Windows程序设计 BITBLT.C--STRETCH.C--BRICKS1.C--BRICKS2.C--BRICKS3.C 范例分析笔记

/*---------------------------------------
   BITBLT.C – 利用BITBLT 函数抓取标题栏
                     图标区域到窗口显示区域
 
   STRETCH.C – 利用 StretchBlt 函数抓取窗口
                        标题图标区域到窗口显示区域，
                        并拉伸显示
  ---------------------------------------*/
 
#include <windows.h>
 
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
 
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     static TCHAR szAppName [] = TEXT (" BitBlt ") ;
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASS     wndclass ;
 
     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon ( NULL , IDI_INFORMATION ) ;
     wndclass.hCursor       = LoadCursor ( NULL , IDC_ARROW ) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject ( WHITE_BRUSH ) ;
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;
    
     if (! RegisterClass (&wndclass))
     {
          MessageBox ( NULL , TEXT (" This program requires Windows NT! "),
                      szAppName, MB_ICONERROR ) ;
          return 0 ;
     }
    
     hwnd = CreateWindow (szAppName, TEXT (" BitBlt Demo "),
                           WS_OVERLAPPEDWINDOW ,
                          CW_USEDEFAULT , CW_USEDEFAULT ,
                          CW_USEDEFAULT , CW_USEDEFAULT ,
                          NULL , NULL , hInstance, NULL ) ;
 
     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;
 
     while ( GetMessage (&msg, NULL , 0, 0))
     {
          TranslateMessage (&msg) ;
          DispatchMessage (&msg) ;
     }
     return msg.wParam ;
}
 
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     static int  cxClient, cyClient, cxSource, cySource ;
     HDC         hdcClient, hdcWindow ;
     int         x, y ;
     PAINTSTRUCT ps ;
    
     switch (message)
     {
     case WM_CREATE :
          // 窗口的边框的宽度 + 标题栏按钮的宽度 = 标题栏图标及按钮的宽度
          cxSource = GetSystemMetrics ( SM_CXSIZEFRAME ) +
                     GetSystemMetrics ( SM_CXSIZE ) ;
          // 窗口的边框的高度 + 窗口标题的高度 = 窗口标题栏的高度
          cySource = GetSystemMetrics ( SM_CYSIZEFRAME ) +
                     GetSystemMetrics ( SM_CYCAPTION ) ;
          return 0 ;
 
     case WM_SIZE :
          cxClient = LOWORD (lParam) ;
          cyClient = HIWORD (lParam) ;
          return 0 ;
 
     case WM_PAINT :
          hdcClient = BeginPaint (hwnd, &ps) ; // 取得窗口重绘区域句柄
          hdcWindow = GetWindowDC (hwnd) ; // 取得整个窗口的句柄
 
          for (y = 0 ; y < cyClient ; y += cySource)
          for (x = 0 ; x < cxClient ; x += cxSource)
                //将整个窗口的句柄作为来源，传送到窗口重绘区域。通过循环而达到平铺位图到重绘区域的目的
              BitBlt (hdcClient, x, y, cxSource, cySource, hdcWindow, 0, 0, SRCCOPY ) ;
 
         /* StretchBlt 方法：
            以窗体标题栏图标区域为来源，拉伸显示到窗口重绘区域 */
          StretchBlt (hdcClient, 0, 0, cxClient, cyClient,
                      hdcWindow, 0, 0, cxSource, cySource, MERGECOPY ) ;
 
 
          ReleaseDC (hwnd, hdcWindow) ;
          EndPaint (hwnd, &ps) ;
          return 0 ;
 
     case WM_DESTROY :
          PostQuitMessage (0) ;
          return 0 ;
     }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
}

---

/*----------------------------------------
   BRICKS1.C – LoadBitmap 位图资源的载入使用
  ----------------------------------------*/
 
#include <windows.h>
 
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
 
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     static TCHAR szAppName [] = TEXT (" Bricks1 ") ;
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASS     wndclass ;
 
     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon ( NULL , IDI_APPLICATION ) ;
     wndclass.hCursor       = LoadCursor ( NULL , IDC_ARROW ) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject ( WHITE_BRUSH ) ;
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;
    
     if (! RegisterClass (&wndclass))
     {
          MessageBox ( NULL , TEXT (" This program requires Windows NT! "),
                      szAppName, MB_ICONERROR ) ;
          return 0 ;
     }
    
     hwnd = CreateWindow (szAppName, TEXT (" LoadBitmap Demo "),
                          WS_OVERLAPPEDWINDOW ,
                          CW_USEDEFAULT , CW_USEDEFAULT ,
                          CW_USEDEFAULT , CW_USEDEFAULT ,
                          NULL , NULL , hInstance, NULL ) ;
 
     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;
 
     while ( GetMessage (&msg, NULL , 0, 0))
     {
           TranslateMessage (&msg) ;
          DispatchMessage (&msg) ;
     }
     return msg.wParam ;
}
 
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     static HBITMAP hBitmap ;
     static int     cxClient, cyClient, cxSource, cySource ;
     BITMAP         bitmap ;
     HDC            hdc, hdcMem ;
     HINSTANCE      hInstance ;
     int            x, y ;
     PAINTSTRUCT    ps ;
    
     switch (message)
     {
     case WM_CREATE :
          // 强制转换消息中 lParam 参数为指向 CREATESTRUCT 结构的指针 "LPCREATESTRUCT", 并调取 hInstance 元素
          hInstance = ((LPCREATESTRUCT) lParam)->hInstance ;
 
          hBitmap = LoadBitmap (hInstance, TEXT (" Bricks ")) ; // 载入位图资源进内存 ， 取得句柄
 
          GetObject (hBitmap, sizeof (BITMAP), &bitmap) ; // 取位图资源信息
 
          cxSource = bitmap.bmWidth ;
          cySource = bitmap.bmHeight ;  // 取位图资源的宽高
 
          return 0 ;
 
     case WM_SIZE :
          cxClient = LOWORD (lParam) ;
          cyClient = HIWORD (lParam) ;
          return 0 ;
 
     case WM_PAINT :
          hdc = BeginPaint (hwnd, &ps) ;

          // 建立与视讯显示器兼容的内存设备内容 ， 取得句柄
          hdcMem = CreateCompatibleDC (hdc) ;
          SelectObject (hdcMem, hBitmap) ; // 将资源位图选择进内存设备内容
 
          for (y = 0 ; y < cyClient ; y += cySource)
          for (x = 0 ; x < cxClient ; x += cxSource)
          {
               // 将内存设备内容中的位图 ， 平铺到显示区域
               BitBlt (hdc, x, y, cxSource, cySource, hdcMem, 0, 0, SRCCOPY ) ;
          }
 
          DeleteDC (hdcMem) ; // 释放内存设备内容
          EndPaint (hwnd, &ps) ;
          return 0 ;
 
     case WM_DESTROY :
          DeleteObject (hBitmap) ; //释放载入的位图资源
          PostQuitMessage (0) ;
          return 0 ;
     }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
}

---

/*-----------------------------------------
   BRICKS2.C – 利用CreateBitmap 函数建立单色 
                        8*8 位图，并平铺到显示区域
  -----------------------------------------*/
 
#include <windows.h>
 
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
 
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     static TCHAR szAppName [] = TEXT (" Bricks2 ") ;
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASS     wndclass ;
 
     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon ( NULL , IDI_APPLICATION ) ;
     wndclass.hCursor       = LoadCursor ( NULL , IDC_ARROW ) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject ( WHITE_BRUSH ) ;
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;
    
     if (! RegisterClass (&wndclass))
     {
          MessageBox ( NULL , TEXT (" This program requires Windows NT! "),
                      szAppName, MB_ICONERROR ) ;
          return 0 ;
     }
    
     hwnd = CreateWindow (szAppName, TEXT (" CreateBitmap Demo "),
                          WS_OVERLAPPEDWINDOW ,
                          CW_USEDEFAULT , CW_USEDEFAULT ,
                           CW_USEDEFAULT , CW_USEDEFAULT ,
                          NULL , NULL , hInstance, NULL ) ;
 
     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;
 
     while ( GetMessage (&msg, NULL , 0, 0))
     {
          TranslateMessage (&msg) ;
           DispatchMessage (&msg) ;
     }
     return msg.wParam ;
}
 
