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Editing: gnuplot_common.js
// Shared routines for gnuplot's HTML5 canvas terminal driver. var gnuplot = { }; gnuplot.common_version = "3 May 2012"; gnuplot.L = function (x,y) { if (gnuplot.zoomed) { var zoom = gnuplot.zoomXY(x/10.0,y/10.0); ctx.lineTo(zoom.x,zoom.y); } else ctx.lineTo(x/10.0,y/10.0); } gnuplot.M = function (x,y) { if (gnuplot.zoomed) { var zoom = gnuplot.zoomXY(x/10.0,y/10.0); ctx.moveTo(zoom.x,zoom.y); } else ctx.moveTo(x/10.0,y/10.0); } gnuplot.R = function (x,y,w,h) { if (gnuplot.zoomed) { var dx, dy, dw, dh; var zoom = gnuplot.zoomXY(x/10.0,y/10.0); if (zoom.x >= gnuplot.plot_xmax) return; if (zoom.y >= gnuplot.plot_ybot) return; dx = zoom.x; dy = zoom.y; zoom = gnuplot.zoomXY((x+w)/10.,(y+h)/10.); if (zoom.xraw <= gnuplot.plot_xmin) return; if (zoom.yraw <= gnuplot.plot_ytop) return; dw = zoom.x - dx; dh = zoom.y -dy; ctx.fillRect(dx, dy, dw, dh); } else ctx.fillRect(x/10.0, y/10.0, w/10.0, h/10.0); } gnuplot.T = function (x,y,fontsize,justify,string) { var xx = x/10.0; var yy = y/10.0; if (gnuplot.zoomed) { var zoom = gnuplot.zoomXY(xx,yy); if (zoom.clip) return; xx = zoom.x; yy = zoom.y; if (gnuplot.plot_xmin < xx && xx < gnuplot.plot_xmax && gnuplot.plot_ybot > yy && yy > gnuplot.plot_ytop) if ((typeof(gnuplot.zoom_text) != "undefined") && (gnuplot.zoom_text == true)) fontsize = Math.sqrt(gnuplot.zoomW(fontsize)*gnuplot.zoomH(fontsize)); } if (justify=="") ctx.drawText("sans", fontsize, xx, yy, string); else if (justify=="Right") ctx.drawTextRight("sans", fontsize, xx, yy, string); else if (justify=="Center") ctx.drawTextCenter("sans", fontsize, xx, yy, string); } gnuplot.TR = function (x,y,angle,fontsize,justify,string) { var xx = x/10.0; var yy = y/10.0; if (gnuplot.zoomed) { var zoom = gnuplot.zoomXY(xx,yy); if (zoom.clip) return; xx = zoom.x; yy = zoom.y; if (gnuplot.plot_xmin < xx && xx < gnuplot.plot_xmax && gnuplot.plot_ybot > yy && yy > gnuplot.plot_ytop) if ((typeof(gnuplot.zoom_text) != "undefined") && (gnuplot.zoom_text == true)) fontsize = Math.sqrt(gnuplot.zoomW(fontsize)*gnuplot.zoomH(fontsize)); } ctx.save(); ctx.translate(xx,yy); ctx.rotate(angle * Math.PI / 180); if (justify=="") ctx.drawText("sans", fontsize, 0, 0, string); else if (justify=="Right") ctx.drawTextRight("sans", fontsize, 0, 0, string); else if (justify=="Center") ctx.drawTextCenter("sans", fontsize, 0, 0, string); ctx.restore(); } gnuplot.bp = function (x,y) // begin polygon { ctx.beginPath(); gnuplot.M(x,y); } gnuplot.cfp = function () // close and fill polygon { ctx.closePath(); ctx.fill(); } gnuplot.cfsp = function () // close and fill polygon with stroke color { ctx.closePath(); ctx.fillStyle = ctx.strokeStyle; ctx.stroke(); ctx.fill(); } gnuplot.Dot = function (x,y) { var xx = x; var yy = y; if (gnuplot.zoomed) {zoom = gnuplot.zoomXY(xx,yy); xx = zoom.x; yy = zoom.y; if (zoom.clip) return;} ctx.strokeRect(xx,yy,0.5,0.5); } gnuplot.Pt = function (N,x,y,w) { var xx = x; var yy = y; if (gnuplot.zoomed) {var zoom = gnuplot.zoomXY(xx,yy); xx = zoom.x; yy = zoom.y; if (zoom.clip) return;} if (w==0) return; switch (N) { case 0: ctx.beginPath(); ctx.moveTo(xx-w,yy); ctx.lineTo(xx+w,yy); ctx.moveTo(xx,yy-w); ctx.lineTo(xx,yy+w); ctx.stroke(); break; case 1: var ww = w * 3/4; ctx.beginPath(); ctx.moveTo(xx-ww,yy-ww); ctx.lineTo(xx+ww,yy+ww); ctx.moveTo(xx+ww,yy-ww); ctx.lineTo(xx-ww,yy+ww); ctx.stroke(); break; case 2: gnuplot.Pt(0,x,y,w); gnuplot.Pt(1,x,y,w); break; case 3: ctx.strokeRect(xx-w/2,yy-w/2,w,w); break; case 4: ctx.save(); ctx.strokeRect(xx-w/2,yy-w/2,w,w); ctx.restore(); ctx.fillRect(xx-w/2,yy-w/2,w,w); break; case 5: ctx.beginPath(); ctx.arc(xx,yy,w/2,0,Math.PI*2,true); ctx.stroke(); break; default: case 6: ctx.beginPath(); ctx.arc(xx,yy,w/2,0,Math.PI*2,true); ctx.fill(); break; case 7: ctx.beginPath(); ctx.moveTo(xx,yy-w); ctx.lineTo(xx-w,yy+w/2); ctx.lineTo(xx+w,yy+w/2); ctx.closePath(); ctx.stroke(); break; case 8: ctx.beginPath(); ctx.moveTo(xx,yy-w); ctx.lineTo(xx-w,yy+w/2); ctx.lineTo(xx+w,yy+w/2); ctx.closePath(); ctx.fill(); break; } } // Zoomable image gnuplot.ZI = function (image, m, n, x1, y1, x2, y2) { if (gnuplot.zoomed) { var sx, sy, sw, sh, dx, dy, dw, dh; var zoom = gnuplot.zoomXY(x1/10.0,y1/10.0); if (zoom.x >= gnuplot.plot_xmax) return; if (zoom.y >= gnuplot.plot_ybot) return; x1raw = zoom.xraw; y1raw = zoom.yraw; dx = zoom.x; dy = zoom.y; zoom = gnuplot.zoomXY((x2)/10.,(y2)/10.); if (zoom.xraw <= gnuplot.plot_xmin) return; if (zoom.yraw <= gnuplot.plot_ytop) return; var x2raw = zoom.xraw; var y2raw = zoom.yraw; dw = zoom.x - dx; dh = zoom.y - dy; // FIXME: This is sometimes flaky. Needs integer truncation? sx = 0; sy = 0; sw = m; sh = n; if (x1raw < dx) sx = m * (dx - x1raw) / (x2raw - x1raw); if (y1raw < dy) sy = n * (dy - y1raw) / (y2raw - y1raw); if (x2raw > zoom.x) sw = m * (1. - ((x2raw - zoom.x) / (x2raw - x1raw))); if (y2raw > zoom.y) sh = n * (1. - ((y2raw - zoom.y) / (y2raw - y1raw))); sw = sw - sx; sh = sh - sy; ctx.drawImage(image, sx, sy, sw, sh, dx, dy, dw, dh); } else ctx.drawImage(image, x1/10.0, y1/10.0, (x2-x1)/10.0, (y2-y1)/10.0); } // These methods are place holders that are loaded by gnuplot_dashedlines.js gnuplot.dashtype = function (dt) {} ; gnuplot.dashstart = function (x,y) {gnuplot.M(x,y);} ; gnuplot.dashstep = function (x,y) {gnuplot.L(x,y);} ; gnuplot.pattern = [];
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