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>
34 * Implements all of the device-independent texture memory management.
36 * Currently, only a simple LRU texture memory management policy is
37 * implemented. In the (hopefully very near) future, better policies will be
38 * implemented. The idea is that the DRI should be able to run in one of two
39 * modes. In the default mode the DRI will dynamically attempt to discover
40 * the best texture management policy for the running application. In the
41 * other mode, the user (via some sort of as yet TBD mechanism) will select
42 * a texture management policy that is known to work well with the
47 #include "simple_list.h"
50 #include "texformat.h"
56 static unsigned dummy_swap_counter
;
60 * Calculate \f$\log_2\f$ of a value. This is a particularly poor
61 * implementation of this function. However, since system performance is in
62 * no way dependent on this function, the slowness of the implementation is
65 * \param n Value whose \f$\log_2\f$ is to be calculated
73 for ( log2
= 1 ; n
> 1 ; log2
++ ) {
84 * Determine if a texture is resident in textureable memory. Depending on
85 * the driver, this may or may not be on-card memory. It could be AGP memory
86 * or anyother type of memory from which the hardware can directly read
89 * This function is intended to be used as the \c IsTextureResident function
90 * in the device's \c dd_function_table.
92 * \param ctx GL context pointer (currently unused)
93 * \param texObj Texture object to be tested
97 driIsTextureResident( GLcontext
* ctx
,
98 struct gl_texture_object
* texObj
)
100 driTextureObject
* t
;
103 t
= (driTextureObject
*) texObj
->DriverData
;
104 return( (t
!= NULL
) && (t
->memBlock
!= NULL
) );
111 * (Re)initialize the global circular LRU list. The last element
112 * in the array (\a heap->nrRegions) is the sentinal. Keeping it
113 * at the end of the array allows the other elements of the array
114 * to be addressed rationally when looking up objects at a particular
115 * location in texture memory.
117 * \param heap Texture heap to be reset
120 static void resetGlobalLRU( driTexHeap
* heap
)
122 drmTextureRegionPtr list
= heap
->global_regions
;
123 unsigned sz
= 1U << heap
->logGranularity
;
126 for (i
= 0 ; (i
+1) * sz
<= heap
->size
; i
++) {
133 list
[0].prev
= heap
->nrRegions
;
135 list
[i
].next
= heap
->nrRegions
;
136 list
[heap
->nrRegions
].prev
= i
;
137 list
[heap
->nrRegions
].next
= 0;
138 heap
->global_age
[0] = 0;
142 * Print out debugging information about the local texture LRU.
144 * \param heap Texture heap to be printed
145 * \param callername Name of calling function
147 static void printLocalLRU( driTexHeap
* heap
, const char *callername
)
150 unsigned sz
= 1U << heap
->logGranularity
;
152 fprintf( stderr
, "%s in %s:\nLocal LRU, heap %d:\n",
153 __FUNCTION__
, callername
, heap
->heapId
);
155 foreach ( t
, &heap
->texture_objects
) {
159 fprintf( stderr
, "Placeholder (%p) %d at 0x%x sz 0x%x\n",
161 t
->memBlock
->ofs
/ sz
,
165 fprintf( stderr
, "Texture (%p) at 0x%x sz 0x%x\n",
171 foreach ( t
, heap
->swapped_objects
) {
173 fprintf( stderr
, "Swapped Placeholder (%p)\n", (void *)t
);
175 fprintf( stderr
, "Swapped Texture (%p)\n", (void *)t
);
179 fprintf( stderr
, "\n" );
183 * Print out debugging information about the global texture LRU.
185 * \param heap Texture heap to be printed
186 * \param callername Name of calling function
188 static void printGlobalLRU( driTexHeap
* heap
, const char *callername
)
190 drmTextureRegionPtr list
= heap
->global_regions
;
193 fprintf( stderr
, "%s in %s:\nGlobal LRU, heap %d list %p:\n",
194 __FUNCTION__
, callername
, heap
->heapId
, (void *)list
);
196 for ( i
= 0, j
= heap
->nrRegions
; i
< heap
->nrRegions
; i
++ ) {
197 fprintf( stderr
, "list[%d] age %d next %d prev %d in_use %d\n",
198 j
, list
[j
].age
, list
[j
].next
, list
[j
].prev
, list
[j
].in_use
);
200 if ( j
== heap
->nrRegions
) break;
203 if ( j
!= heap
->nrRegions
) {
204 fprintf( stderr
, "Loop detected in global LRU\n" );
205 for ( i
= 0 ; i
< heap
->nrRegions
; i
++ ) {
206 fprintf( stderr
, "list[%d] age %d next %d prev %d in_use %d\n",
207 i
, list
[i
].age
, list
[i
].next
, list
[i
].prev
, list
[i
].in_use
);
211 fprintf( stderr
, "\n" );
216 * Called by the client whenever it touches a local texture.
