r_qshader.h

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#ifndef QSHADER_H
#define QSHADER_H
 
#include "qtypes.h"
 
// various flags from shaders, used for special effects not otherwise classified
// TODO: support these features more directly
#define Q3TEXTUREFLAG_TWOSIDED 1
#define Q3TEXTUREFLAG_NOPICMIP 16
#define Q3TEXTUREFLAG_POLYGONOFFSET 32
#define Q3TEXTUREFLAG_REFRACTION 256
#define Q3TEXTUREFLAG_REFLECTION 512
#define Q3TEXTUREFLAG_WATERSHADER 1024
#define Q3TEXTUREFLAG_CAMERA 2048
#define Q3TEXTUREFLAG_TRANSPARENTSORT 4096
 
#define Q3PATHLENGTH 64
#define TEXTURE_MAXFRAMES 64
#define Q3WAVEPARMS 4
#define Q3DEFORM_MAXPARMS 3
#define Q3SHADER_MAXLAYERS 8
#define Q3RGBGEN_MAXPARMS 3
#define Q3ALPHAGEN_MAXPARMS 1
#define Q3TCGEN_MAXPARMS 6
#define Q3TCMOD_MAXPARMS 6
#define Q3MAXTCMODS 8
#define Q3MAXDEFORMS 4
 
typedef enum q3wavefunc_e
{
    Q3WAVEFUNC_NONE,
    Q3WAVEFUNC_INVERSESAWTOOTH,
    Q3WAVEFUNC_NOISE,
    Q3WAVEFUNC_SAWTOOTH,
    Q3WAVEFUNC_SIN,
    Q3WAVEFUNC_SQUARE,
    Q3WAVEFUNC_TRIANGLE,
    Q3WAVEFUNC_COUNT
}
q3wavefunc_e;
typedef int q3wavefunc_t;
#define Q3WAVEFUNC_USER_COUNT 4
#define Q3WAVEFUNC_USER_SHIFT 8 // use 8 bits for wave func type
 
typedef enum q3deform_e
{
    Q3DEFORM_NONE,
    Q3DEFORM_PROJECTIONSHADOW,
    Q3DEFORM_AUTOSPRITE,
    Q3DEFORM_AUTOSPRITE2,
    Q3DEFORM_TEXT0,
    Q3DEFORM_TEXT1,
    Q3DEFORM_TEXT2,
    Q3DEFORM_TEXT3,
    Q3DEFORM_TEXT4,
    Q3DEFORM_TEXT5,
    Q3DEFORM_TEXT6,
    Q3DEFORM_TEXT7,
    Q3DEFORM_BULGE,
    Q3DEFORM_WAVE,
    Q3DEFORM_NORMAL,
    Q3DEFORM_MOVE,
    Q3DEFORM_COUNT
}
q3deform_t;
 
typedef enum q3rgbgen_e
{
    Q3RGBGEN_IDENTITY,
    Q3RGBGEN_CONST,
    Q3RGBGEN_ENTITY,
    Q3RGBGEN_EXACTVERTEX,
    Q3RGBGEN_IDENTITYLIGHTING,
    Q3RGBGEN_LIGHTINGDIFFUSE,
    Q3RGBGEN_ONEMINUSENTITY,
    Q3RGBGEN_ONEMINUSVERTEX,
    Q3RGBGEN_VERTEX,
    Q3RGBGEN_WAVE,
    Q3RGBGEN_COUNT
}
q3rgbgen_t;
 
typedef enum q3alphagen_e
{
    Q3ALPHAGEN_IDENTITY,
    Q3ALPHAGEN_CONST,
    Q3ALPHAGEN_ENTITY,
    Q3ALPHAGEN_LIGHTINGSPECULAR,
    Q3ALPHAGEN_ONEMINUSENTITY,
    Q3ALPHAGEN_ONEMINUSVERTEX,
    Q3ALPHAGEN_PORTAL,
    Q3ALPHAGEN_VERTEX,
    Q3ALPHAGEN_WAVE,
    Q3ALPHAGEN_COUNT
}
q3alphagen_t;
 
typedef enum q3tcgen_e
{
    Q3TCGEN_NONE,
    Q3TCGEN_TEXTURE, // very common
    Q3TCGEN_ENVIRONMENT, // common
    Q3TCGEN_LIGHTMAP,
    Q3TCGEN_VECTOR,
    Q3TCGEN_COUNT
}
q3tcgen_t;
 
typedef enum q3tcmod_e
{
    Q3TCMOD_NONE,
    Q3TCMOD_ENTITYTRANSLATE,
    Q3TCMOD_ROTATE,
    Q3TCMOD_SCALE,
    Q3TCMOD_SCROLL,
    Q3TCMOD_STRETCH,
    Q3TCMOD_TRANSFORM,
    Q3TCMOD_TURBULENT,
    Q3TCMOD_PAGE,
    Q3TCMOD_COUNT
}
q3tcmod_t;
 
typedef struct q3shaderinfo_layer_rgbgen_s
{
    q3rgbgen_t rgbgen;
    float parms[Q3RGBGEN_MAXPARMS];
    q3wavefunc_t wavefunc;
    float waveparms[Q3WAVEPARMS];
}
q3shaderinfo_layer_rgbgen_t;
 
