common/fltk/src/fl_line_style.cxx - android_external_tigervnc - Gitiles

 //
 // "$Id: fl_line_style.cxx 8190 2011-01-05 10:21:45Z manolo $"
 //
 // Line style code for the Fast Light Tool Kit (FLTK).
 //
 // Copyright 1998-2010 by Bill Spitzak and others.
 //
 // This library is free software; you can redistribute it and/or
 // modify it under the terms of the GNU Library General Public
 // License as published by the Free Software Foundation; either
 // version 2 of the License, or (at your option) any later version.
 //
 // This library is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 // Library General Public License for more details.
 //
 // You should have received a copy of the GNU Library General Public
 // License along with this library; if not, write to the Free Software
 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 // USA.
 //
 // Please report all bugs and problems on the following page:
 //
 //     http://www.fltk.org/str.php
 //

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

 #include <FL/Fl.H>
 #include <FL/fl_draw.H>
 #include <FL/x.H>
 #include <FL/Fl_Printer.H>
 #include "flstring.h"
 #include <stdio.h>

 // We save the current line width (absolute value) here.
 // This is currently used only for X11 clipping, see src/fl_rect.cxx.
 // FIXME: this would probably better be in class Fl::
 int fl_line_width_ = 0;

 #ifdef __APPLE_QUARTZ__
 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_() {
   CGContextSetLineWidth(fl_gc, fl_quartz_line_width_);
   CGContextSetLineCap(fl_gc, fl_quartz_line_cap_);
   CGContextSetLineJoin(fl_gc, fl_quartz_line_join_);
   CGContextSetLineDash(fl_gc, 0, fl_quartz_line_pattern, fl_quartz_line_pattern_size);
 }
 #endif

 void Fl_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;

 #if defined(USE_X11)
   int ndashes = dashes ? strlen(dashes) : 0;
   // emulate the WIN32 dash patterns on X
   char buf[7];
   if (!ndashes && (style&0xff)) {
     int w = width ? width : 1;
     char dash, dot, gap;
     // adjust lengths to account for cap:
     if (style & 0x200) {
       dash = char(2*w);
       dot = 1; // unfortunately 0 does not work
       gap = char(2*w-1);
     } else {
       dash = char(3*w);
       dot = gap = char(w);
     }
     char* p = dashes = buf;
     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;
     }
     ndashes = p-buf;
   }
   static int Cap[4] = {CapButt, CapButt, CapRound, CapProjecting};
   static int Join[4] = {JoinMiter, JoinMiter, JoinRound, JoinBevel};
   XSetLineAttributes(fl_display, fl_gc, width,
 		     ndashes ? LineOnOffDash : LineSolid,
 		     Cap[(style>>8)&3], Join[(style>>12)&3]);
   if (ndashes) XSetDashes(fl_display, fl_gc, 0, dashes, ndashes);
 #elif defined(WIN32)
   // According to Bill, the "default" cap and join should be the
   // "fastest" mode supported for the platform.  I don't know why
   // they should be different (same graphics cards, etc., right?) MRS
   static DWORD Cap[4]= {PS_ENDCAP_FLAT, PS_ENDCAP_FLAT, PS_ENDCAP_ROUND, PS_ENDCAP_SQUARE};
   static DWORD Join[4]={PS_JOIN_ROUND, PS_JOIN_MITER, PS_JOIN_ROUND, PS_JOIN_BEVEL};
   int s1 = PS_GEOMETRIC | Cap[(style>>8)&3] | Join[(style>>12)&3];
   DWORD a[16]; int n = 0;
   if (dashes && dashes[0]) {
     s1 |= PS_USERSTYLE;
     for (n = 0; n < 16 && *dashes; n++) a[n] = *dashes++;
   } else {
     s1 |= style & 0xff; // allow them to pass any low 8 bits for style
   }
   if ((style || n) && !width) width = 1; // fix cards that do nothing for 0?
   LOGBRUSH penbrush = {BS_SOLID,fl_RGB(),0}; // can this be fl_brush()?
   HPEN newpen = ExtCreatePen(s1, width, &penbrush, n, n ? a : 0);
   if (!newpen) {
     Fl::error("fl_line_style(): Could not create GDI pen object.");
     return;
   }
   HPEN oldpen = (HPEN)SelectObject(fl_gc, newpen);
   DeleteObject(oldpen);
   DeleteObject(fl_current_xmap->pen);
   fl_current_xmap->pen = newpen;
 #elif defined(__APPLE_QUARTZ__)
   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()->class_name() == Fl_Printer::class_id && 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_();
 #else
 # error unsupported platform
 #endif
 }


