- name: 2d.imageData.create2.basic desc: createImageData(sw, sh) exists and returns something code: | @assert ctx.createImageData(1, 1) !== null; - name: 2d.imageData.create1.basic desc: createImageData(imgdata) exists and returns something code: | @assert ctx.createImageData(ctx.createImageData(1, 1)) !== null; - name: 2d.imageData.create2.type desc: createImageData(sw, sh) returns an ImageData object containing a Uint8ClampedArray object canvasType: ['HTMLCanvas'] code: | @assert window.ImageData !== undefined; @assert window.Uint8ClampedArray !== undefined; window.ImageData.prototype.thisImplementsImageData = true; window.Uint8ClampedArray.prototype.thisImplementsUint8ClampedArray = true; var imgdata = ctx.createImageData(1, 1); @assert imgdata.thisImplementsImageData; @assert imgdata.data.thisImplementsUint8ClampedArray; - name: 2d.imageData.create1.type desc: createImageData(imgdata) returns an ImageData object containing a Uint8ClampedArray object canvasType: ['HTMLCanvas'] code: | @assert window.ImageData !== undefined; @assert window.Uint8ClampedArray !== undefined; window.ImageData.prototype.thisImplementsImageData = true; window.Uint8ClampedArray.prototype.thisImplementsUint8ClampedArray = true; var imgdata = ctx.createImageData(ctx.createImageData(1, 1)); @assert imgdata.thisImplementsImageData; @assert imgdata.data.thisImplementsUint8ClampedArray; - name: 2d.imageData.create2.this desc: createImageData(sw, sh) should throw when called with the wrong |this| canvasType: ['HTMLCanvas'] notes: &bindings Defined in "Web IDL" (draft) code: | @assert throws TypeError CanvasRenderingContext2D.prototype.createImageData.call(null, 1, 1); @moz-todo @assert throws TypeError CanvasRenderingContext2D.prototype.createImageData.call(undefined, 1, 1); @moz-todo @assert throws TypeError CanvasRenderingContext2D.prototype.createImageData.call({}, 1, 1); @moz-todo - name: 2d.imageData.create1.this desc: createImageData(imgdata) should throw when called with the wrong |this| canvasType: ['HTMLCanvas'] notes: *bindings code: | var imgdata = ctx.createImageData(1, 1); @assert throws TypeError CanvasRenderingContext2D.prototype.createImageData.call(null, imgdata); @moz-todo @assert throws TypeError CanvasRenderingContext2D.prototype.createImageData.call(undefined, imgdata); @moz-todo @assert throws TypeError CanvasRenderingContext2D.prototype.createImageData.call({}, imgdata); @moz-todo - name: 2d.imageData.create2.initial desc: createImageData(sw, sh) returns transparent black data of the right size code: | var imgdata = ctx.createImageData(10, 20); @assert imgdata.data.length === imgdata.width*imgdata.height*4; @assert imgdata.width < imgdata.height; @assert imgdata.width > 0; var isTransparentBlack = true; for (var i = 0; i < imgdata.data.length; ++i) if (imgdata.data[i] !== 0) isTransparentBlack = false; @assert isTransparentBlack; - name: 2d.imageData.create1.initial desc: createImageData(imgdata) returns transparent black data of the right size code: | ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 100, 50); var imgdata1 = ctx.getImageData(0, 0, 10, 20); var imgdata2 = ctx.createImageData(imgdata1); @assert imgdata2.data.length === imgdata1.data.length; @assert imgdata2.width === imgdata1.width; @assert imgdata2.height === imgdata1.height; var isTransparentBlack = true; for (var i = 0; i < imgdata2.data.length; ++i) if (imgdata2.data[i] !== 0) isTransparentBlack = false; @assert isTransparentBlack; - name: 2d.imageData.create2.large desc: createImageData(sw, sh) works for sizes much larger than the canvas code: | var imgdata = ctx.createImageData(1000, 2000); @assert imgdata.data.length === imgdata.width*imgdata.height*4; @assert imgdata.width < imgdata.height; @assert imgdata.width > 0; var isTransparentBlack = true; for (var i = 0; i < imgdata.data.length; i += 7813) // check ~1024 points (assuming normal scaling) if (imgdata.data[i] !