| <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> |
| <html> |
| <head> |
| <script src="../../resources/js-test-pre.js"></script> |
| </head> |
| <body> |
| <script> |
| description("This tests behaviour of path modification APIs on an empty path."); |
| var canvas = document.createElement('canvas'); |
| canvas.width=300; |
| canvas.height=300; |
| var ctx = canvas.getContext('2d'); |
| |
| function getColor(x,y) { |
| var imageData = ctx.getImageData(x, y, 1, 1); |
| var data = imageData.data; |
| return [data[0], data[1], data[2], data[3]]; |
| } |
| |
| // Test no drawing cases |
| ctx.fillStyle = 'green'; |
| ctx.strokeStyle = 'red'; |
| ctx.lineWidth = 50; |
| |
| debug("Test lineTo") |
| ctx.beginPath(); |
| ctx.fillRect(0, 0, 100, 100); |
| ctx.lineTo(50, 50); |
| ctx.stroke(); |
| shouldBe("getColor(40,40)", "[0,128,0,255]"); |
| ctx.clearRect(0, 0, 300, 300); |
| |
| // Test when create rectangle path using a rectangle with width = height = 0. |
| debug("Test canvas.rect() with width = height = 0."); |
| ctx.strokeStyle = 'red'; |
| ctx.lineWidth = 10; |
| ctx.beginPath(); |
| ctx.rect(0, 0, 0, 0); |
| ctx.stroke(); |
| shouldBe("getColor(1,1)", "[0,0,0,0]"); |
| ctx.clearRect(0, 0, 300, 300); |
| |
| // Test path modifications that result in drawing |
| ctx.fillStyle = 'red'; |
| ctx.strokeStyle = 'green'; |
| |
| debug("Test lineTo sequence") |
| ctx.beginPath(); |
| ctx.fillRect(0, 0, 100, 100); |
| ctx.lineTo(0, 50); |
| ctx.lineTo(100, 50); |
| ctx.stroke(); |
| shouldBe("getColor(0,0)", "[255,0,0,255]"); |
| shouldBe("getColor(50,50)", "[0,128,0,255]"); |
| ctx.clearRect(0, 0, 300, 300); |
| |
| debug("Test quadraticCurveTo") |
| ctx.beginPath(); |
| ctx.fillRect(0, 0, 100, 100); |
| ctx.quadraticCurveTo(0, 50, 100, 50); |
| ctx.stroke(); |
| shouldBe("getColor(10,10)", "[255,0,0,255]"); |
| shouldBe("getColor(50,50)", "[0,128,0,255]"); |
| ctx.clearRect(0, 0, 300, 300); |
| |
| debug("Test quadraticCurveTo endpoint") |
| ctx.beginPath(); |
| ctx.fillRect(0, 0, 100, 100); |
| ctx.quadraticCurveTo(0, 50, 100, 50); |
| ctx.lineTo(50, 100); |
| ctx.stroke(); |
| shouldBe("getColor(10,10)", "[255,0,0,255]"); |
| shouldBe("getColor(99,51)", "[0,128,0,255]"); |
| shouldBe("getColor(50,50)", "[0,128,0,255]"); |
| ctx.clearRect(0, 0, 300, 300); |
| |
| debug("Test bezierCurveTo") |
| ctx.beginPath(); |
| ctx.fillRect(0, 0, 100, 100); |
| ctx.bezierCurveTo(0, 50, 50, 50, 100, 50); |
| ctx.stroke(); |
| shouldBe("getColor(10,10)", "[255,0,0,255]"); |
| shouldBe("getColor(50,50)", "[0,128,0,255]"); |
| ctx.clearRect(0, 0, 300, 300); |
| |
| debug("Test bezierCurveTo endpoint") |
| ctx.beginPath(); |
| ctx.fillRect(0, 0, 100, 100); |
| ctx.bezierCurveTo(0, 50, 50, 50, 100, 50); |
| ctx.stroke(); |
| ctx.lineTo(50, 100); |
| ctx.stroke(); |
| shouldBe("getColor(10,10)", "[255,0,0,255]"); |
| shouldBe("getColor(99,51)", "[0,128,0,255]"); |
| shouldBe("getColor(50,50)", "[0,128,0,255]"); |
| ctx.clearRect(0, 0, 300, 300); |
| </script> |
| <script src="../../resources/js-test-post.js"></script> |
| </body> |
| </html> |
