mirror of
https://github.com/SubtitleEdit/subtitleedit.git
synced 2024-10-27 14:32:35 +01:00
1122 lines
40 KiB
C#
1122 lines
40 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Runtime.InteropServices;
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using Nikse.SubtitleEdit.Core.VobSub;
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namespace Nikse.SubtitleEdit.Core
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{
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public class RunLengthTwoParts
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{
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public byte[] Buffer1 { get; set; }
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public byte[] Buffer2 { get; set; }
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public int Length { get { return Buffer1.Length + Buffer2.Length; } }
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}
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public class NikseBitmap
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{
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public int Width { get; private set; }
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public int Height { get; private set; }
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private byte[] _bitmapData;
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private int _pixelAddress;
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public NikseBitmap(int width, int height)
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{
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Width = width;
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Height = height;
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_bitmapData = new byte[Width * Height * 4];
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}
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public NikseBitmap(int width, int height, byte[] bitmapData)
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{
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Width = width;
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Height = height;
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_bitmapData = bitmapData;
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}
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public NikseBitmap(Bitmap inputBitmap)
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{
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if (inputBitmap == null)
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return;
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Width = inputBitmap.Width;
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Height = inputBitmap.Height;
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if (inputBitmap.PixelFormat != PixelFormat.Format32bppArgb)
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{
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var newBitmap = new Bitmap(inputBitmap.Width, inputBitmap.Height, PixelFormat.Format32bppArgb);
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using (var gr = Graphics.FromImage(newBitmap))
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{
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gr.DrawImage(inputBitmap, 0, 0);
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}
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inputBitmap.Dispose();
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inputBitmap = newBitmap;
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}
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var bitmapData = inputBitmap.LockBits(new Rectangle(0, 0, Width, Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
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_bitmapData = new byte[bitmapData.Stride * Height];
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Marshal.Copy(bitmapData.Scan0, _bitmapData, 0, _bitmapData.Length);
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inputBitmap.UnlockBits(bitmapData);
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}
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public NikseBitmap(NikseBitmap input)
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{
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Width = input.Width;
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Height = input.Height;
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_bitmapData = new byte[input._bitmapData.Length];
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Buffer.BlockCopy(input._bitmapData, 0, _bitmapData, 0, _bitmapData.Length);
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}
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public void ReplaceNotDarkWithWhite()
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{
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var buffer = new byte[3];
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buffer[0] = 255;
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buffer[1] = 255;
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buffer[2] = 255;
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for (int i = 0; i < _bitmapData.Length; i += 4)
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{
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if (_bitmapData[i + 3] > 200 && // Alpha
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_bitmapData[i + 2] + _bitmapData[i + 1] + _bitmapData[i] > 200)
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Buffer.BlockCopy(buffer, 0, _bitmapData, i, 3);
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}
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}
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public void ReplaceYellowWithWhite()
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{
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var buffer = new byte[3];
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buffer[0] = 255;
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buffer[1] = 255;
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buffer[2] = 255;
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for (int i = 0; i < _bitmapData.Length; i += 4)
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{
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if (_bitmapData[i + 3] > 200 && // Alpha
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_bitmapData[i + 2] > 199 && // Red
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_bitmapData[i + 1] > 190 && // Green