== 0) isTransparentBlack = false; @assert isTransparentBlack; - name: 2d.imageData.create2.negative desc: createImageData(sw, sh) takes the absolute magnitude of the size arguments code: | var imgdata1 = ctx.createImageData(10, 20); var imgdata2 = ctx.createImageData(-10, 20); var imgdata3 = ctx.createImageData(10, -20); var imgdata4 = ctx.createImageData(-10, -20); @assert imgdata1.data.length === imgdata2.data.length; @assert imgdata2.data.length === imgdata3.data.length; @assert imgdata3.data.length === imgdata4.data.length; - name: 2d.imageData.create2.zero desc: createImageData(sw, sh) throws INDEX_SIZE_ERR if size is zero code: | @assert throws INDEX_SIZE_ERR ctx.createImageData(10, 0); @assert throws INDEX_SIZE_ERR ctx.createImageData(0, 10); @assert throws INDEX_SIZE_ERR ctx.createImageData(0, 0); @assert throws INDEX_SIZE_ERR ctx.createImageData(0.99, 10); @assert throws INDEX_SIZE_ERR ctx.createImageData(10, 0.1); - name: 2d.imageData.create2.nonfinite desc: createImageData() throws TypeError if arguments are not finite notes: *bindings code: | @nonfinite @assert throws TypeError ctx.createImageData(<10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>); var posinfobj = { valueOf: function() { return Infinity; } }, neginfobj = { valueOf: function() { return -Infinity; } }, nanobj = { valueOf: function() { return -Infinity; } }; @nonfinite @assert throws TypeError ctx.createImageData(<10 posinfobj neginfobj nanobj>, <10 posinfobj neginfobj nanobj>); - name: 2d.imageData.create1.zero desc: createImageData(null) throws TypeError code: | @assert throws TypeError ctx.createImageData(null); - name: 2d.imageData.create2.double desc: createImageData(w, h) double is converted to long code: | var imgdata1 = ctx.createImageData(10.01, 10.99); var imgdata2 = ctx.createImageData(-10.01, -10.99); @assert imgdata1.width === 10; @assert imgdata1.height === 10; @assert imgdata2.width === 10; @assert imgdata2.height === 10; - name: 2d.imageData.get.double desc: createImageData(w, h) double is converted to long code: | var imgdata1 = ctx.getImageData(0, 0, 10.01, 10.99); var imgdata2 = ctx.getImageData(0, 0, -10.01, -10.99); @assert imgdata1.width === 10; @assert imgdata1.height === 10; @assert imgdata2.width === 10; @assert imgdata2.height === 10; - name: 2d.imageData.create2.round desc: createImageData(w, h) is rounded the same as getImageData(0, 0, w, h) code: | var imgdata1 = ctx.createImageData(10.01, 10.99); var imgdata2 = ctx.getImageData(0, 0, 10.01, 10.99); @assert imgdata1.width === imgdata2.width; @assert imgdata1.height === imgdata2.height; - name: 2d.imageData.create.and.resize desc: Verify no crash when resizing an image bitmap to zero. canvasType: ['HTMLCanvas'] images: - red.png code: | var image = new Image(); image.onload = t.step_func(function() { var options = { resizeHeight: 0 }; var p1 = createImageBitmap(image, options); p1.catch(function(error){}); t.done(); }); image.src = 'red.png'; - name: 2d.imageData.get.basic desc: getImageData() exists and returns something code: | @assert ctx.getImageData(0, 0, 100, 50) !== null; - name: 2d.imageData.get.type canvasType: ['HTMLCanvas'] desc: getImageData() returns an ImageData object containing a Uint8ClampedArray object code: | @assert window.ImageData !== undefined; @assert window.Uint8ClampedArray !== undefined; window.ImageData.prototype.thisImplementsImageData = true; window.Uint8ClampedArray.prototype.thisImplementsUint8ClampedArray = true; var imgdata = ctx.getImageData(0, 0, 1, 1); @assert imgdata.thisImplementsImageData; @assert imgdata.data.thisImplementsUint8ClampedArray; - name: 2d.imageData.get.zero desc: getImageData() throws INDEX_SIZE_ERR if size is zero code: | @assert throws INDEX_SIZE_ERR ctx.getImageData(1, 1, 10, 0); @assert throws INDEX_SIZE_ERR ctx.getImageData(1, 1, 0, 10); @assert throws INDEX_SIZE_ERR ctx.getImageData(1, 1, 0, 0); @assert throws INDEX_SIZE_ERR ctx.getImageData(1, 1, 0.1, 10); @assert throws INDEX_SIZE_ERR ctx.getImageData(1, 1, 10, 0.99); @assert throws INDEX_SIZE_ERR ctx.getImageData(1, 1, -0.1, 10); @assert throws INDEX_SIZE_ERR ctx.getImageData(1, 1, 10, -0.99); - name: 2d.imageData.get.nonfinite desc: getImageData() throws TypeError if arguments are not finite notes: *bindings code: | @nonfinite @assert throws TypeError ctx.getImageData(<10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>); var posinfobj = { valueOf: function() { return Infinity; } }, neginfobj = { valueOf: function() { return -Infinity; } }, nanobj = { valueOf: function() { return -Infinity; } }; @nonfinite @assert throws TypeError ctx.getImageData(<10 posinfobj neginfobj nanobj>, <10 posinfobj neginfobj nanobj>, <10 posinfobj neginfobj nanobj>, <10 posinfobj neginfobj nanobj>); - name: 2d.imageData.get.source.outside desc: getImageData() returns transparent black outside the canvas code: | ctx.fillStyle = '#08f'; ctx.fillRect(0, 0, 100, 50); var imgdata1 = ctx.getImageData(-10, 5, 1, 1); @assert imgdata1.data[0] === 0; @assert imgdata1.data[1] === 0; @assert imgdata1.data[2] === 0; @assert imgdata1.data[3] === 0; var imgdata2 = ctx.getImageData(10, -5, 1, 1); @assert imgdata2.data[0] === 0; @assert imgdata2.data[1] === 0; @assert imgdata2.data[2] === 0; @assert imgdata2.data[3] === 0; var imgdata3 = ctx.getImageData(200, 5, 1, 1); @assert imgdata3.data[0] === 0; @assert imgdata3.data[1] === 0; @assert imgdata3.data[2] === 0; @assert imgdata3.data[3] === 0; var imgdata4 = ctx.getImageData(10, 60, 1, 1); @assert imgdata4.data[0] === 0; @assert imgdata4.data[1] === 0; @assert imgdata4.data[2] === 0; @assert imgdata4.data[3] === 0; var imgdata5 = ctx.getImageData(100, 10, 1, 1); @assert imgdata5.data[0] === 0; @assert imgdata5.data[1] === 0; @assert imgdata5.data[2] === 0; @assert imgdata5.data[3] === 0; var imgdata6 = ctx.getImageData(0, 10, 1, 1); @assert imgdata6.data[0] === 0; @assert imgdata6.data[1] === 136; @assert imgdata6.data[2] === 255; @assert imgdata6.data[3] === 255; var imgdata7 = ctx.getImageData(-10, 10, 20, 20); @assert imgdata7.data[ 0*4+0] === 0; @assert imgdata7.data[ 0*4+1] === 0; @assert imgdata7.data[ 0*4+2] === 0; @assert imgdata7.data[ 0*4+3] === 0; @assert imgdata7.data[ 9*4+0] === 0; @assert imgdata7.data[ 9*4+1] === 0; @assert imgdata7.data[ 9*4+2] === 0; @assert imgdata7.data[ 9*4+3] === 0; @assert imgdata7.data[10*4+0] === 0; @assert imgdata7.data[10*4+1] === 136; @assert imgdata7.data[10*4+2] === 255; @assert imgdata7.data[10*4+3] === 255; @assert imgdata7.data[19*4+0] === 0; @assert imgdata7.data[19*4+1] === 136; @assert imgdata7.data[19*4+2] === 255; @assert imgdata7.data[19*4+3] === 255; @assert imgdata7.data[20*4+0] === 0; @assert imgdata7.data[20*4+1] === 0; @assert imgdata7.data[20*4+2] === 0; @assert imgdata7.data[20*4+3] === 0; - name: 2d.imageData.get.source.negative desc: getImageData() works with negative width and height, and returns top-to-bottom left-to-right code: | ctx.fillStyle = '#000'; ctx.fillRect(0, 0, 100, 50); ctx.fillStyle = '#fff'; ctx.fillRect(20, 10, 60, 10); var imgdata1 = ctx.getImageData(85, 25, -10, -10); @assert imgdata1.data[0] === 255; @assert imgdata1.data[1] === 255; @assert imgdata1.data[2] === 255; @assert imgdata1.data[3] === 255; @assert imgdata1.data[imgdata1.data.length-4+0] === 0; @assert imgdata1.data[imgdata1.data.length-4+1] === 0; @assert imgdata1.data[imgdata1.data.length-4+2] === 0; @assert imgdata1.data[imgdata1.data.length-4+3] === 255; var imgdata2 = ctx.getImageData(0, 0, -1, -1); @assert imgdata2.data[0] === 0; @assert imgdata2.data[1] === 0; @assert imgdata2.data[2] === 0; @assert imgdata2.data[3] === 0; - name: 2d.imageData.get.source.size desc: getImageData() returns bigger ImageData for bigger source rectangle code: | var imgdata1 = ctx.getImageData(0, 0, 10, 10); var imgdata2 = ctx.getImageData(0, 0, 20, 20); @assert imgdata2.width > imgdata1.width; @assert imgdata2.height > imgdata1.height; - name: 2d.imageData.get.nonpremul desc: getImageData() returns non-premultiplied colors code: | ctx.fillStyle = 'rgba(255, 255, 255, 0.5)'; ctx.fillRect(0, 0, 100, 50); var imgdata = ctx.getImageData(10, 10, 10, 10); @assert imgdata.data[0] > 200; @assert imgdata.data[1] > 200; @assert imgdata.data[2] > 200; @assert imgdata.data[3] > 100; @assert imgdata.data[3] < 200; - name: 2d.imageData.get.range desc: getImageData() returns values in the range [0, 255] code: | ctx.fillStyle = '#000'; ctx.fillRect(0, 0, 100, 50); ctx.fillStyle = '#fff'; ctx.fillRect(20, 10, 60, 10); var imgdata1 = ctx.getImageData(10, 5, 1, 1); @assert imgdata1.data[0] === 0; var imgdata2 = ctx.getImageData(30, 15, 1, 1); @assert imgdata2.data[0] === 255; - name: 2d.imageData.get.clamp desc: getImageData() clamps colors to the range [0, 255] code: | ctx.fillStyle = 'rgb(-100, -200, -300)'; ctx.fillRect(0, 