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];
481 * Allocate memory from a texture heap to hold a texture object. This
482 * routine will attempt to allocate memory for the texture from the heaps
483 * specified by \c heap_array in order. That is, first it will try to
484 * allocate from \c heap_array[0], then \c heap_array[1], and so on.
486 * \param heap_array Array of pointers to texture heaps to use
487 * \param nr_heaps Number of heap pointer in \a heap_array
488 * \param t Texture object for which space is needed
489 * \return The ID of the heap from which memory was allocated, or -1 if
490 * memory could not be allocated.
492 * \bug The replacement policy implemented by this function is horrible.
497 driAllocateTexture( driTexHeap
* const * heap_array
, unsigned nr_heaps
,
498 driTextureObject
* t
)
501 driTextureObject
* temp
;
502 driTextureObject
* cursor
;
506 /* In case it already has texture space, initialize heap. This also
507 * prevents GCC from issuing a warning that heap might be used
514 /* Run through each of the existing heaps and try to allocate a buffer
515 * to hold the texture.
518 for ( id
= 0 ; (t
->memBlock
== NULL
) && (id
< nr_heaps
) ; id
++ ) {
519 heap
= heap_array
[ id
];
520 if ( heap
!= NULL
) {
521 t
->memBlock
= mmAllocMem( heap
->memory_heap
, t
->totalSize
,
522 heap
->alignmentShift
, 0 );
527 /* Kick textures out until the requested texture fits.
530 if ( t
->memBlock
== NULL
) {
531 for ( id
= 0 ; (t
->memBlock
== NULL
) && (id
< nr_heaps
) ; id
++ ) {
532 heap
= heap_array
[ id
];
533 if ( t
->totalSize
<= heap
->size
) {
535 for ( cursor
= heap
->texture_objects
.prev
, temp
= cursor
->prev
;
536 cursor
!= &heap
->texture_objects
;
537 cursor
= temp
, temp
= cursor
->prev
) {
539 /* The the LRU element. If the texture is bound to one of
540 * the texture units, then we cannot kick it out.
542 if ( cursor
->bound
/* || cursor->reserved */ ) {
546 /* If this is a placeholder, there's no need to keep it */
548 driSwapOutTextureObject( cursor
);
550 driDestroyTextureObject( cursor
);
552 t
->memBlock
= mmAllocMem( heap
->memory_heap
, t
->totalSize
,
553 heap
->alignmentShift
, 0 );
558 } /* if ( t->totalSize <= heap->size ) ... */
563 if ( t
->memBlock
!= NULL
) {
564 /* id and heap->heapId may or may not be the same value here.
567 assert( heap
!= NULL
);
568 assert( (t
->heap
== NULL
) || (t
->heap
== heap
) );
574 assert( t
->heap
== NULL
);
576 fprintf( stderr
, "[%s:%d] unable to allocate texture\n",
577 __FUNCTION__
, __LINE__
);
588 * Set the location where the texture-swap counter is stored.
592 driSetTextureSwapCounterLocation( driTexHeap
* heap
, unsigned * counter
)
594 heap
->texture_swaps
= (counter
== NULL
) ? & dummy_swap_counter
: counter
;
601 * Create a new heap for texture data.
603 * \param heap_id Device-dependent heap identifier. This value
604 * will returned by driAllocateTexture when memory
605 * is allocated from this heap.
606 * \param context Device-dependent driver context. This is
607 * supplied as the first parameter to the
608 * \c destroy_tex_obj function.
609 * \param size Size, in bytes, of the texture region
610 * \param alignmentShift Alignment requirement for textures. If textures
611 * must be allocated on a 4096 byte boundry, this
613 * \param nr_regions Number of regions into which this texture space
614 * should be partitioned
615 * \param global_regions Array of \c drmTextureRegion structures in the SAREA
616 * \param global_age Pointer to the global texture age in the SAREA
617 * \param swapped_objects Pointer to the list of texture objects that are
618 * not in texture memory (i.e., have been swapped
620 * \param texture_object_size Size, in bytes, of a device-dependent texture
622 * \param destroy_tex_obj Function used to destroy a device-dependent
625 * \sa driDestroyTextureHeap
629 driCreateTextureHeap( unsigned heap_id
, void * context
, unsigned size
,
630 unsigned alignmentShift
, unsigned nr_regions
,
631 drmTextureRegionPtr global_regions
, unsigned * global_age
,
632 driTextureObject
* swapped_objects
,
633 unsigned texture_object_size
,
634 destroy_texture_object_t
* destroy_tex_obj
642 fprintf( stderr
, "%s( %u, %p, %u, %u, %u )\n",
644 heap_id
, (void *)context
, size
, alignmentShift
, nr_regions
);
646 heap
= (driTexHeap
*) CALLOC( sizeof( driTexHeap
) );
647 if ( heap
!= NULL
) {
648 l
= driLog2( (size
- 1) / nr_regions
);
649 if ( l
< alignmentShift
)
654 heap
->logGranularity
= l
;
655 heap
->size
= size
& ~((1L << l
) - 1);
657 heap
->memory_heap
= mmInit( 0, heap
->size
);
658 if ( heap
->memory_heap
!= NULL
) {
659 heap
->heapId
= heap_id
;
660 heap
->driverContext
= context
;
662 heap
->alignmentShift
= alignmentShift
;
663 heap
->nrRegions
= nr_regions
;
664 heap
->global_regions
= global_regions
;
665 heap
->global_age
= global_age
;
666 heap
->swapped_objects
= swapped_objects
;
667 heap
->texture_object_size
= texture_object_size
;
668 heap
->destroy_texture_object
= destroy_tex_obj
;
670 /* Force global heap init */
671 if (heap
->global_age
[0] == 0)
672 heap
->local_age
= ~0;
676 make_empty_list( & heap
->texture_objects
);
677 driSetTextureSwapCounterLocation( heap
, NULL
);
687 fprintf( stderr
, "%s returning %p\n", __FUNCTION__
, (void *)heap
);
695 /** Destroys a texture heap
697 * \param heap Texture heap to be destroyed
701 driDestroyTextureHeap( driTexHeap
* heap
)
703 driTextureObject
* t
;
704 driTextureObject
* temp
;
707 if ( heap
!= NULL
) {
708 foreach_s( t
, temp
, & heap
->texture_objects
) {
709 driDestroyTextureObject( t
);
711 foreach_s( t
, temp
, heap
->swapped_objects
) {
712 driDestroyTextureObject( t
);
715 mmDestroy( heap
->memory_heap
);
723 /****************************************************************************/
725 * Determine how many texels (including all mipmap levels) would be required
726 * for a texture map of size \f$2^^\c base_size_log2\f$ would require.
728 * \param base_size_log2 \f$log_2\f$ of the size of a side of the texture
729 * \param dimensions Number of dimensions of the texture. Either 2 or 3.
730 * \param faces Number of faces of the texture. Either 1 or 6 (for cube maps).
731 * \return Number of texels
735 texels_this_map_size( int base_size_log2
, unsigned dimensions
, unsigned faces
)
740 assert( (faces
== 1) || (faces
== 6) );
741 assert( (dimensions
== 2) || (dimensions
== 3) );
744 if ( base_size_log2
>= 0 ) {
745 texels
= (1U << (dimensions
* base_size_log2
));
747 /* See http://www.mail-archive.com/dri-devel@lists.sourceforge.net/msg03636.html
748 * for the complete explaination of why this formulation is used.
749 * Basically, the smaller mipmap levels sum to 0.333 the size of the
750 * level 0 map. The total size is therefore the size of the map
751 * multipled by 1.333. The +2 is there to round up.