 //
 // End of "$Id: fl_line_style.cxx 8190 2011-01-05 10:21:45Z manolo $".
 //
	//
	// "$Id: fl_line_style.cxx 8190 2011-01-05 10:21:45Z manolo $"
	//
	// Line style code for the Fast Light Tool Kit (FLTK).
	//
	// Copyright 1998-2010 by Bill Spitzak and others.
	//
	// This library is free software; you can redistribute it and/or
	// modify it under the terms of the GNU Library General Public
	// License as published by the Free Software Foundation; either
	// version 2 of the License, or (at your option) any later version.
	//
	// This library is distributed in the hope that it will be useful,
	// but WITHOUT ANY WARRANTY; without even the implied warranty of
	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	// Library General Public License for more details.
	//
	// You should have received a copy of the GNU Library General Public
	// License along with this library; if not, write to the Free Software
	// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
	// USA.
	//
	// Please report all bugs and problems on the following page:
	//
	// http://www.fltk.org/str.php
	//

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

	#include <FL/Fl.H>
	#include <FL/fl_draw.H>
	#include <FL/x.H>
	#include <FL/Fl_Printer.H>
	#include "flstring.h"
	#include <stdio.h>

	// We save the current line width (absolute value) here.
	// This is currently used only for X11 clipping, see src/fl_rect.cxx.
	// FIXME: this would probably better be in class Fl::
	int fl_line_width_ = 0;

	#ifdef __APPLE_QUARTZ__
	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_() {
	CGContextSetLineWidth(fl_gc, fl_quartz_line_width_);
	CGContextSetLineCap(fl_gc, fl_quartz_line_cap_);
	CGContextSetLineJoin(fl_gc, fl_quartz_line_join_);
	CGContextSetLineDash(fl_gc, 0, fl_quartz_line_pattern, fl_quartz_line_pattern_size);
	}
	#endif

	void Fl_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;

	#if defined(USE_X11)
	int ndashes = dashes ? strlen(dashes) : 0;
	// emulate the WIN32 dash patterns on X
	char buf[7];
	if (!ndashes && (style&0xff)) {
	int w = width ? width : 1;
	char dash, dot, gap;
	// adjust lengths to account for cap:
	if (style & 0x200) {
	dash = char(2*w);
	dot = 1; // unfortunately 0 does not work
	gap = char(2*w-1);
	} else {
	dash = char(3*w);
	dot = gap = char(w);
	}
	char* p = dashes = buf;
	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;
	}
	ndashes = p-buf;
	}
	static int Cap[4] = {CapButt, CapButt, CapRound, CapProjecting};
	static int Join[4] = {JoinMiter, JoinMiter, JoinRound, JoinBevel};
	XSetLineAttributes(fl_display, fl_gc, width,
	ndashes ? LineOnOffDash : LineSolid,
	Cap[(style>>8)&3], Join[(style>>12)&3]);
	if (ndashes) XSetDashes(fl_display, fl_gc, 0, dashes, ndashes);
	#elif defined(WIN32)
	// According to Bill, the "default" cap and join should be the
	// "fastest" mode supported for the platform. I don't know why
	// they should be different (same graphics cards, etc., right?) MRS
	static DWORD Cap[4]= {PS_ENDCAP_FLAT, PS_ENDCAP_FLAT, PS_ENDCAP_ROUND, PS_ENDCAP_SQUARE};
	static DWORD Join[4]={PS_JOIN_ROUND, PS_JOIN_MITER, PS_JOIN_ROUND, PS_JOIN_BEVEL};
	int s1 = PS_GEOMETRIC \| Cap[(style>>8)&3] \| Join[(style>>12)&3];
	DWORD a[16]; int n = 0;
	if (dashes && dashes[0]) {
	s1 \|= PS_USERSTYLE;
	for (n = 0; n < 16 && dashes; n++) a[n] = dashes++;
	} else {
	s1 \|= style & 0xff; // allow them to pass any low 8 bits for style
	}
	if ((style \|\| n) && !width) width = 1; // fix cards that do nothing for 0?
	LOGBRUSH penbrush = {BS_SOLID,fl_RGB(),0}; // can this be fl_brush()?
	HPEN newpen = ExtCreatePen(s1, width, &penbrush, n, n ? a : 0);
	if (!newpen) {
	Fl::error("fl_line_style(): Could not create GDI pen object.");
	return;
	}
	HPEN oldpen = (HPEN)SelectObject(fl_gc, newpen);
	DeleteObject(oldpen);
	DeleteObject(fl_current_xmap->pen);
	fl_current_xmap->pen = newpen;
	#elif defined(__APPLE_QUARTZ__)
	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()->class_name() == Fl_Printer::class_id && 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_();
	#else
	# error unsupported platform
	#endif
	}


	//
	// End of "$Id: fl_line_style.cxx 8190 2011-01-05 10:21:45Z manolo $".
	//