[update] Implemented rendering font text.

.bin/.gitignore

@@ -0,0 +1,3 @@
+*
+!/.gitignore
+!/fonts

src/sj/Font.d

@@ -1,7 +1,8 @@
 /// License: MIT
 module sj.Font;
 
-import std.exception,
+import std.conv,
+       std.exception,
        std.format,
        std.string;
 
@@ -22,8 +23,48 @@ class Font {
   }
 
   ///
-  Texture2DRef Render(string text, size_t px) {
-    assert(false);
+  Texture2DRef CreateTexture(
+      vec2i sz, string str, vec4 color, size_t px) {
+    auto text = sfText_create().enforce;
+    scope(exit) sfText_destroy(text);
+
+    sfText_setFont(text, font_);
+    sfText_setString(text, str.toStringz);
+    sfText_setCharacterSize(text, px.to!uint);
+    sfText_setFillColor(text, sfBlack);  // TODO: change color
+
+    auto buf = sfRenderTexture_create(sz.x, sz.y, false).enforce;
+    scope(exit) sfRenderTexture_destroy(buf);
+    sfRenderTexture_drawText(buf, text, null);
+
+    auto sftex = sfRenderTexture_getTexture(buf).enforce;
+
+    auto tex = Texture2D.Create();
+    Texture2DAllocator allocator;
+    with (allocator) {
+      internalFormat = GL_RGBA8;
+      size           = sz;
+      format         = GL_RED;
+      type           = GL_UNSIGNED_BYTE;
+      Allocate(tex);
+    }
+
+    gl.CopyImageSubData(
+        sfTexture_getNativeHandle(sftex),
+        GL_TEXTURE_2D,
+        0,
+        0,
+        0,
+        0,
+        tex.id,
+        GL_TEXTURE_2D,
+        0,
+        0,
+        0,
+        0,
+        sz.x, sz.y, 1
+      );
+    return tex;
   }
 
  private: