export the "gifVersion" when compiled with gif support

lib/canvas.js

@@ -45,6 +45,14 @@ if (canvas.jpegVersion) {
   exports.jpegVersion = canvas.jpegVersion;
 }
 
+/**
+ * gif_lib version.
+ */
+
+if (canvas.gifVersion) {
+  exports.gifVersion = canvas.gifVersion.replace(/[^.\d]/g, '');
+}
+
 /**
  * Expose constructors.
  */

src/Image.cc

@@ -13,7 +13,6 @@
 #include <node_buffer.h>
 
 #ifdef HAVE_GIF
-#include <gif_lib.h>
 typedef struct {
   uint8_t *buf;
   unsigned len;

src/Image.h

@@ -15,6 +15,10 @@
 #include <jerror.h>
 #endif
 
+#ifdef HAVE_GIF
+#include <gif_lib.h>
+#endif
+
 class Image: public node::ObjectWrap {
   public:
     char *filename;

src/init.cc

@@ -30,6 +30,9 @@ init (Handle<Object> target) {
   snprintf(jpeg_version, 10, "%d%c", JPEG_LIB_VERSION_MAJOR, JPEG_LIB_VERSION_MINOR + 'a' - 1);
   target->Set(String::New("jpegVersion"), String::New(jpeg_version));
 #endif
+#ifdef HAVE_GIF
+  target->Set(String::New("gifVersion"), String::New(GIF_LIB_VERSION));
+#endif
 }
 
 NODE_MODULE(canvas,init);