From 495ee1be3dcb832fd8961129204a9c9a5475ad43 Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Wed, 10 May 2023 00:09:03 +0200
Subject: [PATCH] vulkan: Don't explode without vertex data

If no buffer has any vertex data (read: if nothing gets drawn), don't
try to allocate a 0 bytes buffer.
---
 gsk/vulkan/gskvulkanrenderpass.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gsk/vulkan/gskvulkanrenderpass.c b/gsk/vulkan/gskvulkanrenderpass.c
index 0b1d431161..ac30272848 100644
--- a/gsk/vulkan/gskvulkanrenderpass.c
+++ b/gsk/vulkan/gskvulkanrenderpass.c
@@ -1807,6 +1807,9 @@ gsk_vulkan_render_pass_get_vertex_data (GskVulkanRenderPass *self,
       guchar *data;
 
       n_bytes = gsk_vulkan_render_pass_count_vertex_data (self);
+      if (n_bytes == 0)
+        return NULL;
+
       self->vertex_data = gsk_vulkan_buffer_new (self->vulkan, n_bytes);
       data = gsk_vulkan_buffer_map (self->vertex_data);
       gsk_vulkan_render_pass_collect_vertex_data (self, render, data, 0, n_bytes);
-- 
2.30.2