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BEGIN_MESSAGE_MAP(CGdiexampleDlg, CDialog)
//{{AFX_MSG_MAP(CGdiexampleDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_COMMAND(IDM_GDI_DRAW_LINE, OnGdiDrawLine)
ON_COMMAND(IDM_GDIP_DRAW_LINE, OnGdipDrawLine)
ON_COMMAND(IDM_Gradient_Brush, OnGradientBrush)
ON_COMMAND(IDM_Cardinal_Spline, OnCardinalSpline)
ON_COMMAND(IDM_Transformation_Matrix, OnTransformationMatrix)
ON_COMMAND(IDM_Scalable_Region, OnScalableRegion)
ON_COMMAND(IDM_IMAGE, OnImage)
ON_COMMAND(IDM_Alpha_Blend, OnAlphaBlend)
ON_COMMAND(IDM_TEXT, OnText)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

void CGdiexampleDlg::OnGdiDrawLine()
{
// TODO: Add your command handler code here
CClientDC dc(this);
//邏輯坐標與設備坐標變換
CRect rect;
GetClientRect(&rect);
dc.SetMapMode(MM_ANISOTROPIC);
dc.SetWindowOrg(0, 0);
dc.SetWindowExt(rect.right, rect.bottom);
dc.SetViewportOrg(0, rect.bottom / 2);
dc.SetViewportExt(rect.right, - rect.bottom);
//創(chuàng )建繪制正旋曲線(xiàn)的pen并將其選入設備上下文
CPen pen(PS_SOLID, 1, RGB(255, 0, 0));
HGDIOBJ oldObject = dc.SelectObject(pen.GetSafeHandle());
//繪制正旋曲線(xiàn)
dc.MoveTo(0, 0);
for (int i = 0; i < rect.right; i++)
{
dc.LineTo(i, 100 *sin(2 *(i / (rect.right / 5.0)) *PI));
}
//創(chuàng )建繪制x軸的pen并將其選入設備上下文
CPen penx(PS_SOLID, 1, RGB(0, 0, 255));
dc.SelectObject(penx.GetSafeHandle());
//繪制X軸
dc.MoveTo(0, 0);
dc.LineTo(rect.right, 0);
//恢復原先的pen
dc.SelectObject(oldObject);
}

dc.SetMapMode(MM_TEXT);

void CGdiexampleDlg::OnGdipDrawLine()
{
// TODO: Add your command handler code here
CClientDC dc(this);
//邏輯坐標與設備坐標變換
CRect rect;
GetClientRect(&rect);
dc.SetMapMode(MM_ANISOTROPIC);
dc.SetWindowOrg(0, 0);
dc.SetWindowExt(rect.right, rect.bottom);
dc.SetViewportOrg(0, rect.bottom / 2);
dc.SetViewportExt(rect.right, - rect.bottom);

//創(chuàng )建Graphics對象
Graphics graphics(dc);
//創(chuàng )建pen
Pen myPen(Color::Red);
myPen.SetWidth(1);
//畫(huà)正旋曲線(xiàn)
for (int i = 0; i < rect.right; i++)
{
graphics.DrawLine(&myPen, i, 100 *sin(2 *(i / (rect.right / 5.0)) *PI), i+1, 100 *sin(2 *((i + 1)/(rect.right / 5.0)) *PI));
}
//畫(huà)X軸
myPen.SetColor(Color::Blue);
graphics.DrawLine(&myPen, 0, 0, rect.right, 0);
}

#define UNICODE
#ifndef ULONG_PTR
#define ULONG_PTR unsigned long*
#endif
#include "c:\gdiplus\includes\gdiplus.h"
using namespace Gdiplus;
#pragma comment(lib, "c:\\gdiplus\\lib\\gdiplus.lib")

/////////////////////////////////////////////////////////////////////////////
// CGdiexampleApp initialization

BOOL CGdiexampleApp::InitInstance()
{
AfxEnableControlContainer();

// Standard initialization

#ifdef _AFXDLL
Enable3dControls(); // Call this when using MFC in a shared DLL
#else
Enable3dControlsStatic(); // Call this when linking to MFC statically
#endif

//初始化gdiplus的環(huán)境
GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
// 初始化GDI+.
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

CGdiexampleDlg dlg;
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();
if (nResponse == IDOK){}
else if (nResponse == IDCANCEL){}

