源码分享 GDIPlus绘制旋转七彩动画

[邓学彬]

实现方法：
使用GDIPlus，FillPie方法，把各个色块当饼形图画出。

void CRotateAnimation::DrawPie(HDC hDC)
{
	Gdiplus::Graphics* pGraphics=new Gdiplus::Graphics(hDC);
	pGraphics->SetSmoothingMode(SmoothingModeHighQuality);
	Gdiplus::Color clr(150,0,0,0);
	Gdiplus::SolidBrush* pBrush=new Gdiplus::SolidBrush(clr);
	//--------------------------------------------------------
	//计算外圈、内圈位置
	Gdiplus::Rect rcOut(m_Rect);
	Gdiplus::Rect rcIn(rcOut);
	rcIn.Inflate(-m_ItemSize,-m_ItemSize);
	//--------------------------------------------------------
	//先画出外圈小方块
	float fStartAngle = -90;//起始绘制角度
	float fSweepAngle = 360 / m_AnimationCount;//每小块的角度
	for(int i=0;i<m_AnimationCount;i++)
	{
		clr.SetFromCOLORREF(m_pAnimationArray[i].clrOut);
		pBrush->SetColor(clr);
		pGraphics->FillPie(pBrush,rcOut, fStartAngle, fSweepAngle - m_MarginAngle);
		fStartAngle = fStartAngle + fSweepAngle;
	}
	//--------------------------------------------------------
	//画出内圈小方块;
	fStartAngle = -90;
	for(int i=0;i<m_AnimationCount;i++)
	{
		clr.SetFromCOLORREF(m_pAnimationArray[i].clrIn);
		pBrush->SetColor(clr);
		pGraphics->FillPie(pBrush,rcIn, fStartAngle, fSweepAngle - m_MarginAngle);
		fStartAngle = fStartAngle + fSweepAngle;
	}
	//--------------------------------------------------------
	//画出中间圆心，用控件底色填充
	rcIn.Inflate(-m_ItemSize,-m_ItemSize);
	clr.SetFromCOLORREF(m_ColorBack);
	pBrush->SetColor(clr);
	pGraphics->FillEllipse(pBrush,rcIn);
	//--------------------------------------------------------
	delete pBrush;
	delete pGraphics;
}

源码下载
http://blog.csdn.net/cometnet/article/details/53363596

[hurryboylqs]

支持，精神可嘉

[三岁、就很帅]

Mark 好人

[阿源是少年]

支持开源！！！

[赵4老师]