218 * \param t Texture object that the client has accessed
221 void driUpdateTextureLRU( driTextureObject
* t
)
224 drmTextureRegionPtr list
;
232 if ( heap
!= NULL
) {
233 shift
= heap
->logGranularity
;
234 start
= t
->memBlock
->ofs
>> shift
;
235 end
= (t
->memBlock
->ofs
+ t
->memBlock
->size
- 1) >> shift
;
238 heap
->local_age
= ++heap
->global_age
[0];
239 list
= heap
->global_regions
;
242 /* Update the context's local LRU
245 move_to_head( & heap
->texture_objects
, t
);
248 for (i
= start
; i
<= end
; i
++) {
249 list
[i
].age
= heap
->local_age
;
251 /* remove_from_list(i)
253 list
[(unsigned)list
[i
].next
].prev
= list
[i
].prev
;
254 list
[(unsigned)list
[i
].prev
].next
= list
[i
].next
;
256 /* insert_at_head(list, i)
258 list
[i
].prev
= heap
->nrRegions
;
259 list
[i
].next
= list
[heap
->nrRegions
].next
;
260 list
[(unsigned)list
[heap
->nrRegions
].next
].prev
= i
;
261 list
[heap
->nrRegions
].next
= i
;
265 printGlobalLRU( heap
, __FUNCTION__
);
266 printLocalLRU( heap
, __FUNCTION__
);
275 * Keep track of swapped out texture objects.
277 * \param t Texture object to be "swapped" out of its texture heap
280 void driSwapOutTextureObject( driTextureObject
* t
)
285 if ( t
->memBlock
!= NULL
) {
286 assert( t
->heap
!= NULL
);
287 mmFreeMem( t
->memBlock
);
290 if (t
->timestamp
> t
->heap
->timestamp
)
291 t
->heap
->timestamp
= t
->timestamp
;
293 t
->heap
->texture_swaps
[0]++;
294 move_to_tail( t
->heap
->swapped_objects
, t
);
298 assert( t
->heap
== NULL
);
302 for ( face
= 0 ; face
< 6 ; face
++ ) {
303 t
->dirty_images
[face
] = ~0;
311 * Destroy hardware state associated with texture \a t. Calls the
312 * \a destroy_texture_object method associated with the heap from which
313 * \a t was allocated.
315 * \param t Texture object to be destroyed
318 void driDestroyTextureObject( driTextureObject
* t
)
324 fprintf( stderr
, "[%s:%d] freeing %p (tObj = %p, DriverData = %p)\n",
327 (void *)((t
!= NULL
) ? t
->tObj
: NULL
),
328 (void *)((t
!= NULL
&& t
->tObj
!= NULL
) ? t
->tObj
->DriverData
: NULL
));
334 assert( heap
!= NULL
);
336 heap
->texture_swaps
[0]++;
338 mmFreeMem( t
->memBlock
);
341 if (t
->timestamp
> t
->heap
->timestamp
)
342 t
->heap
->timestamp
= t
->timestamp
;
344 heap
->destroy_texture_object( heap
->driverContext
, t
);
348 if ( t
->tObj
!= NULL
) {
349 assert( t
->tObj
->DriverData
== t
);
350 t
->tObj
->DriverData
= NULL
;
353 remove_from_list( t
);
358 fprintf( stderr
, "[%s:%d] done freeing %p\n", __FILE__
, __LINE__
, (void *)t
);
366 * Update the local heap's representation of texture memory based on
367 * data in the SAREA. This is done each time it is detected that some other
368 * direct rendering client has held the lock. This pertains to both our local
369 * textures and the textures belonging to other clients. Keep track of other
370 * client's textures by pushing a placeholder texture onto the LRU list --
371 * these are denoted by \a tObj being \a NULL.
373 * \param heap Heap whose state is to be updated
374 * \param offset Byte offset in the heap that has been stolen
375 * \param size Size, in bytes, of the stolen block
376 * \param in_use Non-zero if the block is pinned/reserved by the kernel
379 static void driTexturesGone( driTexHeap
* heap
, int offset
, int size
,
382 driTextureObject
* t
;
383 driTextureObject
* tmp
;
386 foreach_s ( t
, tmp
, & heap
->texture_objects
) {
387 if ( (t
->memBlock
->ofs
< (offset
+ size
))
388 && ((t
->memBlock
->ofs
+ t
->memBlock
->size
) > offset
) ) {
389 /* It overlaps - kick it out. If the texture object is just a
390 * place holder, then destroy it all together. Otherwise, mark
391 * it as being swapped out.
