coding UTF-8;      // Specify character encoding (prevents garbled text)
import Graphics;   // Import graphics library for image processing


// Ask the user to choose an image file and load it into a graphics resource
string inputFilePath = choose("Please select the image file to convert.", "./");
int inputGraphics = newGraphics(inputFilePath);

// Ask the user for the RGB values of the color to make transparent
int fromRed   = input("Red value of the color to make transparent (0-255)?", "0");
int fromGreen = input("Green value of the color to make transparent (0-255)?", "255");
int fromBlue  = input("Blue value of the color to make transparent (0-255)?", "0");
int fromAlpha = 255; // Alpha of the original color (0 = fully transparent, 255 = fully opaque)

// Define the replacement color (set this if you want to replace with a non-transparent color)
int toRed   = 0; // Red
int toGreen = 0; // Green
int toBlue  = 0; // Blue
int toAlpha = 0; // Alpha (0 = fully transparent, 255 = fully opaque)


// Create a new graphics resource with the specified color converted
int outputGraphics = newGraphics(
	inputGraphics,                           // Original image
	fromRed, fromGreen, fromBlue, fromAlpha, // Color to convert (input by user)
	toRed,   toGreen,   toBlue,   toAlpha    // Replacement color (transparent)
);

// Save the result under a new file name
string outputFilePath = inputFilePath + "_clear.png"; // Filename = original + "_clear.png"
exportGraphics(outputGraphics, outputFilePath, "PNG"); // Save as PNG format
popup("Conversion complete! Saved file: " + outputFilePath); // Show completion message

// Clean up and exit
deleteGraphics(inputGraphics);
deleteGraphics(outputGraphics);
exit();