c++ 图片加水印

最新推荐文章于 2025-06-05 14:06:03 发布

zgq_work

最新推荐文章于 2025-06-05 14:06:03 发布

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分类专栏： C++ 文章标签： c++ image float path include null

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这篇博客展示了如何使用C++和GDI+库在图片上添加文字水印。通过GdiplusStartup初始化，然后利用FontFamily, Font, SolidBrush和Graphics类创建文字和画刷，将文字绘制到Bitmap对象上，最后保存带有水印的图片。" 129576665,10573022,TypeScript装饰器实现接口字段映射与Mock,"['前端开发', 'typescript', 'JSON', '装饰器模式']

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#include "stdafx.h"
#include "gdiplus.h"
#include "atlimage.h"
using namespace Gdiplus;
#include <string>
using namespace std;
GdiplusStartupInput gSDKdiplusStartupInput = 0;
ULONG_PTR gSDKdiplusToken = 0;

int GetEncoderClsidOwn(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
}

void main()

{

GdiplusStartup(&gSDKdiplusToken, &gSDKdiplusStartupInput, NULL);

USES_CONVERSION;
FontFamily fontFamily(L"Arial");
  float fontSize = 12*(float)abs(2);
  Font        font(&fontFamily, fontSize, FontStyleBold, UnitPixel);
  SolidBrush blackBrush(Color(0, 0, 0));
  PointF pointF(1, 1);
  CLSID encoderClsid;
  GetEncoderClsidOwn(L"image/jpeg", &encoderClsid);
  string filename;
  WCHAR wfilename[MAX_PATH];
  for(int i=0;i<20;i++)
  {
   filename = "out_";
   char str[4];
   itoa(i, str, 10);
   filename = filename+str;
   filename=filename+".jpg";
   memset(wfilename,0,MAX_PATH);
   wcscpy(wfilename, T2W(filename.c_str()) );
   Bitmap bmp(L"sample.jpg");
   Graphics g(&bmp);
   g.DrawString(wfilename, -1, &font, pointF, &blackBrush);
   bmp.Save(wfilename,&encoderClsid);
   printf("%d/n",i);
  }

GdiplusShutdown(gSDKdiplusToken);

}