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 struct mem_block
*memBlock
; /**< Memory block containing texture */
71 unsigned reserved
; /**< Cannot be swapped out by user contexts. */
73 unsigned bound
; /**< Bitmask indicating which tex units
74 * this texture object is bound to.
75 * Bit 0 = unit 0, Bit 1 = unit 1, etc
78 unsigned totalSize
; /**< Total size of the texture,
79 * including all mipmap levels
82 unsigned dirty_images
[6]; /**< Flags for whether or not images
83 * need to be uploaded to local or
84 * AGP texture space. One flag set
85 * for each cube face for cubic
86 * textures. Bit zero corresponds to
87 * the base-level, which may or may
88 * not be the level zero mipmap.
91 unsigned timestamp
; /**< Timestamp used to
92 * synchronize with 3d engine
93 * in hardware where textures
94 * are uploaded directly to
98 unsigned firstLevel
; /**< Image in \c tObj->Image[0] that
99 * corresponds to the base-level of
100 * this texture object.
103 unsigned lastLevel
; /**< Last image in \c tObj->Image[0]
105 * current LOD settings of
106 * this texture object. This
107 * value must be greater than
108 * or equal to \c firstLevel.
113 typedef void (destroy_texture_object_t
)( void * driverContext
,
114 driTextureObject
* t
);
117 * Client-private representation of texture memory state.
119 * Clients will place one or more of these structs in their driver
120 * context struct to manage one or more global texture heaps.
123 struct dri_tex_heap
{
125 /** Client-supplied heap identifier
129 /** Pointer to the client's private context
133 /** Total size of the heap, in bytes
137 /** \brief \f$log_2\f$ of size of single heap region
139 * Each context takes memory from the global texture heap in
140 * \f$2^{logGranularity}\f$ byte blocks. The value of
141 * \a logGranularity is based on the amount of memory represented
142 * by the heap and the maximum number of regions in the SAREA. Given
143 * \a b bytes of texture memory an \a n regions in the SAREA,
144 * \a logGranularity will be \f$\lfloor\log_2( b / n )\rfloor\f$.
146 unsigned logGranularity
;
148 /** \brief Required alignment of allocations in this heap
150 * The alignment shift is supplied to \a mmAllocMem when memory is
151 * allocated from this heap. The value of \a alignmentShift will
152 * typically reflect some require of the hardware. This value has
153 * \b no \b relation to \a logGranularity. \a alignmentShift is a
158 unsigned alignmentShift
;
160 /** Number of elements in global list (the SAREA).
164 /** Pointer to SAREA \a driTexRegion array
166 drmTextureRegionPtr global_regions
;
168 /** Pointer to the texture state age (generation number) in the SAREA
170 unsigned * global_age
;
172 /** Local age (generation number) of texture state
176 /** Memory heap used to manage texture memory represented by
179 struct mem_block
* memory_heap
;
181 /** List of objects that we currently believe to be in texture
184 driTextureObject texture_objects
;
186 /** Pointer to the list of texture objects that are not in
189 driTextureObject
* swapped_objects
;
191 /** Size of the driver-speicific texture object.
193 unsigned texture_object_size
;
197 * \brief Function to destroy driver-specific texture object data.
199 * This function is supplied by the driver so that the texture manager
200 * can release all resources associated with a texture object. This
201 * function should only release driver-specific data. That is,
202 * \a driDestroyTextureObject will release the texture memory
203 * associated with the texture object, it will release the memory
204 * for the texture object itself, and it will unlink the texture
205 * object from the texture object lists.
207 * \param driverContext Pointer to the driver supplied context
208 * \param t Texture object that is to be destroyed
209 * \sa driDestroyTextureObject
212 destroy_texture_object_t
* destroy_texture_object
;
217 unsigned * texture_swaps
;
220 * Timestamp used to synchronize with 3d engine in hardware
221 * where textures are uploaded directly to the
226 /** \brief Kick/upload weight
228 * When not enough free space is available this weight
229 * influences the choice of the heap from which textures are
230 * kicked. By default the weight is equal to the heap size.
