Display a message when we can't debug a pixel shader and show a history

qrenderdoc/Windows/TextureViewer.cpp

@@ -4145,7 +4145,7 @@ void TextureViewer::on_debugPixelContext_clicked()
   if(!trace)
   {
     if(m_Ctx.APIProps().pixelHistory)
-      on_pixelHistory_clicked();
+      ShowPixelHistory(true);
     else
       RDDialog::critical(this, tr("Debug Error"), tr("Error debugging pixel."));
     return;
@@ -4162,6 +4162,11 @@ void TextureViewer::on_debugPixelContext_clicked()
 }
 
 void TextureViewer::on_pixelHistory_clicked()
+{
+  ShowPixelHistory(false);
+}
+
+void TextureViewer::ShowPixelHistory(bool failedDebug)
 {
   TextureDescription *texptr = GetCurrentTexture();
 
@@ -4181,6 +4186,9 @@ void TextureViewer::on_pixelHistory_clicked()
   uint32_t view = m_TexDisplay.subresource.slice - m_Following.GetFirstArraySlice(m_Ctx);
   IPixelHistoryView *hist = m_Ctx.ViewPixelHistory(texptr->resourceId, x, y, view, m_TexDisplay);
 
+  if(failedDebug)
+    hist->SetFailedDebug();
+
   m_Ctx.AddDockWindow(hist->Widget(), DockReference::TransientPopupArea, this, 0.3f);
 
   // we use this pointer to ensure that the history viewer is still visible (and hasn't been closed)