0, 100, 50); ctx.fillStyle = 'rgb(256, 300, 400)'; ctx.fillRect(20, 10, 60, 10); var imgdata1 = ctx.getImageData(10, 5, 1, 1); @assert imgdata1.data[0] === 0; @assert imgdata1.data[1] === 0; @assert imgdata1.data[2] === 0; var imgdata2 = ctx.getImageData(30, 15, 1, 1); @assert imgdata2.data[0] === 255; @assert imgdata2.data[1] === 255; @assert imgdata2.data[2] === 255; - name: 2d.imageData.get.length desc: getImageData() returns a correctly-sized Uint8ClampedArray code: | var imgdata = ctx.getImageData(0, 0, 10, 10); @assert imgdata.data.length === imgdata.width*imgdata.height*4; - name: 2d.imageData.get.order.cols desc: getImageData() returns leftmost columns first code: | ctx.fillStyle = '#fff'; ctx.fillRect(0, 0, 100, 50); ctx.fillStyle = '#000'; ctx.fillRect(0, 0, 2, 50); var imgdata = ctx.getImageData(0, 0, 10, 10); @assert imgdata.data[0] === 0; @assert imgdata.data[Math.round(imgdata.width/2*4)] === 255; @assert imgdata.data[Math.round((imgdata.height/2)*imgdata.width*4)] === 0; - name: 2d.imageData.get.order.rows desc: getImageData() returns topmost rows first code: | ctx.fillStyle = '#fff'; ctx.fillRect(0, 0, 100, 50); ctx.fillStyle = '#000'; ctx.fillRect(0, 0, 100, 2); var imgdata = ctx.getImageData(0, 0, 10, 10); @assert imgdata.data[0] === 0; @assert imgdata.data[Math.floor(imgdata.width/2*4)] === 0; @assert imgdata.data[(imgdata.height/2)*imgdata.width*4] === 255; - name: 2d.imageData.get.order.rgb desc: getImageData() returns R then G then B code: | ctx.fillStyle = '#48c'; ctx.fillRect(0, 0, 100, 50); var imgdata = ctx.getImageData(0, 0, 10, 10); @assert imgdata.data[0] === 0x44; @assert imgdata.data[1] === 0x88; @assert imgdata.data[2] === 0xCC; @assert imgdata.data[3] === 255; @assert imgdata.data[4] === 0x44; @assert imgdata.data[5] === 0x88; @assert imgdata.data[6] === 0xCC; @assert imgdata.data[7] === 255; - name: 2d.imageData.get.order.alpha desc: getImageData() returns A in the fourth component code: | ctx.fillStyle = 'rgba(0, 0, 0, 0.5)'; ctx.fillRect(0, 0, 100, 50); var imgdata = ctx.getImageData(0, 0, 10, 10); @assert imgdata.data[3] < 200; @assert imgdata.data[3] > 100; - name: 2d.imageData.get.unaffected desc: getImageData() is not affected by context state code: | ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 50, 50) ctx.fillStyle = '#f00'; ctx.fillRect(50, 0, 50, 50) ctx.save(); ctx.translate(50, 0); ctx.globalAlpha = 0.1; ctx.globalCompositeOperation = 'destination-atop'; ctx.shadowColor = '#f00'; ctx.rect(0, 0, 5, 5); ctx.clip(); var imgdata = ctx.getImageData(0, 0, 50, 50); ctx.restore(); ctx.putImageData(imgdata, 50, 0); @assert pixel 25,25 ==~ 0,255,0,255; @assert pixel 75,25 ==~ 0,255,0,255; expected: green - name: 2d.imageData.get.large.crash desc: Test that canvas crash when image data cannot be allocated. code: | @assert throws TypeError ctx.getImageData(10, 0xffffffff, 2147483647, 10); - name: 2d.imageData.get.rounding desc: Test the handling of non-integer source coordinates in getImageData(). code: | function testDimensions(sx, sy, sw, sh, width, height) { imageData = ctx.getImageData(sx, sy, sw, sh); @assert imageData.width == width; @assert imageData.height == height; } testDimensions(0, 0, 20, 10, 20, 10); testDimensions(.1, .2, 20, 10, 20, 10); testDimensions(.9, .8, 20, 10, 20, 10); testDimensions(0, 0, 20.9, 10.9, 20, 10); testDimensions(0, 0, 20.1, 10.1, 20, 10); testDimensions(-1, -1, 20, 10, 20, 10); testDimensions(-1.1, 0, 20, 10, 20, 10); testDimensions(-1.9, 0, 20, 10, 20, 10); - name: 2d.imageData.get.invalid desc: Verify getImageData() behavior in invalid cases. code: | imageData = ctx.getImageData(0,0,2,2); var testValues = [NaN, true, false, "\"garbage\"", "-1", "0", "1", "2", Infinity, -Infinity, -5, -0.5, 0, 0.5, 5, 5.4, 255, 256, null, undefined]; var testResults = [0, 1, 0, 0, 0, 0, 1, 2, 255, 0, 0, 0, 0, 0, 5, 5, 255, 255, 0, 0]; for (var i = 0; i < testValues.length; i++) { imageData.data[0] = testValues[i]; @assert imageData.data[0] == testResults[i]; } imageData.data['foo']='garbage'; @assert imageData.data['foo'] == 'garbage'; imageData.data[-1]='garbage'; @assert imageData.data[-1] == undefined; imageData.data[17]='garbage'; @assert imageData.data[17] == undefined; - name: 