75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
//
|
|
// fiv-thumbnail.h: thumbnail management
|
|
//
|
|
// Copyright (c) 2021 - 2022, Přemysl Eric Janouch <p@janouch.name>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
|
|
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
|
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
//
|
|
|
|
#pragma once
|
|
|
|
#include <cairo.h>
|
|
#include <gio/gio.h>
|
|
#include <glib.h>
|
|
|
|
// And this is how you avoid glib-mkenums.
|
|
typedef enum _FivThumbnailSize {
|
|
#define FIV_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_THUMBNAIL_SIZE_ ## name,
|
|
FIV_THUMBNAIL_SIZES(XX)
|
|
#undef XX
|
|
FIV_THUMBNAIL_SIZE_COUNT,
|
|
|
|
FIV_THUMBNAIL_SIZE_MIN = 0,
|
|
FIV_THUMBNAIL_SIZE_MAX = FIV_THUMBNAIL_SIZE_COUNT - 1
|
|
} FivThumbnailSize;
|
|
|
|
GType fiv_thumbnail_size_get_type(void) G_GNUC_CONST;
|
|
#define FIV_TYPE_THUMBNAIL_SIZE (fiv_thumbnail_size_get_type())
|
|
|
|
typedef struct _FivThumbnailSizeInfo {
|
|
int size; ///< Nominal size in pixels
|
|
const char *thumbnail_spec_name; ///< thumbnail-spec directory name
|
|
} FivThumbnailSizeInfo;
|
|
|
|
enum { FIV_THUMBNAIL_WIDE_COEFFICIENT = 2 };
|
|
|
|
extern FivThumbnailSizeInfo fiv_thumbnail_sizes[FIV_THUMBNAIL_SIZE_COUNT];
|
|
|
|
/// If non-NULL, indicates a thumbnail of insufficient quality.
|
|
extern cairo_user_data_key_t fiv_thumbnail_key_lq;
|
|
|
|
/// Returns this user's root thumbnail directory.
|
|
gchar *fiv_thumbnail_get_root(void);
|
|
|
|
/// Attempts to extract any low-quality thumbnail from fast targets.
|
|
/// If `max_size` is a valid value, the image will be downscaled as appropriate.
|
|
cairo_surface_t *fiv_thumbnail_extract(
|
|
GFile *target, FivThumbnailSize max_size, GError **error);
|
|
|
|
/// Generates wide thumbnails of up to the specified size, saves them in cache.
|
|
/// Returns the surface used for the maximum size, or an error.
|
|
cairo_surface_t *fiv_thumbnail_produce(
|
|
GFile *target, FivThumbnailSize max_size, GError **error);
|
|
|
|
/// Retrieves a thumbnail of the most appropriate quality and resolution
|
|
/// for the target file.
|
|
cairo_surface_t *fiv_thumbnail_lookup(
|
|
char *uri, gint64 mtime_msec, FivThumbnailSize size);
|
|
|
|
/// Invalidate the wide thumbnail cache. May write to standard streams.
|
|
void fiv_thumbnail_invalidate(void);
|