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path: root/src/libjin-lua/modules/graphics/je_lua_bitmap.cpp
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#include "common/je_lua_common.h"
#include "common/je_lua_object.h"

#include "libjin/jin.h"
#include "je_lua_bitmap.h"

using namespace JinEngine::Graphics;

namespace JinEngine
{
    namespace Lua
    {

        const char* Jin_Lua_Bitmap = "Bitmap";

        LUA_IMPLEMENT inline Bitmap* checkBitmap(lua_State* L)
        {
            LuaObject* luaObj = luax_checkobject(L, 1, Jin_Lua_Bitmap);
            return luaObj->getObject<Bitmap>();
        }

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

        LUA_IMPLEMENT int l_getWidth(lua_State* L)
        {
            Bitmap* bitmap = checkBitmap(L);
            int w = bitmap->getWidth(); 
            luax_pushinteger(L, w);
            return 1;
        }

        LUA_IMPLEMENT int l_getHeight(lua_State* L)
        {
            Bitmap* bitmap = checkBitmap(L);
            int h = bitmap->getHeight();
            luax_pushinteger(L, h);
            return 1;
        }

        LUA_IMPLEMENT int l_getSize(lua_State* L)
        {
            Bitmap* bitmap = checkBitmap(L);
            int w = bitmap->getWidth();
            int h = bitmap->getHeight();
            luax_pushinteger(L, w);
            luax_pushinteger(L, h);
            return 2;
        }

        LUA_IMPLEMENT int l_getPixel(lua_State* L)
        {
            Bitmap* bitmap = checkBitmap(L);
            int x = luax_checkinteger(L, 2);
            int y = luax_checkinteger(L, 3);
            Color col = bitmap->getPixel(x, y);
            luax_pushinteger(L, col.r);
            luax_pushinteger(L, col.g);
            luax_pushinteger(L, col.b);
            luax_pushinteger(L, col.a);
            return 4;
        }

        LUA_IMPLEMENT int l_setPixel(lua_State* L)
        {
            Bitmap* bitmap = checkBitmap(L);
            int x = luax_checkinteger(L, 2);
            int y = luax_checkinteger(L, 3);
            if (!luax_istable(L, 4))
            {
                luax_typerror(L, 4, "table");
                return 1;
            }
            unsigned int r = luax_rawgetnumber(L, 4, 1);
            unsigned int g = luax_rawgetnumber(L, 4, 2);
            unsigned int b = luax_rawgetnumber(L, 4, 3);
            unsigned int a = luax_rawgetnumber(L, 4, 4);
            bitmap->setPixel(Color(r, g, b, a), x, y);
            return 0;
        }

        LUA_IMPLEMENT int l_clone(lua_State* L)
        {
            Bitmap* bitmap = checkBitmap(L);
            Bitmap* b = bitmap->clone();
            LuaObject* luaObj = luax_newinstance(L, Jin_Lua_Bitmap, new Shared(b));
            return 1;
        }
        
        LUA_EXPORT void luaopen_Bitmap(lua_State* L)
        {
            luaL_Reg methods[] = {
                { "__gc",      l_gc        },
                { "getWidth",  l_getWidth  },
                { "getHeight", l_getHeight },
                { "getSize",   l_getSize   },
                { "getPixel",  l_getPixel  },
                { "setPixel",  l_setPixel  },
                { "clone",     l_clone     },
                { 0,           0           }
            };
            luax_newtype(L, Jin_Lua_Bitmap, methods);
        }

    } // namespace Graphics
} // namespace JinEngine