From e7975ca9f72bfa36ea6497d75a982132280fa2dd Mon Sep 17 00:00:00 2001
From: Jake Turner <jake@evansturner.co.uk>
Date: Sun, 27 Oct 2024 12:25:19 +0000
Subject: [PATCH] DXIL Debugger SampleGrad ddx/y inputs are length three not
 four

Fixes assert when executing SampleGrad
---
 renderdoc/driver/shaders/dxil/dxil_debug.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/renderdoc/driver/shaders/dxil/dxil_debug.cpp b/renderdoc/driver/shaders/dxil/dxil_debug.cpp
index 4e9254506..2d57a834e 100644
--- a/renderdoc/driver/shaders/dxil/dxil_debug.cpp
+++ b/renderdoc/driver/shaders/dxil/dxil_debug.cpp
@@ -689,7 +689,7 @@ static void ConvertDXILTypeToShaderVariable(const Type *type, ShaderVariable &va
 
 size_t ComputeDXILTypeByteSize(const Type *type)
 {
-  // JAKE TODO: byte alignment
+  // TODO: byte alignment
   size_t byteSize = 0;
   switch(type->type)
   {
@@ -4263,7 +4263,7 @@ void ThreadState::PerformGPUResourceOp(const rdcarray<ThreadState> &workgroups,
     // SampleGrad DDX is argument 10, DDY is argument 14
     // SampleCmpGrad DDX is argument 11, DDY is argument 15
     uint32_t ddx0 = dxOpCode == DXOp::SampleGrad ? 10 : 11;
-    uint32_t ddy0 = ddx0 + 4;
+    uint32_t ddy0 = ddx0 + 3;
     ShaderVariable arg;
     for(uint32_t i = 0; i < 4; i++)
     {