Scale the GUI to fit the screen

With this patch set, if needed, we scale the images during early
boot. TTF support is needed to properly scale the font. No font
scaling is done on the old style fixed width font used in the
console.

Special thanks to _that for figuring out the scaling and blending
function calls to make this possible.

Change-Id: If2f79bef16d6db2e1298bfc3d00c9bcca2bee37a
diff --git a/gui/slidervalue.cpp b/gui/slidervalue.cpp
index 3ae6b98..7c38e32 100644
--- a/gui/slidervalue.cpp
+++ b/gui/slidervalue.cpp
@@ -173,14 +173,14 @@
 		if (attr)
 		{
 			string parsevalue = gui_parse_text(attr->value());
-			mLineH = atoi(parsevalue.c_str());
+			mLineH = scale_theme_y(atoi(parsevalue.c_str()));
 		}
 
 		attr = child->first_attribute("linepadding");
 		if (attr)
 		{
 			string parsevalue = gui_parse_text(attr->value());
-			mPadding = atoi(parsevalue.c_str());
+			mPadding = scale_theme_x(atoi(parsevalue.c_str()));
 			mLinePadding = mPadding;
 		}
 
@@ -188,14 +188,14 @@
 		if (attr)
 		{
 			string parsevalue = gui_parse_text(attr->value());
-			mSliderW = atoi(parsevalue.c_str());
+			mSliderW = scale_theme_x(atoi(parsevalue.c_str()));
 		}
 
 		attr = child->first_attribute("sliderh");
 		if (attr)
 		{
 			string parsevalue = gui_parse_text(attr->value());
-			mSliderH = atoi(parsevalue.c_str());
+			mSliderH = scale_theme_y(atoi(parsevalue.c_str()));
 		}
 	}