2 * Copyright 2000-2001 VA Linux Systems, Inc.
3 * (C) Copyright IBM Corporation 2002, 2003
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>
33 * Implements all of the device-independent texture memory management.
35 * Currently, only a simple LRU texture memory management policy is
36 * implemented. In the (hopefully very near) future, better policies will be
37 * implemented. The idea is that the DRI should be able to run in one of two
38 * modes. In the default mode the DRI will dynamically attempt to discover
39 * the best texture management policy for the running application. In the
40 * other mode, the user (via some sort of as yet TBD mechanism) will select
41 * a texture management policy that is known to work well with the
45 #include "main/imports.h"
46 #include "main/macros.h"
47 #include "main/simple_list.h"
51 static unsigned dummy_swap_counter
;
55 * Calculate \f$\log_2\f$ of a value. This is a particularly poor
56 * implementation of this function. However, since system performance is in
57 * no way dependent on this function, the slowness of the implementation is
60 * \param n Value whose \f$\log_2\f$ is to be calculated
68 for ( log2
= 1 ; n
> 1 ; log2
++ ) {
79 * Determine if a texture is resident in textureable memory. Depending on
80 * the driver, this may or may not be on-card memory. It could be AGP memory
81 * or anyother type of memory from which the hardware can directly read
84 * This function is intended to be used as the \c IsTextureResident function
85 * in the device's \c dd_function_table.
87 * \param ctx GL context pointer (currently unused)
88 * \param texObj Texture object to be tested
92 driIsTextureResident( struct gl_context
* ctx
,
93 struct gl_texture_object
* texObj
)
98 t
= (driTextureObject
*) texObj
->DriverData
;
99 return( (t
!= NULL
) && (t
->memBlock
!= NULL
) );
106 * (Re)initialize the global circular LRU list. The last element
107 * in the array (\a heap->nrRegions) is the sentinal. Keeping it
108 * at the end of the array allows the other elements of the array
109 * to be addressed rationally when looking up objects at a particular
110 * location in texture memory.
112 * \param heap Texture heap to be reset
115 static void resetGlobalLRU( driTexHeap
* heap
)
117 drmTextureRegionPtr list
= heap
->global_regions
;
118 unsigned sz
= 1U << heap
->logGranularity
;
121 for (i
= 0 ; (i
+1) * sz
<= heap
->size
; i
++) {
128 list
[0].prev
= heap
->nrRegions
;
130 list
[i
].next
= heap
->nrRegions
;
131 list
[heap
->nrRegions
].prev
= i
;
132 list
[heap
->nrRegions
].next
= 0;
133 heap
->global_age
[0] = 0;
137 * Print out debugging information about the local texture LRU.
139 * \param heap Texture heap to be printed
140 * \param callername Name of calling function
142 static void printLocalLRU( driTexHeap
* heap
, const char *callername
)
145 unsigned sz
= 1U << heap
->logGranularity
;
147 fprintf( stderr
, "%s in %s:\nLocal LRU, heap %d:\n",
148 __FUNCTION__
, callername
, heap
->heapId
);
150 foreach ( t
, &heap
->texture_objects
) {
154 fprintf( stderr
, "Placeholder (%p) %d at 0x%x sz 0x%x\n",
156 t
->memBlock
->ofs
/ sz
,
160 fprintf( stderr
, "Texture (%p) at 0x%x sz 0x%x\n",
166 foreach ( t
, heap
->swapped_objects
) {
168 fprintf( stderr
, "Swapped Placeholder (%p)\n", (void *)t
);
170 fprintf( stderr
, "Swapped Texture (%p)\n", (void *)t
);
174 fprintf( stderr
, "\n" );
178 * Print out debugging information about the global texture LRU.
180 * \param heap Texture heap to be printed
181 * \param callername Name of calling function
183 static void printGlobalLRU( driTexHeap
* heap
, const char *callername
)
185 drmTextureRegionPtr list
= heap
->global_regions
;
188 fprintf( stderr
, "%s in %s:\nGlobal LRU, heap %d list %p:\n",
189 __FUNCTION__
, callername
, heap
->heapId
, (void *)list
);
191 for ( i
= 0, j
= heap
->nrRegions
; i
< heap
->nrRegions
; i
++ ) {
192 fprintf( stderr
, "list[%d] age %d next %d prev %d in_use %d\n",
193 j
, list
[j
].age
, list
[j
].next
, list
[j
].prev
, list
[j
].in_use
);
195 if ( j
== heap
->nrRegions
) break;
198 if ( j
!= heap
->nrRegions
) {
199 fprintf( stderr
, "Loop detected in global LRU\n" );
200 for ( i
= 0 ; i
< heap
->nrRegions
; i
++ ) {
201 fprintf( stderr
, "list[%d] age %d next %d prev %d in_use %d\n",
202 i
, list
[i
].age
, list
[i
].next
, list
[i
].prev
, list
[i
].in_use
);
206 fprintf( stderr
, "\n" );
211 * Called by the client whenever it touches a local texture.
