src/image_load_heif.c

   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 "main.h"
  22
  23 #include "image-load.h"
  24 #include "image_load_heif.h"
  25
  26 #ifdef HAVE_HEIF
  27 #include <libheif/heif.h>
  28
  29 typedef struct _ImageLoaderHEIF ImageLoaderHEIF;
  30 struct _ImageLoaderHEIF {
  31         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  32         ImageLoaderBackendCbSize size_cb;
  33         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  34         gpointer data;
  35         GdkPixbuf *pixbuf;
  36         guint requested_width;
  37         guint requested_height;
  38         gboolean abort;
  39         gint page_num;
  40         gint page_total;
  41 };
  42
  43 static void free_buffer(guchar *pixels, gpointer data)
  44 {
  45         g_free (pixels);
  46 }
  47
  48 static gboolean image_loader_heif_load(gpointer loader, const guchar *buf, gsize count, GError **error)
  49 {
  50         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
  51         struct heif_context* ctx;
  52         struct heif_image* img;
  53         struct heif_error error_code;
  54         struct heif_image_handle* handle;
  55         guint8* data;
  56         gint width, height;
  57         gint stride;
  58         gboolean alpha;
  59         gint page_total;
  60
  61         ctx = heif_context_alloc();
  62
  63         error_code = heif_context_read_from_memory_without_copy(ctx, buf, count, NULL);
  64         if (error_code.code)
  65                 {
  66                 log_printf("warning: heif reader error: %s\n", error_code.message);
  67                 heif_context_free(ctx);
  68                 return FALSE;
  69                 }
  70         else
  71                 {
  72                 page_total = heif_context_get_number_of_top_level_images(ctx);
  73                 ld->page_total = page_total;
  74
  75                 guint32 IDs[page_total * sizeof(guint32)];
  76
  77                 /* get list of all (top level) image IDs */
  78                 heif_context_get_list_of_top_level_image_IDs(ctx, IDs, page_total);
  79
  80                 error_code = heif_context_get_image_handle(ctx, IDs[ld->page_num], &handle);
  81                 if (error_code.code)
  82                         {
  83                         log_printf("warning:  heif reader error: %s\n", error_code.message);
  84                         heif_context_free(ctx);
  85                         return FALSE;
  86                         }
  87
  88                 // decode the image and convert colorspace to RGB, saved as 24bit interleaved
  89                 error_code = heif_decode_image(handle, &img, heif_colorspace_RGB, heif_chroma_interleaved_24bit, NULL);
  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                 data = heif_image_get_plane(img, heif_channel_interleaved, &stride);
  98
  99                 height = heif_image_get_height(img,heif_channel_interleaved);
 100                 width = heif_image_get_width(img,heif_channel_interleaved);
 101                 alpha = heif_image_handle_has_alpha_channel(handle);
 102
 103                 ld->pixbuf = gdk_pixbuf_new_from_data(data, GDK_COLORSPACE_RGB, alpha, 8, width, height, stride, free_buffer, NULL);
 104
 105                 ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
 106                 }
 107
 108         heif_context_free(ctx);
 109
 110         return TRUE;
 111 }
 112
 113 static gpointer image_loader_heif_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 114 {
 115         ImageLoaderHEIF *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;
 119         loader->data = data;
 120         loader->page_num = 0;
 121         return (gpointer) loader;
 122 }
 123
 124 static void image_loader_heif_set_size(gpointer loader, int width, int height)
 125 {
 126         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
 127         ld->requested_width = width;
 128         ld->requested_height = height;
 129 }
 130
 131 static GdkPixbuf* image_loader_heif_get_pixbuf(gpointer loader)
 132 {
 133         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
 134         return ld->pixbuf;
 135 }
 136
 137 static gchar* image_loader_heif_get_format_name(gpointer loader)
 138 {
 139         return g_strdup("heif");
 140 }
 141
 142 static gchar** image_loader_heif_get_format_mime_types(gpointer loader)
 143 {
 144         static gchar *mime[] = {"image/heic", NULL};
 145         return g_strdupv(mime);
 146 }
 147
 148 static void image_loader_heif_set_page_num(gpointer loader, gint page_num)
 149 {
 150         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
 151
 152         ld->page_num = page_num;
 153 }
 154
 155 static gint image_loader_heif_get_page_total(gpointer loader)
 156 {
 157         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
 158
 159         return ld->page_total;
 160 }
 161
 162 static gboolean image_loader_heif_close(gpointer loader, GError **error)
 163 {
 164         return TRUE;
 165 }
 166
 167 static void image_loader_heif_abort(gpointer loader)
 168 {
 169         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
 170         ld->abort = TRUE;
 171 }
 172
 173 static void image_loader_heif_free(gpointer loader)
 174 {
 175         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
 176         if (ld->pixbuf) g_object_unref(ld->pixbuf);
 177         g_free(ld);
 178 }
 179
 180 void image_loader_backend_set_heif(ImageLoaderBackend *funcs)
 181 {
 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 = NULL;
 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;
 194 }
 195
 196 #endif
 197 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */