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,
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   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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  13  * included in all copies or substantial portions of the Software.
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  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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  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    ushort *defined;
  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    /**
  81     * Whether the host side surface is imported and not created by this
  82     * driver.
  83     */
  84    boolean imported;
  85
  86    unsigned size;  /**< Approximate size in bytes */
  87
  88    /** array indexed by cube face or 3D/array slice, one bit per mipmap level */
  89    ushort *rendered_to;
  90 };
  91
  92
  93
  94 /* Note this is only used for texture (not buffer) transfers:
  95  */
  96 struct svga_transfer
  97 {
  98    struct pipe_transfer base;
  99
 100    unsigned slice;  /**< array slice or cube face */
 101
 102    struct svga_winsys_buffer *hwbuf;
 103
 104    /* Height of the hardware buffer in pixel blocks */
 105    unsigned hw_nblocksy;
 106
 107    /* Temporary malloc buffer when we can't allocate a hardware buffer
 108     * big enough */
 109    void *swbuf;
 110
 111    boolean use_direct_map;
 112 };
 113
 114
 115 static inline struct svga_texture *svga_texture( struct pipe_resource *resource )
 116 {
 117    struct svga_texture *tex = (struct svga_texture *)resource;
 118    assert(tex == NULL || tex->b.vtbl == &svga_texture_vtbl);
 119    return tex;
 120 }
 121
 122
 123 static inline struct svga_transfer *
 124 svga_transfer(struct pipe_transfer *transfer)
 125 {
 126    assert(transfer);
 127    return (struct svga_transfer *)transfer;
 128 }
 129
 130
 131 /**
 132  * Increment the age of a view into a texture
 133  * This is used to track updates to textures when we draw into
 134  * them via a surface.
 135  */
 136 static inline void
 137 svga_age_texture_view(struct svga_texture *tex, unsigned level)
 138 {
 139    assert(level < Elements(tex->view_age));
 140    tex->view_age[level] = ++(tex->age);
 141 }
 142
 143
 144 /** For debugging, check that face and level are legal */
 145 static inline void
 146 check_face_level(const struct svga_texture *tex,
 147                  unsigned face, unsigned level)
 148 {
 149    if (tex->b.b.target == PIPE_TEXTURE_CUBE) {
 150       assert(face < 6);
 151    }
 152    else if (tex->b.b.target == PIPE_TEXTURE_3D) {
 153       assert(face < tex->b.b.depth0);
 154    }
 155    else {
 156       assert(face < tex->b.b.array_size);
 157    }
 158
 159    assert(level < 8 * sizeof(tex->rendered_to[0]));
 160 }
 161
 162
 163 /**
 164  * Mark the given texture face/level as being defined.
 165  */
 166 static inline void
 167 svga_define_texture_level(struct svga_texture *tex,
 168                           unsigned face,unsigned level)
 169 {
 170    check_face_level(tex, face, level);
 171    tex->defined[face] |= 1 << level;
 172 }
 173
 174
 175 static inline bool
 176 svga_is_texture_level_defined(const struct svga_texture *tex,
 177                               unsigned face, unsigned level)
 178 {
 179    check_face_level(tex, face, level);
 180    return (tex->defined[face] & (1 << level)) != 0;
 181 }
 182
 183
 184 static inline void
 185 svga_set_texture_rendered_to(struct svga_texture *tex,
 186                              unsigned face, unsigned level)
 187 {
 188    check_face_level(tex, face, level);
 189    tex->rendered_to[face] |= 1 << level;
 190 }
 191
 192
 193 static inline void
 194 svga_clear_texture_rendered_to(struct svga_texture *tex,
 195                                unsigned face, unsigned level)
 196 {
 197    check_face_level(tex, face, level);
 198    tex->rendered_to[face] &= ~(1 << level);
 199 }
 200
 201
 202 static inline boolean
 203 svga_was_texture_rendered_to(const struct svga_texture *tex,
 204                              unsigned face, unsigned level)
 205 {
 206    check_face_level(tex, face, level);
 207    return !!(tex->rendered_to[face] & (1 << level));
 208 }
 209
 210
 211 struct pipe_resource *
 212 svga_texture_create(struct pipe_screen *screen,
 213                     const struct pipe_resource *template);
 214
 215 struct pipe_resource *
 216 svga_texture_from_handle(struct pipe_screen * screen,
 217                         const struct pipe_resource *template,
 218                         struct winsys_handle *whandle);
 219
 220
 221
 222
 223 #endif /* SVGA_TEXTURE_H */