From d9fd9751382d3a1c37d9200c37713e2d0ff4c4ea Mon Sep 17 00:00:00 2001
From: baldurk <baldurk@baldurk.org>
Date: Mon, 13 Nov 2023 15:15:30 +0000
Subject: [PATCH] Add a test of unmapping read-only persistent buffers on GL

---
 util/test/demos/gl/gl_parameter_zoo.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/util/test/demos/gl/gl_parameter_zoo.cpp b/util/test/demos/gl/gl_parameter_zoo.cpp
index ebe6f26eb..fe2157a9f 100644
--- a/util/test/demos/gl/gl_parameter_zoo.cpp
+++ b/util/test/demos/gl/gl_parameter_zoo.cpp
@@ -184,6 +184,10 @@ void main()
     ActivateContext(mainWindow, NULL);
     ActivateContext(mainWindow, mainContext, true);
 
+    GLuint mapPersTest = MakeBuffer();
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, mapPersTest);
+    glBufferStorage(GL_SHADER_STORAGE_BUFFER, 1024, 0, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
+
     while(Running())
     {
       // trash the texture pack/unpack state
@@ -198,6 +202,10 @@ void main()
       glPixelStorei(GL_PACK_SKIP_ROWS, 33);
       glPixelStorei(GL_PACK_ALIGNMENT, 8);
 
+      glBindBuffer(GL_SHADER_STORAGE_BUFFER, mapPersTest);
+      glMapBufferRange(GL_SHADER_STORAGE_BUFFER, 0, 1024, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
+      glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
+
       for(int i = 0; i < 100; i++)
         glGetError();