//  colour.h
//
//  by John D. de Boer


enum {

//  125-colour palette scheme

black=0,midnightblue,sapphire,aad,blue,darkgreen,pewter,abc,ultramarine,abe,forestgreen,
malachite,acc,acd,medblue,ada,emerald,teal,aqua,lightblue,green,aeb,seagreen,seafoam,cyan,

oxblood,darkplum,bac,indigo,bae,darkolive,darkgrey,navy,bbd,royalblue,bca,jade,bcc,
bce,greyblue,bdb,leafgreen,bdd,greygreen,bea,skyblue,bec,kellygreen,bee,turquoise,

rust,grape,plum,cad,purple,sienna,mahogany,cbc,orchid,cbe,olive,ccb,grey,ccd,
periwinkle,cda,sagegreen,cdc,cdd,cde,limegreen,ceb,lightgreen,ced,robinsegg,

brickred,crimson,dac,violet,brightpurple,burntorange,dbb,dbc,dbd,dbe,dca,lightbrown,
taupe,mauve,lavender,lightolive,ddb,khaki,lightgrey,babyblue,dea,chartreuse,honeydew,palegreen,dee,

red,vermilion,fuchsia,ead,magenta,sarasota,ebb,watermelon,pink,ebe,orange,peach,
dustyrose,rose,lilac,goldenrod,apricot,coral,palerose,lightmauve,yellow,lightyellow,paleyellow,eed,white,

//  other useful colours

beige,brown,medbrown,chestnut,terracotta,

MAXCOLOUR };


//  Initialisation

void initcolour(void);


//  Quartz colour utilities

typedef struct {
float c[4];
} colour;

void rgb2colour(const RGBColor *RGB, colour *C);
void setrgb(colour *C, float R, float G, float B);
void setcolour(colour *C, int COLOUR);
void greyshade(colour *C, float G);
void setalpha(colour *C, float F);
void mix(float F, const colour *A, const colour *B, colour *C);
void mixindex(float F, int A, int B, colour *C);
void shadecolour(colour *A, float Shade);

bool darkcolour(const colour *C);
bool verydarkcolour(const colour *C);

bool parsecolourname(const char *S, colour *C);