typedef struct q3shaderinfo_layer_alphagen_s
{
    q3alphagen_t alphagen;
    float parms[Q3ALPHAGEN_MAXPARMS];
    q3wavefunc_t wavefunc;
    float waveparms[Q3WAVEPARMS];
}
q3shaderinfo_layer_alphagen_t;
 
typedef struct q3shaderinfo_layer_tcgen_s
{
    q3tcgen_t tcgen;
    float parms[Q3TCGEN_MAXPARMS];
}
q3shaderinfo_layer_tcgen_t;
 
typedef struct q3shaderinfo_layer_tcmod_s
{
    q3tcmod_t tcmod;
    float parms[Q3TCMOD_MAXPARMS];
    q3wavefunc_t wavefunc;
    float waveparms[Q3WAVEPARMS];
}
q3shaderinfo_layer_tcmod_t;
 
typedef struct q3shaderinfo_layer_s
{
    int alphatest;
    int clampmap;
    float framerate;
    int numframes;
    int dptexflags;
    char** texturename;
    int blendfunc[2];
    q3shaderinfo_layer_rgbgen_t rgbgen;
    q3shaderinfo_layer_alphagen_t alphagen;
    q3shaderinfo_layer_tcgen_t tcgen;
    q3shaderinfo_layer_tcmod_t tcmods[Q3MAXTCMODS];
}
q3shaderinfo_layer_t;
 
typedef struct q3shaderinfo_deform_s
{
    q3deform_t deform;
    float parms[Q3DEFORM_MAXPARMS];
    q3wavefunc_t wavefunc;
    float waveparms[Q3WAVEPARMS];
}
q3shaderinfo_deform_t;
 
typedef enum dpoffsetmapping_technique_s
{
    OFFSETMAPPING_OFF,         // none
    OFFSETMAPPING_DEFAULT,     // cvar-set
    OFFSETMAPPING_LINEAR,       // linear
    OFFSETMAPPING_RELIEF        // relief
}dpoffsetmapping_technique_t;
 
typedef enum dptransparentsort_category_e
{
    TRANSPARENTSORT_SKY,
    TRANSPARENTSORT_DISTANCE,
    TRANSPARENTSORT_HUD,
}dptransparentsortcategory_t;
 
typedef struct shader_s
{
    char name[Q3PATHLENGTH];
#define Q3SHADERINFO_COMPARE_START surfaceparms
    int surfaceparms;
    int surfaceflags;
    int textureflags;
    int numlayers;
    qbool lighting;
    qbool vertexalpha;
    qbool textureblendalpha;
    q3shaderinfo_layer_t layers[Q3SHADER_MAXLAYERS];
    char skyboxname[Q3PATHLENGTH];
    q3shaderinfo_deform_t deforms[Q3MAXDEFORMS];
 
    // dp-specific additions:
 
    // shadow control
    qbool dpnortlight;
    qbool dpshadow;
    qbool dpnoshadow;
 
    // add collisions to all triangles of the surface
    qbool dpmeshcollisions;
 
    // kill shader based on cvar checks
    qbool dpshaderkill;
 
    // fake reflection
    char dpreflectcube[Q3PATHLENGTH];
 
    // reflection
    float reflectmin; // when refraction is used, minimum amount of reflection (when looking straight down)
    float reflectmax; // when refraction is used, maximum amount of reflection (when looking parallel to water)
    float refractfactor; // amount of refraction distort (1.0 = like the cvar specifies)
    vec4_t refractcolor4f; // color tint of refraction (including alpha factor)
    float reflectfactor; // amount of reflection distort (1.0 = like the cvar specifies)
    vec4_t reflectcolor4f; // color tint of reflection (including alpha factor)
    float r_water_wateralpha; // additional wateralpha to apply when r_water is active
    float r_water_waterscroll[2]; // water normalmapscrollblend - scale and speed
 
    // offsetmapping
    dpoffsetmapping_technique_t offsetmapping;
    float offsetscale;
    float offsetbias; // 0 is normal, 1 leads to alpha 0 being neutral and alpha 1 pushing "out"
 
    // polygonoffset (only used if Q3TEXTUREFLAG_POLYGONOFFSET)
    float biaspolygonoffset, biaspolygonfactor;
 
    // transparent sort category
    dptransparentsortcategory_t transparentsort;
 
    // gloss
    float specularscalemod;
    float specularpowermod;
 
    // rtlighting ambient addition
    float rtlightambient;
#define Q3SHADERINFO_COMPARE_END rtlightambient
}
shader_t;
 
typedef struct texture_shaderpass_s
{
    qbool alphatest; // FIXME: handle alphafunc properly
    float framerate;
    int numframes;
    struct skinframe_s *skinframes[TEXTURE_MAXFRAMES];
    int blendfunc[2];
    q3shaderinfo_layer_rgbgen_t rgbgen;
    q3shaderinfo_layer_alphagen_t alphagen;
    q3shaderinfo_layer_tcgen_t tcgen;
    q3shaderinfo_layer_tcmod_t tcmods[Q3MAXTCMODS];
}
texture_shaderpass_t;
 
#endif