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_bitmapData[i] < 40) // Blue
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Buffer.BlockCopy(buffer, 0, _bitmapData, i, 3);
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}
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}
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public void ReplaceNonWhiteWithTransparent()
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{
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var buffer = new byte[4];
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buffer[0] = 0; // B
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buffer[1] = 0; // G
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buffer[2] = 0; // R
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buffer[3] = 0; // A
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for (int i = 0; i < _bitmapData.Length; i += 4)
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{
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if (_bitmapData[i + 2] + _bitmapData[i + 1] + _bitmapData[i] < 300)
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Buffer.BlockCopy(buffer, 0, _bitmapData, i, 4);
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}
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}
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public void ReplaceTransparentWith(Color c)
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{
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var buffer = new byte[4];
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buffer[0] = c.B;
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buffer[1] = c.G;
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buffer[2] = c.R;
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buffer[3] = c.A;
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for (int i = 0; i < _bitmapData.Length; i += 4)
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{
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if (_bitmapData[i + 3] < 10)
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Buffer.BlockCopy(buffer, 0, _bitmapData, i, 4);
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}
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}
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public void MakeOneColor(Color c)
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{
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var buffer = new byte[4];
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buffer[0] = c.B;
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buffer[1] = c.G;
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buffer[2] = c.R;
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buffer[3] = c.A;
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var bufferTransparent = new byte[4];
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bufferTransparent[0] = 0;
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bufferTransparent[1] = 0;
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bufferTransparent[2] = 0;
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bufferTransparent[3] = 0;
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for (int i = 0; i < _bitmapData.Length; i += 4)
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{
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if (_bitmapData[i] > 20)
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Buffer.BlockCopy(buffer, 0, _bitmapData, i, 4);
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else
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Buffer.BlockCopy(bufferTransparent, 0, _bitmapData, i, 4);
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}
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}
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public int MakeOneColorRemoverOthers(Color c1, Color c2, int maxDif)
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{
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var buffer1 = new byte[4];
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buffer1[0] = c1.B;
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buffer1[1] = c1.G;
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buffer1[2] = c1.R;
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buffer1[3] = c1.A;
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var buffer2 = new byte[4];
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buffer2[0] = c2.B;
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buffer2[1] = c2.G;
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buffer2[2] = c2.R;
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buffer2[3] = c2.A;
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var bufferTransparent = new byte[4];
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bufferTransparent[0] = 0;
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bufferTransparent[1] = 0;
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bufferTransparent[2] = 0;
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bufferTransparent[3] = 0;
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int count = 0;
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for (int i = 0; i < _bitmapData.Length; i += 4)
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{
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if (_bitmapData[i + 3] > 20)
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{
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if ((Math.Abs(buffer1[0] - _bitmapData[i]) < maxDif &&
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Math.Abs(buffer1[1] - _bitmapData[i + 1]) < maxDif &&
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Math.Abs(buffer1[2] - _bitmapData[i + 2]) < maxDif) ||
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(Math.Abs(buffer2[0] - _bitmapData[i]) < maxDif &&
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Math.Abs(buffer2[1] - _bitmapData[i + 1]) < maxDif &&
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Math.Abs(buffer2[2] - _bitmapData[i + 2]) < maxDif))
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{
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count++;
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}
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else
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{
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Buffer.BlockCopy(bufferTransparent, 0, _bitmapData, i, 4);
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}
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}
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else
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{
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Buffer.BlockCopy(bufferTransparent, 0, _bitmapData, i, 4);
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}
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}
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return count;
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}
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private static Color GetOutlineColor(Color borderColor)
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{
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if (borderColor.R + borderColor.G + borderColor.B < 30)
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return Color.FromArgb(200, 75, 75, 75);
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return Color.FromArgb(150, borderColor.R, borderColor.G, borderColor.B);
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}
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/// <summary>
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/// Convert a x-color image to four colors, for e.g. DVD sub pictures.
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/// </summary>
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/// <param name="background">Background color</param>
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/// <param name="pattern">Pattern color, normally white or yellow</param>
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/// <param name="emphasis1">Emphasis 1, normally black or near black (border)</param>
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/// <param name="useInnerAntialize"></param>
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public Color ConverToFourColors(Color background, Color pattern, Color emphasis1, bool useInnerAntialize)
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{
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var backgroundBuffer = new byte[4];
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backgroundBuffer[0] = background.B;
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backgroundBuffer[1] = background.G;
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backgroundBuffer[2] = background.R;
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backgroundBuffer[3] = background.A;
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var patternBuffer = new byte[4];
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patternBuffer[0] = pattern.B;
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patternBuffer[1] = pattern.G;
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patternBuffer[2] = pattern.R;
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patternBuffer[3] = pattern.A;
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var emphasis1Buffer = new byte[4];
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emphasis1Buffer[0] = emphasis1.B;
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emphasis1Buffer[1] = emphasis1.G;
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emphasis1Buffer[2] = emphasis1.R;
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emphasis1Buffer[3] = emphasis1.A;
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var emphasis2Buffer = new byte[4];
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var emphasis2 = GetOutlineColor(emphasis1);
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if (!useInnerAntialize)
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{
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emphasis2Buffer[0] = emphasis2.B;
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emphasis2Buffer[1] = emphasis2.G;
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emphasis2Buffer[2] = emphasis2.R;
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emphasis2Buffer[3] = emphasis2.A;
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}
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for (int i = 0; i < _bitmapData.Length; i += 4)
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{
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int smallestDiff = 10000;
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byte[] buffer = backgroundBuffer;
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if (backgroundBuffer[3] == 0 && _bitmapData[i + 3] < 10) // transparent
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{
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}
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else
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{
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int patternDiff = Math.Abs(patternBuffer[0] - _bitmapData[i]) + Math.Abs(patternBuffer[1] - _bitmapData[i + 1]) + Math.Abs(patternBuffer[2] - _bitmapData[i + 2]) + Math.Abs(patternBuffer[3] - _bitmapData[i + 3]);
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if (patternDiff < smallestDiff)
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{
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smallestDiff = patternDiff;
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buffer = patternBuffer;
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}
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int emphasis1Diff = Math.Abs(emphasis1Buffer[0] - _bitmapData[i]) + Math.Abs(emphasis1Buffer[1] - _bitmapData[i + 1]) + Math.Abs(emphasis1Buffer[2] - _bitmapData[i + 2]) + Math.Abs(emphasis1Buffer[3] - _bitmapData[i + 3]);
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if (useInnerAntialize)
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{
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if (emphasis1Diff - 20 < smallestDiff)
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{
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buffer = emphasis1Buffer;
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}
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}
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else
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{
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if (emphasis1Diff < smallestDiff)
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{
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smallestDiff = emphasis1Diff;
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buffer = emphasis1Buffer;
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}
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int emphasis2Diff = Math.Abs(emphasis2Buffer[0] - _bitmapData[i]) + Math.Abs(emphasis2Buffer[1] - _bitmapData[i + 1]) + Math.Abs(emphasis2Buffer[2] - _bitmapData[i + 2]) + Math.Abs(emphasis2Buffer[3] - _bitmapData[i + 3]);
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if (emphasis2Diff < smallestDiff)
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{
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buffer = emphasis2Buffer;
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}
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else if (_bitmapData[i + 3] >= 10 && _bitmapData[i + 3] < 90) // anti-alias
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{
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buffer = emphasis2Buffer;
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}
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}
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}
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Buffer.BlockCopy(buffer, 0, _bitmapData, i, 4);
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}
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if (useInnerAntialize)
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return VobSubAntialize(pattern, emphasis1);
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return emphasis2;
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}
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private Color VobSubAntialize(Color pattern, Color emphasis1)
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{
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int r = (int)Math.Round(((pattern.R * 2.0 + emphasis1.R) / 3.0));
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int g = (int)Math.Round(((pattern.G * 2.0 + emphasis1.G) / 3.0));
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int b = (int)Math.Round(((pattern.B * 2.0 + emphasis1.B) / 3.0));
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Color antializeColor = Color.FromArgb(r, g, b);
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for (int y = 1; y < Height - 1; y++)
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{
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for (int x = 1; x < Width - 1; x++)
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{
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if (GetPixel(x, y) == pattern)
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{
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if (GetPixel(x - 1, y) == emphasis1 && GetPixel(x, y - 1) == emphasis1)
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SetPixel(x, y, antializeColor);
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else if (GetPixel(x - 1, y) == emphasis1 && GetPixel(x, y + 1) == emphasis1)
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SetPixel(x, y, antializeColor);
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else if (GetPixel(x + 1, y) == emphasis1 && GetPixel(x, y + 1) == emphasis1)
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SetPixel(x, y, antializeColor);
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else if (GetPixel(x + 1, y) == emphasis1 && GetPixel(x, y - 1) == emphasis1)
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SetPixel(x, y, antializeColor);
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}
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}
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}
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return antializeColor;
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}
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public RunLengthTwoParts RunLengthEncodeForDvd(Color background, Color pattern, Color emphasis1, Color emphasis2)
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{
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var backgroundBuffer = new byte[4];
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backgroundBuffer[0] = background.B;
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backgroundBuffer[1] = background.G;
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backgroundBuffer[2] = background.R;
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backgroundBuffer[3] = background.A;
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var patternBuffer = new byte[4];
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patternBuffer[0] = pattern.B;
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patternBuffer[1] = pattern.G;
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patternBuffer[2] = pattern.R;
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patternBuffer[3] = pattern.A;
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var emphasis1Buffer = new byte[4];
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emphasis1Buffer[0] = emphasis1.B;
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emphasis1Buffer[1] = emphasis1.G;
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emphasis1Buffer[2] = emphasis1.R;
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emphasis1Buffer[3] = emphasis1.A;
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var emphasis2Buffer = new byte[4];
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emphasis2Buffer[0] = emphasis2.B;
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emphasis2Buffer[1] = emphasis2.G;
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emphasis2Buffer[2] = emphasis2.R;
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emphasis2Buffer[3] = emphasis2.A;
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var bufferEqual = new byte[Width * Height];
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var bufferUnEqual = new byte[Width * Height];
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int indexBufferEqual = 0;
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int indexBufferUnEqual = 0;
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_pixelAddress = -4;
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for (int y = 0; y < Height; y++)
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{
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int index;
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byte[] buffer;
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if (y % 2 == 0)
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{
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index = indexBufferEqual;
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buffer = bufferEqual;
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}
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else
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{
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index = indexBufferUnEqual;
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buffer = bufferUnEqual;
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}
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var indexHalfNibble = false;
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var lastColor = -1;
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var count = 0;
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for (int x = 0; x < Width; x++)
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{
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int color = GetDvdColor(patternBuffer, emphasis1Buffer, emphasis2Buffer);
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if (lastColor == -1)
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{
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lastColor = color;
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count = 1;
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}
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else if (lastColor == color && count < 64) // only allow up to 63 run-length (for SubtitleCreator compatibility)
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{
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count++;
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}
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else
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{
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WriteRle(ref indexHalfNibble, lastColor, count, ref index, buffer);
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lastColor = color;
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count = 1;
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}
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}
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if (count > 0)
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WriteRle(ref indexHalfNibble, lastColor, count, ref index, buffer);
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if (indexHalfNibble)
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index++;
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if (y % 2 == 0)
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{
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indexBufferEqual = index;
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bufferEqual = buffer;
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}
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else
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{
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indexBufferUnEqual = index;
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bufferUnEqual = buffer;
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}
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}
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var twoParts = new RunLengthTwoParts { Buffer1 = new byte[indexBufferEqual] };
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Buffer.BlockCopy(bufferEqual, 0, twoParts.Buffer1, 0, indexBufferEqual);
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twoParts.Buffer2 = new byte[indexBufferUnEqual + 2];
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Buffer.BlockCopy(bufferUnEqual, 0, twoParts.Buffer2, 0, indexBufferUnEqual);
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return twoParts;
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}
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private static void WriteRle(ref bool indexHalfNibble, int lastColor, int count, ref int index, byte[] buffer)
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{
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if (count <= Helper.B00000011) // 1-3 repetitions
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{
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WriteOneNibble(buffer, count, lastColor, ref index, ref indexHalfNibble);
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}
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else if (count <= Helper.B00001111) // 4-15 repetitions
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{
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WriteTwoNibbles(buffer, count, lastColor, ref index, indexHalfNibble);
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}
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else if (count <= Helper.B00111111) // 4-15 repetitions
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{
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WriteThreeNibbles(buffer, count, lastColor, ref index, ref indexHalfNibble); // 16-63 repetitions
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}
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else // 64-255 repetitions
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{
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int factor = count / 255;
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for (int i = 0; i < factor; i++)
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WriteFourNibbles(buffer, 0xff, lastColor, ref index, indexHalfNibble);
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int rest = count % 255;
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if (rest > 0)
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WriteFourNibbles(buffer, rest, lastColor, ref index, indexHalfNibble);
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}
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}
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private static void WriteFourNibbles(byte[] buffer, int count, int color, ref int index, bool indexHalfNibble)
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{
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int n = (count << 2) + color;
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if (indexHalfNibble)
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{
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index++;
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var firstNibble = (byte)(n >> 4);
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buffer[index] = firstNibble;
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index++;
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var secondNibble = (byte)((n & Helper.B00001111) << 4);
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buffer[index] = secondNibble;
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}
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else
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{
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var firstNibble = (byte)(n >> 8);
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buffer[index] = firstNibble;
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index++;
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var secondNibble = (byte)(n & Helper.B11111111);
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buffer[index] = secondNibble;
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index++;
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}
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}
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private static void WriteThreeNibbles(byte[] buffer, int count, int color, ref int index, ref bool indexHalfNibble)
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{
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//Value Bits n=length, c=color
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//16-63 12 0 0 0 0 n n n n n n c c (one and a half byte)
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var n = (ushort)((count << 2) + color);
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if (indexHalfNibble)
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{
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index++; // there should already zeroes in last nibble
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buffer[index] = (byte)n;
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index++;
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}
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else
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{
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buffer[index] = (byte)(n >> 4);
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index++;
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buffer[index] = (byte)((n & Helper.B00011111) << 4);
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}
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indexHalfNibble = !indexHalfNibble;
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}
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private static void WriteTwoNibbles(byte[] buffer, int count, int color, ref int index, bool indexHalfNibble)
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{
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//Value Bits n=length, c=color
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//4-15 8 0 0 n n n n c c (one byte)
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var n = (byte)((count << 2) + color);
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if (indexHalfNibble)
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{
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var firstNibble = (byte)(n >> 4);
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buffer[index] = (byte)(buffer[index] | firstNibble);
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var secondNibble = (byte)((n & Helper.B00001111) << 4);
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index++;
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buffer[index] = secondNibble;
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}
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else
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{
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|
buffer[index] = n;
|
|
index++;
|
|
}
|
|
}
|
|
|
|
private static void WriteOneNibble(byte[] buffer, int count, int color, ref int index, ref bool indexHalfNibble)
|
|
{
|
|
var n = (byte)((count << 2) + color);
|
|
if (indexHalfNibble)
|
|
{
|
|
buffer[index] = (byte)(buffer[index] | n);
|
|
index++;
|
|
}
|
|
else
|
|
{
|
|
buffer[index] = (byte)(n << 4);
|
|
}
|
|
indexHalfNibble = !indexHalfNibble;
|
|
}
|
|
|
|
private int GetDvdColor(byte[] pattern, byte[] emphasis1, byte[] emphasis2)
|
|
{
|
|
_pixelAddress += 4;
|
|
int a = _bitmapData[_pixelAddress + 3];
|
|
int r = _bitmapData[_pixelAddress + 2];
|
|
int g = _bitmapData[_pixelAddress + 1];
|
|
int b = _bitmapData[_pixelAddress];
|
|
|
|
if (pattern[0] == b && pattern[1] == g && pattern[2] == r && pattern[3] == a)
|
|
return 1;
|
|
if (emphasis1[0] == b && emphasis1[1] == g && emphasis1[2] == r && emphasis1[3] == a)
|
|
return 2;
|
|
if (emphasis2[0] == b && emphasis2[1] == g && emphasis2[2] == r && emphasis2[3] == a)
|
|
return 3;
|
|
return 0;
|
|
}
|
|
|
|
public void CropTransparentSidesAndBottom(int maximumCropping, bool bottom)
|
|
{
|
|
int leftStart = 0;
|
|
bool done = false;
|
|
int x = 0;
|
|
int y;
|
|
while (!done && x < Width)
|
|
{
|
|
y = 0;
|
|
while (!done && y < Height)
|
|
{
|
|
int alpha = GetAlpha(x, y);
|
|
if (alpha != 0)
|
|
{
|
|
done = true;
|
|
leftStart = x;
|
|
leftStart -= maximumCropping;
|
|
if (leftStart < 0)
|
|
leftStart = 0;
|
|
}
|
|
y++;
|
|
}
|
|
x++;
|
|
}
|
|
|
|
int rightEnd = Width - 1;
|
|
done = false;
|
|
x = Width - 1;
|
|
while (!done && x >= 0)
|
|
{
|
|
y = 0;
|
|
while (!done && y < Height)
|
|
{
|
|
int alpha = GetAlpha(x, y);
|
|
if (alpha != 0)
|
|
{
|
|
done = true;
|
|
rightEnd = x;
|
|
rightEnd += maximumCropping;
|
|
if (rightEnd >= Width)
|
|
rightEnd = Width - 1;
|
|
}
|
|
y++;
|
|
}
|
|
x--;
|
|
}
|
|
|
|
//crop bottom
|
|
done = false;
|
|
int newHeight = Height;
|
|
if (bottom)
|
|
{
|
|
y = Height - 1;
|
|
while (!done && y > 0)
|
|
{
|
|
x = 0;
|
|
while (!done && x < Width)
|
|
{
|
|
int alpha = GetAlpha(x, y);
|
|
if (alpha != 0)
|
|
{
|
|
done = true;
|
|
newHeight = y + maximumCropping + 1;
|
|
if (newHeight > Height)
|
|
newHeight = Height;
|
|
}
|
|
x++;
|
|
}
|
|
y--;
|
|
}
|
|
}
|
|
|
|
if (leftStart < 2 && rightEnd >= Width - 3)
|
|
return;
|
|
|
|
int newWidth = rightEnd - leftStart + 1;
|
|
if (newWidth <= 0)
|
|
return;
|
|
|
|
var newBitmapData = new byte[newWidth * newHeight * 4];
|
|
int index = 0;
|
|
for (y = 0; y < newHeight; y++)
|
|
{
|
|
int pixelAddress = (leftStart * 4) + (y * 4 * Width);
|
|
Buffer.BlockCopy(_bitmapData, pixelAddress, newBitmapData, index, 4 * newWidth);
|
|
index += 4 * newWidth;
|
|
}
|
|
Width = newWidth;
|
|
Height = newHeight;
|
|
_bitmapData = newBitmapData;
|
|
}
|
|
|
|
public void CropSidesAndBottom(int maximumCropping, Color transparentColor, bool bottom)
|
|
{
|
|
int leftStart = 0;
|
|
bool done = false;
|
|
int x = 0;
|
|
int y;
|
|
while (!done && x < Width)
|
|
{
|
|
y = 0;
|
|
while (!done && y < Height)
|
|
{
|
|
Color c = GetPixel(x, y);
|
|
if (c != transparentColor)
|
|
{
|
|
done = true;
|
|
leftStart = x;
|
|
leftStart -= maximumCropping;
|
|
if (leftStart < 0)
|
|
leftStart = 0;
|
|
}
|
|
y++;
|
|
}
|
|
x++;
|
|
}
|
|
|
|
int rightEnd = Width - 1;
|
|
done = false;
|
|
x = Width - 1;
|
|
while (!done && x >= 0)
|
|
{
|
|
y = 0;
|
|
while (!done && y < Height)
|
|
{
|
|
Color c = GetPixel(x, y);
|
|
if (c != transparentColor)
|
|
{
|
|
done = true;
|
|
rightEnd = x;
|
|
rightEnd += maximumCropping;
|
|
if (rightEnd >= Width)
|
|
rightEnd = Width - 1;
|
|
}
|
|
y++;
|
|
}
|
|
x--;
|
|
}
|
|
|
|
//crop bottom
|
|
done = false;
|
|
int newHeight = Height;
|
|
if (bottom)
|
|
{
|
|
y = Height - 1;
|
|
while (!done && y > 0)
|
|
{
|
|
x = 0;
|
|
while (!done && x < Width)
|
|
{
|
|
Color c = GetPixel(x, y);
|
|
if (c != transparentColor)
|
|
{
|
|
done = true;
|
|
newHeight = y + maximumCropping;
|
|
if (newHeight > Height)
|
|
newHeight = Height;
|
|
}
|
|
x++;
|
|
}
|
|
y--;
|
|
}
|
|
}
|
|
|
|
if (leftStart < 2 && rightEnd >= Width - 3)
|
|
return;
|
|
|
|
int newWidth = rightEnd - leftStart + 1;
|
|
if (newWidth <= 0)
|
|
return;
|
|
|
|
var newBitmapData = new byte[newWidth * newHeight * 4];
|
|
int index = 0;
|
|
for (y = 0; y < newHeight; y++)
|
|
{
|
|
int pixelAddress = (leftStart * 4) + (y * 4 * Width);
|
|
Buffer.BlockCopy(_bitmapData, pixelAddress, newBitmapData, index, 4 * newWidth);
|
|
index += 4 * newWidth;
|
|
}
|
|
Width = newWidth;
|
|
Height = newHeight;
|
|
_bitmapData = newBitmapData;
|
|
}
|
|
|
|
public void CropTop(int maximumCropping, Color transparentColor)
|
|
{
|
|
bool done = false;
|
|
int newTop = 0;
|
|
int y = 0;
|
|
while (!done && y < Height)
|
|
{
|
|
var x = 0;
|
|
while (!done && x < Width)
|
|
{
|
|
Color c = GetPixel(x, y);
|
|
if (c != transparentColor && !(c.A == 0 && transparentColor.A == 0))
|
|
{
|
|
done = true;
|
|
newTop = y - maximumCropping;
|
|
if (newTop < 0)
|
|
newTop = 0;
|
|
}
|
|
x++;
|
|
}
|
|
y++;
|
|
}
|
|
|
|
if (newTop == 0)
|
|
return;
|
|
|
|
int newHeight = Height - newTop;
|
|
var newBitmapData = new byte[Width * newHeight * 4];
|
|
int index = 0;
|
|
for (y = newTop; y < Height; y++)
|
|
{
|
|
int pixelAddress = y * 4 * Width;
|
|
Buffer.BlockCopy(_bitmapData, pixelAddress, newBitmapData, index, 4 * Width);
|
|
index += 4 * Width;
|
|
}
|
|
Height = newHeight;
|
|
_bitmapData = newBitmapData;
|
|
}
|
|
|
|
public int CropTopTransparent(int maximumCropping)
|
|
{
|
|
bool done = false;
|
|
int newTop = 0;
|
|
int y = 0;
|
|
while (!done && y < Height)
|
|
{
|
|
var x = 0;
|
|
while (!done && x < Width)
|
|
{
|
|
int alpha = GetAlpha(x, y);
|
|
if (alpha > 10)
|
|
{
|
|
done = true;
|
|
newTop = y - maximumCropping;
|
|
if (newTop < 0)
|
|
newTop = 0;
|
|
}
|
|
x++;
|
|
}
|
|
y++;
|
|
}
|
|
|
|
if (newTop == 0)
|
|
return 0;
|
|
|
|
int newHeight = Height - newTop;
|
|
var newBitmapData = new byte[Width * newHeight * 4];
|
|
int index = 0;
|
|
for (y = newTop; y < Height; y++)
|
|
{
|
|
int pixelAddress = y * 4 * Width;
|
|
Buffer.BlockCopy(_bitmapData, pixelAddress, newBitmapData, index, 4 * Width);
|
|
index += 4 * Width;
|
|
}
|
|
Height = newHeight;
|
|
_bitmapData = newBitmapData;
|
|
return newTop;
|
|
}
|
|
|
|
public void Fill(Color color)
|
|
{
|
|
var buffer = new byte[4];
|
|
buffer[0] = color.B;
|
|
buffer[1] = color.G;
|
|
buffer[2] = color.R;
|
|
buffer[3] = color.A;
|
|
for (int i = 0; i < _bitmapData.Length; i += 4)
|
|
Buffer.BlockCopy(buffer, 0, _bitmapData, i, 4);
|
|
}
|
|
|
|
public int GetAlpha(int x, int y)
|
|
{
|
|
return _bitmapData[(x * 4) + (y * 4 * Width) + 3];
|
|
}
|
|
|
|
public Color GetPixel(int x, int y)
|
|
{
|
|
_pixelAddress = (x * 4) + (y * 4 * Width);
|
|
return Color.FromArgb(_bitmapData[_pixelAddress + 3], _bitmapData[_pixelAddress + 2], _bitmapData[_pixelAddress + 1], _bitmapData[_pixelAddress]);
|
|
}
|
|
|
|
public byte[] GetPixelColors(int x, int y)
|
|
{
|
|
_pixelAddress = (x * 4) + (y * 4 * Width);
|
|
return new[] { _bitmapData[_pixelAddress + 3], _bitmapData[_pixelAddress + 2], _bitmapData[_pixelAddress + 1], _bitmapData[_pixelAddress] };
|
|
}
|
|
|
|
public Color GetPixelNext()
|
|
{
|
|
_pixelAddress += 4;
|
|
return Color.FromArgb(_bitmapData[_pixelAddress + 3], _bitmapData[_pixelAddress + 2], _bitmapData[_pixelAddress + 1], _bitmapData[_pixelAddress]);
|
|
}
|
|
|
|
public void SetPixel(int x, int y, Color color)
|
|
{
|
|
_pixelAddress = (x * 4) + (y * 4 * Width);
|
|
_bitmapData[_pixelAddress] = color.B;
|
|
_bitmapData[_pixelAddress + 1] = color.G;
|
|
_bitmapData[_pixelAddress + 2] = color.R;
|
|
_bitmapData[_pixelAddress + 3] = color.A;
|
|
}
|
|
|
|
public void SetPixelNext(Color color)
|
|
{
|
|
_pixelAddress += 4;
|
|
_bitmapData[_pixelAddress] = color.B;
|
|
_bitmapData[_pixelAddress + 1] = color.G;
|
|
_bitmapData[_pixelAddress + 2] = color.R;
|
|
_bitmapData[_pixelAddress + 3] = color.A;
|
|
}
|
|
|
|
public Bitmap GetBitmap()
|
|
{
|
|
var bitmap = new Bitmap(Width, Height, PixelFormat.Format32bppArgb);
|
|
BitmapData bitmapdata = bitmap.LockBits(new Rectangle(0, 0, Width, Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
|
|
IntPtr destination = bitmapdata.Scan0;
|
|
Marshal.Copy(_bitmapData, 0, destination, _bitmapData.Length);
|
|
bitmap.UnlockBits(bitmapdata);
|
|
return bitmap;
|
|
}
|
|
|
|
private static int FindBestMatch(Color color, List<Color> palette, out int maxDiff)
|
|
{
|
|
int smallestDiff = 1000;
|
|
int smallestDiffIndex = -1;
|
|
int i = 0;
|
|
foreach (var pc in palette)
|
|
{
|
|
int diff = Math.Abs(pc.A - color.A) + Math.Abs(pc.R - color.R) + Math.Abs(pc.G - color.G) + Math.Abs(pc.B - color.B);
|
|
if (diff < smallestDiff)
|
|
{
|
|
smallestDiff = diff;
|
|
smallestDiffIndex = i;
|
|
if (smallestDiff < 4)
|
|
{
|
|
maxDiff = smallestDiff;
|
|
return smallestDiffIndex;
|
|
}
|
|
}
|
|
i++;
|
|
}
|
|
maxDiff = smallestDiff;
|
|
return smallestDiffIndex;
|
|
}
|
|
|
|
public Bitmap ConverTo8BitsPerPixel()
|
|
{
|
|
var newBitmap = new Bitmap(Width, Height, PixelFormat.Format8bppIndexed);
|
|
var palette = new List<Color> { Color.Transparent };
|
|
ColorPalette bPalette = newBitmap.Palette;
|
|
var entries = bPalette.Entries;
|
|
for (int i = 0; i < newBitmap.Palette.Entries.Length; i++)
|
|
entries[i] = Color.Transparent;
|
|
|
|
BitmapData data = newBitmap.LockBits(new Rectangle(0, 0, Width, Height), ImageLockMode.WriteOnly, PixelFormat.Format8bppIndexed);
|
|
var bytes = new byte[data.Height * data.Stride];
|
|
Marshal.Copy(data.Scan0, bytes, 0, bytes.Length);
|
|
|
|
for (int y = 0; y < Height; y++)
|
|
{
|
|
for (int x = 0; x < Width; x++)
|
|
{
|
|
Color c = GetPixel(x, y);
|
|
if (c.A < 5)
|
|
{
|
|
bytes[y * data.Stride + x] = 0;
|
|
}
|
|
else
|
|
{
|
|
int maxDiff;
|
|
int index = FindBestMatch(c, palette, out maxDiff);
|
|
|
|
if (index == -1 && palette.Count < 255)
|
|
{
|
|
index = palette.Count;
|
|
entries[index] = c;
|
|
palette.Add(c);
|
|
bytes[y * data.Stride + x] = (byte)index;
|
|
}
|
|
else if (palette.Count < 200 && maxDiff > 5)
|
|
{
|
|
index = palette.Count;
|
|
entries[index] = c;
|
|
palette.Add(c);
|
|
bytes[y * data.Stride + x] = (byte)index;
|
|
}
|
|
else if (palette.Count < 255 && maxDiff > 15)
|
|
{
|
|
index = palette.Count;
|
|
entries[index] = c;
|
|
palette.Add(c);
|
|
bytes[y * data.Stride + x] = (byte)index;
|
|
}
|
|
else if (index >= 0)
|
|
{
|
|
bytes[y * data.Stride + x] = (byte)index;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
Marshal.Copy(bytes, 0, data.Scan0, bytes.Length);
|
|
newBitmap.UnlockBits(data);
|
|
newBitmap.Palette = bPalette;
|
|
return newBitmap;
|
|
}
|
|
|
|
public NikseBitmap CopyRectangle(Rectangle section)
|
|
{
|
|
if (section.Bottom > Height)
|
|
section = new Rectangle(section.Left, section.Top, section.Width, Height - section.Top);
|
|
if (section.Width + section.Left > Width)
|
|
section = new Rectangle(section.Left, section.Top, Width - section.Left, section.Height);
|
|
var newBitmapData = new byte[section.Width * section.Height * 4];
|
|
int index = 0;
|
|
for (int y = section.Top; y < section.Bottom; y++)
|
|
{
|
|
int pixelAddress = (section.Left * 4) + (y * 4 * Width);
|
|
Buffer.BlockCopy(_bitmapData, pixelAddress, newBitmapData, index, 4 * section.Width);
|
|
index += 4 * section.Width;
|
|
}
|
|
return new NikseBitmap(section.Width, section.Height, newBitmapData);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns brightest color (not white though)
|
|
/// </summary>
|
|
/// <returns>Brightest color, if not found or if brightes color is white, then Color.Transparent is returned</returns>
|
|
public Color GetBrightestColor()
|
|
{
|
|
int max = Width * Height - 4;
|
|
Color brightest = Color.Black;
|
|
for (int i = 0; i < max; i++)
|
|
{
|
|
Color c = GetPixelNext();
|
|
if (c.A > 220 && c.R + c.G + c.B > 200 && c.R + c.G + c.B > brightest.R + brightest.G + brightest.B)
|
|
brightest = c;
|
|
}
|
|
if (IsColorClose(Color.White, brightest, 40))
|
|
return Color.Transparent;
|
|
if (IsColorClose(Color.Black, brightest, 10))
|
|
return Color.Transparent;
|
|
return brightest;
|
|
}
|
|
|
|
private static bool IsColorClose(Color color1, Color color2, int maxDiff)
|
|
{
|
|
if (Math.Abs(color1.R - color2.R) < maxDiff && Math.Abs(color1.G - color2.G) < maxDiff && Math.Abs(color1.B - color2.B) < maxDiff)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
public void GrayScale()
|
|
{
|
|
for (int i = 0; i < _bitmapData.Length; i += 4)
|
|
{
|
|
int medium = Convert.ToInt32((_bitmapData[i + 2] + _bitmapData[i + 1] + _bitmapData[i]) * 1.5 / 3.0 + 2);
|
|
if (medium > byte.MaxValue)
|
|
medium = byte.MaxValue;
|
|
_bitmapData[i + 2] = _bitmapData[i + 1] = _bitmapData[i] = (byte)medium;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Make pixels with some transparency completely transparent
|
|
/// </summary>
|
|
/// <param name="minAlpha">Min alpha value, 0=transparent, 255=fully visible</param>
|
|
public void MakeBackgroundTransparent(int minAlpha)
|
|
{
|
|
var buffer = new byte[4];
|
|
buffer[0] = 0; // B
|
|
buffer[1] = 0; // G
|
|
buffer[2] = 0; // R
|
|
buffer[3] = 0; // A
|
|
for (int i = 0; i < _bitmapData.Length; i += 4)
|
|
{
|
|
if (_bitmapData[i + 3] < minAlpha)
|
|
Buffer.BlockCopy(buffer, 0, _bitmapData, i, 4);
|
|
}
|
|
}
|
|
|
|
public void MakeTwoColor(int minRgb)
|
|
{
|
|
var buffer = new byte[4];
|
|
buffer[0] = 0; // B
|
|
buffer[1] = 0; // G
|
|
buffer[2] = 0; // R
|
|
buffer[3] = 0; // A
|
|
var bufferWhite = new byte[4];
|
|
bufferWhite[0] = 255; // B
|
|
bufferWhite[1] = 255; // G
|
|
bufferWhite[2] = 255; // R
|
|
bufferWhite[3] = 255; // A
|
|
for (int i = 0; i < _bitmapData.Length; i += 4)
|
|
{
|
|
if (_bitmapData[i + 3] < 1 || (_bitmapData[i + 0] + _bitmapData[i + 1] + _bitmapData[i + 2] < minRgb))
|
|
Buffer.BlockCopy(buffer, 0, _bitmapData, i, 4);
|
|
else
|
|
Buffer.BlockCopy(bufferWhite, 0, _bitmapData, i, 4);
|
|
}
|
|
}
|
|
|
|
public void MakeVerticalLinePartTransparent(int xStart, int xEnd, int y)
|
|
{
|
|
if (xEnd > Width - 1)
|
|
xEnd = Width - 1;
|
|
if (xStart < 0)
|
|
xStart = 0;
|
|
|
|
int i = (xStart * 4) + (y * 4 * Width);
|
|
int end = (xEnd * 4) + (y * 4 * Width) + 4;
|
|
while (i < end)
|
|
{
|
|
_bitmapData[i] = 0;
|
|
i++;
|
|
}
|
|
}
|
|
|
|
public void AddTransparentLineRight()
|
|
{
|
|
int newWidth = Width + 1;
|
|
|
|
var newBitmapData = new byte[newWidth * Height * 4];
|
|
int index = 0;
|
|
for (int y = 0; y < Height; y++)
|
|
{
|
|
int pixelAddress = (0 * 4) + (y * 4 * Width);
|
|
Buffer.BlockCopy(_bitmapData, pixelAddress, newBitmapData, index, 4 * Width);
|
|
index += 4 * newWidth;
|
|
}
|
|
Width = newWidth;
|
|
_bitmapData = newBitmapData;
|
|
for (int y = 0; y < Height; y++)
|
|
{
|
|
SetPixel(Width - 1, y, Color.Transparent);
|
|
}
|
|
}
|
|
|
|
public void SaveAsTarga(string fileName)
|
|
{
|
|
// TGA header (18-byte fixed header)
|
|
byte[] header =
|
|
{
|
|
0, // ID length (1 bytes)
|
|
0, // no color map (1 bytes)
|
|
2, // uncompressed, true color (1 bytes)
|
|
0, 0, // Color map First Entry Index
|
|
0, 0, // Color map Length
|
|
0, // Color map Entry Size
|
|
0, 0, 0, 0, // x and y origin
|
|
(byte)(Width & 0x00FF),
|
|
(byte)((Width & 0xFF00) >> 8),
|
|
(byte)(Height & 0x00FF),
|
|
(byte)((Height & 0xFF00) >> 8),
|
|
32, // pixel depth - 32=32 bit bitmap
|
|
0 // Image Descriptor
|
|
};
|
|
|
|
var pixels = new byte[_bitmapData.Length];
|
|
int offsetDest = 0;
|
|
for (int y = Height-1; y >= 0; y--) // takes lines from bottom lines to top (mirrowed horizontally)
|
|
{
|
|
for (int x = 0; x < Width; x++)
|
|
{
|
|
var c = GetPixel(x, y);
|
|
pixels[offsetDest] = c.B;
|
|
pixels[offsetDest + 1] = c.G;
|
|
pixels[offsetDest + 2] = c.R;
|
|
pixels[offsetDest + 3] = c.A;
|
|
offsetDest += 4;
|
|
}
|
|
}
|
|
|
|
using (var fileStream = File.Create(fileName))
|
|
{
|
|
fileStream.Write(header, 0, header.Length);
|
|
fileStream.Write(pixels, 0, pixels.Length);
|
|
}
|
|
}
|
|
|
|
}
|
|
} |