what is the difference between bisizeimage , bisize and bfsize?

Question

i\'m new to this field ,and i get confused between some terms!

bisizeimage, bisize and bfsize!

please i need a s

Answer 1

bfSize = biSizeImage + sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER)
bfSize = biSizeImage + 54               

// since BITMAPFILEHEADER = 40 and BITMAPINFOHEADER = 14 

biSizeImage = (biWidth * sizeof(RGBTRIPLE) + padding) * abs(biHeight)