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#include "u_surfaces.h"
#include "util/u_hash_table.h"
#include "util/u_inlines.h"
#include "util/u_memory.h"
/* TODO: ouch, util_hash_table should do these by default when passed a null function pointer
* this indirect function call is quite bad
*/
static unsigned
hash(void *key)
{
return (unsigned)(uintptr_t)key;
}
static int
compare(void *key1, void *key2)
{
return (unsigned)(uintptr_t)key1 - (unsigned)(uintptr_t)key2;
}
struct pipe_surface *
util_surfaces_do_get(struct util_surfaces *us, unsigned surface_struct_size, struct pipe_screen *pscreen, struct pipe_resource *pt, unsigned face, unsigned level, unsigned zslice, unsigned flags)
{
struct pipe_surface *ps;
void *key = NULL;
if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
{ /* or 2D array */
if(!us->u.table)
us->u.table = util_hash_table_create(hash, compare);
key = (void *)(uintptr_t)(((zslice + face) << 8) | level);
/* TODO: ouch, should have a get-reference function...
* also, shouldn't allocate a two-pointer structure for each item... */
ps = util_hash_table_get(us->u.table, key);
}
else
{
if(!us->u.array)
us->u.array = CALLOC(pt->last_level + 1, sizeof(struct pipe_surface *));
ps = us->u.array[level];
}
if(ps)
{
p_atomic_inc(&ps->reference.count);
return ps;
}
ps = (struct pipe_surface *)CALLOC(1, surface_struct_size);
if(!ps)
return NULL;
pipe_surface_init(ps, pt, face, level, zslice, flags);
ps->offset = ~0;
if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
util_hash_table_set(us->u.table, key, ps);
else
us->u.array[level] = ps;
return ps;
}
void
util_surfaces_do_detach(struct util_surfaces *us, struct pipe_surface *ps)
{
struct pipe_resource *pt = ps->texture;
if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
{ /* or 2D array */
void* key = (void*)(uintptr_t)(((ps->zslice + ps->face) << 8) | ps->level);
util_hash_table_remove(us->u.table, key);
}
else
us->u.array[ps->level] = 0;
}
static enum pipe_error
util_surfaces_destroy_callback(void *key, void *value, void *data)
{
void (*destroy_surface) (struct pipe_surface * ps) = data;
destroy_surface((struct pipe_surface *)value);
return PIPE_OK;
}
void
util_surfaces_destroy(struct util_surfaces *us, struct pipe_resource *pt, void (*destroy_surface) (struct pipe_surface *))
{
if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
{ /* or 2D array */
if(us->u.table)
{
util_hash_table_foreach(us->u.table, util_surfaces_destroy_callback, destroy_surface);
util_hash_table_destroy(us->u.table);
us->u.table = NULL;
}
}
else
{
if(us->u.array)
{
unsigned i;
for(i = 0; i <= pt->last_level; ++i)
{
struct pipe_surface *ps = us->u.array[i];
if(ps)
destroy_surface(ps);
}
FREE(us->u.array);
us->u.array = NULL;
}
}
}
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