src/mesa/drivers/dri/i915/intel_texmem.c

   1 #include "texmem.h"
   2 #include "simple_list.h"
   3 #include "imports.h"
   4 #include "macros.h"
   5
   6 #include "intel_tex.h"
   7
   8 static GLuint
   9 driLog2( GLuint n )
  10 {
  11    GLuint log2;
  12
  13    for ( log2 = 1 ; n > 1 ; log2++ ) {
  14       n >>= 1;
  15    }
  16
  17    return log2;
  18 }
  19
  20 static void calculate_heap_size( driTexHeap * heap, unsigned size,
  21                                  unsigned nr_regions, unsigned alignmentShift )
  22 {
  23    unsigned     l;
  24
  25    l = driLog2( (size - 1) / nr_regions );
  26    if ( l < alignmentShift )
  27    {
  28       l = alignmentShift;
  29    }
  30
  31    heap->logGranularity = l;
  32    heap->size = size & ~((1L << l) - 1);
  33 }
  34
  35
  36 GLboolean
  37 intel_driReinitTextureHeap( driTexHeap *heap,
  38                             unsigned size )
  39 {
  40    driTextureObject *t, *tmp;
  41
  42    /* Kick out everything:
  43     */
  44    foreach_s ( t, tmp, & heap->texture_objects ) {
  45       if ( t->tObj != NULL ) {
  46          driSwapOutTextureObject( t );
  47       }
  48       else {
  49          driDestroyTextureObject( t );
  50       }
  51    }
  52
  53    /* Destroy the memory manager:
  54     */
  55    mmDestroy( heap->memory_heap );
  56
  57    /* Recreate the memory manager:
  58     */
  59    calculate_heap_size(heap, size, heap->nrRegions, heap->alignmentShift);
  60    heap->memory_heap = mmInit( 0, heap->size );
  61    if ( heap->memory_heap == NULL ) {
  62       fprintf(stderr, "driReinitTextureHeap: couldn't recreate memory heap\n");
  63       FREE( heap );
  64       return GL_FALSE;
  65    }
  66
  67    make_empty_list( & heap->texture_objects );
  68
  69    return GL_TRUE;
  70 }
  71
  72