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Extract HEIF auxiliary subimages

This commit is contained in:
Přemysl Eric Janouch 2021-12-11 16:56:35 +01:00
parent 1cbd0141a1
commit 1bd5cb02e7
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 51 additions and 17 deletions
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68
fastiv-io.c
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@ -1109,15 +1109,8 @@ open_xcursor(const gchar *data, gsize len, GError **error)
#ifdef HAVE_LIBHEIF //---------------------------------------------------------
static cairo_surface_t *
load_libheif_image(struct heif_context *ctx, heif_item_id id, GError **error)
load_libheif_image(struct heif_image_handle *handle, GError **error)
{
struct heif_image_handle *handle = NULL;
struct heif_error err = heif_context_get_image_handle(ctx, id, &handle);
if (err.code != heif_error_Ok) {
set_error(error, err.message);
return NULL;
}
cairo_surface_t *surface = NULL;
int has_alpha = heif_image_handle_has_alpha_channel(handle);
int bit_depth = heif_image_handle_get_luma_bits_per_pixel(handle);
@ -1131,8 +1124,8 @@ load_libheif_image(struct heif_context *ctx, heif_item_id id, GError **error)
// TODO(p): We can get 16-bit depth, in reality most likely 10-bit.
struct heif_image *image = NULL;
err = heif_decode_image(handle, &image, heif_colorspace_RGB,
heif_chroma_interleaved_RGBA, opts);
struct heif_error err = heif_decode_image(handle, &image,
heif_colorspace_RGB, heif_chroma_interleaved_RGBA, opts);
if (err.code != heif_error_Ok) {
set_error(error, err.message);
goto fail_decode;
@ -1141,7 +1134,6 @@ load_libheif_image(struct heif_context *ctx, heif_item_id id, GError **error)
int w = heif_image_get_width(image, heif_channel_interleaved);
int h = heif_image_get_height(image, heif_channel_interleaved);
// TODO(p): Add more pages with depth, thumbnails, and auxiliary images.
surface = cairo_image_surface_create(
has_alpha ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24, w, h);
cairo_status_t surface_status = cairo_surface_status(surface);
@ -1222,10 +1214,41 @@ fail_process:
fail_decode:
heif_decoding_options_free(opts);
fail:
heif_image_handle_release(handle);
return surface;
}
static void
load_libheif_aux_images(const gchar *path, struct heif_image_handle *top,
cairo_surface_t **result, cairo_surface_t **result_tail)
{
// Include the depth image, we have no special processing for it now.
int filter = LIBHEIF_AUX_IMAGE_FILTER_OMIT_ALPHA;
int n = heif_image_handle_get_number_of_auxiliary_images(top, filter);
heif_item_id *ids = g_malloc0_n(n, sizeof *ids);
n = heif_image_handle_get_list_of_auxiliary_image_IDs(top, filter, ids, n);
for (int i = 0; i < n; i++) {
struct heif_image_handle *handle = NULL;
struct heif_error err = heif_image_handle_get_auxiliary_image_handle(
top, ids[i], &handle);
if (err.code != heif_error_Ok) {
g_warning("%s: %s", path, err.message);
continue;
}
GError *e = NULL;
if (!try_append_page(
load_libheif_image(handle, &e), result, result_tail)) {
g_warning("%s: %s", path, e->message);
g_error_free(e);
}
heif_image_handle_release(handle);
}
g_free(ids);
}
static cairo_surface_t *
open_libheif(const gchar *data, gsize len, const gchar *path, GError **error)
{
@ -1245,12 +1268,23 @@ open_libheif(const gchar *data, gsize len, const gchar *path, GError **error)
heif_item_id *ids = g_malloc0_n(n, sizeof *ids);
n = heif_context_get_list_of_top_level_image_IDs(ctx, ids, n);
for (int i = 0; i < n; i++) {
GError *err = NULL;
if (!try_append_page(
load_libheif_image(ctx, ids[i], &err), &result, &result_tail)) {
g_warning("%s: %s", path, err->message);
g_error_free(err);
struct heif_image_handle *handle = NULL;
err = heif_context_get_image_handle(ctx, ids[i], &handle);
if (err.code != heif_error_Ok) {
g_warning("%s: %s", path, err.message);
continue;
}
GError *e = NULL;
if (!try_append_page(
load_libheif_image(handle, &e), &result, &result_tail)) {
g_warning("%s: %s", path, e->message);
g_error_free(e);
}
// TODO(p): Possibly add thumbnail images as well.
load_libheif_aux_images(path, handle, &result, &result_tail);
heif_image_handle_release(handle);
}
if (!result) {
g_clear_pointer(&result, cairo_surface_destroy);