const dt_image_t*
dt_image_cache_read_testget(
dt_image_cache_t *cache,
const uint32_t imgid)
{
if(imgid <= 0) return NULL;
return (const dt_image_t *)dt_cache_read_testget(&cache->cache, imgid);
}
void
dt_mipmap_cache_read_get(
dt_mipmap_cache_t *cache,
dt_mipmap_buffer_t *buf,
const uint32_t imgid,
const dt_mipmap_size_t mip,
const dt_mipmap_get_flags_t flags)
{
const uint32_t key = get_key(imgid, mip);
if(flags == DT_MIPMAP_TESTLOCK)
{
// simple case: only get and lock if it's there.
struct dt_mipmap_buffer_dsc* dsc = (struct dt_mipmap_buffer_dsc*)dt_cache_read_testget(&cache->mip[mip].cache, key);
if(dsc)
{
buf->width = dsc->width;
buf->height = dsc->height;
buf->imgid = imgid;
buf->size = mip;
// skip to next 8-byte alignment, for sse buffers.
buf->buf = (uint8_t *)(dsc+1);
}
else
{
// set to NULL if failed.
buf->width = buf->height = 0;
buf->imgid = 0;
buf->size = DT_MIPMAP_NONE;
buf->buf = NULL;
}
}
else if(flags == DT_MIPMAP_PREFETCH)
{
// and opposite: prefetch without locking
if(mip > DT_MIPMAP_FULL || mip < DT_MIPMAP_0) return;
dt_job_t j;
dt_image_load_job_init(&j, imgid, mip);
// if the job already exists, make it high-priority, if not, add it:
if(dt_control_revive_job(darktable.control, &j) < 0)
dt_control_add_job(darktable.control, &j);
}
else if(flags == DT_MIPMAP_BLOCKING)
{
// simple case: blocking get
struct dt_mipmap_buffer_dsc* dsc = (struct dt_mipmap_buffer_dsc*)dt_cache_read_get(&cache->mip[mip].cache, key);
if(!dsc)
{
// should never happen for anything but full images which have been moved.
assert(mip == DT_MIPMAP_FULL || mip == DT_MIPMAP_F);
// fprintf(stderr, "[mipmap cache get] no data in cache for imgid %u size %d!\n", imgid, mip);
// sorry guys, no image for you :(
buf->width = buf->height = 0;
buf->imgid = 0;
buf->size = DT_MIPMAP_NONE;
buf->buf = NULL;
}
else
{
// fprintf(stderr, "[mipmap cache get] found data in cache for imgid %u size %d\n", imgid, mip);
// uninitialized?
//assert(dsc->flags & DT_MIPMAP_BUFFER_DSC_FLAG_GENERATE || dsc->size == 0);
if(dsc->flags & DT_MIPMAP_BUFFER_DSC_FLAG_GENERATE)
{
__sync_fetch_and_add (&(cache->mip[mip].stats_fetches), 1);
// fprintf(stderr, "[mipmap cache get] now initializing buffer for img %u mip %d!\n", imgid, mip);
// we're write locked here, as requested by the alloc callback.
// now fill it with data:
if(mip == DT_MIPMAP_FULL)
{
// load the image:
// make sure we access the r/w lock as shortly as possible!
dt_image_t buffered_image;
const dt_image_t *cimg = dt_image_cache_read_get(darktable.image_cache, imgid);
buffered_image = *cimg;
// dt_image_t *img = dt_image_cache_write_get(darktable.image_cache, cimg);
// dt_image_cache_write_release(darktable.image_cache, img, DT_IMAGE_CACHE_RELAXED);
dt_image_cache_read_release(darktable.image_cache, cimg);
char filename[DT_MAX_PATH_LEN];
gboolean from_cache = TRUE;
dt_image_full_path(buffered_image.id, filename, DT_MAX_PATH_LEN, &from_cache);
dt_mipmap_cache_allocator_t a = (dt_mipmap_cache_allocator_t)&dsc;
struct dt_mipmap_buffer_dsc* prvdsc = dsc;
dt_imageio_retval_t ret = dt_imageio_open(&buffered_image, filename, a);
if(dsc != prvdsc)
{
// fprintf(stderr, "[mipmap cache] realloc %p\n", data);
// write back to cache, too.
// in case something went wrong, still keep the buffer and return it to the hashtable
// so we don't produce mem leaks or unnecessary mem fragmentation.
dt_cache_realloc(&cache->mip[mip].cache, key, 1, (void*)dsc);
}
if(ret != DT_IMAGEIO_OK)
{
// fprintf(stderr, "[mipmap read get] error loading image: %d\n", ret);
//
// we can only return a zero dimension buffer if the buffer has been allocated.
