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"
55 static unsigned dummy_swap_counter
;
59 * Calculate \f$\log_2\f$ of a value. This is a particularly poor
60 * implementation of this function. However, since system performance is in
61 * no way dependent on this function, the slowness of the implementation is
64 * \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
++) {
250 list
[i
].age
= heap
->local_age
;
252 /* remove_from_list(i)
254 list
[(unsigned)list
[i
].next
].prev
= list
[i
].prev
;
255 list
[(unsigned)list
[i
].prev
].next
= list
[i
].next
;
257 /* insert_at_head(list, i)
259 list
[i
].prev
= heap
->nrRegions
;
260 list
[i
].next
= list
[heap
->nrRegions
].next
;
261 list
[(unsigned)list
[heap
->nrRegions
].next
].prev
= i
;
262 list
[heap
->nrRegions
].next
= i
;
266 printGlobalLRU( heap
, __FUNCTION__
);
267 printLocalLRU( heap
, __FUNCTION__
);
276 * Keep track of swapped out texture objects.
278 * \param t Texture object to be "swapped" out of its texture heap
281 void driSwapOutTextureObject( driTextureObject
* t
)
286 if ( t
->memBlock
!= NULL
) {
287 assert( t
->heap
!= NULL
);
288 mmFreeMem( t
->memBlock
);
291 if (t
->timestamp
> t
->heap
->timestamp
)
292 t
->heap
->timestamp
= t
->timestamp
;
294 t
->heap
->texture_swaps
[0]++;
295 move_to_tail( t
->heap
->swapped_objects
, t
);
299 assert( t
->heap
== NULL
);
303 for ( face
= 0 ; face
< 6 ; face
++ ) {
304 t
->dirty_images
[face
] = ~0;
312 * Destroy hardware state associated with texture \a t. Calls the
313 * \a destroy_texture_object method associated with the heap from which
314 * \a t was allocated.
316 * \param t Texture object to be destroyed
319 void driDestroyTextureObject( driTextureObject
* t
)
325 fprintf( stderr
, "[%s:%d] freeing %p (tObj = %p, DriverData = %p)\n",
328 (void *)((t
!= NULL
) ? t
->tObj
: NULL
),
329 (void *)((t
!= NULL
&& t
->tObj
!= NULL
) ? t
->tObj
->DriverData
: NULL
));
335 assert( heap
!= NULL
);
337 heap
->texture_swaps
[0]++;
339 mmFreeMem( t
->memBlock
);
342 if (t
->timestamp
> t
->heap
->timestamp
)
343 t
->heap
->timestamp
= t
->timestamp
;
345 heap
->destroy_texture_object( heap
->driverContext
, t
);
349 if ( t
->tObj
!= NULL
) {
350 assert( t
->tObj
->DriverData
== t
);
351 t
->tObj
->DriverData
= NULL
;
354 remove_from_list( t
);
359 fprintf( stderr
, "[%s:%d] done freeing %p\n", __FILE__
, __LINE__
, (void *)t
);
367 * Update the local heap's representation of texture memory based on
368 * data in the SAREA. This is done each time it is detected that some other
369 * direct rendering client has held the lock. This pertains to both our local
370 * textures and the textures belonging to other clients. Keep track of other
371 * client's textures by pushing a placeholder texture onto the LRU list --
372 * these are denoted by \a tObj being \a NULL.
374 * \param heap Heap whose state is to be updated
375 * \param offset Byte offset in the heap that has been stolen
376 * \param size Size, in bytes, of the stolen block
377 * \param in_use Non-zero if the block is in-use by another context
380 static void driTexturesGone( driTexHeap
* heap
, int offset
, int size
,
383 driTextureObject
* t
;
384 driTextureObject
* tmp
;
387 foreach_s ( t
, tmp
, & heap
->texture_objects
) {
388 if ( (t
->memBlock
->ofs
< (offset
+ size
))
389 && ((t
->memBlock
->ofs
+ t
->memBlock
->size
) > offset
) ) {
390 /* It overlaps - kick it out. If the texture object is just a
391 * place holder, then destroy it all together. Otherwise, mark
392 * it as being swapped out.
