mirror of
https://github.com/trebonian/visual6502.git
synced 2024-12-21 21:29:16 +00:00
201 lines
5.6 KiB
JavaScript
201 lines
5.6 KiB
JavaScript
/*
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Copyright (c) 2010 Brian Silverman, Barry Silverman
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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var centerx=300, centery=300;
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var zoom=1;
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var dragMouseX, dragMouseY, moved;
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var statbox;
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var animateChipLayout = true;
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var userCode=[];
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var userResetLow;
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var userResetHigh;
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// Some constants for the graphics presentation
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// the canvas is embedded in an 800x600 clipping div
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// which gives rise to some of the 300 and 400 values in the code
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// there are also some 600 values
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// the 6502D chip coords are in the box (216,179) to (8983,9807)
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// we have 4 canvases all the same size, now 2000 pixels square
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// chip background - the layout
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// overlay - a red/white transparency to show logic high or low
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// hilite - to show the selected polygon
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// hitbuffer - abusing color values to return which polygon is under a point
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// we no longer use a scaling transform - we now scale the chip data at
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// the point of drawing line segments
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// if the canvas is any smaller than chip coordinates there will be
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// rounding artifacts, and at high zoom there will be anti-aliasing on edges.
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var grMaxZoom=12;
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var grChipSize=10000;
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var grCanvasSize=2000;
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var grLineWidth=1;
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// Index of layerNames corresponds to index into drawLayers
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var layernames = ['metal', 'switched diffusion', 'inputdiode', 'grounded diffusion', 'powered diffusion', 'polysilicon'];
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var colors = ['rgba(128,128,192,0.4)','#FFFF00','#FF00FF','#4DFF4D',
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'#FF4D4D','#801AC0','rgba(128,0,255,0.75)'];
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var drawlayers = [true, true, true, true, true, true];
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/////////////////////////
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//
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// Drawing Setup
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//
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/////////////////////////
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// try to present a meaningful page before starting expensive work
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function setup(){
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statbox = document.getElementById('status');
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setStatus('loading 6502...');
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setTimeout(setup_part2, 0);
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}
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function setup_part2(){
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frame = document.getElementById('frame');
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statbox = document.getElementById('status');
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setupNodes();
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setupTransistors();
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setupLayerVisibility();
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setupBackground();
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setupOverlay();
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setupHilite();
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setupHitBuffer();
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recenter();
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refresh();
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setupTable();
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window.onkeypress = function(e){handleKey(e);}
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hilite.onmousedown = function(e){mouseDown(e);}
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setStatus('resetting 6502...');
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setTimeout(setup_part3, 0);
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}
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function setup_part3(){
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loadProgram();
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writeTriggers={}; // kiosk mode does not handle I/O
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initChip();
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document.getElementById('stop').style.visibility = 'hidden';
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go();
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}
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/////////////////////////
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//
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// User Interface
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//
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/////////////////////////
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function handleKey(e){
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var c = e.charCode || e.keyCode;
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c = String.fromCharCode(c);
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if('zx<>?np'.indexOf(c)==-1) return;
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if((c=='x' || c=='<') && zoom>1) setZoom(zoom/1.2);
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else if((c=='z' || c=='>') && zoom<grMaxZoom) setZoom(zoom*1.2);
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else if(c=='?') setZoom(1);
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else if(c=='n') stepForward();
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else if(c=='p') stepBack();
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}
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function mouseDown(e){
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e.preventDefault();
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moved=false;
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dragMouseX = e.clientX;
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dragMouseY = e.clientY;
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window.onmousemove = function(e){mouseMove(e)};
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window.onmouseup = function(e){mouseUp(e)};
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}
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function mouseMove(e){
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moved = true;
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if(zoom==1) return;
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var dx = e.clientX-dragMouseX;
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var dy = e.clientY-dragMouseY;
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dragMouseX = e.clientX;
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dragMouseY = e.clientY;
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centerx-=dx/zoom;
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centerx = Math.max(centerx, 400/zoom);
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centerx = Math.min(centerx, 600-400/zoom);
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centery-=dy/zoom;
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centery = Math.max(centery, 300/zoom);
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centery = Math.min(centery, 600-300/zoom);
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recenter();
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}
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function mouseUp(e){
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if(!moved) handleClick(e);
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window.onmousemove = undefined;
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window.onmouseup = undefined;
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}
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function setZoom(n){
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zoom = n;
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setChipStyle({
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width: 600*n+'px',
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height: 600*n+'px'
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});
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recenter();
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}
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function recenter(){
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var top = -centery*zoom+300;
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top = Math.min(top, 0);
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top = Math.max(top, -600*(zoom-1));
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var left = -centerx*zoom+400;
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left = Math.min(left, 0);
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left = Math.max(left, (zoom==1)?100:-600*zoom+800);
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setChipStyle({
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top: top+'px',
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left: left+'px',
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});
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}
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function handleClick(e){
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var x = localx(hilite, e.clientX)/zoom;
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var y = localy(hilite, e.clientY)/zoom;
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var w = findNodeNumber(x,y);
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if(e.shiftKey) {
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getNodeGroup(w);
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hiliteNode(group);
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}
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else {var a=new Array(); a.push(w); hiliteNode(a);}
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var cx = Math.round(x*grChipSize/600);
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var cy = Math.round(y*grChipSize/600);
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if(w==-1) setStatus('x:',cx,'<br>','y:',cy);
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else {
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var s1='x: ' + cx + ' y: ' + cy;
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var s2='node: ' + w + ' ' + nodeName(w);
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setStatus(s1, s2);
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}
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}
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/////////////////////////
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//
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// Etc.
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//
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/////////////////////////
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function setChipStyle(props){
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for(var i in props){
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chipbg.style[i] = props[i];
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overlay.style[i] = props[i];
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hilite.style[i] = props[i];
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hitbuffer.style[i] = props[i];
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}
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}
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