From ac6611e37473467dc4ebb8e7b59fbca6317bdc99 Mon Sep 17 00:00:00 2001
From: tamasmeszaros <meszaros.q@gmail.com>
Date: Fri, 7 Jan 2022 10:06:52 +0100
Subject: [PATCH] Performance optimization for SLA rasterization step

Do not use a gamma function (a pow call for every pixel) if exponent is near 1.0
---
 src/libslic3r/SLA/RasterBase.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/libslic3r/SLA/RasterBase.cpp b/src/libslic3r/SLA/RasterBase.cpp
index 581e84880b..cc9aca0274 100644
--- a/src/libslic3r/SLA/RasterBase.cpp
+++ b/src/libslic3r/SLA/RasterBase.cpp
@@ -77,6 +77,8 @@ std::unique_ptr<RasterBase> create_raster_grayscale_aa(
     
     if (gamma > 0)
         rst = std::make_unique<RasterGrayscaleAAGammaPower>(res, pxdim, tr, gamma);
+    else if (std::abs(gamma - 1.) < 1e-6)
+        rst = std::make_unique<RasterGrayscaleAA>(res, pxdim, tr, agg::gamma_none());
     else
         rst = std::make_unique<RasterGrayscaleAA>(res, pxdim, tr, agg::gamma_threshold(.5));