From 05f9733192fa4f1969d9a56752cc107954159fa9 Mon Sep 17 00:00:00 2001
From: Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
Date: Fri, 24 May 2024 10:31:54 +0100
Subject: [PATCH] LibGfx: Make accumulate_even_odd_scanline() go faster

...by checking scanline vector bounds before entering the loop.
---
 Userland/Libraries/LibGfx/EdgeFlagPathRasterizer.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Userland/Libraries/LibGfx/EdgeFlagPathRasterizer.cpp b/Userland/Libraries/LibGfx/EdgeFlagPathRasterizer.cpp
index a7c2ecc38cb..176edeec09e 100644
--- a/Userland/Libraries/LibGfx/EdgeFlagPathRasterizer.cpp
+++ b/Userland/Libraries/LibGfx/EdgeFlagPathRasterizer.cpp
@@ -309,10 +309,12 @@ template<unsigned SamplesPerPixel>
 auto EdgeFlagPathRasterizer<SamplesPerPixel>::accumulate_even_odd_scanline(EdgeExtent edge_extent, auto init, auto sample_callback)
 {
     SampleType sample = init;
+    VERIFY(edge_extent.min_x >= 0);
+    VERIFY(edge_extent.max_x <= static_cast<int>(m_scanline.size()));
     for (int x = edge_extent.min_x; x <= edge_extent.max_x; x += 1) {
-        sample ^= m_scanline[x];
+        sample ^= m_scanline.data()[x];
         sample_callback(x, sample);
-        m_scanline[x] = 0;
+        m_scanline.data()[x] = 0;
     }
     return sample;
 }