第7章 キャラクタの描画

このページはゲームループの基礎講座シリーズの１つです。
今回は第7章の「キャラクタの描画」について説明します。(戻る)

マウスクリックで描画

CASE WM_LBUTTONUP:
{
    LONG    nFaceX = (LOWORD(lParam) - (nFaceW / 2));
    LONG    nFaceY = (HIWORD(lParam) - (nFaceH / 2));
    HDC     hDC;
    
    hDC = GetDC( hWnd );
    BitBlt( hDC, nFaceX, nFaceY, nFaceW, nFaceH, hFaceChip, 0, 0, SRCCOPY );
    ReleaseDC( hWnd, hDC );
}

プロシージャ関数に組み込む

//------------------------------------------------
// ウインドウのプロシージャ関数(OK)
//------------------------------------------------
static LRESULT CALLBACK mainWindowProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
    static HDC      hFaceChip;
    static LONG     nFaceW;
    static LONG     nFaceH;
    
    switch ( uMsg ){
        CASE WM_CREATE:
            nFaceW      = 32;
            nFaceH      = 32;
            hFaceChip   = funcCreateMemDC( hWnd, nFaceW, nFaceH );
            funcFaceImage( hFaceChip, nFaceW, nFaceH );
        CASE WM_CLOSE:
            DeleteDC( hFaceChip );
            DestroyWindow( hWnd );
        CASE WM_DESTROY:
            PostQuitMessage( 0 );
        CASE WM_PAINT:
        {
            PAINTSTRUCT     ps;
            HDC             hDC;
            
            hDC = BeginPaint( hWnd, &ps );
            /*
            描画処理
            */
            EndPaint( hWnd, &ps );
        }
        CASE WM_LBUTTONUP:
        {
            LONG    nFaceX = (LOWORD(lParam) - (nFaceW / 2));
            LONG    nFaceY = (HIWORD(lParam) - (nFaceH / 2));
            HDC     hDC;
            
            hDC = GetDC( hWnd );
            BitBlt( hDC, nFaceX, nFaceY, nFaceW, nFaceH, hFaceChip, 0, 0, SRCCOPY );
            ReleaseDC( hWnd, hDC );
        }
        CASE WM_ENDSESSION:         PostMessage( hWnd, WM_CLOSE, 0, 0 );
//      CASE WM_LBUTTONDOWN:        SendMessage( hWnd, WM_NCLBUTTONDOWN, HTCAPTION, 0 );
        CASE WM_LBUTTONDBLCLK:      SetWindowPos( hWnd, HWND_TOPMOST,   0, 0, 0, 0, (SWP_NOMOVE|SWP_NOSIZE) );
        CASE WM_RBUTTONDBLCLK:      SetWindowPos( hWnd, HWND_NOTOPMOST, 0, 0, 0, 0, (SWP_NOMOVE|SWP_NOSIZE) );
        DEFAULT:                    return DefWindowProc( hWnd, uMsg, wParam, lParam );
    }
    return 0;
}

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