astrometry.net 0.46-0ubuntu2 / usr / include / astrometry / plotimage.h

#ifndef PLOTIMAGE_H
#define PLOTIMAGE_H

#include "plotstuff.h"
#include "anwcs.h"

struct plotimage_args {
	char* fn;
	int format; // PLOTSTUFF_FORMAT_*

	// Use slow but correct resampling?
	// default is to use faster but approximate Cairo rendering.
	anbool resample;

	int downsample;

	// 
	double arcsinh;

	double rgbscale[3];

	double alpha;

	anwcs_t* wcs;
	double gridsize;

	// Only used when WCS is *not* set: scales the image by the given factors.
	//double scalex;
	//double scaley;

	// For FITS images: values that will be linearly transformed to 0,255.
	double image_low;
	double image_high;
	// image value that will be made transparent.
	double image_null;

	// image values outside this range will be made transparent
	// (if non-zero)
	double image_valid_low;
	double image_valid_high;

	int n_invalid_low;
	int n_invalid_high;
	int n_invalid_null;

	// FITS extension
	int fitsext;
	// FITS image plane
	int fitsplane;

	anbool auto_scale;

	unsigned char* img;
	int W;
	int H;
};
typedef struct plotimage_args plotimage_t;

plotimage_t* plot_image_get(plot_args_t* pargs);

int plot_image_set_wcs(plotimage_t* args, const char* filename, int ext);

void* plot_image_init(plot_args_t* args);

int plot_image_command(const char* command, const char* cmdargs,
					plot_args_t* args, void* baton);

int plot_image_plot(const char* command, cairo_t* cr,
					plot_args_t* args, void* baton);

void plot_image_free(plot_args_t* args, void* baton);

int plot_image_getsize(plotimage_t* args, int* W, int* H);

int plot_image_set_filename(plotimage_t* args, const char* fn);

int plot_image_setsize(plot_args_t* pargs, plotimage_t* args);

// 'percentile' must be in [0,1]
// results are placed in 'rgbout'
// don't rename 'rgbout' -- that name is used in plotstuff.i by SWIG
int plot_image_get_percentile(plot_args_t* pargs, plotimage_t* args,
							  double percentile,
							  unsigned char* rgbout);

void plot_image_add_to_pixels(plotimage_t* args, int rgb[3]);

unsigned char* plot_image_scale_float(plotimage_t* args, const float* fimg);

void plot_image_rgba_data(cairo_t* cairo, plotimage_t* args);

// After setting filename, actually open and read the image file.
int plot_image_read(const plot_args_t* pargs, plotimage_t* args);

void plot_image_make_color_transparent(plotimage_t* args, unsigned char r, unsigned char g, unsigned char b);

DECLARE_PLOTTER(image);

#endif