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 struct ImageLoaderHEIF {
  37         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  38         ImageLoaderBackendCbSize size_cb;
  39         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  40         gpointer data;
  41         GdkPixbuf *pixbuf;
  42         guint requested_width;
  43         guint requested_height;
  44         gboolean abort;
  45         gint page_num;
  46         gint page_total;
  47 };
  48
  49 static void free_buffer(guchar *, gpointer data)
  50 {
  51         heif_image_release(static_cast<const struct heif_image*>(data));
  52 }
  53
  54 static gboolean image_loader_heif_load(gpointer loader, const guchar *buf, gsize count, GError **)
  55 {
  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;
  61         guint8* data;
  62         gint width;
  63         gint height;
  64         gint stride;
  65         gboolean alpha;
  66         gint page_total;
  67
  68         ctx = heif_context_alloc();
  69
  70         error_code = heif_context_read_from_memory_without_copy(ctx, buf, count, nullptr);
  71         if (error_code.code)
  72                 {
  73                 log_printf("warning: heif reader error: %s\n", error_code.message);
  74                 heif_context_free(ctx);
  75                 return FALSE;
  76                 }
  77
  78         page_total = heif_context_get_number_of_top_level_images(ctx);
  79         ld->page_total = page_total;
  80
  81         std::vector<heif_item_id> IDs(page_total);
  82
  83         /* get list of all (top level) image IDs */
  84         heif_context_get_list_of_top_level_image_IDs(ctx, IDs.data(), page_total);
  85
  86         error_code = heif_context_get_image_handle(ctx, IDs[ld->page_num], &handle);
  87         if (error_code.code)
  88                 {
  89                 log_printf("warning:  heif reader error: %s\n", error_code.message);
  90                 heif_context_free(ctx);
  91                 return FALSE;
  92                 }
  93
  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);
  96         if (error_code.code)
  97                 {
  98                 log_printf("warning: heif reader error: %s\n", error_code.message);
  99                 heif_context_free(ctx);
 100                 return FALSE;
 101                 }
 102
 103         data = heif_image_get_plane(img, heif_channel_interleaved, &stride);
 104
 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);
 109
 110         ld->pixbuf = gdk_pixbuf_new_from_data(data, GDK_COLORSPACE_RGB, alpha, 8, width, height, stride, free_buffer, img);
 111
 112         ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
 113
 114         heif_context_free(ctx);
 115
 116         return TRUE;
 117 }
 118
 119 static gpointer image_loader_heif_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 120 {
 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;
 125         loader->data = data;
 126         loader->page_num = 0;
 127         return loader;
 128 }
 129
 130 static void image_loader_heif_set_size(gpointer loader, int width, int height)
 131 {
 132         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 133         ld->requested_width = width;
 134         ld->requested_height = height;
 135 }
 136
 137 static GdkPixbuf* image_loader_heif_get_pixbuf(gpointer loader)
 138 {
 139         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 140         return ld->pixbuf;
 141 }
 142
 143 static gchar* image_loader_heif_get_format_name(gpointer)
 144 {
 145         return g_strdup("heif");
 146 }
 147
 148 static gchar** image_loader_heif_get_format_mime_types(gpointer)
 149 {
 150         static const gchar *mime[] = {"image/heic", nullptr};
 151         return g_strdupv(const_cast<gchar **>(mime));
 152 }
 153
 154 static void image_loader_heif_set_page_num(gpointer loader, gint page_num)
 155 {
 156         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 157
 158         ld->page_num = page_num;
 159 }
 160
 161 static gint image_loader_heif_get_page_total(gpointer loader)
 162 {
 163         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 164
 165         return ld->page_total;
 166 }
 167
 168 static gboolean image_loader_heif_close(gpointer, GError **)
 169 {
 170         return TRUE;
 171 }
 172
 173 static void image_loader_heif_abort(gpointer loader)
 174 {
 175         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 176         ld->abort = TRUE;
 177 }
 178
 179 static void image_loader_heif_free(gpointer loader)
 180 {
 181         auto ld = static_cast<ImageLoaderHEIF *>(loader);
 182         if (ld->pixbuf) g_object_unref(ld->pixbuf);
 183         g_free(ld);
 184 }
 185
 186 void image_loader_backend_set_heif(ImageLoaderBackend *funcs)
 187 {
 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;
 200 }
 201
 202 #endif
 203 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */