From 55577cf2b5d9aff06d838350501ea55db071adcd Mon Sep 17 00:00:00 2001
From: Nikita Tsukanov <keks9n@gmail.com>
Date: Thu, 17 Jan 2019 19:50:14 +0300
Subject: [PATCH] [SKIA] Throw if asked to render to GL target with invalid
 dimensions

---
 src/Skia/Avalonia.Skia/GlRenderTarget.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Skia/Avalonia.Skia/GlRenderTarget.cs b/src/Skia/Avalonia.Skia/GlRenderTarget.cs
index 7b28b87d56..cd8c334b53 100644
--- a/src/Skia/Avalonia.Skia/GlRenderTarget.cs
+++ b/src/Skia/Avalonia.Skia/GlRenderTarget.cs
@@ -30,6 +30,11 @@ namespace Avalonia.Skia
 
             var size = session.Size;
             var scaling = session.Scaling;
+            if (size.Width <= 0 || size.Height <= 0 || scaling < 0)
+            {
+                throw new InvalidOperationException(
+                    $"Can't create drawing context for surface with {size} size and {scaling} scaling");
+            }
 
             gl.Viewport(0, 0, size.Width, size.Height);
             gl.ClearStencil(0);