395 if ( t
->tObj
!= NULL
) {
396 driSwapOutTextureObject( t
);
400 offset
== t
->memBlock
->ofs
&& size
== t
->memBlock
->size
) {
401 /* Matching placeholder already exists */
404 driDestroyTextureObject( t
);
412 t
= (driTextureObject
*) CALLOC( heap
->texture_object_size
);
413 if ( t
== NULL
) return;
415 t
->memBlock
= mmAllocMem( heap
->memory_heap
, size
, 0, offset
);
416 if ( t
->memBlock
== NULL
) {
417 fprintf( stderr
, "Couldn't alloc placeholder: heap %u sz %x ofs %x\n", heap
->heapId
,
418 (int)size
, (int)offset
);
419 mmDumpMemInfo( heap
->memory_heap
);
423 insert_at_head( & heap
->texture_objects
, t
);
431 * Called by the client on lock contention to determine whether textures have
432 * been stolen. If another client has modified a region in which we have
433 * textures, then we need to figure out which of our textures have been
434 * removed and update our global LRU.
436 * \param heap Texture heap to be updated
439 void driAgeTextures( driTexHeap
* heap
)
441 drmTextureRegionPtr list
= heap
->global_regions
;
442 unsigned sz
= 1U << (heap
->logGranularity
);
446 /* Have to go right round from the back to ensure stuff ends up
447 * LRU in the local list... Fix with a cursor pointer.
450 for (i
= list
[heap
->nrRegions
].prev
;
451 i
!= heap
->nrRegions
&& nr
< heap
->nrRegions
;
452 i
= list
[i
].prev
, nr
++) {
453 /* If switching texturing schemes, then the SAREA might not have been
454 * properly cleared, so we need to reset the global texture LRU.
457 if ( (i
* sz
) > heap
->size
) {
458 nr
= heap
->nrRegions
;
462 if (list
[i
].age
> heap
->local_age
)
463 driTexturesGone( heap
, i
* sz
, sz
, list
[i
].in_use
);
466 /* Loop or uninitialized heap detected. Reset.
469 if (nr
== heap
->nrRegions
) {
470 driTexturesGone( heap
, 0, heap
->size
, 0);
471 resetGlobalLRU( heap
);
475 printGlobalLRU( heap
, __FUNCTION__
);
476 printLocalLRU( heap
, __FUNCTION__
);
479 heap
->local_age
= heap
->global_age
[0];
486 * Allocate memory from a texture heap to hold a texture object. This
487 * routine will attempt to allocate memory for the texture from the heaps
488 * specified by \c heap_array in order. That is, first it will try to
489 * allocate from \c heap_array[0], then \c heap_array[1], and so on.
491 * \param heap_array Array of pointers to texture heaps to use
492 * \param nr_heaps Number of heap pointer in \a heap_array
493 * \param t Texture object for which space is needed
494 * \return The ID of the heap from which memory was allocated, or -1 if
495 * memory could not be allocated.
497 * \bug The replacement policy implemented by this function is horrible.
502 driAllocateTexture( driTexHeap
* const * heap_array
, unsigned nr_heaps
,
503 driTextureObject
* t
)
506 driTextureObject
* temp
;
507 driTextureObject
* cursor
;
511 /* In case it already has texture space, initialize heap. This also
512 * prevents GCC from issuing a warning that heap might be used
519 /* Run through each of the existing heaps and try to allocate a buffer
520 * to hold the texture.
523 for ( id
= 0 ; (t
->memBlock
== NULL
) && (id
< nr_heaps
) ; id
++ ) {
524 heap
= heap_array
[ id
];
525 if ( heap
!= NULL
) {
526 t
->memBlock
= mmAllocMem( heap
->memory_heap
, t
->totalSize
,
527 heap
->alignmentShift
, 0 );
532 /* Kick textures out until the requested texture fits.
