435e7f5e23
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@9239 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
278 lines
7.5 KiB
C++
278 lines
7.5 KiB
C++
//
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// "$Id$"
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//
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// Portable drawing routines for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2011 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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/**
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\file fl_vertex.cxx
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\brief Portable drawing code for drawing arbitrary shapes with
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simple 2D transformations.
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*/
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// Portable drawing code for drawing arbitrary shapes with
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// simple 2D transformations. See also fl_arc.cxx
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// matt: the Quartz implementation purposely doesn't use the Quartz matrix
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// operations for reasons of compatibility and maintainability
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#include <config.h>
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#include <FL/fl_draw.H>
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#include <FL/x.H>
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#include <FL/Fl.H>
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#include <FL/math.h>
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#include <stdlib.h>
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void Fl_Graphics_Driver::push_matrix() {
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if (sptr==matrix_stack_size)
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Fl::error("fl_push_matrix(): matrix stack overflow.");
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else
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stack[sptr++] = m;
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}
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void Fl_Graphics_Driver::pop_matrix() {
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if (sptr==0)
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Fl::error("fl_pop_matrix(): matrix stack underflow.");
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else
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m = stack[--sptr];
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}
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void Fl_Graphics_Driver::mult_matrix(double a, double b, double c, double d, double x, double y) {
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matrix o;
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o.a = a*m.a + b*m.c;
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o.b = a*m.b + b*m.d;
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o.c = c*m.a + d*m.c;
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o.d = c*m.b + d*m.d;
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o.x = x*m.a + y*m.c + m.x;
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o.y = x*m.b + y*m.d + m.y;
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m = o;
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}
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void Fl_Graphics_Driver::rotate(double d) {
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if (d) {
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double s, c;
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if (d == 0) {s = 0; c = 1;}
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else if (d == 90) {s = 1; c = 0;}
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else if (d == 180) {s = 0; c = -1;}
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else if (d == 270 || d == -90) {s = -1; c = 0;}
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else {s = sin(d*M_PI/180); c = cos(d*M_PI/180);}
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mult_matrix(c,-s,s,c,0,0);
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}
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}
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void Fl_Graphics_Driver::begin_points() {n = 0; what = POINT_;}
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void Fl_Graphics_Driver::begin_line() {n = 0; what = LINE;}
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void Fl_Graphics_Driver::begin_loop() {n = 0; what = LOOP;}
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void Fl_Graphics_Driver::begin_polygon() {n = 0; what = POLYGON;}
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double Fl_Graphics_Driver::transform_x(double x, double y) {return x*m.a + y*m.c + m.x;}
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double Fl_Graphics_Driver::transform_y(double x, double y) {return x*m.b + y*m.d + m.y;}
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double Fl_Graphics_Driver::transform_dx(double x, double y) {return x*m.a + y*m.c;}
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double Fl_Graphics_Driver::transform_dy(double x, double y) {return x*m.b + y*m.d;}
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void Fl_Graphics_Driver::transformed_vertex0(COORD_T x, COORD_T y) {
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if (!n || x != p[n-1].x || y != p[n-1].y) {
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if (n >= p_size) {
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p_size = p ? 2*p_size : 16;
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p = (XPOINT*)realloc((void*)p, p_size*sizeof(*p));
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}
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p[n].x = x;
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p[n].y = y;
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n++;
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}
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}
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void Fl_Graphics_Driver::transformed_vertex(double xf, double yf) {
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#ifdef __APPLE_QUARTZ__
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transformed_vertex0(COORD_T(xf), COORD_T(yf));
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#else
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transformed_vertex0(COORD_T(rint(xf)), COORD_T(rint(yf)));
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#endif
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}
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void Fl_Graphics_Driver::vertex(double x,double y) {
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transformed_vertex0(COORD_T(x*m.a + y*m.c + m.x), COORD_T(x*m.b + y*m.d + m.y));
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}
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void Fl_Graphics_Driver::end_points() {
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#if defined(USE_X11)
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if (n>1) XDrawPoints(fl_display, fl_window, fl_gc, p, n, 0);
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#elif defined(WIN32)
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for (int i=0; i<n; i++) SetPixel(fl_gc, p[i].x, p[i].y, fl_RGB());
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#elif defined(__APPLE_QUARTZ__)
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if (fl_quartz_line_width_ > 1.5f) CGContextSetShouldAntialias(fl_gc, true);
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for (int i=0; i<n; i++) {
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CGContextMoveToPoint(fl_gc, p[i].x, p[i].y);
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CGContextAddLineToPoint(fl_gc, p[i].x, p[i].y);
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CGContextStrokePath(fl_gc);
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}
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if (fl_quartz_line_width_ > 1.5f) CGContextSetShouldAntialias(fl_gc, false);
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#else
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# error unsupported platform
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#endif
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}
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void Fl_Graphics_Driver::end_line() {
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if (n < 2) {
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end_points();
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return;
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}
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#if defined(USE_X11)
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if (n>1) XDrawLines(fl_display, fl_window, fl_gc, p, n, 0);
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#elif defined(WIN32)
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if (n>1) Polyline(fl_gc, p, n);
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#elif defined(__APPLE_QUARTZ__)
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if (n<=1) return;
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CGContextSetShouldAntialias(fl_gc, true);
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CGContextMoveToPoint(fl_gc, p[0].x, p[0].y);
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for (int i=1; i<n; i++)
