win32绘制文字 矩形 圆形 多边形 位图

此程序中包涵了一般画法和离屏绘制，相信很快就能看懂。程序中所用到的是369 * 300 名为end.bmp的位图

一般画法会闪烁，而离屏绘制不会，这就是离屏绘制的好处。

#include <iostream>#include <string.h>#include <windows.h>#include <stdlib.h>using namespace std;#define KEY_DOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0) HWND main_window_handle = NULL; HDC windowDC = NULL;  //windows屏幕设备HDC endDC = NULL;  //游戏终结图像内存设备HBITMAP endBMP = NULL;  //游戏终结图像内存句柄HDC bufferDC = NULL;          //缓冲设备环境HBITMAP bufferBMP = NULL;  //缓冲位图句柄RECT g_ClientRect;void game_main();//消息回调函数LRESULT CALLBACK textprom(HWND    hwnd,                           UINT    msg,                           WPARAM  wparam,                           LPARAM  lparam) {     // this is the main message handler of the system     PAINTSTRUCT ps;     HDC         hdc; int result;     switch (msg)     {     case WM_CREATE:        return 0;     case WM_CLOSE:result = MessageBox(hwnd,"你确定离开游戏么？","离开游戏",MB_YESNO|MB_ICONQUESTION);        if(result == IDYES)            return (DefWindowProc(hwnd,msg,wparam,lparam));//释放资源ReleaseDC(main_window_handle, endDC);ReleaseDC(main_window_handle, bufferDC);ReleaseDC(main_window_handle, windowDC);return 0;    case WM_PAINT:         hdc = BeginPaint(hwnd, &ps);         EndPaint(hwnd, &ps);         return 0;     case WM_DESTROY://释放资源ReleaseDC(main_window_handle, endDC);ReleaseDC(main_window_handle, bufferDC);ReleaseDC(main_window_handle, windowDC);        PostQuitMessage(0);         return 0;      default:         break;     }      return DefWindowProc(hwnd, msg, wparam, lparam); }/* 绘制矩形 **************************************************************************/ int Draw_Rectangle(int x1, int y1, int x2, int y2, int color) {     // this function uses Win32 API to draw a filled rectangle     HBRUSH      hbrush;     HDC         hdc;     RECT        rect;      SetRect(&rect, x1, y1, x2, y2);      hbrush = CreateSolidBrush(color);     hdc = GetDC(main_window_handle);      FillRect(hdc, &rect, hbrush);     ReleaseDC(main_window_handle, hdc);     DeleteObject(hbrush);      return 1;}//写文本 int DrawText_GUI(TCHAR *text, int x, int y, int color) {     HDC hdc;     hdc = GetDC(main_window_handle);     SetTextColor(hdc, color);     SetBkMode(hdc, TRANSPARENT);    TextOut(hdc, x, y, text, lstrlen(text));    ReleaseDC(main_window_handle, hdc);    return 1; }int APIENTRY WinMain(HINSTANCE hCurrentInst,                     HINSTANCE hPrevInstance,                     LPSTR     lpCmdLine,                     int       nCmdShow){ WNDCLASS wndClass;HWND hWnd;MSG msg;//定义窗口wndClass.style=CS_HREDRAW | CS_VREDRAW;wndClass.lpfnWndProc=textprom;wndClass.cbClsExtra=0;wndClass.cbWndExtra=0;wndClass.hInstance=hCurrentInst;wndClass.hIcon=LoadIcon(NULL,MAKEINTRESOURCE(101));wndClass.hCursor=LoadCursor(NULL,IDC_ARROW);wndClass.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);wndClass.lpszMenuName=NULL;wndClass.lpszClassName="Snake_CLASS";//注册窗口RegisterClass(&wndClass);//创建窗口hWnd=CreateWindow("Snake_CLASS","skyblue snake",WS_DLGFRAME | WS_MINIMIZEBOX | WS_SYSMENU,100,100,600,600,NULL,NULL,hCurrentInst,NULL);main_window_handle  = hWnd; //显示窗口ShowWindow(hWnd,nCmdShow);UpdateWindow(hWnd);//获取当前主窗口设备与windowDC关联windowDC=GetDC(NULL);//创建与windowDC兼容的内存设备环境bufferDC=CreateCompatibleDC(windowDC);endDC=CreateCompatibleDC(windowDC);//位图的初始化和载入位图bufferBMP=CreateCompatibleBitmap(windowDC,600,600);endBMP = (HBITMAP)LoadImage(NULL,"end.bmp",IMAGE_BITMAP,369,300,LR_LOADFROMFILE);//声明位图与设备环境的关联SelectObject(bufferDC,bufferBMP);SelectObject(endDC,endBMP);while(GetMessage(&msg,NULL,0,0)){game_main();TranslateMessage(&msg);DispatchMessage(&msg);}return 0;}void game_main(){if (KEY_DOWN(VK_ESCAPE))//按ESC键时        PostMessage(main_window_handle, WM_DESTROY, 0, 0);//这个是为了离屏绘制，获得窗口距屏幕左顶角的坐标GetWindowRect(main_window_handle, &g_ClientRect);/*关于bitblt:第2、3个参数是所要绘制的图像左上角距画布左上角的横纵坐标    第3、4个是所要绘制的图像的大小    第7、8是从图片的什么位置开始画 *///绘制外壳区域到缓冲BitBlt(bufferDC, 30, 40, 369, 300, endDC, 0, 0, SRCCOPY);SetBkMode(bufferDC, TRANSPARENT);     SetTextColor(bufferDC, RGB(250, 250, 250)); char szText[30] = "ESC键退出";TextOut(bufferDC, 160, 12, szText,strlen(szText));//将整个画面从缓冲DC拷贝出屏幕BitBlt(windowDC, g_ClientRect.left + 20, g_ClientRect.top + 26, 580, 570, bufferDC,0,0,SRCCOPY);Draw_Rectangle(30, 0, 130, 30, RGB(204, 204, 204));DrawText_GUI("黄雀在行动", 35, 7, RGB(0, 0, 0)); }

另外一些图形绘制，给出简要代码

//绘制椭圆
void Draw_Ellipse(HDC &hdc, int type, int x, int y){

int color =  RGB(0, 255, 0);

HBRUSH brush = CreateSolidBrush(color);

SelectObject(bufferDC, brush);

Ellipse(bufferDC, x, y, x + 50, y + 50);

DeleteObject(brush);

}

绘制多边形

void Draw_Polygon(HDC &hdc){

int color =  RGB(255, 0, 0);
HBRUSH brush = CreateSolidBrush(color);
POINT point_list[4];
point_list[0].x = 40;
point_list[0].y = 40;
point_list[1].x = 60;
point_list[1].y = 60;
point_list[2].x = 40;
point_list[2].y = 80;
point_list[3].x = 20;
point_list[3].y = 60;
SelectObject(hdc, brush);

Polygon(hdc, point_list, 4);//4表示4边形

DeleteObject(brush);

}