2d.imageData.object.properties desc: ImageData objects have the right properties code: | var imgdata = ctx.getImageData(0, 0, 10, 10); @assert typeof(imgdata.width) === 'number'; @assert typeof(imgdata.height) === 'number'; @assert typeof(imgdata.data) === 'object'; - name: 2d.imageData.object.readonly desc: ImageData objects properties are read-only code: | var imgdata = ctx.getImageData(0, 0, 10, 10); var w = imgdata.width; var h = imgdata.height; var d = imgdata.data; imgdata.width = 123; imgdata.height = 123; imgdata.data = [100,100,100,100]; @assert imgdata.width === w; @assert imgdata.height === h; @assert imgdata.data === d; @assert imgdata.data[0] === 0; @assert imgdata.data[1] === 0; @assert imgdata.data[2] === 0; @assert imgdata.data[3] === 0; - name: 2d.imageData.object.ctor.size canvasType: ['HTMLCanvas'] desc: ImageData has a usable constructor code: | @assert window.ImageData !== undefined; var imgdata = new window.ImageData(2, 3); @assert imgdata.width === 2; @assert imgdata.height === 3; @assert imgdata.data.length === 2 * 3 * 4; for (var i = 0; i < imgdata.data.length; ++i) { @assert imgdata.data[i] === 0; } - name: 2d.imageData.object.ctor.basics canvasType: ['HTMLCanvas'] desc: Testing different type of ImageData constructor code: | function setRGBA(imageData, i, rgba) { var s = i * 4; imageData[s] = rgba[0]; imageData[s + 1] = rgba[1]; imageData[s + 2] = rgba[2]; imageData[s + 3] = rgba[3]; } function getRGBA(imageData, i) { var result = []; var s = i * 4; for (var j = 0; j < 4; j++) { result[j] = imageData[s + j]; } return result; } function assertArrayEquals(actual, expected) { @assert typeof actual === "object"; @assert actual !== null; @assert "length" in actual === true; @assert actual.length === expected.length; for (var i = 0; i < actual.length; i++) { @assert actual.hasOwnProperty(i) === expected.hasOwnProperty(i); @assert actual[i] === expected[i]; } } @assert ImageData !== undefined; imageData = new ImageData(100, 50); @assert imageData !== null; @assert imageData.data !== null; @assert imageData.width === 100; @assert imageData.height === 50; assertArrayEquals(getRGBA(imageData.data, 4), [0, 0, 0, 0]); var testColor = [0, 255, 255, 128]; setRGBA(imageData.data, 4, testColor); assertArrayEquals(getRGBA(imageData.data, 4), testColor); @assert throws TypeError ImageData(1, 1); @assert throws TypeError new ImageData(10); @assert throws INDEX_SIZE_ERR new ImageData(0, 10); @assert throws INDEX_SIZE_ERR new ImageData(10, 0); @assert throws INDEX_SIZE_ERR new ImageData('width', 'height'); @assert throws INDEX_SIZE_ERR new ImageData(1 << 31, 1 << 31); @assert throws TypeError new ImageData(new Uint8ClampedArray(0)); @assert throws INDEX_SIZE_ERR new ImageData(new Uint8Array(100), 25); @assert throws INVALID_STATE_ERR new ImageData(new Uint8ClampedArray(27), 2); @assert throws INDEX_SIZE_ERR new ImageData(new Uint8ClampedArray(28), 7, 0); @assert throws INDEX_SIZE_ERR new ImageData(new Uint8ClampedArray(104), 14); @assert throws INDEX_SIZE_ERR new ImageData(new Uint8ClampedArray([12, 34, 168, 65328]), 1, 151); @assert throws TypeError new ImageData(self, 4, 4); @assert throws TypeError new ImageData(null, 4, 4); @assert throws INDEX_SIZE_ERR new ImageData(imageData.data, 0); @assert throws INDEX_SIZE_ERR new ImageData(imageData.data, 13); @assert throws INDEX_SIZE_ERR new ImageData(imageData.data, 1 << 31); @assert throws INDEX_SIZE_ERR new ImageData(imageData.data, 'biggish'); @assert throws INDEX_SIZE_ERR new ImageData(imageData.data, 1 << 24, 1 << 31); @assert new ImageData(new Uint8ClampedArray(28), 7).height === 1; imageDataFromData = new ImageData(imageData.data, 100); @assert imageDataFromData.width === 100; @assert imageDataFromData.height === 50; @assert imageDataFromData.data === imageData.data; assertArrayEquals(getRGBA(imageDataFromData.data, 10), getRGBA(imageData.data, 10)); setRGBA(imageData.data, 10, testColor); assertArrayEquals(getRGBA(imageDataFromData.data, 10), getRGBA(imageData.data, 10)); var data = new Uint8ClampedArray(400); data[22] = 129; imageDataFromData = new ImageData(data, 20, 5); @assert imageDataFromData.width === 20; @assert imageDataFromData.height === 5; @assert imageDataFromData.data === data; assertArrayEquals(getRGBA(imageDataFromData.data, 2), getRGBA(data, 2)); setRGBA(imageDataFromData.data, 2, testColor); assertArrayEquals(getRGBA(imageDataFromData.data, 2), getRGBA(data, 2)); if (window.SharedArrayBuffer) { @assert throws TypeError new ImageData(new Uint16Array(new SharedArrayBuffer(32)), 4, 2); } - name: 2d.imageData.object.ctor.array desc: ImageData has a usable constructor canvasType: ['HTMLCanvas'] code: | @assert window.ImageData !