add37faa25
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@4052 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
//
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// "$Id$"
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//
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// Arc (integer) drawing functions for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2005 by Bill Spitzak and others.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems to "fltk-bugs@fltk.org".
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//
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// "integer" circle drawing functions. These draw the limited
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// circle types provided by X and NT graphics. The advantage of
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// these is that small ones draw quite nicely (probably due to stored
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// hand-drawn bitmaps of small circles!) and may be implemented by
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// hardware and thus are fast.
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// Probably should add fl_chord.
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// 3/10/98: created
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#include <FL/fl_draw.H>
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#include <FL/x.H>
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#ifdef WIN32
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#include <FL/math.h>
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#endif
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#ifdef __APPLE__
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#include <config.h>
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#endif
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void fl_arc(int x,int y,int w,int h,double a1,double a2) {
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if (w <= 0 || h <= 0) return;
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#ifdef WIN32
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int xa = x+w/2+int(w*cos(a1/180.0*M_PI));
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int ya = y+h/2-int(h*sin(a1/180.0*M_PI));
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int xb = x+w/2+int(w*cos(a2/180.0*M_PI));
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int yb = y+h/2-int(h*sin(a2/180.0*M_PI));
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Arc(fl_gc, x, y, x+w, y+h, xa, ya, xb, yb);
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#elif defined(__APPLE_QD__)
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Rect r; r.left=x; r.right=x+w; r.top=y; r.bottom=y+h;
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a1 = a2-a1; a2 = 450-a2;
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FrameArc(&r, (short int)a2, (short int)a1);
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#elif defined(__APPLE_QUARTZ__)
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a1 = (-a1)/180.0f*M_PI; a2 = (-a2)/180.0f*M_PI;
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float cx = x + 0.5f*w - 0.5f, cy = y + 0.5f*h - 0.5f;
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if (w!=h) {
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CGContextSaveGState(fl_gc);
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CGContextTranslateCTM(fl_gc, cx, cy);
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CGContextScaleCTM(fl_gc, w-1.0f, h-1.0f);
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CGContextAddArc(fl_gc, 0, 0, 0.5, a1, a2, 1);
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CGContextRestoreGState(fl_gc);
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} else {
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float r = (w+h)*0.25f-0.5f;
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CGContextAddArc(fl_gc, cx, cy, r, a1, a2, 1);
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}
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CGContextStrokePath(fl_gc);
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#else
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XDrawArc(fl_display, fl_window, fl_gc, x,y,w-1,h-1, int(a1*64),int((a2-a1)*64));
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#endif
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}
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void fl_pie(int x,int y,int w,int h,double a1,double a2) {
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if (w <= 0 || h <= 0) return;
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#ifdef WIN32
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if (a1 == a2) return;
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int xa = x+w/2+int(w*cos(a1/180.0*M_PI));
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int ya = y+h/2-int(h*sin(a1/180.0*M_PI));
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int xb = x+w/2+int(w*cos(a2/180.0*M_PI));
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int yb = y+h/2-int(h*sin(a2/180.0*M_PI));
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SelectObject(fl_gc, fl_brush());
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Pie(fl_gc, x, y, x+w, y+h, xa, ya, xb, yb);
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#elif defined(__APPLE_QD__)
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Rect r; r.left=x; r.right=x+w; r.top=y; r.bottom=y+h;
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a1 = a2-a1; a2 = 450-a2;
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PaintArc(&r, (short int)a2, (short int)a1);
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#elif defined(__APPLE_QUARTZ__)
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a1 = (-a1)/180.0f*M_PI; a2 = (-a2)/180.0f*M_PI;
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float cx = x + 0.5f*w - 0.5f, cy = y + 0.5f*h - 0.5f;
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if (w!=h) {
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CGContextSaveGState(fl_gc);
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CGContextTranslateCTM(fl_gc, cx, cy);
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CGContextScaleCTM(fl_gc, w, h);
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CGContextAddArc(fl_gc, 0, 0, 0.5, a1, a2, 1);
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CGContextAddLineToPoint(fl_gc, 0, 0);
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CGContextClosePath(fl_gc);
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CGContextRestoreGState(fl_gc);
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} else {
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float r = (w+h)*0.25f;
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CGContextAddArc(fl_gc, cx, cy, r, a1, a2, 1);
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CGContextAddLineToPoint(fl_gc, cx, cy);
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CGContextClosePath(fl_gc);
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}
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CGContextFillPath(fl_gc);
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#else
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XFillArc(fl_display, fl_window, fl_gc, x,y,w,h, int(a1*64),int((a2-a1)*64));
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#endif
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}
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//
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// End of "$Id$".
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//
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