Create a text shader and font utility

scwx-qt/source/scwx/qt/util/font.hpp

@@ -0,0 +1,51 @@
+#pragma once
+
+#include <scwx/qt/util/gl.hpp>
+
+#include <memory>
+#include <string>
+
+#include <glm/glm.hpp>
+
+namespace scwx
+{
+namespace qt
+{
+namespace util
+{
+
+struct Glyph
+{
+   GLuint     textureId;
+   glm::ivec2 size;    // pixels
+   glm::ivec2 bearing; // pixels
+   GLint      advance; // 1/64 pixels
+};
+
+class FontImpl;
+
+class Font
+{
+public:
+   explicit Font(const std::string& resource);
+   ~Font();
+
+   Font(const Font&) = delete;
+   Font& operator=(const Font&) = delete;
+
+   Font(Font&&)  = delete;
+   Font& operator=(Font&&) = delete;
+
+   void GenerateGlyphs(OpenGLFunctions&                 gl,
+                       std::unordered_map<char, Glyph>& glyphs,
+                       unsigned int                     height);
+
+   static std::shared_ptr<Font> Create(const std::string& resource);
+
+private:
+   std::unique_ptr<FontImpl> p;
+};
+
+} // namespace util
+} // namespace qt
+} // namespace scwx