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     //初始化位图结构信息，大小8*8，每行占2字节，1颜色位面，每像素占1位
     static BITMAP  bitmap = { 0, 8, 8, 2, 1, 1 } ;
     //初始化位图数据，0为黑色，1为白色
     static BYTE    bits [8][2] = { 0xFF, 0, 0x0C, 0, 0x0C, 0, 0x0C, 0,
                                    0xFF, 0, 0xC0, 0, 0xC0, 0, 0xC0, 0 } ;
     static HBITMAP hBitmap ;
     static int     cxClient, cyClient, cxSource, cySource ;
     HDC            hdc, hdcMem ;
     int            x, y ;
     PAINTSTRUCT    ps ;
    
     switch (message)
     {
     case WM_CREATE :
          bitmap.bmBits = bits ; // 设定建立位图时所用数据数组指针
          hBitmap = CreateBitmapIndirect (&bitmap) ; // 用bitmap 结构中的信息建立位图
          cxSource = bitmap.bmWidth ;
          cySource = bitmap.bmHeight ;  // 取位图的宽和高
          return 0 ;
 
     case WM_SIZE :
          cxClient = LOWORD (lParam) ;
          cyClient = HIWORD (lParam) ;
          return 0 ;
 
     case WM_PAINT :
          hdc = BeginPaint (hwnd, &ps) ;
 
          hdcMem = CreateCompatibleDC (hdc) ; // 建立与视讯显示器兼容的内存设备内容
          SelectObject (hdcMem, hBitmap) ;  // 将位图选进内存设备内容
 
          for (y = 0 ; y < cyClient ; y += cySource)
          for (x = 0 ; x < cxClient ; x += cxSource)
          {
               // 以内存设备内容为来源，平铺显示位图到显示区域
               BitBlt (hdc, x, y, cxSource, cySource, hdcMem, 0, 0, SRCCOPY ) ;
          }
 
          DeleteDC (hdcMem) ; // 删除内存设备内容
          EndPaint (hwnd, &ps) ;
          return 0 ;
 
     case WM_DESTROY :
          DeleteObject (hBitmap) ; // 删除建立的位图
          PostQuitMessage (0) ;
          return 0 ;
     }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
}

---

/*-----------------------------------------------
   BRICKS3.C – 利用CreatePatternBrush 函数，建立
                        位图刷子，刷新窗体背景
  -----------------------------------------------*/
 
#include <windows.h>
 
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
 
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     static TCHAR szAppName [] = TEXT (" Bricks3 ") ;
     HBITMAP      hBitmap ;
     HBRUSH       hBrush ;
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASS     wndclass ;
 
     hBitmap = LoadBitmap (hInstance, TEXT (" Bricks ")) ; // 载入位图资源进内存
     hBrush = CreatePatternBrush (hBitmap) ; // 以内存中位图来建立刷子 ， 用于刷新窗体背景
     DeleteObject (hBitmap) ; // 释放位图资源
 
     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon ( NULL , IDI_APPLICATION ) ;
     wndclass.hCursor       = LoadCursor ( NULL , IDC_ARROW ) ;
     wndclass.hbrBackground = hBrush ;  //位图刷子句柄
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;
    
     if (! RegisterClass (&wndclass))
     {
          MessageBox ( NULL , TEXT (" This program requires Windows NT! "),
                      szAppName, MB_ICONERROR ) ;
          return 0 ;
     }
    
     hwnd = CreateWindow (szAppName, TEXT (" CreatePatternBrush Demo "),
                          WS_OVERLAPPEDWINDOW ,
                           CW_USEDEFAULT , CW_USEDEFAULT ,
                          CW_USEDEFAULT , CW_USEDEFAULT ,
                          NULL , NULL , hInstance, NULL ) ;
 
     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;
 
     while ( GetMessage (&msg, NULL , 0, 0))
     {
          TranslateMessage (&msg) ;
          DispatchMessage (&msg) ;
     }
 
     DeleteObject (hBrush) ; // 删除位图刷子
     return msg.wParam ;
}
 
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     switch (message)
     {
     case WM_DESTROY :
          PostQuitMessage (0) ;
          return 0 ;
     }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
}