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path: root/src/lua/modules/graphics/ttf.cpp
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#include "lua/modules/luax.h"
#include "lua/modules/types.h"
#include "lua/common/common.h"
#include "libjin/jin.h"

namespace jin
{
namespace lua
{

    using namespace JinEngine::Graphics;

    static int l_gc(lua_State* L)
    {
        Proxy* proxy = (Proxy*)luax_checktype(L, 1, JIN_GRAPHICS_TTF);
		{
			/* release ttf data */
			Ref<TTF>* ttf = &proxy->getRef<TTF>();
			RefBase* data = (RefBase*)ttf->getUserdata();
			data->release();
		}
        proxy->release();
        return 0; 
    }

	/* typeset(Text | string, lineheight, spacing) */
    static int l_typeset(lua_State* L)
    {
        Proxy* p = (Proxy*)luax_checktype(L, 1, JIN_GRAPHICS_TTF);
		TTF* ttf = p->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_GRAPHICS_TEXT))
		{
			Proxy* p2 = (Proxy*)luax_checktype(L, 2, JIN_GRAPHICS_TEXT);
			Text* text = p2->getObject<Text>();
			page = ttf->typeset(*text, lineheight, spacing);
		}
        Proxy* proxy = (Proxy*)luax_newinstance(L, JIN_GRAPHICS_PAGE, sizeof(Proxy));
		Ref<Page>* refPage = new Ref<Page>(page, JIN_GRAPHICS_PAGE);
		{
			/* retain related ttf */
			Ref<TTF>& refTTF = p->getRef<TTF>();
			refTTF.retain();
			refPage->setUserdata(&refTTF);
		}
		proxy->bind(refPage);
        return 1;
    }

    static const luaL_Reg f[] = {
        { "__gc",    l_gc      },
        { "typeset", l_typeset },
        { 0,         0         }
    };

    int luaopen_TTF(lua_State* L)
    {
        luax_newtype(L, JIN_GRAPHICS_TTF, f);

        return 0;
    }

} // lua
} // jin