535 if ( t
->memBlock
== NULL
) {
536 for ( id
= 0 ; (t
->memBlock
== NULL
) && (id
< nr_heaps
) ; id
++ ) {
537 heap
= heap_array
[ id
];
538 if ( t
->totalSize
<= heap
->size
) {
540 for ( cursor
= heap
->texture_objects
.prev
, temp
= cursor
->prev
;
541 cursor
!= &heap
->texture_objects
;
542 cursor
= temp
, temp
= cursor
->prev
) {
544 /* The the LRU element. If the texture is bound to one of
545 * the texture units, then we cannot kick it out.
547 if ( cursor
->bound
/* || cursor->reserved */ ) {
551 /* If this is a placeholder, there's no need to keep it */
553 driSwapOutTextureObject( cursor
);
555 driDestroyTextureObject( cursor
);
557 t
->memBlock
= mmAllocMem( heap
->memory_heap
, t
->totalSize
,
558 heap
->alignmentShift
, 0 );
563 } /* if ( t->totalSize <= heap->size ) ... */
568 if ( t
->memBlock
!= NULL
) {
569 /* id and heap->heapId may or may not be the same value here.
572 assert( heap
!= NULL
);
573 assert( (t
->heap
== NULL
) || (t
->heap
== heap
) );
579 assert( t
->heap
== NULL
);
581 fprintf( stderr
, "[%s:%d] unable to allocate texture\n",
582 __FUNCTION__
, __LINE__
);
593 * Set the location where the texture-swap counter is stored.
597 driSetTextureSwapCounterLocation( driTexHeap
* heap
, unsigned * counter
)
599 heap
->texture_swaps
= (counter
== NULL
) ? & dummy_swap_counter
: counter
;
606 * Create a new heap for texture data.
608 * \param heap_id Device-dependent heap identifier. This value
609 * will returned by driAllocateTexture when memory
610 * is allocated from this heap.
611 * \param context Device-dependent driver context. This is
612 * supplied as the first parameter to the
613 * \c destroy_tex_obj function.
614 * \param size Size, in bytes, of the texture region
615 * \param alignmentShift Alignment requirement for textures. If textures
616 * must be allocated on a 4096 byte boundry, this
618 * \param nr_regions Number of regions into which this texture space
619 * should be partitioned
620 * \param global_regions Array of \c drmTextureRegion structures in the SAREA
621 * \param global_age Pointer to the global texture age in the SAREA
622 * \param swapped_objects Pointer to the list of texture objects that are
623 * not in texture memory (i.e., have been swapped
625 * \param texture_object_size Size, in bytes, of a device-dependent texture
627 * \param destroy_tex_obj Function used to destroy a device-dependent
630 * \sa driDestroyTextureHeap
634 driCreateTextureHeap( unsigned heap_id
, void * context
, unsigned size
,
635 unsigned alignmentShift
, unsigned nr_regions
,
636 drmTextureRegionPtr global_regions
, unsigned * global_age
,
637 driTextureObject
* swapped_objects
,
638 unsigned texture_object_size
,
639 destroy_texture_object_t
* destroy_tex_obj
647 fprintf( stderr
, "%s( %u, %p, %u, %u, %u )\n",
649 heap_id
, (void *)context
, size
, alignmentShift
, nr_regions
);
651 heap
= (driTexHeap
*) CALLOC( sizeof( driTexHeap
) );
652 if ( heap
!= NULL
) {
653 l
= driLog2( (size
- 1) / nr_regions
);
654 if ( l
< alignmentShift
)
659 heap
->logGranularity
= l
;
660 heap
->size
= size
& ~((1L << l
) - 1);
662 heap
->memory_heap
= mmInit( 0, heap
->size
);
663 if ( heap
->memory_heap
!= NULL
) {
664 heap
->heapId
= heap_id
;
665 heap
->driverContext
= context
;
667 heap
->alignmentShift
= alignmentShift
;
668 heap
->nrRegions
= nr_regions
;
669 heap
->global_regions
= global_regions
;
670 heap
->global_age
= global_age
;
671 heap
->swapped_objects
= swapped_objects
;
672 heap
->texture_object_size
= texture_object_size
;
673 heap
->destroy_texture_object
= destroy_tex_obj
;
675 /* Force global heap init */
676 if (heap
->global_age
== 0)
677 heap
->local_age
= ~0;
681 make_empty_list( & heap
->texture_objects
);
682 driSetTextureSwapCounterLocation( heap
, NULL
);
692 fprintf( stderr
, "%s returning %p\n", __FUNCTION__
, (void *)heap
);
700 /** Destroys a texture heap
702 * \param heap Texture heap to be destroyed
706 driDestroyTextureHeap( driTexHeap
* heap
)
708 driTextureObject
* t
;
709 driTextureObject
* temp
;
712 if ( heap
!= NULL
) {
713 foreach_s( t
, temp
, & heap
->texture_objects
) {
714 driDestroyTextureObject( t
);
716 foreach_s( t
, temp
, heap
->swapped_objects
) {
717 driDestroyTextureObject( t
);
720 mmDestroy( heap
->memory_heap
);
728 /****************************************************************************/
730 * Determine how many texels (including all mipmap levels) would be required
731 * for a texture map of size \f$2^^\c base_size_log2\f$ would require.
