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- name: 2d.canvas.host.reference
desc: canvas refers back to its canvas
code: |
@assert ctx.canvas === canvas;
- name: 2d.canvas.host.readonly
desc: Canvas objects are readonly
code: |
var canvas2 = {{ new_canvas }};
var d = ctx.canvas;
@assert canvas2 !== d;
ctx.canvas = canvas2;
@assert ctx.canvas === d;
variants: &new-canvas-definition
- HtmlCanvas:
append_variants_to_name: false
canvas_types: ['HtmlCanvas']
new_canvas: |-
document.createElement('canvas')
OffscreenCanvas:
append_variants_to_name: false
canvas_types: ['OffscreenCanvas', 'Worker']
new_canvas: |-
new OffscreenCanvas(100, 50)
- name: 2d.canvas.host.type.delete
canvas_types: ['HtmlCanvas']
desc: window.HTMLCanvasElement interface object is [[Configurable]]
code: |
@assert delete window.HTMLCanvasElement === true;
@assert window.HTMLCanvasElement === undefined;
- name: 2d.canvas.host.type.delete
canvas_types: ['OffscreenCanvas', 'Worker']
desc: OffscreenCanvas interface object is [[Configurable]]
code: |
{% set root = 'self' if canvas_type == 'Worker' else 'window' %}
@assert delete {{ root }}.OffscreenCanvas === true;
@assert {{ root }}.OffscreenCanvas === undefined;
- name: 2d.canvas.host.type.name
canvas_types: ['HtmlCanvas']
desc: HTMLCanvasElement type and toString
code: |
@assert Object.prototype.toString.call(canvas) === '[object HTMLCanvasElement]';
- name: 2d.canvas.host.type.name
canvas_types: ['OffscreenCanvas', 'Worker']
desc: OffscreenCanvas type and toString
code: |
@assert Object.prototype.toString.call(canvas) === '[object OffscreenCanvas]';
- name: 2d.canvas.context.exists
desc: The 2D context is implemented
code: |
@assert canvas.getContext('2d') !== null;
- name: 2d.canvas.context.extraargs.create
desc: The 2D context doesn't throw with extra getContext arguments (new context)
code: |
@assert {{ new_canvas }}.getContext('2d', false, {}, [], 1, "2") !== null;
@assert {{ new_canvas }}.getContext('2d', 123) !== null;
@assert {{ new_canvas }}.getContext('2d', "test") !== null;
@assert {{ new_canvas }}.getContext('2d', undefined) !== null;
@assert {{ new_canvas }}.getContext('2d', null) !== null;
@assert {{ new_canvas }}.getContext('2d', Symbol.hasInstance) !== null;
variants: *new-canvas-definition
- name: 2d.canvas.context.invalid.args
desc: Calling getContext with invalid arguments.
canvas_types: ['HtmlCanvas']
code: |
@assert canvas.getContext('') === null;
@assert canvas.getContext('2d#') === null;
@assert canvas.getContext('This is clearly not a valid context name.') === null;
@assert canvas.getContext('2d\0') === null;
@assert canvas.getContext('2\uFF44') === null;
@assert canvas.getContext('2D') === null;
@assert throws TypeError canvas.getContext();
@assert canvas.getContext('null') === null;
@assert canvas.getContext('undefined') === null;
- name: 2d.canvas.context.invalid.args
desc: Calling getContext with invalid arguments.