394 if ( t
->tObj
!= NULL
) {
395 driSwapOutTextureObject( t
);
398 driDestroyTextureObject( t
);
405 t
= (driTextureObject
*) CALLOC( heap
->texture_object_size
);
406 if ( t
== NULL
) return;
408 t
->memBlock
= mmAllocMem( heap
->memory_heap
, size
, 0, offset
);
409 if ( t
->memBlock
== NULL
) {
410 fprintf( stderr
, "Couldn't alloc placeholder: heap %u sz %x ofs %x\n", heap
->heapId
,
411 (int)size
, (int)offset
);
412 mmDumpMemInfo( heap
->memory_heap
);
418 insert_at_head( & heap
->texture_objects
, t
);
426 * Called by the client on lock contention to determine whether textures have
427 * been stolen. If another client has modified a region in which we have
428 * textures, then we need to figure out which of our textures have been
429 * removed and update our global LRU.
431 * \param heap Texture heap to be updated
434 void driAgeTextures( driTexHeap
* heap
)
436 drmTextureRegionPtr list
= heap
->global_regions
;
437 unsigned sz
= 1U << (heap
->logGranularity
);
441 /* Have to go right round from the back to ensure stuff ends up
442 * LRU in the local list... Fix with a cursor pointer.
445 for (i
= list
[heap
->nrRegions
].prev
;
446 i
!= heap
->nrRegions
&& nr
< heap
->nrRegions
;
447 i
= list
[i
].prev
, nr
++) {
448 /* If switching texturing schemes, then the SAREA might not have been
449 * properly cleared, so we need to reset the global texture LRU.
452 if ( (i
* sz
) > heap
->size
) {
453 nr
= heap
->nrRegions
;
457 if (list
[i
].age
> heap
->local_age
)
458 driTexturesGone( heap
, i
* sz
, sz
, list
[i
].in_use
);
461 /* Loop or uninitialized heap detected. Reset.
464 if (nr
== heap
->nrRegions
) {
465 driTexturesGone( heap
, 0, heap
->size
, 0);
466 resetGlobalLRU( heap
);
470 printGlobalLRU( heap
, __FUNCTION__
);
471 printLocalLRU( heap
, __FUNCTION__
);
474 heap
->local_age
= heap
->global_age
[0];
480 #define INDEX_ARRAY_SIZE 6 /* I'm not aware of driver with more than 2 heaps */
483 * Allocate memory from a texture heap to hold a texture object. This
484 * routine will attempt to allocate memory for the texture from the heaps
485 * specified by \c heap_array in order. That is, first it will try to
486 * allocate from \c heap_array[0], then \c heap_array[1], and so on.
488 * \param heap_array Array of pointers to texture heaps to use
489 * \param nr_heaps Number of heap pointer in \a heap_array
490 * \param t Texture object for which space is needed
491 * \return The ID of the heap from which memory was allocated, or -1 if
492 * memory could not be allocated.
494 * \bug The replacement policy implemented by this function is horrible.
499 driAllocateTexture( driTexHeap
* const * heap_array
, unsigned nr_heaps
,
500 driTextureObject
* t
)
503 driTextureObject
* temp
;
504 driTextureObject
* cursor
;
508 /* In case it already has texture space, initialize heap. This also
509 * prevents GCC from issuing a warning that heap might be used
516 /* Run through each of the existing heaps and try to allocate a buffer
517 * to hold the texture.
520 for ( id
= 0 ; (t
->memBlock
== NULL
) && (id
< nr_heaps
) ; id
++ ) {
521 heap
= heap_array
[ id
];
522 if ( heap
!= NULL
) {
523 t
->memBlock
= mmAllocMem( heap
->memory_heap
, t
->totalSize
,
524 heap
->alignmentShift
, 0 );
529 /* Kick textures out until the requested texture fits.
532 if ( t
->memBlock
== NULL
) {
533 unsigned index
[INDEX_ARRAY_SIZE
];
534 unsigned nrGoodHeaps
= 0;
536 /* Trying to avoid dynamic memory allocation. If you have more
537 * heaps, increase INDEX_ARRAY_SIZE. I'm not aware of any
538 * drivers with more than 2 tex heaps. */
539 assert( nr_heaps
< INDEX_ARRAY_SIZE
);
541 /* Sort large enough heaps by duty. Insertion sort should be
542 * fast enough for such a short array. */
543 for ( id
= 0 ; id
< nr_heaps
; id
++ ) {
544 heap
= heap_array
[ id
];
546 if ( heap
!= NULL
&& t
->totalSize
<= heap
->size
) {
549 for ( j
= 0 ; j
< nrGoodHeaps
; j
++ ) {
550 if ( heap
->duty
> heap_array
[ index
[ j
] ]->duty
)
554 if ( j
< nrGoodHeaps
) {
555 memmove( &index
[ j
+1 ], &index
[ j
],
556 sizeof(index
[ 0 ]) * (nrGoodHeaps
- j
) );
565 for ( id
= 0 ; (t
->memBlock
== NULL
) && (id
< nrGoodHeaps
) ; id
++ ) {
566 heap
= heap_array
[ index
[ id
] ];
568 for ( cursor
= heap
->texture_objects
.prev
, temp
= cursor
->prev
;
569 cursor
!= &heap
->texture_objects
;
570 cursor
= temp
, temp
= cursor
->prev
) {
572 /* The the LRU element. If the texture is bound to one of
573 * the texture units, then we cannot kick it out.
