static fz_pixmap *
pdf_image_get_pixmap(fz_context *ctx, fz_image *image_, int w, int h)
{
pdf_image *image = (pdf_image *)image_;
fz_pixmap *tile;
fz_stream *stm;
int l2factor;
pdf_image_key key;
int native_l2factor;
int indexed;
/* Check for 'simple' images which are just pixmaps */
if (image->buffer == NULL)
{
tile = image->tile;
if (!tile)
return NULL;
return fz_keep_pixmap(ctx, tile); /* That's all we can give you! */
}
/* Ensure our expectations for tile size are reasonable */
if (w > image->base.w)
w = image->base.w;
if (h > image->base.h)
h = image->base.h;
/* What is our ideal factor? */
if (w == 0 || h == 0)
l2factor = 0;
else
for (l2factor=0; image->base.w>>(l2factor+1) >= w && image->base.h>>(l2factor+1) >= h && l2factor < 8; l2factor++);
/* Can we find any suitable tiles in the cache? */
key.refs = 1;
key.image = &image->base;
key.l2factor = l2factor;
do
{
tile = fz_find_item(ctx, fz_free_pixmap_imp, &key, &pdf_image_store_type);
if (tile)
return tile;
key.l2factor--;
}
while (key.l2factor >= 0);
/* We need to make a new one. */
native_l2factor = l2factor;
stm = fz_open_image_decomp_stream(ctx, image->buffer, &native_l2factor);
indexed = fz_colorspace_is_indexed(image->base.colorspace);
return decomp_image_from_stream(ctx, stm, image, 0, indexed, l2factor, native_l2factor, 1);
}
static fz_pixmap *
pdf_image_get_pixmap(fz_context *ctx, fz_image *image_, int w, int h)
{
pdf_image *image = (pdf_image *)image_;
fz_pixmap *tile;
fz_stream *stm;
int factor;
pdf_image_key key;
/* Check for 'simple' images which are just pixmaps */
/* SumatraPDF: don't produce additional tiles for preloaded images */
if (image->tile || !image->buffer)
{
tile = image->tile;
if (!tile)
return NULL;
return fz_keep_pixmap(ctx, tile); /* That's all we can give you! */
}
/* Ensure our expectations for tile size are reasonable */
if (w > image->base.w)
w = image->base.w;
if (h > image->base.h)
h = image->base.h;
/* What is our ideal factor? */
if (w == 0 || h == 0)
factor = 1;
else
for (factor=1; image->base.w/(2*factor) >= w && image->base.h/(2*factor) >= h && factor < 8; factor *= 2);
/* Can we find any suitable tiles in the cache? */
key.refs = 1;
key.image = &image->base;
key.factor = factor;
do
{
tile = fz_find_item(ctx, fz_free_pixmap_imp, &key, &pdf_image_store_type);
if (tile)
return tile;
key.factor >>= 1;
}
while (key.factor > 0);
/* We need to make a new one. */
stm = pdf_open_image_decomp_stream(ctx, image->buffer, &image->params, &factor);
return decomp_image_from_stream(ctx, stm, image, 0, 0, factor, 0);
}
pdf_font_desc *
pdf_load_hail_mary_font(pdf_document *doc)
{
fz_context *ctx = doc->ctx;
pdf_font_desc *fontdesc;
pdf_font_desc *existing;
if ((fontdesc = fz_find_item(ctx, pdf_free_font_imp, &hail_mary_store_type, &hail_mary_store_type)))
{
return fontdesc;
}
/* FIXME: Get someone with a clue about fonts to fix this */
fontdesc = pdf_load_simple_font_by_name(doc, NULL, "Helvetica");
existing = fz_store_item(ctx, &hail_mary_store_type, fontdesc, fontdesc->size, &hail_mary_store_type);
assert(existing == NULL);
return fontdesc;
}
void *
pdf_find_item(fz_context *ctx, fz_store_free_fn *free, pdf_obj *key)
{
return fz_find_item(ctx, free, key, &pdf_obj_store_type);
}
fz_pixmap *
fz_image_get_pixmap(fz_context *ctx, fz_image *image, int w, int h)
{
fz_pixmap *tile;
fz_stream *stm;
int l2factor;
fz_image_key key;
int native_l2factor;
int indexed;
fz_image_key *keyp;
/* Check for 'simple' images which are just pixmaps */
if (image->buffer == NULL)
{
tile = image->tile;
if (!tile)
return NULL;
return fz_keep_pixmap(ctx, tile); /* That's all we can give you! */
}
/* Ensure our expectations for tile size are reasonable */
if (w > image->w)
w = image->w;
if (h > image->h)
h = image->h;
/* What is our ideal factor? */
if (w == 0 || h == 0)
l2factor = 0;
else
for (l2factor=0; image->w>>(l2factor+1) >= w && image->h>>(l2factor+1) >= h && l2factor < 8; l2factor++);
/* Can we find any suitable tiles in the cache? */
key.refs = 1;
key.image = image;
key.l2factor = l2factor;
do
{
tile = fz_find_item(ctx, fz_free_pixmap_imp, &key, &fz_image_store_type);
if (tile)
return tile;
key.l2factor--;
}
while (key.l2factor >= 0);
/* We need to make a new one. */
/* First check for ones that we can't decode using streams */
switch (image->buffer->params.type)
{
case FZ_IMAGE_PNG:
tile = fz_load_png(ctx, image->buffer->buffer->data, image->buffer->buffer->len);
break;
case FZ_IMAGE_TIFF:
tile = fz_load_tiff(ctx, image->buffer->buffer->data, image->buffer->buffer->len);
break;
default:
native_l2factor = l2factor;
stm = fz_open_image_decomp_stream(ctx, image->buffer, &native_l2factor);
indexed = fz_colorspace_is_indexed(image->colorspace);
tile = fz_decomp_image_from_stream(ctx, stm, image, 0, indexed, l2factor, native_l2factor);
break;
}
/* Now we try to cache the pixmap. Any failure here will just result
* in us not caching. */
fz_var(keyp);
fz_try(ctx)
{
fz_pixmap *existing_tile;
keyp = fz_malloc_struct(ctx, fz_image_key);
keyp->refs = 1;
keyp->image = fz_keep_image(ctx, image);
keyp->l2factor = l2factor;
existing_tile = fz_store_item(ctx, keyp, tile, fz_pixmap_size(ctx, tile), &fz_image_store_type);
if (existing_tile)
{
/* We already have a tile. This must have been produced by a
* racing thread. We'll throw away ours and use that one. */
fz_drop_pixmap(ctx, tile);
tile = existing_tile;
}
}
fz_always(ctx)
{
fz_drop_image_key(ctx, keyp);
}
fz_catch(ctx)
{
/* Do nothing */
}
return tile;
}
void *
pdf_find_item(fz_context *ctx, fz_store_drop_fn *drop, pdf_obj *key)
{
return fz_find_item(ctx, drop, key, &pdf_obj_store_type);
}
