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#ifndef NUP_H_
#define NUP_H_
#include "pptypes.h"
#include <utility>
// you have to provide this
struct NupParameters {
NupParameters()
: nupX(1),nupY(1),
width(NAN),height(NAN),
landscape(false),
first(X),
xstart(LEFT),ystart(TOP),
xalign(CENTER),yalign(CENTER)
{}
// --- "calculated" parameters ---
int nupX,nupY;
float width,height;
bool landscape; // post-rotate!
// --- other settings ---
// ordering
Axis first;
Position xstart,ystart;
Position xalign,yalign;
static bool possible(int nup); // TODO? float in_ratio,float out_ratio
static void preset(int nup,NupParameters &ret);
static float calculate(int nup, float in_ratio, float out_ratio,NupParameters &ret); // returns "quality", 1 is best
void dump() const;
};
// you get this
struct NupPageEdit {
// required transformation: first translate, then scale
float xpos,ypos; // TODO: already given by sub.left,sub.bottom [but for rotation?]
float scale; // uniform
// ? "landscape" e.g. to rotate labels
// for border, clip, ...
// also stores in_width/in_height, unscaled!
// everything in "outer"-page coordinates
PageRect sub;
void dump() const;
};
/*
This class does the number-up calculation. Example:
NupParameters param;
param.xyz=...; // fill it with your data!
NupState nup(param);
NupPageEdit edit;
for (auto page : your_pages) {
bool newPage=nup.nextPage(page.w,page.h,edit); // w,h from input page
// create newPage, if required; then place current page as specified in edit
}
*/
class NupState {
public:
NupState(const NupParameters ¶m);
void reset();
// will overwrite ret with the new parameters
// returns true, if a new output page should be started first
bool nextPage(float in_width,float in_height,NupPageEdit &ret);
private:
std::pair<int,int> convert_order(int subpage) const;
void calculate_edit(int subx,int suby,NupPageEdit &ret) const;
private:
NupParameters param;
int in_pages,out_pages;
int nup; // max. per page (==nupX*nupY)
int subpage; // on the current output-page
};
// TODO? elsewhere
// parsing functions for cups parameters (will not calculate nupX,nupY!)
bool parseNupLayout(const char *val,NupParameters &ret); // lrtb, btlr, ...
#endif
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