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-rw-r--r--src/gallium/auxiliary/util/u_surfaces.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_surfaces.c b/src/gallium/auxiliary/util/u_surfaces.c
new file mode 100644
index 00000000000..668da8c5c27
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_surfaces.c
@@ -0,0 +1,112 @@
+#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 *)(((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;
+ }
+ }
+}