C4Sky.h

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/*
 * OpenClonk, http://www.openclonk.org
 *
 * Copyright (c) 1998-2000, Matthes Bender
 * Copyright (c) 2001-2009, RedWolf Design GmbH, http://www.clonk.de/
 * Copyright (c) 2013-2016, The OpenClonk Team and contributors
 *
 * Distributed under the terms of the ISC license; see accompanying file
 * "COPYING" for details.
 *
 * "Clonk" is a registered trademark of Matthes Bender, used with permission.
 * See accompanying file "TRADEMARK" for details.
 *
 * To redistribute this file separately, substitute the full license texts
 * for the above references.
 */
 
/* Small member of the landscape class to handle the sky background */
 
#ifndef INC_C4Sky
#define INC_C4Sky
 
#include "graphics/C4Shader.h"
 
#define C4SkyPM_Fixed     0   // sky parallax mode: fixed
#define C4SkyPM_Wind      1   // sky parallax mode: blown by the wind
 
class C4Sky
{
public:
    C4Sky() { Default(); }
    ~C4Sky();
    void Default(); // zero fields
 
    bool Init(bool fSavegame, std::string names = "");
    void Clear();
    void SetColor(int32_t iIndex, int32_t iRed, int32_t iGreen, int32_t iBlue);
    void SetFadePalette(int32_t *ipColors);
    void Draw(C4TargetFacet &cgo); // draw sky
    DWORD GetSkyFadeClr(int32_t iY); // get sky color at iY
    void Execute();   // move sky
    bool SetModulation(DWORD dwWithClr, DWORD dwBackClr); // adjust the way the sky is blitted
    DWORD GetModulation(bool fBackClr)
    { return fBackClr ? BackClr : Modulation; }
    void CompileFunc(StdCompiler *pComp);
protected:
    int32_t Width, Height;
    uint32_t Modulation;
    int32_t BackClr;          // background color behind sky
    bool BackClrEnabled;    // is the background color enabled?
public:
    class C4Surface * Surface;
    C4Shader Shader;          // shader to draw sky w/o dynamic light  (global viewport)
    C4Shader ShaderLight;     // shader to draw sky with dynamic light (player viewport)
    C4Real xdir,ydir;  // sky movement speed
    C4Real x,y;        // sky movement pos
    int32_t ParX, ParY; // parallax movement in xdir/ydir
    uint32_t FadeClr1, FadeClr2;
    int32_t ParallaxMode;     // sky scrolling mode
};
 
#endif