733 * \param base_size_log2 \f$log_2\f$ of the size of a side of the texture
734 * \param dimensions Number of dimensions of the texture. Either 2 or 3.
735 * \param faces Number of faces of the texture. Either 1 or 6 (for cube maps).
736 * \return Number of texels
740 texels_this_map_size( int base_size_log2
, unsigned dimensions
, unsigned faces
)
745 assert( (faces
== 1) || (faces
== 6) );
746 assert( (dimensions
== 2) || (dimensions
== 3) );
749 if ( base_size_log2
>= 0 ) {
750 texels
= (1U << (dimensions
* base_size_log2
));
752 /* See http://www.mail-archive.com/dri-devel@lists.sourceforge.net/msg03636.html
753 * for the complete explaination of why this formulation is used.
754 * Basically, the smaller mipmap levels sum to 0.333 the size of the
755 * level 0 map. The total size is therefore the size of the map
756 * multipled by 1.333. The +2 is there to round up.
759 texels
= (texels
* 4 * faces
+ 2) / 3;
768 struct maps_per_heap
{
773 fill_in_maximums( driTexHeap
* const * heaps
, unsigned nr_heaps
,
774 unsigned max_bytes_per_texel
, unsigned max_size
,
775 unsigned mipmaps_at_once
, unsigned dimensions
,
776 unsigned faces
, struct maps_per_heap
* max_textures
)
783 /* Determine how many textures of each size can be stored in each
787 for ( heap
= 0 ; heap
< nr_heaps
; heap
++ ) {
788 if ( heaps
[ heap
] == NULL
) {
789 (void) memset( max_textures
[ heap
].c
, 0,
790 sizeof( max_textures
[ heap
].c
) );
794 mask
= (1U << heaps
[ heap
]->logGranularity
) - 1;
797 fprintf( stderr
, "[%s:%d] heap[%u] = %u bytes, mask = 0x%08x\n",
799 heap
, heaps
[ heap
]->size
, mask
);
802 for ( log2_size
= max_size
; log2_size
> 0 ; log2_size
-- ) {
806 /* Determine the total number of bytes required by a texture of
810 total
= texels_this_map_size( log2_size
, dimensions
, faces
)
811 - texels_this_map_size( log2_size
- mipmaps_at_once
,
813 total
*= max_bytes_per_texel
;
814 total
= (total
+ mask
) & ~mask
;
816 /* The number of textures of a given size that will fit in a heap
817 * is equal to the size of the heap divided by the size of the
821 max_textures
[ heap
].c
[ log2_size
] = heaps
[ heap
]->size
/ total
;
824 fprintf( stderr
, "[%s:%d] max_textures[%u].c[%02u] "
829 heaps
[ heap
]->size
, total
,
830 heaps
[ heap
]->size
/ total
,
831 max_textures
[ heap
].c
[ log2_size
] );
839 get_max_size( unsigned nr_heaps
,
840 unsigned texture_units
,
842 int all_textures_one_heap
,
843 struct maps_per_heap
* max_textures
)
849 /* Determine the largest texture size such that a texture of that size
850 * can be bound to each texture unit at the same time. Some hardware
851 * may require that all textures be in the same texture heap for
855 for ( log2_size
= max_size
; log2_size
> 0 ; log2_size
-- ) {
858 for ( heap
= 0 ; heap
< nr_heaps
; heap
++ )
860 total
+= max_textures
[ heap
].c
[ log2_size
];
863 fprintf( stderr
, "[%s:%d] max_textures[%u].c[%02u] = %u, "
864 "total = %u\n", __FILE__
, __LINE__
, heap
, log2_size
,
865 max_textures
[ heap
].c
[ log2_size
], total
);
868 if ( (max_textures
[ heap
].c
[ log2_size
] >= texture_units
)
869 || (!all_textures_one_heap
&& (total
>= texture_units
)) ) {
870 /* The number of mipmap levels is the log-base-2 of the
871 * maximum texture size plus 1. If the maximum texture size
872 * is 1x1, the log-base-2 is 0 and 1 mipmap level (the base
873 * level) is available.
