}

	unsafe bool CaptureReactionColor()

	{

		// Take a screenshot.

		byte r, g, b;

		int pixelStart, otherPixelStart;

		bool colorMatch;

		screenBuffer.GetFromDrawable(rootWindow,

			rootWindow.Colormap, 0, 0, 0, 0, screenWidth, screenHeight);

		int stride = screenBuffer.Rowstride;

		byte* pixBytes = (byte*)screenBuffer.Pixels;

		for (int x = 0; x < screenWidth - colorBarWidth; ++x)

		{

			for (int y = 0; y < (screenHeight - 53); ++y)

			{

				// Look for the color swatch.

				pixelStart = (y * stride) + (x * 3);

				r = pixBytes[pixelStart];

				g = pixBytes[pixelStart + 1];

				b = pixBytes[pixelStart + 2];

				// 1.) Check if this is a dark pixel.

				{

					// 2.) Check the pixel above it,

					// to see if it's from the papy texture.

					otherPixelStart = pixelStart - stride;

					if ((otherPixelStart >= 0) &&

					    IsPapyTexture(pixBytes[otherPixelStart++],

					                   pixBytes[otherPixelStart++],

					                   pixBytes[otherPixelStart]))

					{

						// 3.) Check the pixel below where the swatch should be,

						// to see if it's also from the papy texture.

						otherPixelStart = pixelStart + (stride * swatchHeight);

						if (IsPapyTexture(pixBytes[otherPixelStart++],

					                   pixBytes[otherPixelStart++],

					                   pixBytes[otherPixelStart]))

						{

							// pixBytes[pixelStart] = 0xFF;

							// pixBytes[pixelStart + 1] = 0x00;

							// pixBytes[pixelStart + 2] = 0xFF;

							// 4.) Scan the left border of the potential swatch

							// location.

							colorMatch = true;

							for (int i = 1; i < swatchHeight - 2; ++i)

							{

								otherPixelStart = pixelStart + (stride * i);

								if ((Math.Abs(r - pixBytes[otherPixelStart++]) > colorTolerance) ||

								    (Math.Abs(g - pixBytes[otherPixelStart++]) > colorTolerance) ||

								    (Math.Abs(b - pixBytes[otherPixelStart]) > colorTolerance))

								{

									colorMatch = false;

									break;

								}

							}

							if (colorMatch)

							{

								// WE FOUND THE SWATCH!

								// Now we know where the color bars are.

								otherPixelStart = pixelStart + (redBarSpacing * stride);

								int pixelCount = 0;

								{

									pixelCount++;

									// pixBytes[otherPixelStart] = 0x00;

									// pixBytes[otherPixelStart + 1] = 0xFF;

									// pixBytes[otherPixelStart + 2] = 0xFF;

									otherPixelStart += 3;

								}

								reactedColor.Red = (byte)Math.Round((float)pixelCount * 255f / (float)colorBarWidth);

								otherPixelStart = pixelStart + (greenBarSpacing * stride);

								pixelCount = 0;		

								{

									pixelCount++;

									// pixBytes[otherPixelStart] = 0x00;

									// pixBytes[otherPixelStart + 1] = 0xFF;

									// pixBytes[otherPixelStart + 2] = 0xFF;

									otherPixelStart += 3;

								}

								reactedColor.Green = (byte)Math.Round((float)pixelCount * 255f / (float)colorBarWidth);

								otherPixelStart = pixelStart + (blueBarSpacing * stride);

								pixelCount = 0;

								{

									pixelCount++;

									// pixBytes[otherPixelStart] = 0x00;

									// pixBytes[otherPixelStart + 1] = 0xFF;

									// pixBytes[otherPixelStart + 2] = 0xFF;

									otherPixelStart += 3;

								}

								reactedColor.Blue = (byte)Math.Round((float)pixelCount * 255f / (float)colorBarWidth);

								// screenBuffer.Save("screenshot.png", "png");

								return true;

