src/imageview.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2002 Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include <glib.h>
  25 #include <gtk/gtkscrolledwindow.h>
  26 #include <gtk/gtkpixmap.h>
  27
  28 #if HAVE_GDK_PIXBUF
  29 #  include <gdk-pixbuf/gdk-pixbuf.h>
  30 #else
  31 #if HAVE_GDK_IMLIB
  32 #  include <gdk_imlib.h>
  33 #endif
  34 #endif /* HAVE_GDK_PIXBUF */
  35
  36 #include "intl.h"
  37 #include "mainwindow.h"
  38 #include "prefs_common.h"
  39 #include "procmime.h"
  40 #include "imageview.h"
  41 #include "utils.h"
  42
  43 static void get_resized_size(gint w, gint h, gint aw, gint ah,
  44                              gint *sw, gint *sh);
  45
  46
  47 ImageView *imageview_create(void)
  48 {
  49         ImageView *imageview;
  50         GtkWidget *scrolledwin;
  51
  52         debug_print("Creating image view...\n");
  53         imageview = g_new0(ImageView, 1);
  54
  55         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
  56         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
  57                                        GTK_POLICY_AUTOMATIC,
  58                                        GTK_POLICY_AUTOMATIC);
  59         gtk_widget_set_usize(scrolledwin, prefs_common.mainview_width, -1);
  60
  61         gtk_widget_show_all(scrolledwin);
  62
  63         imageview->scrolledwin  = scrolledwin;
  64         imageview->image        = NULL;
  65
  66         return imageview;
  67 }
  68
  69 void imageview_init(ImageView *imageview)
  70 {
  71 }
  72
  73 #if HAVE_GDK_PIXBUF
  74 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
  75                           const gchar *file, gboolean resize)
  76 {
  77         GdkPixbuf *pixbuf;
  78         GdkPixbuf *pixbuf_scaled;
  79         GdkPixmap *pixmap;
  80         GdkBitmap *mask;
  81         gint avail_width;
  82         gint avail_height;
  83         gint new_width;
  84         gint new_height;
  85
  86         g_return_if_fail(imageview != NULL);
  87
  88         imageview_clear(imageview);
  89
  90         pixbuf = gdk_pixbuf_new_from_file(file);
  91
  92         if (!pixbuf) {
  93                 g_warning(_("Can't load the image."));
  94                 return;
  95         }
  96
  97         if (imageview->messageview->mainwin)
  98                 main_window_cursor_wait(imageview->messageview->mainwin);
  99
 100         if (resize) {
 101                 avail_width = imageview->scrolledwin->parent->allocation.width;
 102                 avail_height = imageview->scrolledwin->parent->allocation.height;
 103                 if (avail_width > 8) avail_width -= 8;
 104                 if (avail_height > 8) avail_height -= 8;
 105
 106                 get_resized_size(gdk_pixbuf_get_width(pixbuf),
 107                                  gdk_pixbuf_get_height(pixbuf),
 108                                  avail_width, avail_height,
 109                                  &new_width, &new_height);
 110
 111                 pixbuf_scaled = gdk_pixbuf_scale_simple
 112                         (pixbuf, new_width, new_height, GDK_INTERP_BILINEAR);
 113                 gdk_pixbuf_unref(pixbuf);
 114                 pixbuf = pixbuf_scaled;
 115         }
 116
 117         gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &mask, 0);
 118
 119         if (!imageview->image) {
 120                 imageview->image = gtk_pixmap_new(pixmap, mask);
 121
 122                 gtk_scrolled_window_add_with_viewport
 123                         (GTK_SCROLLED_WINDOW(imageview->scrolledwin),
 124                          imageview->image);
 125         } else
 126                 gtk_pixmap_set(GTK_PIXMAP(imageview->image), pixmap, mask);
 127
 128         gtk_widget_show(imageview->image);
 129
 130         gdk_pixbuf_unref(pixbuf);
 131
 132         if (imageview->messageview->mainwin)
 133                 main_window_cursor_normal(imageview->messageview->mainwin);
