| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <body> |
| <script> |
| test(function(t) { |
| |
| var canvas = document.createElement('canvas'); |
| document.body.appendChild(canvas); |
| canvas.setAttribute('width', '700'); |
| canvas.setAttribute('height', '700'); |
| var ctx = canvas.getContext('2d'); |
| |
| // Verify default values. |
| assert_equals(ctx.lineDashOffset, 0); |
| |
| // Set dash-style. |
| ctx.setLineDash([15, 10]); |
| ctx.lineDashOffset = 5; |
| ctx.strokeRect (10,10,100,100); |
| |
| // Verify dash and offset. |
| var lineDash; |
| lineDash = ctx.getLineDash(); |
| assert_equals(lineDash[0], 15); |
| assert_equals(lineDash[1], 10); |
| assert_equals(ctx.lineDashOffset, 5); |
| |
| // Verify setting line dash to sequence of nulls is interpreted as zeros |
| ctx.setLineDash([null, null]); |
| lineDash = ctx.getLineDash(); |
| assert_equals(lineDash[0], 0); |
| assert_equals(lineDash[1], 0); |
| |
| // Set dash style to even number |
| ctx.setLineDash([5, 10, 15]); |
| ctx.strokeRect(20, 20, 120, 120); |
| |
| // Verify dash pattern is normalized |
| lineDash = ctx.getLineDash(); |
| assert_equals(lineDash[0], 5); |
| assert_equals(lineDash[1], 10); |
| assert_equals(lineDash[2], 15); |
| assert_equals(lineDash[3], 5); |
| assert_equals(lineDash[4], 10); |
| assert_equals(lineDash[5], 15); |
| |
| // Verify that conversion from string works |
| ctx.setLineDash(["1", 2]); |
| lineDash = ctx.getLineDash(); |
| assert_equals(lineDash[0], 1); |
| assert_equals(lineDash[1], 2); |
| |
| // Verify that line dash offset persists after |
| // clearRect (which causes a save/restore of the context |
| // state to the stack). |
| ctx.clearRect(0, 0, 700, 700); |
| assert_equals(ctx.lineDashOffset, 5); |
| |
| // Verify dash rendering |
| ctx.setLineDash([20, 10]); |
| ctx.lineDashOffset = 0; |
| ctx.lineWidth = 4; // To make the test immune to plaform anti-aliasing discrepancies |
| ctx.strokeStyle = '#00FF00'; |
| ctx.strokeRect(10.5, 10.5, 30, 30); |
| |
| assert_array_equals(ctx.getImageData(25, 10, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(35, 10, 1, 1).data, [0, 0, 0, 0]); |
| assert_array_equals(ctx.getImageData(40, 25, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(40, 35, 1, 1).data, [0, 0, 0, 0]); |
| assert_array_equals(ctx.getImageData(25, 40, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(15, 40, 1, 1).data, [0, 0, 0, 0]); |
| assert_array_equals(ctx.getImageData(10, 25, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(10, 15, 1, 1).data, [0, 0, 0, 0]); |
| |
| // Verify that lineDashOffset works as expected |
| ctx.lineDashOffset = 20; |
| ctx.strokeRect(50.5, 10.5, 30, 30); |
| assert_array_equals(ctx.getImageData(55, 10, 1, 1).data, [0, 0, 0, 0]); |
| assert_array_equals(ctx.getImageData(65, 10, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(80, 15, 1, 1).data, [0, 0, 0, 0]); |
| assert_array_equals(ctx.getImageData(80, 25, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(75, 40, 1, 1).data, [0, 0, 0, 0]); |
| assert_array_equals(ctx.getImageData(65, 40, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(50, 35, 1, 1).data, [0, 0, 0, 0]); |
| assert_array_equals(ctx.getImageData(50, 25, 1, 1).data, [0, 255, 0, 255]); |
| |
| // Verify negative lineDashOffset |
| ctx.lineDashOffset = -10; |
| ctx.strokeRect(90.5, 10.5, 30, 30); |
| assert_array_equals(ctx.getImageData(95, 10, 1, 1).data, [0, 0, 0, 0]); |
| assert_array_equals(ctx.getImageData(105, 10, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(120, 15, 1, 1).data, [0, 0, 0, 0]); |
| assert_array_equals(ctx.getImageData(120, 25, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(115, 40, 1, 1).data, [0, 0, 0, 0]); |
| assert_array_equals(ctx.getImageData(105, 40, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(90, 35, 1, 1).data, [0, 0, 0, 0]); |
| assert_array_equals(ctx.getImageData(90, 25, 1, 1).data, [0, 255, 0, 255]); |
| |
| // Verify that all zero dash sequence results in no dashing |
| ctx.setLineDash([0, 0]); |
| ctx.lineDashOffset = 0; |
| ctx.strokeRect(130.5, 10.5, 30, 30); |
| assert_array_equals(ctx.getImageData(130, 10, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(130, 15, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(130, 25, 1, 1).data, [0, 255, 0, 255]); |
| assert_array_equals(ctx.getImageData(130, 35, 1, 1).data, [0, 255, 0, 255]); |
| |
| }, "Basic test for setLineDash, getLineDash and lineDashOffset"); |
| </script> |
| </body> |
