使用C++绘制GDI位图的基本编写实例
1、加载位图
2、建立兼容DC
3、选择之前的位图对象
4、用贴图函数BitBlt()
HBITMAPbitmap=(HBITMAP)LoadImage(NULL,L"Name.bmp",IMAGE_BITMAP,high,length,LR_LOADFROMFILE); HWNDtmp=CreateCompatiable(g_hdc); SelectObject(tmp,bitmap); BitBlt(g_hdc,0,0,high,length,tmp,0,0,SRCCOPY);
Demo完整代码:
#include<windows.h>
#include<time.h>
constintTAR_HIGH=800;
constintTAR_WEIGHT=600;
constwchar_tTAR_TITLE[]=L"致我们不磨灭的青春和理想-建大英雄传";
HDCg_hdc=NULL;
HDCg_mdc=NULL;
HBITMAPg_hbitmap=NULL;
voidGame_Paint(HWNDhwnd)
{
SelectObject(g_mdc,g_hbitmap);
BitBlt(g_hdc,0,0,TAR_HIGH,TAR_WEIGHT,g_mdc,0,0,SRCCOPY);
}
boolGame_Init(HWNDhwnd)
{
g_hdc=GetDC(hwnd);
//在这里做初始化工作
g_hbitmap=(HBITMAP)LoadImage(NULL,L"content.bmp",IMAGE_BITMAP,TAR_HIGH,TAR_WEIGHT,LR_LOADFROMFILE);
//建立DC
g_mdc=CreateCompatibleDC(g_hdc);
Game_Paint(hwnd);
ReleaseDC(hwnd,g_hdc);
return1;
}
boolGame_Clear(HWNDhwnd)
{
DeleteObject(g_hbitmap);
DeleteDC(g_mdc);
return1;
}
LRESULTCALLBACKSdjzuProc(HWNDhwnd,UINTmessage,WPARAMwParam,LPARAMlParam)
{
switch(message)
{
PAINTSTRUCTpaintstruct;
caseWM_PAINT:
//新增设备环境句柄调用
g_hdc=BeginPaint(hwnd,&paintstruct);
Game_Init(hwnd);
EndPaint(hwnd,&paintstruct);
ValidateRect(hwnd,NULL);
break;
caseWM_KEYDOWN:
if(wParam=VK_ESCAPE)
DestroyWindow(hwnd);
break;
caseWM_DESTROY:
PostQuitMessage(0);
break;
default:
returnDefWindowProc(hwnd,message,wParam,lParam);
}
return0;
}
intWINAPIWinMain(__inHINSTANCEhInstance,__in_optHINSTANCEhPrevInstance,__inLPSTRlpCmdLine,__inintnShowCmd)
{
WNDCLASSEXwndclass={0};
wndclass.cbSize=sizeof(WNDCLASSEX);
wndclass.style=CS_HREDRAW|CS_VREDRAW;
wndclass.lpfnWndProc=SdjzuProc;
wndclass.cbClsExtra=0;
wndclass.cbWndExtra=0;
wndclass.hInstance=hInstance;
wndclass.hIcon=(HICON)::LoadImage(NULL,L"tarico.ico",IMAGE_ICON,0,0,LR_DEFAULTSIZE|LR_LOADFROMFILE);
wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName=NULL;
wndclass.lpszClassName=L"sdjzuhero";
//注册窗口
if(!RegisterClassEx(&wndclass))
return-1;
HWNDhwnd=CreateWindow(L"sdjzuhero",TAR_TITLE,WS_OVERLAPPED|WS_CAPTION|WS_SYSMENU|WS_MINIMIZEBOX,CW_USEDEFAULT,CW_USEDEFAULT,TAR_HIGH,TAR_WEIGHT,NULL,NULL,hInstance,NULL);//第三个参数控制了窗口的样式，合集为WS_OVERLAPPEDWINDOW
MoveWindow(hwnd,250,80,TAR_HIGH,TAR_WEIGHT,true);
ShowWindow(hwnd,nShowCmd);
UpdateWindow(hwnd);
//载入报错模块
MSGmsg={0};
while(msg.message!=WM_QUIT)
{
if(PeekMessage(&msg,0,0,0,PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
UnregisterClass(L"sdjzuhero",wndclass.hInstance);
return0;
}
刚开始试了几次没有成功，发现是在WndProc里对函数的调用出错了，没有执行init部分，改成init之后问题解决。看来与ACM一样，不能唯别人的模板是从，还是应该理解后加以修改，以更好的利用。