575 if ( cursor
->bound
|| cursor
->reserved
) {
579 if ( cursor
->memBlock
)
580 heap
->duty
-= cursor
->memBlock
->size
;
582 /* If this is a placeholder, there's no need to keep it */
584 driSwapOutTextureObject( cursor
);
586 driDestroyTextureObject( cursor
);
588 t
->memBlock
= mmAllocMem( heap
->memory_heap
, t
->totalSize
,
589 heap
->alignmentShift
, 0 );
596 /* Rebalance duties. If a heap kicked more data than its duty,
597 * then all other heaps get that amount multiplied with their
598 * relative weight added to their duty. The negative duty is
599 * reset to 0. In the end all heaps have a duty >= 0.
601 * CAUTION: we must not change the heap pointer here, because it
602 * is used below to update the texture object.
604 for ( id
= 0 ; id
< nr_heaps
; id
++ )
605 if ( heap_array
[ id
] != NULL
&& heap_array
[ id
]->duty
< 0) {
606 int duty
= -heap_array
[ id
]->duty
;
607 double weight
= heap_array
[ id
]->weight
;
610 for ( j
= 0 ; j
< nr_heaps
; j
++ )
611 if ( j
!= id
&& heap_array
[ j
] != NULL
) {
612 heap_array
[ j
]->duty
+= (double) duty
*
613 heap_array
[ j
]->weight
/ weight
;
616 heap_array
[ id
]->duty
= 0;
621 if ( t
->memBlock
!= NULL
) {
622 /* id and heap->heapId may or may not be the same value here.
625 assert( heap
!= NULL
);
626 assert( (t
->heap
== NULL
) || (t
->heap
== heap
) );
632 assert( t
->heap
== NULL
);
634 fprintf( stderr
, "[%s:%d] unable to allocate texture\n",
635 __FUNCTION__
, __LINE__
);
646 * Set the location where the texture-swap counter is stored.
650 driSetTextureSwapCounterLocation( driTexHeap
* heap
, unsigned * counter
)
652 heap
->texture_swaps
= (counter
== NULL
) ? & dummy_swap_counter
: counter
;
659 * Create a new heap for texture data.
661 * \param heap_id Device-dependent heap identifier. This value
662 * will returned by driAllocateTexture when memory
663 * is allocated from this heap.
664 * \param context Device-dependent driver context. This is
665 * supplied as the first parameter to the
666 * \c destroy_tex_obj function.
667 * \param size Size, in bytes, of the texture region
668 * \param alignmentShift Alignment requirement for textures. If textures
669 * must be allocated on a 4096 byte boundry, this
671 * \param nr_regions Number of regions into which this texture space
672 * should be partitioned
673 * \param global_regions Array of \c drmTextureRegion structures in the SAREA
674 * \param global_age Pointer to the global texture age in the SAREA
675 * \param swapped_objects Pointer to the list of texture objects that are
676 * not in texture memory (i.e., have been swapped
678 * \param texture_object_size Size, in bytes, of a device-dependent texture
680 * \param destroy_tex_obj Function used to destroy a device-dependent
683 * \sa driDestroyTextureHeap
687 driCreateTextureHeap( unsigned heap_id
, void * context
, unsigned size
,
688 unsigned alignmentShift
, unsigned nr_regions
,
689 drmTextureRegionPtr global_regions
, unsigned * global_age
,
690 driTextureObject
* swapped_objects
,
691 unsigned texture_object_size
,
692 destroy_texture_object_t
* destroy_tex_obj
700 fprintf( stderr
, "%s( %u, %p, %u, %u, %u )\n",
702 heap_id
, (void *)context
, size
, alignmentShift
, nr_regions
);
704 heap
= (driTexHeap
*) CALLOC( sizeof( driTexHeap
) );
705 if ( heap
!= NULL
) {
706 l
= driLog2( (size
- 1) / nr_regions
);
707 if ( l
< alignmentShift
)
712 heap
->logGranularity
= l
;
713 heap
->size
= size
& ~((1L << l
) - 1);
715 heap
->memory_heap
= mmInit( 0, heap
->size
);
716 if ( heap
->memory_heap
!= NULL
) {
717 heap
->heapId
= heap_id
;
718 heap
->driverContext
= context
;
720 heap
->alignmentShift
= alignmentShift
;
721 heap
->nrRegions
= nr_regions
;
722 heap
->global_regions
= global_regions
;
723 heap
->global_age
= global_age
;
724 heap
->swapped_objects
= swapped_objects
;
725 heap
->texture_object_size
= texture_object_size
;
726 heap
->destroy_texture_object
= destroy_tex_obj
;
728 /* Force global heap init */
729 if (heap
->global_age
[0] == 0)
730 heap
->local_age
= ~0;
734 make_empty_list( & heap
->texture_objects
);
735 driSetTextureSwapCounterLocation( heap
, NULL
);
737 heap
->weight
= heap
->size
;
748 fprintf( stderr
, "%s returning %p\n", __FUNCTION__
, (void *)heap
);
756 /** Destroys a texture heap
758 * \param heap Texture heap to be destroyed
762 driDestroyTextureHeap( driTexHeap
* heap
)
764 driTextureObject
* t
;
765 driTextureObject
* temp
;
768 if ( heap
!= NULL
) {
769 foreach_s( t
, temp
, & heap
->texture_objects
) {
770 driDestroyTextureObject( t
);
772 foreach_s( t
, temp
, heap
->swapped_objects
) {
773 driDestroyTextureObject( t
);
776 mmDestroy( heap
->memory_heap
);
784 /****************************************************************************/
786 * Determine how many texels (including all mipmap levels) would be required
787 * for a texture map of size \f$2^^\c base_size_log2\f$ would require.
