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path: root/src/lua/modules/graphics/bitmap.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 JinEngine
{
    namespace Lua
    {

        using namespace JinEngine::Graphics;

        typedef Ref<Bitmap>& BitmapRef;

        static inline BitmapRef checkBitmap(lua_State* L)
        {
            Proxy* proxy = (Proxy*)luax_checktype(L, 1, JIN_GRAPHICS_BITMAP);
            return proxy->getRef<Bitmap>();
        }

        static int l_gc(lua_State* L)
        {
            BitmapRef ref = checkBitmap(L);
            ref.release();
            return 0;
        }

        static int l_getWidth(lua_State* L)
        {
            BitmapRef ref = checkBitmap(L);
            int w = ref->getWidth(); 
            luax_pushinteger(L, w);
            return 1;
        }

        static int l_getHeight(lua_State* L)
        {
            BitmapRef ref = checkBitmap(L);
            int h = ref->getHeight();
            luax_pushinteger(L, h);
            return 1;
        }

        static int l_getSize(lua_State* L)
        {
            BitmapRef ref = checkBitmap(L);
            int w = ref->getWidth();
            int h = ref->getHeight();
            luax_pushinteger(L, w);
            luax_pushinteger(L, h);
            return 2;
        }

        static int l_getPixel(lua_State* L)
        {
            BitmapRef ref = checkBitmap(L);
            int x = luax_checkinteger(L, 2);
            int y = luax_checkinteger(L, 3);
            Color col = ref->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;
        }

        static int l_setPixel(lua_State* L)
        {
            BitmapRef ref = 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);
            ref->setPixel(Color(r, g, b, a), x, y);
            return 0;
        }

        static int l_clone(lua_State* L)
        {
            BitmapRef ref = checkBitmap(L);
            Bitmap* bitmap = ref.getObject();
            Bitmap* b = Bitmap::clone(bitmap);
            Proxy* proxy = (Proxy*)luax_newinstance(L, JIN_GRAPHICS_BITMAP, sizeof(Proxy));
            proxy->bind(new Ref<Bitmap>(b, JIN_GRAPHICS_BITMAP));
            return 1;
        }

        static const luaL_Reg f[] = {
            { "__gc",      l_gc        },
            { "getWidth",  l_getWidth  },
            { "getHeight", l_getHeight },
            { "getSize",   l_getSize   },
            { "getPixel",  l_getPixel  },
            { "setPixel",  l_setPixel  },
            { "clone",     l_clone     },
            { 0,           0           }
        };

        int luaopen_Bitmap(lua_State* L)
        {
            luax_newtype(L, JIN_GRAPHICS_BITMAP, f);
            return 0;
        }

    } // graphics
} // namespace JinEngine