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//
// fastiv-io.h: image loaders
//
// Copyright (c) 2021, 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 <glib.h>
#include <gio/gio.h>
extern const char *fastiv_io_supported_media_types[];
char **fastiv_io_all_supported_media_types(void);
// Userdata are typically attached to all Cairo surfaces in an animation.
/// GBytes with plain Exif/TIFF data.
extern cairo_user_data_key_t fastiv_io_key_exif;
/// FastivIoOrientation, as a uintptr_t.
extern cairo_user_data_key_t fastiv_io_key_orientation;
/// GBytes with plain ICC profile data.
extern cairo_user_data_key_t fastiv_io_key_icc;
/// The next frame in a sequence, as a surface, in a chain, pre-composited.
/// There is no wrap-around.
extern cairo_user_data_key_t fastiv_io_key_frame_next;
/// The previous frame in a sequence, as a surface, in a chain, pre-composited.
/// This is a weak pointer that wraps around, and needn't be present
/// for static images.
extern cairo_user_data_key_t fastiv_io_key_frame_previous;
/// Frame duration in milliseconds as an intptr_t.
extern cairo_user_data_key_t fastiv_io_key_frame_duration;
/// How many times to repeat the animation, or zero for +inf, as a uintptr_t.
extern cairo_user_data_key_t fastiv_io_key_loops;
/// The first frame of the next page, as a surface, in a chain.
/// There is no wrap-around.
extern cairo_user_data_key_t fastiv_io_key_page_next;
/// The first frame of the previous page, as a surface, in a chain.
/// There is no wrap-around. This is a weak pointer.
extern cairo_user_data_key_t fastiv_io_key_page_previous;
cairo_surface_t *fastiv_io_open(const gchar *path, GError **error);
cairo_surface_t *fastiv_io_open_from_data(
const char *data, size_t len, const gchar *path, GError **error);
int fastiv_io_filecmp(GFile *f1, GFile *f2);
// --- Metadata ----------------------------------------------------------------
// https://www.cipa.jp/std/documents/e/DC-008-2012_E.pdf Table 6
typedef enum _FastivIoOrientation {
FastivIoOrientationUnknown = 0,
FastivIoOrientation0 = 1,
FastivIoOrientationMirror0 = 2,
FastivIoOrientation180 = 3,
FastivIoOrientationMirror180 = 4,
FastivIoOrientationMirror270 = 5,
FastivIoOrientation90 = 6,
FastivIoOrientationMirror90 = 7,
FastivIoOrientation270 = 8
} FastivIoOrientation;
FastivIoOrientation fastiv_io_exif_orientation(const guint8 *exif, gsize len);
// --- Thumbnails --------------------------------------------------------------
// And this is how you avoid glib-mkenums.
typedef enum _FastivIoThumbnailSize {
#define FASTIV_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) FASTIV_IO_THUMBNAIL_SIZE_ ## name,
FASTIV_IO_THUMBNAIL_SIZES(XX)
#undef XX
FASTIV_IO_THUMBNAIL_SIZE_COUNT,
FASTIV_IO_THUMBNAIL_SIZE_MIN = 0,
FASTIV_IO_THUMBNAIL_SIZE_MAX = FASTIV_IO_THUMBNAIL_SIZE_COUNT - 1
} FastivIoThumbnailSize;
GType fastiv_io_thumbnail_size_get_type(void) G_GNUC_CONST;
#define FASTIV_TYPE_IO_THUMBNAIL_SIZE (fastiv_io_thumbnail_size_get_type())
typedef struct _FastivIoThumbnailSizeInfo {
int size; ///< Nominal size in pixels
const char *thumbnail_spec_name; ///< thumbnail-spec directory name
} FastivIoThumbnailSizeInfo;
extern FastivIoThumbnailSizeInfo
fastiv_io_thumbnail_sizes[FASTIV_IO_THUMBNAIL_SIZE_COUNT];
cairo_surface_t *fastiv_io_lookup_thumbnail(
GFile *target, FastivIoThumbnailSize size);
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