python - Making Gradient Images Quickly with C++ -

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I am currently working with Python to create images of gradient, however, I am scared for my use That Python can be very slow I know that Python can be extended with C ++ with relative ease

So what are some quick ways to create gradients in C ++?

Manually writing bitmap is quite easy. For Windows bitmap, you need 54 byte headers and then an array of color values. ()

So, create a file, write header, supply the pixel array

.pgm / .ppm files are much easier because they have very easy headers.

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