chromium/src/third_party/blink/web_tests/external/wpt/html/canvas/tools/yaml/offscreen/pixel-manipulation.yaml

- name: 2d.imageData.create2.basic
  desc: createImageData(sw, sh) exists and returns something
  testing:
  - 2d.imageData.create2.object
  code: |
    @assert ctx.createImageData(1, 1) !== null;
    t.done();

- name: 2d.imageData.create1.basic
  desc: createImageData(imgdata) exists and returns something
  testing:
  - 2d.imageData.create1.object
  code: |
    @assert ctx.createImageData(ctx.createImageData(1, 1)) !== null;
    t.done();

- name: 2d.imageData.create2.initial
  desc: createImageData(sw, sh) returns transparent black data of the right size
  testing:
  - 2d.imageData.create2.size
  - 2d.imageData.create.initial
  - 2d.imageData.initial
  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;
    t.done();

- name: 2d.imageData.create1.initial
  desc: createImageData(imgdata) returns transparent black data of the right size
  testing:
  - 2d.imageData.create1.size
  - 2d.imageData.create.initial
  - 2d.imageData.initial
  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;
    t.done();

- name: 2d.imageData.create2.large
  desc: createImageData(sw, sh) works for sizes much larger than the canvas
  testing:
  - 2d.imageData.create2.size
  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;
    t.done();

- name: 2d.imageData.create2.negative
  desc: createImageData(sw, sh) takes the absolute magnitude of the size arguments
  testing:
  - 2d.imageData.create2.size
  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;
    t.done();

- name: 2d.imageData.create2.zero
  desc: createImageData(sw, sh) throws INDEX_SIZE_ERR if size is zero
  testing:
  - 2d.imageData.getcreate.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);
    t.done();

- name: 2d.imageData.create2.nonfinite
  desc: createImageData() throws TypeError if arguments are not finite
  testing:
  - 2d.imageData.getcreate.nonfinite
  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>);
    t.done();

- name: 2d.imageData.create1.zero
  desc: createImageData(null) throws TypeError
  testing:
  - 2d.imageData.create.null
  code: |
    @assert throws TypeError ctx.createImageData(null);
    t.done();

- name: 2d.imageData.create2.round
  desc: createImageData(w, h) is rounded the same as getImageData(0, 0, w, h)
  testing:
  - 2d.imageData.createround
  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;
    t.done();

- name: 2d.imageData.get.basic
  desc: getImageData() exists and returns something
  testing:
  - 2d.imageData.get.basic
  code: |
    @assert ctx.getImageData(0, 0, 100, 50) !== null;
    t.done();

- name: 2d.imageData.get.zero
  desc: getImageData() throws INDEX_SIZE_ERR if size is zero
  testing:
  - 2d.imageData.getcreate.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);
    t.done();

- name: 2d.imageData.get.nonfinite
  desc: getImageData() throws TypeError if arguments are not finite
  testing:
  - 2d.imageData.getcreate.nonfinite
  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>);
    t.done();

- name: 2d.imageData.get.source.outside
  desc: getImageData() returns transparent black outside the canvas
  testing:
  - 2d.imageData.get.basic
  - 2d.imageData.get.outside
  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;
    t.done();

- name: 2d.imageData.get.source.negative
  desc: getImageData() works with negative width and height, and returns top-to-bottom
    left-to-right
  testing:
  - 2d.imageData.get.basic
  - 2d.pixelarray.order
  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;
    t.done();

- name: 2d.imageData.get.source.size
  desc: getImageData() returns bigger ImageData for bigger source rectangle
  testing:
  - 2d.imageData.get.basic
  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;
    t.done();

- name: 2d.imageData.get.tiny
  desc: getImageData() works for sizes smaller than one pixel
  testing:
  - 2d.imageData.one
  code: |
    var imgdata = ctx.getImageData(0, 0, 0.0001, 0.0001);
    @assert imgdata.data.length === imgdata.width*imgdata.height*4;
    @assert imgdata.width === 1;
    @assert imgdata.height === 1;
    t.done();

- name: 2d.imageData.get.nonpremul
  desc: getImageData() returns non-premultiplied colours
  testing:
  - 2d.imageData.get.premul
  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;
    t.done();

- name: 2d.imageData.get.range
  desc: getImageData() returns values in the range [0, 255]
  testing:
  - 2d.pixelarray.range
  - 2d.pixelarray.retrieve
  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;
    t.done();

- name: 2d.imageData.get.clamp
  desc: getImageData() clamps colours to the range [0, 255]
  testing:
  - 2d.pixelarray.range
  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;
    t.done();

- name: 2d.imageData.get.length
  desc: getImageData() returns a correctly-sized Uint8ClampedArray
  testing:
  - 2d.pixelarray.length
  code: |
    var imgdata = ctx.getImageData(0, 0, 10, 10);
    @assert imgdata.data.length === imgdata.width*imgdata.height*4;
    t.done();

- name: 2d.imageData.get.order.cols
  desc: getImageData() returns leftmost columns first
  testing:
  - 2d.pixelarray.order
  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;
    t.done();

- name: 2d.imageData.get.order.rows
  desc: getImageData() returns topmost rows first
  testing:
  - 2d.pixelarray.order
  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;
    t.done();

- name: 2d.imageData.get.order.rgb
  desc: getImageData() returns R then G then B
  testing:
  - 2d.pixelarray.order
  - 2d.pixelarray.indexes
  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;
    t.done();

