#include "stdafx.h"
#include <windows.h>
#include <gdiplus.h>
#include <stdio.h>
using namespace Gdiplus;
#pragma comment(lib, "gdiplus.lib")
int GetEncoderClsid(const WCHAR* format, CLSID* pClsid)
{
UINT num= 0;
UINT size= 0;
ImageCodecInfo* pImageCodecInfo= NULL;
GetImageEncodersSize(&num, &size);
if(size== 0)
{
return -1;
}
pImageCodecInfo= (ImageCodecInfo*)(malloc(size));
if(pImageCodecInfo== NULL)
{
return -1;
}
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;
}
}
free(pImageCodecInfo);
return -1;
}
// 从内存加载图片，失败返回NULL
Bitmap* LoadBitmapFromMemory(const void* memory, DWORD size)
{
Bitmap* bmp = NULL;
IStream* stream = NULL;
if (CreateStreamOnHGlobal(NULL, TRUE, &stream) == S_OK)
{
ULARGE_INTEGER uli;
uli.QuadPart = size;
stream->SetSize(uli);
if (stream->Write(memory, size, NULL) == S_OK)
bmp = new Bitmap(stream);
stream->Release();
}
return bmp;
}
// 从文件加载图片，不独占文件，失败返回NULL
Bitmap* LoadBitmapFromFile(const TCHAR* file_name)
{
Bitmap* bmp = NULL;
HANDLE file_handle = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (file_handle != INVALID_HANDLE_VALUE)
{
DWORD temp = 0;
DWORD file_size = GetFileSize(file_handle, &temp);
if (file_size && !temp) // 不处理大于4G的文件
{
// 将图片文件读到内存后，再从内存创建Bitmap
unsigned char* buffer = new unsigned char[file_size];
if (ReadFile(file_handle, buffer, file_size, &temp, NULL))
bmp = LoadBitmapFromMemory(buffer, temp);
delete [] buffer;
}
CloseHandle(file_handle);
}
return bmp;
}
int _tmain(int argc, _TCHAR* argv[])
{
GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);//开启GID+,一定要开启，不然图片读取不了
Status stat;
CLSID clsid;
char propertyValue[] = "Fake Photograph";
Bitmap* bitmap = LoadBitmapFromFile(L"E:/sandbox/stone.jpg");
PropertyItem* propertyItem = new PropertyItem;
// Get the CLSID of the JPEG encoder.
GetEncoderClsid(L"image/jpeg", &clsid);
propertyItem->id = PropertyTagCopyright;
propertyItem->length = 16; // string length including NULL terminator
propertyItem->type = PropertyTagTypeASCII;
propertyItem->value = propertyValue;
bitmap->SetPropertyItem(propertyItem);
stat = bitmap->Save(L"E:/sandbox/stone.jpg", &clsid, NULL);
if(stat == Ok)
printf("FakePhoto2.jpg saved successfully.\n");
delete propertyItem;
delete bitmap;
GdiplusShutdown(gdiplusToken);
return 0;
return 0;
}