754 texels
= (texels
* 4 * faces
+ 2) / 3;
763 struct maps_per_heap
{
768 fill_in_maximums( driTexHeap
* const * heaps
, unsigned nr_heaps
,
769 unsigned max_bytes_per_texel
, unsigned max_size
,
770 unsigned mipmaps_at_once
, unsigned dimensions
,
771 unsigned faces
, struct maps_per_heap
* max_textures
)
778 /* Determine how many textures of each size can be stored in each
782 for ( heap
= 0 ; heap
< nr_heaps
; heap
++ ) {
783 if ( heaps
[ heap
] == NULL
) {
784 (void) memset( max_textures
[ heap
].c
, 0,
785 sizeof( max_textures
[ heap
].c
) );
789 mask
= (1U << heaps
[ heap
]->logGranularity
) - 1;
792 fprintf( stderr
, "[%s:%d] heap[%u] = %u bytes, mask = 0x%08x\n",
794 heap
, heaps
[ heap
]->size
, mask
);
797 for ( log2_size
= max_size
; log2_size
> 0 ; log2_size
-- ) {
801 /* Determine the total number of bytes required by a texture of
805 total
= texels_this_map_size( log2_size
, dimensions
, faces
)
806 - texels_this_map_size( log2_size
- mipmaps_at_once
,
808 total
*= max_bytes_per_texel
;
809 total
= (total
+ mask
) & ~mask
;
811 /* The number of textures of a given size that will fit in a heap
812 * is equal to the size of the heap divided by the size of the
816 max_textures
[ heap
].c
[ log2_size
] = heaps
[ heap
]->size
/ total
;
819 fprintf( stderr
, "[%s:%d] max_textures[%u].c[%02u] "
824 heaps
[ heap
]->size
, total
,
825 heaps
[ heap
]->size
/ total
,
826 max_textures
[ heap
].c
[ log2_size
] );
834 get_max_size( unsigned nr_heaps
,
835 unsigned texture_units
,
837 int all_textures_one_heap
,
838 struct maps_per_heap
* max_textures
)
844 /* Determine the largest texture size such that a texture of that size
845 * can be bound to each texture unit at the same time. Some hardware
846 * may require that all textures be in the same texture heap for
850 for ( log2_size
= max_size
; log2_size
> 0 ; log2_size
-- ) {
853 for ( heap
= 0 ; heap
< nr_heaps
; heap
++ )
855 total
+= max_textures
[ heap
].c
[ log2_size
];
858 fprintf( stderr
, "[%s:%d] max_textures[%u].c[%02u] = %u, "
859 "total = %u\n", __FILE__
, __LINE__
, heap
, log2_size
,
860 max_textures
[ heap
].c
[ log2_size
], total
);
863 if ( (max_textures
[ heap
].c
[ log2_size
] >= texture_units
)
864 || (!all_textures_one_heap
&& (total
>= texture_units
)) ) {
865 /* The number of mipmap levels is the log-base-2 of the
866 * maximum texture size plus 1. If the maximum texture size
867 * is 1x1, the log-base-2 is 0 and 1 mipmap level (the base
868 * level) is available.
871 return log2_size
+ 1;
876 /* This should NEVER happen. It should always be possible to have at
877 * *least* a 1x1 texture in memory!
879 assert( log2_size
!= 0 );
883 #define SET_MAX(f,v) \
884 do { if ( max_sizes[v] != 0 ) { limits-> f = max_sizes[v]; } } while( 0 )
886 #define SET_MAX_RECT(f,v) \
887 do { if ( max_sizes[v] != 0 ) { limits-> f = 1 << max_sizes[v]; } } while( 0 )
891 * Given the amount of texture memory, the number of texture units, and the
892 * maximum size of a texel, calculate the maximum texture size the driver can
895 * \param heaps Texture heaps for this card
896 * \param nr_heap Number of texture heaps
897 * \param limits OpenGL contants. MaxTextureUnits must be set.
898 * \param max_bytes_per_texel Maximum size of a single texel, in bytes
899 * \param max_2D_size \f$\log_2\f$ of the maximum 2D texture size (i.e.,
900 * 1024x1024 textures, this would be 10)
901 * \param max_3D_size \f$\log_2\f$ of the maximum 3D texture size (i.e.,
902 * 1024x1024x1024 textures, this would be 10)
903 * \param max_cube_size \f$\log_2\f$ of the maximum cube texture size (i.e.,
904 * 1024x1024 textures, this would be 10)
905 * \param max_rect_size \f$\log_2\f$ of the maximum texture rectangle size
906 * (i.e., 1024x1024 textures, this would be 10). This is a power-of-2
907 * even though texture rectangles need not be a power-of-2.
