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:
145 * The X offset of each image in the miptree must be aligned to this. See
146 * the "Alignment Unit Size" section of the BSpec.
148 unsigned int align_w
;
149 unsigned int align_h
; /**< \see align_w */
154 GLuint width0
, height0
, depth0
; /**< Level zero image dimensions */
158 /* Derived from the above:
163 /* Includes image offset tables:
165 struct intel_mipmap_level level
[MAX_TEXTURE_LEVELS
];
167 /* The data is held here:
169 struct intel_region
*region
;
174 * This is non-null only if HiZ is enabled for this miptree.
176 * \see intel_miptree_alloc_hiz()
178 struct intel_mipmap_tree
*hiz_mt
;
181 * \brief Map of miptree slices to needed resolves.
183 * This is used only when the miptree has a child HiZ miptree.
185 * Let \c mt be a depth miptree with HiZ enabled. Then the resolve map is
186 * \c mt->hiz_map. The resolve map of the child HiZ miptree, \c
187 * mt->hiz_mt->hiz_map, is unused.
189 struct intel_resolve_map hiz_map
;
192 * \brief Stencil miptree for depthstencil textures.
194 * This miptree is used for depthstencil textures that require separate
195 * stencil. The stencil miptree's data is the golden copy of the
196 * parent miptree's stencil bits. When necessary, we scatter/gather the
197 * stencil bits between the parent miptree and the stencil miptree.
199 * \see intel_miptree_s8z24_scatter()
200 * \see intel_miptree_s8z24_gather()
202 struct intel_mipmap_tree
*stencil_mt
;
204 /* These are also refcounted:
211 struct intel_mipmap_tree
*intel_miptree_create(struct intel_context
*intel
,
219 bool expect_accelerated_upload
);
221 struct intel_mipmap_tree
*
222 intel_miptree_create_for_region(struct intel_context
*intel
,
225 struct intel_region
*region
);
228 * Create a miptree appropriate as the storage for a non-texture renderbuffer.
229 * The miptree has the following properties:
230 * - The target is GL_TEXTURE_2D.
231 * - There are no levels other than the base level 0.
234 struct intel_mipmap_tree
*
235 intel_miptree_create_for_renderbuffer(struct intel_context
*intel
,
242 /** \brief Assert that the level and layer are valid for the miptree. */
244 intel_miptree_check_level_layer(struct intel_mipmap_tree
*mt
,
248 assert(level
>= mt
->first_level
);
249 assert(level
<= mt
->last_level
);
250 assert(layer
< mt
->level
[level
].depth
);
253 int intel_miptree_pitch_align (struct intel_context
*intel
,
254 struct intel_mipmap_tree
*mt
,
258 void intel_miptree_reference(struct intel_mipmap_tree
**dst
,
259 struct intel_mipmap_tree
*src
);
261 void intel_miptree_release(struct intel_mipmap_tree
**mt
);
263 /* Check if an image fits an existing mipmap tree layout
265 bool intel_miptree_match_image(struct intel_mipmap_tree
*mt
,
266 struct gl_texture_image
*image
);
269 intel_miptree_get_image_offset(struct intel_mipmap_tree
*mt
,
270 GLuint level
, GLuint face
, GLuint depth
,
271 GLuint
*x
, GLuint
*y
);
274 intel_miptree_get_dimensions_for_image(struct gl_texture_image
*image
,
275 int *width
, int *height
, int *depth
);
277 void intel_miptree_set_level_info(struct intel_mipmap_tree
*mt
,
280 GLuint w
, GLuint h
, GLuint d
);
282 void intel_miptree_set_image_offset(struct intel_mipmap_tree
*mt
,
284 GLuint img
, GLuint x
, GLuint y
);
287 intel_miptree_copy_teximage(struct intel_context
*intel
,
288 struct intel_texture_image
*intelImage
,
289 struct intel_mipmap_tree
*dst_mt
);
292 * Copy the stencil data from \c mt->stencil_mt->region to \c mt->region for
293 * the given miptree slice.
295 * \see intel_mipmap_tree::stencil_mt
298 intel_miptree_s8z24_scatter(struct intel_context
*intel
,
299 struct intel_mipmap_tree
*mt
,
304 * Copy the stencil data in \c mt->stencil_mt->region to \c mt->region for the
305 * given miptree slice.
307 * \see intel_mipmap_tree::stencil_mt
310 intel_miptree_s8z24_gather(struct intel_context
*intel
,
311 struct intel_mipmap_tree
*mt
,
316 * \name Miptree HiZ functions
319 * It is safe to call the "slice_set_need_resolve" and "slice_resolve"
320 * functions on a miptree without HiZ. In that case, each function is a no-op.
324 * \brief Allocate the miptree's embedded HiZ miptree.
325 * \see intel_mipmap_tree:hiz_mt
326 * \return false if allocation failed
330 intel_miptree_alloc_hiz(struct intel_context
*intel
,
331 struct intel_mipmap_tree
*mt
);
334 intel_miptree_slice_set_needs_hiz_resolve(struct intel_mipmap_tree
*mt
,
338 intel_miptree_slice_set_needs_depth_resolve(struct intel_mipmap_tree
*mt
,
342 intel_miptree_all_slices_set_need_hiz_resolve(struct intel_mipmap_tree
*mt
);
345 intel_miptree_all_slices_set_need_depth_resolve(struct intel_mipmap_tree
*mt
);
348 * \return false if no resolve was needed
351 intel_miptree_slice_resolve_hiz(struct intel_context
*intel
,
352 struct intel_mipmap_tree
*mt
,
357 * \return false if no resolve was needed
360 intel_miptree_slice_resolve_depth(struct intel_context
*intel
,
361 struct intel_mipmap_tree
*mt
,
366 * \return false if no resolve was needed
369 intel_miptree_all_slices_resolve_hiz(struct intel_context
*intel
,
370 struct intel_mipmap_tree
*mt
);
373 * \return false if no resolve was needed
376 intel_miptree_all_slices_resolve_depth(struct intel_context
*intel
,
377 struct intel_mipmap_tree
*mt
);
381 /* i915_mipmap_tree.c:
383 void i915_miptree_layout(struct intel_mipmap_tree
*mt
);
384 void i945_miptree_layout(struct intel_mipmap_tree
*mt
);
385 void brw_miptree_layout(struct intel_context
*intel
,
386 struct intel_mipmap_tree
*mt
);
389 intel_miptree_map(struct intel_context
*intel
,
390 struct intel_mipmap_tree
*mt
,
402 intel_miptree_unmap(struct intel_context
*intel
,
403 struct intel_mipmap_tree
*mt
,