diff options
author | Chris Schlaeger <chris@linux.com> | 2015-10-17 21:36:38 +0200 |
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committer | Chris Schlaeger <chris@linux.com> | 2015-10-17 21:36:38 +0200 |
commit | e30f267181d990947e67909de4809fa941698c85 (patch) | |
tree | 46e9f94c2b3699ed378963b420b8a8d361286ea1 /misc/openlayers/examples/canvas-inspector.js | |
parent | e763ceb183f389fcd314a4a6a712d87c9d4cdb32 (diff) | |
download | postrunner-e30f267181d990947e67909de4809fa941698c85.zip |
Upgrading openlayers to 3.x
Diffstat (limited to 'misc/openlayers/examples/canvas-inspector.js')
-rw-r--r-- | misc/openlayers/examples/canvas-inspector.js | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/misc/openlayers/examples/canvas-inspector.js b/misc/openlayers/examples/canvas-inspector.js deleted file mode 100644 index 064b4d5..0000000 --- a/misc/openlayers/examples/canvas-inspector.js +++ /dev/null @@ -1,91 +0,0 @@ - -var features = [ - - new OpenLayers.Feature.Vector( - OpenLayers.Geometry.fromWKT( - "LINESTRING(-90 90, 90 -90)" - ), - {color: "#0f0000"} - ), - - new OpenLayers.Feature.Vector( - OpenLayers.Geometry.fromWKT( - "LINESTRING(100 50, -100 -50)" - ), - {color: "#00ff00"} - ) - -]; - -var layer = new OpenLayers.Layer.Vector(null, { - styleMap: new OpenLayers.StyleMap({ - strokeWidth: 3, - strokeColor: "${color}" - }), - isBaseLayer: true, - renderers: ["Canvas"], - rendererOptions: {hitDetection: true} -}); -layer.addFeatures(features); - -var map = new OpenLayers.Map({ - div: "map", - layers: [layer], - center: new OpenLayers.LonLat(0, 0), - zoom: 0 -}); - -var xOff = 2, yOff = 2; - -var rows = 1 + (2 * yOff); -var cols = 1 + (2 * xOff); - -var template = new jugl.Template("template"); -template.process({ - clone: true, - parent: "inspector", - context: { - rows: rows, - cols: cols - } -}); - -function isDark(r, g, b, a) { - a = a / 255; - var da = 1 - a; - // convert color values to decimal (assume white background) - r = (a * r / 255) + da; - g = (a * g / 255) + da; - b = (a * b / 255) + da; - // use w3C brightness measure - var brightness = (r * 0.299) + (g * 0.587) + (b * 0.144); - return brightness < 0.5; -} - -var context = layer.renderer.canvas; //layer.renderer.hitContext; -var size = map.getSize(); -map.events.on({ - mousemove: function(event) { - var x = event.xy.x - 1; // TODO: fix this elsewhere - var y = event.xy.y; - if ((x >= xOff) && (x < size.w - xOff) && (y >= yOff) && (y < size.h - yOff)) { - var data = context.getImageData(x - xOff, y - yOff, rows, cols).data; - var offset, red, green, blue, alpha, cell; - for (var i=0; i<cols; ++i) { - for (var j=0; j<rows; ++j) { - offset = (i * 4) + (j * 4 * cols); - red = data[offset]; - green = data[offset + 1]; - blue = data[offset + 2]; - alpha = data[offset + 3]; - cell = document.getElementById("c" + i + "r" + j); - cell.innerHTML = "R: " + red + "<br>G: " + green + "<br>B: " + blue + "<br>A: " + alpha; - cell.style.backgroundColor = "rgba(" + red + ", " + green + ", " + blue + ", " + (alpha / 255) + ")"; - cell.style.color = isDark(red, green, blue, alpha) ? "#ffffff" : "#000000"; - } - } - } - } -}); - - |