2V0-g: port the .fnt font pipeline over a FreeType GDI emulation

CGraphicText, CGraphicFontTexture and CGraphicDib are the 40250 bodies
verbatim; CGraphicTextInstance is verbatim except that its D3D draws become
UI render commands (one image quad per glyph, Bar for cursor/underline).

- platform/Win32Gdi.cpp: the GDI subset those files call, over vendored
  FreeType 2.13.3, following GDI's LOGFONT cell height, win metrics and gasp
  rules; system font lookup with substitute and CJK fallback faces
- Win32Crt: MultiByteToWideChar / WideCharToMultiByte (UTF-8 and 1252 by
  hand, other code pages through iconv)
- CGraphicImageTexture memory textures: glyph pages reach Godot as
  "mem:<id>@<revision>"; Metin2PythonHost.memory_texture + Canvas cache
- Util.cpp code page / font face table, SetDefaultCodePage at boot,
  DefaultFont_* block, fnt resource type, GetMaxTextureWidth/Height
- TextTag, StringCodec, Arabic, Vietnamese copied from 40250
- tests: port.text (Tahoma 12 metrics, alignment, CP949), port.app_loop
  and python_host_test.gd now check glyph quads instead of text commands

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

extension/src/platform/EterLib/Util.cpp

@@ -1,18 +1,109 @@
-// 40250 EterLib/Util.cpp 的“默认代码页”那一小块。
+// 40250 EterLib/Util.cpp:140-297, the default code page and font face.
 //
-// Util.cpp 本身是逻辑单元（LoadTextData / base64 / TokenTo*），但代码页这几个函数和它们旁边的
-// GetFontFaceFromCodePage 是连在一起的，后者靠 GDI 的 EnumFontFamiliesEx 枚举字体，win32 shim 里没有，
-// 真正的实现要等 2V0-f 的文字渲染。所以整份 Util.cpp 的移植留到那时，这里只放现在真正被调用到的
-// GetDefaultCodePage：EterPythonLib/PythonWindow.cpp 的 CTextLine::OnChangePosition 用它判断 CP_ARABIC。
-//
-// 默认值和 40250 一致：gs_codePage = 0，也就是“还没有 SetDefaultCodePage”。40250 在
-// PythonApplication 里根据 locale 调 SetDefaultCodePage()，那条路径同样等 2V0-d。
+// The rest of Util.cpp (LoadTextData / base64 / TokenTo*) is logic and not here. The 9x face table has
+// CP949/Shift-JIS/GBK/Big5 literals, so this block is copied by hand instead of port_copy.
 #include "EterLib/StdAfx.h"
 #include "EterLib/Util.h"
+#include "EterLocale/CodePageId.h"
 
-static DWORD gs_codePage = 0;
+static std::string	gs_fontFace="";
+static DWORD		gs_codePage=0;
+
+int GetCharsetFromCodePage(WORD codePage)
+{
+	switch( codePage )
+	{
+	case CP_932:
+		return SHIFTJIS_CHARSET;
+	case CP_949:
+		return HANGUL_CHARSET;
+	case CP_936:
+		return GB2312_CHARSET;
+	case CP_950:
+		return CHINESEBIG5_CHARSET;
+	case CP_1253:
+		return GREEK_CHARSET;
+	case CP_1254:
+		return TURKISH_CHARSET;
+	case CP_1255:
+		return HEBREW_CHARSET;
+	case CP_1256:
+		return ARABIC_CHARSET;
+	case CP_1257:
+		return BALTIC_CHARSET;
+	case CP_1258:
+		return VIETNAMESE_CHARSET;
+	case CP_874:
+		return THAI_CHARSET;
+	case CP_1250:
+		return EASTEUROPE_CHARSET;
+	case CP_1251:
+		return RUSSIAN_CHARSET;
+	default:
+		return DEFAULT_CHARSET;
+	}
+}
+
+
+const char* GetFontFaceFromCodePageNT(WORD codePage)
+{
+	switch( codePage )
+	{
+	case CP_932:
+		return "MS PGothic";
+	case CP_949:
+		return "GulimChe";
+	case CP_936:
+		return "SimSun";
+	case CP_950:
+		return "MingLiU";
+	case CP_874:
+		return "Tahoma";
+	case CP_1252:
+		return "Arial";
+	case CP_1256:
+		return "Tahoma"; 
+	case CP_1258:
+		return "Tahoma"; 
+	case CP_65001:
+		return "Arial";
+	default:
+		return "Arial";
+	}
+}
 
 DWORD GetDefaultCodePage()
 {
 	return gs_codePage;
 }
+
+const char * GetDefaultFontFace()
+{
+	return gs_fontFace.c_str();
+}
+
+// PORT: 40250 asks EnumFontFamiliesEx for the 9x (native-script) face name, then the NT one. The native
+// names never match a font file here; CreateFontIndirect (platform/Win32Gdi.cpp) substitutes a missing
+// face, so the NT name is the answer.
+const char*	GetFontFaceFromCodePage(WORD codePage)
+{
+	return GetFontFaceFromCodePageNT(codePage);
+}
+
+void SetDefaultFontFace(const char* fontFace)
+{
+	gs_fontFace=fontFace;
+}
+
+bool SetDefaultCodePage(DWORD codePage)
+{
+	gs_codePage=codePage;
+
+	std::string fontFace=GetFontFaceFromCodePage(codePage);
+	if (fontFace.empty())
+		return false;
+
+	SetDefaultFontFace(fontFace.c_str());
+
+	return true;
+}