Wrap up multiple font styles into EpdFontFamily

lib/EpdFont/EpdFontFamily.cpp

@@ -0,0 +1,37 @@
+#include "EpdFontFamily.h"
+
+const EpdFont* EpdFontFamily::getFont(const EpdFontStyle style) const {
+  if (style == BOLD && bold) {
+    return bold;
+  }
+  if (style == ITALIC && italic) {
+    return italic;
+  }
+  if (style == BOLD_ITALIC) {
+    if (boldItalic) {
+      return boldItalic;
+    }
+    if (bold) {
+      return bold;
+    }
+    if (italic) {
+      return italic;
+    }
+  }
+
+  return regular;
+}
+
+void EpdFontFamily::getTextDimensions(const char* string, int* w, int* h, const EpdFontStyle style) const {
+  getFont(style)->getTextDimensions(string, w, h);
+}
+
+bool EpdFontFamily::hasPrintableChars(const char* string, const EpdFontStyle style) const {
+  return getFont(style)->hasPrintableChars(string);
+}
+
+const EpdFontData* EpdFontFamily::getData(const EpdFontStyle style) const { return getFont(style)->data; }
+
+const EpdGlyph* EpdFontFamily::getGlyph(const uint32_t cp, const EpdFontStyle style) const {
+  return getFont(style)->getGlyph(cp);
+};