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.
21 #include "image-load-heif.h"
28 #include <gdk-pixbuf/gdk-pixbuf.h>
29 #include <glib-object.h>
31 #include <libheif/heif.h>
34 #include "image-load.h"
36 struct ImageLoaderHEIF {
37 ImageLoaderBackendCbAreaUpdated area_updated_cb;
38 ImageLoaderBackendCbSize size_cb;
39 ImageLoaderBackendCbAreaPrepared area_prepared_cb;
42 guint requested_width;
43 guint requested_height;
49 static void free_buffer(guchar *, gpointer data)
51 heif_image_release(static_cast<const struct heif_image*>(data));
54 static gboolean image_loader_heif_load(gpointer loader, const guchar *buf, gsize count, GError **)
56 auto ld = static_cast<ImageLoaderHEIF *>(loader);
57 struct heif_context* ctx;
58 struct heif_image* img;
59 struct heif_error error_code;
60 struct heif_image_handle* handle;
68 ctx = heif_context_alloc();
70 error_code = heif_context_read_from_memory_without_copy(ctx, buf, count, nullptr);
73 log_printf("warning: heif reader error: %s\n", error_code.message);
74 heif_context_free(ctx);
78 page_total = heif_context_get_number_of_top_level_images(ctx);
79 ld->page_total = page_total;
81 std::vector<heif_item_id> IDs(page_total);
83 /* get list of all (top level) image IDs */
84 heif_context_get_list_of_top_level_image_IDs(ctx, IDs.data(), page_total);
86 error_code = heif_context_get_image_handle(ctx, IDs[ld->page_num], &handle);
89 log_printf("warning: heif reader error: %s\n", error_code.message);
90 heif_context_free(ctx);
94 // decode the image and convert colorspace to RGB, saved as 24bit interleaved
95 error_code = heif_decode_image(handle, &img, heif_colorspace_RGB, heif_chroma_interleaved_24bit, nullptr);
98 log_printf("warning: heif reader error: %s\n", error_code.message);
99 heif_context_free(ctx);
103 data = heif_image_get_plane(img, heif_channel_interleaved, &stride);
105 height = heif_image_get_height(img,heif_channel_interleaved);
106 width = heif_image_get_width(img,heif_channel_interleaved);
107 alpha = heif_image_handle_has_alpha_channel(handle);
108 heif_image_handle_release(handle);
110 ld->pixbuf = gdk_pixbuf_new_from_data(data, GDK_COLORSPACE_RGB, alpha, 8, width, height, stride, free_buffer, img);
112 ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
114 heif_context_free(ctx);
119 static gpointer image_loader_heif_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
121 auto loader = g_new0(ImageLoaderHEIF, 1);
122 loader->area_updated_cb = area_updated_cb;
123 loader->size_cb = size_cb;
124 loader->area_prepared_cb = area_prepared_cb;
126 loader->page_num = 0;
130 static void image_loader_heif_set_size(gpointer loader, int width, int height)
132 auto ld = static_cast<ImageLoaderHEIF *>(loader);
133 ld->requested_width = width;
134 ld->requested_height = height;
137 static GdkPixbuf* image_loader_heif_get_pixbuf(gpointer loader)
139 auto ld = static_cast<ImageLoaderHEIF *>(loader);
143 static gchar* image_loader_heif_get_format_name(gpointer)
145 return g_strdup("heif");
148 static gchar** image_loader_heif_get_format_mime_types(gpointer)
150 static const gchar *mime[] = {"image/heic", nullptr};
151 return g_strdupv(const_cast<gchar **>(mime));
154 static void image_loader_heif_set_page_num(gpointer loader, gint page_num)
156 auto ld = static_cast<ImageLoaderHEIF *>(loader);
158 ld->page_num = page_num;
161 static gint image_loader_heif_get_page_total(gpointer loader)
163 auto ld = static_cast<ImageLoaderHEIF *>(loader);
165 return ld->page_total;
168 static gboolean image_loader_heif_close(gpointer, GError **)
173 static void image_loader_heif_abort(gpointer loader)
175 auto ld = static_cast<ImageLoaderHEIF *>(loader);
179 static void image_loader_heif_free(gpointer loader)
181 auto ld = static_cast<ImageLoaderHEIF *>(loader);
182 if (ld->pixbuf) g_object_unref(ld->pixbuf);
186 void image_loader_backend_set_heif(ImageLoaderBackend *funcs)
188 funcs->loader_new = image_loader_heif_new;
189 funcs->set_size = image_loader_heif_set_size;
190 funcs->load = image_loader_heif_load;
191 funcs->write = nullptr;
192 funcs->get_pixbuf = image_loader_heif_get_pixbuf;
193 funcs->close = image_loader_heif_close;
194 funcs->abort = image_loader_heif_abort;
195 funcs->free = image_loader_heif_free;
196 funcs->get_format_name = image_loader_heif_get_format_name;
197 funcs->get_format_mime_types = image_loader_heif_get_format_mime_types;
198 funcs->set_page_num = image_loader_heif_set_page_num;
199 funcs->get_page_total = image_loader_heif_get_page_total;
203 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */