initial import

1 files changed, 112 insertions, 0 deletions

diff --git a/view.c b/view.c
new file mode 100644
index 0000000..af237c9
--- /dev/null
+++ b/view.c
@@ -0,0 +1,112 @@
+#include <stdlib.h>
+#include <math.h>
+#include <unistd.h>
+
+#include <glib.h>
+#include <gio/gio.h>
+#include <gio/gunixinputstream.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gdk-pixbuf/gdk-pixdata.h>
+
+// TODO Unhardcode these
+const int char_width = 8;
+const int char_height = 15;
+
+const int window_width = 8 * 80;
+const int window_height = 15 * 25;
+
+static gboolean view_pixbuf(GdkPixbuf *pixbuf)
+{
+	gint width = gdk_pixbuf_get_width(pixbuf);
+	gint height = gdk_pixbuf_get_height(pixbuf);	
+
+	double scale = 1.0;
+	if (width > window_width) {
+		scale *= (double)window_width / width;
+		width = width * scale;
+		height = height * scale;
+	}
+	if (height > window_height || FALSE) {
+		scale *= (double)window_height / height;
+		width = width * scale;
+		height = height * scale;
+	}
+
+	GdkPixbuf *scaled;
+
+	if (scale != 1.0) {
+		scaled = gdk_pixbuf_scale_simple(pixbuf, width, height, GDK_INTERP_BILINEAR);
+	} else {
+		scaled = GDK_PIXBUF(g_object_ref(pixbuf));
+	}
+
+	GdkPixdata pixdata;
+	gpointer pixdata_p = gdk_pixdata_from_pixbuf(&pixdata, scaled, TRUE);
+
+	if (pixdata_p == NULL) {
+		g_object_unref(scaled);
+		return FALSE;
+	}
+
+	guint size;
+	guint8 *data = gdk_pixdata_serialize(&pixdata, &size);
+	gchar *str = g_base64_encode(data, size);
+
+	g_print("\033]v;%s\007", str);
+
+	int rows = ceil(height / (double)char_height);
+	while (rows > 0) {
+		g_print("\n");
+		rows--;
+	}
+	
+	g_free(str);
+	g_free(data);
+	g_free(pixdata.pixel_data);
+	g_object_unref(scaled);
+
+	return TRUE;
+}
+
+
+int main(int argc, char * argv[])
+{
+	g_type_init();
+
+	GError *error = NULL;
+
+	if (!isatty(STDOUT_FILENO)) {
+		g_printerr("Refusing to display image on not-terminal\n");
+		return EXIT_FAILURE;
+	}
+
+	if (argc > 1) {
+		int i;
+		for (i = 1; i < argc; i++) {
+			GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(argv[i], &error);
+			if (pixbuf == NULL) {
+				g_printerr("Failed to open image '%s': %s\n", argv[i], error->message);
+				return EXIT_FAILURE;
+			}
+			if (!view_pixbuf(pixbuf)) {
+				g_printerr("Failed to view image '%s'\n", argv[i]);
+				return EXIT_FAILURE;
+			}
+			g_object_unref(pixbuf);
+		}
+	} else {
+		GInputStream *input = g_unix_input_stream_new(STDIN_FILENO, FALSE);
+		GdkPixbuf *pixbuf = gdk_pixbuf_new_from_stream(input, NULL, &error);
+		if (pixbuf == NULL) {
+			g_printerr("Failed to open stdin image: %s\n", error->message);
+			return EXIT_FAILURE;
+		}
+		if (!view_pixbuf(pixbuf)) {
+			g_printerr("Failed to view stdin image\n");
+			return EXIT_FAILURE;
+		}
+		g_object_unref(pixbuf);
+	}
+
+	return EXIT_SUCCESS;
+}