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//
// CUPS raster file display widget header file.
//
// Copyright 2002-2018 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
#ifndef RasterDisplay_h
# define RasterDisplay_h
//
// Include necessary headers...
//
# include "raster.h"
# include <FL/Fl.H>
# include <FL/Fl_Group.H>
# include <FL/Fl_Scrollbar.H>
# include <zlib.h>
// Maximum pages
# define RASTER_MAX_PAGES 1000
//
// Display control modes...
//
enum
{
RASTER_MODE_PAN,
RASTER_MODE_ZOOM_IN,
RASTER_MODE_ZOOM_OUT,
RASTER_MODE_CLICK
};
//
// RasterDisplay widget...
//
class RasterDisplay : public Fl_Group
{
cups_raster_t *ras_; // Raster stream
const char *filename_; // Filename
gzFile fp_; // File pointer
int page_, // Current page number
num_pages_; // Number of pages
z_off_t pages_[RASTER_MAX_PAGES];
// Page offsets
cups_page_header2_t header_; // Page header for current page
int bpc_, // Bytes per color
bpp_; // Bytes per pixel
uchar *pixels_; // Pixel buffer
long alloc_pixels_; // Number of bytes allocated
uchar *colors_; // Color data buffer
long alloc_colors_; // Numebr of colors allocated
float factor_; // Zoom factor
int xsize_; // Bresenheim variables
int xstep_; // ...
int xmod_; // ...
int ysize_; // ...
Fl_Scrollbar xscrollbar_; // Horizontal scrollbar
Fl_Scrollbar yscrollbar_; // Vertical scrollbar
int mode_; // Viewing mode
int start_ex_, // Start position (mouse coords)
start_ey_;
int start_x_, // Start position (image coords)
start_y_;
int mouse_x_, // Current position (image coords)
mouse_y_;
int last_x_, // Previous position (image coords)
last_y_;
uchar device_colors_[15][3];
// CMY device colors
static void image_cb(void *p, int X, int Y, int W, uchar *D);
void load_colors();
void save_colors();
static void scrollbar_cb(Fl_Widget *w, void *d);
void update_mouse_xy();
void update_scrollbars();
protected:
void draw();
public:
RasterDisplay(int X, int Y, int W, int H, const char *L = 0);
~RasterDisplay();
int bytes_per_color() const { return bpc_; }
int bytes_per_pixel() const { return bpp_; }
int close_file();
void device_color(int n, Fl_Color c) { uchar r,g,b; Fl::get_color(c, r, g, b); device_colors_[n][0] = 255-r; device_colors_[n][1] = 255-g; device_colors_[n][2] = 255-b; save_colors();}
Fl_Color device_color(int n) { return (fl_rgb_color(255-device_colors_[n][0], 255-device_colors_[n][1], 255-device_colors_[n][2])); }
uchar *get_color(int X, int Y);
uchar *get_pixel(int X, int Y);
int handle(int event);
cups_page_header2_t *header() { return &header_; }
int is_subtractive();
int load_page();
void mode(int m) { mode_ = m; }
int mode() const { return mode_; }
int mouse_x() const { return mouse_x_; }
int mouse_y() const { return mouse_y_; }
int num_pages() const { return num_pages_; }
int page(void);
void page(int number);
void position(int X, int Y);
void resize(int X, int Y, int W, int H);
void scale(float factor);
float scale() const { return factor_; }
int start_x() const { return start_x_; }
int start_y() const { return start_y_; }
int open_file(const char *filename);
int xposition() { return xscrollbar_.value(); }
int yposition() { return yscrollbar_.value(); }
};
#endif // !RasterDisplay_h
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