//-----------------------------------------------------------------------------
// ShaderFlags
//-----------------------------------------------------------------------------

#ifndef __SHADERFLAGS_H__
#define __SHADERFLAGS_H__

/**
 * Transform functions.
 */
enum FUNC
{
  FUNC_CONST,
  FUNC_SIN,
  FUNC_TRIANGLE,
  FUNC_SQUARE,
  FUNC_SAWTOOTH,
  FUNC_INVERSESAWTOOTH,
  FUNC_NOISE
};

/**
 * Functions for generating and deforming vertexes.
 */
enum RGBGEN
{
  RGBGEN_NONE,
  RGBGEN_IDENTITY_LIGHTING, /**< 0 */
  RGBGEN_IDENTITY,          /**< 0 */
  RGBGEN_WAVE,              /**< 5 */
  RGBGEN_ENTITY,            /**< 0 */
  RGBGEN_ONE_MINUS_ENTITY,  /**< 0 */
  RGBGEN_VERTEX,            /**< 0 */
  RGBGEN_EXACTVERTEX,
  RGBGEN_ONE_MINUS_VERTEX,  /**< 0 */
  RGBGEN_LIGHTING_DIFFUSE,  /**< 0 */
  RGBGEN_FLARE,
  RGBGEN_FOG,
  RGBGEN_CONST,
  RGBGEN_MATERIAL
};

/**
 * Alpha channel generation.
 */
enum ALPHAGEN
{
  ALPHAGEN_NONE,
  ALPHAGEN_PORTAL,
  ALPHAGEN_IDENTITY,
  ALPHAGEN_CONST,
  ALPHAGEN_VERTEX,
  ALPHAGEN_ENTITY,
  ALPHAGEN_SPECULAR,
  ALPHAGEN_WAVE
};

/**
 * Texture coordinate generation.
 */
enum TCGEN
{
  TCGEN_BASE,           /**< 0 */
  TCGEN_ENVIRONMENT,    /**< 0 */
  TCGEN_LIGHTMAP,       /**< 0 */
  TCGEN_VECTOR,         /**< 6 */
  TCGEN_FOG
};

/**
 * Texture coordinate deformation.
 */
enum TCMOD
{
  SP_TCMOD_NONE   = 0,
  TCMOD_ROTATE    = 1,
  TCMOD_SCALE     = 2,
  TCMOD_SCROLL    = 3,
  TCMOD_STRETCH   = 4,
  TCMOD_TRANSFORM = 5,
  TCMOD_TURB      = 6,
};

/**
 * Vertes coordinates deformations.
 * @see DeformVertexes
 */
enum DEFORMVERTEXES
{
  DEFORMVERTEXES_NONE         = 0,      /**< 0 parameters */
  DEFORMVERTEXES_WAVE         = 1,      /**< 6 parameters */
  DEFORMVERTEXES_NORMAL       = 2,      /**< 5 parameters */
  DEFORMVERTEXES_BULGE        = 3,      /**< 3 parameters */
  DEFORMVERTEXES_MOVE         = 4,      /**< 8 parameters */
  DEFORMVERTEXES_AUTOSPRITE   = 5,      /**< 0 parameters */
  DEFORMVERTEXES_AUTOSPRITE2  = 6,      /**< 0 parameters */
};

/**
 * Layer flags.
 */
enum
{
  LF_NOMIPMAP   = 0x01,   /**< do not create mipmaps */
  LF_NOPICMIP   = 0x02,   /**< allways pick the highest mipmap */
  LF_CLAMP      = 0x04,   /**< clamp, default is repeat */
  LF_DETAIL     = 0x08,   /**< detail texture */
  LF_LIGHTMAP   = 0x10,   /**< lightmap */
  LF_HASTCMOD   = 0x20,
  LF_USENORMALS = 0x40,
  LF_MULTITEX   = 0x80    /**< this shader and the next could be collapsed */
};

enum
{                                               // val << 16
  SORT_PORTAL         = 1,                      // 0x10000
  SORT_SKY            = 2,                      // 0x20000
  SORT_NORMAL         = 3, SORT_OPAQUE = 3,     // 0x30000
  SORT_DECAL          = 4,                      // 0x40000
  SORT_UNDERBANNER    = 5,                      // 0x50000
  SORT_BANNER         = 6,                      // 0x60000
  SORT_TRANS          = 7, SORT_SEETHROUGH = 7, // 0x70000
  SORT_UNDERWATER     = 8,                      // 0x80000
  SORT_ADDITIVE       = 9,                      // 0x90000
  SORT_ADDITIVE1      = 10, /**< ¿? */          // 0xA0000
  SORT_ADDITIVE2      = 11,                     // 0xB0000
  SORT_FOG            = 12,                     // 0xC0000
  SORT_FOG1           = 13, /**< ¿? */          // 0xD0000
  SORT_FOG2           = 14, /**< ¿? */          // 0xE0000
  SORT_STENCILSHADOW  = 15, /**< ¿? taken from shaderlib */   // 0xF0000
  SORT_NEAREST        = 16,                   // 0x100000
};

/**
 * Culling type.
 */
enum
{
  CULL_FRONT  = 1,
  CULL_BACK   = -1,
  CULL_NONE   = 0,
};

/**
 * Shader flags.
 */
enum
{
  SF_NOMIPMAP       = (1<<1), /**< do not create mipmaps */
  SF_NOPICMIP       = (1<<2), /**< allways pick the highest mipmap */
  SF_POLYGONOFFSET  = (1<<3), /**< surface needs polygon offset */
  SF_PORTAL         = (1<<4), /**< there is a portal layer */
  SF_HASLIGHTMAP    = (1<<5), /**< there is a lightmap layer */
  SF_HASCOLORS      = (1<<6), /**< there is a layer that needs colors */
  SF_HASTCMOD       = (1<<7), /**< there is a layer that has lf_hastcmod */
  SF_USENORMALS     = (1<<8), /**< there is a layer that has lf_usenormals */
  SF_MULTITEX       = (1<<9), /**< this shader has two layers that can be collapsed */
};

/**
 * Face types.
 */
enum
{
  FACETYPE_NORMAL = 1,
  FACETYPE_PLANAR = 1,    /**< the same as above */
  FACETYPE_PATCH  = 2,
  FACETYPE_MESH   = 3,
  FACETYPE_FLARE  = 4
};

#endif  /* __SHADERFLAGS_H__ */