| <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> |
| <html> |
| <head> |
| <script src="../../resources/js-test-pre.js"></script> |
| </head> |
| <body> |
| <script> |
| description("Series of tests to ensure correct behaviour of canvas.setTransform()"); |
| var ctx = document.createElement('canvas').getContext('2d'); |
| |
| // Reset the CTM to the initial matrix |
| ctx.beginPath(); |
| ctx.scale(0.5, 0.5); |
| ctx.setTransform(1, 0, 0, 1, 0, 0); |
| ctx.fillStyle = 'green'; |
| ctx.fillRect(0, 0, 100, 100); |
| |
| var imageData = ctx.getImageData(1, 1, 98, 98); |
| var imgdata = imageData.data; |
| shouldBe("imgdata[4]", "0"); |
| shouldBe("imgdata[5]", "128"); |
| shouldBe("imgdata[6]", "0"); |
| |
| // setTransform should not affect the current path |
| ctx.beginPath(); |
| ctx.rect(0,0,100,100); |
| ctx.save(); |
| ctx.setTransform(0.5, 0, 0, 0.5, 10, 10); |
| ctx.fillStyle = 'red'; |
| ctx.fillRect(0, 0, 100, 100); |
| ctx.restore(); |
| ctx.fillStyle = 'green'; |
| ctx.fillRect(0, 0, 100, 100); |
| |
| imageData = ctx.getImageData(1, 1, 98, 98); |
| imgdata = imageData.data; |
| shouldBe("imgdata[4]", "0"); |
| shouldBe("imgdata[5]", "128"); |
| shouldBe("imgdata[6]", "0"); |
| |
| // setTransform should not affect the CTM outside of save() and restore() |
| ctx.beginPath(); |
| ctx.fillStyle = 'green'; |
| ctx.save(); |
| ctx.setTransform(0.5, 0, 0, 0.5, 0, 0); |
| ctx.fillStyle = 'red'; |
| ctx.fillRect(0, 0, 100, 100); |
| ctx.restore(); |
| ctx.fillRect(0, 0, 100, 100); |
| |
| imageData = ctx.getImageData(1, 1, 98, 98); |
| imgdata = imageData.data; |
| shouldBe("imgdata[4]", "0"); |
| shouldBe("imgdata[5]", "128"); |
| shouldBe("imgdata[6]", "0"); |
| |
| |
| // stop drawing on not-invertible CTM |
| ctx.beginPath(); |
| ctx.fillStyle = 'green'; |
| ctx.fillRect(0, 0, 100, 100); |
| ctx.setTransform(0, 0, 0, 0, 0, 0); |
| ctx.fillStyle = 'red'; |
| ctx.fillRect(0, 0, 100, 100); |
| |
| imageData = ctx.getImageData(1, 1, 98, 98); |
| imgdata = imageData.data; |
| shouldBe("imgdata[4]", "0"); |
| shouldBe("imgdata[5]", "128"); |
| shouldBe("imgdata[6]", "0"); |
| |
| // setTransform with a not-invertible matrix should only stop the drawing up to the next restore() |
| ctx.beginPath(); |
| ctx.save(); |
| ctx.setTransform(0, 0, 0, 0, 0, 0); |
| ctx.fillStyle = 'red'; |
| ctx.fillRect(0, 0, 100, 100); |
| ctx.restore(); |
| ctx.fillStyle = 'green'; |
| ctx.fillRect(0, 0, 100, 100); |
| |
| imageData = ctx.getImageData(1, 1, 98, 98); |
| imgdata = imageData.data; |
| shouldBe("imgdata[4]", "0"); |
| shouldBe("imgdata[5]", "128"); |
| shouldBe("imgdata[6]", "0"); |
| </script> |
| <script src="../../resources/js-test-post.js"></script> |
| </body> |
| </html> |
