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Roblox backend: optional SetBusyRenderRate (lower redraw rate while scrolling/resizing/moving)

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4DBug
2026-10-08 11:43:31 -05:00
parent ab108d288b
commit c4816a4237
4 changed files with 47 additions and 7 deletions
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build/ImGui.linemap.json
+1 -1
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@@ -1 +1 @@
[[12, "imgui.lua"], [13795, "imgui_demo.lua"], [14728, "imgui_demo_2.lua"], [17803, "imgui_demo_apps.lua"], [19062, "imgui_demo_tools.lua"], [20388, "imgui_demo_widgets.lua"], [22312, "imgui_docking.lua"], [25440, "imgui_dragdrop.lua"], [25732, "imgui_draw.lua"], [30979, "imgui_h.lua"], [33153, "imgui_impl_roblox.lua"], [34121, "imgui_impl_roblox_fonts.lua"], [40524, "imgui_internal.lua"], [43696, "imgui_tables.lua"], [48043, "imgui_tabs.lua"], [49210, "imgui_widgets.lua"], [57744, "imstb_rectpack.lua"], [58190, "imstb_textedit.lua"], [59431, "imstb_truetype.lua"], [61899, "imstd_minstdio.lua"]]
[[12, "imgui.lua"], [13795, "imgui_demo.lua"], [14728, "imgui_demo_2.lua"], [17803, "imgui_demo_apps.lua"], [19062, "imgui_demo_tools.lua"], [20388, "imgui_demo_widgets.lua"], [22312, "imgui_docking.lua"], [25440, "imgui_dragdrop.lua"], [25732, "imgui_draw.lua"], [30979, "imgui_h.lua"], [33153, "imgui_impl_roblox.lua"], [34140, "imgui_impl_roblox_fonts.lua"], [40543, "imgui_internal.lua"], [43715, "imgui_tables.lua"], [48062, "imgui_tabs.lua"], [49229, "imgui_widgets.lua"], [57763, "imstb_rectpack.lua"], [58209, "imstb_textedit.lua"], [59450, "imstb_truetype.lua"], [61918, "imstd_minstdio.lua"]]
build/ImGui.luau
+23 -3
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@@ -33718,10 +33718,23 @@ function ImGui_ImplRoblox_RenderDrawData(draw_data)
PE()
-- Render rate cap: textures are always updated (imgui expects it), tiles only at bd.RenderRate Hz
if bd.RenderRate > 0 then
-- Optional lower cap while scrolling / resizing / moving a window (SetBusyRenderRate, off by default)
local rate = bd.RenderRate
if bd.BusyRenderRate > 0 then
local g = ImGui.GetCurrentContext()
local busy = g.WheelingWindow ~= nil or g.MovingWindow ~= nil -- (io.MouseWheel is already cleared by EndFrame)
if not busy and g.ActiveId ~= 0 then
local w = g.ActiveIdWindow
local cur = g.MouseCursor -- ResizeAll..ResizeNWSE while a resize grip/border is held
busy = (cur >= ImGuiMouseCursor.ResizeAll and cur <= ImGuiMouseCursor.ResizeNWSE)
or (w ~= nil and (g.ActiveId == ImGui.GetWindowScrollbarID(w, ImGuiAxis.X) or g.ActiveId == ImGui.GetWindowScrollbarID(w, ImGuiAxis.Y)))
end
if busy and (rate <= 0 or bd.BusyRenderRate < rate) then rate = bd.BusyRenderRate end
end
if rate > 0 then
local now = os.clock()
if now + 0.002 < bd.NextRender then PE(); return end
bd.NextRender = math.max(bd.NextRender + 1 / bd.RenderRate, now)
bd.NextRender = math.max(bd.NextRender + 1 / rate, now)
end
local sw, sh = floor(draw_data.DisplaySize.x), floor(draw_data.DisplaySize.y)
@@ -33980,7 +33993,7 @@ function ImGui_ImplRoblox_Init(parent, render_scale)
local bd = {
Time = os.clock(), Gui = gui, Connections = {},
Textures = {}, TextureCount = 0, MouseX = -1, MouseY = -1,
Layers = {}, FrameNo = 0, Scale = render_scale or 1, TilesActive = false, RenderRate = 60, NextRender = 0, LastPrimCount = 0, ForceRedraw = true,
Layers = {}, FrameNo = 0, Scale = render_scale or 1, TilesActive = false, RenderRate = 60, BusyRenderRate = 0, NextRender = 0, LastPrimCount = 0, ForceRedraw = true,
}
io.BackendPlatformUserData = bd
@@ -34090,6 +34103,11 @@ function ImGui_ImplRoblox_SetRenderRate(hz)
ImGui_ImplRoblox_GetBackendData().RenderRate = hz or 0
end
--- Optional: max tile redraws per second while scrolling, resizing or moving a window (0 = off, the default)
function ImGui_ImplRoblox_SetBusyRenderRate(hz)
ImGui_ImplRoblox_GetBackendData().BusyRenderRate = hz or 0
end
--- Toggle MicroProfiler labels (debug.profilebegin) for the backend
function ImGui_ImplRoblox_SetProfiling(enabled) profiling = enabled and true or false end
local function ImGui_ImplRoblox_IsProfiling() return profiling end