//關(guān)閉gdiplus的環(huán)境
GdiplusShutdown(gdiplusToken);

return FALSE;
}

void CGdiexampleDlg::OnGradientBrush()
{
// TODO: Add your command handler code here
CClientDC dc(this);
CRect rect;
GetClientRect(&rect);
//創(chuàng )建Graphics對象
Graphics graphics(dc);
//創(chuàng )建漸變畫(huà)刷
LinearGradientBrush lgb(Point(0, 0), Point(rect.right, rect.bottom), Color::Blue, Color::Green);
//填充
graphics.FillRectangle(&lgb, 0, 0, rect.right, rect.bottom);
}

void CGdiexampleDlg::OnCardinalSpline()
{
// TODO: Add your command handler code here
CClientDC dc(this);
//創(chuàng )建Graphics對象
Graphics graphics(dc);
Point points[] =

{
Point(0, 0), Point(100, 200), Point(200, 0), Point(300, 200), Point(400, 0)
};
//直接畫(huà)線(xiàn)
for (int i = 0; i < 4; i++)
{
graphics.DrawLine(&Pen(Color::Blue, 3), points[i], points[i + 1]);
}
//利用基數樣條畫(huà)線(xiàn)
graphics.DrawCurve(&Pen(Color::Red, 3), points, 5);
}

void CGdiexampleDlg::OnTransformationMatrix()
{
// TODO: Add your command handler code here
CClientDC dc(this);
//創(chuàng )建Graphics對象
Graphics graphics(dc);
GraphicsPath path;
path.AddRectangle(Rect(250, 20, 70, 70));
graphics.DrawPath(&Pen(Color::Black, 1), &path); // 在應用變形矩陣之前繪制矩形
// 路徑變形
Matrix matrix1, matrix2;

matrix1.Rotate(45.0f); //旋轉順時(shí)針45度
path.Transform(&matrix1); //應用變形
graphics.DrawPath(&Pen(Color::Red, 3), &path);

matrix2.Scale(1.0f, 0.5f); //轉化成為平行四邊形法則
path.Transform(&matrix2); //應用變形
graphics.DrawPath(&Pen(Color::Blue, 3), &path);
}

void CGdiexampleDlg::OnScalableRegion()
{
// TODO: Add your command handler code here
CClientDC dc(this);
//創(chuàng )建Graphics對象
Graphics graphics(dc);
//創(chuàng )建GraphicsPath
GraphicsPath path;
path.AddLine(100, 100, 150, 150);
path.AddLine(50, 150, 150, 150);
path.AddLine(50, 150, 100, 100);
//創(chuàng )建Region
Region region(&path);
//填充區域
graphics.FillRegion(&SolidBrush(Color::Blue), &region);
//區域變形
Matrix matrix;
matrix.Rotate(10.0f); //旋轉順時(shí)針20度
matrix.Scale(1.0f, 0.3f); //拉伸
region.Transform(&matrix); //應用變形
//填充變形后的區域
graphics.FillRegion(&SolidBrush(Color::Green), &region);
}

void CGdiexampleDlg::OnImage()
{
// TODO: Add your command handler code here
CClientDC dc(this);
//創(chuàng )建Graphics對象
Graphics graphics(dc);
Image image(L "d:\\1.jpg");
//在矩形區域內顯示jpg圖像
Point destPoints1[3] =
{
Point(10, 10), Point(220, 10), Point(10, 290)
};
graphics.DrawImage(&image, destPoints1, 3);
//在平行四邊形區域內顯示jpg圖像
Point destPoints2[3] =
{
Point(230, 10), Point(440, 10), Point(270, 290)
};
graphics.DrawImage(&image, destPoints2, 3);
}

