GDI+

#include <comdef.h>
#include <Windows.h>

#include "GDIPlusB.h"
#include <gdiplus.h> 
using namespace Gdiplus; 
#pragma comment(lib,"gdiplus.lib")

void CGDIPlusB::InitInstance()
{
　　//GDI+的初始化
    Gdiplus::GdiplusStartupInput gdiplusStartupInput; 
    Gdiplus::GdiplusStartup(&m_gdiplusToken , &gdiplusStartupInput, NULL); 
}

void CGDIPlusB::UnInstance()
{
　　//关闭GDI+
    Gdiplus::GdiplusShutdown(m_gdiplusToken);
}

void CGDIPlusB::DrawAlphaPen( HDC* phdc  ) 
{
    COLORREF    crBackClr = RGB( 0,0,255);
    COLORREF    crDark = RGB( 0 , 255 , 0 );
    COLORREF    crBright = RGB( 255,255,255);   
    Color   GdiClrD,GdiClrB;//用于产生渐变效果;
    GdiClrD.SetFromCOLORREF(crDark);   
    GdiClrB.SetFromCOLORREF(crBright);   

    int   r,g,b,r1,g1,b1;//分别得到明色和暗色的R   G   B值   
    r   =   GdiClrD.GetRed();   
    g   =   GdiClrD.GetGreen();   
    b   =   GdiClrD.GetBlue();   

    r1   =   GdiClrB.GetRed();   
    g1   =   GdiClrB.GetGreen();   
    b1   =   GdiClrB.GetBlue();   

    int   alpha   =  220 ;

    //产生渐变的透明画刷   
    Color   GdiClrDark(alpha,r,g,b) ;   
    Color   GdiClrBright(alpha,r1,g1,b1) ;   

    Gdiplus::Point pt_begin , pt_end ;
    SetRect( &m_rc , 200 ,200 , 200+260 , 200+149 ) ;
    pt_begin.X = m_rc.left ;
    pt_begin.Y = m_rc.top ;

    pt_end.X = m_rc.right ;
    pt_end.Y = m_rc.bottom ;

    LinearGradientBrush linGrBrush( pt_begin , pt_end , GdiClrDark,GdiClrBright );
    Pen   pen0(&linGrBrush,16 );   

    Graphics graphics( *phdc );
    graphics.DrawLine( &pen0 , pt_begin , pt_end ) ;
    graphics.ReleaseHDC( *phdc ) ;

}
void CGDIPlusB::DrawImage( HDC* phdc  ) 
{
    TCHAR img[MAX_PATH];
    _stprintf( img,_T("E:\\liuhanGit\\liuhan_memUI\\memUI\\memUI_SKIN\\p6.png")) ;
    Image image( img ); 
    Graphics graphics( *phdc );
    graphics.DrawImage( &image, 200,  400 );
    graphics.ReleaseHDC( *phdc ) ;

}
void CGDIPlusB::DrawGradientBrush( HDC* phdc ) 
{
    COLORREF    crBackClr = RGB( 0,0,255);
    COLORREF    crDark = RGB( 0 , 255 , 0 );
    COLORREF    crBright = RGB( 255,255,255);   
    Color   GdiClrD,GdiClrB;//用于产生渐变效果;
    GdiClrD.SetFromCOLORREF(crDark);   
    GdiClrB.SetFromCOLORREF(crBright);   

    int   r,g,b,r1,g1,b1;//分别得到明色和暗色的R   G   B值   
    r   =   GdiClrD.GetRed();   
    g   =   GdiClrD.GetGreen();   
    b   =   GdiClrD.GetBlue();   

    r1   =   GdiClrB.GetRed();   
    g1   =   GdiClrB.GetGreen();   
    b1   =   GdiClrB.GetBlue();   

    int   alpha   =  220 ;

    //产生渐变的透明画刷   
    Color   GdiClrDark(alpha,r,g,b) ;   
    Color   GdiClrBright(alpha,r1,g1,b1) ;   

    Gdiplus::Point pt_begin , pt_end ;
    SetRect( &m_rc , 500 ,200 , 500+260 , 200+149 ) ;
    pt_begin.X = m_rc.left ;
    pt_begin.Y = m_rc.top ;

    pt_end.X = m_rc.right ;
    pt_end.Y = m_rc.bottom ;

    Brush* bsh0 = new LinearGradientBrush(  pt_begin , pt_end , GdiClrDark,GdiClrBright  )  ;
    Graphics graphics( *phdc );
    graphics.FillRectangle( bsh0 , m_rc.left , m_rc.top  , m_rc.right - m_rc.left ,  m_rc.bottom - m_rc.top ) ; 
    delete bsh0 ;
    graphics.ReleaseHDC( *phdc ) ;
}

void CGDIPlusB::DrawGradientBrush2( HDC* phdc ) 
{
    Gdiplus::Point pt_begin , pt_end ;
    SetRect( &m_rc , 500 ,400 , 500+260 , 400+149 ) ;
    pt_begin.X = m_rc.left ;
    pt_begin.Y = m_rc.top ;

    pt_end.X = m_rc.right ;
    pt_end.Y = m_rc.bottom ;

    LinearGradientBrush linGrBrush( pt_begin , pt_end  ,Color(255,255,0,0),Color(255,0,0,255));  
     Color colors[] = {  
         Color(255, 255, 0, 0),   // red  
         Color(255, 255, 255, 0), //yellow  
         Color(255, 0, 0, 255),   // blue  
         Color(255, 0, 255, 0)};  // green  
         REAL positions[] = {  
             0.0f,     
             0.33f,     
             0.66f,  
             1.0f};    
    linGrBrush.SetInterpolationColors(colors, positions,4);  

    Graphics graphics( *phdc );
    graphics.FillRectangle( &linGrBrush , m_rc.left , m_rc.top  , m_rc.right - m_rc.left ,  m_rc.bottom - m_rc.top ) ; 
    graphics.ReleaseHDC( *phdc ) ;
}