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Gmt module: Structures, representing GMT entities.

ObjPtr
Michael Uleysky 9 years ago
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  1. 135
      modules/gmt/colortransform.h
  2. 382
      modules/gmt/modgmt_structs.h

135
modules/gmt/colortransform.h
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// From grayscale
struct gmt_color Gray2RGB() const
{
struct gmt_color color;
color.transparency=transparency;
color.model=RGB;
color.r=color.g=color.b=gray;
return color;
}
struct gmt_color Gray2HSV() const
{
struct gmt_color color;
color.transparency=transparency;
color.model=HSV;
color.hue=0;
color.saturation=0;
color.value=gray/255.0;
return color;
}
struct gmt_color Gray2CMYK() const
{
struct gmt_color color;
color.transparency=transparency;
color.model=CMYK;
color.cyan=color.magenta=color.yellow=0;
color.black=(1.0-gray/255.0)*100.0;
return color;
}
// From RGB
struct gmt_color RGB2Gray() const
{
struct gmt_color color;
color.transparency=transparency;
color.model=GRAY;
color.gray=0.2126*r+0.7152*g+0.0722*b;
return color;
}
struct gmt_color RGB2HSV() const
{
struct gmt_color color;
color.transparency=transparency;
color.model=HSV;
double rr=r/255.0,gg=g/255.0,bb=b/255.0;
double cmax=std::max(rr,std::max(gg,bb));
double cmin=std::min(rr,std::min(gg,bb));
double delta=cmax-cmin;
if(0==delta) color.hue=0;
else if(cmax==rr)
{
double x=(gg-bb)/delta;
color.hue=x-floor(x/6.0)*6.0;
}
else if(cmax==gg) color.hue=(bb-rr)/delta+2.0;
else if(cmax==bb) color.hue=(rr-gg)/delta+4.0;
color.hue*=60.0;
color.saturation=(0==cmax)?0:(delta/cmax);
color.value=cmax;
return color;
}
struct gmt_color RGB2CMYK() const
{
struct gmt_color color;
color.transparency=transparency;
color.model=CMYK;
double rr=r/255.0,gg=g/255.0,bb=b/255.0;
double k=1.0-std::max(rr,std::max(gg,bb));
color.black=k;
color.cyan=(1.0-rr-k)/(1.0-k);
color.magenta=(1.0-gg-k)/(1.0-k);
color.yellow=(1.0-bb-k)/(1.0-k);
if(0.0==1.0-k) color.cyan=color.magenta=color.yellow=0.0;
color.black*=100.0;
color.cyan*=100.0;
color.magenta*=100.0;
color.yellow*=100.0;
return color;
}
// From HSV
struct gmt_color HSV2Gray() const
{
return HSV2RGB().RGB2Gray();
}
struct gmt_color HSV2RGB() const
{
struct gmt_color color;
color.transparency=transparency;
color.model=RGB;
double c=saturation*value;
double x=c*(1.0-fabs((hue/60.0)-floor((hue/60.0)/2.0)*2.0-1.0));
double m=value-c;
if(0.0 <=hue && 60.0 >hue) {color.r=c; color.g=x; color.b=0;}
if(60.0 <=hue && 120.0>hue) {color.r=x; color.g=c; color.b=0;}
if(120.0<=hue && 180.0>hue) {color.r=0; color.g=c; color.b=x;}
if(180.0<=hue && 240.0>hue) {color.r=0; color.g=x; color.b=c;}
if(240.0<=hue && 300.0>hue) {color.r=x; color.g=0; color.b=c;}
if(300.0<=hue &&360.0>=hue) {color.r=c; color.g=0; color.b=x;}
color.r+=m; color.g+=m; color.b+=m;
color.r*=255; color.g*=255; color.b*=255;
return color;
}
struct gmt_color HSV2CMYK() const
{
return HSV2RGB().RGB2CMYK();
}
// From CMYK