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CGContextAddLineToPoint(fl_gc, p[i].x, p[i].y);
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CGContextStrokePath(fl_gc);
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CGContextSetShouldAntialias(fl_gc, false);
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#else
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# error unsupported platform
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#endif
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}
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void Fl_Graphics_Driver::fixloop() { // remove equal points from closed path
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while (n>2 && p[n-1].x == p[0].x && p[n-1].y == p[0].y) n--;
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}
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void Fl_Graphics_Driver::end_loop() {
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fixloop();
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if (n>2) transformed_vertex((COORD_T)p[0].x, (COORD_T)p[0].y);
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end_line();
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}
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void Fl_Graphics_Driver::end_polygon() {
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fixloop();
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if (n < 3) {
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end_line();
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return;
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}
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#if defined(USE_X11)
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if (n>2) XFillPolygon(fl_display, fl_window, fl_gc, p, n, Convex, 0);
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#elif defined(WIN32)
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if (n>2) {
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SelectObject(fl_gc, fl_brush());
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Polygon(fl_gc, p, n);
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}
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#elif defined(__APPLE_QUARTZ__)
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if (n<=1) return;
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CGContextSetShouldAntialias(fl_gc, true);
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CGContextMoveToPoint(fl_gc, p[0].x, p[0].y);
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for (int i=1; i<n; i++)
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CGContextAddLineToPoint(fl_gc, p[i].x, p[i].y);
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CGContextClosePath(fl_gc);
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CGContextFillPath(fl_gc);
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CGContextSetShouldAntialias(fl_gc, false);
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#else
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# error unsupported platform
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#endif
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}
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void Fl_Graphics_Driver::begin_complex_polygon() {
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begin_polygon();
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gap_ = 0;
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#if defined(WIN32)
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numcount = 0;
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#endif
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}
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void Fl_Graphics_Driver::gap() {
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while (n>gap_+2 && p[n-1].x == p[gap_].x && p[n-1].y == p[gap_].y) n--;
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if (n > gap_+2) {
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transformed_vertex((COORD_T)p[gap_].x, (COORD_T)p[gap_].y);
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#if defined(WIN32)
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counts[numcount++] = n-gap_;
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#endif
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gap_ = n;
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} else {
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n = gap_;
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}
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}
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void Fl_Graphics_Driver::end_complex_polygon() {
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gap();
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if (n < 3) {
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end_line();
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return;
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}
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#if defined(USE_X11)
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if (n>2) XFillPolygon(fl_display, fl_window, fl_gc, p, n, 0, 0);
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#elif defined(WIN32)
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if (n>2) {
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SelectObject(fl_gc, fl_brush());
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PolyPolygon(fl_gc, p, counts, numcount);
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}
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#elif defined(__APPLE_QUARTZ__)
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if (n<=1) return;
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CGContextSetShouldAntialias(fl_gc, true);
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CGContextMoveToPoint(fl_gc, p[0].x, p[0].y);
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for (int i=1; i<n; i++)
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CGContextAddLineToPoint(fl_gc, p[i].x, p[i].y);
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CGContextClosePath(fl_gc);
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CGContextFillPath(fl_gc);
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CGContextSetShouldAntialias(fl_gc, false);
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#else
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# error unsupported platform
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#endif
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}
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// shortcut the closed circles so they use XDrawArc:
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// warning: these do not draw rotated ellipses correctly!
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// See fl_arc.c for portable version.
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void Fl_Graphics_Driver::circle(double x, double y,double r) {
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double xt = transform_x(x,y);
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double yt = transform_y(x,y);
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double rx = r * (m.c ? sqrt(m.a*m.a+m.c*m.c) : fabs(m.a));
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double ry = r * (m.b ? sqrt(m.b*m.b+m.d*m.d) : fabs(m.d));
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int llx = (int)rint(xt-rx);
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int w = (int)rint(xt+rx)-llx;
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int lly = (int)rint(yt-ry);
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int h = (int)rint(yt+ry)-lly;
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#if defined(USE_X11)
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(what == POLYGON ? XFillArc : XDrawArc)
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(fl_display, fl_window, fl_gc, llx, lly, w, h, 0, 360*64);
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#elif defined(WIN32)
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if (what==POLYGON) {
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SelectObject(fl_gc, fl_brush());
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Pie(fl_gc, llx, lly, llx+w, lly+h, 0,0, 0,0);
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} else
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Arc(fl_gc, llx, lly, llx+w, lly+h, 0,0, 0,0);
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#elif defined(__APPLE_QUARTZ__)
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// Quartz warning: circle won't scale to current matrix!
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// Last argument must be 0 (counter-clockwise) or it draws nothing under __LP64__ !!!!
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CGContextSetShouldAntialias(fl_gc, true);
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CGContextAddArc(fl_gc, xt, yt, (w+h)*0.25f, 0, 2.0f*M_PI, 0);
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(what == POLYGON ? CGContextFillPath : CGContextStrokePath)(fl_gc);
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CGContextSetShouldAntialias(fl_gc, false);
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#else
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# error unsupported platform
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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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