213 * \param t Texture object that the client has accessed
216 void driUpdateTextureLRU( driTextureObject
* t
)
219 drmTextureRegionPtr list
;
227 if ( heap
!= NULL
) {
228 shift
= heap
->logGranularity
;
229 start
= t
->memBlock
->ofs
>> shift
;
230 end
= (t
->memBlock
->ofs
+ t
->memBlock
->size
- 1) >> shift
;
233 heap
->local_age
= ++heap
->global_age
[0];
234 list
= heap
->global_regions
;
237 /* Update the context's local LRU
240 move_to_head( & heap
->texture_objects
, t
);
243 for (i
= start
; i
<= end
; i
++) {
244 list
[i
].age
= heap
->local_age
;
246 /* remove_from_list(i)
248 list
[(unsigned)list
[i
].next
].prev
= list
[i
].prev
;
249 list
[(unsigned)list
[i
].prev
].next
= list
[i
].next
;
251 /* insert_at_head(list, i)
253 list
[i
].prev
= heap
->nrRegions
;
254 list
[i
].next
= list
[heap
->nrRegions
].next
;
255 list
[(unsigned)list
[heap
->nrRegions
].next
].prev
= i
;
256 list
[heap
->nrRegions
].next
= i
;
260 printGlobalLRU( heap
, __FUNCTION__
);
261 printLocalLRU( heap
, __FUNCTION__
);
270 * Keep track of swapped out texture objects.
272 * \param t Texture object to be "swapped" out of its texture heap
275 void driSwapOutTextureObject( driTextureObject
* t
)
280 if ( t
->memBlock
!= NULL
) {
281 assert( t
->heap
!= NULL
);
282 mmFreeMem( t
->memBlock
);
285 if (t
->timestamp
> t
->heap
->timestamp
)
286 t
->heap
->timestamp
= t
->timestamp
;
288 t
->heap
->texture_swaps
[0]++;
289 move_to_tail( t
->heap
->swapped_objects
, t
);
293 assert( t
->heap
== NULL
);
297 for ( face
= 0 ; face
< 6 ; face
++ ) {
298 t
->dirty_images
[face
] = ~0;
306 * Destroy hardware state associated with texture \a t. Calls the
307 * \a destroy_texture_object method associated with the heap from which
308 * \a t was allocated.
310 * \param t Texture object to be destroyed
313 void driDestroyTextureObject( driTextureObject
* t
)
319 fprintf( stderr
, "[%s:%d] freeing %p (tObj = %p, DriverData = %p)\n",
322 (void *)((t
!= NULL
) ? t
->tObj
: NULL
),
323 (void *)((t
!= NULL
&& t
->tObj
!= NULL
) ? t
->tObj
->DriverData
: NULL
));
329 assert( heap
!= NULL
);
331 heap
->texture_swaps
[0]++;
333 mmFreeMem( t
->memBlock
);
336 if (t
->timestamp
> t
->heap
->timestamp
)
337 t
->heap
->timestamp
= t
->timestamp
;
339 heap
->destroy_texture_object( heap
->driverContext
, t
);
343 if ( t
->tObj
!= NULL
) {
344 assert( t
->tObj
->DriverData
== t
);
345 t
->tObj
->DriverData
= NULL
;
348 remove_from_list( t
);
353 fprintf( stderr
, "[%s:%d] done freeing %p\n", __FILE__
, __LINE__
, (void *)t
);
361 * Update the local heap's representation of texture memory based on
362 * data in the SAREA. This is done each time it is detected that some other
363 * direct rendering client has held the lock. This pertains to both our local
364 * textures and the textures belonging to other clients. Keep track of other
365 * client's textures by pushing a placeholder texture onto the LRU list --
366 * these are denoted by \a tObj being \a NULL.
368 * \param heap Heap whose state is to be updated
369 * \param offset Byte offset in the heap that has been stolen
370 * \param size Size, in bytes, of the stolen block
371 * \param in_use Non-zero if the block is pinned/reserved by the kernel
374 static void driTexturesGone( driTexHeap
* heap
, int offset
, int size
,
377 driTextureObject
* t
;
378 driTextureObject
* tmp
;
381 foreach_s ( t
, tmp
, & heap
->texture_objects
) {
382 if ( (t
->memBlock
->ofs
< (offset
+ size
))
383 && ((t
->memBlock
->ofs
+ t
->memBlock
->size
) > offset
) ) {
384 /* It overlaps - kick it out. If the texture object is just a
385 * place holder, then destroy it all together. Otherwise, mark
386 * it as being swapped out.