789 * \param base_size_log2 \f$log_2\f$ of the size of a side of the texture
790 * \param dimensions Number of dimensions of the texture. Either 2 or 3.
791 * \param faces Number of faces of the texture. Either 1 or 6 (for cube maps).
792 * \return Number of texels
796 texels_this_map_size( int base_size_log2
, unsigned dimensions
, unsigned faces
)
801 assert( (faces
== 1) || (faces
== 6) );
802 assert( (dimensions
== 2) || (dimensions
== 3) );
805 if ( base_size_log2
>= 0 ) {
806 texels
= (1U << (dimensions
* base_size_log2
));
808 /* See http://www.mail-archive.com/dri-devel@lists.sourceforge.net/msg03636.html
809 * for the complete explaination of why this formulation is used.
810 * Basically, the smaller mipmap levels sum to 0.333 the size of the
811 * level 0 map. The total size is therefore the size of the map
812 * multipled by 1.333. The +2 is there to round up.
815 texels
= (texels
* 4 * faces
+ 2) / 3;
824 struct maps_per_heap
{
829 fill_in_maximums( driTexHeap
* const * heaps
, unsigned nr_heaps
,
830 unsigned max_bytes_per_texel
, unsigned max_size
,
831 unsigned mipmaps_at_once
, unsigned dimensions
,
832 unsigned faces
, struct maps_per_heap
* max_textures
)
839 /* Determine how many textures of each size can be stored in each
843 for ( heap
= 0 ; heap
< nr_heaps
; heap
++ ) {
844 if ( heaps
[ heap
] == NULL
) {
845 (void) memset( max_textures
[ heap
].c
, 0,
846 sizeof( max_textures
[ heap
].c
) );
850 mask
= (1U << heaps
[ heap
]->logGranularity
) - 1;
853 fprintf( stderr
, "[%s:%d] heap[%u] = %u bytes, mask = 0x%08x\n",
855 heap
, heaps
[ heap
]->size
, mask
);
858 for ( log2_size
= max_size
; log2_size
> 0 ; log2_size
-- ) {
862 /* Determine the total number of bytes required by a texture of
866 total
= texels_this_map_size( log2_size
, dimensions
, faces
)
867 - texels_this_map_size( log2_size
- mipmaps_at_once
,
869 total
*= max_bytes_per_texel
;
870 total
= (total
+ mask
) & ~mask
;
872 /* The number of textures of a given size that will fit in a heap
873 * is equal to the size of the heap divided by the size of the
877 max_textures
[ heap
].c
[ log2_size
] = heaps
[ heap
]->size
/ total
;
880 fprintf( stderr
, "[%s:%d] max_textures[%u].c[%02u] "
885 heaps
[ heap
]->size
, total
,
886 heaps
[ heap
]->size
/ total
,
887 max_textures
[ heap
].c
[ log2_size
] );
895 get_max_size( unsigned nr_heaps
,
896 unsigned texture_units
,
898 int all_textures_one_heap
,
899 struct maps_per_heap
* max_textures
)
905 /* Determine the largest texture size such that a texture of that size
906 * can be bound to each texture unit at the same time. Some hardware
907 * may require that all textures be in the same texture heap for
911 for ( log2_size
= max_size
; log2_size
> 0 ; log2_size
-- ) {
914 for ( heap
= 0 ; heap
< nr_heaps
; heap
++ )
916 total
+= max_textures
[ heap
].c
[ log2_size
];
919 fprintf( stderr
, "[%s:%d] max_textures[%u].c[%02u] = %u, "
920 "total = %u\n", __FILE__
, __LINE__
, heap
, log2_size
,
921 max_textures
[ heap
].c
[ log2_size
], total
);
924 if ( (max_textures
[ heap
].c
[ log2_size
] >= texture_units
)
925 || (!all_textures_one_heap
&& (total
>= texture_units
)) ) {
926 /* The number of mipmap levels is the log-base-2 of the
927 * maximum texture size plus 1. If the maximum texture size
928 * is 1x1, the log-base-2 is 0 and 1 mipmap level (the base
929 * level) is available.
