From 885844a845c1cf836f3ac4e695d708692cdf8d1a Mon Sep 17 00:00:00 2001
From: Mikko Mononen <memononen@gmail.com>
Date: Tue, 1 Apr 2014 16:33:49 +0300
Subject: [PATCH] Added quick hints on how to debug rendering issues

---
 README.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/README.md b/README.md
index 349fada..590d1e6 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,18 @@ nvgFillColor(vg, nvgRGBA(255,192,0,255));
 nvgFill(vg);
 ```
 
+## Rendering is wrong, what to do?
+
+- make sure you have created NanoVG context using one of the `nvgCreatexxx()` calls
+- make sure you have initialised OpenGL with stencil buffer
+- make sure you have cleared stencil buffer
+- make sure you have following OpenGL state between calls to `nvgBeginFrame()` and `nvgEndFrame()`:
+  - `glEnable(GL_CULL_FACE)`
+  - `glCullFace(GL_BACK)`
+  - `glEnable(GL_BLEND)`
+  - `glDisable(GL_DEPTH_TEST)`
+- if the problem still persists, please report an issue!
+
 ## API Reference
 
 See the header file [nanovg.h](/src/nanovg.h) for API reference.