From a3c2f831c81d1189538ca45eb8354803a2f4448f Mon Sep 17 00:00:00 2001
From: Leon Styhre <leon@leonstyhre.com>
Date: Sat, 16 Jan 2021 20:53:09 +0100
Subject: [PATCH] Clamped the scale factor in NinePatchComponent to avoid
 artifacts for extreme screen resolutions.

---
 es-core/src/components/NinePatchComponent.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/es-core/src/components/NinePatchComponent.cpp b/es-core/src/components/NinePatchComponent.cpp
index aafff8078..e26d0e1ad 100644
--- a/es-core/src/components/NinePatchComponent.cpp
+++ b/es-core/src/components/NinePatchComponent.cpp
@@ -51,8 +51,11 @@ void NinePatchComponent::buildVertices()
     if (mVertices != nullptr)
         delete[] mVertices;
 
-    // Scale the corner size relative to the screen resolution.
-    mTexture = TextureResource::get(mPath, false, false, true, Renderer::getScreenWidthModifier());
+    // Scale the corner size relative to the screen resolution, but keep the scale factor
+    // within reason as extreme resolutions may cause artifacts. Any "normal" resolution
+    // (e.g. from 720p to 4K) will be within these boundaries though.
+    float scaleFactor = Math::clamp(Renderer::getScreenWidthModifier(), 0.4f, 3.0f);
+    mTexture = TextureResource::get(mPath, false, false, true, scaleFactor);
 
     if (mTexture->getSize() == Vector2i::Zero()) {
         mVertices = nullptr;