932 return log2_size
+ 1;
937 /* This should NEVER happen. It should always be possible to have at
938 * *least* a 1x1 texture in memory!
940 assert( log2_size
!= 0 );
944 #define SET_MAX(f,v) \
945 do { if ( max_sizes[v] != 0 ) { limits-> f = max_sizes[v]; } } while( 0 )
947 #define SET_MAX_RECT(f,v) \
948 do { if ( max_sizes[v] != 0 ) { limits-> f = 1 << (max_sizes[v] - 1); } } while( 0 )
952 * Given the amount of texture memory, the number of texture units, and the
953 * maximum size of a texel, calculate the maximum texture size the driver can
956 * \param heaps Texture heaps for this card
957 * \param nr_heap Number of texture heaps
958 * \param limits OpenGL contants. MaxTextureUnits must be set.
959 * \param max_bytes_per_texel Maximum size of a single texel, in bytes
960 * \param max_2D_size \f$\log_2\f$ of the maximum 2D texture size (i.e.,
961 * 1024x1024 textures, this would be 10)
962 * \param max_3D_size \f$\log_2\f$ of the maximum 3D texture size (i.e.,
963 * 1024x1024x1024 textures, this would be 10)
964 * \param max_cube_size \f$\log_2\f$ of the maximum cube texture size (i.e.,
965 * 1024x1024 textures, this would be 10)
966 * \param max_rect_size \f$\log_2\f$ of the maximum texture rectangle size
967 * (i.e., 1024x1024 textures, this would be 10). This is a power-of-2
968 * even though texture rectangles need not be a power-of-2.
969 * \param mipmaps_at_once Total number of mipmaps that can be used
970 * at one time. For most hardware this will be \f$\c max_size + 1\f$.
971 * For hardware that does not support mipmapping, this will be 1.
972 * \param all_textures_one_heap True if the hardware requires that all
973 * textures be in a single texture heap for multitexturing.
977 driCalculateMaxTextureLevels( driTexHeap
* const * heaps
,
979 struct gl_constants
* limits
,
980 unsigned max_bytes_per_texel
,
981 unsigned max_2D_size
,
982 unsigned max_3D_size
,
983 unsigned max_cube_size
,
984 unsigned max_rect_size
,
985 unsigned mipmaps_at_once
,
986 int all_textures_one_heap
)
988 struct maps_per_heap max_textures
[8];
990 const unsigned dimensions
[4] = { 2, 3, 2, 2 };
991 const unsigned faces
[4] = { 1, 1, 6, 1 };
992 unsigned max_sizes
[4];
996 max_sizes
[0] = max_2D_size
;
997 max_sizes
[1] = max_3D_size
;
998 max_sizes
[2] = max_cube_size
;
999 max_sizes
[3] = max_rect_size
;
1001 mipmaps
[0] = mipmaps_at_once
;
1002 mipmaps
[1] = mipmaps_at_once
;
1003 mipmaps
[2] = mipmaps_at_once
;
1007 /* Calculate the maximum number of texture levels in two passes. The
1008 * first pass determines how many textures of each power-of-two size
1009 * (including all mipmap levels for that size) can fit in each texture
1010 * heap. The second pass finds the largest texture size that allows
1011 * a texture of that size to be bound to every texture unit.
1014 for ( i
= 0 ; i
< 4 ; i
++ ) {
1015 if ( max_sizes
[ i
] != 0 ) {
1016 fill_in_maximums( heaps
, nr_heaps
, max_bytes_per_texel
,
1017 max_sizes
[ i
], mipmaps
[ i
],
1018 dimensions
[ i
], faces
[ i
],
1021 max_sizes
[ i
] = get_max_size( nr_heaps
,
1022 limits
->MaxTextureUnits
,
1024 all_textures_one_heap
,
1029 SET_MAX( MaxTextureLevels
, 0 );
1030 SET_MAX( Max3DTextureLevels
, 1 );
1031 SET_MAX( MaxCubeTextureLevels
, 2 );
1032 SET_MAX_RECT( MaxTextureRectSize
, 3 );
1039 * Perform initial binding of default textures objects on a per unit, per
1040 * texture target basis.
