//#include<windows.h>
//#include<D2D1.h>
//
/*
配置:C++附加包含目录D:\Windows Kits\10\Include\10.0.17763.0\um(D2d1.h
附加库目录D:\Windows Kits\10\Lib\10.0.17134.0\um\x86 (D2d1.lib
附加依赖项:D2d1.lib
子系统:窗口(/ SUBSYSTEM:WINDOWS)
*/
#include <windows.h>
#include <D2D1.h>
#define SAFE_RELEASE(P) if(P){P->Release() ; P = NULL ;}
ID2D1Factory* g_pD2DFactory = NULL; // Direct2D factory
ID2D1HwndRenderTarget* g_pRenderTarget = NULL; // Render target
ID2D1SolidColorBrush* g_pBlackBrush = NULL; // A black brush, reflect the line color
VOID CreateD2DResource(HWND hWnd)
{
if (!g_pRenderTarget)
{
HRESULT hr;
//创建工厂 凭空创造 不需要对象 直接产生一个工厂
hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED, &g_pD2DFactory);
if (FAILED(hr))
{
MessageBox(hWnd, "Create D2D factory failed!", "Error", 0);
return;
}
// Obtain the size of the drawing area
RECT rc;
GetClientRect(hWnd, &rc);
// Create a Direct2D render target
//通过工厂创建RenderTarget渲染对象
hr = g_pD2DFactory->CreateHwndRenderTarget(
D2D1::RenderTargetProperties(),
D2D1::HwndRenderTargetProperties(
hWnd,
D2D1::SizeU(rc.right - rc.left, rc.bottom - rc.top)
),
&g_pRenderTarget
);
if (FAILED(hr))
{
MessageBox(hWnd, "Create render target failed!", "Error", 0);
return;
}
// Create a brush
//通过渲染对象发 创建一个固定颜色的画刷
hr = g_pRenderTarget->CreateSolidColorBrush(
D2D1::ColorF(D2D1::ColorF::Pink),
&g_pBlackBrush
);
if (FAILED(hr))
{
MessageBox(hWnd, "Create brush failed!", "Error", 0);
return;
}
}
}
VOID DrawRectangle(HWND hwnd)
{
CreateD2DResource(hwnd);
//绘制的代码要放在BeginDraw和EndDraw函数之间
g_pRenderTarget->BeginDraw();
//调用Clear函数可以将Render target清除为指定的背景色
// Clear background color to White
g_pRenderTarget->Clear(D2D1::ColorF(D2D1::ColorF::White));
//使用画刷来 DrawRectangle函数用来绘制矩形
g_pRenderTarget->DrawRectangle(
D2D1::RectF(10.f, 100.f, 500.f, 500.f),
g_pBlackBrush
);
g_pRenderTarget->DrawLine(
D2D1::Point2F(100.f, 100.f),
D2D1::Point2F(500.f, 500.f),
g_pBlackBrush);
D2D1_ROUNDED_RECT roundedRect = D2D1::RoundedRect(
D2D1::RectF(100.f, 100.f, 500.f, 500.f),
30.0f,
50.0f
);
g_pRenderTarget->DrawRoundedRectangle(roundedRect, g_pBlackBrush, 1.0f);
D2D1_ELLIPSE ellipse = D2D1::Ellipse(D2D1::Point2F(100.0f, 100.0f), 100.0f, 50.0f);
g_pRenderTarget->DrawEllipse(ellipse, g_pBlackBrush);
ellipse = D2D1::Ellipse(D2D1::Point2F(50.0f, 50.0f), 50.0f, 50.0f);
g_pRenderTarget->DrawEllipse(ellipse, g_pBlackBrush);
ID2D1PathGeometry* g_pLeftMountainGeometry = NULL;
//创建Path geometry路径图形
HRESULT hr2 = g_pD2DFactory->CreatePathGeometry(&g_pLeftMountainGeometry);
if (SUCCEEDED(hr2))
{
//ID2D1GeometrySink用来绘画
ID2D1GeometrySink *pSink = NULL;
HRESULT hr3 = g_pLeftMountainGeometry->Open(&pSink); // 获取Sink对象
if (SUCCEEDED(hr3))
{
pSink->BeginFigure(D2D1::Point2F(346,255), D2D1_FIGURE_BEGIN_FILLED);
// 添加图形
D2D1_POINT_2F points[5] = {
D2D1::Point2F(267, 177),
D2D1::Point2F(236, 192),
D2D1::Point2F(212, 160),
D2D1::Point2F(156, 255),
D2D1::Point2F(346, 255),
};
pSink->AddLines(points, ARRAYSIZE(points));
pSink->EndFigure(D2D1_FIGURE_END_CLOSED);
}
pSink->Close(); // 关闭Sink对象
}
//轮廓
g_pRenderTarget->DrawGeometry(g_pLeftMountainGeometry, g_pBlackBrush, 1.f);
//填充
g_pBlackBrush->SetColor(D2D1::ColorF(D2D1::ColorF::OliveDrab, 1.f));
g_pRenderTarget->FillGeometry(g_pLeftMountainGeometry, g_pBlackBrush);
//enddraw返回是否画成功了
HRESULT hr = g_pRenderTarget->EndDraw();
if (FAILED(hr))
{
MessageBox(NULL, "Draw failed!", "Error", 0);
return;
}
}
//每个COM对象都有一个Release方法,用来释放自己,这里我们定义一个宏来释放COM对象。
VOID Cleanup()
{
SAFE_RELEASE(g_pRenderTarget);
SAFE_RELEASE(g_pBlackBrush);
SAFE_RELEASE(g_pD2DFactory);
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
//D2D响应WM_PAINT消息进行渲染
case WM_PAINT:
DrawRectangle(hwnd);
return 0;
case WM_KEYDOWN:
{
switch (wParam)
{
case VK_ESCAPE:
SendMessage(hwnd, WM_CLOSE, 0, 0);
break;
default:
break;
}
}
break;
case WM_DESTROY:
Cleanup();
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
WNDCLASSEX winClass;
winClass.lpszClassName = "Direct2D";
winClass.cbSize = sizeof(WNDCLASSEX);
winClass.style = CS_HREDRAW | CS_VREDRAW;
winClass.lpfnWndProc = WndProc;//函数调用 lpfn (long point function)消息处理
winClass.hInstance = hInstance;
winClass.hIcon = NULL;
winClass.hIconSm = NULL;
winClass.hCursor = LoadCursor(NULL, IDC_ARROW);
winClass.hbrBackground = NULL;
winClass.lpszMenuName = NULL;
winClass.cbClsExtra = 0;
winClass.cbWndExtra = 0;
if (!RegisterClassEx(&winClass))
{
MessageBox(NULL, TEXT("This program requires Windows NT!"), "error", MB_ICONERROR);
return 0;
}
HWND hwnd = CreateWindowEx(NULL,
"Direct2D", // window class name
"Draw Rectangle", // window caption
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // initial x position
CW_USEDEFAULT, // initial y position
600, // initial x size
600, // initial y size
NULL, // parent window handle
NULL, // window menu handle
hInstance, // program instance handle
NULL); // creation parameters
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
MSG msg;
ZeroMemory(&msg, sizeof(msg));
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
D2D实例
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转载自blog.csdn.net/baidu_39486224/article/details/105639030
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