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    /** array indexed by cube face or 3D/array slice, one bit per mipmap level */
  83    ushort *rendered_to;
  84 };
  85
  86
  87
  88 /* Note this is only used for texture (not buffer) transfers:
  89  */
  90 struct svga_transfer
  91 {
  92    struct pipe_transfer base;
  93
  94    unsigned face;
  95
  96    struct svga_winsys_buffer *hwbuf;
  97
  98    /* Height of the hardware buffer in pixel blocks */
  99    unsigned hw_nblocksy;
 100
 101    /* Temporary malloc buffer when we can't allocate a hardware buffer
 102     * big enough */
 103    void *swbuf;
 104 };
 105
 106
 107 static INLINE struct svga_texture *svga_texture( struct pipe_resource *resource )
 108 {
 109    struct svga_texture *tex = (struct svga_texture *)resource;
 110    assert(tex == NULL || tex->b.vtbl == &svga_texture_vtbl);
 111    return tex;
 112 }
 113
 114
 115 static INLINE struct svga_transfer *
 116 svga_transfer(struct pipe_transfer *transfer)
 117 {
 118    assert(transfer);
 119    return (struct svga_transfer *)transfer;
 120 }
 121
 122
 123 /**
 124  * Increment the age of a view into a texture
 125  * This is used to track updates to textures when we draw into
 126  * them via a surface.
 127  */
 128 static INLINE void
 129 svga_age_texture_view(struct svga_texture *tex, unsigned level)
 130 {
 131    assert(level < Elements(tex->view_age));
 132    tex->view_age[level] = ++(tex->age);
 133 }
 134
 135
 136 /**
 137  * Mark the given texture face/level as being defined.
 138  */
 139 static INLINE void
 140 svga_define_texture_level(struct svga_texture *tex,
 141                           unsigned face,unsigned level)
 142 {
 143    assert(face < Elements(tex->defined));
 144    assert(level < Elements(tex->defined[0]));
 145    tex->defined[face][level] = TRUE;
 146 }
 147
 148
 149 static INLINE bool
 150 svga_is_texture_level_defined(const struct svga_texture *tex,
 151                               unsigned face, unsigned level)
 152 {
 153    assert(face < Elements(tex->defined));
 154    assert(level < Elements(tex->defined[0]));
 155    return tex->defined[face][level];
 156 }
 157
 158
 159 /** For debugging, check that face and level are legal */
 160 static inline void
 161 check_face_level(const struct svga_texture *tex,
 162                  unsigned face, unsigned level)
 163 {
 164    if (tex->b.b.target == PIPE_TEXTURE_CUBE) {
 165       assert(face < 6);
 166    }
 167    else if (tex->b.b.target == PIPE_TEXTURE_3D) {
 168       assert(face < tex->b.b.depth0);
 169    }
 170    else {
 171       assert(face < tex->b.b.array_size);
 172    }
 173
 174    assert(level < 8 * sizeof(tex->rendered_to[0]));
 175 }
 176
 177
 178 static INLINE void
 179 svga_set_texture_rendered_to(struct svga_texture *tex,
 180                              unsigned face, unsigned level)
 181 {
 182    check_face_level(tex, face, level);
 183    tex->rendered_to[face] |= 1 << level;
 184 }
 185
 186
 187 static INLINE void
 188 svga_clear_texture_rendered_to(struct svga_texture *tex,
 189                                unsigned face, unsigned level)
 190 {
 191    check_face_level(tex, face, level);
 192    tex->rendered_to[face] &= ~(1 << level);
 193 }
 194
 195
 196 static INLINE boolean
 197 svga_was_texture_rendered_to(const struct svga_texture *tex,
 198                              unsigned face, unsigned level)
 199 {
 200    check_face_level(tex, face, level);
 201    return !!(tex->rendered_to[face] & (1 << level));
 202 }
 203
 204
 205 struct pipe_resource *
 206 svga_texture_create(struct pipe_screen *screen,
 207                     const struct pipe_resource *template);
 208
 209 struct pipe_resource *
 210 svga_texture_from_handle(struct pipe_screen * screen,
 211                         const struct pipe_resource *template,
 212                         struct winsys_handle *whandle);
 213
 214
 215
 216
 217 #endif /* SVGA_TEXTURE_H */