2013年8月27日星期一（DEMO7-19窗口的裁剪等）

OK，现在马不停蹄，结束这个第7章，拖延的时间真长，有6个月了，汗。。。

这个是上次的应用，加上逻辑判断如何画点，并用GetWindowRect（）是客户区，实际上这不对，应该是GetClientRect(),果然不对，只能是说把图画上了。

 

代码如下

     DDSURFACEDESC2     ddsd;

     RECT          client;

     GetWindowRect( main_window_handle, & client );

     DDRAW_INIT_STRUCT( ddsd );

     lpddsprimary->Lock( NULL, & ddsd, DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT, NULL );

     UCHAR         *    primary_buffer         = ( UCHAR * ) ddsd.lpSurface;

     if( pixel_format == 32 )

     {

         for( int index = 0; index < 10; index ++ )

         {

              int      x                  = rand() % ( client.right - client.left ) + client.left;

              int      y                  = rand() % ( client.bottom - client.top ) + client.top;

              DWORD    color              = _RGB32BIT( 0, rand() % 256, rand() % 256, rand() % 256 );

              * ( ( DWORD * ) ( primary_buffer + x * 4 + y * ddsd.lPitch ) ) = color;

         }

     }

     else

     if( pixel_format == 24 )

     {

         for( int index = 0; index < 10; index ++ )

         {

              int      x                  = rand() % ( client.right - client.left ) + client.left;

              int      y                  = rand() % ( client.bottom - client.top ) + client.top;

        

              ( ( primary_buffer + x * 3 + y * ddsd.lPitch ) )[0] =  rand() % 256 ;

              ( ( primary_buffer + x * 3 + y * ddsd.lPitch ) )[1] =  rand() % 256 ;

              ( ( primary_buffer + x * 3 + y * ddsd.lPitch ) )[2] =  rand() % 256 ;

         }

     }

     else

     if( pixel_format == 16 )

     {

         for( int index = 0; index < 10; index ++ )

         {

              int      x                  = rand() % ( client.right - client.left ) + client.left;

              int      y                  = rand() % ( client.bottom - client.top ) + client.top;

              USHORT   color              = _RGB32BIT( 0, rand() % 256, rand() % 256, rand() % 256 );

              * ( ( USHORT * ) ( primary_buffer + x * 4 + y * ddsd.lPitch ) ) = color;

         }

     }

     else

     {

         for( int index = 0; index < 10; index ++ )

         {

              int      x                  = rand() % ( client.right - client.left ) + client.left;

              int      y                  = rand() % ( client.bottom - client.top ) + client.top;

              UCHAR    color              =  rand() % 256;

              primary_buffer[x  + y * ddsd.lPitch] = color;

         }

     }

     lpddsprimary->Unlock( NULL );

     Sleep( 1 );

 

 

结果如下图所示

但是当封装后，

 

     DDSURFACEDESC2     ddsd;

     RECT          client;

     GetWindowRect( main_window_handle, & client );

     DDRAW_INIT_STRUCT( ddsd );

     ddraw->getPrimarySurface()->Lock( NULL, & ddsd, DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT, NULL );

     UCHAR         *    primary_buffer         = ( UCHAR * ) ddsd.lpSurface;

     if( ddraw->getPixelFormat() == 32 )

     {

         for( int index = 0; index < 10; index ++ )

         {

              int      x                  = rand() % ( client.right - client.left ) + client.left;

              int      y                  = rand() % ( client.bottom - client.top ) + client.top;

              DWORD    color              = _RGB32BIT( 0, rand() % 256, rand() % 256, rand() % 256 );

              * ( ( DWORD * ) ( primary_buffer + x * 4 + y * ddsd.lPitch ) ) = color;

         }

     }

     else

     if( ddraw->getPixelFormat() == 24 )

     {

         for( int index = 0; index < 10; index ++ )

         {

              int      x                  = rand() % ( client.right - client.left ) + client.left;

              int      y                  = rand() % ( client.bottom - client.top ) + client.top;

