From 643ed528c2f3303413b3cf815aae4f6e6b897682 Mon Sep 17 00:00:00 2001
From: Gregory Hainaut <gregory.hainaut@gmail.com>
Date: Thu, 7 Feb 2019 12:08:44 +0100
Subject: [PATCH] gsdx hw: allow to create sparse texture at device level

Obviously texture allocation should be updated too
---
 plugins/GSdx/Renderers/Common/GSDevice.cpp    | 10 ++++++++++
 plugins/GSdx/Renderers/Common/GSDevice.h      |  5 +++++
 plugins/GSdx/Renderers/Common/GSTexture.h     |  2 +-
 plugins/GSdx/Renderers/DX11/GSDevice11.cpp    |  2 +-
 plugins/GSdx/Renderers/OpenGL/GSDeviceOGL.cpp |  2 +-
 5 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/plugins/GSdx/Renderers/Common/GSDevice.cpp b/plugins/GSdx/Renderers/Common/GSDevice.cpp
index bcd1ed6b4c..06a7790631 100644
--- a/plugins/GSdx/Renderers/Common/GSDevice.cpp
+++ b/plugins/GSdx/Renderers/Common/GSDevice.cpp
@@ -201,6 +201,16 @@ void GSDevice::PurgePool()
 	}
 }
 
+GSTexture* GSDevice::CreateSparseRenderTarget(int w, int h, int format)
+{
+	return FetchSurface(HasColorSparse() ? GSTexture::SparseRenderTarget : GSTexture::RenderTarget, w, h, format);
+}
+
+GSTexture* GSDevice::CreateSparseDepthStencil(int w, int h, int format)
+{
+	return FetchSurface(HasDepthSparse() ? GSTexture::SparseDepthStencil : GSTexture::DepthStencil, w, h, format);
+}
+
 GSTexture* GSDevice::CreateRenderTarget(int w, int h, int format)
 {
 	return FetchSurface(GSTexture::RenderTarget, w, h, format);
diff --git a/plugins/GSdx/Renderers/Common/GSDevice.h b/plugins/GSdx/Renderers/Common/GSDevice.h
index 11c7c443fd..e9b0c89632 100644
--- a/plugins/GSdx/Renderers/Common/GSDevice.h
+++ b/plugins/GSdx/Renderers/Common/GSDevice.h
@@ -167,11 +167,16 @@ public:
 	virtual void DrawIndexedPrimitive(int offset, int count) {}
 	virtual void EndScene();
 
+	virtual bool HasDepthSparse() { return false; }
+	virtual bool HasColorSparse() { return false; }
+
 	virtual void ClearRenderTarget(GSTexture* t, const GSVector4& c) {}
 	virtual void ClearRenderTarget(GSTexture* t, uint32 c) {}
 	virtual void ClearDepth(GSTexture* t) {}
 	virtual void ClearStencil(GSTexture* t, uint8 c) {}
 
+	GSTexture* CreateSparseRenderTarget(int w, int h, int format = 0);
+	GSTexture* CreateSparseDepthStencil(int w, int h, int format = 0);
 	GSTexture* CreateRenderTarget(int w, int h, int format = 0);
 	GSTexture* CreateDepthStencil(int w, int h, int format = 0);
 	GSTexture* CreateTexture(int w, int h, int format = 0);
diff --git a/plugins/GSdx/Renderers/Common/GSTexture.h b/plugins/GSdx/Renderers/Common/GSTexture.h
index 534d48b02b..ed4dd87805 100644
--- a/plugins/GSdx/Renderers/Common/GSTexture.h
+++ b/plugins/GSdx/Renderers/Common/GSTexture.h
@@ -34,7 +34,7 @@ protected:
 public:
 	struct GSMap {uint8* bits; int pitch;};
 
-	enum {RenderTarget = 1, DepthStencil, Texture, Offscreen, Backbuffer};
+	enum {RenderTarget = 1, DepthStencil, Texture, Offscreen, Backbuffer, SparseRenderTarget, SparseDepthStencil};
 
 public:
 	GSTexture();
diff --git a/plugins/GSdx/Renderers/DX11/GSDevice11.cpp b/plugins/GSdx/Renderers/DX11/GSDevice11.cpp
index 12c481f417..e727997238 100644
--- a/plugins/GSdx/Renderers/DX11/GSDevice11.cpp
+++ b/plugins/GSdx/Renderers/DX11/GSDevice11.cpp
@@ -735,7 +735,7 @@ GSTexture* GSDevice11::CreateSurface(int type, int w, int h, int format)
 GSTexture* GSDevice11::FetchSurface(int type, int w, int h, int format)
 {
 	if (format == 0)
-		format = (type == GSTexture::DepthStencil) ? DXGI_FORMAT_R32G8X24_TYPELESS : DXGI_FORMAT_R8G8B8A8_UNORM;
+		format = (type == GSTexture::DepthStencil || type == GSTexture::SparseDepthStencil) ? DXGI_FORMAT_R32G8X24_TYPELESS : DXGI_FORMAT_R8G8B8A8_UNORM;
 
 	return __super::FetchSurface(type, w, h, format);
 }
diff --git a/plugins/GSdx/Renderers/OpenGL/GSDeviceOGL.cpp b/plugins/GSdx/Renderers/OpenGL/GSDeviceOGL.cpp
index 8cbc563b50..22be9c1758 100644
--- a/plugins/GSdx/Renderers/OpenGL/GSDeviceOGL.cpp
+++ b/plugins/GSdx/Renderers/OpenGL/GSDeviceOGL.cpp
@@ -258,7 +258,7 @@ GSTexture* GSDeviceOGL::CreateSurface(int type, int w, int h, int fmt)
 GSTexture* GSDeviceOGL::FetchSurface(int type, int w, int h, int format)
 {
 	if (format == 0)
-		format = (type == GSTexture::DepthStencil) ? GL_DEPTH32F_STENCIL8 : GL_RGBA8;
+		format = (type == GSTexture::DepthStencil || type == GSTexture::SparseDepthStencil) ? GL_DEPTH32F_STENCIL8 : GL_RGBA8;
 
 	GSTexture* t = GSDevice::FetchSurface(type, w, h, format);