JSystem Font classes, SComponent cBgW (#14)

* c_bg_w.cpp OK

* JUTFont and JUTResFont partially implemented

Co-authored-by: notyouraveragehooman <65437533+notyouraveragehooman@users.noreply.github.com>
Co-authored-by: Pheenoh <pheenoh@gmail.com>

libs/SSystem/SComponent/c_bg_w.cpp

@@ -1 +1,34 @@
-// ok
+#include "SComponent/c_bg_w.h"
+
+void cBgW_BgId::Regist(int a1) {
+    mId = a1;
+}
+
+void cBgW_BgId::Release() {
+    mId = 0x100;
+}
+
+unsigned int cBgW_BgId::ChkUsed() const {
+    unsigned int temp = mId - 0x100;
+    return temp >> 0x1f;
+}
+
+extern "C" {
+
+bool cBgW_CheckBGround(float a1) {
+    return a1 >= lbl_804550E8;
+}
+
+bool cBgW_CheckBRoof(float a1) {
+    return a1 < lbl_804550EC;
+}
+
+bool cBgW_CheckBWall(float a1)
+{
+    if (!cBgW_CheckBGround(a1) && !cBgW_CheckBRoof(a1))
+        return true;
+    
+    return false;
+}
+
+}  // extern "C"