389 if ( t
->tObj
!= NULL
) {
390 driSwapOutTextureObject( t
);
393 driDestroyTextureObject( t
);
400 t
= (driTextureObject
*) CALLOC( heap
->texture_object_size
);
401 if ( t
== NULL
) return;
403 t
->memBlock
= mmAllocMem( heap
->memory_heap
, size
, 0, offset
);
404 if ( t
->memBlock
== NULL
) {
405 fprintf( stderr
, "Couldn't alloc placeholder: heap %u sz %x ofs %x\n", heap
->heapId
,
406 (int)size
, (int)offset
);
407 mmDumpMemInfo( heap
->memory_heap
);
414 insert_at_head( & heap
->texture_objects
, t
);
422 * Called by the client on lock contention to determine whether textures have
423 * been stolen. If another client has modified a region in which we have
424 * textures, then we need to figure out which of our textures have been
425 * removed and update our global LRU.
427 * \param heap Texture heap to be updated
430 void driAgeTextures( driTexHeap
* heap
)
432 drmTextureRegionPtr list
= heap
->global_regions
;
433 unsigned sz
= 1U << (heap
->logGranularity
);
437 /* Have to go right round from the back to ensure stuff ends up
438 * LRU in the local list... Fix with a cursor pointer.
441 for (i
= list
[heap
->nrRegions
].prev
;
442 i
!= heap
->nrRegions
&& nr
< heap
->nrRegions
;
443 i
= list
[i
].prev
, nr
++) {
444 /* If switching texturing schemes, then the SAREA might not have been
445 * properly cleared, so we need to reset the global texture LRU.
448 if ( (i
* sz
) > heap
->size
) {
449 nr
= heap
->nrRegions
;
453 if (list
[i
].age
> heap
->local_age
)
454 driTexturesGone( heap
, i
* sz
, sz
, list
[i
].in_use
);
457 /* Loop or uninitialized heap detected. Reset.
460 if (nr
== heap
->nrRegions
) {
461 driTexturesGone( heap
, 0, heap
->size
, 0);
462 resetGlobalLRU( heap
);
466 printGlobalLRU( heap
, __FUNCTION__
);
467 printLocalLRU( heap
, __FUNCTION__
);
470 heap
->local_age
= heap
->global_age
[0];
476 #define INDEX_ARRAY_SIZE 6 /* I'm not aware of driver with more than 2 heaps */
479 * Allocate memory from a texture heap to hold a texture object. This
480 * routine will attempt to allocate memory for the texture from the heaps
481 * specified by \c heap_array in order. That is, first it will try to
482 * allocate from \c heap_array[0], then \c heap_array[1], and so on.
484 * \param heap_array Array of pointers to texture heaps to use
485 * \param nr_heaps Number of heap pointer in \a heap_array
486 * \param t Texture object for which space is needed
487 * \return The ID of the heap from which memory was allocated, or -1 if
488 * memory could not be allocated.
490 * \bug The replacement policy implemented by this function is horrible.
495 driAllocateTexture( driTexHeap
* const * heap_array
, unsigned nr_heaps
,
496 driTextureObject
* t
)
499 driTextureObject
* temp
;
500 driTextureObject
* cursor
;
504 /* In case it already has texture space, initialize heap. This also
505 * prevents GCC from issuing a warning that heap might be used
512 /* Run through each of the existing heaps and try to allocate a buffer
513 * to hold the texture.
516 for ( id
= 0 ; (t
->memBlock
== NULL
) && (id
< nr_heaps
) ; id
++ ) {
517 heap
= heap_array
[ id
];
518 if ( heap
!= NULL
) {
519 t
->memBlock
= mmAllocMem( heap
->memory_heap
, t
->totalSize
,
520 heap
->alignmentShift
, 0 );
525 /* Kick textures out until the requested texture fits.
528 if ( t
->memBlock
== NULL
) {
529 unsigned index
[INDEX_ARRAY_SIZE
];
530 unsigned nrGoodHeaps
= 0;
532 /* Trying to avoid dynamic memory allocation. If you have more
533 * heaps, increase INDEX_ARRAY_SIZE. I'm not aware of any
534 * drivers with more than 2 tex heaps. */
535 assert( nr_heaps
< INDEX_ARRAY_SIZE
);
537 /* Sort large enough heaps by duty. Insertion sort should be
538 * fast enough for such a short array. */
539 for ( id
= 0 ; id
< nr_heaps
; id
++ ) {
540 heap
= heap_array
[ id
];
542 if ( heap
!= NULL
&& t
->totalSize
<= heap
->size
) {
545 for ( j
= 0 ; j
< nrGoodHeaps
; j
++ ) {
546 if ( heap
->duty
> heap_array
[ index
[ j
] ]->duty
)
550 if ( j
< nrGoodHeaps
) {
551 memmove( &index
[ j
+1 ], &index
[ j
],
552 sizeof(index
[ 0 ]) * (nrGoodHeaps
- j
) );
561 for ( id
= 0 ; (t
->memBlock
== NULL
) && (id
< nrGoodHeaps
) ; id
++ ) {
562 heap
= heap_array
[ index
[ id
] ];
564 for ( cursor
= heap
->texture_objects
.prev
, temp
= cursor
->prev
;
565 cursor
!= &heap
->texture_objects
;
566 cursor
= temp
, temp
= cursor
->prev
) {
568 /* The the LRU element. If the texture is bound to one of
569 * the texture units, then we cannot kick it out.
