[drape] resource based font loading and usage

1 files changed, 49 insertions, 0 deletions

diff --git a/drape/font_texture.hpp b/drape/font_texture.hpp
new file mode 100644
index 0000000000..9edb92fc68
--- /dev/null
+++ b/drape/font_texture.hpp
@@ -0,0 +1,49 @@
+#pragma once
+
+#include "pointers.hpp"
+#include "texture.hpp"
+
+#include "../std/map.hpp"
+#include "../std/vector.hpp"
+#include "../std/string.hpp"
+
+class FontTexture : public Texture
+{
+public:
+  class GlyphKey : public Key
+  {
+  public:
+    GlyphKey(int32_t unicode) : m_unicode(unicode) {}
+
+    ResourceType GetType() const { return Texture::Glyph; }
+    int32_t GetUnicodePoint() const { return m_unicode; }
+
+  private:
+    int32_t m_unicode;
+  };
+
+  class GlyphInfo : public ResourceInfo
+  {
+  public:
+    GlyphInfo(m2::RectF const & texRect, float xOffset,
+              float yOffset, float advance);
+
+    virtual ResourceType GetType() const { return Texture::Glyph; }
+    void GetMetrics(float & xOffset, float & yOffset, float & advance) const;
+
+  private:
+    float m_xOffset, m_yOffset;
+    float m_advance;
+  };
+
+public:
+  ResourceInfo const * FindResource(Key const & key) const;
+
+  void Add(int unicodePoint, GlyphInfo const & glyphInfo);
+
+private:
+  typedef map<int, GlyphInfo> glyph_map_t;
+  glyph_map_t m_glyphs;
+};
+
+void LoadFont(string const & resourcePrefix, vector<TransferPointer<Texture> > & textures);