struct gmt_color CMYK2Gray() const
{
return CMYK2RGB().RGB2Gray();
}
struct gmt_color CMYK2RGB() const
{
struct gmt_color color;
color.transparency=transparency;
color.model=RGB;
double cc=cyan/100.0,mm=magenta/100.0,yy=yellow/100.0,kk=black/100.0;
color.r=255.0*(1.0-cc)*(1.0-kk);
color.g=255.0*(1.0-mm)*(1.0-kk);
color.b=255.0*(1.0-yy)*(1.0-kk);
return color;
}
struct gmt_color CMYK2HSV() const
{
return CMYK2RGB().RGB2HSV();
}

382
modules/gmt/modgmt_structs.h
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#ifndef MODGMT_STRUCT_H
#define MODGMT_STRUCT_H
#include <cinttypes>
// Coordinate
struct gmt_coord
{
bool isdeg;
union
{
double r;
struct
{
bool sign;
uint16_t d;
uint8_t m;
double s;
};
};
std::string Value() const
{
if(!isdeg) return std::to_string(r);
else return (sign?"":"-")+std::to_string(d)+":"+std::to_string(m)+(s==0?"":":"+std::to_string(s));
}
operator double() const
{
if(isdeg) return (d+(m+s/60.0)/60.0)*(sign?1:-1);
else return r;
}
bool Convert(const std::string& str)
{
size_t bpos=0,pos=str.find(':');
if(std::string::npos==pos)
{
isdeg=false;
return str2double(str,&r);
}
isdeg=true;
int64_t res;
// degrees
if(! str2int(std::string(str.c_str(),str.c_str()+pos),&res) ) return false;
if(res>360 || res<-360) res%=360;
sign=(std::string::npos==str.find('-'));
d=static_cast<uint16_t>(sign?res:-res);
// minutes
bpos=pos+1;
pos=str.find(':',bpos);
if(std::string::npos==pos)
{
if(!str2int(str.substr(bpos),&res)) return false;
if(res<0 || res>=60) return false;
m=static_cast<uint8_t>(res);
s=0;
return true;
}
if(! str2int(std::string(str.c_str()+bpos,str.c_str()+pos),&res) ) return false;
if(res<0 || res>=60) return false;
m=static_cast<uint8_t>(res);
// seconds
if(! str2double(str.substr(pos+1),&s) ) return false;
if(s<0.0 || s>=60.0) return false;
return true;
}
bool Convert(double num)
{
isdeg=false;
r=num;
return true;
}
};
// Region
struct gmt_region
{
enum Type {NORMAL,BBOX,GLOBAL360,GLOBAL180};
Type type;
struct gmt_coord xb,xe,yb,ye;
std::string Value() const
{
switch(type)
{
case(NORMAL): return std::string("-R")+xb.Value()+"/"+xe.Value()+"/"+yb.Value()+"/"+ye.Value();
case(BBOX): return std::string("-R")+xb.Value()+"/"+yb.Value()+"/"+xe.Value()+"/"+ye.Value()+"r";
case(GLOBAL360): return "-Rg";
case(GLOBAL180): return "-Rd";
}
return "";
}
// Only "global", "global180" and "global360"
// TODO: add parsing of "-R" strings
bool Convert(const std::string& istr)
{
std::string str=istr;
tolower(str);
if("global180"==str)
{
type=GLOBAL180;
xb.Convert(-180.0); xe.Convert(180.0);
yb.Convert(-90.0); ye.Convert(90.0);
return true;
}
if("global360"==str || "global"==str)
{
type=GLOBAL360;
xb.Convert(0.0); xe.Convert(360.0);
yb.Convert(-90.0); ye.Convert(90.0);
return true;
}
return false;
}
// Make by coordinates
bool Convert(struct gmt_coord ixb, struct gmt_coord ixe, struct gmt_coord iyb, struct gmt_coord iye, bool isbbox=false)
{
type=isbbox?BBOX:NORMAL;
xb=ixb; yb=iyb; xe=ixe; ye=iye;
return true;
}
};