							}

						}					

					}

				}

			}

		}

		// screenBuffer.Save("screenshot.png", "png");

		return false;

	}

	protected virtual void OnCaptureButton(object sender, System.EventArgs e)

	{

		if (CaptureReactionColor())

		{

			string warning = "";

			if (reactedColor.Red == 0)

			{

				warning = warning + "\nRed is too low.";

			}

			if (reactedColor.Green == 0)

			{

				warning = warning + "\nGreen is too low.";	

			}

			if (reactedColor.Blue == 0)

			{

				warning = warning + "\nBlue is too low.";	

			}

			if (reactedColor.Red == 255)

			{

			}

			if (reactedColor.Green == 255)

			{

			}

			if (reactedColor.Blue == 255)

			{

			}

			if (warning.Length != 0)

			{

				MessageDialog md = new MessageDialog(this, 

	            DialogFlags.DestroyWithParent,

	            MessageType.Error, ButtonsType.Ok, 

	            "Reaction clipped.  You will need to do a " +

	            "3-way reaction to test this pair.  Details: " +

	            warning);

				md.Run();			

				md.Destroy();

			}

			else

			{

				this.reactionSwatch.Color = reactedColor;

				saveButton.Sensitive = true;

			}

		}

		else

		{

			MessageDialog md = new MessageDialog(this, 

	            DialogFlags.DestroyWithParent,

This is a tool for players to record their [Pigment Laboratory](http://www.atitd.org/wiki/tale6/Pigment_Laboratory)

ingredient reactions in [A Tale in the Desert](http://www.atitd.com/).

### Features

* Easily scans your screen for the paint bench reaction values, without any math, measuring, or manual number entry.

* Warns you when a reaction clipped below 0.

* Supports multiple character profiles.

* Can export to [PracticalPaint](http://www.atitd.org/wiki/tale6/File:PracticalPaint.zip) data format.

* Includes simulator for experimenting with recipes without spending ingredients.

## Tale 7

This application has been updated for Tale 7.  The current version is a **RELEASE CANDIDATE**.  It may be buggy.

If you find any problems with it, please [open an issue](https://bitbucket.org/Malkyne/desert-paint-lab/issues) or /chat Afrah

in the game.

## Directions

### Download Desert Paint Lab

You can always find the available downloads, on [the download page](https://bitbucket.org/Malkyne/desert-paint-lab/downloads).

This application should run under Mono on Mac, Linux, and Windows.  If you are on Windows,

and do not have Mono installed, you can install [GTK# for .NET](http://www.mono-project.com/download/#download-win),

without the need for installing Mono.

### Set Up a Profile

The first time you run Desert Paint Lab, it will prompt you to make a profile.  You may either create a new profile, or import an existing PracticalPaint reactions.txt file.

### Start Testing!

Add two ingredients to your paint bench.  Select those same ingredients in Desert Paint Lab.  Then, with the Pigment Lab dialog unobstructred, select the **Capture** button.  Once you are satisfied with the result, click the **Record** button.  The data will automatically be added to your profile.

### Clipped?  Huh?

Occasionally, you will see a warning dialog that informs you that a "Reaction clipped."  That means that one or more of the color components moved outside of the testable range.  This makes it impossible to calculate the reaction from these two ingredients.

You can solve this by doing a three-way test.  To do this, select a third ingredient that has known reaction values with the two ingredients you are attempting to pair, and which will adjust the color component that was clipping, so that it is no longer doing so.  Combine that with your two ingredients.  In Desert Paint Lab, you'll want to select a known pairing in the first two boxes, and the other ingredient in the third.  Desert Paint Lab can then do all the math to figure out the mystery reaction.

In many cases, it may be easiest to go back and do these three-way tests after you have finished all of your other testing.

### Finishing Up

When you're done testing your reactions, you can either use the built-in Pigment Lab simulator (`Window > Run Simulator`) to experiment with recipes, without dipping into your precious ingredient stocks.  Alternatively, you can export your reactions in PracticalPaint format.