// in case dsc couldn't be allocated and points to the static buffer, it contains
// a dead image already.
if((void *)dsc != (void *)dt_mipmap_cache_static_dead_image) dsc->width = dsc->height = 0;
}
else
{
// swap back new image data:
cimg = dt_image_cache_read_get(darktable.image_cache, imgid);
dt_image_t *img = dt_image_cache_write_get(darktable.image_cache, cimg);
*img = buffered_image;
// fprintf(stderr, "[mipmap read get] initializing full buffer img %u with %u %u -> %d %d (%p)\n", imgid, data[0], data[1], img->width, img->height, data);
// don't write xmp for this (we only changed db stuff):
dt_image_cache_write_release(darktable.image_cache, img, DT_IMAGE_CACHE_RELAXED);
dt_image_cache_read_release(darktable.image_cache, img);
}
}
else if(mip == DT_MIPMAP_F)
{
_init_f((float *)(dsc+1), &dsc->width, &dsc->height, imgid);
}
else
{
// 8-bit thumbs, possibly need to be compressed:
if(cache->compression_type)
{
// get per-thread temporary storage without malloc from a separate cache:
const int key = dt_control_get_threadid();
// const void *cbuf =
dt_cache_read_get(&cache->scratchmem.cache, key);
uint8_t *scratchmem = (uint8_t *)dt_cache_write_get(&cache->scratchmem.cache, key);
_init_8(scratchmem, &dsc->width, &dsc->height, imgid, mip);
buf->width = dsc->width;
buf->height = dsc->height;
buf->imgid = imgid;
buf->size = mip;
buf->buf = (uint8_t *)(dsc+1);
dt_mipmap_cache_compress(buf, scratchmem);
dt_cache_write_release(&cache->scratchmem.cache, key);
dt_cache_read_release(&cache->scratchmem.cache, key);
}
else
{
_init_8((uint8_t *)(dsc+1), &dsc->width, &dsc->height, imgid, mip);
}
}
dsc->flags &= ~DT_MIPMAP_BUFFER_DSC_FLAG_GENERATE;
// drop the write lock
dt_cache_write_release(&cache->mip[mip].cache, key);
/* raise signal that mipmaps has been flushed to cache */
dt_control_signal_raise(darktable.signals, DT_SIGNAL_DEVELOP_MIPMAP_UPDATED);
}
buf->width = dsc->width;
buf->height = dsc->height;
buf->imgid = imgid;
buf->size = mip;
buf->buf = (uint8_t *)(dsc+1);
if(dsc->width == 0 || dsc->height == 0)
{
// fprintf(stderr, "[mipmap cache get] got a zero-sized image for img %u mip %d!\n", imgid, mip);
if(mip < DT_MIPMAP_F) dead_image_8(buf);
else if(mip == DT_MIPMAP_F) dead_image_f(buf);
else buf->buf = NULL; // full images with NULL buffer have to be handled, indicates `missing image'
}
}
}
else if(flags == DT_MIPMAP_BEST_EFFORT)
{
__sync_fetch_and_add (&(cache->mip[mip].stats_requests), 1);
// best-effort, might also return NULL.
// never decrease mip level for float buffer or full image:
dt_mipmap_size_t min_mip = (mip >= DT_MIPMAP_F) ? mip : DT_MIPMAP_0;
for(int k=mip; k>=min_mip && k>=0; k--)
{
// already loaded?
dt_mipmap_cache_read_get(cache, buf, imgid, k, DT_MIPMAP_TESTLOCK);
if(buf->buf && buf->width > 0 && buf->height > 0)
{
if(mip != k) __sync_fetch_and_add (&(cache->mip[k].stats_standin), 1);
return;
}
// didn't succeed the first time? prefetch for later!
if(mip == k)
{
__sync_fetch_and_add (&(cache->mip[mip].stats_near_match), 1);
dt_mipmap_cache_read_get(cache, buf, imgid, mip, DT_MIPMAP_PREFETCH);
}
}
__sync_fetch_and_add (&(cache->mip[mip].stats_misses), 1);
// fprintf(stderr, "[mipmap cache get] image not found in cache: imgid %u mip %d!\n", imgid, mip);
// nothing found :(
buf->buf = NULL;
buf->imgid = 0;
buf->size = DT_MIPMAP_NONE;
buf->width = buf->height = 0;
}
}
