1 /**************************************************************************
3 * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
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28 #ifndef INTEL_MIPMAP_TREE_H
29 #define INTEL_MIPMAP_TREE_H
33 #include "intel_regions.h"
34 #include "intel_resolve_map.h"
36 /* A layer on top of the intel_regions code which adds:
38 * - Code to size and layout a region to hold a set of mipmaps.
39 * - Query to determine if a new image fits in an existing tree.
41 * - maybe able to remove refcounting from intel_region?
44 * The fixed mipmap layout of intel hardware where one offset
45 * specifies the position of all images in a mipmap hierachy
46 * complicates the implementation of GL texture image commands,
47 * compared to hardware where each image is specified with an
50 * In an ideal world, each texture object would be associated with a
51 * single bufmgr buffer or 2d intel_region, and all the images within
52 * the texture object would slot into the tree as they arrive. The
53 * reality can be a little messier, as images can arrive from the user
54 * with sizes that don't fit in the existing tree, or in an order
55 * where the tree layout cannot be guessed immediately.
57 * This structure encodes an idealized mipmap tree. The GL image
58 * commands build these where possible, otherwise store the images in
59 * temporary system buffers.
62 struct intel_resolve_map
;
63 struct intel_texture_image
;
65 struct intel_miptree_map
{
66 /** Bitfield of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT, GL_MAP_INVALIDATE_BIT */
68 /** Region of interest for the map. */
70 /** Possibly malloced temporary buffer for the mapping. */
72 /** Possible pointer to a BO temporary for the mapping. */
74 /** Pointer to the start of (map_x, map_y) returned by the mapping. */
76 /** Stride of the mapping. */
81 * Describes the location of each texture image within a texture region.
83 struct intel_mipmap_level
85 /** Offset to this miptree level, used in computing x_offset. */
87 /** Offset to this miptree level, used in computing y_offset. */
93 * \brief Number of 2D slices in this miplevel.
95 * The exact semantics of depth varies according to the texture target:
96 * - For GL_TEXTURE_CUBE_MAP, depth is 6.
97 * - For GL_TEXTURE_2D_ARRAY, depth is the number of array slices. It is
98 * identical for all miplevels in the texture.
99 * - For GL_TEXTURE_3D, it is the texture's depth at this miplevel. Its
100 * value, like width and height, varies with miplevel.
101 * - For other texture types, depth is 1.
106 * \brief List of 2D images in this mipmap level.
108 * This may be a list of cube faces, array slices in 2D array texture, or
109 * layers in a 3D texture. The list's length is \c depth.
111 struct intel_mipmap_slice
{
113 * \name Offset to slice
116 * Hardware formats are so diverse that that there is no unified way to
117 * compute the slice offsets, so we store them in this table.
119 * The (x, y) offset to slice \c s at level \c l relative the miptrees
122 * x = mt->level[l].slice[s].x_offset
123 * y = mt->level[l].slice[s].y_offset
130 * Pointer to mapping information, present across
131 * intel_tex_image_map()/unmap of the slice.
133 struct intel_miptree_map
*map
;
137 struct intel_mipmap_tree
139 /* Effectively the key:
144 * Generally, this is just the same as the gl_texture_image->TexFormat or
145 * gl_renderbuffer->Format.
147 * However, for textures and renderbuffers with packed depth/stencil formats
148 * on hardware where we want or need to use separate stencil, there will be
149 * two miptrees for storing the data. If the depthstencil texture or rb is
150 * MESA_FORMAT_Z32_FLOAT_X24S8, then mt->format will be
151 * MESA_FORMAT_Z32_FLOAT, otherwise for MESA_FORMAT_S8_Z24 objects it will be
152 * MESA_FORMAT_S8_Z24.
157 * The X offset of each image in the miptree must be aligned to this. See
158 * the "Alignment Unit Size" section of the BSpec.
160 unsigned int align_w
;
161 unsigned int align_h
; /**< \see align_w */
166 GLuint width0
, height0
, depth0
; /**< Level zero image dimensions */
170 /* Derived from the above:
175 /* Includes image offset tables:
177 struct intel_mipmap_level level
[MAX_TEXTURE_LEVELS
];
179 /* The data is held here:
181 struct intel_region
*region
;
186 * This is non-null only if HiZ is enabled for this miptree.
188 * \see intel_miptree_alloc_hiz()
190 struct intel_mipmap_tree
*hiz_mt
;
193 * \brief Map of miptree slices to needed resolves.
195 * This is used only when the miptree has a child HiZ miptree.
197 * Let \c mt be a depth miptree with HiZ enabled. Then the resolve map is
198 * \c mt->hiz_map. The resolve map of the child HiZ miptree, \c
199 * mt->hiz_mt->hiz_map, is unused.
201 struct intel_resolve_map hiz_map
;
204 * \brief Stencil miptree for depthstencil textures.
206 * This miptree is used for depthstencil textures and renderbuffers that
207 * require separate stencil. It always has the true copy of the stencil
208 * bits, regardless of mt->format.