== undefined; var array = new Uint8ClampedArray(8); var imgdata = new window.ImageData(array, 1, 2); @assert imgdata.width === 1; @assert imgdata.height === 2; @assert imgdata.data === array; - name: 2d.imageData.object.ctor.array.bounds desc: ImageData has a usable constructor canvasType: ['HTMLCanvas'] code: | @assert window.ImageData !== undefined; @assert throws INVALID_STATE_ERR new ImageData(new Uint8ClampedArray(0), 1); @assert throws INVALID_STATE_ERR new ImageData(new Uint8ClampedArray(3), 1); @assert throws INDEX_SIZE_ERR new ImageData(new Uint8ClampedArray(4), 0); @assert throws INDEX_SIZE_ERR new ImageData(new Uint8ClampedArray(4), 1, 2); @assert throws TypeError new ImageData(new Uint8Array(8), 1, 2); @assert throws TypeError new ImageData(new Int8Array(8), 1, 2); - name: 2d.imageData.object.set desc: ImageData.data can be modified code: | var imgdata = ctx.getImageData(0, 0, 10, 10); imgdata.data[0] = 100; @assert imgdata.data[0] === 100; imgdata.data[0] = 200; @assert imgdata.data[0] === 200; - name: 2d.imageData.object.undefined desc: ImageData.data converts undefined to 0 webidl: - es-octet code: | var imgdata = ctx.getImageData(0, 0, 10, 10); imgdata.data[0] = 100; imgdata.data[0] = undefined; @assert imgdata.data[0] === 0; - name: 2d.imageData.object.nan desc: ImageData.data converts NaN to 0 webidl: - es-octet code: | var imgdata = ctx.getImageData(0, 0, 10, 10); imgdata.data[0] = 100; imgdata.data[0] = NaN; @assert imgdata.data[0] === 0; imgdata.data[0] = 100; imgdata.data[0] = "cheese"; @assert imgdata.data[0] === 0; - name: 2d.imageData.object.string desc: ImageData.data converts strings to numbers with ToNumber webidl: - es-octet code: | var imgdata = ctx.getImageData(0, 0, 10, 10); imgdata.data[0] = 100; imgdata.data[0] = "110"; @assert imgdata.data[0] === 110; imgdata.data[0] = 100; imgdata.data[0] = "0x78"; @assert imgdata.data[0] === 120; imgdata.data[0] = 100; imgdata.data[0] = " +130e0 "; @assert imgdata.data[0] === 130; - name: 2d.imageData.object.clamp desc: ImageData.data clamps numbers to [0, 255] webidl: - es-octet code: | var imgdata = ctx.getImageData(0, 0, 10, 10); imgdata.data[0] = 100; imgdata.data[0] = 300; @assert imgdata.data[0] === 255; imgdata.data[0] = 100; imgdata.data[0] = -100; @assert imgdata.data[0] === 0; imgdata.data[0] = 100; imgdata.data[0] = 200+Math.pow(2, 32); @assert imgdata.data[0] === 255; imgdata.data[0] = 100; imgdata.data[0] = -200-Math.pow(2, 32); @assert imgdata.data[0] === 0; imgdata.data[0] = 100; imgdata.data[0] = Math.pow(10, 39); @assert imgdata.data[0] === 255; imgdata.data[0] = 100; imgdata.data[0] = -Math.pow(10, 39); @assert imgdata.data[0] === 0; imgdata.data[0] = 100; imgdata.data[0] = -Infinity; @assert imgdata.data[0] === 0; imgdata.data[0] = 100; imgdata.data[0] = Infinity; @assert imgdata.data[0] === 255; - name: 2d.imageData.object.round desc: ImageData.data rounds numbers with round-to-zero webidl: - es-octet code: | var imgdata = ctx.getImageData(0, 0, 10, 10); imgdata.data[0] = 0.499; @assert imgdata.data[0] === 0; imgdata.data[0] = 0.5; @assert imgdata.data[0] === 0; imgdata.data[0] = 0.501; @assert imgdata.data[0] === 1; imgdata.data[0] = 1.499; @assert imgdata.data[0] === 1; imgdata.data[0] = 1.5; @assert imgdata.data[0] === 2; imgdata.data[0] = 1.501; @assert imgdata.data[0] === 2; imgdata.data[0] = 2.5; @assert imgdata.data[0] === 2; imgdata.data[0] = 3.5; @assert imgdata.data[0] === 4; imgdata.data[0] = 252.5; @assert imgdata.data[0] === 252; imgdata.data[0] = 253.5; @assert imgdata.data[0] === 254; imgdata.data[0] = 254.5; @assert imgdata.data[0] === 254; imgdata.data[0] = 256.5; @assert imgdata.data[0] === 255; imgdata.data[0] = -0.5; @assert imgdata.data[0] === 0; imgdata.data[0] = -1.5; @assert imgdata.data[0] === 