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path: root/src/libjin-lua/modules/graphics/l_ttf.cpp
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#include "common/l_object.h"
#include "common/l_common.h"
#include "libjin/jin.h"

#include "l_page.h"
#include "l_text.h"

using namespace JinEngine::Graphics;
using namespace JinEngine::Graphics::Fonts;

namespace JinEngine
{
	namespace Lua
	{

		const char* Jin_Lua_TTF = "TTF";

		LUA_IMPLEMENT int l_gc(lua_State* L)
		{
			LuaObject* luaObj = (LuaObject*)luax_checktype(L, 1, Jin_Lua_TTF);
			luaObj->release();
			return 0; 
		}

		/* typeset(Text | string, lineheight, spacing) */
		LUA_IMPLEMENT int l_typeset(lua_State* L)
		{
			LuaObject* luaTTF = (LuaObject*)luax_checktype(L, 1, Jin_Lua_TTF);
			TTF* ttf = luaTTF->getObject<TTF>();
			int lineheight = luax_optnumber(L, 3, ttf->getFontSize());
			int spacing = luax_optnumber(L, 4, 0);
			Page* page = nullptr;
			if (luax_isstring(L, 2))
			{
				unsigned length;
				const char* str = luax_checklstring(L, 2, &length);
				Text text(Encode::UTF8, str, length);
				page = ttf->typeset(text, lineheight, spacing);
			}
			else if (luax_istype(L, 2, Jin_Lua_Text))
			{
				LuaObject* luaText = (LuaObject*)luax_checktype(L, 2, Jin_Lua_Text);
				Text* text = luaText->getObject<Text>();
				page = ttf->typeset(*text, lineheight, spacing);
			}
			Shared* refPage = new Shared(page);
			LuaObject* luaPage = luax_newinstance(L, Jin_Lua_Page, refPage);
			luaPage->setDependency((int)PageDependency::DEP_TTF, luaTTF);
			return 1;
		}

		LUA_EXPORT void luaopen_TTF(lua_State* L)
		{
			luaL_Reg methods[] = {
				{ "__gc",	l_gc	  },
				{ "typeset", l_typeset },
				{ 0,		 0		 }
			};
			luax_newtype(L, Jin_Lua_TTF, methods);
		}

	} // namespace Lua
} // namespace JinEngine