571 if ( cursor
->bound
|| cursor
->reserved
) {
575 if ( cursor
->memBlock
)
576 heap
->duty
-= cursor
->memBlock
->size
;
578 /* If this is a placeholder, there's no need to keep it */
580 driSwapOutTextureObject( cursor
);
582 driDestroyTextureObject( cursor
);
584 t
->memBlock
= mmAllocMem( heap
->memory_heap
, t
->totalSize
,
585 heap
->alignmentShift
, 0 );
592 /* Rebalance duties. If a heap kicked more data than its duty,
593 * then all other heaps get that amount multiplied with their
594 * relative weight added to their duty. The negative duty is
595 * reset to 0. In the end all heaps have a duty >= 0.
597 * CAUTION: we must not change the heap pointer here, because it
598 * is used below to update the texture object.
600 for ( id
= 0 ; id
< nr_heaps
; id
++ )
601 if ( heap_array
[ id
] != NULL
&& heap_array
[ id
]->duty
< 0) {
602 int duty
= -heap_array
[ id
]->duty
;
603 double weight
= heap_array
[ id
]->weight
;
606 for ( j
= 0 ; j
< nr_heaps
; j
++ )
607 if ( j
!= id
&& heap_array
[ j
] != NULL
) {
608 heap_array
[ j
]->duty
+= (double) duty
*
609 heap_array
[ j
]->weight
/ weight
;
612 heap_array
[ id
]->duty
= 0;
617 if ( t
->memBlock
!= NULL
) {
618 /* id and heap->heapId may or may not be the same value here.
621 assert( heap
!= NULL
);
622 assert( (t
->heap
== NULL
) || (t
->heap
== heap
) );
628 assert( t
->heap
== NULL
);
630 fprintf( stderr
, "[%s:%d] unable to allocate texture\n",
631 __FUNCTION__
, __LINE__
);
642 * Set the location where the texture-swap counter is stored.
646 driSetTextureSwapCounterLocation( driTexHeap
* heap
, unsigned * counter
)
648 heap
->texture_swaps
= (counter
== NULL
) ? & dummy_swap_counter
: counter
;
655 * Create a new heap for texture data.
657 * \param heap_id Device-dependent heap identifier. This value
658 * will returned by driAllocateTexture when memory
659 * is allocated from this heap.
660 * \param context Device-dependent driver context. This is
661 * supplied as the first parameter to the
662 * \c destroy_tex_obj function.
663 * \param size Size, in bytes, of the texture region
664 * \param alignmentShift Alignment requirement for textures. If textures
665 * must be allocated on a 4096 byte boundry, this
667 * \param nr_regions Number of regions into which this texture space
668 * should be partitioned
669 * \param global_regions Array of \c drmTextureRegion structures in the SAREA
670 * \param global_age Pointer to the global texture age in the SAREA
671 * \param swapped_objects Pointer to the list of texture objects that are
672 * not in texture memory (i.e., have been swapped
674 * \param texture_object_size Size, in bytes, of a device-dependent texture
676 * \param destroy_tex_obj Function used to destroy a device-dependent
679 * \sa driDestroyTextureHeap
683 driCreateTextureHeap( unsigned heap_id
, void * context
, unsigned size
,
684 unsigned alignmentShift
, unsigned nr_regions
,
685 drmTextureRegionPtr global_regions
, unsigned * global_age
,
686 driTextureObject
* swapped_objects
,
687 unsigned texture_object_size
,
688 destroy_texture_object_t
* destroy_tex_obj
696 fprintf( stderr
, "%s( %u, %p, %u, %u, %u )\n",
698 heap_id
, (void *)context
, size
, alignmentShift
, nr_regions
);
700 heap
= (driTexHeap
*) CALLOC( sizeof( driTexHeap
) );
701 if ( heap
!= NULL
) {
702 l
= driLog2( (size
- 1) / nr_regions
);
703 if ( l
< alignmentShift
)
708 heap
->logGranularity
= l
;
709 heap
->size
= size
& ~((1L << l
) - 1);
711 heap
->memory_heap
= mmInit( 0, heap
->size
);
712 if ( heap
->memory_heap
!= NULL
) {
713 heap
->heapId
= heap_id
;
714 heap
->driverContext
= context
;
716 heap
->alignmentShift
= alignmentShift
;
717 heap
->nrRegions
= nr_regions
;
718 heap
->global_regions
= global_regions
;
719 heap
->global_age
= global_age
;
720 heap
->swapped_objects
= swapped_objects
;
721 heap
->texture_object_size
= texture_object_size
;
722 heap
->destroy_texture_object
= destroy_tex_obj
;
724 /* Force global heap init */
725 if (heap
->global_age
[0] == 0)
726 heap
->local_age
= ~0;
730 make_empty_list( & heap
->texture_objects
);
731 driSetTextureSwapCounterLocation( heap
, NULL
);
733 heap
->weight
= heap
->size
;
744 fprintf( stderr
, "%s returning %p\n", __FUNCTION__
, (void *)heap
);
752 /** Destroys a texture heap
754 * \param heap Texture heap to be destroyed
758 driDestroyTextureHeap( driTexHeap
* heap
)
760 driTextureObject
* t
;
761 driTextureObject
* temp
;
764 if ( heap
!= NULL
) {
765 foreach_s( t
, temp
, & heap
->texture_objects
) {
766 driDestroyTextureObject( t
);
768 foreach_s( t
, temp
, heap
->swapped_objects
) {
769 driDestroyTextureObject( t
);
772 mmDestroy( heap
->memory_heap
);
780 /****************************************************************************/
782 * Determine how many texels (including all mipmap levels) would be required
783 * for a texture map of size \f$2^^\c base_size_log2\f$ would require.
