// SONIC ROBO BLAST 2
//-----------------------------------------------------------------------------
// Copyright (C) 1998-2000 by DooM Legacy Team.
// Copyright (C) 1999-2020 by Sonic Team Junior.
//
// This program is free software distributed under the
// terms of the GNU General Public License, version 2.
// See the 'LICENSE' file for more details.
//-----------------------------------------------------------------------------
/// \file hw_defs.h
/// \brief 3D hardware renderer definitions

#ifndef _HWR_DEFS_
#define _HWR_DEFS_
#include "../doomtype.h"
#include "../r_defs.h"

#define ZCLIP_PLANE 4.0f // Used for the actual game drawing
#define NZCLIP_PLANE 0.9f // Seems to be only used for the HUD and screen textures

// ==========================================================================
//                                                               SIMPLE TYPES
// ==========================================================================

typedef long            FINT;
typedef unsigned long   FUINT;
typedef unsigned char   FUBYTE;
typedef unsigned long   FBITFIELD;
#ifndef __MINGW32__
typedef float           FLOAT;
#endif
typedef unsigned char   FBOOLEAN;

// ==========================================================================
//                                                                     COLORS
// ==========================================================================

// byte value for paletted graphics, which represent the transparent color
#define HWR_PATCHES_CHROMAKEY_COLORINDEX   255
//#define HWR_CHROMAKEY_EQUIVALENTCOLORINDEX 130

// the chroma key color shows on border sprites, set it to black
#define HWR_PATCHES_CHROMAKEY_COLORVALUE     (0x00000000)    //RGBA format as in grSstWinOpen()

// RGBA Color components with float type ranging [ 0 ... 1 ]
struct FRGBAFloat
{
	FLOAT   red;
	FLOAT   green;
	FLOAT   blue;
	FLOAT   alpha;
};
typedef struct FRGBAFloat FRGBAFloat;

struct FColorARGB
{
	FUBYTE  alpha;
	FUBYTE  red;
	FUBYTE  green;
	FUBYTE  blue;
};
typedef struct FColorARGB ARGB_t;
typedef struct FColorARGB FColorARGB;



// ==========================================================================
//                                                                    VECTORS
// ==========================================================================

// Simple 2D coordinate
typedef struct
{
	FLOAT x,y;
} F2DCoord, v2d_t;

// ======================
//      wallVert3D
// ----------------------
// :crab: IS GONE! :crab:
// ======================

// -----------
// structures
// -----------

//Hurdler: Transform (coords + angles)
//BP: transform order : scale(rotation_x(rotation_y(translation(v))))

// Kart features
//#define USE_FTRANSFORM_ANGLEZ
//#define USE_FTRANSFORM_MIRROR

// Vanilla features
#define USE_MODEL_NEXTFRAME

typedef struct
{
	FLOAT       x,y,z;           // position
#ifdef USE_FTRANSFORM_ANGLEZ
	FLOAT       anglex,angley,anglez;   // aimingangle / viewangle
#else
	FLOAT       anglex,angley;   // aimingangle / viewangle
#endif
	FLOAT       scalex,scaley,scalez;
	FLOAT       fovxangle, fovyangle;
	UINT8       splitscreen;
	boolean     flip;            // screenflip
	boolean     roll;
	SINT8       rollflip;
	FLOAT       rollangle; // done to not override USE_FTRANSFORM_ANGLEZ
	UINT8       rotaxis;
	FLOAT       centerx, centery;
#ifdef USE_FTRANSFORM_MIRROR
	boolean     mirror;          // SRB2Kart: Encore Mode
#endif
	boolean     shearing;        // 14042019
	float       viewaiming;      // 17052019
} FTransform;

// Transformed vector, as passed to HWR API
typedef struct
{
	FLOAT       x,y,z;
	FLOAT       s;            // s texture ordinate (s over w)
	FLOAT       t;            // t texture ordinate (t over w)
} FOutVector;


// ==========================================================================
//                                                               RENDER MODES
// ==========================================================================

// Flags describing how to render a polygon
// You pass a combination of these flags to DrawPolygon()
enum EPolyFlags
{
		// the first 5 are mutually exclusive

