C++ Maski

#pragma comment(lib ,"Msimg32.lib");
#include <Windows.h>
#include <math.h>
#include <vector>
#include <string>

PAINTSTRUCT PS;
HDC hdc, hdcNowy;
HBITMAP hbmOld;

RECT WndRect;
int Max = 0;

HBITMAP CreateBitmapMask(HBITMAP hbmColour, COLORREF crTransparent) {
    HDC hdcMem, hdcMem2;
    HBITMAP hbmMask, hbmOld, hbmOld2;
    BITMAP bm;

    GetObject(hbmColour, sizeof(BITMAP), &bm);
    hbmMask = CreateBitmap(bm.bmWidth, bm.bmHeight, 1, 1, NULL);

    hdcMem = CreateCompatibleDC(NULL);
    hdcMem2 = CreateCompatibleDC(NULL);

    hbmOld = (HBITMAP)SelectObject(hdcMem, hbmColour);
    hbmOld2 = (HBITMAP)SelectObject(hdcMem2, hbmMask);

    SetBkColor(hdcMem, crTransparent);

    BitBlt(hdcMem2, 0, 0, bm.bmWidth, bm.bmHeight, hdcMem, 0, 0, SRCCOPY);
    BitBlt(hdcMem, 0, 0, bm.bmWidth, bm.bmHeight, hdcMem2, 0, 0, SRCINVERT);

    SelectObject(hdcMem, hbmOld);
    SelectObject(hdcMem2, hbmOld2);
    DeleteDC(hdcMem);
    DeleteDC(hdcMem2);

    return hbmMask;
}

class Ball {
    POINT Direction;
    POINT Position;

    HBITMAP Bitmap;
    BITMAP BitmapInfo;

    HBITMAP Maska;

    int Speed = 10;
    int Y_MAX;
    bool STOP = false;

public:
    Ball(int X, int Y, int Y_max) {
        Bitmap = (HBITMAP)LoadImage(NULL, ("BM\\p.bmp"), IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
        GetObject(Bitmap, sizeof(BitmapInfo), &BitmapInfo);
        Position.x = X;
        Position.y = Y;
        Direction.x = 0;
        Direction.y = 1;
        Y_MAX = Y_max;
        Maska = CreateBitmapMask(Bitmap, RGB(255, 0, 255));
    }

    bool MoveBall() {
        if (!STOP) {
            Position.x += (Direction.x*Speed);
            Position.y += (Direction.y*Speed);
        }
        if (Position.y >= Y_MAX) {
            STOP = true;
            return true;
        }
        return false;
    }

    void PaintBall(HDC &hdc, HDC &bmhdc) {
        HBITMAP hbmOld = (HBITMAP)SelectObject(hdcNowy, Bitmap);

        BitBlt(hdc, Position.x, Position.y, BitmapInfo.bmWidth, BitmapInfo.bmHeight, bmhdc, 0, 0, SRCCOPY);

        SelectObject(hdcNowy, hbmOld);

    }
    void PaintMasked(HDC &hdc, HDC &bmhdc) {
        Bitmap = (HBITMAP)LoadImage(NULL, ("BM\\p.bmp"), IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);

        HBITMAP hbmOld = (HBITMAP)SelectObject(hdcNowy, Maska);

        BitBlt(hdc, Position.x, Position.y, BitmapInfo.bmWidth, BitmapInfo.bmHeight, hdcNowy, 0, 0, SRCAND);
        SelectObject(hdcNowy, Bitmap);
        BitBlt(hdc, Position.x, Position.y, BitmapInfo.bmWidth, BitmapInfo.bmHeight, hdcNowy, 0, 0, SRCPAINT);

        SelectObject(hdcNowy, hbmOld);
    }
};

std::vector<Ball *> balls;
float MousePos_x;
float MousePos_y;

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
    MousePos_x = LOWORD(lParam);
    MousePos_y = HIWORD(lParam);

    switch (msg) {

    case WM_LBUTTONDOWN: {
        GetClientRect(hwnd, &WndRect);
        balls.push_back(new Ball(MousePos_x - 25, MousePos_y - 25, WndRect.bottom - 50));
    }break;

    case WM_RBUTTONDOWN: {
        balls.clear();
    }break;

    case WM_PAINT: {
        hdc = BeginPaint(hwnd, &PS);

        hdcNowy = CreateCompatibleDC(hdc);

        for (int i = 0; i < balls.size(); i++) {
            //balls[i]->PaintBall(hdc, hdcNowy);
            balls[i]->PaintMasked(hdc, hdcNowy);
        }

        DeleteDC(hdcNowy);

        EndPaint(hwnd, &PS);
    }break;

    case WM_TIMER: {
        GetClientRect(hwnd, &WndRect);
        for (int i = 0; i < balls.size(); i++) {
            if (balls[i]->MoveBall())
                balls.erase(balls.begin() + i);
        }
        InvalidateRect(hwnd, &WndRect, true);
    }break;

    case WM_CLOSE: DestroyWindow(hwnd); break;
    case WM_DESTROY: PostQuitMessage(0); break;
    default: return DefWindowProc(hwnd, msg, wParam, lParam);
    }
    return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR ilCmdLine, int nCmdShow) {
    WNDCLASSEX window;
    MSG msg;
    TCHAR Class_Name[] = TEXT("OKNO_TEST"), Title[] = TEXT("Pilki");

    window.cbClsExtra = NULL;
    window.cbSize = sizeof(WNDCLASSEX);
    window.cbWndExtra = NULL;
    window.hbrBackground = (HBRUSH)(COLOR_WINDOW + 10);
    window.hCursor = LoadCursor(NULL, IDC_ARROW);
    window.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    window.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
    window.hInstance = hInstance;
    window.lpfnWndProc = WndProc;
    window.lpszClassName = Class_Name;
    window.lpszMenuName = 0;
    window.style = CS_VREDRAW | CS_HREDRAW;

    RegisterClassEx(&window);

    HWND hwnd = CreateWindowEx(WS_EX_WINDOWEDGE, Class_Name, Title, WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, 800, 600, NULL, NULL, hInstance, NULL);

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    SetTimer(hwnd, 1000, 20, NULL);

    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    UnregisterClass(Class_Name, hInstance);

    return msg.wParam;
}