- name: 2d.imageData.get.order.alpha
  desc: getImageData() returns A in the fourth component
  testing:
  - 2d.pixelarray.order
  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;
    t.done();

- name: 2d.imageData.get.unaffected
  desc: getImageData() is not affected by context state
  testing:
  - 2d.imageData.unaffected
  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;
    t.done();


- name: 2d.imageData.object.properties
  desc: ImageData objects have the right properties
  testing:
  - 2d.imageData.type
  code: |
    var imgdata = ctx.getImageData(0, 0, 10, 10);
    @assert typeof(imgdata.width) === 'number';
    @assert typeof(imgdata.height) === 'number';
    @assert typeof(imgdata.data) === 'object';
    t.done();

- name: 2d.imageData.object.readonly
  desc: ImageData objects properties are read-only
  testing:
  - 2d.imageData.type
  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;
    t.done();

- name: 2d.imageData.object.set
  desc: ImageData.data can be modified
  testing:
  - 2d.pixelarray.modify
  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;
    t.done();

- name: 2d.imageData.object.undefined
  desc: ImageData.data converts undefined to 0
  testing:
  - 2d.pixelarray.modify
  code: |
    var imgdata = ctx.getImageData(0, 0, 10, 10);
    imgdata.data[0] = 100;
    imgdata.data[0] = undefined;
    @assert imgdata.data[0] === 0;
    t.done();

- name: 2d.imageData.object.nan
  desc: ImageData.data converts NaN to 0
  testing:
  - 2d.pixelarray.modify
  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;
    t.done();

- name: 2d.imageData.object.string
  desc: ImageData.data converts strings to numbers with ToNumber
  testing:
  - 2d.pixelarray.modify
  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;
    t.done();

- name: 2d.imageData.object.clamp
  desc: ImageData.data clamps numbers to [0, 255]
  testing:
  - 2d.pixelarray.modify
  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;
    t.done();

- name: 2d.imageData.object.round
  desc: ImageData.data rounds numbers with round-to-zero
  testing:
  - 2d.pixelarray.modify
  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;
    t.done();

- name: 2d.imageData.put.null
  desc: putImageData() with null imagedata throws TypeError
  testing:
  - 2d.imageData.put.wrongtype
  code: |
    @assert throws TypeError ctx.putImageData(null, 0, 0);
    t.done();

- name: 2d.imageData.put.nonfinite
  desc: putImageData() throws TypeError if arguments are not finite
  testing:
  - 2d.imageData.put.nonfinite
  code: |
    var imgdata = ctx.getImageData(0, 0, 10, 10);
    @nonfinite @assert throws TypeError ctx.putImageData(<imgdata>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>);
    @nonfinite @assert throws TypeError ctx.putImageData(<imgdata>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>, <10 Infinity -Infinity NaN>);
    t.done();

- name: 2d.imageData.put.basic
  desc: putImageData() puts image data from getImageData() onto the canvas
  testing:
  - 2d.imageData.put.normal
  - 2d.imageData.put.3arg
  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;
    t.done();

- name: 2d.imageData.put.created
  desc: putImageData() puts image data from createImageData() onto the canvas
  testing:
  - 2d.imageData.put.normal
  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;
    t.done();

- name: 2d.imageData.put.wrongtype
  desc: putImageData() does not accept non-ImageData objects
  testing:
  - 2d.imageData.put.wrongtype
  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);
    t.done();

- name: 2d.imageData.put.cross
  desc: putImageData() accepts image data got from a different canvas
  testing:
  - 2d.imageData.put.normal
  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;
    t.done();

- name: 2d.imageData.put.alpha
  desc: putImageData() puts non-solid image data correctly
  testing:
  - 2d.imageData.put.normal
  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;
    t.done();

- name: 2d.imageData.put.modified
  desc: putImageData() puts modified image data correctly
  testing:
  - 2d.imageData.put.normal
  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;
    t.done();

- name: 2d.imageData.put.dirty.zero
  desc: putImageData() with zero-sized dirty rectangle puts nothing
  testing:
  - 2d.imageData.put.normal
  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;
    t.done();

- name: 2d.imageData.put.dirty.rect1
  desc: putImageData() only modifies areas inside the dirty rectangle, using width
    and height
  testing:
  - 2d.imageData.put.normal
  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;
    t.done();

- name: 2d.imageData.put.dirty.rect2
  desc: putImageData() only modifies areas inside the dirty rectangle, using x and
    y
  testing:
  - 2d.imageData.put.normal
  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;
    t.done();

- name: 2d.imageData.put.dirty.negative
  desc: putImageData() handles negative-sized dirty rectangles correctly
  testing:
  - 2d.imageData.put.normal
  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;
    t.done();

- name: 2d.imageData.put.dirty.outside
  desc: putImageData() handles dirty rectangles outside the canvas correctly
  testing:
  - 2d.imageData.put.normal
  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;
    t.done();

- name: 2d.imageData.put.unchanged
  desc: putImageData(getImageData(...), ...) has no effect
  testing:
  - 2d.imageData.unchanged
  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];
    }
    t.done();

- name: 2d.imageData.put.unaffected
  desc: putImageData() is not affected by context state
  testing:
  - 2d.imageData.unaffected
  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;
    t.done();

- name: 2d.imageData.put.clip
  desc: putImageData() is not affected by clipping regions
  testing:
  - 2d.imageData.unaffected
  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;
    t.done();

- name: 2d.imageData.put.path
  desc: putImageData() does not affect the current path
  testing:
  - 2d.imageData.put.normal
  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;
    t.done();