67 lines
2.4 KiB
C#
67 lines
2.4 KiB
C#
using UnityEngine;
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namespace Darkmatter.Fonepay
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{
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/// <summary>
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/// Pure C# QR Code generator. Byte mode, ECC L/M/Q/H, versions 1–10.
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/// </summary>
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public static partial class FonepayQRGenerator
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{
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public enum EccLevel { L, M, Q, H }
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public static Texture2D GenerateTexture(string text, int pixelSize = 10,
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EccLevel ecc = EccLevel.M, Color? darkColor = null, Color? lightColor = null)
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{
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bool[,] matrix = GenerateMatrix(text, ecc);
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int size = matrix.GetLength(0);
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int texSize = size * pixelSize;
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var tex = new Texture2D(texSize, texSize, TextureFormat.RGBA32, false)
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{
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filterMode = FilterMode.Point,
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wrapMode = TextureWrapMode.Clamp
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};
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Color dark = darkColor ?? Color.black;
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Color light = lightColor ?? Color.white;
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for (int row = 0; row < size; row++)
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for (int col = 0; col < size; col++)
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{
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Color c = matrix[row, col] ? dark : light;
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for (int py = 0; py < pixelSize; py++)
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for (int px = 0; px < pixelSize; px++)
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tex.SetPixel(col * pixelSize + px,
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(size - 1 - row) * pixelSize + py, c);
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}
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tex.Apply();
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return tex;
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}
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public static Sprite GenerateSprite(string text, int pixelSize = 10,
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EccLevel ecc = EccLevel.M, Color? darkColor = null, Color? lightColor = null,
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float pixelsPerUnit = 100f)
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{
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var tex = GenerateTexture(text, pixelSize, ecc, darkColor, lightColor);
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var sprite = Sprite.Create(tex,
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new Rect(0, 0, tex.width, tex.height),
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new Vector2(0.5f, 0.5f),
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pixelsPerUnit,
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0, SpriteMeshType.FullRect);
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sprite.name = "FonepayQR";
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return sprite;
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}
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public static bool[,] GenerateMatrix(string text, EccLevel ecc = EccLevel.M)
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{
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if (string.IsNullOrEmpty(text))
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throw new System.ArgumentException("QR text must be non-empty", nameof(text));
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byte[] data = System.Text.Encoding.UTF8.GetBytes(text);
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var (version, ecBlocks) = ChooseVersion(data.Length, ecc);
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byte[] codewords = BuildCodewords(data, version, ecc, ecBlocks);
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return BuildMatrix(version, codewords);
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}
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}
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}
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