//
// "$Id$"
//
// Line style code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2016 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

#include "../../config_lib.h"
#ifdef FL_CFG_GFX_QUARTZ

#include <FL/fl_draw.H>

extern int fl_line_width_;

/**
  \file quartz_line_style.cxx
  \brief Line style drawing utility hiding different platforms.
*/

#include "Fl_Quartz_Graphics_Driver.h"

float fl_quartz_line_width_ = 1.0f;
static /*enum*/ CGLineCap fl_quartz_line_cap_ = kCGLineCapButt;
static /*enum*/ CGLineJoin fl_quartz_line_join_ = kCGLineJoinMiter;
static CGFloat *fl_quartz_line_pattern = 0;
static int fl_quartz_line_pattern_size = 0;

void fl_quartz_restore_line_style_(CGContextRef gc) {
  CGContextSetLineWidth(gc, fl_quartz_line_width_);
  CGContextSetLineCap(gc, fl_quartz_line_cap_);
  CGContextSetLineJoin(gc, fl_quartz_line_join_);
  CGContextSetLineDash(gc, 0, fl_quartz_line_pattern, fl_quartz_line_pattern_size);
}

void Fl_Quartz_Graphics_Driver::line_style(int style, int width, char* dashes) {

  // save line width in global variable for X11 clipping
  if (width == 0) fl_line_width_ = 1;
  else fl_line_width_ = width>0 ? width : -width;

  static /*enum*/ CGLineCap Cap[4] = { kCGLineCapButt, kCGLineCapButt,
                                   kCGLineCapRound, kCGLineCapSquare };
  static /*enum*/ CGLineJoin Join[4] = { kCGLineJoinMiter, kCGLineJoinMiter, 
                                    kCGLineJoinRound, kCGLineJoinBevel };
  if (width<1) width = 1;
  fl_quartz_line_width_ = (float)width; 
  fl_quartz_line_cap_ = Cap[(style>>8)&3];
  // when printing kCGLineCapSquare seems better for solid lines
  if ( Fl_Surface_Device::surface() != Fl_Display_Device::display_device()
      && style == FL_SOLID && dashes == NULL )
  {
    fl_quartz_line_cap_ = kCGLineCapSquare;
  }
  fl_quartz_line_join_ = Join[(style>>12)&3];
  char *d = dashes; 
  static CGFloat pattern[16];
  if (d && *d) {
	CGFloat *p = pattern;
    while (*d) { *p++ = (float)*d++; }
    fl_quartz_line_pattern = pattern;
    fl_quartz_line_pattern_size = d-dashes;
  } else if (style & 0xff) {
    char dash, dot, gap;
    // adjust lengths to account for cap:
    if (style & 0x200) {
      dash = char(2*width);
      dot = 1; 
      gap = char(2*width-1);
    } else {
      dash = char(3*width);
      dot = gap = char(width);
    }
	CGFloat *p = pattern;
    switch (style & 0xff) {
    case FL_DASH:       *p++ = dash; *p++ = gap; break;
    case FL_DOT:        *p++ = dot; *p++ = gap; break;
    case FL_DASHDOT:    *p++ = dash; *p++ = gap; *p++ = dot; *p++ = gap; break;
    case FL_DASHDOTDOT: *p++ = dash; *p++ = gap; *p++ = dot; *p++ = gap; *p++ = dot; *p++ = gap; break;
    }
    fl_quartz_line_pattern_size = p-pattern;
    fl_quartz_line_pattern = pattern;
  } else {
    fl_quartz_line_pattern = 0; 
		fl_quartz_line_pattern_size = 0;
  }
  fl_quartz_restore_line_style_((CGContextRef)gc());
}

#endif // FL_CFG_GFX_QUARTZ

//
// End of "$Id$".
//
