gmt-makemap/modules/gmt/modgmt_internals.h

#ifndef MODGMT_INTERNALS_H
#define MODGMT_INTERNALS_H
#include <gmt.h>
#include <string.h>
#include "modgmt_filters.h"
#include "modgmt_structs.h"

// here we save header and footer of gmt-produced eps files
extern std::string header,footer;
extern const int GMTMODE;

// Parameters for working thread
struct gmtworkthreadpars
{
 void* api;
 const char* module;
 struct GMT_OPTION* opts;
 int fd;
 int ret;
};

// Calling GMT module with filtering
int callgmtmodule(void *api, const char *module, struct GMT_OPTION *opts, std::string* res, gmt_filter filt=gmt_filter_default, void* filtpar=0);
int callgmtmodule(void *api, const char *module, const std::string& opts, std::string* res, gmt_filter filt=gmt_filter_default, void* filtpar=0);
int callgmtmodule(void *api, const char *module, const char* opts, std::string* res, gmt_filter filt=gmt_filter_default, void* filtpar=0);

// Workaround non-const pointer in GMT_Create_Options
inline struct GMT_OPTION* str2options(void *api, const char* str, size_t size=0)
{
 static char default_gmt_options[]="--GMT_HISTORY=f --PS_LINE_CAP=round --PS_LINE_JOIN=round --GMT_COMPATIBILITY=5 --PS_PAGE_ORIENTATION=portrait --PS_IMAGE_COMPRESS=deflate,9 --PROJ_LENGTH_UNIT=cm";
 char* t;
 if(0==size) t=strdup(str);
 else
 {
  t=static_cast<char*>(malloc(size+1));
  memcpy(t,str,size);
  t[size]=0;
 }
 struct GMT_OPTION* opts=GMT_Create_Options(api,0,t);
 GMT_Append_Option(api,GMT_Create_Options(api,0,default_gmt_options),opts);
 free(t);
 return opts;
}
inline struct GMT_OPTION* str2options(void *api, const std::string& str)
{
 return str2options(api,str.data(),str.length());
}

// Calculate real width and height of projection. If height!=0 recalculate width accordingly.
bool ProjectionRealSize(struct gmt_projection& p, double height=0.0);

#endif