876 return log2_size
+ 1;
881 /* This should NEVER happen. It should always be possible to have at
882 * *least* a 1x1 texture in memory!
884 assert( log2_size
!= 0 );
888 #define SET_MAX(f,v) \
889 do { if ( max_sizes[v] != 0 ) { limits-> f = max_sizes[v]; } } while( 0 )
891 #define SET_MAX_RECT(f,v) \
892 do { if ( max_sizes[v] != 0 ) { limits-> f = 1 << max_sizes[v]; } } while( 0 )
896 * Given the amount of texture memory, the number of texture units, and the
897 * maximum size of a texel, calculate the maximum texture size the driver can
900 * \param heaps Texture heaps for this card
901 * \param nr_heap Number of texture heaps
902 * \param limits OpenGL contants. MaxTextureUnits must be set.
903 * \param max_bytes_per_texel Maximum size of a single texel, in bytes
904 * \param max_2D_size \f$\log_2\f$ of the maximum 2D texture size (i.e.,
905 * 1024x1024 textures, this would be 10)
906 * \param max_3D_size \f$\log_2\f$ of the maximum 3D texture size (i.e.,
907 * 1024x1024x1024 textures, this would be 10)
908 * \param max_cube_size \f$\log_2\f$ of the maximum cube texture size (i.e.,
909 * 1024x1024 textures, this would be 10)
910 * \param max_rect_size \f$\log_2\f$ of the maximum texture rectangle size
911 * (i.e., 1024x1024 textures, this would be 10). This is a power-of-2
912 * even though texture rectangles need not be a power-of-2.
913 * \param mipmaps_at_once Total number of mipmaps that can be used
914 * at one time. For most hardware this will be \f$\c max_size + 1\f$.
915 * For hardware that does not support mipmapping, this will be 1.
916 * \param all_textures_one_heap True if the hardware requires that all
917 * textures be in a single texture heap for multitexturing.
921 driCalculateMaxTextureLevels( driTexHeap
* const * heaps
,
923 struct gl_constants
* limits
,
924 unsigned max_bytes_per_texel
,
925 unsigned max_2D_size
,
926 unsigned max_3D_size
,
927 unsigned max_cube_size
,
928 unsigned max_rect_size
,
929 unsigned mipmaps_at_once
,
930 int all_textures_one_heap
)
932 struct maps_per_heap max_textures
[8];
934 const unsigned dimensions
[4] = { 2, 3, 2, 2 };
935 const unsigned faces
[4] = { 1, 1, 6, 1 };
936 unsigned max_sizes
[4];
940 max_sizes
[0] = max_2D_size
;
941 max_sizes
[1] = max_3D_size
;
942 max_sizes
[2] = max_cube_size
;
943 max_sizes
[3] = max_rect_size
;
945 mipmaps
[0] = mipmaps_at_once
;
946 mipmaps
[1] = mipmaps_at_once
;
948 mipmaps
[3] = mipmaps_at_once
;
951 /* Calculate the maximum number of texture levels in two passes. The
952 * first pass determines how many textures of each power-of-two size
953 * (including all mipmap levels for that size) can fit in each texture
954 * heap. The second pass finds the largest texture size that allows
955 * a texture of that size to be bound to every texture unit.
