1 files changed, 97 insertions, 0 deletions
diff --git a/src/image.c b/src/image.c
new file mode 100644
index 0000000..d4765fd
--- /dev/null
+++ b/src/image.c
@@ -0,0 +1,97 @@
+#include "image.h"
+#include "window.h"
+#include <gtk-3.0/gtk/gtk.h>
+
+GtkWidget *new_image()
+{
+    image = gtk_image_new();
+    return image;
+}
+
+int load_image(char *file_name)
+{
+    GError *error = NULL;
+    if (pixbuf != NULL)
+        g_object_unref(pixbuf);
+    pixbuf = gdk_pixbuf_new_from_file(file_name, &error);
+    if (error)
+        return -1;
+    curr_pixbuf_width = pixbuf_width = gdk_pixbuf_get_width(GDK_PIXBUF(pixbuf));
+    curr_pixbuf_height = pixbuf_height =
+        gdk_pixbuf_get_height(GDK_PIXBUF(pixbuf));
+    aspect_ratio = (double)pixbuf_width / (double)pixbuf_height;
+    curr_zoom = 1.0;
+    fit_image();
+    set_window_title(g_path_get_basename(file_name));
+    return 1;
+}
+
+void update_pixbuf()
+{
+    if (curr_pixbuf != NULL)
+        g_object_unref(curr_pixbuf);
+    if (pixbuf == NULL)
+        return;
+    curr_pixbuf =
+        gdk_pixbuf_scale_simple(GDK_PIXBUF(pixbuf), curr_pixbuf_width,
+                                curr_pixbuf_height, GDK_INTERP_BILINEAR);
+    gtk_image_set_from_pixbuf(GTK_IMAGE(image), GDK_PIXBUF(curr_pixbuf));
+}
+
+void fit_image()
+{
+    gint win_width, win_height;
+    get_curr_win_size(&win_width, &win_height);
+    curr_scale_mod = fit;
+    if (pixbuf == NULL || win_width < 1 || win_height < 1)
+        return;
+    if (win_width < pixbuf_width && win_height > pixbuf_height) {
+        curr_pixbuf_width = win_width;
+        curr_pixbuf_height = (double)curr_pixbuf_width / aspect_ratio;
+    } else if (win_width > pixbuf_width && win_height < pixbuf_height) {
+        curr_pixbuf_height = win_height;
+        curr_pixbuf_width = (double)curr_pixbuf_height * aspect_ratio;
+    } else if (win_width < pixbuf_width && win_height < pixbuf_height) {
+        if (((double)win_width / (double)win_height) > aspect_ratio) {
+            curr_pixbuf_height = win_height;
+            curr_pixbuf_width = ((double)curr_pixbuf_height * aspect_ratio);
+        } else {
+            curr_pixbuf_width = win_width;
+            curr_pixbuf_height = (double)curr_pixbuf_width / aspect_ratio;
+        }
+    } else {
+        curr_pixbuf_width = pixbuf_width;
+        curr_pixbuf_height = pixbuf_height;
+    }
+
+    curr_zoom = (double)curr_pixbuf_width / (double)pixbuf_width;
+    if (curr_pixbuf_width < 1 || curr_pixbuf_height < 1)
+        return;
+
+    update_pixbuf();
+}
+
+void zoom(int type)
+{
+    curr_scale_mod = zoomed;
+    if (pixbuf == NULL)
+        return;
+    if (type == 0) {
+        if (curr_zoom == 1.0)
+            return;
+        curr_zoom = 1.0;
+    } else if (type < 0) {
+        if (curr_zoom < 0.2)
+            return;
+        curr_zoom -= 0.1;
+    } else if (type > 0) {
+        if (curr_zoom > 2)
+            return;
+        curr_zoom += 0.1;
+    }
+
+    curr_pixbuf_width = curr_zoom * (double)pixbuf_width;
+    curr_pixbuf_height = curr_zoom * (double)pixbuf_height;
+
+    update_pixbuf();
+}