src/gallium/drivers/svga/svga_resource_texture.h

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
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  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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  22  * SOFTWARE.
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  24  **********************************************************/
  25
  26 #ifndef SVGA_TEXTURE_H
  27 #define SVGA_TEXTURE_H
  28
  29
  30 #include "pipe/p_compiler.h"
  31 #include "pipe/p_state.h"
  32 #include "util/u_inlines.h"
  33 #include "util/u_memory.h"
  34 #include "util/u_transfer.h"
  35 #include "svga_screen_cache.h"
  36
  37 struct pipe_context;
  38 struct pipe_screen;
  39 struct svga_context;
  40 struct svga_winsys_surface;
  41 enum SVGA3dSurfaceFormat;
  42
  43
  44 #define SVGA_MAX_TEXTURE_LEVELS 16
  45
  46
  47 extern struct u_resource_vtbl svga_texture_vtbl;
  48
  49
  50 struct svga_texture
  51 {
  52    struct u_resource b;
  53
  54    boolean defined[6][SVGA_MAX_TEXTURE_LEVELS];
  55
  56    struct svga_sampler_view *cached_view;
  57
  58    unsigned view_age[SVGA_MAX_TEXTURE_LEVELS];
  59    unsigned age;
  60
  61    boolean views_modified;
  62
  63    /**
  64     * Creation key for the host surface handle.
  65     *
  66     * This structure describes all the host surface characteristics so that it
  67     * can be looked up in cache, since creating a host surface is often a slow
  68     * operation.
  69     */
  70    struct svga_host_surface_cache_key key;
  71
  72    /**
  73     * Handle for the host side surface.
  74     *
  75     * This handle is owned by this texture. Views should hold on to a reference
  76     * to this texture and never destroy this handle directly.
  77     */
  78    struct svga_winsys_surface *handle;
  79
  80    unsigned size;  /**< Approximate size in bytes */
  81 };
  82
  83
  84
  85 /* Note this is only used for texture (not buffer) transfers:
  86  */
  87 struct svga_transfer
  88 {
  89    struct pipe_transfer base;
  90
  91    unsigned face;
  92
  93    struct svga_winsys_buffer *hwbuf;
  94
  95    /* Height of the hardware buffer in pixel blocks */
  96    unsigned hw_nblocksy;
  97
  98    /* Temporary malloc buffer when we can't allocate a hardware buffer
  99     * big enough */
 100    void *swbuf;
 101 };
 102
 103
 104 static INLINE struct svga_texture *svga_texture( struct pipe_resource *resource )
 105 {
 106    struct svga_texture *tex = (struct svga_texture *)resource;
 107    assert(tex == NULL || tex->b.vtbl == &svga_texture_vtbl);
 108    return tex;
 109 }
 110
 111
 112 static INLINE struct svga_transfer *
 113 svga_transfer(struct pipe_transfer *transfer)
 114 {
 115    assert(transfer);
 116    return (struct svga_transfer *)transfer;
 117 }
 118
 119
 120 /**
 121  * Increment the age of a view into a texture
 122  * This is used to track updates to textures when we draw into
 123  * them via a surface.
 124  */
 125 static INLINE void
 126 svga_age_texture_view(struct svga_texture *tex, unsigned level)
 127 {
 128    assert(level < Elements(tex->view_age));
 129    tex->view_age[level] = ++(tex->age);
 130 }
 131
 132
 133 /**
 134  * Mark the given texture face/level as being defined.
 135  */
 136 static INLINE void
 137 svga_define_texture_level(struct svga_texture *tex,
 138                           unsigned face,unsigned level)
 139 {
 140    assert(face < Elements(tex->defined));
 141    assert(level < Elements(tex->defined[0]));
 142    tex->defined[face][level] = TRUE;
 143 }
 144
 145
 146 struct pipe_resource *
 147 svga_texture_create(struct pipe_screen *screen,
 148                     const struct pipe_resource *template);
 149
 150 struct pipe_resource *
 151 svga_texture_from_handle(struct pipe_screen * screen,
 152                         const struct pipe_resource *template,
 153                         struct winsys_handle *whandle);
 154
 155
 156
 157
 158 #endif /* SVGA_TEXTURE_H */