958 for ( i
= 0 ; i
< 4 ; i
++ ) {
959 if ( max_sizes
[ i
] != 0 ) {
960 fill_in_maximums( heaps
, nr_heaps
, max_bytes_per_texel
,
961 max_sizes
[ i
], mipmaps
[ i
],
962 dimensions
[ i
], faces
[ i
],
965 max_sizes
[ i
] = get_max_size( nr_heaps
,
966 limits
->MaxTextureUnits
,
968 all_textures_one_heap
,
973 SET_MAX( MaxTextureLevels
, 0 );
974 SET_MAX( Max3DTextureLevels
, 1 );
975 SET_MAX( MaxCubeTextureLevels
, 2 );
976 SET_MAX_RECT( MaxTextureRectSize
, 3 );
983 * Perform initial binding of default textures objects on a per unit, per
984 * texture target basis.
986 * \param ctx Current OpenGL context
987 * \param swapped List of swapped-out textures
988 * \param targets Bit-mask of value texture targets
991 void driInitTextureObjects( GLcontext
*ctx
, driTextureObject
* swapped
,
994 struct gl_texture_object
*texObj
;
995 GLuint tmp
= ctx
->Texture
.CurrentUnit
;
999 for ( i
= 0 ; i
< ctx
->Const
.MaxTextureUnits
; i
++ ) {
1000 ctx
->Texture
.CurrentUnit
= i
;
1002 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_1D
) != 0 ) {
1003 texObj
= ctx
->Texture
.Unit
[i
].Current1D
;
1004 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_1D
, texObj
);
1005 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1008 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_2D
) != 0 ) {
1009 texObj
= ctx
->Texture
.Unit
[i
].Current2D
;
1010 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_2D
, texObj
);
1011 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1014 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_3D
) != 0 ) {
1015 texObj
= ctx
->Texture
.Unit
[i
].Current3D
;
1016 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_3D
, texObj
);
1017 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1020 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_CUBE
) != 0 ) {
1021 texObj
= ctx
->Texture
.Unit
[i
].CurrentCubeMap
;
1022 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_CUBE_MAP_ARB
, texObj
);
1023 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1026 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_RECT
) != 0 ) {
1027 texObj
= ctx
->Texture
.Unit
[i
].CurrentRect
;
1028 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_RECTANGLE_NV
, texObj
);
1029 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1033 ctx
->Texture
.CurrentUnit
= tmp
;
1040 * Verify that the specified texture is in the specificed heap.
1042 * \param tex Texture to be tested.
1043 * \param heap Texture memory heap to be tested.
1044 * \return True if the texture is in the heap, false otherwise.
1048 check_in_heap( const driTextureObject
* tex
, const driTexHeap
* heap
)
1051 return tex
->heap
== heap
;
1053 driTextureObject
* curr
;
1055 foreach( curr
, & heap
->texture_objects
) {
1056 if ( curr
== tex
) {
1067 /****************************************************************************/
1069 * Validate the consistency of a set of texture heaps.
1070 * Original version by Keith Whitwell in r200/r200_sanity.c.
1074 driValidateTextureHeaps( driTexHeap
* const * texture_heaps
,
1075 unsigned nr_heaps
, const driTextureObject
* swapped
)
1077 driTextureObject
*t
;
1080 for ( i
= 0 ; i
< nr_heaps
; i
++ ) {
1082 unsigned textures_in_heap
= 0;
1083 unsigned blocks_in_mempool
= 0;
1084 const driTexHeap
* heap
= texture_heaps
[i
];
1085 const memHeap_t
* p
= heap
->memory_heap
;
1087 /* Check each texture object has a MemBlock, and is linked into
1090 * Check the texobj base address corresponds to the MemBlock
1091 * range. Check the texobj size (recalculate???) fits within
1094 * Count the number of texobj's using this heap.