void CGdiexampleDlg::OnAlphaBlend()
{
// TODO: Add your command handler code here
CClientDC dc(this);
//創(chuàng )建Graphics對象
Graphics graphics(dc);
//創(chuàng )建ColorMatrix
ColorMatrix ClrMatrix =
{
1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f, 0.5f, 0.0f,
0.0f, 0.0f, 0.0f, 0.0f, 1.0f
};
//將ColorMatrix賦給ImageAttributes
ImageAttributes ImgAttr;
ImgAttr.SetColorMatrix(&ClrMatrix, ColorMatrixFlagsDefault,ColorAdjustTypeBitmap);
//在矩形區域內顯示jpg圖像
Image img1(L "d:\\1.jpg");
Point destPoints1[3] =
{
Point(10, 10), Point(220, 10), Point(10, 290)
};
graphics.DrawImage(&img1, destPoints1, 3);
//Alpha混合
Image img2(L "d:\\2.jpg");
int width, height;
width = img2.GetWidth();
height = img2.GetHeight();
graphics.DrawImage(&img2, RectF(10, 10, 210, 280), 0, 0, width, height,UnitPixel, &ImgAttr);
//在平行四邊形區域內顯示jpg圖像
Point destPoints2[3] =
{
Point(230, 10), Point(440, 10), Point(270, 290)
};
graphics.DrawImage(&img1, destPoints2, 3);
//Alpha混合
graphics.DrawImage(&img2, destPoints2, 3, 0, 0, width, height, UnitPixel,&ImgAttr);
}

void CGdiexampleDlg::OnText()
{
// TODO: Add your command handler code here
CClientDC dc(this);
//創(chuàng )建Graphics對象
Graphics graphics(dc);
//創(chuàng )建20號"楷體"字體
FontFamily fontFamily1(L"華文行楷"); // 定義"楷體"字樣
Font font1(&fontFamily1, 20, FontStyleRegular, UnitPoint);
//定義輸出UNICODE字符串
WCHAR string[256];
wcscpy(string, L"天極網(wǎng)的讀者朋友，您好！");
//以藍色畫(huà)刷和20號"楷體"顯示字符串
graphics.DrawString(string, (INT)wcslen(string), &font1, PointF(30, 10),&SolidBrush(Color::Blue));
//定義字符串顯示畫(huà)刷
LinearGradientBrush linGrBrush(Point(30, 50), Point(100, 50), Color(255, 255,0, 0), Color(255, 0, 0, 255));
//以線(xiàn)性漸變畫(huà)刷和創(chuàng )建的20號"楷體"顯示字符串
graphics.DrawString(string, (INT)wcslen(string), &font1, PointF(30, 50),&linGrBrush);
//創(chuàng )建20號"華文行楷"字體
FontFamily fontFamily2(L"華文行楷"); // 定義"楷體"字樣
Font font2(&fontFamily2, 20, FontStyleRegular, UnitPoint);
//以線(xiàn)性漸變畫(huà)刷和20號"華文行楷"顯示字符串
graphics.DrawString(string, (INT)wcslen(string), &font2, PointF(30, 90),&linGrBrush);
//以圖像創(chuàng )建畫(huà)刷
Image image(L"d:\\3.jpg");
TextureBrush tBrush(&image);
//以圖像畫(huà)刷和20號"華文行楷"顯示字符串
graphics.DrawString(string, (INT)wcslen(string), &font2, PointF(30, 130),&tBrush);
//創(chuàng )建25號"華文中宋"字體
FontFamily fontFamily3(L"華文中宋"); // 定義"楷體"字樣
Font font3(&fontFamily2, 25, FontStyleRegular, UnitPoint);
//以圖像畫(huà)刷和20號"華文行楷"顯示字符串
graphics.DrawString(string, (INT)wcslen(string), &font3, PointF(30, 170),&tBrush);
}

//創(chuàng )建繪制正旋曲線(xiàn)的pen并將其選入設備上下文
CPen pen(PS_SOLID,1,RGB(255,0,0));
HGDIOBJ oldObject = dc.SelectObject(pen.GetSafeHandle());
…
//創(chuàng )建繪制x軸的pen并將其選入設備上下文
CPen penx(PS_SOLID,1,RGB(0,0,255));
dc.SelectObject(penx.GetSafeHandle());
…
//恢復原先的pen
dc.SelectObject(oldObject);

Pen myPen(Color::Red);
myPen.SetWidth(1);
…
graphics.DrawLine(&myPen,i,100*sin(2*(i/(rect.right/5.0))*PI),
i+1,100*sin(2*((i+1)/(rect.right/5.0))*PI));
…
graphics.DrawLine(&myPen,0,0,rect.right,0);

//繪制正旋曲線(xiàn)
dc.MoveTo(0,0) ;
for(int i=0;i<rect.right;i++)
{
dc.LineTo(i,100*sin(2*(i/(rect.right/5.0))*PI));
}

graphics.DrawLine(&myPen,0,0,rect.right,0);