From 5749b5a825f0d30a14a305b5cdb2a73a80323cbc Mon Sep 17 00:00:00 2001
From: "Unknown W. Brackets" <checkins@unknownbrackets.org>
Date: Tue, 13 Dec 2022 22:04:00 -0800
Subject: [PATCH] GPU: Clear shaders on use flag change.

---
 GPU/D3D11/GPU_D3D11.cpp  | 8 ++++++++
 GPU/Directx9/GPU_DX9.cpp | 8 ++++++++
 GPU/GLES/GPU_GLES.cpp    | 8 ++++++++
 3 files changed, 24 insertions(+)

diff --git a/GPU/D3D11/GPU_D3D11.cpp b/GPU/D3D11/GPU_D3D11.cpp
index 7504d04bb5..091c10a946 100644
--- a/GPU/D3D11/GPU_D3D11.cpp
+++ b/GPU/D3D11/GPU_D3D11.cpp
@@ -157,6 +157,14 @@ void GPU_D3D11::BeginFrame() {
 
 	framebufferManagerD3D11_->BeginFrame();
 	gstate_c.Dirty(DIRTY_PROJTHROUGHMATRIX);
+
+	if (gstate_c.useFlagsChanged) {
+		// TODO: It'd be better to recompile them in the background, probably?
+		// This most likely means that saw equal depth changed.
+		WARN_LOG(G3D, "Shader use flags changed, clearing all shaders");
+		shaderManagerD3D11_->ClearShaders();
+		gstate_c.useFlagsChanged = false;
+	}
 }
 
 void GPU_D3D11::CopyDisplayToOutput(bool reallyDirty) {
diff --git a/GPU/Directx9/GPU_DX9.cpp b/GPU/Directx9/GPU_DX9.cpp
index 7f13bb10ee..a7398018e9 100644
--- a/GPU/Directx9/GPU_DX9.cpp
+++ b/GPU/Directx9/GPU_DX9.cpp
@@ -155,6 +155,14 @@ void GPU_DX9::BeginFrame() {
 	shaderManagerDX9_->DirtyShader();
 
 	framebufferManager_->BeginFrame();
+
+	if (gstate_c.useFlagsChanged) {
+		// TODO: It'd be better to recompile them in the background, probably?
+		// This most likely means that saw equal depth changed.
+		WARN_LOG(G3D, "Shader use flags changed, clearing all shaders");
+		shaderManagerDX9_->ClearCache(true);
+		gstate_c.useFlagsChanged = false;
+	}
 }
 
 void GPU_DX9::CopyDisplayToOutput(bool reallyDirty) {
diff --git a/GPU/GLES/GPU_GLES.cpp b/GPU/GLES/GPU_GLES.cpp
index b5873364c3..9d33c11210 100644
--- a/GPU/GLES/GPU_GLES.cpp
+++ b/GPU/GLES/GPU_GLES.cpp
@@ -271,6 +271,14 @@ void GPU_GLES::InitClear() {
 void GPU_GLES::BeginHostFrame() {
 	GPUCommon::BeginHostFrame();
 	drawEngine_.BeginFrame();
+
+	if (gstate_c.useFlagsChanged) {
+		// TODO: It'd be better to recompile them in the background, probably?
+		// This most likely means that saw equal depth changed.
+		WARN_LOG(G3D, "Shader use flags changed, clearing all shaders");
+		shaderManagerGL_->ClearCache(true);
+		gstate_c.useFlagsChanged = false;
+	}
 }
 
 void GPU_GLES::EndHostFrame() {