908 * \param mipmaps_at_once Total number of mipmaps that can be used
909 * at one time. For most hardware this will be \f$\c max_size + 1\f$.
910 * For hardware that does not support mipmapping, this will be 1.
911 * \param all_textures_one_heap True if the hardware requires that all
912 * textures be in a single texture heap for multitexturing.
916 driCalculateMaxTextureLevels( driTexHeap
* const * heaps
,
918 struct gl_constants
* limits
,
919 unsigned max_bytes_per_texel
,
920 unsigned max_2D_size
,
921 unsigned max_3D_size
,
922 unsigned max_cube_size
,
923 unsigned max_rect_size
,
924 unsigned mipmaps_at_once
,
925 int all_textures_one_heap
)
927 struct maps_per_heap max_textures
[8];
929 const unsigned dimensions
[4] = { 2, 3, 2, 2 };
930 const unsigned faces
[4] = { 1, 1, 6, 1 };
931 unsigned max_sizes
[4];
935 max_sizes
[0] = max_2D_size
;
936 max_sizes
[1] = max_3D_size
;
937 max_sizes
[2] = max_cube_size
;
938 max_sizes
[3] = max_rect_size
;
940 mipmaps
[0] = mipmaps_at_once
;
941 mipmaps
[1] = mipmaps_at_once
;
943 mipmaps
[3] = mipmaps_at_once
;
946 /* Calculate the maximum number of texture levels in two passes. The
947 * first pass determines how many textures of each power-of-two size
948 * (including all mipmap levels for that size) can fit in each texture
949 * heap. The second pass finds the largest texture size that allows
950 * a texture of that size to be bound to every texture unit.
953 for ( i
= 0 ; i
< 4 ; i
++ ) {
954 if ( max_sizes
[ i
] != 0 ) {
955 fill_in_maximums( heaps
, nr_heaps
, max_bytes_per_texel
,
956 max_sizes
[ i
], mipmaps
[ i
],
957 dimensions
[ i
], faces
[ i
],
960 max_sizes
[ i
] = get_max_size( nr_heaps
,
961 limits
->MaxTextureUnits
,
963 all_textures_one_heap
,
968 SET_MAX( MaxTextureLevels
, 0 );
969 SET_MAX( Max3DTextureLevels
, 1 );
970 SET_MAX( MaxCubeTextureLevels
, 2 );
971 SET_MAX_RECT( MaxTextureRectSize
, 3 );
978 * Perform initial binding of default textures objects on a per unit, per
979 * texture target basis.
981 * \param ctx Current OpenGL context
982 * \param swapped List of swapped-out textures
983 * \param targets Bit-mask of value texture targets
986 void driInitTextureObjects( GLcontext
*ctx
, driTextureObject
* swapped
,
989 struct gl_texture_object
*texObj
;
990 GLuint tmp
= ctx
->Texture
.CurrentUnit
;
994 for ( i
= 0 ; i
< ctx
->Const
.MaxTextureUnits
; i
++ ) {
995 ctx
->Texture
.CurrentUnit
= i
;
997 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_1D
) != 0 ) {
998 texObj
= ctx
->Texture
.Unit
[i
].Current1D
;
999 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_1D
, texObj
);
1000 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1003 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_2D
) != 0 ) {
1004 texObj
= ctx
->Texture
.Unit
[i
].Current2D
;
1005 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_2D
, texObj
);
1006 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1009 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_3D
) != 0 ) {
1010 texObj
= ctx
->Texture
.Unit
[i
].Current3D
;
1011 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_3D
, texObj
);
1012 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1015 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_CUBE
) != 0 ) {
1016 texObj
= ctx
->Texture
.Unit
[i
].CurrentCubeMap
;
1017 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_CUBE_MAP_ARB
, texObj
);
1018 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1021 if ( (targets
& DRI_TEXMGR_DO_TEXTURE_RECT
) != 0 ) {
1022 texObj
= ctx
->Texture
.Unit
[i
].CurrentRect
;
1023 ctx
->Driver
.BindTexture( ctx
, GL_TEXTURE_RECTANGLE_NV
, texObj
);
1024 move_to_tail( swapped
, (driTextureObject
*) texObj
->DriverData
);
1028 ctx
->Texture
.CurrentUnit
= tmp
;
1035 * Verify that the specified texture is in the specificed heap.
