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 "prefs_common.h"
  38 #include "procmime.h"
  39 #include "imageview.h"
  40 #include "utils.h"
  41
  42 ImageView *imageview_create(void)
  43 {
  44         ImageView *imageview;
  45         GtkWidget *scrolledwin;
  46
  47         debug_print("Creating image view...\n");
  48         imageview = g_new0(ImageView, 1);
  49
  50         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
  51         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
  52                                        GTK_POLICY_AUTOMATIC,
  53                                        GTK_POLICY_AUTOMATIC);
  54         gtk_widget_set_usize(scrolledwin, prefs_common.mainview_width, -1);
  55
  56         gtk_widget_show_all(scrolledwin);
  57
  58         imageview->scrolledwin  = scrolledwin;
  59         imageview->image        = NULL;
  60
  61         return imageview;
  62 }
  63
  64 void imageview_init(ImageView *imageview)
  65 {
  66 }
  67
  68 #if HAVE_GDK_PIXBUF
  69 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
  70                           const gchar *file, gboolean resize)
  71 {
  72         GdkPixbuf *pixbuf;
  73         GdkPixbuf *pixbuf_scaled;
  74         GdkPixmap *pixmap;
  75         GdkBitmap *mask;
  76         gint avail_width;
  77         gint avail_height;
  78         gint new_width;
  79         gint new_height;
  80
  81         g_return_if_fail(imageview != NULL);
  82
  83         imageview_clear(imageview);
  84
  85         pixbuf = gdk_pixbuf_new_from_file(file);
  86
  87         if (!pixbuf) {
  88                 g_warning("Can't load the image.");
  89                 return;
  90         }
  91
  92         if (imageview->messageview->mainwin)
  93                 main_window_cursor_wait(imageview->messageview->mainwin);
  94
  95         if (resize) {
  96                 avail_width = imageview->scrolledwin->parent->allocation.width;
  97                 avail_height = imageview->scrolledwin->parent->allocation.height;
  98                 if (avail_width > 8) avail_width -= 8;
  99                 if (avail_height > 8) avail_height -= 8;
 100
 101                 imageview_get_resized_size(gdk_pixbuf_get_width(pixbuf),
 102                                  gdk_pixbuf_get_height(pixbuf),
 103                                  avail_width, avail_height,
 104                                  &new_width, &new_height);
 105
 106                 pixbuf_scaled = gdk_pixbuf_scale_simple
 107                         (pixbuf, new_width, new_height, GDK_INTERP_BILINEAR);
 108                 gdk_pixbuf_unref(pixbuf);
 109                 pixbuf = pixbuf_scaled;
 110         }
 111
 112         gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &mask, 0);
 113
 114         if (!imageview->image) {
 115                 imageview->image = gtk_pixmap_new(pixmap, mask);
 116
 117                 gtk_scrolled_window_add_with_viewport
 118                         (GTK_SCROLLED_WINDOW(imageview->scrolledwin),
 119                          imageview->image);
 120         } else
 121                 gtk_pixmap_set(GTK_PIXMAP(imageview->image), pixmap, mask);
 122
 123         gtk_widget_show(imageview->image);
 124
 125         gdk_pixbuf_unref(pixbuf);
 126
 127         if (imageview->messageview->mainwin)
 128                 main_window_cursor_normal(imageview->messageview->mainwin);
 129 }
 130 #else
 131 #if HAVE_GDK_IMLIB
 132 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
 133                           const gchar *file, gboolean resize)
 134 {
 135         GdkImlibImage *im;
 136         gint avail_width;
 137         gint avail_height;
 138         gint new_width;
 139         gint new_height;
 140
 141         g_return_if_fail(imageview != NULL);
 142
 143         imageview_clear(imageview);
 144
 145         im = gdk_imlib_load_image((gchar *)file);
 146
 147         if (!im) {
 148                 g_warning("Can't load the image.");
 149                 return;
 150         }
 151
 152         if (imageview->messageview->mainwin)
 153                 main_window_cursor_wait(imageview->messageview->mainwin);
 154
 155         if (resize) {
 156                 avail_width = imageview->scrolledwin->parent->allocation.width;
 157                 avail_height = imageview->scrolledwin->parent->allocation.height;
 158                 if (avail_width > 8) avail_width -= 8;
 159                 if (avail_height > 8) avail_height -= 8;
 160
 161                 imageview_get_resized_size(im->rgb_width, im->rgb_height,
 162                                  avail_width, avail_height,
 163                                  &new_width, &new_height);
 164         } else {
 165                 new_width = im->rgb_width;
 166                 new_height = im->rgb_height;
 167         }
 168
 169         gdk_imlib_render(im, new_width, new_height);
 170
 171         if (!imageview->image) {
 172                 imageview->image = gtk_pixmap_new(gdk_imlib_move_image(im),
 173                                                   gdk_imlib_move_mask(im));
 174
 175                 gtk_scrolled_window_add_with_viewport
 176                         (GTK_SCROLLED_WINDOW(imageview->scrolledwin),
 177                          imageview->image);
 178         } else
 179                 gtk_pixmap_set(GTK_PIXMAP(imageview->image),
 180                                gdk_imlib_move_image(im),
 181                                gdk_imlib_move_mask(im));
 182
 183         gtk_widget_show(imageview->image);
 184
 185         gdk_imlib_destroy_image(im);
 186
 187         if (imageview->messageview->mainwin)
 188                 main_window_cursor_normal(imageview->messageview->mainwin);
 189 }
 190 #else
 191 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
 192                           const gchar *file, gboolean resize)
 193 {
 194 }
 195 #endif /* HAVE_GDK_IMLIB */
 196 #endif /* HAVE_GDK_PIXBUF */
 197
 198 void imageview_clear(ImageView *imageview)
 199 {
 200         GtkAdjustment *hadj, *vadj;
 201
 202         if (imageview->image)
 203                 gtk_pixmap_set(GTK_PIXMAP(imageview->image), NULL, NULL);
 204         hadj = gtk_scrolled_window_get_hadjustment
 205                 (GTK_SCROLLED_WINDOW(imageview->scrolledwin));
 206         gtk_adjustment_set_value(hadj, 0.0);
 207         vadj = gtk_scrolled_window_get_vadjustment
 208                 (GTK_SCROLLED_WINDOW(imageview->scrolledwin));
 209         gtk_adjustment_set_value(vadj, 0.0);
 210 }
 211
 212 void imageview_destroy(ImageView *imageview)
 213 {
 214         g_free(imageview);
 215 }
 216
 217 void imageview_get_resized_size(gint w, gint h, gint aw, gint ah,
 218                              gint *sw, gint *sh)
 219 {
 220         gfloat wratio = 1.0;
 221         gfloat hratio = 1.0;
 222         gfloat ratio  = 1.0;
 223
 224         if (w > aw)
 225                 wratio = (gfloat)aw / (gfloat)w;
 226         if (h > ah)
 227                 hratio = (gfloat)ah / (gfloat)h;
 228
 229         ratio = (wratio > hratio) ? hratio : wratio;
 230
 231         *sw = (gint)(w * ratio);
 232         *sh = (gint)(h * ratio);
 233
 234         /* be paranoid */
 235         if (*sw <= 0 || *sh <= 0) {
 236                 *sw = w;
 237                 *sh = h;
 238         }
 239 }