785 * \param base_size_log2 \f$log_2\f$ of the size of a side of the texture
786 * \param dimensions Number of dimensions of the texture. Either 2 or 3.
787 * \param faces Number of faces of the texture. Either 1 or 6 (for cube maps).
788 * \return Number of texels
792 texels_this_map_size( int base_size_log2
, unsigned dimensions
, unsigned faces
)
797 assert( (faces
== 1) || (faces
== 6) );
798 assert( (dimensions
== 2) || (dimensions
== 3) );
801 if ( base_size_log2
>= 0 ) {
802 texels
= (1U << (dimensions
* base_size_log2
));
804 /* See http://www.mail-archive.com/dri-devel@lists.sourceforge.net/msg03636.html
805 * for the complete explaination of why this formulation is used.
806 * Basically, the smaller mipmap levels sum to 0.333 the size of the
807 * level 0 map. The total size is therefore the size of the map
808 * multipled by 1.333. The +2 is there to round up.
811 texels
= (texels
* 4 * faces
+ 2) / 3;
820 struct maps_per_heap
{
825 fill_in_maximums( driTexHeap
* const * heaps
, unsigned nr_heaps
,
826 unsigned max_bytes_per_texel
, unsigned max_size
,
827 unsigned mipmaps_at_once
, unsigned dimensions
,
828 unsigned faces
, struct maps_per_heap
* max_textures
)
835 /* Determine how many textures of each size can be stored in each
839 for ( heap
= 0 ; heap
< nr_heaps
; heap
++ ) {
840 if ( heaps
[ heap
] == NULL
) {
841 (void) memset( max_textures
[ heap
].c
, 0,
842 sizeof( max_textures
[ heap
].c
) );
846 mask
= (1U << heaps
[ heap
]->logGranularity
) - 1;
849 fprintf( stderr
, "[%s:%d] heap[%u] = %u bytes, mask = 0x%08x\n",
851 heap
, heaps
[ heap
]->size
, mask
);
854 for ( log2_size
= max_size
; log2_size
> 0 ; log2_size
-- ) {
858 /* Determine the total number of bytes required by a texture of
862 total
= texels_this_map_size( log2_size
, dimensions
, faces
)
863 - texels_this_map_size( log2_size
- mipmaps_at_once
,
865 total
*= max_bytes_per_texel
;
866 total
= (total
+ mask
) & ~mask
;
868 /* The number of textures of a given size that will fit in a heap
869 * is equal to the size of the heap divided by the size of the
873 max_textures
[ heap
].c
[ log2_size
] = heaps
[ heap
]->size
/ total
;
876 fprintf( stderr
, "[%s:%d] max_textures[%u].c[%02u] "
881 heaps
[ heap
]->size
, total
,
882 heaps
[ heap
]->size
/ total
,
883 max_textures
[ heap
].c
[ log2_size
] );
891 get_max_size( unsigned nr_heaps
,
892 unsigned texture_units
,
894 int all_textures_one_heap
,
895 struct maps_per_heap
* max_textures
)
901 /* Determine the largest texture size such that a texture of that size
902 * can be bound to each texture unit at the same time. Some hardware
903 * may require that all textures be in the same texture heap for
907 for ( log2_size
= max_size
; log2_size
> 0 ; log2_size
-- ) {
910 for ( heap
= 0 ; heap
< nr_heaps
; heap
++ )
912 total
+= max_textures
[ heap
].c
[ log2_size
];
915 fprintf( stderr
, "[%s:%d] max_textures[%u].c[%02u] = %u, "
916 "total = %u\n", __FILE__
, __LINE__
, heap
, log2_size
,
917 max_textures
[ heap
].c
[ log2_size
], total
);
920 if ( (max_textures
[ heap
].c
[ log2_size
] >= texture_units
)
921 || (!all_textures_one_heap
&& (total
>= texture_units
)) ) {
922 /* The number of mipmap levels is the log-base-2 of the
923 * maximum texture size plus 1. If the maximum texture size
924 * is 1x1, the log-base-2 is 0 and 1 mipmap level (the base
925 * level) is available.