1042 * \param ctx Current OpenGL context
1043 * \param swapped List of swapped-out textures
1044 * \param targets Bit-mask of value texture targets
1047 void driInitTextureObjects( GLcontext
*ctx
, driTextureObject
* swapped
,
1050 struct gl_texture_object
*texObj
;
1051 GLuint tmp
= ctx
->Texture
.CurrentUnit
;
1055 for ( i
= 0 ; i
< ctx
->Const
.MaxTextureUnits
; i
++ ) {
1056 ctx
->Texture
.CurrentUnit
= i
;
1058 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_1D
) != 0 ) {
1059 texObj
= ctx
->Texture
.Unit
[i
].Current1D
;
1060 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_1D
, texObj
);
1061 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1064 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_2D
) != 0 ) {
1065 texObj
= ctx
->Texture
.Unit
[i
].Current2D
;
1066 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_2D
, texObj
);
1067 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1070 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_3D
) != 0 ) {
1071 texObj
= ctx
->Texture
.Unit
[i
].Current3D
;
1072 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_3D
, texObj
);
1073 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1076 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_CUBE
) != 0 ) {
1077 texObj
= ctx
->Texture
.Unit
[i
].CurrentCubeMap
;
1078 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_CUBE_MAP_ARB
, texObj
);
1079 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1082 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_RECT
) != 0 ) {
1083 texObj
= ctx
->Texture
.Unit
[i
].CurrentRect
;
1084 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_RECTANGLE_NV
, texObj
);
1085 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1089 ctx
->Texture
.CurrentUnit
= tmp
;
1096 * Verify that the specified texture is in the specificed heap.
1098 * \param tex Texture to be tested.
1099 * \param heap Texture memory heap to be tested.
1100 * \return True if the texture is in the heap, false otherwise.
1104 check_in_heap( const driTextureObject
* tex
, const driTexHeap
* heap
)
1107 return tex
->heap
== heap
;
1109 driTextureObject
* curr
;
1111 foreach( curr
, & heap
->texture_objects
) {
1112 if ( curr
== tex
) {
1123 /****************************************************************************/
1125 * Validate the consistency of a set of texture heaps.
1126 * Original version by Keith Whitwell in r200/r200_sanity.c.
1130 driValidateTextureHeaps( driTexHeap
* const * texture_heaps
,
1131 unsigned nr_heaps
, const driTextureObject
* swapped
)
1133 driTextureObject
*t
;
1136 for ( i
= 0 ; i
< nr_heaps
; i
++ ) {
1138 unsigned textures_in_heap
= 0;
1139 unsigned blocks_in_mempool
= 0;
1140 const driTexHeap
* heap
= texture_heaps
[i
];
1141 const memHeap_t
* p
= heap
->memory_heap
;
1143 /* Check each texture object has a MemBlock, and is linked into
1146 * Check the texobj base address corresponds to the MemBlock
1147 * range. Check the texobj size (recalculate?) fits within
1150 * Count the number of texobj's using this heap.
1153 foreach ( t
, &heap
->texture_objects
) {
1154 if ( !check_in_heap( t
, heap
) ) {
1155 fprintf( stderr
, "%s memory block for texture object @ %p not "
1156 "found in heap #%d\n",
1157 __FUNCTION__
, (void *)t
, i
);
1162 if ( t
->totalSize
> t
->memBlock
->size
) {
1163 fprintf( stderr
, "%s: Memory block for texture object @ %p is "
1164 "only %u bytes, but %u are required\n",
1165 __FUNCTION__
, (void *)t
, t
->totalSize
, t
->memBlock
->size
);
1172 /* Validate the contents of the heap:
1178 while ( p
!= NULL
) {
1180 fprintf( stderr
, "%s: Block (%08x,%x), is reserved?!\n",
1181 __FUNCTION__
, p
->ofs
, p
->size
);
1185 if (p
->ofs
!= last_end
) {
1186 fprintf( stderr
, "%s: blocks_in_mempool = %d, last_end = %d, p->ofs = %d\n",
1187 __FUNCTION__
, blocks_in_mempool
, last_end
, p
->ofs
);
1191 if (!p
->reserved
&& !p
->free
) {
1192 blocks_in_mempool
++;
1195 last_end
= p
->ofs
+ p
->size
;
1199 if (textures_in_heap
!= blocks_in_mempool
) {
1200 fprintf( stderr
, "%s: Different number of textures objects (%u) and "
1201 "inuse memory blocks (%u)\n",
1202 __FUNCTION__
, textures_in_heap
, blocks_in_mempool
);
1207 fprintf( stderr
, "%s: textures_in_heap = %u\n",
1208 __FUNCTION__
, textures_in_heap
);
1213 /* Check swapped texobj's have zero memblocks
1216 foreach ( t
, swapped
) {
1217 if ( t
->memBlock
!= NULL
) {
1218 fprintf( stderr
, "%s: Swapped texobj %p has non-NULL memblock %p\n",
1219 __FUNCTION__
, (void *)t
, (void *)t
->memBlock
);
1226 fprintf( stderr
, "%s: swapped texture count = %u\n", __FUNCTION__
, i
);
1235 /****************************************************************************/
1237 * Compute which mipmap levels that really need to be sent to the hardware.
