WinAPI_비트맵 실습

상단 메뉴를 통해서 불러온 비트맵 사진을 관리하는 실습용 프로그램입니다

이미지를 창 크기에 맞춰 보여주고 메뉴의 source, 3x3, 4x4 메뉴 이벤트를 통해

사진을 9등분하거나 16등분하여 무작위 배치합니다.

기본크기

3x3분할 무작위배치

4x4분할 무작위배치

2시간만에 끝내야해서 빠르게 코딩하다보니 초기에 급하게 잘못짠 자료구조에 껴맞춤 감이 있네요ㅜㅠ

  ID_IMAGE_SOURCE = 원본사진

  ID_IMAGE_3BY3 = 3x3분할 무작위배치

  ID_IMAGE_4BY4 = 4x4분할 무작위배치

  ID_IMAGE_EXIT = 프로그램 종료

#include <windows.h>
#include <stdio.h>
#include <time.h>
 
#include "resource.h"
 
LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam);
void GenerateRand();
HINSTANCE hInst;
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdLine, int nCmdShow)
{
    HWND hwnd;
    MSG     msg;
    WNDCLASS    WndClass;
    hInst = hInstance;
    WndClass.style = CS_HREDRAW | CS_VREDRAW;
    WndClass.lpfnWndProc = WndProc;
    WndClass.cbClsExtra = 0;
    WndClass.cbWndExtra = 0;
    WndClass.hInstance = hInstance;
    WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
    WndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    WndClass.lpszMenuName = MAKEINTRESOURCE(IDR_MENU1);
    WndClass.lpszClassName = "Window Class Name";
    RegisterClass(&WndClass);
    hwnd = CreateWindow("Window Class Name",
        "Window Title Name",
        WS_OVERLAPPEDWINDOW,
        0,
        0,
        1000,
        800,
        NULL,
        NULL,
        hInstance,
        NULL
    );
    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return (int)msg.wParam;
}
 
enum STATE
{
    RESOURCE,
    S3BY3 = 3,
    S4BY4 = 4
};
 
int state;
int RandPos[4][4];
 
LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
    HDC hdc;
    PAINTSTRUCT ps;
    HDC memdc;
 
    static HBITMAP hBitmap;
    static BITMAP BitData;
    static RECT WinSize;
 
    switch (iMsg)
    {
    case WM_CREATE:
        hBitmap = (HBITMAP)LoadBitmap(hInst, MAKEINTRESOURCE(IDB_BITMAP1));
        state = STATE::RESOURCE;
        break;
 
    case WM_PAINT:
        hdc = BeginPaint(hwnd, &ps);
        memdc = CreateCompatibleDC(hdc);
        GetClientRect(hwnd, &WinSize);
 
        /* Draw */
        SelectObject(memdc, hBitmap);
        GetObject(hBitmap, sizeof(BITMAP), &BitData);
        //StretchBlt(hdc, 0, 0, WinSize.right, WinSize.bottom, memdc, 0, 0, BitData.bmWidth, BitData.bmHeight, SRCCOPY);
 
        switch (state)
        {
        case STATE::RESOURCE:
            StretchBlt(hdc, 0, 0, WinSize.right, WinSize.bottom, memdc, 0, 0, BitData.bmWidth, BitData.bmHeight, SRCCOPY);
            break;
        case STATE::S3BY3:
        case STATE::S4BY4:
            GenerateRand();
            for (int yPos = 0; yPos < state; yPos++)
            {
                for (int xPos = 0; xPos < state; xPos++)
                {
                    StretchBlt(hdc, WinSize.right / state * xPos, WinSize.bottom / state * yPos, WinSize.right / state, WinSize.bottom / state, memdc, (BitData.bmWidth / state) * (RandPos[xPos][yPos] % state), (BitData.bmHeight / state) * (RandPos[xPos][yPos] / state), BitData.bmWidth / state, BitData.bmHeight / state, SRCCOPY);
                }
            }
            break;
        }
 
        DeleteDC(memdc);
        EndPaint(hwnd, &ps);
        break;
 
    case WM_COMMAND:
        switch (LOWORD(wParam))
        {
        case ID_IMAGE_SOURCE:
            state = STATE::RESOURCE;
            InvalidateRgn(hwnd, NULL, true);
            break;
        case ID_IMAGE_3BY3:
            state = STATE::S3BY3;
            InvalidateRgn(hwnd, NULL, true);
            break;
        case ID_IMAGE_4BY4:
            state = STATE::S4BY4;
            InvalidateRgn(hwnd, NULL, true);
            break;
        case ID_IMAGE_EXIT:
            PostQuitMessage(0);
            break;
        }
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    }
    return DefWindowProc(hwnd, iMsg, wParam, lParam);
}
 
void GenerateRand()
{
    bool check[4][4] = { false, };
 
    srand(clock());
 
    for (int yID = 0; yID < state; yID++)
    {
        for (int xID = 0; xID < state; xID++)
        {
            RandPos[xID][yID] = (rand() % (state * state));
            if (!check[RandPos[xID][yID] % state][RandPos[xID][yID] / state])
            {
                check[RandPos[xID][yID] % state][RandPos[xID][yID] / state] = true;
            }
            else if (check[RandPos[xID][yID] % state][RandPos[xID][yID] / state])
            { 
                xID -= 1; 
            }
        }
    }
}

참고하실 분이 계시다면 리소스 파일을 따로 만들어 ID값 수정해야해요