From a16308277063f5825b0f0c0ae00ca4cfb163548d Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Tue, 19 Mar 2024 19:31:42 +0100
Subject: [PATCH] [dxvk] Align index buffer size to index size

Fixes validation errors in FFXIV.
---
 src/dxvk/dxvk_context.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/dxvk/dxvk_context.cpp b/src/dxvk/dxvk_context.cpp
index bbd139ed..9bb9c92c 100644
--- a/src/dxvk/dxvk_context.cpp
+++ b/src/dxvk/dxvk_context.cpp
@@ -5594,11 +5594,13 @@ namespace dxvk {
     auto bufferInfo = m_state.vi.indexBuffer.getDescriptor();
 
     if (m_features.test(DxvkContextFeature::IndexBufferRobustness)) {
+      VkDeviceSize align = m_state.vi.indexType == VK_INDEX_TYPE_UINT16 ? 2 : 4;
+      VkDeviceSize range = bufferInfo.buffer.range & ~(align - 1);
+
       m_cmd->cmdBindIndexBuffer2(
         bufferInfo.buffer.buffer,
         bufferInfo.buffer.offset,
-        bufferInfo.buffer.range,
-        m_state.vi.indexType);
+        range, m_state.vi.indexType);
     } else {
       m_cmd->cmdBindIndexBuffer(
         bufferInfo.buffer.buffer,