From 10e902ddcf38cd0c1c37f3f5bf1e7a156831dcb7 Mon Sep 17 00:00:00 2001
From: Cynthia Foxwell <gamers@riseup.net>
Date: Mon, 18 Dec 2023 22:29:48 -0700
Subject: [PATCH] micro-optimize background poly to only update when size
 changes

---
 lua/cbox/cl_chatbox.lua | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/lua/cbox/cl_chatbox.lua b/lua/cbox/cl_chatbox.lua
index 1d7de29..3ab8bcb 100644
--- a/lua/cbox/cl_chatbox.lua
+++ b/lua/cbox/cl_chatbox.lua
@@ -99,9 +99,11 @@ local function add_rounded_poly(poly, x, y, rad, seg, offset)
 	end
 end
 
-local function RoundedBoxPoly(x, y, w, h, rad, seg)
+local function RoundedBoxPoly(w, h, rad, seg)
 	local poly = {}
 
+	local x, y = 0, 0
+
 	add_rounded_poly(poly, x + rad, y + rad, rad, seg, seg)
 
 	poly[#poly + 1] = {
@@ -131,9 +133,11 @@ local function RoundedBoxPoly(x, y, w, h, rad, seg)
 
 	add_rounded_poly(poly, x + rad, y + (h - rad), rad, seg)
 
-	surface_DrawPoly(poly)
+	return poly
 end
 
+local PREV_W, PREV_H, BACKGROUND_POLY
+
 local function CreateChatbox()
 	if IsValid(cbox.chatbox.panels.frame) then
 		cbox.chatbox.panels.frame:Remove()
@@ -150,7 +154,7 @@ local function CreateChatbox()
 
 	-- TODO: make this configurable
 	frame:SetMinWidth(dw)
-	frame:SetMinWidth(dh)
+	frame:SetMinHeight(dh)
 
 	local x = frame:GetCookie("pos_x", dx)
 	local y = frame:GetCookie("pos_y", dy)
@@ -158,6 +162,9 @@ local function CreateChatbox()
 	local h = frame:GetCookie("height", dh)
 	frame:SetPos(x, y)
 	frame:SetSize(w, h)
+	PREV_W = w
+	PREV_H = h
+	BACKGROUND_POLY = RoundedBoxPoly(w, h, 8, 24)
 
 	frame:SetVisible(false)
 
@@ -197,7 +204,12 @@ local function CreateChatbox()
 
 		self.animFade:Run()
 
-		-- TODO: save position and size
+		local w, h = self:GetSize()
+		if w ~= PREV_W or h ~= PREV_H then
+			PREV_W = w
+			PREV_H = h
+			BACKGROUND_POLY = RoundedBoxPoly(w, h, 8, 24)
+		end
 	end
 
 	function frame:Paint(w, h)
@@ -220,7 +232,7 @@ local function CreateChatbox()
 
 		draw_NoTexture()
 		surface_SetDrawColor(255, 255, 255)
-		RoundedBoxPoly(0, 0, w, h, 8, 24)
+		surface_DrawPoly(BACKGROUND_POLY)
 
 		-- Only draw things that are in the stencil buffer
 		render_SetStencilCompareFunction( STENCIL_EQUAL )