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Add fast pixel upscale

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1->X sized scaling; preferred when scale is large enough and you want to retain raw access to pixel data.
This commit is contained in:
Kurt 2020-04-08 14:34:52 -07:00
parent 29b03cc428
commit 5e99e24628
1 changed files with 36 additions and 2 deletions
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38
NHSE.Sprites/Util/ImageUtil.cs
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@ -1,4 +1,5 @@
using System.Drawing;
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
@ -21,7 +22,17 @@ public static Bitmap GetPalette(this DesignPattern bg)
public static Bitmap GetBitmap(byte[] data, int width, int height, PixelFormat format = PixelFormat.Format32bppArgb)
{
var bmp = new Bitmap(width, height, format);
var bmpData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.WriteOnly, format);
var bmpData = bmp.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, format);
var ptr = bmpData.Scan0;
Marshal.Copy(data, 0, ptr, data.Length);
bmp.UnlockBits(bmpData);
return bmp;
}
public static Bitmap GetBitmap(int[] data, int width, int height, PixelFormat format = PixelFormat.Format32bppArgb)
{
var bmp = new Bitmap(width, height, format);
var bmpData = bmp.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, format);
var ptr = bmpData.Scan0;
Marshal.Copy(data, 0, ptr, data.Length);
bmp.UnlockBits(bmpData);
@ -50,5 +61,28 @@ public static Bitmap ResizeImage(Image image, int width, int height)
return destImage;
}
public static int[] ScalePixelImage(int[] data, int scale, int w, int h, out int fW, out int fH)
{
fW = scale * w;
fH = scale * h;
var scaled = new int[fW * fH];
// For each pixel, copy to the X indexes, then block copy the row to the other rows.
for (int y = 0, i = 0; y < fH; y += scale)
{
var baseIndex = y * fW;
for (int x = 0; x < fW; x += scale, i++)
{
for (int x1 = 0; x1 < scale; x1++)
scaled[baseIndex + x + x1] = data[i];
}
for (int y1 = 1; y1 < scale; y1++)
Array.Copy(scaled, baseIndex, scaled, baseIndex + (y1 * fW), fW);
}
return scaled;
}
}
}