I need a function to invert the picture. The inverting the picture means you rev

Q: I need a function to invert the picture. The inverting the picture means you rev

You can get the width and height before the loop then use for (x = 1 ; x < width; x++) for Y = 1; y < height; y++) BTW, I think invert color should be 255- R, not R-255, because 255 is the max value

ID: 3545799 • Letter: I

Question

I need a function to invert the picture. The inverting the picture means you reverse all the pixel colors. Eg: Like Color(R-255, G-255, B-255). It is my C++ homework. I tried to solved it but stop by how to check that image's color then invert color. I think that I should create two for loops like

for(x=1, x<801, ++x){

for(y=1, y<801, ++y){

putpixel(x, y,COLOR(R-255, G-255, B-255));}}

But there is a problem that it is the putpixel function does not check my image. Could someone tell me how to solve this problem please?

Assume I already have saveimage() and loadimage()function to save and load in memory and putpixe(x, y, color(R, G, B) for draw.

If you need more details plase comment there.

By the way, I do not need a complete design, just this one function

Explanation / Answer

You can get the width and height before the loop then

use for (x = 1 ; x < width; x++)

for Y = 1; y < height; y++)

BTW, I think invert color should be 255- R, not R-255, because 255 is the max value

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I need a function to invert the picture. The inverting the picture means you rev

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