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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