一起开源：

#include <math.h>
#include <string.h>
#include <stdio.h>
#include <windows.h>
#include <gdiplus.h>
#pragma comment(lib, "gdiplus.lib")
using namespace Gdiplus;
wchar_t formats[5][11]={
    L"image/bmp",
    L"image/jpeg",
    L"image/gif",
    L"image/tiff",
    L"image/png",
};
wchar_t exts[5][5]={
    L".bmp",
    L".jpg",
    L".gif",
    L".tif",
    L".png",
};
int GetEncoderClsid(const WCHAR* format, CLSID* pClsid) {
   UINT  num = 0;          // number of image encoders
   UINT  size = 0;         // size of the image encoder array in bytes
   ImageCodecInfo* pImageCodecInfo = NULL;
   GetImageEncodersSize(&num, &size);
   if(size == 0) return -1;  // Failure
   pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
   if(pImageCodecInfo == NULL) return -1;  // Failure
   GetImageEncoders(num, size, pImageCodecInfo);
   for (UINT j = 0; j < num; ++j) {
      if ( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 ) {
         *pClsid = pImageCodecInfo[j].Clsid;
         free(pImageCodecInfo);
         return j;  // Success
      }
   }
   free(pImageCodecInfo);
   return -1;  // Failure
}
int wmain(int argc,wchar_t *argv[]) {
    int r=1;
    if (argc<4) {
    USAGE:
        wprintf(L"%s srcimg.{bmp|jpg|gif|tif|png|wmf|emf|ico}  desimg.{bmp|jpg|gif|tif|png}  angle\n",argv[0]);
        return r;
    }
    int i;
    for (i=0;i<5;i++) {
        if (0==_wcsicmp(argv[1]+wcslen(argv[1])-4,exts[i])) break;
    }
    if (i>=5) goto USAGE;
    for (i=0;i<5;i++) {
        if (0==_wcsicmp(argv[2]+wcslen(argv[2])-4,exts[i])) break;
    }
    if (i>=5) goto USAGE;
    GdiplusStartupInput gdiplusstartupinput;
    ULONG_PTR gdiplustoken;
    GdiplusStartup(&gdiplustoken, &gdiplusstartupinput, NULL);
    {
        Image img(argv[1]);
        if (Ok==img.GetLastStatus()) {
            UINT height = img.GetHeight();
            UINT width  = img.GetWidth();
            REAL angle;
            if (1==swscanf_s(argv[3],L"%f",&angle)) {
                REAL size;
                size=(REAL)sqrt(1.0*width*width+1.0*height*height);
                Matrix mat;
                mat.Translate(size / -2.0f, size / -2.0f);
                mat.Rotate(-angle, MatrixOrderAppend);
                mat.Translate(size / 2.0f, size / 2.0f, MatrixOrderAppend);
                PointF pfTL((size-width)/2.0f      ,(size-height)/2.0f       );
                PointF pfTR((size-width)/2.0f+width,(size-height)/2.0f       );
                PointF pfBL((size-width)/2.0f      ,(size-height)/2.0f+height);
                PointF pfBR((size-width)/2.0f+width,(size-height)/2.0f+height);
                Graphics tgp(&img);
                Bitmap bmp((UINT)size,(UINT)size,&tgp);//Let bmp Resolution equal to img Resolution
                Graphics gp(&bmp);
                gp.SetTransform(&mat);
                gp.DrawImage(&img,pfTL);
                REAL xmin,ymin,xmax,ymax,x,y,rw,rh;
                mat.TransformPoints(&pfTL);
                xmin=xmax=pfTL.X;
                ymin=ymax=pfTL.Y;
                mat.TransformPoints(&pfTR);
                if (xmin>pfTR.X) xmin=pfTR.X;
                if (xmax<pfTR.X) xmax=pfTR.X;
                if (ymin>pfTR.Y) ymin=pfTR.Y;
                if (ymax<pfTR.Y) ymax=pfTR.Y;
                mat.TransformPoints(&pfBL);
                if (xmin>pfBL.X) xmin=pfBL.X;
                if (xmax<pfBL.X) xmax=pfBL.X;
                if (ymin>pfBL.Y) ymin=pfBL.Y;
                if (ymax<pfBL.Y) ymax=pfBL.Y;
                mat.TransformPoints(&pfBR);
                if (xmin>pfBR.X) xmin=pfBR.X;
                if (xmax<pfBR.X) xmax=pfBR.X;
                if (ymin>pfBR.Y) ymin=pfBR.Y;
                if (ymax<pfBR.Y) ymax=pfBR.Y;
                x=xmin;
                y=ymin;
                rw=xmax-x;
                rh=ymax-y;
                Bitmap* clone;
                clone = bmp.Clone(x,y,rw,rh,PixelFormat24bppRGB);//bmp.GetPixelFormat()
                CLSID encoderClsid;
                if (0<=GetEncoderClsid(formats[i],&encoderClsid)) {
                    if (Ok==clone->Save(argv[2],&encoderClsid)) {
                        wprintf(L"OK to %s  %s  %s  %s\n",argv[0],argv[1],argv[2],argv[3]);
                        r=0;
                    } else {
                        wprintf(L"Error to save %s\n",argv[2]);
                        r=4;
                    }
                } else {
                    wprintf(L"Error to GetEncoderClsid(%s,...)\n",formats[i]);
                    r=3;
                }
                delete clone;
            } else {
                wprintf(L"Error to get angle %s\n",argv[3]);
                r=2;
            }
        } else {
            wprintf(L"Error to load %s\n",argv[1]);
            r=5;
        }
    }
    GdiplusShutdown(gdiplustoken);
    return r;
}

[云峰工作室]

好人好人好人好人好人好人

[nettman]

[nettman]

[jyxuan94]

[line_us]

看起来很不错的样子

[花开花折]

[lx624909677]

[ljheee]

感觉效果蛮绚啊

[china_jeffery]

老师还在坚持微软这一套，不容易

[孤客天涯]

[bluemoon1212]

楼主，您好！看您分享的帖子关于各个版本Visual Studio下载的，2008版的分享已取消。可否分享一下？谢谢！

[marslycan]

给大佬跪了~~~~~~~

[flyhigh]

一起来开源，SOUI开源库的一个3D变换例子。
代码： https://github.com/soui2/soui