	PF_Masked           = 0x00000001,   // Poly is alpha scaled and 0 alpha pels are discarded (holes in texture)
	PF_Translucent      = 0x00000002,   // Poly is transparent, alpha = level of transparency
	PF_Additive         = 0x00000004,   // Poly is added to the frame buffer
	PF_Environment      = 0x00000008,   // Poly should be drawn environment mapped.
	                                    // Hurdler: used for text drawing
	PF_Substractive     = 0x00000010,   // for splat
	PF_NoAlphaTest      = 0x00000020,   // hiden param
	PF_Fog              = 0x00000040,   // Fog blocks
	PF_Blending         = (PF_Environment|PF_Additive|PF_Translucent|PF_Masked|PF_Substractive|PF_Fog)&~PF_NoAlphaTest,

		// other flag bits

	PF_Occlude          = 0x00000100,   // Update the depth buffer
	PF_NoDepthTest      = 0x00000200,   // Disable the depth test mode
	PF_Invisible        = 0x00000400,   // Disable write to color buffer
	PF_Decal            = 0x00000800,   // Enable polygon offset
	PF_Modulated        = 0x00001000,   // Modulation (multiply output with constant ARGB)
	                                    // When set, pass the color constant into the FSurfaceInfo -> PolyColor
	PF_NoTexture        = 0x00002000,   // Use the small white texture
	PF_Corona           = 0x00004000,   // Tell the rendrer we are drawing a corona
	PF_Ripple           = 0x00008000,   // Water shader effect
	PF_RemoveYWrap      = 0x00010000,   // Force clamp texture on Y
	PF_ForceWrapX       = 0x00020000,   // Force repeat texture on X
	PF_ForceWrapY       = 0x00040000,   // Force repeat texture on Y
	PF_Clip             = 0x40000000,   // clip to frustum and nearz plane (glide only, automatic in opengl)
	PF_NoZClip          = 0x20000000,   // in conjonction with PF_Clip
	PF_Debug            = 0x80000000    // print debug message in driver :)
};


enum ESurfFlags
{
	SF_DYNLIGHT         = 0x00000001,
};

enum ETextureFlags
{
	TF_WRAPX       = 0x00000001,        // wrap around X
	TF_WRAPY       = 0x00000002,        // wrap around Y
	TF_WRAPXY      = TF_WRAPY|TF_WRAPX, // very common so use alias is more easy
	TF_CHROMAKEYED = 0x00000010,
	TF_TRANSPARENT = 0x00000040,        // texture with some alpha == 0
};

typedef struct GLMipmap_s FTextureInfo;

// jimita 14032019
struct FLightInfo
{
	FUINT			light_level;
	FUINT			fade_start;
	FUINT			fade_end;
};
typedef struct FLightInfo FLightInfo;

// Description of a renderable surface
struct FSurfaceInfo
{
	FUINT			PolyFlags;
	RGBA_t			PolyColor;
	RGBA_t			TintColor;
	RGBA_t			FadeColor;
	FLightInfo		LightInfo;	// jimita 14032019
};
typedef struct FSurfaceInfo FSurfaceInfo;

#define GL_DEFAULTMIX 0x00000000
#define GL_DEFAULTFOG 0xFF000000

//Hurdler: added for backward compatibility
enum hwdsetspecialstate
{
	HWD_SET_MODEL_LIGHTING = 1,
	HWD_SET_SHADERS,
	HWD_SET_TEXTUREFILTERMODE,
	HWD_SET_TEXTUREANISOTROPICMODE,
	HWD_NUMSTATE
};

typedef enum hwdsetspecialstate hwdspecialstate_t;

// Lactozilla: Shader info
// Generally set at the start of the frame.
enum hwdshaderinfo
{
	HWD_SHADERINFO_LEVELTIME = 1,
};

typedef enum hwdshaderinfo hwdshaderinfo_t;

enum hwdfiltermode
{
	HWD_SET_TEXTUREFILTER_POINTSAMPLED,
	HWD_SET_TEXTUREFILTER_BILINEAR,
	HWD_SET_TEXTUREFILTER_TRILINEAR,
	HWD_SET_TEXTUREFILTER_MIXED1,
	HWD_SET_TEXTUREFILTER_MIXED2,
	HWD_SET_TEXTUREFILTER_MIXED3,
};


#endif //_HWR_DEFS_