Direct2D 学习笔记

1 ID2D1Factory *m_pD2DFactory ;
2 hr = D2D1CreateFactory (D2D1_FACTORY_TYPE_SINGLE_THREADED, & m_pD2DFactory);

 1 // Obtain the size of the drawing area.
 2 RECT rc ;
 3 GetClientRect(hwnd , &rc );
 4 
 5 // Create a Direct2D render target              
 6 ID2D1HwndRenderTarget * pRT = NULL ;
 7 HRESULT hr = pD2DFactory->CreateHwndRenderTarget(
 8     D2D1::RenderTargetProperties (),
 9     D2D1::HwndRenderTargetProperties (
10         hwnd,
11         D2D1::SizeU (
12             rc. right - rc. left,
13             rc. bottom - rc. top)
14    ),
15    & pRT
16 );

1 ID2D1SolidColorBrush * pBlackBrush = NULL ;
2 if (SUCCEEDED (hr )) {
3    pRT-> CreateSolidColorBrush(
4            D2D1::ColorF (D2D1::ColorF:: Black),
5           & pBlackBrush
6           );
7 }

 1 pRT->BeginDraw();
 2 
 3 pRT->DrawRectangle(
 4     D2D1::RectF(
 5     rc.left + 100.0f,
 6     rc.top + 100.0f,
 7     rc.right - 100.0f,
 8     rc.bottom - 100.0f),
 9     pBlackBrush);
10 
11 HRESULT hr = pRT->EndDraw();

1 SafeRelease(pRT);
2 SafeRelease(pBlackBrush);
3 SafeRelease(pD2DFactory);