2 * Copyright (C) 20019 - The Geeqie Team
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include "image-load.h"
24 #include "image-load-heif.h"
27 #include <libheif/heif.h>
29 struct ImageLoaderHEIF {
30 ImageLoaderBackendCbAreaUpdated area_updated_cb;
31 ImageLoaderBackendCbSize size_cb;
32 ImageLoaderBackendCbAreaPrepared area_prepared_cb;
35 guint requested_width;
36 guint requested_height;
42 static void free_buffer(guchar *, gpointer data)
44 heif_image_release(static_cast<const struct heif_image*>(data));
47 static gboolean image_loader_heif_load(gpointer loader, const guchar *buf, gsize count, GError **)
49 auto ld = static_cast<ImageLoaderHEIF *>(loader);
50 struct heif_context* ctx;
51 struct heif_image* img;
52 struct heif_error error_code;
53 struct heif_image_handle* handle;
60 ctx = heif_context_alloc();
62 error_code = heif_context_read_from_memory_without_copy(ctx, buf, count, nullptr);
65 log_printf("warning: heif reader error: %s\n", error_code.message);
66 heif_context_free(ctx);
71 page_total = heif_context_get_number_of_top_level_images(ctx);
72 ld->page_total = page_total;
74 std::vector<heif_item_id> IDs(page_total);
76 /* get list of all (top level) image IDs */
77 heif_context_get_list_of_top_level_image_IDs(ctx, IDs.data(), page_total);
79 error_code = heif_context_get_image_handle(ctx, IDs[ld->page_num], &handle);
82 log_printf("warning: heif reader error: %s\n", error_code.message);
83 heif_context_free(ctx);
87 // decode the image and convert colorspace to RGB, saved as 24bit interleaved
88 error_code = heif_decode_image(handle, &img, heif_colorspace_RGB, heif_chroma_interleaved_24bit, nullptr);
91 log_printf("warning: heif reader error: %s\n", error_code.message);
92 heif_context_free(ctx);
96 data = heif_image_get_plane(img, heif_channel_interleaved, &stride);
98 height = heif_image_get_height(img,heif_channel_interleaved);
99 width = heif_image_get_width(img,heif_channel_interleaved);
100 alpha = heif_image_handle_has_alpha_channel(handle);
101 heif_image_handle_release(handle);
103 ld->pixbuf = gdk_pixbuf_new_from_data(data, GDK_COLORSPACE_RGB, alpha, 8, width, height, stride, free_buffer, img);
105 ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
108 heif_context_free(ctx);
113 static gpointer image_loader_heif_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
115 auto loader = g_new0(ImageLoaderHEIF, 1);
116 loader->area_updated_cb = area_updated_cb;
117 loader->size_cb = size_cb;
118 loader->area_prepared_cb = area_prepared_cb;
120 loader->page_num = 0;
124 static void image_loader_heif_set_size(gpointer loader, int width, int height)
126 auto ld = static_cast<ImageLoaderHEIF *>(loader);
127 ld->requested_width = width;
128 ld->requested_height = height;
131 static GdkPixbuf* image_loader_heif_get_pixbuf(gpointer loader)
133 auto ld = static_cast<ImageLoaderHEIF *>(loader);
137 static gchar* image_loader_heif_get_format_name(gpointer)
139 return g_strdup("heif");
142 static gchar** image_loader_heif_get_format_mime_types(gpointer)
144 static const gchar *mime[] = {"image/heic", nullptr};
145 return g_strdupv(const_cast<gchar **>(mime));
148 static void image_loader_heif_set_page_num(gpointer loader, gint page_num)
150 auto ld = static_cast<ImageLoaderHEIF *>(loader);
152 ld->page_num = page_num;
155 static gint image_loader_heif_get_page_total(gpointer loader)
157 auto ld = static_cast<ImageLoaderHEIF *>(loader);
159 return ld->page_total;
162 static gboolean image_loader_heif_close(gpointer, GError **)
167 static void image_loader_heif_abort(gpointer loader)
169 auto ld = static_cast<ImageLoaderHEIF *>(loader);
173 static void image_loader_heif_free(gpointer loader)
175 auto ld = static_cast<ImageLoaderHEIF *>(loader);
176 if (ld->pixbuf) g_object_unref(ld->pixbuf);
180 void image_loader_backend_set_heif(ImageLoaderBackend *funcs)
182 funcs->loader_new = image_loader_heif_new;
183 funcs->set_size = image_loader_heif_set_size;
184 funcs->load = image_loader_heif_load;
185 funcs->write = nullptr;
186 funcs->get_pixbuf = image_loader_heif_get_pixbuf;
187 funcs->close = image_loader_heif_close;
188 funcs->abort = image_loader_heif_abort;
189 funcs->free = image_loader_heif_free;
190 funcs->get_format_name = image_loader_heif_get_format_name;
191 funcs->get_format_mime_types = image_loader_heif_get_format_mime_types;
192 funcs->set_page_num = image_loader_heif_set_page_num;
193 funcs->get_page_total = image_loader_heif_get_page_total;
197 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */