Added support for HiDPI fonts

* TrueTypeFont class now takes into account the graphics scale, in order
  to render an appropriate higher-resolution texture.

* Removed TrueTypeFont::fontCounter, since TTF_Init/TTF_Quit already
  keep a counter.

* Avoid copying the rendered string needlessly, when it already exists
  in the cache. Avoid another copy, when inserting a new chunk into the
  cache.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/graphics.h b/src/graphics.h
index 79513e2c..55f67568 100644
--- a/src/graphics.h
+++ b/src/graphics.h
@@ -203,6 +203,11 @@ class Graphics : public gcn::Graphics
         int getHeight() const { return mHeight; }
 
         /**
+         * Returns the graphics scale.
+         */
+        float getScale() const { return mScale; }
+
+        /**
          * Converts a window coordinate to a logical coordinate. Used for
          * converting mouse coordinates.
          */
@@ -237,6 +242,7 @@ class Graphics : public gcn::Graphics
     protected:
         int mWidth = 0;
         int mHeight = 0;
+        float mScale = 1.0f;
         gcn::Color mColor;
 };