add 3D text render (WIP)

src/graphics/core/Font.hpp

@@ -3,10 +3,13 @@
 #include <memory>
 #include <string>
 #include <vector>
+#include <glm/glm.hpp>
 #include "typedefs.hpp"
 
 class Texture;
 class Batch2D;
+class Batch3D;
+class Camera;
 
 enum class FontStyle {
     none,
@@ -30,18 +33,28 @@ public:
     /// @param text selected text
     /// @param length max substring length (default: no limit)
     /// @return pixel width of the substring 
-    int calcWidth(const std::wstring& text, size_t length=-1);
+    int calcWidth(const std::wstring& text, size_t length=-1) const;
 
     /// @brief Calculate text width in pixels
     /// @param text selected text
     /// @param offset start of the substring
     /// @param length max substring length
     /// @return pixel width of the substring
-    int calcWidth(const std::wstring& text, size_t offset, size_t length);
+    int calcWidth(const std::wstring& text, size_t offset, size_t length) const;
 
     /// @brief Check if character is visible (non-whitespace)
     /// @param codepoint character unicode codepoint
     bool isPrintableChar(uint codepoint) const;
     
-    void draw(Batch2D* batch, std::wstring_view text, int x, int y);
+    void draw(Batch2D& batch, std::wstring_view text, int x, int y, float scale=1) const;
+
+    void draw(
+        Batch3D& batch,
+        const Camera& camera,
+        std::wstring_view text,
+        const glm::vec3& pos,
+        float scale = 1
+    ) const;
+
+    const Texture* getPage(int page) const;
 };