1097 foreach ( t
, &heap
->texture_objects
) {
1098 if ( !check_in_heap( t
, heap
) ) {
1099 fprintf( stderr
, "%s memory block for texture object @ %p not "
1100 "found in heap #%d\n",
1101 __FUNCTION__
, (void *)t
, i
);
1106 if ( t
->totalSize
> t
->memBlock
->size
) {
1107 fprintf( stderr
, "%s: Memory block for texture object @ %p is "
1108 "only %u bytes, but %u are required\n",
1109 __FUNCTION__
, (void *)t
, t
->totalSize
, t
->memBlock
->size
);
1116 /* Validate the contents of the heap:
1122 while ( p
!= NULL
) {
1124 fprintf( stderr
, "%s: Block (%08x,%x), is reserved?!\n",
1125 __FUNCTION__
, p
->ofs
, p
->size
);
1129 if (p
->ofs
!= last_end
) {
1130 fprintf( stderr
, "%s: blocks_in_mempool = %d, last_end = %d, p->ofs = %d\n",
1131 __FUNCTION__
, blocks_in_mempool
, last_end
, p
->ofs
);
1135 if (!p
->reserved
&& !p
->free
) {
1136 blocks_in_mempool
++;
1139 last_end
= p
->ofs
+ p
->size
;
1143 if (textures_in_heap
!= blocks_in_mempool
) {
1144 fprintf( stderr
, "%s: Different number of textures objects (%u) and "
1145 "inuse memory blocks (%u)\n",
1146 __FUNCTION__
, textures_in_heap
, blocks_in_mempool
);
1151 fprintf( stderr
, "%s: textures_in_heap = %u\n",
1152 __FUNCTION__
, textures_in_heap
);
1157 /* Check swapped texobj's have zero memblocks
1160 foreach ( t
, swapped
) {
1161 if ( t
->memBlock
!= NULL
) {
1162 fprintf( stderr
, "%s: Swapped texobj %p has non-NULL memblock %p\n",
1163 __FUNCTION__
, (void *)t
, (void *)t
->memBlock
);
1170 fprintf( stderr
, "%s: swapped texture count = %u\n", __FUNCTION__
, i
);
1179 /****************************************************************************/
1181 * Compute which mipmap levels that really need to be sent to the hardware.
1182 * This depends on the base image size, GL_TEXTURE_MIN_LOD,
1183 * GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, and GL_TEXTURE_MAX_LEVEL.
1187 driCalculateTextureFirstLastLevel( driTextureObject
* t
)
1189 struct gl_texture_object
* const tObj
= t
->tObj
;
1190 const struct gl_texture_image
* const baseImage
=
1191 tObj
->Image
[tObj
->BaseLevel
];
1193 /* These must be signed values. MinLod and MaxLod can be negative numbers,
1194 * and having firstLevel and lastLevel as signed prevents the need for
1195 * extra sign checks.
1200 /* Yes, this looks overly complicated, but it's all needed.
1203 switch (tObj
->Target
) {
1207 case GL_TEXTURE_CUBE_MAP
:
1208 if (tObj
->MinFilter
== GL_NEAREST
|| tObj
->MinFilter
== GL_LINEAR
) {
1209 /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
1212 firstLevel
= lastLevel
= tObj
->BaseLevel
;
1215 firstLevel
= tObj
->BaseLevel
+ (GLint
)(tObj
->MinLod
+ 0.5);
1216 firstLevel
= MAX2(firstLevel
, tObj
->BaseLevel
);
1217 lastLevel
= tObj
->BaseLevel
+ (GLint
)(tObj
->MaxLod
+ 0.5);
1218 lastLevel
= MAX2(lastLevel
, t
->tObj
->BaseLevel
);
1219 lastLevel
= MIN2(lastLevel
, t
->tObj
->BaseLevel
+ baseImage
->MaxLog2
);
1220 lastLevel
= MIN2(lastLevel
, t
->tObj
->MaxLevel
);
1221 lastLevel
= MAX2(firstLevel
, lastLevel
); /* need at least one level */
1224 case GL_TEXTURE_RECTANGLE_NV
:
1225 case GL_TEXTURE_4D_SGIS
:
1226 firstLevel
= lastLevel
= 0;
1232 /* save these values */
1233 t
->firstLevel
= firstLevel
;
1234 t
->lastLevel
= lastLevel
;