MagnumFont: no need to use DistanceFieldGlyphCache.

We are providing already done font with parameters that GlyphCache can
handle. Moreover in ES DistanceFieldGlyphCache might expect RGB input
images because Luminance is not renderable in most cases, thus it
wouldn't work with Luminance TGA input.

src/Plugins/MagnumFont/MagnumFont.cpp

@@ -28,7 +28,7 @@
 #include <Containers/Array.h>
 #include <Utility/Directory.h>
 #include <Utility/Unicode.h>
-#include <Text/DistanceFieldGlyphCache.h>
+#include <Text/GlyphCache.h>
 #include <Trade/ImageData.h>
 
 #include "TgaImporter/TgaImporter.h"
@@ -162,11 +162,11 @@ Vector2 MagnumFont::doGlyphAdvance(const UnsignedInt glyph) {
 
 GlyphCache* MagnumFont::doCreateGlyphCache() {
     /* Set cache image */
-    auto cache = new Text::DistanceFieldGlyphCache(
+    auto cache = new Text::GlyphCache(
         _opened->conf.value<Vector2i>("originalImageSize"),
         _opened->image.size(),
-        _opened->conf.value<Vector2i>("padding").min());
-    cache->setDistanceFieldImage({}, _opened->image);
+        _opened->conf.value<Vector2i>("padding"));
+    cache->setImage({}, _opened->image);
 
     /* Fill glyph map */
     const std::vector<Utility::ConfigurationGroup*> glyphs = _opened->conf.groups("glyph");