1238 * This depends on the base image size, GL_TEXTURE_MIN_LOD,
1239 * GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, and GL_TEXTURE_MAX_LEVEL.
1243 driCalculateTextureFirstLastLevel( driTextureObject
* t
)
1245 struct gl_texture_object
* const tObj
= t
->tObj
;
1246 const struct gl_texture_image
* const baseImage
=
1247 tObj
->Image
[0][tObj
->BaseLevel
];
1249 /* These must be signed values. MinLod and MaxLod can be negative numbers,
1250 * and having firstLevel and lastLevel as signed prevents the need for
1251 * extra sign checks.
1256 /* Yes, this looks overly complicated, but it's all needed.
1259 switch (tObj
->Target
) {
1263 case GL_TEXTURE_CUBE_MAP
:
1264 if (tObj
->MinFilter
== GL_NEAREST
|| tObj
->MinFilter
== GL_LINEAR
) {
1265 /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
1268 firstLevel
= lastLevel
= tObj
->BaseLevel
;
1271 firstLevel
= tObj
->BaseLevel
+ (GLint
)(tObj
->MinLod
+ 0.5);
1272 firstLevel
= MAX2(firstLevel
, tObj
->BaseLevel
);
1273 lastLevel
= tObj
->BaseLevel
+ (GLint
)(tObj
->MaxLod
+ 0.5);
1274 lastLevel
= MAX2(lastLevel
, t
->tObj
->BaseLevel
);
1275 lastLevel
= MIN2(lastLevel
, t
->tObj
->BaseLevel
+ baseImage
->MaxLog2
);
1276 lastLevel
= MIN2(lastLevel
, t
->tObj
->MaxLevel
);
1277 lastLevel
= MAX2(firstLevel
, lastLevel
); /* need at least one level */
1280 case GL_TEXTURE_RECTANGLE_NV
:
1281 case GL_TEXTURE_4D_SGIS
:
1282 firstLevel
= lastLevel
= 0;
1288 /* save these values */
1289 t
->firstLevel
= firstLevel
;
1290 t
->lastLevel
= lastLevel
;
1297 * \name DRI texture formats. Pointers initialized to either the big- or
1298 * little-endian Mesa formats.
1301 const struct gl_texture_format
*_dri_texformat_rgba8888
= NULL
;
1302 const struct gl_texture_format
*_dri_texformat_argb8888
= NULL
;
1303 const struct gl_texture_format
*_dri_texformat_rgb565
= NULL
;
1304 const struct gl_texture_format
*_dri_texformat_argb4444
= NULL
;
1305 const struct gl_texture_format
*_dri_texformat_argb1555
= NULL
;
1306 const struct gl_texture_format
*_dri_texformat_al88
= NULL
;
1307 const struct gl_texture_format
*_dri_texformat_a8
= &_mesa_texformat_a8
;
1308 const struct gl_texture_format
*_dri_texformat_ci8
= &_mesa_texformat_ci8
;
1309 const struct gl_texture_format
*_dri_texformat_i8
= &_mesa_texformat_i8
;
1310 const struct gl_texture_format
*_dri_texformat_l8
= &_mesa_texformat_l8
;
1315 * Initialize little endian target, host byte order independent texture formats
1318 driInitTextureFormats(void)
1320 const GLuint ui
= 1;
1321 const GLubyte littleEndian
= *((const GLubyte
*) &ui
);
1324 _dri_texformat_rgba8888
= &_mesa_texformat_rgba8888
;
1325 _dri_texformat_argb8888
= &_mesa_texformat_argb8888
;
1326 _dri_texformat_rgb565
= &_mesa_texformat_rgb565
;
1327 _dri_texformat_argb4444
= &_mesa_texformat_argb4444
;
1328 _dri_texformat_argb1555
= &_mesa_texformat_argb1555
;
1329 _dri_texformat_al88
= &_mesa_texformat_al88
;
1332 _dri_texformat_rgba8888
= &_mesa_texformat_rgba8888_rev
;
1333 _dri_texformat_argb8888
= &_mesa_texformat_argb8888_rev
;
1334 _dri_texformat_rgb565
= &_mesa_texformat_rgb565_rev
;
1335 _dri_texformat_argb4444
= &_mesa_texformat_argb4444_rev
;
1336 _dri_texformat_argb1555
= &_mesa_texformat_argb1555_rev
;
1337 _dri_texformat_al88
= &_mesa_texformat_al88_rev
;