From adbe333414fb5c92b6f49e809b67cf71f1a2209b Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Wed, 15 Dec 2021 06:10:30 +1100
Subject: [PATCH] [client] egl: dmabuf can be used without
 GL_EXT_buffer_storage support

---
 client/renderers/EGL/desktop.c |  7 +++++++
 client/renderers/EGL/egl.c     | 13 +++++++------
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/client/renderers/EGL/desktop.c b/client/renderers/EGL/desktop.c
index 3921dffd..5671207d 100644
--- a/client/renderers/EGL/desktop.c
+++ b/client/renderers/EGL/desktop.c
@@ -326,6 +326,13 @@ bool egl_desktopUpdate(EGL_Desktop * desktop, const FrameBuffer * frame, int dma
 
     desktop->useDMA = false;
 
+    const char * gl_exts = (const char *)glGetString(GL_EXTENSIONS);
+    if (!util_hasGLExt(gl_exts, "GL_EXT_buffer_storage"))
+    {
+      DEBUG_ERROR("GL_EXT_buffer_storage is needed to use EGL backend");
+      return false;
+    }
+
     egl_textureFree(&desktop->texture);
     if (!egl_textureInit(&desktop->texture, desktop->display,
           EGL_TEXTYPE_FRAMEBUFFER, true))
diff --git a/client/renderers/EGL/egl.c b/client/renderers/EGL/egl.c
index 09dc232c..86b726bc 100644
--- a/client/renderers/EGL/egl.c
+++ b/client/renderers/EGL/egl.c
@@ -798,12 +798,6 @@ static bool egl_renderStartup(LG_Renderer * renderer, bool useDMA)
   glGetIntegerv(GL_MAJOR_VERSION, &esMaj);
   glGetIntegerv(GL_MINOR_VERSION, &esMin);
 
-  if (!util_hasGLExt(gl_exts, "GL_EXT_buffer_storage"))
-  {
-    DEBUG_ERROR("GL_EXT_buffer_storage is needed to use EGL backend");
-    return false;
-  }
-
   if (!util_hasGLExt(gl_exts, "GL_EXT_texture_format_BGRA8888"))
   {
     DEBUG_ERROR("GL_EXT_texture_format_BGRA8888 is needed to use EGL backend");
@@ -836,7 +830,14 @@ static bool egl_renderStartup(LG_Renderer * renderer, bool useDMA)
     this->dmaSupport = true;
 
   if (!this->dmaSupport)
+  {
     useDMA = false;
+    if (!util_hasGLExt(gl_exts, "GL_EXT_buffer_storage"))
+    {
+      DEBUG_ERROR("GL_EXT_buffer_storage is needed to use EGL backend");
+      return false;
+    }
+  }
 
   if (debugContext)
   {