更新时间:2015-12-16 20:43:33浏览次数:1+次
在QQ聊天窗口中,我们发送了图片后,然后选择图片后,图片就出现下面这样的效果:
下面是QQ聊天文字选择后的效果,原始的颜色是黑色,选择后为白色字:
下面是窗口原始图的效果:
窗口中反色处理后的效果:
其实我们最常见的是文字选择后的反色,各种可以打字的地方,选择文字后都反色处理了。只不过,系统默认的反色并不是绝对的反色,而是将选择文字的设置了一个较深的颜色罢了。而对于文字字体上,则由黑色变成了白色。
case WM_LBUTTONDOWN:
hdc = GetDC(hwnd);
for (int i=0;i<pt.x;i++)
{
for (int j=0;j<pt.y;j++)
{
COLORREF clr = GetPixel(hdc,i,j);
int red = GetRValue(clr);
int green = GetGValue(clr);
int blue = GetBValue(clr);
SetPixel(hdc,i,j,RGB(255-red,255-green,255-blue));
}
}
ReleaseDC(hwnd,hdc);
return 0;
那么对于反色效率问题,我将在后续的文章来分析,提高效率。
以下是本程序的完整代码:
#include "windows.h"
#include "resource.h"
#include <tchar.h>
// - 项目是Unicode字符集
HINSTANCE g_hInstance=NULL;
LRESULT CALLBACK WinProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hdc,hMem;
PAINTSTRUCT ps;
TCHAR Info[100]=_T("美女哦 - 【C++技术网http://www.cjjjs.com】");
HBITMAP hBitmap;
static POINT pt;
switch (message)
{
case WM_PAINT:
hdc = BeginPaint(hwnd,&ps);
hBitmap = LoadBitmap(g_hInstance,MAKEINTRESOURCE(IDB_BITMAP1));
hMem = CreateCompatibleDC(hdc);
SelectObject(hMem,hBitmap);
TextOut(hMem,0,100,Info,lstrlen(Info));
BitBlt(hdc,0,0,pt.x,pt.y,hMem,0,0,SRCCOPY);
EndPaint(hwnd,&ps);
return 0;
case WM_LBUTTONDOWN:
hdc = GetDC(hwnd);
for (int i=0;i<pt.x;i++)
{
for (int j=0;j<pt.y;j++)
{
COLORREF clr = GetPixel(hdc,i,j);
int red = GetRValue(clr);
int green = GetGValue(clr);
int blue = GetBValue(clr);
SetPixel(hdc,i,j,RGB(255-red,255-green,255-blue));
}
}
ReleaseDC(hwnd,hdc);
return 0;
case WM_SIZE:
pt.x = LOWORD(lParam);//存储客户区宽度
pt.y = HIWORD(lParam);//存储客户区高度
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
}
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrev,LPSTR lpCmd,int iShow)
{
TCHAR ClassName[] = _T("MyClass");
TCHAR title1[] = _T("C++技术网http://www.cjjjs.com");
WNDCLASS wndClass;
wndClass.cbClsExtra=0;
wndClass.cbWndExtra=0;
wndClass.hbrBackground= (HBRUSH)GetStockObject(BLACK_BRUSH);
wndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
wndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndClass.hInstance = hInstance;
wndClass.lpfnWndProc = WinProc;
wndClass.lpszClassName = ClassName;
wndClass.lpszMenuName=NULL;
wndClass.style=CS_HREDRAW|CS_VREDRAW;
if(!RegisterClass(&wndClass))
{
return 0;
}
g_hInstance = hInstance;
HWND hwnd = CreateWindow(ClassName,title1,WS_OVERLAPPEDWINDOW,0,0,440,440,NULL,NULL,hInstance,NULL);
ShowWindow(hwnd,SW_SHOWNORMAL);
MSG msg;
while (GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
相关资讯