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 };
  40
  41 static void free_buffer(guchar *pixels, gpointer data)
  42 {
  43         g_free (pixels);
  44 }
  45
  46 static gboolean image_loader_heif_load(gpointer loader, const guchar *buf, gsize count, GError **error)
  47 {
  48         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
  49         struct heif_context* ctx;
  50         struct heif_image* img;
  51         struct heif_error error_code;
  52         struct heif_image_handle* handle;
  53         guint8* data;
  54         gint width, height;
  55         gint stride;
  56         gboolean alpha;
  57
  58         ctx = heif_context_alloc();
  59
  60         error_code = heif_context_read_from_memory_without_copy(ctx, buf, count, NULL);
  61         if (error_code.code)
  62                 {
  63                 log_printf("warning: heif reader error: %s\n", error_code.message);
  64                 heif_context_free(ctx);
  65                 return FALSE;
  66                 }
  67
  68         // get a handle to the primary image
  69         error_code = heif_context_get_primary_image_handle(ctx, &handle);
  70         if (error_code.code)
  71                 {
  72                 log_printf("warning: heif reader error: %s\n", error_code.message);
  73                 heif_context_free(ctx);
  74                 return FALSE;
  75                 }
  76
  77         // decode the image and convert colorspace to RGB, saved as 24bit interleaved
  78         error_code = heif_decode_image(handle, &img, heif_colorspace_RGB, heif_chroma_interleaved_24bit, NULL);
  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         data = heif_image_get_plane(img, heif_channel_interleaved, &stride);
  87
  88         height = heif_image_get_height(img,heif_channel_interleaved);
  89         width = heif_image_get_width(img,heif_channel_interleaved);
  90         alpha = heif_image_handle_has_alpha_channel(handle);
  91
  92         ld->pixbuf = gdk_pixbuf_new_from_data(data, GDK_COLORSPACE_RGB, alpha, 8, width, height, stride, free_buffer, NULL);
  93
  94         ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
  95
  96         heif_context_free(ctx);
  97
  98         return TRUE;
  99 }
 100
 101 static gpointer image_loader_heif_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 102 {
 103         ImageLoaderHEIF *loader = g_new0(ImageLoaderHEIF, 1);
 104         loader->area_updated_cb = area_updated_cb;
 105         loader->size_cb = size_cb;
 106         loader->area_prepared_cb = area_prepared_cb;
 107         loader->data = data;
 108         return (gpointer) loader;
 109 }
 110
 111 static void image_loader_heif_set_size(gpointer loader, int width, int height)
 112 {
 113         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
 114         ld->requested_width = width;
 115         ld->requested_height = height;
 116 }
 117
 118 static GdkPixbuf* image_loader_heif_get_pixbuf(gpointer loader)
 119 {
 120         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
 121         return ld->pixbuf;
 122 }
 123
 124 static gchar* image_loader_heif_get_format_name(gpointer loader)
 125 {
 126         return g_strdup("heif");
 127 }
 128
 129 static gchar** image_loader_heif_get_format_mime_types(gpointer loader)
 130 {
 131         static gchar *mime[] = {"image/heic", NULL};
 132         return g_strdupv(mime);
 133 }
 134
 135 static gboolean image_loader_heif_close(gpointer loader, GError **error)
 136 {
 137         return TRUE;
 138 }
 139
 140 static void image_loader_heif_abort(gpointer loader)
 141 {
 142         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
 143         ld->abort = TRUE;
 144 }
 145
 146 static void image_loader_heif_free(gpointer loader)
 147 {
 148         ImageLoaderHEIF *ld = (ImageLoaderHEIF *) loader;
 149         if (ld->pixbuf) g_object_unref(ld->pixbuf);
 150         g_free(ld);
 151 }
 152
 153 void image_loader_backend_set_heif(ImageLoaderBackend *funcs)
 154 {
 155         funcs->loader_new = image_loader_heif_new;
 156         funcs->set_size = image_loader_heif_set_size;
 157         funcs->load = image_loader_heif_load;
 158         funcs->write = NULL;
 159         funcs->get_pixbuf = image_loader_heif_get_pixbuf;
 160         funcs->close = image_loader_heif_close;
 161         funcs->abort = image_loader_heif_abort;
 162         funcs->free = image_loader_heif_free;
 163         funcs->get_format_name = image_loader_heif_get_format_name;
 164         funcs->get_format_mime_types = image_loader_heif_get_format_mime_types;
 165 }
 166
 167 #endif
 168 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */