Add jquery and flot to catapult/third_party.

third_party/flot/jquery.flot.image.js

+/* Flot plugin for plotting images.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+The data syntax is [ [ image, x1, y1, x2, y2 ], ... ] where (x1, y1) and
+(x2, y2) are where you intend the two opposite corners of the image to end up
+in the plot. Image must be a fully loaded Javascript image (you can make one
+with new Image()). If the image is not complete, it's skipped when plotting.
+
+There are two helpers included for retrieving images. The easiest work the way
+that you put in URLs instead of images in the data, like this:
+
+        [ "myimage.png", 0, 0, 10, 10 ]
+
+Then call $.plot.image.loadData( data, options, callback ) where data and
+options are the same as you pass in to $.plot. This loads the images, replaces
+the URLs in the data with the corresponding images and calls "callback" when
+all images are loaded (or failed loading). In the callback, you can then call
+$.plot with the data set. See the included example.
+
+A more low-level helper, $.plot.image.load(urls, callback) is also included.
+Given a list of URLs, it calls callback with an object mapping from URL to
+Image object when all images are loaded or have failed loading.
+
+The plugin supports these options:
+
+        series: {
+                images: {
+                        show: boolean
+                        anchor: "corner" or "center"
+                        alpha: [ 0, 1 ]
+                }
+        }
+
+They can be specified for a specific series:
+
+        $.plot( $("#placeholder"), [{
+                data: [ ... ],
+                images: { ... }
+        ])
+
+Note that because the data format is different from usual data points, you
+can't use images with anything else in a specific data series.
+
+Setting "anchor" to "center" causes the pixels in the image to be anchored at
+the corner pixel centers inside of at the pixel corners, effectively letting
+half a pixel stick out to each side in the plot.
+
+A possible future direction could be support for tiling for large images (like
+Google Maps).
+
+*/
+
+(function ($) {
+    var options = {
+        series: {
+            images: {
+                show: false,
+                alpha: 1,
+                anchor: "corner" // or "center"
+            }
+        }
+    };
+
+    $.plot.image = {};
+
+    $.plot.image.loadDataImages = function (series, options, callback) {
+        var urls = [], points = [];
+
+        var defaultShow = options.series.images.show;
+        
+        $.each(series, function (i, s) {
+            if (!(defaultShow || s.images.show))
+                return;
+            
+            if (s.data)
+                s = s.data;
+
+            $.each(s, function (i, p) {
+                if (typeof p[0] == "string") {
+                    urls.push(p[0]);
+                    points.push(p);
+                }
+            });
+        });
+
+        $.plot.image.load(urls, function (loadedImages) {
+            $.each(points, function (i, p) {
+                var url = p[0];
+                if (loadedImages[url])
+                    p[0] = loadedImages[url];
+            });
+
+            callback();
+        });
+    }
+    
+    $.plot.image.load = function (urls, callback) {
+        var missing = urls.length, loaded = {};
+        if (missing == 0)
+            callback({});
+
+        $.each(urls, function (i, url) {
+            var handler = function () {
+                --missing;
+                
+                loaded[url] = this;
+                
+                if (missing == 0)
+                    callback(loaded);
+            };
+
+            $('<img />').load(handler).error(handler).attr('src', url);
+        });
+    };
+    
+    function drawSeries(plot, ctx, series) {
+        var plotOffset = plot.getPlotOffset();
+        
+        if (!series.images || !series.images.show)
+            return;
+        
+        var points = series.datapoints.points,
+            ps = series.datapoints.pointsize;
+        
+        for (var i = 0; i < points.length; i += ps) {
+            var img = points[i],
+                x1 = points[i + 1], y1 = points[i + 2],
+                x2 = points[i + 3], y2 = points[i + 4],
+                xaxis = series.xaxis, yaxis = series.yaxis,
+                tmp;
+
+            // actually we should check img.complete, but it
+            // appears to be a somewhat unreliable indicator in
+            // IE6 (false even after load event)
+            if (!img || img.width <= 0 || img.height <= 0)
+                continue;
+
+            if (x1 > x2) {
+                tmp = x2;
+                x2 = x1;
+                x1 = tmp;
+            }
+            if (y1 > y2) {
+                tmp = y2;
+                y2 = y1;
+                y1 = tmp;
+            }
+            
+            // if the anchor is at the center of the pixel, expand the 
+            // image by 1/2 pixel in each direction
+            if (series.images.anchor == "center") {
+                tmp = 0.5 * (x2-x1) / (img.width - 1);
+                x1 -= tmp;
+                x2 += tmp;
+                tmp = 0.5 * (y2-y1) / (img.height - 1);
+                y1 -= tmp;
+                y2 += tmp;
+            }
+            
+            // clip
+            if (x1 == x2 || y1 == y2 ||
+                x1 >= xaxis.max || x2 <= xaxis.min ||
+                y1 >= yaxis.max || y2 <= yaxis.min)
+                continue;
+
+            var sx1 = 0, sy1 = 0, sx2 = img.width, sy2 = img.height;
+            if (x1 < xaxis.min) {
+                sx1 += (sx2 - sx1) * (xaxis.min - x1) / (x2 - x1);
+                x1 = xaxis.min;
+            }
+
+            if (x2 > xaxis.max) {
+                sx2 += (sx2 - sx1) * (xaxis.max - x2) / (x2 - x1);
+                x2 = xaxis.max;
+            }
+
+            if (y1 < yaxis.min) {
+                sy2 += (sy1 - sy2) * (yaxis.min - y1) / (y2 - y1);
+                y1 = yaxis.min;
+            }
+
+            if (y2 > yaxis.max) {
+                sy1 += (sy1 - sy2) * (yaxis.max - y2) / (y2 - y1);
+                y2 = yaxis.max;
+            }
+            
+            x1 = xaxis.p2c(x1);
+            x2 = xaxis.p2c(x2);
+            y1 = yaxis.p2c(y1);
+            y2 = yaxis.p2c(y2);
+            
+            // the transformation may have swapped us
+            if (x1 > x2) {
+                tmp = x2;
+                x2 = x1;
+                x1 = tmp;
+            }
+            if (y1 > y2) {
+                tmp = y2;
+                y2 = y1;
+                y1 = tmp;
+            }
+
+            tmp = ctx.globalAlpha;
+            ctx.globalAlpha *= series.images.alpha;
+            ctx.drawImage(img,
+                          sx1, sy1, sx2 - sx1, sy2 - sy1,
+                          x1 + plotOffset.left, y1 + plotOffset.top,
+                          x2 - x1, y2 - y1);
+            ctx.globalAlpha = tmp;
+        }
+    }
+
+    function processRawData(plot, series, data, datapoints) {
+        if (!series.images.show)
+            return;
+
+        // format is Image, x1, y1, x2, y2 (opposite corners)
+        datapoints.format = [
+            { required: true },
+            { x: true, number: true, required: true },
+            { y: true, number: true, required: true },
+            { x: true, number: true, required: true },
+            { y: true, number: true, required: true }
+        ];
+    }
+    
+    function init(plot) {
+        plot.hooks.processRawData.push(processRawData);
+        plot.hooks.drawSeries.push(drawSeries);
+    }
+    
+    $.plot.plugins.push({
+        init: init,
+        options: options,
+        name: 'image',
+        version: '1.1'
+    });
+})(jQuery);