src/mesa/drivers/dri/intel/intel_mipmap_tree.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 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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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  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.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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  26  **************************************************************************/
  27
  28 #ifndef INTEL_MIPMAP_TREE_H
  29 #define INTEL_MIPMAP_TREE_H
  30
  31 #include <assert.h>
  32
  33 #include "intel_regions.h"
  34 #include "intel_resolve_map.h"
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 /* A layer on top of the intel_regions code which adds:
  41  *
  42  * - Code to size and layout a region to hold a set of mipmaps.
  43  * - Query to determine if a new image fits in an existing tree.
  44  * - More refcounting
  45  *     - maybe able to remove refcounting from intel_region?
  46  * - ?
  47  *
  48  * The fixed mipmap layout of intel hardware where one offset
  49  * specifies the position of all images in a mipmap hierachy
  50  * complicates the implementation of GL texture image commands,
  51  * compared to hardware where each image is specified with an
  52  * independent offset.
  53  *
  54  * In an ideal world, each texture object would be associated with a
  55  * single bufmgr buffer or 2d intel_region, and all the images within
  56  * the texture object would slot into the tree as they arrive.  The
  57  * reality can be a little messier, as images can arrive from the user
  58  * with sizes that don't fit in the existing tree, or in an order
  59  * where the tree layout cannot be guessed immediately.
  60  *
  61  * This structure encodes an idealized mipmap tree.  The GL image
  62  * commands build these where possible, otherwise store the images in
  63  * temporary system buffers.
  64  */
  65
  66 struct intel_resolve_map;
  67 struct intel_texture_image;
  68
  69 struct intel_miptree_map {
  70    /** Bitfield of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT, GL_MAP_INVALIDATE_BIT */
  71    GLbitfield mode;
  72    /** Region of interest for the map. */
  73    int x, y, w, h;
  74    /** Possibly malloced temporary buffer for the mapping. */
  75    void *buffer;
  76    /** Possible pointer to a BO temporary for the mapping. */
  77    drm_intel_bo *bo;
  78    /** Pointer to the start of (map_x, map_y) returned by the mapping. */
  79    void *ptr;
  80    /** Stride of the mapping. */
  81    int stride;
  82 };
  83
  84 /**
  85  * Describes the location of each texture image within a texture region.
  86  */
  87 struct intel_mipmap_level
  88 {
  89    /** Offset to this miptree level, used in computing x_offset. */
  90    GLuint level_x;
  91    /** Offset to this miptree level, used in computing y_offset. */
  92    GLuint level_y;
  93    GLuint width;
  94    GLuint height;
  95
  96    /**
  97     * \brief Number of 2D slices in this miplevel.
  98     *
  99     * The exact semantics of depth varies according to the texture target:
 100     *    - For GL_TEXTURE_CUBE_MAP, depth is 6.
 101     *    - For GL_TEXTURE_2D_ARRAY, depth is the number of array slices. It is
 102     *      identical for all miplevels in the texture.
 103     *    - For GL_TEXTURE_3D, it is the texture's depth at this miplevel. Its
 104     *      value, like width and height, varies with miplevel.
 105     *    - For other texture types, depth is 1.
 106     */
 107    GLuint depth;
 108
 109    /**
 110     * \brief List of 2D images in this mipmap level.
 111     *
 112     * This may be a list of cube faces, array slices in 2D array texture, or
 113     * layers in a 3D texture. The list's length is \c depth.
 114     */
 115    struct intel_mipmap_slice {
 116       /**
 117        * \name Offset to slice
 118        * \{
 119        *
 120        * Hardware formats are so diverse that that there is no unified way to
 121        * compute the slice offsets, so we store them in this table.
 122        *
 123        * The (x, y) offset to slice \c s at level \c l relative the miptrees
 124        * base address is
 125        * \code
 126        *     x = mt->level[l].slice[s].x_offset
 127        *     y = mt->level[l].slice[s].y_offset
 128        */
 129       GLuint x_offset;
 130       GLuint y_offset;
 131       /** \} */
 132
 133       /**
 134        * Pointer to mapping information, present across
 135        * intel_tex_image_map()/unmap of the slice.
 136        */
 137       struct intel_miptree_map *map;
 138    } *slice;
 139 };
 140
 141 struct intel_mipmap_tree
 142 {
 143    /* Effectively the key:
 144     */
 145    GLenum target;
 146
 147    /**
 148     * Generally, this is just the same as the gl_texture_image->TexFormat or
 149     * gl_renderbuffer->Format.
 150     *
 151     * However, for textures and renderbuffers with packed depth/stencil formats
 152     * on hardware where we want or need to use separate stencil, there will be
 153     * two miptrees for storing the data.  If the depthstencil texture or rb is
 154     * MESA_FORMAT_Z32_FLOAT_X24S8, then mt->format will be
 155     * MESA_FORMAT_Z32_FLOAT, otherwise for MESA_FORMAT_S8_Z24 objects it will be
 156     * MESA_FORMAT_X8_Z24.