// Projection
struct gmt_projection
{
// OBLIQMERCATOR types
enum class OType {A,B,C};
// No UTM (-Ju)
enum projection {XY,CYL_EQU,MERCATOR,TRANSMERCATOR,OBLIQMERCATOR,CASSINI,CYL_EQA,MILLER,CYL_STERE};
// Real size in cm of drawing area
double rwidth,rheight;
struct gmt_region region;
projection proj;
double width; // parameter of projection
union // other projection parameters
{
// XY
struct {double height;} x;
// Cylindrical projections
// CYL_EQU (Cylindrical Equidistant -Jq)
struct {double stpar,cmer;} q;
// MERCATOR (-Jm)
struct {double stpar,cmer;} m;
// TRANSMERCATOR (-Jt)
struct {double cmer,orlat,scale;} t;
// OBLIQMERCATOR (-Jo)
struct
{
OType type;
double clon,clat;
union
{
double azimuth; // A
struct {double eqlon,eqlat;}; // B
struct {double polelon,polelat;}; // C
};
} o;
// CASSINI (-Jc)
struct {double clon,clat;} c;
// CYL_EQA (Cylindrical equal-area -Jy)
struct {double stpar,cmer;} y;
// MILLER (-Jj)
struct {double cmer;} j;
// CYL_STERE (Cylindrical stereographic -Jcyl_stere)
struct {double stpar,cmer;} cyl_stere;
};
std::string Value() const
{
switch(proj)
{
case(XY): return "-JX"+std::to_string(width)+"c/"+std::to_string(x.height)+"c";
case(CYL_EQU): return "-JQ"+std::to_string(q.cmer)+"/"+std::to_string(q.stpar)+"/"+std::to_string(width)+"c";
case(MERCATOR): return "-JM"+std::to_string(m.cmer)+"/"+std::to_string(m.stpar)+"/"+std::to_string(width)+"c";
case(TRANSMERCATOR): return "-JT"+std::to_string(t.cmer)+"/"+std::to_string(t.orlat)+"/"+std::to_string(width)+"c --PROJ_SCALE_FACTOR="+std::to_string(t.scale);
case(OBLIQMERCATOR):
{
switch(o.type)
{
case(OType::A): return "-JOa"+std::to_string(o.clon)+"/"+std::to_string(o.clat)+"/"+std::to_string(o.azimuth)+"/"+std::to_string(width)+"c";
case(OType::B): return "-JOb"+std::to_string(o.clon)+"/"+std::to_string(o.clat)+"/"+std::to_string(o.eqlon)+"/"+std::to_string(o.eqlat)+"/"+std::to_string(width)+"c";
case(OType::C): return "-JOb"+std::to_string(o.clon)+"/"+std::to_string(o.clat)+"/"+std::to_string(o.polelon)+"/"+std::to_string(o.polelat)+"/"+std::to_string(width)+"c";
}
}
case(CASSINI): return "-JC"+std::to_string(c.clon)+"/"+std::to_string(c.clat)+"/"+std::to_string(width)+"c";
case(CYL_EQA): return "-JY"+std::to_string(y.stpar)+"/"+std::to_string(y.cmer)+"/"+std::to_string(width)+"c";
case(MILLER): return "-JJ"+std::to_string(j.cmer)+"/"+std::to_string(width)+"c";
case(CYL_STERE): return "-JCyl_stere"+std::to_string(cyl_stere.stpar)+"/"+std::to_string(cyl_stere.cmer)+"/"+std::to_string(width)+"c";
}
return "";
}
};
// Color
struct gmt_color
{
enum ColorModel {RGB,GRAY,HSV,CMYK};
ColorModel model;
union
{
double gray; // 0-255
struct {double r,g,b;}; // 0-255
struct {double hue,saturation,value;}; // 0-360, 0-1, 0-1
struct {double cyan,magenta,yellow,black;}; // 0-100
};
double transparency;
std::string Value() const
{
std::string trans=(transparency!=0)?("@"+std::to_string(transparency)):"";
switch(model)
{
