diff options
Diffstat (limited to 'fiv-io.h')
| -rw-r--r-- | fiv-io.h | 51 |
1 files changed, 3 insertions, 48 deletions
@@ -31,6 +31,9 @@ FivIoProfile fiv_io_profile_new(const void *data, size_t len); FivIoProfile fiv_io_profile_new_sRGB(void); void fiv_io_profile_free(FivIoProfile self); +// From libwebp, verified to exactly match [x * a / 255]. +#define PREMULTIPLY8(a, x) (((uint32_t) (x) * (uint32_t) (a) * 32897U) >> 23) + // --- Loading ----------------------------------------------------------------- extern const char *fiv_io_supported_media_types[]; @@ -69,9 +72,6 @@ extern cairo_user_data_key_t fiv_io_key_page_next; /// There is no wrap-around. This is a weak pointer. extern cairo_user_data_key_t fiv_io_key_page_previous; -/// If non-NULL, indicates a thumbnail of insufficient quality. -extern cairo_user_data_key_t fiv_io_key_thumbnail_lq; - cairo_surface_t *fiv_io_open( const gchar *path, FivIoProfile profile, gboolean enhance, GError **error); cairo_surface_t *fiv_io_open_from_data(const char *data, size_t len, @@ -113,48 +113,3 @@ FivIoOrientation fiv_io_exif_orientation(const guint8 *exif, gsize len); /// Save metadata attached by this module in Exiv2 format. gboolean fiv_io_save_metadata( cairo_surface_t *page, const gchar *path, GError **error); - -// --- Thumbnails -------------------------------------------------------------- - -// And this is how you avoid glib-mkenums. -typedef enum _FivIoThumbnailSize { -#define FIV_IO_THUMBNAIL_SIZES(XX) \ - XX(SMALL, 128, "normal") \ - XX(NORMAL, 256, "large") \ - XX(LARGE, 512, "x-large") \ - XX(HUGE, 1024, "xx-large") -#define XX(name, value, dir) FIV_IO_THUMBNAIL_SIZE_ ## name, - FIV_IO_THUMBNAIL_SIZES(XX) -#undef XX - FIV_IO_THUMBNAIL_SIZE_COUNT, - - FIV_IO_THUMBNAIL_SIZE_MIN = 0, - FIV_IO_THUMBNAIL_SIZE_MAX = FIV_IO_THUMBNAIL_SIZE_COUNT - 1 -} FivIoThumbnailSize; - -GType fiv_io_thumbnail_size_get_type(void) G_GNUC_CONST; -#define FIV_TYPE_IO_THUMBNAIL_SIZE (fiv_io_thumbnail_size_get_type()) - -typedef struct _FivIoThumbnailSizeInfo { - int size; ///< Nominal size in pixels - const char *thumbnail_spec_name; ///< thumbnail-spec directory name -} FivIoThumbnailSizeInfo; - -extern FivIoThumbnailSizeInfo - fiv_io_thumbnail_sizes[FIV_IO_THUMBNAIL_SIZE_COUNT]; - -enum { - FIV_IO_WIDE_THUMBNAIL_COEFFICIENT = 2 -}; - -/// Returns this user's root thumbnail directory. -gchar *fiv_io_get_thumbnail_root(void); - -/// Generates wide thumbnails of up to the specified size, saves them in cache. -gboolean fiv_io_produce_thumbnail( - GFile *target, FivIoThumbnailSize size, GError **error); - -/// Retrieves a thumbnail of the most appropriate quality and resolution -/// for the target file. -cairo_surface_t *fiv_io_lookup_thumbnail( - GFile *target, FivIoThumbnailSize size); |