From 41235eed1dad40abf7a34750beedff1176e0c6e5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Foucault?= <foucault.clem@gmail.com>
Date: Tue, 18 Aug 2020 13:53:00 +0200
Subject: GPU: Avoid invalid GL API usage

Drawing with 0 sized buffer is prohibited.
---
 source/blender/gpu/opengl/gl_drawlist.cc | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'source/blender/gpu/opengl/gl_drawlist.cc')

diff --git a/source/blender/gpu/opengl/gl_drawlist.cc b/source/blender/gpu/opengl/gl_drawlist.cc
index b02681af892..16ea924d8dc 100644
--- a/source/blender/gpu/opengl/gl_drawlist.cc
+++ b/source/blender/gpu/opengl/gl_drawlist.cc
@@ -151,6 +151,11 @@ void GLDrawList::append(GPUBatch *batch, int i_first, int i_count)
     v_count_ = batch->elem ? batch->elem->index_len : batch->verts[0]->vertex_len;
   }
 
+  if (v_count_ == 0) {
+    /* Nothing to draw. */
+    return;
+  }
+
   if (MDI_INDEXED) {
     GLDrawCommandIndexed *cmd = reinterpret_cast<GLDrawCommandIndexed *>(data_ + command_offset_);
     cmd->v_first = v_first_;
-- 
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