/*★ Direct Draw で Image を表示    前田 稔 ★*/
#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
#using <Microsoft.DirectX.dll>
#using <Microsoft.DirectX.DirectDraw.dll>

using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;
using namespace Microsoft::DirectX;
using namespace Microsoft::DirectX::DirectDraw;

ref class DXDraw : public System::Windows::Forms::Form
{
    Microsoft::DirectX::DirectDraw::Device  ^draw;      // DrawDevice object.
    Microsoft::DirectX::DirectDraw::Surface ^primary;   // primary destination surface.
    Microsoft::DirectX::DirectDraw::Surface ^offscreen; // offscreen surface(bitmap loaded).
    Rectangle dest;

  public:
    // Constructor
    DXDraw()
    {
        draw = nullptr;
        primary = nullptr;
        offscreen = nullptr;
        // caption の設定
        this->Text = "Dirext Draw";
        this->ClientSize = System::Drawing::Size(480, 480);
        CreateSurfaces();
    }

    void CreateSurfaces()
    {
        // DrawDevice を生成
        draw = gcnew Device();
        draw->SetCooperativeLevel(this, CooperativeLevelFlags::Normal);
        // primary Surface を生成
        SurfaceDescription ^description = gcnew SurfaceDescription();
        description->SurfaceCaps->PrimarySurface = true;
        primary = gcnew Surface(description, draw);
        // offscreen(Image) Surface を生成
        description->Clear();
        offscreen = gcnew Surface("C:\\Data\\Test\\emiko_s.bmp", description, draw);
    }

    void Draw()
    {
        if (primary==nullptr)   return;
        dest = Rectangle(PointToScreen(Point(0,0)), ClientSize);
        primary->Draw(dest, offscreen, DrawFlags::Wait);
    }
};

//☆ Main() メソッド
int main()
{
    DXDraw ^frm;
    frm = gcnew DXDraw();
    if (frm)
    {
        frm->CreateSurfaces();      // Create Draw Surfaces
        frm->Show();

        // メッセージループ
        while(frm->Created)
        {
            frm->Draw();
            Application::DoEvents();
        }
    }
    return 0;
}