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
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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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  22  * SOFTWARE.
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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    /** array indexed by cube face or 3D/array slice, one bit per mipmap level.
  92     *  Set if the level is marked as dirty.
  93     */
  94    ushort *dirty;
  95 };
  96
  97
  98
  99 /* Note this is only used for texture (not buffer) transfers:
 100  */
 101 struct svga_transfer
 102 {
 103    struct pipe_transfer base;
 104
 105    unsigned slice;  /**< array slice or cube face */
 106
 107    struct svga_winsys_buffer *hwbuf;
 108
 109    /* Height of the hardware buffer in pixel blocks */
 110    unsigned hw_nblocksy;
 111
 112    /* Temporary malloc buffer when we can't allocate a hardware buffer
 113     * big enough */
 114    void *swbuf;
 115
 116    boolean use_direct_map;
 117 };
 118
 119
 120 static inline struct svga_texture *svga_texture( struct pipe_resource *resource )
 121 {
 122    struct svga_texture *tex = (struct svga_texture *)resource;
 123    assert(tex == NULL || tex->b.vtbl == &svga_texture_vtbl);
 124    return tex;
 125 }
 126
 127
 128 static inline struct svga_transfer *
 129 svga_transfer(struct pipe_transfer *transfer)
 130 {
 131    assert(transfer);
 132    return (struct svga_transfer *)transfer;
 133 }
 134
 135
 136 /**
 137  * Increment the age of a view into a texture
 138  * This is used to track updates to textures when we draw into
 139  * them via a surface.
 140  */
 141 static inline void
 142 svga_age_texture_view(struct svga_texture *tex, unsigned level)
 143 {
 144    assert(level < ARRAY_SIZE(tex->view_age));
 145    tex->view_age[level] = ++(tex->age);
 146 }
 147
 148
 149 /** For debugging, check that face and level are legal */
 150 static inline void
 151 check_face_level(const struct svga_texture *tex,
 152                  unsigned face, unsigned level)
 153 {
 154    if (tex->b.b.target == PIPE_TEXTURE_CUBE) {
 155       assert(face < 6);
 156    }
 157    else if (tex->b.b.target == PIPE_TEXTURE_3D) {
 158       assert(face < tex->b.b.depth0);
 159    }
 160    else {
 161       assert(face < tex->b.b.array_size);
 162    }
 163
 164    assert(level < 8 * sizeof(tex->rendered_to[0]));
 165 }
 166
 167
 168 /**
 169  * Mark the given texture face/level as being defined.
 170  */
 171 static inline void
 172 svga_define_texture_level(struct svga_texture *tex,
 173                           unsigned face,unsigned level)
 174 {
 175    check_face_level(tex, face, level);
 176    tex->defined[face] |= 1 << level;
 177 }
 178
 179
 180 static inline bool
 181 svga_is_texture_level_defined(const struct svga_texture *tex,
 182                               unsigned face, unsigned level)
 183 {
 184    check_face_level(tex, face, level);
 185    return (tex->defined[face] & (1 << level)) != 0;
 186 }
 187
 188
 189 static inline void
 190 svga_set_texture_rendered_to(struct svga_texture *tex,
 191                              unsigned face, unsigned level)
 192 {
 193    check_face_level(tex, face, level);
 194    tex->rendered_to[face] |= 1 << level;
 195 }
 196
 197
 198 static inline void
 199 svga_clear_texture_rendered_to(struct svga_texture *tex,
 200                                unsigned face, unsigned level)
 201 {
 202    check_face_level(tex, face, level);
 203    tex->rendered_to[face] &= ~(1 << level);
 204 }
 205
 206
 207 static inline boolean
 208 svga_was_texture_rendered_to(const struct svga_texture *tex,
 209                              unsigned face, unsigned level)
 210 {
 211    check_face_level(tex, face, level);
 212    return !!(tex->rendered_to[face] & (1 << level));
 213 }
 214
 215 static inline void
 216 svga_set_texture_dirty(struct svga_texture *tex,
 217                        unsigned face, unsigned level)
 218 {
 219    check_face_level(tex, face, level);
 220    tex->dirty[face] |= 1 << level;
 221 }
 222
 223 static inline void
 224 svga_clear_texture_dirty(struct svga_texture *tex)
 225 {
 226    unsigned i;
 227    for (i = 0; i < tex->b.b.depth0 * tex->b.b.array_size; i++) {
 228       tex->dirty[i] = 0;
 229    }
 230 }
 231
 232 static inline boolean
 233 svga_is_texture_dirty(const struct svga_texture *tex,
 234                       unsigned face, unsigned level)
 235 {
 236    check_face_level(tex, face, level);
 237    return !!(tex->dirty[face] & (1 << level));
 238 }
 239
 240 struct pipe_resource *
 241 svga_texture_create(struct pipe_screen *screen,
 242                     const struct pipe_resource *template);
 243
 244 struct pipe_resource *
 245 svga_texture_from_handle(struct pipe_screen * screen,
 246                         const struct pipe_resource *template,
 247                         struct winsys_handle *whandle);
 248
 249 boolean
 250 svga_texture_generate_mipmap(struct pipe_context *pipe,
 251                              struct pipe_resource *pt,
 252                              enum pipe_format format,
 253                              unsigned base_level,
 254                              unsigned last_level,
 255                              unsigned first_layer,
 256                              unsigned last_layer);
 257
 258
 259 #endif /* SVGA_TEXTURE_H */