// Copyright Epic Games, Inc. All Rights Reserved.

#include "MaterialCache/MaterialCache.h"
#include "ComponentRecreateRenderStateContext.h"
#include "VT/VirtualTextureBuildSettings.h"
#include "HAL/IConsoleManager.h"
#include "RenderUtils.h"

static TAutoConsoleVariable CVarMaterialCacheSupported(
	TEXT("r.MaterialCache.Support"),
	false,
	TEXT("Enable material cache support"),
	ECVF_ReadOnly
);

static TAutoConsoleVariable CVarMaterialCacheEnabled(
	TEXT("r.MaterialCache.Enabled"),
	true,
	TEXT("Enable runtime material cache"),
	FConsoleVariableDelegate::CreateLambda([](IConsoleVariable*)
	{
		// Recreate all proxies with new descriptor data
		FGlobalComponentRecreateRenderStateContext Context;
	}),
	ECVF_RenderThreadSafe | ECVF_Scalability
);

static TAutoConsoleVariable CVarMaterialCacheTileWidth(
	TEXT("r.MaterialCache.TileWidth"),
	128,
	TEXT("Tile width (per axis) of each tile"),
	ECVF_ReadOnly
);

static TAutoConsoleVariable CVarMaterialCacheTileBorderWidth(
	TEXT("r.MaterialCache.TileBorderWidth"),
	0,
	TEXT("Tile border width (per axis) of each tile"),
	ECVF_ReadOnly
);

uint32 GetMaterialCacheTileWidth()
{
	static uint32 Width = FVirtualTextureBuildSettings::ClampAndAlignTileSize(CVarMaterialCacheTileWidth->GetInt());
	return Width;
}

uint32 GetMaterialCacheTileBorderWidth()
{
	static uint32 Width = FVirtualTextureBuildSettings::ClampAndAlignTileBorderSize(CVarMaterialCacheTileBorderWidth->GetInt());
	return Width;
}

bool IsMaterialCacheSupported(FStaticShaderPlatform Platform)
{
	return CVarMaterialCacheSupported->GetBool() && UseVirtualTexturing(Platform);
}

bool IsMaterialCacheEnabled(FStaticShaderPlatform Platform)
{
	return IsMaterialCacheSupported(Platform) && CVarMaterialCacheEnabled->GetBool();
}