/**
 * @file lldrawpoolwater.h
 * @brief LLDrawPoolWater class definition
 *
 * $LicenseInfo:firstyear=2002&license=viewergpl$
 *
 * Copyright (c) 2002-2009, Linden Research, Inc.
 *
 * Second Life Viewer Source Code
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
 *
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at
 * http://secondlifegrid.net/programs/open_source/licensing/flossexception
 *
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 *
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 */

#ifndef LL_LLDRAWPOOLWATER_H
#define LL_LLDRAWPOOLWATER_H

#include "lldrawpool.h"

class LLFace;
class LLGLSLShader;
class LLHeavenBody;
class LLWaterSurface;

class LLDrawPoolWater final : public LLFacePool
{
public:
	enum
	{
		VERTEX_DATA_MASK =	LLVertexBuffer::MAP_VERTEX |
							LLVertexBuffer::MAP_NORMAL |
							LLVertexBuffer::MAP_TEXCOORD0
	};

	LL_INLINE U32 getVertexDataMask() override
	{
		return VERTEX_DATA_MASK;
	}

	LLDrawPoolWater();

	void prerender() override;

	S32 getNumPasses() override;				// Returns 0 in PBR mode
	// The three following methods are only for use by the EE renderer.
	void render(S32 pass = 0) override;
	S32 getNumDeferredPasses() override;
	void renderDeferred(S32 pass = 0) override;

	// The two following methods are only for use by the PBR renderer.
	S32 getNumPostDeferredPasses() override;
	void renderPostDeferred(S32) override;

	void setOpaqueTexture(const LLUUID& tex_id);
	void setTransparentTextures(const LLUUID& tex1_id,
								const LLUUID& tex2_id = LLUUID::null);
	void setNormalMaps(const LLUUID& tex1_id,
					   const LLUUID& tex2_id = LLUUID::null);

	LL_INLINE static void restoreGL()
	{
		sNeedsReflectionUpdate = sNeedsTexturesReload = true;
	}

private:
	S32 getWaterPasses();
	// Methods for use by the EE renderer only
	void renderReflection(LLFace* facep);
	void renderWater();
	void renderOpaqueLegacyWater();
	void shadeWater(LLGLSLShader* shaderp, bool edge);
	// Only for use by the PBR renderer
	void shadeWaterPBR(LLGLSLShader* shaderp, bool edge);

private:
	LLPointer<LLViewerTexture>	mWaterImagep[2];
	LLPointer<LLViewerTexture>	mWaterNormp[2];
	LLPointer<LLViewerTexture>	mOpaqueWaterImagep;
	LLVector3					mLightDir;
	LLColor4					mLightColor;
	LLColor3					mLightDiffuse;

public:
	static LLColor4				sWaterFogColor;
	static bool					sNeedsReflectionUpdate;
	static bool					sNeedsTexturesReload;
};

#endif // LL_LLDRAWPOOLWATER_H