234 /** \brief Kick/upload duty
236 * The heap with the highest duty will be chosen for kicking
237 * textures if not enough free space is available. The duty is
238 * reduced by the amount of data kicked. Rebalancing of
239 * negative duties takes the weights into account.
248 * Called by the client on lock contention to determine whether textures have
249 * been stolen. If another client has modified a region in which we have
250 * textures, then we need to figure out which of our textures have been
251 * removed and update our global LRU.
253 * \param heap Texture heap to be updated
257 #define DRI_AGE_TEXTURES( heap ) \
259 if ( ((heap) != NULL) \
260 && ((heap)->local_age != (heap)->global_age[0]) ) \
261 driAgeTextures( heap ); \
267 /* This should be called whenever there has been contention on the hardware
268 * lock. driAgeTextures should not be called directly. Instead, clients
269 * should use DRI_AGE_TEXTURES, above.
272 void driAgeTextures( driTexHeap
* heap
);
274 void driUpdateTextureLRU( driTextureObject
* t
);
275 void driSwapOutTextureObject( driTextureObject
* t
);
276 void driDestroyTextureObject( driTextureObject
* t
);
277 int driAllocateTexture( driTexHeap
* const * heap_array
, unsigned nr_heaps
,
278 driTextureObject
* t
);
280 GLboolean
driIsTextureResident( GLcontext
* ctx
,
281 struct gl_texture_object
* texObj
);
283 driTexHeap
* driCreateTextureHeap( unsigned heap_id
, void * context
,
284 unsigned size
, unsigned alignmentShift
, unsigned nr_regions
,
285 drmTextureRegionPtr global_regions
, unsigned * global_age
,
286 driTextureObject
* swapped_objects
, unsigned texture_object_size
,
287 destroy_texture_object_t
* destroy_tex_obj
);
288 void driDestroyTextureHeap( driTexHeap
* heap
);
291 driCalculateMaxTextureLevels( driTexHeap
* const * heaps
,
293 struct gl_constants
* limits
,
294 unsigned max_bytes_per_texel
,
295 unsigned max_2D_size
,
296 unsigned max_3D_size
,
297 unsigned max_cube_size
,
298 unsigned max_rect_size
,
299 unsigned mipmaps_at_once
,
300 int all_textures_one_heap
);
303 driSetTextureSwapCounterLocation( driTexHeap
* heap
, unsigned * counter
);
305 #define DRI_TEXMGR_DO_TEXTURE_1D 0x0001
306 #define DRI_TEXMGR_DO_TEXTURE_2D 0x0002
307 #define DRI_TEXMGR_DO_TEXTURE_3D 0x0004
308 #define DRI_TEXMGR_DO_TEXTURE_CUBE 0x0008
309 #define DRI_TEXMGR_DO_TEXTURE_RECT 0x0010
311 void driInitTextureObjects( GLcontext
*ctx
, driTextureObject
* swapped
,
314 GLboolean
driValidateTextureHeaps( driTexHeap
* const * texture_heaps
,
315 unsigned nr_heaps
, const driTextureObject
* swapped
);
317 extern void driCalculateTextureFirstLastLevel( driTextureObject
* t
);
320 extern const struct gl_texture_format
*_dri_texformat_rgba8888
;
321 extern const struct gl_texture_format
*_dri_texformat_argb8888
;
322 extern const struct gl_texture_format
*_dri_texformat_rgb565
;
323 extern const struct gl_texture_format
*_dri_texformat_argb4444
;
324 extern const struct gl_texture_format
*_dri_texformat_argb1555
;
325 extern const struct gl_texture_format
*_dri_texformat_al88
;
326 extern const struct gl_texture_format
*_dri_texformat_a8
;
327 extern const struct gl_texture_format
*_dri_texformat_ci8
;
328 extern const struct gl_texture_format
*_dri_texformat_i8
;
329 extern const struct gl_texture_format
*_dri_texformat_l8
;
331 extern void driInitTextureFormats( void );
333 #endif /* DRI_TEXMEM_H */