210 * \see intel_miptree_map_depthstencil()
211 * \see intel_miptree_unmap_depthstencil()
213 struct intel_mipmap_tree
*stencil_mt
;
215 /* These are also refcounted:
222 struct intel_mipmap_tree
*intel_miptree_create(struct intel_context
*intel
,
230 bool expect_accelerated_upload
);
232 struct intel_mipmap_tree
*
233 intel_miptree_create_for_region(struct intel_context
*intel
,
236 struct intel_region
*region
);
239 * Create a miptree appropriate as the storage for a non-texture renderbuffer.
240 * The miptree has the following properties:
241 * - The target is GL_TEXTURE_2D.
242 * - There are no levels other than the base level 0.
245 struct intel_mipmap_tree
*
246 intel_miptree_create_for_renderbuffer(struct intel_context
*intel
,
251 /** \brief Assert that the level and layer are valid for the miptree. */
253 intel_miptree_check_level_layer(struct intel_mipmap_tree
*mt
,
257 assert(level
>= mt
->first_level
);
258 assert(level
<= mt
->last_level
);
259 assert(layer
< mt
->level
[level
].depth
);
262 int intel_miptree_pitch_align (struct intel_context
*intel
,
263 struct intel_mipmap_tree
*mt
,
267 void intel_miptree_reference(struct intel_mipmap_tree
**dst
,
268 struct intel_mipmap_tree
*src
);
270 void intel_miptree_release(struct intel_mipmap_tree
**mt
);
272 /* Check if an image fits an existing mipmap tree layout
274 bool intel_miptree_match_image(struct intel_mipmap_tree
*mt
,
275 struct gl_texture_image
*image
);
278 intel_miptree_get_image_offset(struct intel_mipmap_tree
*mt
,
279 GLuint level
, GLuint face
, GLuint depth
,
280 GLuint
*x
, GLuint
*y
);
283 intel_miptree_get_dimensions_for_image(struct gl_texture_image
*image
,
284 int *width
, int *height
, int *depth
);
286 void intel_miptree_set_level_info(struct intel_mipmap_tree
*mt
,
289 GLuint w
, GLuint h
, GLuint d
);
291 void intel_miptree_set_image_offset(struct intel_mipmap_tree
*mt
,
293 GLuint img
, GLuint x
, GLuint y
);
296 intel_miptree_copy_teximage(struct intel_context
*intel
,
297 struct intel_texture_image
*intelImage
,
298 struct intel_mipmap_tree
*dst_mt
);
301 * Copy the stencil data from \c mt->stencil_mt->region to \c mt->region for
302 * the given miptree slice.
304 * \see intel_mipmap_tree::stencil_mt
307 intel_miptree_s8z24_scatter(struct intel_context
*intel
,
308 struct intel_mipmap_tree
*mt
,
313 * Copy the stencil data in \c mt->stencil_mt->region to \c mt->region for the
314 * given miptree slice.
316 * \see intel_mipmap_tree::stencil_mt
319 intel_miptree_s8z24_gather(struct intel_context
*intel
,
320 struct intel_mipmap_tree
*mt
,
325 * \name Miptree HiZ functions
328 * It is safe to call the "slice_set_need_resolve" and "slice_resolve"
329 * functions on a miptree without HiZ. In that case, each function is a no-op.
333 * \brief Allocate the miptree's embedded HiZ miptree.
334 * \see intel_mipmap_tree:hiz_mt
335 * \return false if allocation failed
339 intel_miptree_alloc_hiz(struct intel_context
*intel
,
340 struct intel_mipmap_tree
*mt
);
343 intel_miptree_slice_set_needs_hiz_resolve(struct intel_mipmap_tree
*mt
,
347 intel_miptree_slice_set_needs_depth_resolve(struct intel_mipmap_tree
*mt
,
351 intel_miptree_all_slices_set_need_hiz_resolve(struct intel_mipmap_tree
*mt
);
354 intel_miptree_all_slices_set_need_depth_resolve(struct intel_mipmap_tree
*mt
);
357 * \return false if no resolve was needed
360 intel_miptree_slice_resolve_hiz(struct intel_context
*intel
,
361 struct intel_mipmap_tree
*mt
,
366 * \return false if no resolve was needed
369 intel_miptree_slice_resolve_depth(struct intel_context
*intel
,
370 struct intel_mipmap_tree
*mt
,
375 * \return false if no resolve was needed
378 intel_miptree_all_slices_resolve_hiz(struct intel_context
*intel
,
379 struct intel_mipmap_tree
*mt
);
382 * \return false if no resolve was needed
385 intel_miptree_all_slices_resolve_depth(struct intel_context
*intel
,
386 struct intel_mipmap_tree
*mt
);
390 /* i915_mipmap_tree.c:
392 void i915_miptree_layout(struct intel_mipmap_tree
*mt
);
393 void i945_miptree_layout(struct intel_mipmap_tree
*mt
);
394 void brw_miptree_layout(struct intel_context
*intel
,
395 struct intel_mipmap_tree
*mt
);
398 intel_miptree_map(struct intel_context
*intel
,
399 struct intel_mipmap_tree
*mt
,
411 intel_miptree_unmap(struct intel_context
*intel
,
412 struct intel_mipmap_tree
*mt
,