 157     */
 158    gl_format format;
 159
 160    /**
 161     * The X offset of each image in the miptree must be aligned to this. See
 162     * the "Alignment Unit Size" section of the BSpec.
 163     */
 164    unsigned int align_w;
 165    unsigned int align_h; /**< \see align_w */
 166
 167    GLuint first_level;
 168    GLuint last_level;
 169
 170    GLuint width0, height0, depth0; /**< Level zero image dimensions */
 171    GLuint cpp;
 172    bool compressed;
 173
 174    /* Derived from the above:
 175     */
 176    GLuint total_width;
 177    GLuint total_height;
 178
 179    /* Includes image offset tables:
 180     */
 181    struct intel_mipmap_level level[MAX_TEXTURE_LEVELS];
 182
 183    /* The data is held here:
 184     */
 185    struct intel_region *region;
 186
 187    /**
 188     * \brief HiZ miptree
 189     *
 190     * This is non-null only if HiZ is enabled for this miptree.
 191     *
 192     * \see intel_miptree_alloc_hiz()
 193     */
 194    struct intel_mipmap_tree *hiz_mt;
 195
 196    /**
 197     * \brief Map of miptree slices to needed resolves.
 198     *
 199     * This is used only when the miptree has a child HiZ miptree.
 200     *
 201     * Let \c mt be a depth miptree with HiZ enabled. Then the resolve map is
 202     * \c mt->hiz_map. The resolve map of the child HiZ miptree, \c
 203     * mt->hiz_mt->hiz_map, is unused.
 204     */
 205    struct intel_resolve_map hiz_map;
 206
 207    /**
 208     * \brief Stencil miptree for depthstencil textures.
 209     *
 210     * This miptree is used for depthstencil textures and renderbuffers that
 211     * require separate stencil.  It always has the true copy of the stencil
 212     * bits, regardless of mt->format.
 213     *
 214     * \see intel_miptree_map_depthstencil()
 215     * \see intel_miptree_unmap_depthstencil()
 216     */
 217    struct intel_mipmap_tree *stencil_mt;
 218
 219    /* These are also refcounted:
 220     */
 221    GLuint refcount;
 222 };
 223
 224
 225
 226 struct intel_mipmap_tree *intel_miptree_create(struct intel_context *intel,
 227                                                GLenum target,
 228                                                gl_format format,
 229                                                GLuint first_level,
 230                                                GLuint last_level,
 231                                                GLuint width0,
 232                                                GLuint height0,
 233                                                GLuint depth0,
 234                                                bool expect_accelerated_upload);
 235
 236 struct intel_mipmap_tree *
 237 intel_miptree_create_for_region(struct intel_context *intel,
 238                                 GLenum target,
 239                                 gl_format format,
 240                                 struct intel_region *region);
 241
 242 /**
 243  * Create a miptree appropriate as the storage for a non-texture renderbuffer.
 244  * The miptree has the following properties:
 245  *     - The target is GL_TEXTURE_2D.
 246  *     - There are no levels other than the base level 0.
 247  *     - Depth is 1.
 248  */
 249 struct intel_mipmap_tree*
 250 intel_miptree_create_for_renderbuffer(struct intel_context *intel,
 251                                       gl_format format,
 252                                       uint32_t width,
 253                                       uint32_t height);
 254
 255 /** \brief Assert that the level and layer are valid for the miptree. */
 256 static inline void
 257 intel_miptree_check_level_layer(struct intel_mipmap_tree *mt,
 258                                 uint32_t level,
 259                                 uint32_t layer)
 260 {
 261    assert(level >= mt->first_level);
 262    assert(level <= mt->last_level);
 263    assert(layer < mt->level[level].depth);
 264 }
 265
 266 int intel_miptree_pitch_align (struct intel_context *intel,
 267                                struct intel_mipmap_tree *mt,
 268                                uint32_t tiling,
 269                                int pitch);
 270
 271 void intel_miptree_reference(struct intel_mipmap_tree **dst,
 272                              struct intel_mipmap_tree *src);
 273
 274 void intel_miptree_release(struct intel_mipmap_tree **mt);
 275
 276 /* Check if an image fits an existing mipmap tree layout
 277  */
 278 bool intel_miptree_match_image(struct intel_mipmap_tree *mt,
 279                                     struct gl_texture_image *image);
 280
 281 void
 282 intel_miptree_get_image_offset(struct intel_mipmap_tree *mt,
 283                                GLuint level, GLuint face, GLuint depth,
 284                                GLuint *x, GLuint *y);
 285
 286 void
 287 intel_miptree_get_dimensions_for_image(struct gl_texture_image *image,
 288                                        int *width, int *height, int *depth);
 289
 290 void intel_miptree_set_level_info(struct intel_mipmap_tree *mt,
 291                                   GLuint level,
 292                                   GLuint x, GLuint y,
 293                                   GLuint w, GLuint h, GLuint d);
 294
 295 void intel_miptree_set_image_offset(struct intel_mipmap_tree *mt,
 296                                     GLuint level,
 297                                     GLuint img, GLuint x, GLuint y);
 298
 299 void
 300 intel_miptree_copy_teximage(struct intel_context *intel,
 301                             struct intel_texture_image *intelImage,
 302                             struct intel_mipmap_tree *dst_mt);
 303
 304 /**
 305  * Copy the stencil data from \c mt->stencil_mt->region to \c mt->region for
 306  * the given miptree slice.
