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 void get_resized_size (int w, int h, int aw, int ah, int *sw, int *sh);
  44
  45 ImageView *imageview_create(void)
  46 {
  47         ImageView *imageview;
  48         GtkWidget *scrolledwin;
  49
  50         debug_print("Creating image view...\n");
  51         imageview = g_new0(ImageView, 1);
  52
  53         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
  54         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
  55                                        GTK_POLICY_AUTOMATIC,
  56                                        GTK_POLICY_AUTOMATIC);
  57         gtk_widget_set_usize(scrolledwin, prefs_common.mainview_width, -1);
  58
  59         gtk_widget_show_all(scrolledwin);
  60
  61         imageview->scrolledwin  = scrolledwin;
  62         imageview->image        = NULL;
  63
  64         return imageview;
  65 }
  66
  67 void imageview_init(ImageView *imageview)
  68 {
  69 }
  70
  71 #if HAVE_GDK_PIXBUF
  72 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
  73                           const gchar *file)
  74 {
  75         GdkPixbuf *pixbuf;
  76         GdkPixbuf *pixbuf_scaled;
  77         GdkPixmap *pixmap;
  78         GdkBitmap *mask;
  79         int avail_height = imageview->scrolledwin->parent->allocation.height - 10;
  80         int avail_width  = imageview->scrolledwin->parent->allocation.width - 10;
  81         int sized_height = -1;
  82         int sized_width  = -1;
  83
  84         imageview_clear(imageview);
  85
  86         pixbuf = gdk_pixbuf_new_from_file(file);
  87
  88         if (!pixbuf) {
  89                 g_warning(_("Can't load the image."));
  90                 return;
  91         }
  92
  93         if (imageview->messageview->mainwin)
  94                 main_window_cursor_wait(imageview->messageview->mainwin);
  95
  96         get_resized_size (gdk_pixbuf_get_width(pixbuf), gdk_pixbuf_get_height(pixbuf),
  97                           avail_width, avail_height, &sized_width, &sized_height);
  98
  99         pixbuf_scaled = gdk_pixbuf_scale_simple (pixbuf, sized_width, sized_height, 0);
 100
 101         gdk_pixbuf_render_pixmap_and_mask(pixbuf_scaled, &pixmap, &mask, 0);
 102
 103         if (!imageview->image) {
 104                 imageview->image = gtk_pixmap_new(pixmap, mask);
 105
 106                 gtk_scrolled_window_add_with_viewport
 107                         (GTK_SCROLLED_WINDOW(imageview->scrolledwin),
 108                          imageview->image);
 109         } else
 110                 gtk_pixmap_set(GTK_PIXMAP(imageview->image), pixmap, mask);
 111
 112         gtk_widget_show(imageview->image);
 113
 114         gdk_pixbuf_unref(pixbuf);
 115
 116         if (imageview->messageview->mainwin)
 117                 main_window_cursor_normal(imageview->messageview->mainwin);
 118 }
 119 #else
 120 #if HAVE_GDK_IMLIB
 121 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
 122                           const gchar *file)
 123 {
 124         GdkImlibImage *im;
 125         int avail_height = imageview->scrolledwin->parent->allocation.height - 10;
 126         int avail_width  = imageview->scrolledwin->parent->allocation.width - 10;
 127         int sized_height = -1;
 128         int sized_width  = -1;
 129
 130         imageview_clear(imageview);
 131
 132         im = gdk_imlib_load_image((gchar *)file);
 133
 134         if (!im) {
 135                 g_warning(_("Can't load the image."));
 136                 return;
 137         }
 138
 139         if (imageview->messageview->mainwin)
 140                 main_window_cursor_wait(imageview->messageview->mainwin);
 141
 142         get_resized_size (im->rgb_width, im->rgb_height,
 143                           avail_width, avail_height, &sized_width, &sized_height);
 144
 145         gdk_imlib_render(im, sized_width, sized_height);
 146
 147         if (!imageview->image) {
 148                 imageview->image = gtk_pixmap_new(gdk_imlib_move_image(im),
 149                                                   gdk_imlib_move_mask(im));
 150
 151                 gtk_scrolled_window_add_with_viewport
 152                         (GTK_SCROLLED_WINDOW(imageview->scrolledwin),
 153                          imageview->image);
 154         } else
 155                 gtk_pixmap_set(GTK_PIXMAP(imageview->image),
 156                                gdk_imlib_move_image(im),
 157                                gdk_imlib_move_mask(im));
 158
 159         gtk_widget_show(imageview->image);
 160
 161         gdk_imlib_destroy_image(im);
 162
 163         if (imageview->messageview->mainwin)
 164                 main_window_cursor_normal(imageview->messageview->mainwin);
 165 }
 166 #else
 167 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
 168                           const gchar *file)
 169 {
 170 }
 171 #endif /* HAVE_GDK_IMLIB */
 172 #endif /* HAVE_GDK_PIXBUF */
 173
 174 void imageview_clear(ImageView *imageview)
 175 {
 176         GtkAdjustment *hadj, *vadj;
 177
 178         if (imageview->image)
 179                 gtk_pixmap_set(GTK_PIXMAP(imageview->image), NULL, NULL);
 180         hadj = gtk_scrolled_window_get_hadjustment
 181                 (GTK_SCROLLED_WINDOW(imageview->scrolledwin));
 182         gtk_adjustment_set_value(hadj, 0.0);
 183         vadj = gtk_scrolled_window_get_vadjustment
 184                 (GTK_SCROLLED_WINDOW(imageview->scrolledwin));
 185         gtk_adjustment_set_value(vadj, 0.0);
 186 }
 187
 188 void imageview_destroy(ImageView *imageview)
 189 {
 190         g_free(imageview);
 191 }
 192
 193 void get_resized_size (int w, int h, int aw, int ah, int *sw, int *sh) {
 194
 195         float wratio = 1.0;
 196         float hratio = 1.0;
 197         float ratio  = 1.0;
 198
 199         if (w > aw)
 200                 wratio = (float)((float)aw/(float)w);
 201         if (h > ah)
 202                 hratio = (float)((float)ah/(float)h);
 203
 204         ratio = (wratio > hratio) ? hratio : wratio;
 205
 206         *sw = (int)(w * ratio);
 207         *sh = (int)(h * ratio);
 208
 209         /* be paranoid */
 210         if (*sw <= 0 || *sh <= 0) {
 211                 *sw = w;
 212                 *sh = h;
 213         }
 214 }