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#include "config.h"
#include "gskglpathcacheprivate.h"
#include "gskstrokeprivate.h"
#define MAX_UNUSED_FRAMES (16 * 5)
typedef struct
{
GskPath *path;
GskFillRule fill_rule;
const GskStroke *stroke;
guint hash;
GskStroke stroke_copy;
graphene_rect_t bounds;
int texture_id;
int unused_frames;
} CacheItem;
static guint
compute_hash (CacheItem *item)
{
guint hash;
hash = GPOINTER_TO_UINT (item->path);
hash += item->fill_rule;
if (item->stroke)
hash += gsk_stroke_hash (item->stroke);
return hash;
}
static guint
cache_key_hash (gconstpointer v)
{
const CacheItem *item = v;
return item->hash;
}
static gboolean
cache_key_equal (gconstpointer v1,
gconstpointer v2)
{
const CacheItem *item1 = v1;
const CacheItem *item2 = v2;
return item1->path == item2->path &&
item1->fill_rule == item2->fill_rule &&
(item1->stroke == item2->stroke ||
(item1->stroke && item2->stroke &&
gsk_stroke_equal (item1->stroke, item2->stroke)));
}
void
gsk_gl_path_cache_init (GskGLPathCache *self)
{
self->textures = g_hash_table_new_full (cache_key_hash,
cache_key_equal,
NULL,
g_free);
}
void
gsk_gl_path_cache_free (GskGLPathCache *self,
GskGLDriver *gl_driver)
{
GHashTableIter iter;
CacheItem *item;
g_hash_table_iter_init (&iter, self->textures);
while (g_hash_table_iter_next (&iter, NULL, (gpointer *)&item))
{
gsk_gl_driver_destroy_texture (gl_driver, item->texture_id);
}
g_hash_table_unref (self->textures);
self->textures = NULL;
}
void
gsk_gl_path_cache_begin_frame (GskGLPathCache *self,
GskGLDriver *gl_driver)
{
GHashTableIter iter;
CacheItem *item;
g_hash_table_iter_init (&iter, self->textures);
while (g_hash_table_iter_next (&iter, NULL, (gpointer *)&item))
{
if (item->unused_frames > MAX_UNUSED_FRAMES)
{
gsk_gl_driver_destroy_texture (gl_driver, item->texture_id);
g_hash_table_iter_remove (&iter);
}
}
}
int
gsk_gl_path_cache_get_texture_id (GskGLPathCache *self,
GskPath *path,
GskFillRule fill_rule,
const GskStroke *stroke,
graphene_rect_t *out_bounds)
{
CacheItem key;
CacheItem *item;
key.path = path;
key.fill_rule = fill_rule;
key.stroke = stroke;
key.hash = compute_hash (&key);
item = g_hash_table_lookup (self->textures, &key);
if (item == NULL)
return 0;
item->unused_frames = 0;
g_assert (item->texture_id != 0);
*out_bounds = item->bounds;
return item->texture_id;
}
void
gsk_gl_path_cache_commit (GskGLPathCache *self,
GskPath *path,
GskFillRule fill_rule,
const GskStroke *stroke,
int texture_id,
const graphene_rect_t *bounds)
{
CacheItem *item;
g_assert (self != NULL);
g_assert (texture_id > 0);
item = g_new0 (CacheItem, 1);
item->path = path;
item->fill_rule = fill_rule;
if (stroke)
{
gsk_stroke_init_copy (&item->stroke_copy, stroke);
item->stroke = &item->stroke_copy;
}
item->hash = compute_hash (item);
item->unused_frames = 0;
item->texture_id = texture_id;
item->bounds = *bounds;
g_hash_table_add (self->textures, item);
}
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