103 {
 104    return (struct intel_texture_object *) obj;
 105 }
 106
 107 static INLINE struct intel_texture_image *
 108 intel_texture_image(struct gl_texture_image *img)
 109 {
 110    return (struct intel_texture_image *) img;
 111 }
 112
 113 #endif /* _INTEL_TEX_OBJ_H */