case(RGB): return std::to_string(r)+"/"+std::to_string(g)+"/"+std::to_string(b)+trans;
case(GRAY): return std::to_string(gray)+trans;
case(HSV): return std::to_string(hue)+"-"+std::to_string(saturation)+"-"+std::to_string(value)+trans;
case(CMYK): return std::to_string(cyan)+"/"+std::to_string(magenta)+"/"+std::to_string(yellow)+"/"+std::to_string(black)+trans;
}
return "";
}
double Gray() const
{
switch(model)
{
case(RGB): return RGB2Gray().gray;
case(GRAY): return gray;
case(HSV): return HSV2Gray().gray;
case(CMYK): return CMYK2Gray().gray;
}
return 0;
}
double R() const
{
switch(model)
{
case(RGB): return r;
case(GRAY): return Gray2RGB().r;
case(HSV): return HSV2RGB().r;
case(CMYK): return CMYK2RGB().r;
}
return 0;
}
double G() const
{
switch(model)
{
case(RGB): return g;
case(GRAY): return Gray2RGB().g;
case(HSV): return HSV2RGB().g;
case(CMYK): return CMYK2RGB().g;
}
return 0;
}
double B() const
{
switch(model)
{
case(RGB): return b;
case(GRAY): return Gray2RGB().b;
case(HSV): return HSV2RGB().b;
case(CMYK): return CMYK2RGB().b;
}
return 0;
}
double H() const
{
switch(model)
{
case(RGB): return RGB2HSV().hue;
case(GRAY): return Gray2HSV().hue;
case(HSV): return hue;
case(CMYK): return CMYK2HSV().hue;
}
return 0;// Own functions
}
double S() const
{
switch(model)
{
case(RGB): return RGB2HSV().saturation;
case(GRAY): return Gray2HSV().saturation;
case(HSV): return saturation;
case(CMYK): return CMYK2HSV().saturation;
}
return 0;
}
double V() const
{
switch(model)
{
case(RGB): return RGB2HSV().value;
case(GRAY): return Gray2HSV().value;
case(HSV): return value;
case(CMYK): return CMYK2HSV().value;
}
return 0;
}
double C() const
{
switch(model)
{
case(RGB): return RGB2CMYK().cyan;
case(GRAY): return Gray2CMYK().cyan;
case(HSV): return HSV2CMYK().cyan;
case(CMYK): return cyan;
}
return 0;
}
double M() const
{
switch(model)
{
case(RGB): return RGB2CMYK().magenta;
case(GRAY): return Gray2CMYK().magenta;
case(HSV): return HSV2CMYK().magenta;
case(CMYK): return magenta;
}
return 0;
}
double Y() const
{
switch(model)
{
case(RGB): return RGB2CMYK().yellow;
case(GRAY): return Gray2CMYK().yellow;
case(HSV): return HSV2CMYK().yellow;
case(CMYK): return yellow;
}
return 0;
}
double K() const
{
switch(model)
{
case(RGB): return RGB2CMYK().black;
case(GRAY): return Gray2CMYK().black;
case(HSV): return HSV2CMYK().black;
case(CMYK): return black;
}
return 0;
}
// Transformation functions
private:
#include "colortransform.h"
};
// Dash
struct gmt_dash
{
std::vector<double> dash;
double shift;
std::string Value() const
{
std::string ret;
if(dash.empty()) return ret;
for(auto i:dash) ret+=std::to_string(i)+"_";
ret.back()=':';
ret+=std::to_string(shift)+"c";
return ret;
}
operator bool() const {return !dash.empty();}
};
// Pen
struct gmt_pen
{
double width;
struct gmt_color color;
struct gmt_dash dash;
std::string Value() const {return std::to_string(width)+","+color.Value()+(dash?(","+dash.Value()):"");}
};
#endif
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