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Extract ICC profiles from gdk-pixbuf

This commit is contained in:
Přemysl Eric Janouch 2021-11-26 00:46:00 +01:00
parent f151fcb72b
commit a5f64b1a65
Signed by: p
GPG Key ID: A0420B94F92B9493
2 changed files with 17 additions and 1 deletions
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16
fastiv-io.c
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@ -983,6 +983,8 @@ open_xcursor(const gchar *data, gsize len, GError **error)
static cairo_surface_t * static cairo_surface_t *
open_gdkpixbuf(const gchar *data, gsize len, GError **error) open_gdkpixbuf(const gchar *data, gsize len, GError **error)
{ {
// gdk-pixbuf controls the playback itself, there is no reliable method of
// extracting individual frames (due to loops).
GInputStream *is = g_memory_input_stream_new_from_data(data, len, NULL); GInputStream *is = g_memory_input_stream_new_from_data(data, len, NULL);
GdkPixbuf *pixbuf = gdk_pixbuf_new_from_stream(is, NULL, error); GdkPixbuf *pixbuf = gdk_pixbuf_new_from_stream(is, NULL, error);
g_object_unref(is); g_object_unref(is);
@ -991,6 +993,20 @@ open_gdkpixbuf(const gchar *data, gsize len, GError **error)
cairo_surface_t *surface = cairo_surface_t *surface =
gdk_cairo_surface_create_from_pixbuf(pixbuf, 1, NULL); gdk_cairo_surface_create_from_pixbuf(pixbuf, 1, NULL);
// TODO(p): Also pass the pre-decoded Exif "orientation" option,
// which is an ASCII digit from 1 to 8.
const char *icc_profile = gdk_pixbuf_get_option(pixbuf, "icc-profile");
if (icc_profile) {
gsize out_len = 0;
guchar *raw = g_base64_decode(icc_profile, &out_len);
if (raw) {
cairo_surface_set_user_data(surface, &fastiv_io_key_icc,
g_bytes_new_take(raw, out_len),
(cairo_destroy_func_t) g_bytes_unref);
}
}
g_object_unref(pixbuf); g_object_unref(pixbuf);
return surface; return surface;
} }

2
fastiv-io.h
View File

@ -37,7 +37,7 @@ extern cairo_user_data_key_t fastiv_io_key_icc;
extern cairo_user_data_key_t fastiv_io_key_frame_next; extern cairo_user_data_key_t fastiv_io_key_frame_next;
/// Frame duration in milliseconds as an intptr_t. /// Frame duration in milliseconds as an intptr_t.
extern cairo_user_data_key_t fastiv_io_key_frame_duration; extern cairo_user_data_key_t fastiv_io_key_frame_duration;
/// How many times to repeat the animation, or zero for +inf, as an uintptr_t. /// 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; extern cairo_user_data_key_t fastiv_io_key_loops;
cairo_surface_t *fastiv_io_open(const gchar *path, GError **error); cairo_surface_t *fastiv_io_open(const gchar *path, GError **error);