Archive for 7月 22nd, 2012

  1. Hello, DirectX(C言語) World!

    Posted on 7月 22nd, 2012 by cx20

    Win32 DirectX(C言語)

    DirectX はマイクロソフトが Wnidows 用に開発したマルチメディア処理用 API である。
    以下は C++ における DirectX アプリケーション の例となっている。

    ソースコード

    hello.cpp
    raw download
    #include <windows.h>
#include <tchar.h>
#include <d3d9.h>
#include <d3dx9.h>
 
LPDIRECT3D9         g_pD3D       = NULL;
LPDIRECT3DDEVICE9   g_pd3dDevice = NULL;
LPD3DXFONT          g_pd3dFont   = NULL;
RECT                g_rect       = { 0, 0, 0, 0 };
 
HRESULT InitD3D( HWND hWnd );
HRESULT InitFont();
VOID Cleanup();
VOID Render();
 
HRESULT InitD3D( HWND hWnd )
{
    HRESULT hr;
    D3DPRESENT_PARAMETERS d3dpp;
    g_pD3D = Direct3DCreate9( D3D_SDK_VERSION );
    if( g_pD3D == NULL )
    {
        return E_FAIL;
    }
 
    d3dpp.BackBufferWidth             = 0;
    d3dpp.BackBufferHeight            = 0;
    d3dpp.BackBufferFormat            = D3DFMT_UNKNOWN;
    d3dpp.BackBufferCount             = 0;
    d3dpp.MultiSampleType             = D3DMULTISAMPLE_NONE;
    d3dpp.MultiSampleQuality          = 0;
    d3dpp.SwapEffect                  = D3DSWAPEFFECT_DISCARD;
    d3dpp.hDeviceWindow               = NULL;
    d3dpp.Windowed                    = TRUE;
    d3dpp.EnableAutoDepthStencil      = 0;
    d3dpp.AutoDepthStencilFormat      = D3DFMT_UNKNOWN;
    d3dpp.Flags                       = 0;
    d3dpp.FullScreen_RefreshRateInHz  = 0;
    d3dpp.PresentationInterval        = 0;
 
    hr = g_pD3D->lpVtbl->CreateDevice(
        g_pD3D,
        D3DADAPTER_DEFAULT,
        D3DDEVTYPE_HAL,
        hWnd,
        D3DCREATE_SOFTWARE_VERTEXPROCESSING,
        &d3dpp,
        &g_pd3dDevice
    );
 
    if( FAILED( hr ) )
    {
        return E_FAIL;
    }
 
    return S_OK;
}
 
HRESULT InitFont()
{
    HRESULT hr;
 
    D3DXFONT_DESC lf;
    lf.Height          = 16;
    lf.Width           = 0;
    lf.Weight          = 0;
    lf.MipLevels       = 1;
    lf.Italic          = 0;
    lf.CharSet         = SHIFTJIS_CHARSET;
    lf.OutputPrecision = OUT_TT_ONLY_PRECIS;
    lf.Quality         = PROOF_QUALITY;
    lf.PitchAndFamily  = FIXED_PITCH | FF_MODERN;
    lstrcpy( lf.FaceName, _T("ＭＳ ゴシック") );
 
    hr = D3DXCreateFontIndirect( g_pd3dDevice, &lf, &g_pd3dFont );
    if ( FAILED( hr ) )
    {
        Cleanup();
        return hr;
    }
 
    hr = g_pd3dFont->lpVtbl->DrawText(
        g_pd3dFont,
        NULL, 
        _T("Hello, DirectX World!"),
        -1,
        &g_rect,
        DT_CALCRECT | DT_LEFT | DT_SINGLELINE,
        0xffffffff
    );
 
    if ( FAILED( hr ) )
    {
        Cleanup();
        return hr;
    }
 
    return hr;
}
 
VOID Cleanup()
{
    if ( g_pd3dFont != NULL )
    {
        g_pd3dFont->lpVtbl->Release( g_pd3dFont );
    }
 
    if( g_pd3dDevice != NULL )
    {
        g_pd3dDevice->lpVtbl->Release( g_pd3dDevice );
    }
 
    if( g_pD3D != NULL )
    {
        g_pD3D->lpVtbl->Release( g_pD3D );
    }
}
 
VOID Render()
{
    if( g_pd3dDevice == NULL )
    {
        return;
    }
 
    if ( g_pd3dFont == NULL )
    {
        return;
    }
 
    g_pd3dDevice->lpVtbl->Clear(
        g_pd3dDevice,
        0, 
        NULL,
        D3DCLEAR_TARGET,
        D3DCOLOR_XRGB( 0, 0, 255 ),
        1.0f,
        0
    );
 
    if( SUCCEEDED( g_pd3dDevice->lpVtbl->BeginScene( g_pd3dDevice ) ) )
    {
        g_pd3dFont->lpVtbl->DrawText( 
            g_pd3dFont,
            NULL,
            _T("Hello, DirectX World!"),
            -1,
            &g_rect,
            DT_LEFT | DT_SINGLELINE,
            0xffffffff
        );
 
        g_pd3dDevice->lpVtbl->EndScene( g_pd3dDevice );
    }
 
    g_pd3dDevice->lpVtbl->Present( g_pd3dDevice, NULL, NULL, NULL, NULL );
}
 
LRESULT CALLBACK WndProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam )
{
    switch( message )
    {
        case WM_DESTROY:
            Cleanup();
            PostQuitMessage( 0 );
            return 0;
 
        case WM_PAINT:
            Render();
            ValidateRect( hWnd, NULL );
            return 0;
    }
 
    return DefWindowProc( hWnd, message, wParam, lParam );
}
 
int APIENTRY _tWinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow )
{
    LPCTSTR lpszClassName = _T("helloWindow");
    LPCTSTR lpszWindowName = _T("Hello, World!");
    MSG msg;
    HWND hWnd;
 
    WNDCLASSEX wcex;
    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.style          = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc    = WndProc;
    wcex.cbClsExtra     = 0;
    wcex.cbWndExtra     = 0;
    wcex.hInstance      = hInstance;
    wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
    wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName   = NULL;
    wcex.lpszClassName  = lpszClassName;
    wcex.hIconSm        = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
 
    RegisterClassEx(&wcex);
    hWnd = CreateWindow(
        lpszClassName,
        lpszWindowName,
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, 640, 480,
        NULL, NULL, hInstance, NULL
    );
 
    InitD3D( hWnd );
    InitFont();
 
    ShowWindow( hWnd, SW_SHOWDEFAULT );
    UpdateWindow( hWnd );
 
    while( GetMessage( &msg, NULL, 0, 0 ) )
    {
        TranslateMessage( &msg );
        DispatchMessage( &msg );
    }
 
    return 0;
}

    コンパイル方法

    C:¥> SET INCLUDE=%DXSDK_DIR%INCLUDE;%INCLUDE%
C:¥> SET LIB=%DXSDK_DIR%Libx86;%LIB%
C:¥> cl hello.c ^
         /link ^
         user32.lib ^
         dxguid.lib ^
         d3d9.lib ^
         d3dx9.lib ^
         /SUBSYSTEM:WINDOWS

    実行結果

    +------------------------------------------+
|Hello, World!                    [_][~][X]|
+------------------------------------------+
|Hello, DirectX World!                     |
|                                          |
|                                          |
|                                          |
|                                          |
|                                          |
|                                          |
|                                          |
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|                                          |
+------------------------------------------+