From: Benjamin Otte <otte@redhat.com>
Date: Tue, 9 May 2023 22:09:03 +0000 (+0200)
Subject: vulkan: Don't explode without vertex data
X-Git-Tag: archive/raspbian/4.12.3+ds-1+rpi1~1^2^2^2~22^2~1^2~185^2~52
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=495ee1be3dcb832fd8961129204a9c9a5475ad43;p=gtk4.git

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.
---

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);