        

              ( ( primary_buffer + x * 3 + y * ddsd.lPitch ) )[0] =  rand() % 256 ;

              ( ( primary_buffer + x * 3 + y * ddsd.lPitch ) )[1] =  rand() % 256 ;

              ( ( primary_buffer + x * 3 + y * ddsd.lPitch ) )[2] =  rand() % 256 ;

         }

     }

     else

     if( ddraw->getPixelFormat() == 16 )

     {

         for( int index = 0; index < 10; index ++ )

         {

              int      x                  = rand() % ( client.right - client.left ) + client.left;

              int      y                  = rand() % ( client.bottom - client.top ) + client.top;

              USHORT   color              = _RGB32BIT( 0, rand() % 256, rand() % 256, rand() % 256 );

              * ( ( USHORT * ) ( primary_buffer + x * 4 + y * ddsd.lPitch ) ) = color;

         }

     }

     else

     {

         for( int index = 0; index < 10; index ++ )

         {

              int      x                  = rand() % ( client.right - client.left ) + client.left;

              int      y                  = rand() % ( client.bottom - client.top ) + client.top;

              UCHAR    color              =  rand() % 256;

              primary_buffer[x  + y * ddsd.lPitch] = color;

         }

     }

     ddraw->getPrimarySurface()->Unlock( NULL );

     Sleep( 1 );

 

 

8位模式时却不对，只占了左侧一部分。

 

但是改为全屏，却是可以的，邪门了

 

接下来，就是查找实际的客户区，或许与这个有关系。

这里在T3DCONSOLE2中的main（）函数里面了。

加上以下代码后，窗口根本显示不出来了，废了，

     if( WINDOWED_APP )

     {

         RECT window_rect                      = { 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT};

         AdjustWindowRectEx( & window_rect, GetWindowStyle( main_window_handle ), GetMenu( main_window_handle ) != NULL,

              GetWindowExStyle( main_window_handle ) );

 

//       window_client_x0                     = -window_rect.left;

//       window_client_y0                     = -window_rect.top;

 

         MoveWindow( main_window_handle, CW_USEDEFAULT, CW_USEDEFAULT, window_rect.right - window_rect.left,

              window_rect.bottom - window_rect.top, TRUE );

 

         ShowWindow( main_window_handle, SW_SHOW );

     }

 

加了个窗口的裁剪器 LPDIRECTDRAWCLIPPER              m_lpddclipperwin;

 

     if( m_bWindowed == true )

     {

         m_lpdd->CreateClipper( 0, & m_lpddclipperwin, NULL );

         m_lpddclipperwin->SetHWnd( 0, m_hWnd );

         m_lpddsprimary->SetClipper( m_lpddclipperwin );

 

     }

终于OK了，因为书上的代码不对，而光盘上的代码才是正确的

 

正确代码如下：

 

// resize the window so that client is really width x height

if (WINDOWED_APP)

{

// now resize the window, so the client area is the actual size requested

// since there may be borders and controls if this is going to be a windowed app

// if the app is not windowed then it won't matter

RECT window_rect = {0,0,WINDOW_WIDTH-1,WINDOW_HEIGHT-1};

 

 

// make the call to adjust window_rect

AdjustWindowRectEx(&window_rect,

     GetWindowStyle(main_window_handle),

     GetMenu(main_window_handle) != NULL,

     GetWindowExStyle(main_window_handle));

 

// save the global client offsets, they are needed in DDraw_Flip()

window_client_x0 = -window_rect.left;

window_client_y0 = -window_rect.top;

 

// now resize the window with a call to MoveWindow()

MoveWindow(main_window_handle,

           0, // x position

           0, // y position

           window_rect.right - window_rect.left, // width

           window_rect.bottom - window_rect.top, // height

           FALSE);

 

// show the window, so there's no garbage on first render

ShowWindow(main_window_handle, SW_SHOW);

} // end if windowed

 

不禁感慨，窗口确实要小心测试。