 307  *
 308  * \see intel_mipmap_tree::stencil_mt
 309  */
 310 void
 311 intel_miptree_s8z24_scatter(struct intel_context *intel,
 312                             struct intel_mipmap_tree *mt,
 313                             uint32_t level,
 314                             uint32_t slice);
 315
 316 /**
 317  * Copy the stencil data in \c mt->stencil_mt->region to \c mt->region for the
 318  * given miptree slice.
 319  *
 320  * \see intel_mipmap_tree::stencil_mt
 321  */
 322 void
 323 intel_miptree_s8z24_gather(struct intel_context *intel,
 324                            struct intel_mipmap_tree *mt,
 325                            uint32_t level,
 326                            uint32_t layer);
 327
 328 /**
 329  * \name Miptree HiZ functions
 330  * \{
 331  *
 332  * It is safe to call the "slice_set_need_resolve" and "slice_resolve"
 333  * functions on a miptree without HiZ. In that case, each function is a no-op.
 334  */
 335
 336 /**
 337  * \brief Allocate the miptree's embedded HiZ miptree.
 338  * \see intel_mipmap_tree:hiz_mt
 339  * \return false if allocation failed
 340  */
 341
 342 bool
 343 intel_miptree_alloc_hiz(struct intel_context *intel,
 344                         struct intel_mipmap_tree *mt);
 345
 346 void
 347 intel_miptree_slice_set_needs_hiz_resolve(struct intel_mipmap_tree *mt,
 348                                           uint32_t level,
 349                                           uint32_t depth);
 350 void
 351 intel_miptree_slice_set_needs_depth_resolve(struct intel_mipmap_tree *mt,
 352                                             uint32_t level,
 353                                             uint32_t depth);
 354 void
 355 intel_miptree_all_slices_set_need_hiz_resolve(struct intel_mipmap_tree *mt);
 356
 357 void
 358 intel_miptree_all_slices_set_need_depth_resolve(struct intel_mipmap_tree *mt);
 359
 360 /**
 361  * \return false if no resolve was needed
 362  */
 363 bool
 364 intel_miptree_slice_resolve_hiz(struct intel_context *intel,
 365                                 struct intel_mipmap_tree *mt,
 366                                 unsigned int level,
 367                                 unsigned int depth);
 368
 369 /**
 370  * \return false if no resolve was needed
 371  */
 372 bool
 373 intel_miptree_slice_resolve_depth(struct intel_context *intel,
 374                                   struct intel_mipmap_tree *mt,
 375                                   unsigned int level,
 376                                   unsigned int depth);
 377
 378 /**
 379  * \return false if no resolve was needed
 380  */
 381 bool
 382 intel_miptree_all_slices_resolve_hiz(struct intel_context *intel,
 383                                      struct intel_mipmap_tree *mt);
 384
 385 /**
 386  * \return false if no resolve was needed
 387  */
 388 bool
 389 intel_miptree_all_slices_resolve_depth(struct intel_context *intel,
 390                                        struct intel_mipmap_tree *mt);
 391
 392 /**\}*/
 393
 394 /* i915_mipmap_tree.c:
 395  */
 396 void i915_miptree_layout(struct intel_mipmap_tree *mt);
 397 void i945_miptree_layout(struct intel_mipmap_tree *mt);
 398 void brw_miptree_layout(struct intel_context *intel,
 399                         struct intel_mipmap_tree *mt);
 400
 401 void
 402 intel_miptree_map(struct intel_context *intel,
 403                   struct intel_mipmap_tree *mt,
 404                   unsigned int level,
 405                   unsigned int slice,
 406                   unsigned int x,
 407                   unsigned int y,
 408                   unsigned int w,
 409                   unsigned int h,
 410                   GLbitfield mode,
 411                   void **out_ptr,
 412                   int *out_stride);
 413
 414 void
 415 intel_miptree_unmap(struct intel_context *intel,
 416                     struct intel_mipmap_tree *mt,
 417                     unsigned int level,
 418                     unsigned int slice);
 419
 420 #ifdef __cplusplus
 421 }
 422 #endif
 423
 424 #endif