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