CODEWITHSUNDEEP
bitmapbitmapimage
Lisa
Lisa

Reputation: 53

Write a bmp image from a c++ array

I have written a class to perform certain manipulations on a 3D grayscale image that I have placed in a vector container of doubles and use indexing to iterate through the rows, columns and slices.

I want to output this image as a bitmap file. I know I have to first write the header info but I've no clue how to go about it.

Upvotes: 0

Views: 722

Answers (1)

TieDad
TieDad

Reputation: 9929

You can use fwrite(). This function can write struct of data into file.

For example you define the header as a struct:

struct Header {
     int len;
     ...
}

struct Header header;
header.len = any_len;
hander. = ... ; // any other info of header

fwrite(&header, sizeof(header), 1, fp);

This way, you write header info into the file.

Then, if your bmp content is in an array of doubles:

double dots[N]; // this is your bmp point array
fwrite(dots, sizeof(double) * N, 1, fp);

Upvotes: 1

Related Questions