private void DrawReadbackStat(ReadbackStat stat)
{
EditorGUILayout.Space();
EditorGUILayout.LabelField("Readback Stat: ");
EditorGUILayout.LabelField(string.Format(" Current Latency: {0} frame(s)", stat.CurrentLatency));
EditorGUILayout.LabelField(string.Format(" Average Latency: {0} frame(s)", stat.AverageLatency.ToString("N2")));
EditorGUILayout.LabelField(string.Format(" Max Latency : {0} frame(s)", stat.MaxLatency));
EditorGUILayout.LabelField(string.Format(" Fails : {0} time(s)", stat.FailedCount));
}
/// <summary>
/// 发起回读请求
/// </summary>
private void NewRequest(RenderTexture texture)
{
// 如果未完成的回读请求过多，就暂不生成新的请求
if (m_ReadbackRequests.Count > 8)
{
return;
}
// 缩放后的尺寸
var width = (int)(texture.width * m_ReadbackScale.ToFloat());
var height = (int)(texture.height * m_ReadbackScale.ToFloat());
// 先进行缩放
if (m_ReadbackScale != ScaleFactor.One)
{
if (m_DownScaleTexture == null || m_DownScaleTexture.width != width || m_DownScaleTexture.height != height)
{
m_DownScaleTexture = new RenderTexture(width, height, 0);
}
m_DownScaleTexture.DiscardContents();
Graphics.Blit(texture, m_DownScaleTexture, m_DownScaleMaterial, m_DownScaleMaterialPass);
texture = m_DownScaleTexture;
}
// 贴图尺寸检测
if (m_ReadbackTexture == null || m_ReadbackTexture.width != width || m_ReadbackTexture.height != height)
{
m_ReadbackTexture = new Texture2D(width, height, TextureFormat.RGBA32, false);
m_ReadbackTexture.filterMode = FilterMode.Point;
m_ReadbackTexture.wrapMode = TextureWrapMode.Clamp;
InitDebugTexture(width, height);
}
// 发起异步回读请求
var request = AsyncGPUReadback.Request(texture);
m_ReadbackRequests.Enqueue(request);
ReadbackStat.BeginRequest(request);
}
/// <summary>
/// 检测回读请求状态
/// </summary>
private void UpdateRequest()
{
UpdateStat.BeginFrame();
bool complete = false;
while (m_ReadbackRequests.Count > 0)
{
var req = m_ReadbackRequests.Peek();
if (req.hasError)
{
ReadbackStat.EndRequest(req, false);
m_ReadbackRequests.Dequeue();
}
else if (req.done)
{
// 更新数据并分发事件
m_ReadbackTexture.GetRawTextureData <Color32>().CopyFrom(req.GetData <Color32>());
complete = true;
ReadbackStat.EndRequest(req, true);
m_ReadbackRequests.Dequeue();
}
else
{
break;
}
}
if (complete)
{
UpdateStat.EndFrame();
OnFeedbackReadComplete?.Invoke(m_ReadbackTexture);
UpdateDebugTexture();
}
}
