VN System improved.

src/dawn/display/font/Font.hpp

@@ -37,6 +37,17 @@ namespace Dawn {
         struct FontMeasure *info
       ) = 0;
 
+      /**
+       * Fonts need to be initialized before they can actually be used, but I
+       * really want to keep things kind-of non-blocking, so for the time being
+       * this hack works around it, fonts can decide to return false if they are
+       * not "ready for buffering", and the item intending to use the font is
+       * required to decide when it should actually request buffering.
+       * 
+       * @return True if ready for buffering, otherwise false.
+       */
+      virtual bool_t isReady() = 0;
+
       /**
        * Returns the texture that is used for a given font.
        * 

src/dawn/display/font/FontMeasure.hpp

@@ -40,12 +40,56 @@ namespace Dawn {
        */
       void addLine(int32_t start, int32_t length);
 
+      /**
+       * Returns the width of this measured string.
+       * 
+       * @return Width of the pre measured string.
+       */
       float_t getWidth();
+
+      /**
+       * Returns the height of the measured string.
+       * 
+       * @return Height of the pre measured string.
+       */
       float_t getHeight();
+
+      /**
+       * Returns the count of quads on the given line.
+       * 
+       * @param line Which line to get the count of quads for.
+       * @return Count of quads on that line.
+       */
       int32_t getQuadsOnLine(int32_t line);
+
+      /**
+       * Returns the index, of which quad is the first quad on the given line.
+       * 
+       * @param line Line to get the quad index of.
+       * @return The quad index of that line.
+       */
       int32_t getQuadIndexOnLine(int32_t line);
+
+      /**
+       * Returns the height of the count of lines provided.
+       * 
+       * @param lineCount Count of lines to get the height of.
+       * @return Height of the given count of lines.
+       */
       float_t getHeightOfLineCount(int32_t lineCount);
+
+      /**
+       * Returns the count of lines in this string.
+       * 
+       * @return Count of lines.
+       */
       size_t getLineCount();
+
+      /**
+       * Returns the count of quads in this string.
+       * 
+       * @return Total count of quads.
+       */
       int32_t getQuadCount();
   };
 }

src/dawn/display/font/TrueTypeFont.cpp

@@ -56,6 +56,7 @@ void TrueTypeFont::buffer(
   assertNotNull(info);
   assertTrue(fontSize > 0);
   assertTrue(maxWidth == -1 || maxWidth > 0);
+  assertTrue(this->isReady());
 
   auto stringLength = text.length();
   if(stringLength == 0) {
@@ -189,6 +190,10 @@ void TrueTypeFont::buffer(
   delete quads;
 }
 
+bool_t TrueTypeFont::isReady() {
+  return this->texture.isReady();
+}
+
 Texture * TrueTypeFont::getTexture() {
   return &this->texture;
 }

src/dawn/display/font/TrueTypeFont.hpp

@@ -74,6 +74,7 @@ namespace Dawn {
         Mesh *mesh,
         struct FontMeasure *info
       ) override;
+      bool_t isReady() override;
       Texture * getTexture()  override;
       void draw(Mesh *mesh, int32_t startCharacter, int32_t length) override;
       float_t getLineHeight(float_t fontSize) override;