 134 }
 135 #else
 136 #if HAVE_GDK_IMLIB
 137 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
 138                           const gchar *file, gboolean resize)
 139 {
 140         GdkImlibImage *im;
 141         gint avail_width;
 142         gint avail_height;
 143         gint new_width;
 144         gint new_height;
 145
 146         g_return_if_fail(imageview != NULL);
 147
 148         imageview_clear(imageview);
 149
 150         im = gdk_imlib_load_image((gchar *)file);
 151
 152         if (!im) {
 153                 g_warning(_("Can't load the image."));
 154                 return;
 155         }
 156
 157         if (imageview->messageview->mainwin)
 158                 main_window_cursor_wait(imageview->messageview->mainwin);
 159
 160         if (resize) {
 161                 avail_width = imageview->scrolledwin->parent->allocation.width;
 162                 avail_height = imageview->scrolledwin->parent->allocation.height;
 163                 if (avail_width > 8) avail_width -= 8;
 164                 if (avail_height > 8) avail_height -= 8;
 165
 166                 get_resized_size(im->rgb_width, im->rgb_height,
 167                                  avail_width, avail_height,
 168                                  &new_width, &new_height);
 169         } else {
 170                 new_width = im->rgb_width;
 171                 new_height = im->rgb_height;
 172         }
 173
 174         gdk_imlib_render(im, new_width, new_height);
 175
 176         if (!imageview->image) {
 177                 imageview->image = gtk_pixmap_new(gdk_imlib_move_image(im),
 178                                                   gdk_imlib_move_mask(im));
 179
 180                 gtk_scrolled_window_add_with_viewport
 181                         (GTK_SCROLLED_WINDOW(imageview->scrolledwin),
 182                          imageview->image);
 183         } else
 184                 gtk_pixmap_set(GTK_PIXMAP(imageview->image),
 185                                gdk_imlib_move_image(im),
 186                                gdk_imlib_move_mask(im));
 187
 188         gtk_widget_show(imageview->image);
 189
 190         gdk_imlib_destroy_image(im);
 191
 192         if (imageview->messageview->mainwin)
 193                 main_window_cursor_normal(imageview->messageview->mainwin);
 194 }
 195 #else
 196 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
 197                           const gchar *file, gboolean resize)
 198 {
 199 }
 200 #endif /* HAVE_GDK_IMLIB */
 201 #endif /* HAVE_GDK_PIXBUF */
 202
 203 void imageview_clear(ImageView *imageview)
 204 {
 205         GtkAdjustment *hadj, *vadj;
 206
 207         if (imageview->image)
 208                 gtk_pixmap_set(GTK_PIXMAP(imageview->image), NULL, NULL);
 209         hadj = gtk_scrolled_window_get_hadjustment
 210                 (GTK_SCROLLED_WINDOW(imageview->scrolledwin));
 211         gtk_adjustment_set_value(hadj, 0.0);
 212         vadj = gtk_scrolled_window_get_vadjustment
 213                 (GTK_SCROLLED_WINDOW(imageview->scrolledwin));
 214         gtk_adjustment_set_value(vadj, 0.0);
 215 }
 216
 217 void imageview_destroy(ImageView *imageview)
 218 {
 219         g_free(imageview);
 220 }
 221
 222 static void get_resized_size(gint w, gint h, gint aw, gint ah,
 223                              gint *sw, gint *sh)
 224 {
 225         gfloat wratio = 1.0;
 226         gfloat hratio = 1.0;
 227         gfloat ratio  = 1.0;
 228
 229         if (w > aw)
 230                 wratio = (gfloat)aw / (gfloat)w;
 231         if (h > ah)
 232                 hratio = (gfloat)ah / (gfloat)h;
 233
 234         ratio = (wratio > hratio) ? hratio : wratio;
 235
 236         *sw = (gint)(w * ratio);
 237         *sh = (gint)(h * ratio);
 238
 239         /* be paranoid */
 240         if (*sw <= 0 || *sh <= 0) {
 241                 *sw = w;
 242                 *sh = h;
 243         }
 244 }