2 * Copyright 2000-2001 VA Linux Systems, Inc.
3 * (c) Copyright IBM Corporation 2002
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * on the rights to use, copy, modify, merge, publish, distribute, sub
10 * license, and/or sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
20 * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
23 * USE OR OTHER DEALINGS IN THE SOFTWARE.
26 * Ian Romanick <idr@us.ibm.com>
27 * Keith Whitwell <keithw@tungstengraphics.com>
28 * Kevin E. Martin <kem@users.sourceforge.net>
29 * Gareth Hughes <gareth@nvidia.com>
34 * Public interface to the DRI texture memory management routines.
47 typedef struct dri_tex_heap driTexHeap
;
49 struct dri_texture_object
;
50 typedef struct dri_texture_object driTextureObject
;
54 * Base texture object type. Each driver will extend this type with its own
55 * private data members.
58 struct dri_texture_object
{
59 struct dri_texture_object
* next
;
60 struct dri_texture_object
* prev
;
62 driTexHeap
* heap
; /**< Texture heap currently stored in */
63 struct gl_texture_object
* tObj
;/**< Pointer to Mesa texture object
64 * If NULL, this texture object is a
65 * "placeholder" object representing
66 * texture memory in use by another context.
67 * A placeholder should have a heap and a memBlock.
69 PMemBlock memBlock
; /**< Memory block containing texture */
70 unsigned bound
; /**< Texture unit currently bound to */
72 unsigned totalSize
; /**< Total size of the texture,
73 * including all mipmap levels
76 unsigned dirty_images
[6]; /**< Flags for whether or not images
77 * need to be uploaded to local or
78 * AGP texture space. One flag set
79 * for each cube face for cubic
80 * textures. Bit zero corresponds to
81 * the base-level, which may or may
82 * not be the level zero mipmap.
85 unsigned timestamp
; /**< Timestamp used to
86 * synchronize with 3d engine
87 * in hardware where textures
88 * are uploaded directly to
92 unsigned firstLevel
; /**< Image in \c tObj->Image[0] that
93 * corresponds to the base-level of
94 * this texture object.
97 unsigned lastLevel
; /**< Last image in \c tObj->Image[0]
99 * current LOD settings of
100 * this texture object. This
101 * value must be greater than
102 * or equal to \c firstLevel.
107 typedef void (destroy_texture_object_t
)( void * driverContext
,
108 driTextureObject
* t
);
111 * Client-private representation of texture memory state.
113 * Clients will place one or more of these structs in their driver
114 * context struct to manage one or more global texture heaps.
117 struct dri_tex_heap
{
119 /** Client-supplied heap identifier
123 /** Pointer to the client's private context
127 /** Total size of the heap, in bytes
131 /** \brief \f$log_2\f$ of size of single heap region
133 * Each context takes memory from the global texture heap in
134 * \f$2^{logGranularity}\f$ byte blocks. The value of
135 * \a logGranularity is based on the amount of memory represented
136 * by the heap and the maximum number of regions in the SAREA. Given
137 * \a b bytes of texture memory an \a n regions in the SAREA,
138 * \a logGranularity will be \f$\lfloor\log_2( b / n )\rfloor\f$.
140 unsigned logGranularity
;
142 /** \brief Required alignment of allocations in this heap
144 * The alignment shift is supplied to \a mmAllocMem when memory is
145 * allocated from this heap. The value of \a alignmentShift will
146 * typically reflect some require of the hardware. This value has
147 * \b no \b relation to \a logGranularity. \a alignmentShift is a
152 unsigned alignmentShift
;
154 /** Number of elements in global list (the SAREA).
158 /** Pointer to SAREA \a driTexRegion array
160 drmTextureRegionPtr global_regions
;
162 /** Pointer to the texture state age (generation number) in the SAREA
164 unsigned * global_age
;
166 /** Local age (generation number) of texture state
170 /** Memory heap used to manage texture memory represented by
173 memHeap_t
* memory_heap
;
175 /** List of objects that we currently believe to be in texture
178 driTextureObject texture_objects
;
180 /** Pointer to the list of texture objects that are not in
183 driTextureObject
* swapped_objects
;
185 /** Size of the driver-speicific texture object.
187 unsigned texture_object_size
;
191 * \brief Function to destroy driver-specific texture object data.
193 * This function is supplied by the driver so that the texture manager
194 * can release all resources associated with a texture object. This
195 * function should only release driver-specific data. That is,
196 * \a driDestroyTextureObject will release the texture memory
197 * associated with the texture object, it will release the memory
198 * for the texture object itself, and it will unlink the texture
199 * object from the texture object lists.
201 * \param driverContext Pointer to the driver supplied context
202 * \param t Texture object that is to be destroyed
203 * \sa driDestroyTextureObject
206 destroy_texture_object_t
* destroy_texture_object
;
211 unsigned * texture_swaps
;
214 * Timestamp used to synchronize with 3d engine in hardware
215 * where textures are uploaded directly to the
220 /** \brief Kick/upload weight
222 * When not enough free space is available this weight
223 * influences the choice of the heap from which textures are
224 * kicked. By default the weight is equal to the heap size.
228 /** \brief Kick/upload duty
230 * The heap with the highest duty will be chosen for kicking
231 * textures if not enough free space is available. The duty is
232 * reduced by the amount of data kicked. Rebalancing of
233 * negative duties takes the weights into account.
242 * Called by the client on lock contention to determine whether textures have
243 * been stolen. If another client has modified a region in which we have
244 * textures, then we need to figure out which of our textures have been
245 * removed and update our global LRU.
247 * \param heap Texture heap to be updated
251 #define DRI_AGE_TEXTURES( heap ) \
253 if ( ((heap) != NULL) \
254 && ((heap)->local_age != (heap)->global_age[0]) ) \
255 driAgeTextures( heap ); \
261 /* This should be called whenever there has been contention on the hardware
262 * lock. driAgeTextures should not be called directly. Instead, clients
263 * should use DRI_AGE_TEXTURES, above.
266 void driAgeTextures( driTexHeap
* heap
);
268 void driUpdateTextureLRU( driTextureObject
* t
);
269 void driSwapOutTextureObject( driTextureObject
* t
);
270 void driDestroyTextureObject( driTextureObject
* t
);
271 int driAllocateTexture( driTexHeap
* const * heap_array
, unsigned nr_heaps
,
272 driTextureObject
* t
);
274 GLboolean
driIsTextureResident( GLcontext
* ctx
,
275 struct gl_texture_object
* texObj
);
277 driTexHeap
* driCreateTextureHeap( unsigned heap_id
, void * context
,
278 unsigned size
, unsigned alignmentShift
, unsigned nr_regions
,
279 drmTextureRegionPtr global_regions
, unsigned * global_age
,
280 driTextureObject
* swapped_objects
, unsigned texture_object_size
,
281 destroy_texture_object_t
* destroy_tex_obj
);
282 void driDestroyTextureHeap( driTexHeap
* heap
);
285 driCalculateMaxTextureLevels( driTexHeap
* const * heaps
,
287 struct gl_constants
* limits
,
288 unsigned max_bytes_per_texel
,
289 unsigned max_2D_size
,
290 unsigned max_3D_size
,
291 unsigned max_cube_size
,
292 unsigned max_rect_size
,
293 unsigned mipmaps_at_once
,
294 int all_textures_one_heap
);
297 driSetTextureSwapCounterLocation( driTexHeap
* heap
, unsigned * counter
);
299 #define DRI_TEXMGR_DO_TEXTURE_1D 0x0001
300 #define DRI_TEXMGR_DO_TEXTURE_2D 0x0002
301 #define DRI_TEXMGR_DO_TEXTURE_3D 0x0004
302 #define DRI_TEXMGR_DO_TEXTURE_CUBE 0x0008
303 #define DRI_TEXMGR_DO_TEXTURE_RECT 0x0010
305 void driInitTextureObjects( GLcontext
*ctx
, driTextureObject
* swapped
,
308 GLboolean
driValidateTextureHeaps( driTexHeap
* const * texture_heaps
,
309 unsigned nr_heaps
, const driTextureObject
* swapped
);
311 extern void driCalculateTextureFirstLastLevel( driTextureObject
* t
);
314 extern const struct gl_texture_format
*_dri_texformat_rgba8888
;
315 extern const struct gl_texture_format
*_dri_texformat_argb8888
;
316 extern const struct gl_texture_format
*_dri_texformat_rgb565
;
317 extern const struct gl_texture_format
*_dri_texformat_argb4444
;
318 extern const struct gl_texture_format
*_dri_texformat_argb1555
;
319 extern const struct gl_texture_format
*_dri_texformat_al88
;
320 extern const struct gl_texture_format
*_dri_texformat_a8
;
321 extern const struct gl_texture_format
*_dri_texformat_ci8
;
322 extern const struct gl_texture_format
*_dri_texformat_i8
;
323 extern const struct gl_texture_format
*_dri_texformat_l8
;
325 extern void driInitTextureFormats( void );
327 #endif /* DRI_TEXMEM_H */