src/image-load-heif.cc

   1 /*
   2  * Copyright (C) 20019 - The Geeqie Team
   3  *
   4  * Author: Colin Clark
   5  *
   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.
  10  *
  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.
  15  *
  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.
  19  */
  20
  21 #include "image-load-heif.h"
  22
  23 #include <config.h>
  24
  25 #if HAVE_HEIF
  26 #include <vector>
  27
  28 #include <gdk-pixbuf/gdk-pixbuf.h>
  29 #include <glib-object.h>
  30 #include <glib.h>
  31 #include <libheif/heif.h>
  32
  33 #include "debug.h"
  34 #include "image-load.h"
  35
  36 namespace
  37 {
  38
  39 struct ImageLoaderHEIF {
  40         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  41         ImageLoaderBackendCbSize size_cb;
  42         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  43         gpointer data;
  44         GdkPixbuf *pixbuf;
  45         guint requested_width;
  46         guint requested_height;
  47         gboolean abort;
  48         gint page_num;
  49         gint page_total;
  50 };
  51
  52 void free_buffer(guchar *, gpointer data)
  53 {
  54         heif_image_release(static_cast<const struct heif_image*>(data));
  55 }
  56
  57 gboolean image_loader_heif_write(gpointer loader, const guchar *buf, gsize &chunk_size, gsize count, GError **)
  58 {
  59         auto ld = static_cast<ImageLoaderHEIF *>(loader);
  60         struct heif_context* ctx;
  61         struct heif_image* img;
  62         struct heif_error error_code;
  63         struct heif_image_handle* handle;
  64         guint8* data;
  65         gint width;
  66         gint height;
  67         gint stride;
  68         gboolean alpha;
  69         gint page_total;
  70
  71         ctx = heif_context_alloc();
  72
  73         error_code = heif_context_read_from_memory_without_copy(ctx, buf, count, nullptr);
  74         if (error_code.code)
  75                 {
  76                 log_printf("warning: heif reader error: %s\n", error_code.message);
  77                 heif_context_free(ctx);
  78                 return FALSE;
  79                 }
  80
  81         page_total = heif_context_get_number_of_top_level_images(ctx);
  82         ld->page_total = page_total;
  83
  84         std::vector<heif_item_id> IDs(page_total);
  85
  86         /* get list of all (top level) image IDs */
  87         heif_context_get_list_of_top_level_image_IDs(ctx, IDs.data(), page_total);
  88
  89         error_code = heif_context_get_image_handle(ctx, IDs[ld->page_num], &handle);
  90         if (error_code.code)
  91                 {
  92                 log_printf("warning:  heif reader error: %s\n", error_code.message);
  93                 heif_context_free(ctx);
  94                 return FALSE;
  95                 }
  96
  97         // decode the image and convert colorspace to RGB, saved as 24bit interleaved
  98         error_code = heif_decode_image(handle, &img, heif_colorspace_RGB, heif_chroma_interleaved_24bit, nullptr);
  99         if (error_code.code)
 100                 {
 101                 log_printf("warning: heif reader error: %s\n", error_code.message);
 102                 heif_context_free(ctx);
 103                 return FALSE;
 104                 }
 105
 106         data = heif_image_get_plane(img, heif_channel_interleaved, &stride);
 107
 108         height = heif_image_get_height(img,heif_channel_interleaved);
 109         width = heif_image_get_width(img,heif_channel_interleaved);
 110         alpha = heif_image_handle_has_alpha_channel(handle);
 111         heif_image_handle_release(handle);
 112
 113         ld->pixbuf = gdk_pixbuf_new_from_data(data, GDK_COLORSPACE_RGB, alpha, 8, width, height, stride, free_buffer, img);
 114
 115         ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
 116
 117         heif_context_free(ctx);
 118
 119         chunk_size = count;
 120         return TRUE;
 121 }
 122
 123 gpointer image_loader_heif_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 124 {
 125         auto loader = g_new0(ImageLoaderHEIF, 1);
 126         loader->area_updated_cb = area_updated_cb;
 127         loader->size_cb = size_cb;
 128         loader->area_prepared_cb = area_prepared_cb;
 129         loader->data = data;
 130         loader->page_num = 0;
 131         return loader;
 132 }
 133
 134 void image_loader_heif_set_size(gpointer loader, int width, int height)
 135 {
 136         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 137         ld->requested_width = width;
 138         ld->requested_height = height;
 139 }
 140
 141 GdkPixbuf* image_loader_heif_get_pixbuf(gpointer loader)
 142 {
 143         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 144         return ld->pixbuf;
 145 }
 146
 147 gchar* image_loader_heif_get_format_name(gpointer)
 148 {
 149         return g_strdup("heif");
 150 }
 151
 152 gchar** image_loader_heif_get_format_mime_types(gpointer)
 153 {
 154         static const gchar *mime[] = {"image/heic", nullptr};
 155         return g_strdupv(const_cast<gchar **>(mime));
 156 }
 157
 158 void image_loader_heif_set_page_num(gpointer loader, gint page_num)
 159 {
 160         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 161
 162         ld->page_num = page_num;
 163 }
 164
 165 gint image_loader_heif_get_page_total(gpointer loader)
 166 {
 167         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 168
 169         return ld->page_total;
 170 }
 171
 172 gboolean image_loader_heif_close(gpointer, GError **)
 173 {
 174         return TRUE;
 175 }
 176
 177 void image_loader_heif_abort(gpointer loader)
 178 {
 179         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 180         ld->abort = TRUE;
 181 }
 182
 183 void image_loader_heif_free(gpointer loader)
 184 {
 185         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 186         if (ld->pixbuf) g_object_unref(ld->pixbuf);
 187         g_free(ld);
 188 }
 189
 190 } // namespace
 191
 192 void image_loader_backend_set_heif(ImageLoaderBackend *funcs)
 193 {
 194         funcs->loader_new = image_loader_heif_new;
 195         funcs->set_size = image_loader_heif_set_size;
 196         funcs->write = image_loader_heif_write;
 197         funcs->get_pixbuf = image_loader_heif_get_pixbuf;
 198         funcs->close = image_loader_heif_close;
 199         funcs->abort = image_loader_heif_abort;
 200         funcs->free = image_loader_heif_free;
 201         funcs->get_format_name = image_loader_heif_get_format_name;
 202         funcs->get_format_mime_types = image_loader_heif_get_format_mime_types;
 203         funcs->set_page_num = image_loader_heif_set_page_num;
 204         funcs->get_page_total = image_loader_heif_get_page_total;
 205 }
 206
 207 #endif
 208 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */