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Optimization for printing tall images #205

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Optimization for printing tall images #205

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44 changes: 33 additions & 11 deletions ESCPOS_NET/Emitters/BaseCommandEmitter/ImageCommands.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,10 @@
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;

using System.Drawing;

using static System.Net.Mime.MediaTypeNames;

namespace ESCPOS_NET.Emitters
{
public abstract partial class BaseCommandEmitter : ICommandEmitter
Expand Down Expand Up @@ -40,6 +44,22 @@ public virtual byte[] SetImageDensity(bool isHiDPI)
}

public virtual byte[] BufferImage(byte[] image, int maxWidth = -1, bool isLegacy = false, int color = 1)
{
int width;
int height;
byte[] imageData;
using (var img = SixLabors.ImageSharp.Image.Load<Rgba32>(image))
{
imageData = img.ToSingleBitPixelByteArray(maxWidth: maxWidth == -1 ? (int?)null : maxWidth);
height = img.Height;
width = img.Width;
}

return BufferImageSingleBitPixelByteArray(imageData, width, height, isLegacy, color);
}

public virtual byte[] BufferImageSingleBitPixelByteArray(byte[] singleBitPixelByteArray,
int width, int height, bool isLegacy = false, int color = 1)
{
ByteArrayBuilder imageCommand = new ByteArrayBuilder();

Expand All @@ -57,16 +77,6 @@ public virtual byte[] BufferImage(byte[] image, int maxWidth = -1, bool isLegacy
break;
}

int width;
int height;
byte[] imageData;
using (var img = Image.Load<Rgba32>(image))
{
imageData = img.ToSingleBitPixelByteArray(maxWidth: maxWidth == -1 ? (int?)null : maxWidth);
height = img.Height;
width = img.Width;
}

byte heightL = (byte)height;
byte heightH = (byte)(height >> 8);

Expand All @@ -84,7 +94,7 @@ public virtual byte[] BufferImage(byte[] image, int maxWidth = -1, bool isLegacy
imageCommand.Append(new byte[] { 0x30, 0x70, 0x30, 0x01, 0x01, colorByte, widthL, widthH, heightL, heightH });
}

imageCommand.Append(imageData);
imageCommand.Append(singleBitPixelByteArray);

// Load image to print buffer
ByteArrayBuilder response = new ByteArrayBuilder();
Expand Down Expand Up @@ -119,5 +129,17 @@ public virtual byte[] PrintImage(byte[] image, bool isHiDPI, bool isLegacy = fal
return ByteSplicer.Combine(SetImageDensity(isHiDPI), BufferImage(image, maxWidth, isLegacy, color), WriteImageFromBuffer());
}
}

public virtual byte[] PrintImageSingleBitPixelByteArray(byte[] singleBitPixelByteArray, int width, int height, bool isHiDPI, bool isLegacy = false, int maxWidth = -1, int color = 1)
{
if (isLegacy)
{
return ByteSplicer.Combine(BufferImageSingleBitPixelByteArray(singleBitPixelByteArray, width, height, isLegacy));
}
else
{
return ByteSplicer.Combine(SetImageDensity(isHiDPI), BufferImageSingleBitPixelByteArray(singleBitPixelByteArray, width, height, isLegacy, color), WriteImageFromBuffer());
}
}
}
}