928 return log2_size
+ 1;
933 /* This should NEVER happen. It should always be possible to have at
934 * *least* a 1x1 texture in memory!
936 assert( log2_size
!= 0 );
940 #define SET_MAX(f,v) \
941 do { if ( max_sizes[v] != 0 ) { limits-> f = max_sizes[v]; } } while( 0 )
943 #define SET_MAX_RECT(f,v) \
944 do { if ( max_sizes[v] != 0 ) { limits-> f = 1 << (max_sizes[v] - 1); } } while( 0 )
948 * Given the amount of texture memory, the number of texture units, and the
949 * maximum size of a texel, calculate the maximum texture size the driver can
952 * \param heaps Texture heaps for this card
953 * \param nr_heap Number of texture heaps
954 * \param limits OpenGL contants. MaxTextureUnits must be set.
955 * \param max_bytes_per_texel Maximum size of a single texel, in bytes
956 * \param max_2D_size \f$\log_2\f$ of the maximum 2D texture size (i.e.,
957 * 1024x1024 textures, this would be 10)
958 * \param max_3D_size \f$\log_2\f$ of the maximum 3D texture size (i.e.,
959 * 1024x1024x1024 textures, this would be 10)
960 * \param max_cube_size \f$\log_2\f$ of the maximum cube texture size (i.e.,
961 * 1024x1024 textures, this would be 10)
962 * \param max_rect_size \f$\log_2\f$ of the maximum texture rectangle size
963 * (i.e., 1024x1024 textures, this would be 10). This is a power-of-2
964 * even though texture rectangles need not be a power-of-2.
965 * \param mipmaps_at_once Total number of mipmaps that can be used
966 * at one time. For most hardware this will be \f$\c max_size + 1\f$.
967 * For hardware that does not support mipmapping, this will be 1.
968 * \param all_textures_one_heap True if the hardware requires that all
969 * textures be in a single texture heap for multitexturing.
970 * \param allow_larger_textures 0 conservative, 1 calculate limits
971 * so at least one worst-case texture can fit, 2 just use hw limits.
975 driCalculateMaxTextureLevels( driTexHeap
* const * heaps
,
977 struct gl_constants
* limits
,
978 unsigned max_bytes_per_texel
,
979 unsigned max_2D_size
,
980 unsigned max_3D_size
,
981 unsigned max_cube_size
,
982 unsigned max_rect_size
,
983 unsigned mipmaps_at_once
,
984 int all_textures_one_heap
,
985 int allow_larger_textures
)
987 struct maps_per_heap max_textures
[8];
989 const unsigned dimensions
[4] = { 2, 3, 2, 2 };
990 const unsigned faces
[4] = { 1, 1, 6, 1 };
991 unsigned max_sizes
[4];
995 max_sizes
[0] = max_2D_size
;
996 max_sizes
[1] = max_3D_size
;
997 max_sizes
[2] = max_cube_size
;
998 max_sizes
[3] = max_rect_size
;
1000 mipmaps
[0] = mipmaps_at_once
;
1001 mipmaps
[1] = mipmaps_at_once
;
1002 mipmaps
[2] = mipmaps_at_once
;
1006 /* Calculate the maximum number of texture levels in two passes. The
1007 * first pass determines how many textures of each power-of-two size
1008 * (including all mipmap levels for that size) can fit in each texture
1009 * heap. The second pass finds the largest texture size that allows
1010 * a texture of that size to be bound to every texture unit.
1013 for ( i
= 0 ; i
< 4 ; i
++ ) {
1014 if ( (allow_larger_textures
!= 2) && (max_sizes
[ i
] != 0) ) {
1015 fill_in_maximums( heaps
, nr_heaps
, max_bytes_per_texel
,
1016 max_sizes
[ i
], mipmaps
[ i
],
1017 dimensions
[ i
], faces
[ i
],
1020 max_sizes
[ i
] = get_max_size( nr_heaps
,
1021 allow_larger_textures
== 1 ?
1022 1 : limits
->MaxTextureUnits
,
1024 all_textures_one_heap
,
1027 else if (max_sizes
[ i
] != 0) {
1028 max_sizes
[ i
] += 1;
1032 SET_MAX( MaxTextureLevels
, 0 );
1033 SET_MAX( Max3DTextureLevels
, 1 );
1034 SET_MAX( MaxCubeTextureLevels
, 2 );
1035 SET_MAX_RECT( MaxTextureRectSize
, 3 );
1042 * Perform initial binding of default textures objects on a per unit, per
1043 * texture target basis.
1045 * \param ctx Current OpenGL context
1046 * \param swapped List of swapped-out textures
1047 * \param targets Bit-mask of value texture targets
1050 void driInitTextureObjects( struct gl_context
*ctx
, driTextureObject
* swapped
,
1053 struct gl_texture_object
*texObj
;
1054 GLuint tmp
= ctx
->Texture
.CurrentUnit
;
1058 for ( i
= 0 ; i
< ctx
->Const
.MaxTextureUnits
; i
++ ) {
1059 ctx
->Texture
.CurrentUnit
= i
;
1061 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_1D
) != 0 ) {
1062 texObj
= ctx
->Texture
.Unit
[i
].CurrentTex
[TEXTURE_1D_INDEX
];
1063 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_1D
, texObj
);
1064 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1067 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_2D
) != 0 ) {
1068 texObj
= ctx
->Texture
.Unit
[i
].CurrentTex
[TEXTURE_2D_INDEX
];
1069 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_2D
, texObj
);
1070 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1073 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_3D
) != 0 ) {
1074 texObj
= ctx
->Texture
.Unit
[i
].CurrentTex
[TEXTURE_3D_INDEX
];
1075 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_3D
, texObj
);
1076 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1079 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_CUBE
) != 0 ) {
1080 texObj
= ctx
->Texture
.Unit
[i
].CurrentTex
[TEXTURE_CUBE_INDEX
];
1081 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_CUBE_MAP_ARB
, texObj
);
1082 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1085 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_RECT
) != 0 ) {
1086 texObj
= ctx
->Texture
.Unit
[i
].CurrentTex
[TEXTURE_RECT_INDEX
];
1087 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_RECTANGLE_NV
, texObj
);
1088 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1092 ctx
->Texture
.CurrentUnit
= tmp
;
1099 * Verify that the specified texture is in the specificed heap.
1101 * \param tex Texture to be tested.
1102 * \param heap Texture memory heap to be tested.
1103 * \return True if the texture is in the heap, false otherwise.
1107 check_in_heap( const driTextureObject
* tex
, const driTexHeap
* heap
)
1110 return tex
->heap
== heap
;
1112 driTextureObject
* curr
;
1114 foreach( curr
, & heap
->texture_objects
) {
1115 if ( curr
== tex
) {
1126 /****************************************************************************/
1128 * Validate the consistency of a set of texture heaps.
1129 * Original version by Keith Whitwell in r200/r200_sanity.c.
1133 driValidateTextureHeaps( driTexHeap
* const * texture_heaps
,
1134 unsigned nr_heaps
, const driTextureObject
* swapped
)
1136 driTextureObject
*t
;
1139 for ( i
= 0 ; i
< nr_heaps
; i
++ ) {
1141 unsigned textures_in_heap
= 0;
1142 unsigned blocks_in_mempool
= 0;
1143 const driTexHeap
* heap
= texture_heaps
[i
];
1144 const struct mem_block
*p
= heap
->memory_heap
;
1146 /* Check each texture object has a MemBlock, and is linked into
1149 * Check the texobj base address corresponds to the MemBlock
1150 * range. Check the texobj size (recalculate?) fits within
1153 * Count the number of texobj's using this heap.
1156 foreach ( t
, &heap
->texture_objects
) {
1157 if ( !check_in_heap( t
, heap
) ) {
1158 fprintf( stderr
, "%s memory block for texture object @ %p not "
1159 "found in heap #%d\n",
1160 __FUNCTION__
, (void *)t
, i
);
1165 if ( t
->totalSize
> t
->memBlock
->size
) {
1166 fprintf( stderr
, "%s: Memory block for texture object @ %p is "
1167 "only %u bytes, but %u are required\n",
1168 __FUNCTION__
, (void *)t
, t
->totalSize
, t
->memBlock
->size
);
1175 /* Validate the contents of the heap:
1181 while ( p
!= NULL
) {
1183 fprintf( stderr
, "%s: Block (%08x,%x), is reserved?!\n",
1184 __FUNCTION__
, p
->ofs
, p
->size
);
1188 if (p
->ofs
!= last_end
) {
1189 fprintf( stderr
, "%s: blocks_in_mempool = %d, last_end = %d, p->ofs = %d\n",
1190 __FUNCTION__
, blocks_in_mempool
, last_end
, p
->ofs
);
1194 if (!p
->reserved
&& !p
->free
) {
1195 blocks_in_mempool
++;
1198 last_end
= p
->ofs
+ p
->size
;
1202 if (textures_in_heap
!= blocks_in_mempool
) {
1203 fprintf( stderr
, "%s: Different number of textures objects (%u) and "
1204 "inuse memory blocks (%u)\n",
1205 __FUNCTION__
, textures_in_heap
, blocks_in_mempool
);
1210 fprintf( stderr
, "%s: textures_in_heap = %u\n",
1211 __FUNCTION__
, textures_in_heap
);
1216 /* Check swapped texobj's have zero memblocks
1219 foreach ( t
, swapped
) {
1220 if ( t
->memBlock
!= NULL
) {
1221 fprintf( stderr
, "%s: Swapped texobj %p has non-NULL memblock %p\n",
1222 __FUNCTION__
, (void *)t
, (void *)t
->memBlock
);
1229 fprintf( stderr
, "%s: swapped texture count = %u\n", __FUNCTION__
, i
);
1238 /****************************************************************************/
1240 * Compute which mipmap levels that really need to be sent to the hardware.