1037 * \param tex Texture to be tested.
1038 * \param heap Texture memory heap to be tested.
1039 * \return True if the texture is in the heap, false otherwise.
1043 check_in_heap( const driTextureObject
* tex
, const driTexHeap
* heap
)
1046 return tex
->heap
== heap
;
1048 driTextureObject
* curr
;
1050 foreach( curr
, & heap
->texture_objects
) {
1051 if ( curr
== tex
) {
1062 /****************************************************************************/
1064 * Validate the consistency of a set of texture heaps.
1065 * Original version by Keith Whitwell in r200/r200_sanity.c.
1069 driValidateTextureHeaps( driTexHeap
* const * texture_heaps
,
1070 unsigned nr_heaps
, const driTextureObject
* swapped
)
1072 driTextureObject
*t
;
1075 for ( i
= 0 ; i
< nr_heaps
; i
++ ) {
1077 unsigned textures_in_heap
= 0;
1078 unsigned blocks_in_mempool
= 0;
1079 const driTexHeap
* heap
= texture_heaps
[i
];
1080 const memHeap_t
* p
= heap
->memory_heap
;
1082 /* Check each texture object has a MemBlock, and is linked into
1085 * Check the texobj base address corresponds to the MemBlock
1086 * range. Check the texobj size (recalculate?) fits within
1089 * Count the number of texobj's using this heap.
1092 foreach ( t
, &heap
->texture_objects
) {
1093 if ( !check_in_heap( t
, heap
) ) {
1094 fprintf( stderr
, "%s memory block for texture object @ %p not "
1095 "found in heap #%d\n",
1096 __FUNCTION__
, (void *)t
, i
);
1101 if ( t
->totalSize
> t
->memBlock
->size
) {
1102 fprintf( stderr
, "%s: Memory block for texture object @ %p is "
1103 "only %u bytes, but %u are required\n",
1104 __FUNCTION__
, (void *)t
, t
->totalSize
, t
->memBlock
->size
);
1111 /* Validate the contents of the heap:
1117 while ( p
!= NULL
) {
1119 fprintf( stderr
, "%s: Block (%08x,%x), is reserved?!\n",
1120 __FUNCTION__
, p
->ofs
, p
->size
);
1124 if (p
->ofs
!= last_end
) {
1125 fprintf( stderr
, "%s: blocks_in_mempool = %d, last_end = %d, p->ofs = %d\n",
1126 __FUNCTION__
, blocks_in_mempool
, last_end
, p
->ofs
);
1130 if (!p
->reserved
&& !p
->free
) {
1131 blocks_in_mempool
++;
1134 last_end
= p
->ofs
+ p
->size
;
1138 if (textures_in_heap
!= blocks_in_mempool
) {
1139 fprintf( stderr
, "%s: Different number of textures objects (%u) and "
1140 "inuse memory blocks (%u)\n",
1141 __FUNCTION__
, textures_in_heap
, blocks_in_mempool
);
1146 fprintf( stderr
, "%s: textures_in_heap = %u\n",
1147 __FUNCTION__
, textures_in_heap
);
1152 /* Check swapped texobj's have zero memblocks
1155 foreach ( t
, swapped
) {
1156 if ( t
->memBlock
!= NULL
) {
1157 fprintf( stderr
, "%s: Swapped texobj %p has non-NULL memblock %p\n",
1158 __FUNCTION__
, (void *)t
, (void *)t
->memBlock
);
1165 fprintf( stderr
, "%s: swapped texture count = %u\n", __FUNCTION__
, i
);
1174 /****************************************************************************/
1176 * Compute which mipmap levels that really need to be sent to the hardware.
1177 * This depends on the base image size, GL_TEXTURE_MIN_LOD,
1178 * GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, and GL_TEXTURE_MAX_LEVEL.
