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 static void get_resized_size(gint w, gint h, gint aw, gint ah,
  43                              gint *sw, gint *sh);
  44
  45
  46 ImageView *imageview_create(void)
  47 {
  48         ImageView *imageview;
  49         GtkWidget *scrolledwin;
  50
  51         debug_print("Creating image view...\n");
  52         imageview = g_new0(ImageView, 1);
  53
  54         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
  55         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
  56                                        GTK_POLICY_AUTOMATIC,
  57                                        GTK_POLICY_AUTOMATIC);
  58         gtk_widget_set_usize(scrolledwin, prefs_common.mainview_width, -1);
  59
  60         gtk_widget_show_all(scrolledwin);
  61
  62         imageview->scrolledwin  = scrolledwin;
  63         imageview->image        = NULL;
  64
  65         return imageview;
  66 }
  67
  68 void imageview_init(ImageView *imageview)
  69 {
  70 }
  71
  72 #if HAVE_GDK_PIXBUF
  73 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
  74                           const gchar *file, gboolean resize)
  75 {
  76         GdkPixbuf *pixbuf;
  77         GdkPixbuf *pixbuf_scaled;
  78         GdkPixmap *pixmap;
  79         GdkBitmap *mask;
  80         gint avail_width;
  81         gint avail_height;
  82         gint new_width;
  83         gint new_height;
  84
  85         g_return_if_fail(imageview != NULL);
  86
  87         imageview_clear(imageview);
  88
  89         pixbuf = gdk_pixbuf_new_from_file(file);
  90
  91         if (!pixbuf) {
  92                 g_warning("Can't load the image.");
  93                 return;
  94         }
  95
  96         if (imageview->messageview->mainwin)
  97                 main_window_cursor_wait(imageview->messageview->mainwin);
  98
  99         if (resize) {
 100                 avail_width = imageview->scrolledwin->parent->allocation.width;
 101                 avail_height = imageview->scrolledwin->parent->allocation.height;
 102                 if (avail_width > 8) avail_width -= 8;
 103                 if (avail_height > 8) avail_height -= 8;
 104
 105                 get_resized_size(gdk_pixbuf_get_width(pixbuf),
 106                                  gdk_pixbuf_get_height(pixbuf),
 107                                  avail_width, avail_height,
 108                                  &new_width, &new_height);
 109
 110                 pixbuf_scaled = gdk_pixbuf_scale_simple
 111                         (pixbuf, new_width, new_height, GDK_INTERP_BILINEAR);
 112                 gdk_pixbuf_unref(pixbuf);
 113                 pixbuf = pixbuf_scaled;
 114         }
 115
 116         gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &mask, 0);
 117
 118         if (!imageview->image) {
 119                 imageview->image = gtk_pixmap_new(pixmap, mask);
 120
 121                 gtk_scrolled_window_add_with_viewport
 122                         (GTK_SCROLLED_WINDOW(imageview->scrolledwin),
 123                          imageview->image);
 124         } else
 125                 gtk_pixmap_set(GTK_PIXMAP(imageview->image), pixmap, mask);
 126
 127         gtk_widget_show(imageview->image);
 128
 129         gdk_pixbuf_unref(pixbuf);
 130
 131         if (imageview->messageview->mainwin)
 132                 main_window_cursor_normal(imageview->messageview->mainwin);
 133 }
 134 #else
 135 #if HAVE_GDK_IMLIB
 136 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
 137                           const gchar *file, gboolean resize)
 138 {
 139         GdkImlibImage *im;
 140         gint avail_width;
 141         gint avail_height;
 142         gint new_width;
 143         gint new_height;
 144
 145         g_return_if_fail(imageview != NULL);
 146
 147         imageview_clear(imageview);
 148
 149         im = gdk_imlib_load_image((gchar *)file);
 150
 151         if (!im) {
 152                 g_warning("Can't load the image.");
 153                 return;
 154         }
 155
 156         if (imageview->messageview->mainwin)
 157                 main_window_cursor_wait(imageview->messageview->mainwin);
 158
 159         if (resize) {
 160                 avail_width = imageview->scrolledwin->parent->allocation.width;
 161                 avail_height = imageview->scrolledwin->parent->allocation.height;
 162                 if (avail_width > 8) avail_width -= 8;
 163                 if (avail_height > 8) avail_height -= 8;
 164
 165                 get_resized_size(im->rgb_width, im->rgb_height,
 166                                  avail_width, avail_height,
 167                                  &new_width, &new_height);
 168         } else {
 169                 new_width = im->rgb_width;
 170                 new_height = im->rgb_height;
 171         }
 172
 173         gdk_imlib_render(im, new_width, new_height);
 174
 175         if (!imageview->image) {
 176                 imageview->image = gtk_pixmap_new(gdk_imlib_move_image(im),
 177                                                   gdk_imlib_move_mask(im));
 178
 179                 gtk_scrolled_window_add_with_viewport
 180                         (GTK_SCROLLED_WINDOW(imageview->scrolledwin),
 181                          imageview->image);
 182         } else
 183                 gtk_pixmap_set(GTK_PIXMAP(imageview->image),
 184                                gdk_imlib_move_image(im),
 185                                gdk_imlib_move_mask(im));
 186
 187         gtk_widget_show(imageview->image);
 188
 189         gdk_imlib_destroy_image(im);
 190
 191         if (imageview->messageview->mainwin)
 192                 main_window_cursor_normal(imageview->messageview->mainwin);
 193 }
 194 #else
 195 void imageview_show_image(ImageView *imageview, MimeInfo *mimeinfo,
 196                           const gchar *file, gboolean resize)
 197 {
 198 }
 199 #endif /* HAVE_GDK_IMLIB */
 200 #endif /* HAVE_GDK_PIXBUF */
 201
 202 void imageview_clear(ImageView *imageview)
 203 {
 204         GtkAdjustment *hadj, *vadj;
 205
 206         if (imageview->image)
 207                 gtk_pixmap_set(GTK_PIXMAP(imageview->image), NULL, NULL);
 208         hadj = gtk_scrolled_window_get_hadjustment
 209                 (GTK_SCROLLED_WINDOW(imageview->scrolledwin));
 210         gtk_adjustment_set_value(hadj, 0.0);
 211         vadj = gtk_scrolled_window_get_vadjustment
 212                 (GTK_SCROLLED_WINDOW(imageview->scrolledwin));
 213         gtk_adjustment_set_value(vadj, 0.0);
 214 }
 215
 216 void imageview_destroy(ImageView *imageview)
 217 {
 218         g_free(imageview);
 219 }
 220
 221 static void get_resized_size(gint w, gint h, gint aw, gint ah,
 222                              gint *sw, gint *sh)
 223 {
 224         gfloat wratio = 1.0;
 225         gfloat hratio = 1.0;
 226         gfloat ratio  = 1.0;
 227
 228         if (w > aw)
 229                 wratio = (gfloat)aw / (gfloat)w;
 230         if (h > ah)
 231                 hratio = (gfloat)ah / (gfloat)h;
 232
 233         ratio = (wratio > hratio) ? hratio : wratio;
 234
 235         *sw = (gint)(w * ratio);
 236         *sh = (gint)(h * ratio);
 237
 238         /* be paranoid */
 239         if (*sw <= 0 || *sh <= 0) {
 240                 *sw = w;
 241                 *sh = h;
 242         }
 243 }