0; - name: 2d.imageData.put.null desc: putImageData() with null imagedata throws TypeError code: | @assert throws TypeError ctx.putImageData(null, 0, 0); - name: 2d.imageData.put.nonfinite desc: putImageData() throws TypeError if arguments are not finite notes: *bindings code: | var imgdata = ctx.getImageData(0, 0, 10, 10); @nonfinite @assert throws TypeError ctx.putImageData(, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>); @nonfinite @assert throws TypeError ctx.putImageData(, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>); - name: 2d.imageData.put.basic desc: putImageData() puts image data from getImageData() onto the canvas code: | ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 100, 50) var imgdata = ctx.getImageData(0, 0, 100, 50); ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) ctx.putImageData(imgdata, 0, 0); @assert pixel 50,25 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.created desc: putImageData() puts image data from createImageData() onto the canvas code: | var imgdata = ctx.createImageData(100, 50); for (var i = 0; i < imgdata.data.length; i += 4) { imgdata.data[i] = 0; imgdata.data[i+1] = 255; imgdata.data[i+2] = 0; imgdata.data[i+3] = 255; } ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) ctx.putImageData(imgdata, 0, 0); @assert pixel 50,25 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.wrongtype desc: putImageData() does not accept non-ImageData objects code: | var imgdata = { width: 1, height: 1, data: [255, 0, 0, 255] }; @assert throws TypeError ctx.putImageData(imgdata, 0, 0); @assert throws TypeError ctx.putImageData("cheese", 0, 0); @assert throws TypeError ctx.putImageData(42, 0, 0); expected: green - name: 2d.imageData.put.cross desc: putImageData() accepts image data got from a different canvas canvasType: ['HTMLCanvas'] code: | var canvas2 = document.createElement('canvas'); var ctx2 = canvas2.getContext('2d'); ctx2.fillStyle = '#0f0'; ctx2.fillRect(0, 0, 100, 50) var imgdata = ctx2.getImageData(0, 0, 100, 50); ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) ctx.putImageData(imgdata, 0, 0); @assert pixel 50,25 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.cross desc: putImageData() accepts image data got from a different canvas canvasType: ['OffscreenCanvas'] code: | var offscreenCanvas2 = new OffscreenCanvas(100, 50); var ctx2 = offscreenCanvas2.getContext('2d'); ctx2.fillStyle = '#0f0'; ctx2.fillRect(0, 0, 100, 50) var imgdata = ctx2.getImageData(0, 0, 100, 50); ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) ctx.putImageData(imgdata, 0, 0); @assert pixel 50,25 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.alpha desc: putImageData() puts non-solid image data correctly code: | ctx.fillStyle = 'rgba(0, 255, 0, 0.25)'; ctx.fillRect(0, 0, 100, 50) var imgdata = ctx.getImageData(0, 0, 100, 50); ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) ctx.putImageData(imgdata, 0, 0); @assert pixel 50,25 ==~ 0,255,0,64; expected: | size 100 50 cr.set_source_rgba(0, 1, 0, 0.25) cr.rectangle(0, 0, 100, 50) cr.fill() - name: 2d.imageData.put.modified desc: putImageData() puts modified image data correctly code: | ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 100, 50) ctx.fillStyle = '#f00'; ctx.fillRect(45, 20, 10, 10) var imgdata = ctx.getImageData(45, 20, 10, 10); for (var i = 0, len = imgdata.width*imgdata.height*4; i < len; i += 4) { imgdata.data[i] = 0; imgdata.data[i+1] = 255; } ctx.putImageData(imgdata, 45, 20); @assert pixel 50,25 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.dirty.zero desc: putImageData() with zero-sized dirty rectangle puts nothing code: | ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) var imgdata = ctx.getImageData(0, 0, 100, 50); ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 100, 50) ctx.putImageData(imgdata, 0, 0, 0, 0, 0, 0); @assert pixel 50,25 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.dirty.rect1 desc: putImageData() only modifies areas inside the dirty rectangle, using width and height code: | ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 20, 20) var imgdata = ctx.getImageData(0, 0, 100, 50); ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 100, 50) ctx.fillStyle = '#f00'; ctx.fillRect(40, 20, 20, 20) ctx.putImageData(imgdata, 40, 20, 0, 0, 20, 20); @assert pixel 50,25 ==~ 0,255,0,255; @assert pixel 35,25 ==~ 0,255,0,255; @assert pixel 65,25 ==~ 0,255,0,255; @assert pixel 50,15 ==~ 0,255,0,255; @assert pixel 50,45 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.dirty.rect2 desc: putImageData() only modifies areas inside the dirty rectangle, using x and y code: | ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) ctx.fillStyle = '#0f0'; ctx.fillRect(60, 30, 20, 20) var imgdata = ctx.getImageData(0, 0, 100, 50); ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 100, 50) ctx.fillStyle = '#f00'; ctx.fillRect(40, 20, 20, 20) ctx.putImageData(imgdata, -20, -10, 60, 30, 20, 20); @assert pixel 50,25 ==~ 0,255,0,255; @assert pixel 35,25 ==~ 0,255,0,255; @assert pixel 65,25 ==~ 0,255,0,255; @assert pixel 50,15 ==~ 0,255,0,255; @assert pixel 50,45 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.dirty.negative desc: putImageData() handles negative-sized dirty rectangles correctly code: | ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 20, 20) var imgdata = ctx.getImageData(0, 0, 100, 50); ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 100, 50) ctx.fillStyle = '#f00'; ctx.fillRect(40, 20, 20, 20) ctx.putImageData(imgdata, 40, 20, 20, 20, -20, -20); @assert pixel 50,25 ==~ 0,255,0,255; @assert pixel 35,25 ==~ 0,255,0,255; @assert pixel 65,25 ==~ 0,255,0,255; @assert pixel 50,15 ==~ 0,255,0,255; @assert pixel 50,45 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.dirty.outside desc: putImageData() handles dirty rectangles outside the canvas correctly code: | ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) var imgdata = ctx.getImageData(0, 0, 100, 50); ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 100, 50) ctx.putImageData(imgdata, 100, 20, 20, 20, -20, -20); ctx.putImageData(imgdata, 200, 200, 0, 0, 100, 50); ctx.putImageData(imgdata, 40, 20, -30, -20, 30, 20); ctx.putImageData(imgdata, -30, 20, 0, 0, 30, 20); @assert pixel 50,25 ==~ 0,255,0,255; @assert pixel 98,15 ==~ 0,255,0,255; @assert pixel 98,25 ==~ 0,255,0,255; @assert pixel 98,45 ==~ 0,255,0,255; @assert pixel 1,5 ==~ 0,255,0,255; @assert pixel 1,25 ==~ 0,255,0,255; @assert pixel 1,45 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.unchanged desc: putImageData(getImageData(...), ...) has no effect code: | var i = 0; for (var y = 0; y < 16; ++y) { for (var x = 0; x < 16; ++x, ++i) { ctx.fillStyle = 'rgba(' + i + ',' + (Math.floor(i*1.5) % 256) + ',' + (Math.floor(i*23.3) % 256) + ',' + (i/256) + ')'; ctx.fillRect(x, y, 1, 1); } } var imgdata1 = ctx.getImageData(0.1, 0.2, 15.8, 15.9); var olddata = []; for (var i = 0; i < imgdata1.data.length; ++i) olddata[i] = imgdata1.data[i]; ctx.putImageData(imgdata1, 0.1, 0.2); var imgdata2 = ctx.getImageData(0.1, 0.2, 15.8, 15.9); for (var i = 0; i < imgdata2.data.length; ++i) { @assert olddata[i] === imgdata2.data[i]; } - name: 2d.imageData.put.unaffected desc: putImageData() is not affected by context state code: | ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 100, 50) var imgdata = ctx.getImageData(0, 0, 100, 50); ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) ctx.globalAlpha = 0.1; ctx.globalCompositeOperation = 'destination-atop'; ctx.shadowColor = '#f00'; ctx.shadowBlur = 1; ctx.translate(100, 50); ctx.scale(0.1, 0.1); ctx.putImageData(imgdata, 0, 0); @assert pixel 50,25 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.clip desc: putImageData() is not affected by clipping regions code: | ctx.fillStyle = '#0f0'; ctx.fillRect(0, 0, 100, 50) var imgdata = ctx.getImageData(0, 0, 100, 50); ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) ctx.beginPath(); ctx.rect(0, 0, 50, 50); ctx.clip(); ctx.putImageData(imgdata, 0, 0); @assert pixel 25,25 ==~ 0,255,0,255; @assert pixel 75,25 ==~ 0,255,0,255; expected: green - name: 2d.imageData.put.path desc: putImageData() does not affect the current path code: | ctx.fillStyle = '#f00'; ctx.fillRect(0, 0, 100, 50) ctx.rect(0, 0, 100, 50); var imgdata = ctx.getImageData(0, 0, 100, 50); ctx.putImageData(imgdata, 0, 0); ctx.fillStyle = '#0f0'; ctx.fill(); @assert pixel 50,25 ==~ 0,255,0,255; expected: green