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