From 816daad67318f0c8943078415ba3ec34cde2622d Mon Sep 17 00:00:00 2001
From: Magnus Norddahl <dpjudas@users.noreply.github.com>
Date: Sun, 24 Sep 2023 13:15:00 +0200
Subject: [PATCH] Prevent buffer overrun

---
 src/common/rendering/vulkan/accelstructs/vk_lightmap.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/common/rendering/vulkan/accelstructs/vk_lightmap.cpp b/src/common/rendering/vulkan/accelstructs/vk_lightmap.cpp
index bee1e5affd..5d9bbd160d 100644
--- a/src/common/rendering/vulkan/accelstructs/vk_lightmap.cpp
+++ b/src/common/rendering/vulkan/accelstructs/vk_lightmap.cpp
@@ -249,6 +249,13 @@ void VkLightmap::Render()
 			drawindexed.Constants[drawindexed.Pos] = pc;
 			drawindexed.Commands[drawindexed.Pos] = cmd;
 			drawindexed.Pos++;
+
+			if (drawindexed.Pos == drawindexed.BufferSize)
+			{
+				// Our indirect draw buffer is full. Postpone the rest.
+				buffersFull = true;
+				break;
+			}
 #else
 			cmdbuffer->pushConstants(raytrace.pipelineLayout.get(), VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0, sizeof(LightmapRaytracePC), &pc);
 			cmdbuffer->drawIndexed(surface->numElements, 1, surface->startElementIndex, 0, 0);