1182 driCalculateTextureFirstLastLevel( driTextureObject
* t
)
1184 struct gl_texture_object
* const tObj
= t
->tObj
;
1185 const struct gl_texture_image
* const baseImage
=
1186 tObj
->Image
[0][tObj
->BaseLevel
];
1188 /* These must be signed values. MinLod and MaxLod can be negative numbers,
1189 * and having firstLevel and lastLevel as signed prevents the need for
1190 * extra sign checks.
1195 /* Yes, this looks overly complicated, but it's all needed.
1198 switch (tObj
->Target
) {
1202 case GL_TEXTURE_CUBE_MAP
:
1203 if (tObj
->MinFilter
== GL_NEAREST
|| tObj
->MinFilter
== GL_LINEAR
) {
1204 /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
1207 firstLevel
= lastLevel
= tObj
->BaseLevel
;
1210 firstLevel
= tObj
->BaseLevel
+ (GLint
)(tObj
->MinLod
+ 0.5);
1211 firstLevel
= MAX2(firstLevel
, tObj
->BaseLevel
);
1212 lastLevel
= tObj
->BaseLevel
+ (GLint
)(tObj
->MaxLod
+ 0.5);
1213 lastLevel
= MAX2(lastLevel
, t
->tObj
->BaseLevel
);
1214 lastLevel
= MIN2(lastLevel
, t
->tObj
->BaseLevel
+ baseImage
->MaxLog2
);
1215 lastLevel
= MIN2(lastLevel
, t
->tObj
->MaxLevel
);
1216 lastLevel
= MAX2(firstLevel
, lastLevel
); /* need at least one level */
1219 case GL_TEXTURE_RECTANGLE_NV
:
1220 case GL_TEXTURE_4D_SGIS
:
1221 firstLevel
= lastLevel
= 0;
1227 /* save these values */
1228 t
->firstLevel
= firstLevel
;
1229 t
->lastLevel
= lastLevel
;
1236 * \name DRI texture formats. Pointers initialized to either the big- or
1237 * little-endian Mesa formats.
1240 const struct gl_texture_format
*_dri_texformat_rgba8888
= NULL
;
1241 const struct gl_texture_format
*_dri_texformat_argb8888
= NULL
;
1242 const struct gl_texture_format
*_dri_texformat_rgb565
= NULL
;
1243 const struct gl_texture_format
*_dri_texformat_argb4444
= NULL
;
1244 const struct gl_texture_format
*_dri_texformat_argb1555
= NULL
;
1245 const struct gl_texture_format
*_dri_texformat_al88
= NULL
;
1246 const struct gl_texture_format
*_dri_texformat_a8
= &_mesa_texformat_a8
;
1247 const struct gl_texture_format
*_dri_texformat_ci8
= &_mesa_texformat_ci8
;
1248 const struct gl_texture_format
*_dri_texformat_i8
= &_mesa_texformat_i8
;
1249 const struct gl_texture_format
*_dri_texformat_l8
= &_mesa_texformat_l8
;
1254 * Initialize little endian target, host byte order independent texture formats
1257 driInitTextureFormats(void)
1259 const GLuint ui
= 1;
1260 const GLubyte littleEndian
= *((const GLubyte
*) &ui
);
1263 _dri_texformat_rgba8888
= &_mesa_texformat_rgba8888
;
1264 _dri_texformat_argb8888
= &_mesa_texformat_argb8888
;
1265 _dri_texformat_rgb565
= &_mesa_texformat_rgb565
;
1266 _dri_texformat_argb4444
= &_mesa_texformat_argb4444
;
1267 _dri_texformat_argb1555
= &_mesa_texformat_argb1555
;
1268 _dri_texformat_al88
= &_mesa_texformat_al88
;
1271 _dri_texformat_rgba8888
= &_mesa_texformat_rgba8888_rev
;
1272 _dri_texformat_argb8888
= &_mesa_texformat_argb8888_rev
;
1273 _dri_texformat_rgb565
= &_mesa_texformat_rgb565_rev
;
1274 _dri_texformat_argb4444
= &_mesa_texformat_argb4444_rev
;
1275 _dri_texformat_argb1555
= &_mesa_texformat_argb1555_rev
;
1276 _dri_texformat_al88
= &_mesa_texformat_al88_rev
;