Roblox backend: window content in its own clipped layer at the scroll origin (scrolling moves pixels instead of redrawing), 128px tiles

2026-10-08 11:52:42 -05:00
parent c4816a4237
commit b19fe61236
6 changed files with 499 additions and 312 deletions
@@ -7150,6 +7150,10 @@ function ImGui.Begin(name, open, flags)

    if bit32.band(flags, ImGuiWindowFlags.DockNodeHost) == 0 and not window.SkipRefresh then
        ImGui.PushClipRect(window.InnerClipRect.Min, window.InnerClipRect.Max, true)
+        -- [Roblox backend] content clip + scroll origin: lets the backend move scrolled content instead of redrawing it
+        local dl, cr = window.DrawList, window.DrawList._CmdHeader.ClipRect
+        dl._ContentClipX0, dl._ContentClipY0, dl._ContentClipX1, dl._ContentClipY1 = cr.x, cr.y, cr.z, cr.w
+        dl._ScrollOriginX, dl._ScrollOriginY = window.Pos.x - window.Scroll.x, window.Pos.y - window.Scroll.y
    end

    window.WriteAccessed = false