@@ -34110,6 +34128,7 @@ ImGui_ImplRoblox = {
AddFile = ImGui_ImplRoblox_AddFile,
SetRenderScale = ImGui_ImplRoblox_SetRenderScale,
SetRenderRate = ImGui_ImplRoblox_SetRenderRate,
SetBusyRenderRate = ImGui_ImplRoblox_SetBusyRenderRate,
SetProfiling = ImGui_ImplRoblox_SetProfiling,
IsProfiling = ImGui_ImplRoblox_IsProfiling,
}
@@ -62511,6 +62530,7 @@ return {
ImGui_ImplRoblox_Init = ImGui_ImplRoblox_Init,
ImGui_ImplRoblox_NewFrame = ImGui_ImplRoblox_NewFrame,
ImGui_ImplRoblox_RenderDrawData = ImGui_ImplRoblox_RenderDrawData,
ImGui_ImplRoblox_SetBusyRenderRate = ImGui_ImplRoblox_SetBusyRenderRate,
ImGui_ImplRoblox_SetProfiling = ImGui_ImplRoblox_SetProfiling,
ImGui_ImplRoblox_SetRenderRate = ImGui_ImplRoblox_SetRenderRate,
ImGui_ImplRoblox_SetRenderScale = ImGui_ImplRoblox_SetRenderScale,
imgui/backend/imgui_impl_roblox.lua
+22 -3
View File
@@ -566,10 +566,23 @@ function ImGui_ImplRoblox_RenderDrawData(draw_data)
PE()
-- Render rate cap: textures are always updated (imgui expects it), tiles only at bd.RenderRate Hz
if bd.RenderRate > 0 then
-- Optional lower cap while scrolling / resizing / moving a window (SetBusyRenderRate, off by default)
local rate = bd.RenderRate
if bd.BusyRenderRate > 0 then
local g = ImGui.GetCurrentContext()
local busy = g.WheelingWindow ~= nil or g.MovingWindow ~= nil -- (io.MouseWheel is already cleared by EndFrame)
if not busy and g.ActiveId ~= 0 then
local w = g.ActiveIdWindow
local cur = g.MouseCursor -- ResizeAll..ResizeNWSE while a resize grip/border is held
busy = (cur >= ImGuiMouseCursor.ResizeAll and cur <= ImGuiMouseCursor.ResizeNWSE)
or (w ~= nil and (g.ActiveId == ImGui.GetWindowScrollbarID(w, ImGuiAxis.X) or g.ActiveId == ImGui.GetWindowScrollbarID(w, ImGuiAxis.Y)))
end
if busy and (rate <= 0 or bd.BusyRenderRate < rate) then rate = bd.BusyRenderRate end
end
if rate > 0 then
local now = os.clock()
if now + 0.002 < bd.NextRender then PE(); return end
bd.NextRender = math.max(bd.NextRender + 1 / bd.RenderRate, now)
bd.NextRender = math.max(bd.NextRender + 1 / rate, now)
end
local sw, sh = floor(draw_data.DisplaySize.x), floor(draw_data.DisplaySize.y)
@@ -828,7 +841,7 @@ function ImGui_ImplRoblox_Init(parent, render_scale)
local bd = {
Time = os.clock(), Gui = gui, Connections = {},
Textures = {}, TextureCount = 0, MouseX = -1, MouseY = -1,
Layers = {}, FrameNo = 0, Scale = render_scale or 1, TilesActive = false, RenderRate = 60, NextRender = 0, LastPrimCount = 0, ForceRedraw = true,
Layers = {}, FrameNo = 0, Scale = render_scale or 1, TilesActive = false, RenderRate = 60, BusyRenderRate = 0, NextRender = 0, LastPrimCount = 0, ForceRedraw = true,
}
io.BackendPlatformUserData = bd
@@ -938,6 +951,11 @@ function ImGui_ImplRoblox_SetRenderRate(hz)
ImGui_ImplRoblox_GetBackendData().RenderRate = hz or 0
end
--- Optional: max tile redraws per second while scrolling, resizing or moving a window (0 = off, the default)
function ImGui_ImplRoblox_SetBusyRenderRate(hz)
ImGui_ImplRoblox_GetBackendData().BusyRenderRate = hz or 0
end
--- Toggle MicroProfiler labels (debug.profilebegin) for the backend
function ImGui_ImplRoblox_SetProfiling(enabled) profiling = enabled and true or false end
local function ImGui_ImplRoblox_IsProfiling() return profiling end
@@ -958,6 +976,7 @@ ImGui_ImplRoblox = {
AddFile = ImGui_ImplRoblox_AddFile,
SetRenderScale = ImGui_ImplRoblox_SetRenderScale,
SetRenderRate = ImGui_ImplRoblox_SetRenderRate,
SetBusyRenderRate = ImGui_ImplRoblox_SetBusyRenderRate,
SetProfiling = ImGui_ImplRoblox_SetProfiling,
IsProfiling = ImGui_ImplRoblox_IsProfiling,
}
main.client.luau
+1
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@@ -75,6 +75,7 @@ end
ImGui_ImplRoblox.Init(nil, render_scale)
ImGui_ImplRoblox.SetRenderRate(60) -- tile redraws per second; imgui logic + your code still run every frame
-- ImGui_ImplRoblox.SetBusyRenderRate(30) -- optional: lower redraw rate while scrolling/resizing/moving windows
ImGui_ImplRoblox.SetProfiling(true) -- MicroProfiler (Ctrl+F6) labels; turn off when not profiling
local function P(name) if ImGui_ImplRoblox.IsProfiling() then debug.profilebegin(name) end end