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#include <gtk-3.0/gtk/gtk.h>
#include <stdlib.h>
#include "image.h"
#include "window.h"
static GtkWidget *image;
static GdkPixbuf *pixbuf;
static GdkPixbuf *curr_pixbuf;
static int pixbuf_width, pixbuf_height, curr_pixbuf_width, curr_pixbuf_height;
static double aspect_ratio;
static double curr_zoom;
static enum scale_mode curr_scale_mod;
static int loading = 0;
static GFile *file;
static GFileInputStream *is;
GtkWidget *new_image()
{
image = gtk_image_new();
return image;
}
void pixbuf_load_callback(
GObject *source_object, GAsyncResult *res, gpointer user_data)
{
if (pixbuf != NULL)
g_object_unref(pixbuf);
if (is != NULL)
g_object_unref(is);
GError *error = NULL;
pixbuf = gdk_pixbuf_new_from_stream_finish(res, &error);
if (error != NULL) {
loading = 0;
g_printerr("%s\n", error->message);
exit(EXIT_FAILURE);
}
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;
fit_image();
set_window_title(g_file_get_basename(file), pixbuf_width, pixbuf_height);
if (file != NULL)
g_object_unref(file);
loading = 0;
}
void file_read_callback(
GObject *source_object, GAsyncResult *res, gpointer user_data)
{
GError *error = NULL;
is = g_file_read_finish(file, res, &error);
if (error != NULL) {
loading = 0;
g_printerr("%s\n", error->message);
exit(EXIT_FAILURE);
}
gdk_pixbuf_new_from_stream_async(
G_INPUT_STREAM(is), NULL, &pixbuf_load_callback, NULL);
}
int load_image(char *file_name)
{
if (loading)
return -1;
loading = 1;
file = g_file_new_for_path(file_name);
g_file_read_async(
file, G_PRIORITY_DEFAULT, NULL, &file_read_callback, NULL);
curr_zoom = 1.0;
return 0;
}
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();
}
enum scale_mode get_current_scale_mode()
{
return curr_scale_mod;
}
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