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using UdonSharp;
using UnityEngine;
using VRC.SDK3.Rendering;
using VRC.Udon.Common.Interfaces;
public class DataDecoder : UdonSharpBehaviour
{
public RenderTexture sourceTexture;
public int tileSize = 8;
public int tileToCheck = 0;
private Color32[] pixelData;
private bool hasData = false;
private int readWidth;
private int readHeight;
void Start() {}
void Update()
{
if (sourceTexture == null || tileSize <= 0) return;
// TODO get more than one column
int requestWidth = Mathf.Min(tileSize, sourceTexture.width);
int requestHeight = sourceTexture.height;
int pixelCount = requestWidth * requestHeight;
if (pixelCount <= 0) return;
if (pixelData == null || pixelCount != pixelData.Length)
{
pixelData = new Color32[pixelCount];
hasData = false;
}
readWidth = requestWidth;
readHeight = requestHeight;
VRCAsyncGPUReadback.Request(sourceTexture,
0,
0, readWidth,
0, readHeight,
0, 1,
(IUdonEventReceiver)this);
if (hasData)
{
ProcessTiles();
hasData = false;
}
}
public override void OnAsyncGpuReadbackComplete(VRCAsyncGPUReadbackRequest request)
{
if (request.hasError) return;
if (pixelData != null && request.TryGetData(pixelData))
{
hasData = true;
}
}
private void ProcessTiles()
{
if (pixelData == null || readWidth <= 0 || readHeight <= 0) return;
int tilesPerColumn = (int) Mathf.Floor(readHeight / tileSize);
GetTileRGB(tileToCheck, out int r, out int g, out int b);
Debug.Log($"Tile {tileToCheck}: R={r}, G={g}, B={b}");
}
private void GetTileRGB(int tileIndex, out int r, out int g, out int b)
{
r = 0;
g = 0;
b = 0;
int tileY = tileIndex * tileSize;
int centerY = tileY + tileSize / 2;
if (centerY >= readHeight) return;
int localX = readWidth / 2;
int localY = readHeight - 1 - centerY;
int index = localY * readWidth + localX;
if (index < 0 || index >= pixelData.Length) return;
Color32 c = pixelData[index];
r = c.r;
g = c.g;
b = c.b;
}
}
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