/// <summary>
/// Fills the surrounding, contiguous color area with a new color
/// </summary>
/// <param name="x">x-coordinate to start at in pixel coordinates</param>
/// <param name="y">y-coordinate to start at in pixel coordinates</param>
/// <param name="fillIndex">Palette index to fill with</param>
/// <returns>True if any pixels were modified</returns>
public static bool FloodFill(this IndexedImage image, int x, int y, byte fillIndex)
{
bool isModified = false;
var replaceIndex = image.GetPixel(x, y);
var startingPalette = image.GetElementAtPixel(x, y).Value.Palette;
if (fillIndex == replaceIndex)
{
return(false);
}
var openNodes = new Stack <(int x, int y)>();
openNodes.Push((x, y));
while (openNodes.Count > 0)
{
var nodePosition = openNodes.Pop();
if (nodePosition.x >= 0 && nodePosition.x < image.Width && nodePosition.y >= 0 && nodePosition.y < image.Height)
{
var nodeColor = image.GetPixel(nodePosition.x, nodePosition.y);
if (nodeColor == replaceIndex)
{
var destPalette = image.GetElementAtPixel(nodePosition.x, nodePosition.y).Value.Palette;
if (ReferenceEquals(startingPalette, destPalette))
{
isModified = true;
image.SetPixel(nodePosition.x, nodePosition.y, fillIndex);
openNodes.Push((nodePosition.x - 1, nodePosition.y));
openNodes.Push((nodePosition.x + 1, nodePosition.y));
openNodes.Push((nodePosition.x, nodePosition.y - 1));
openNodes.Push((nodePosition.x, nodePosition.y + 1));
}
}
}
}
return(isModified);
}
private static MagitekResult CanRemapByExactPaletteColors(DirectImage source, IndexedImage dest, Point sourceStart, Point destStart, int copyWidth, int copyHeight)
{
for (int y = 0; y < copyHeight; y++)
{
for (int x = 0; x < copyWidth; x++)
{
var color = source.GetPixel(x + sourceStart.X, y + sourceStart.Y);
if (dest.CanSetPixel(x + destStart.X, y + destStart.Y, color).Value is MagitekResult.Failed)
{
var palName = dest.GetElementAtPixel(x + destStart.X, y + destStart.Y)?.Palette?.Name ?? "Undefined";
return(new MagitekResult.Failed($"Destination image at (x: {destStart.X}, y: {destStart.Y}) with element palette '{palName}' could not be set to the source color ({color.A}, {color.R}, {color.G}, {color.B})"));
}
}
}
return(MagitekResult.SuccessResult);
}
private static MagitekResult CanRemapByExactIndex(IndexedImage source, IndexedImage dest, Point sourceStart, Point destStart, int copyWidth, int copyHeight)
{
for (int y = 0; y < copyHeight; y++)
{
for (int x = 0; x < copyWidth; x++)
{
var el = source.GetElementAtPixel(sourceStart.X + x, sourceStart.Y + y);
if (el is ArrangerElement element)
{
if ((1 << element.Codec.ColorDepth) < dest.GetPixel(destStart.X + x, destStart.Y + y))
{
return(new MagitekResult.Failed($"Destination image contains a palette index too large to map to the source image pixels at destination position ({destStart.X + x}, {destStart.Y + y}) and source position ({sourceStart.X + x}, {sourceStart.Y + y})"));
}
}
}
}
return(MagitekResult.SuccessResult);
}