1241 * This depends on the base image size, GL_TEXTURE_MIN_LOD,
1242 * GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, and GL_TEXTURE_MAX_LEVEL.
1246 driCalculateTextureFirstLastLevel( driTextureObject
* t
)
1248 struct gl_texture_object
* const tObj
= t
->tObj
;
1249 const struct gl_texture_image
* const baseImage
=
1250 tObj
->Image
[0][tObj
->BaseLevel
];
1252 /* These must be signed values. MinLod and MaxLod can be negative numbers,
1253 * and having firstLevel and lastLevel as signed prevents the need for
1254 * extra sign checks.
1259 /* Yes, this looks overly complicated, but it's all needed.
1262 switch (tObj
->Target
) {
1266 case GL_TEXTURE_CUBE_MAP
:
1267 if (tObj
->MinFilter
== GL_NEAREST
|| tObj
->MinFilter
== GL_LINEAR
) {
1268 /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
1271 firstLevel
= lastLevel
= tObj
->BaseLevel
;
1274 firstLevel
= tObj
->BaseLevel
+ (GLint
)(tObj
->MinLod
+ 0.5);
1275 firstLevel
= MAX2(firstLevel
, tObj
->BaseLevel
);
1276 firstLevel
= MIN2(firstLevel
, tObj
->BaseLevel
+ baseImage
->MaxLog2
);
1277 lastLevel
= tObj
->BaseLevel
+ (GLint
)(tObj
->MaxLod
+ 0.5);
1278 lastLevel
= MAX2(lastLevel
, t
->tObj
->BaseLevel
);
1279 lastLevel
= MIN2(lastLevel
, t
->tObj
->BaseLevel
+ baseImage
->MaxLog2
);
1280 lastLevel
= MIN2(lastLevel
, t
->tObj
->MaxLevel
);
1281 lastLevel
= MAX2(firstLevel
, lastLevel
); /* need at least one level */
1284 case GL_TEXTURE_RECTANGLE_NV
:
1285 case GL_TEXTURE_4D_SGIS
:
1286 firstLevel
= lastLevel
= 0;
1292 /* save these values */
1293 t
->firstLevel
= firstLevel
;
1294 t
->lastLevel
= lastLevel
;
1301 * \name DRI texture formats. These vars are initialized to either the
1302 * big- or little-endian Mesa formats.
1305 gl_format _dri_texformat_rgba8888
= MESA_FORMAT_NONE
;
1306 gl_format _dri_texformat_argb8888
= MESA_FORMAT_NONE
;
1307 gl_format _dri_texformat_rgb565
= MESA_FORMAT_NONE
;
1308 gl_format _dri_texformat_argb4444
= MESA_FORMAT_NONE
;
1309 gl_format _dri_texformat_argb1555
= MESA_FORMAT_NONE
;
1310 gl_format _dri_texformat_al88
= MESA_FORMAT_NONE
;
1311 gl_format _dri_texformat_a8
= MESA_FORMAT_A8
;
1312 gl_format _dri_texformat_ci8
= MESA_FORMAT_CI8
;
1313 gl_format _dri_texformat_i8
= MESA_FORMAT_I8
;
1314 gl_format _dri_texformat_l8
= MESA_FORMAT_L8
;
1319 * Initialize _dri_texformat_* vars according to whether we're on
1320 * a big or little endian system.
1323 driInitTextureFormats(void)
1325 if (_mesa_little_endian()) {
1326 _dri_texformat_rgba8888
= MESA_FORMAT_RGBA8888
;
1327 _dri_texformat_argb8888
= MESA_FORMAT_ARGB8888
;
1328 _dri_texformat_rgb565
= MESA_FORMAT_RGB565
;
1329 _dri_texformat_argb4444
= MESA_FORMAT_ARGB4444
;
1330 _dri_texformat_argb1555
= MESA_FORMAT_ARGB1555
;
1331 _dri_texformat_al88
= MESA_FORMAT_AL88
;
1334 _dri_texformat_rgba8888
= MESA_FORMAT_RGBA8888_REV
;
1335 _dri_texformat_argb8888
= MESA_FORMAT_ARGB8888_REV
;
1336 _dri_texformat_rgb565
= MESA_FORMAT_RGB565_REV
;
1337 _dri_texformat_argb4444
= MESA_FORMAT_ARGB4444_REV
;
1338 _dri_texformat_argb1555
= MESA_FORMAT_ARGB1555_REV
;
1339 _dri_texformat_al88
= MESA_FORMAT_AL88_REV
;