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
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   9  * without limitation the rights to use, copy, modify, merge, publish,
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
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  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.
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  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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  26  **************************************************************************/
  27
  28 #ifndef _INTEL_TEX_OBJ_H
  29 #define _INTEL_TEX_OBJ_H
  30
  31 struct intel_texture_object
  32 {
  33    struct gl_texture_object base;       /* The "parent" object */
  34
  35    /* This is a mirror of base._MaxLevel, updated at validate time,
  36     * except that we don't bother with the non-base levels for
  37     * non-mipmapped textures.
  38     */
  39    unsigned int _MaxLevel;
  40
  41    /* Offset for firstLevel image:
  42     */
  43    GLuint textureOffset;
  44
  45    /* On validation any active images held in main memory or in other
  46     * regions will be copied to this region and the old storage freed.
  47     */
  48    struct intel_mipmap_tree *mt;
  49 };
  50
  51 struct intel_texture_image
  52 {
  53    struct gl_texture_image base;
  54
  55    /* If intelImage->mt != NULL, image data is stored here.
  56     * Else if intelImage->base.Data != NULL, image is stored there.
  57     * Else there is no image data.
  58     */
  59    struct intel_mipmap_tree *mt;
  60    GLboolean used_as_render_target;
  61
  62    /**
  63     * \name Renderbuffers for faking packed depth/stencil
  64     *
  65     * These renderbuffers are non-null only if the intel_context is using
  66     * separate stencil and this texture has a packed depth/stencil format. When
  67     * glFramebufferTexture is called on this image, the resultant renderbuffer
  68     * wrapper reuses these renderbuffers as its own.
  69     *
  70     * \see intel_wrap_texture
  71     * \see intel_tex_image_s8z24_create_renderbuffers
  72     * \see intel_tex_image_s8z24_scatter
  73     * \see intel_tex_image_s8z24_gather
  74     *
  75     * \{
  76     */
  77
  78    /**
  79     * The depth buffer has format X8_Z24. The x8 bits are undefined unless
  80     * intel_tex_image_s8z24_gather has been immediately called. The depth buffer
  81     * resuses the image miptree's region and hiz_region as its own.
  82     */
  83    struct gl_renderbuffer *depth_rb;
  84
  85    /**
  86     * The stencil buffer has format S8 and keeps its data in its own region.
  87     */
  88    struct gl_renderbuffer *stencil_rb;
  89
  90    /** \} */
  91 };
  92
  93 static INLINE struct intel_texture_object *
  94 intel_texture_object(struct gl_texture_object *obj)
  95 {
  96    return (struct intel_texture_object *) obj;
  97 }
  98
  99 static INLINE struct intel_texture_image *
 100 intel_texture_image(struct gl_texture_image *img)
 101 {
 102    return (struct intel_texture_image *) img;
 103 }
 104
 105 #endif /* _INTEL_TEX_OBJ_H */