From: Benjamin Otte <otte@redhat.com>
Date: Wed, 10 May 2023 15:55:56 +0000 (+0200)
Subject: vulkan: Add a static assert
X-Git-Tag: archive/raspbian/4.12.3+ds-1+rpi1~1^2^2^2~59^2^2~185^2~44
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/%22/%22http:/www.example.com/cgi/%22?a=commitdiff_plain;h=c479f93372e8b40feb21e0f5da9aab86200c2be1;p=gtk4.git

vulkan: Add a static assert

We don't want to make the push constants larger than what the spec
guarantees. And that is 128 bytes, see value for
maxPushConstantsSize in table 55 of
https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#limits-minmax
---

diff --git a/gsk/vulkan/gskvulkanpushconstants.c b/gsk/vulkan/gskvulkanpushconstants.c
index 36ba9852a6..0bf5ca71b0 100644
--- a/gsk/vulkan/gskvulkanpushconstants.c
+++ b/gsk/vulkan/gskvulkanpushconstants.c
@@ -15,6 +15,12 @@ struct _GskVulkanPushConstantsWire
   } common;
 };
 
+/* This is the value we know every conformant GPU must provide.
+ * See value for maxPushConstantsSize in table 55 of
+ * https://registry.khronos.org/vulkan/specs/1.3-extensions/html/vkspec.html#limits-minmax
+ */
+G_STATIC_ASSERT (sizeof (GskVulkanPushConstantsWire) <= 128);
+
 void
 gsk_vulkan_push_constants_init (GskVulkanPushConstants  *constants,
                                 const graphene_matrix_t *mvp,