how to convert graphics to bitmap in GDI? (C++ or AHK)
Posted: 21 May 2014, 06:10
I have this code:
pBitmap refers to bitmap (picture of window). I want to do rotation with the pBitmap2 but I cannot find out
1) how to insert the bitmap (picture) into the bitmap2 (empty one - just created)
2) how to get the graphics back to bitmap.
3) Edit: I think 1) is not what I really need. I need to convert graphics to bitmap. BUt when I call
GdipCreateBitmapFromGraphics I got blank file! So pls how to convert the graphics to bitmap?
result = Gdiplus::DllExports::GdipCreateBitmapFromGraphics(60, 60, pG, &pBitmap2);
If you know how to do it in AHK, pls help and I will find out how to do it in C++. If you know how to do it in C++ help me with C++ version directly.
Code: Select all
GpGraphics * pG;
// I create graphics from bitmap
result = Gdiplus::DllExports::GdipGetImageGraphicsContext(pBitmap, &pG);
// here to work with graphics
// here to check the image ... save to file
CLSID pngClsid;
GetEncoderClsid(L"image/png", &pngClsid);
GpBitmap* pBitmap2;
result = Gdiplus::DllExports::GdipCreateBitmapFromGraphics(60, 60, pG, &pBitmap2);
1) how to insert the bitmap (picture) into the bitmap2 (empty one - just created)
2) how to get the graphics back to bitmap.
3) Edit: I think 1) is not what I really need. I need to convert graphics to bitmap. BUt when I call
GdipCreateBitmapFromGraphics I got blank file! So pls how to convert the graphics to bitmap?
result = Gdiplus::DllExports::GdipCreateBitmapFromGraphics(60, 60, pG, &pBitmap2);
If you know how to do it in AHK, pls help and I will find out how to do it in C++. If you know how to do it in C++ help me with C++ version directly.