PKHeX/Misc/Util.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.IO;

namespace PKHeX
{
    public partial class Util
    {
        public static Image layerImage(Image baseLayer, Image overLayer, int x, int y, double trans)
        {
            Bitmap overlayImage = (Bitmap)overLayer;
            Bitmap newImage = (Bitmap)baseLayer;
            if (baseLayer == null) return overLayer;
            for (int i = 0; i < (overlayImage.Width * overlayImage.Height); i++)
            {
                Color newColor = overlayImage.GetPixel(i % (overlayImage.Width), i / (overlayImage.Width));
                Color oldColor = newImage.GetPixel(i % (overlayImage.Width) + x, i / (overlayImage.Width) + y);
                newColor = Color.FromArgb((int)((double)(newColor.A) * trans), newColor.R, newColor.G, newColor.B); // Apply transparency change
                // if (newColor.A != 0) // If Pixel isn't transparent, we'll overwrite the color.
                {
                    // if (newColor.A < 100) 
                    newColor = AlphaBlend(newColor, oldColor);
                    newImage.SetPixel(
                        i % (overlayImage.Width) + x,
                        i / (overlayImage.Width) + y,
                        newColor);
                }
            }
            return newImage;
        }
        public static string GetTempFolder() // From 3DSSE's decompiled source.
        {
            string tempPath = Path.GetTempPath();
            string str2 = "SE3DS";
            str2 = "3DSSE";
            tempPath = Path.Combine(tempPath, str2);
            // Directory.CreateDirectory(tempPath);
            return (tempPath + "/");
        }

        public static Color AlphaBlend(Color ForeGround, Color BackGround)
        {
            if (ForeGround.A == 0)
                return BackGround;
            if (BackGround.A == 0)
                return ForeGround;
            if (ForeGround.A == 255)
                return ForeGround;
            int Alpha = Convert.ToInt32(ForeGround.A) + 1;
            int B = Alpha * ForeGround.B + (255 - Alpha) * BackGround.B >> 8;
            int G = Alpha * ForeGround.G + (255 - Alpha) * BackGround.G >> 8;
            int R = Alpha * ForeGround.R + (255 - Alpha) * BackGround.R >> 8;
            int A = ForeGround.A;
            if (BackGround.A == 255)
                A = 255;
            if (A > 255)
                A = 255;
            if (R > 255)
                R = 255;
            if (G > 255)
                G = 255;
            if (B > 255)
                B = 255;
            return Color.FromArgb(Math.Abs(A), Math.Abs(R), Math.Abs(G), Math.Abs(B));
        }
    }
}