canvas_types: ['OffscreenCanvas', 'Worker']
code: |
@assert throws TypeError canvas.getContext('');
@assert throws TypeError canvas.getContext('This is not an implemented context in any real browser');
@assert throws TypeError canvas.getContext('2d#');
@assert throws TypeError canvas.getContext('2d\0');
@assert throws TypeError canvas.getContext('2\uFF44');
@assert throws TypeError canvas.getContext('2D');
@assert throws TypeError canvas.getContext();
@assert throws TypeError canvas.getContext('null');
@assert throws TypeError canvas.getContext('undefined');
- name: 2d.canvas.context.extraargs.cache
desc: The 2D context doesn't throw with extra getContext arguments (cached)
code: |
@assert canvas.getContext('2d', false, {}, [], 1, '2') !== null;
@assert canvas.getContext('2d', 123) !== null;
@assert canvas.getContext('2d', 'test') !== null;
@assert canvas.getContext('2d', undefined) !== null;
@assert canvas.getContext('2d', null) !== null;
@assert canvas.getContext('2d', Symbol.hasInstance) !== null;
- name: 2d.canvas.context.unique
desc: getContext('2d') returns the same object
code: |
@assert canvas.getContext('2d') === canvas.getContext('2d');
- name: 2d.canvas.context.shared
desc: getContext('2d') returns objects which share canvas state
code: |
var ctx2 = canvas.getContext('2d');
ctx.fillStyle = '#f00';
ctx2.fillStyle = '#0f0';
ctx.fillRect(0, 0, 100, 50);
@assert pixel 50,25 == 0,255,0,255;
expected: green
- name: 2d.canvas.host.initial.color
desc: Initial state is transparent black
code: |
@assert pixel 20,20 == 0,0,0,0;
- name: 2d.canvas.host.initial.reset.different
desc: Changing size resets canvas to transparent black
code: |
ctx.fillStyle = '#f00';
ctx.fillRect(0, 0, 50, 50);
@assert pixel 20,20 == 255,0,0,255;
canvas.width = 50;
@assert pixel 20,20 == 0,0,0,0;
- name: 2d.canvas.host.initial.reset.same
desc: Setting size (not changing the value) resets canvas to transparent black
code: |
canvas.width = 100;
ctx.fillStyle = '#f00';
ctx.fillRect(0, 0, 50, 50);
@assert pixel 20,20 == 255,0,0,255;
canvas.width = 100;
@assert pixel 20,20 == 0,0,0,0;
- name: 2d.canvas.host.initial.reset.path
desc: Resetting the canvas state resets the current path
code: |
canvas.width = 100;
ctx.rect(0, 0, 100, 50);
canvas.width = 100;
ctx.fillStyle = '#f00';
ctx.fill();
@assert pixel 20,20 == 0,0,0,0;
- name: 2d.canvas.host.initial.reset.clip
desc: Resetting the canvas state resets the current clip region
code: |
canvas.width = 100;
ctx.rect(0, 0, 1, 1);
ctx.clip();
canvas.width = 100;
ctx.fillStyle = '#0f0';
ctx.fillRect(0, 0, 100, 50);
@assert pixel 20,20 == 0,255,0,255;
- name: 2d.canvas.host.initial.reset.transform
desc: Resetting the canvas state resets the current transformation matrix
code: |
canvas.width = 100;
ctx.scale(0.1, 0.1);
canvas.width = 100;
ctx.fillStyle = '#0f0';
ctx.fillRect(0, 0, 100, 50);
@assert pixel 20,20 == 0,255,0,255;
- name: 2d.canvas.host.initial.reset.gradient
desc: Resetting the canvas state does not invalidate any existing gradients
code: |
canvas.width = 50;
var g = ctx.createLinearGradient(0, 0, 100, 0);
g.addColorStop(0, '#0f0');
g.addColorStop(1, '#0f0');
canvas.width = 100;
ctx.fillStyle = '#f00';
ctx.fillRect(0, 0, 100, 50);
ctx.fillStyle = g;
ctx.fillRect(0, 0, 100, 50);
@assert pixel 50,25 == 0,255,0,255;
- name: 2d.canvas.host.initial.reset.pattern
desc: Resetting the canvas state does not invalidate any existing patterns
code: |
canvas.width = 30;
ctx.fillStyle = '#0f0';
ctx.fillRect(0, 0, 30, 50);
var p = ctx.createPattern(canvas, 'repeat-x');
canvas.width = 100;
ctx.fillStyle = '#f00';
ctx.fillRect(0, 0, 100, 50);
ctx.fillStyle = p;
ctx.fillRect(0, 0, 100, 50);
@assert pixel 50,25 == 0,255,0,255;
- name: 2d.canvas.host.size.attributes.idl.set.zero
desc: Setting width/height IDL attributes to 0
code: |
canvas.width = 0;
canvas.height = 0;
@assert canvas.width === 0;
@assert canvas.height === 0;
- name: 2d.canvas.host.size.attributes.idl
desc: Getting/setting width/height IDL attributes
code: |
canvas.width = '100';
canvas.height = '100';
@assert canvas.width === 100;
@assert canvas.height === 100;
canvas.width = 301.999;
canvas.height = 301.001;
@assert canvas.width === 301;
@assert canvas.height === 301;
canvas.width = "+1.5e2";
canvas.height = "0x96";
@assert canvas.width === 150;
@assert canvas.height === 150;
- name: 2d.canvas.host.size.invalid.attributes.idl
canvas_types: ['OffscreenCanvas', 'Worker']
desc: Getting/setting width/height IDL attributes
code: |
@assert throws TypeError canvas.width = 200 - Math.pow(2, 32);
@assert throws TypeError canvas.height = 200 - Math.pow(2, 32);
@assert throws TypeError canvas.width = '400x';
@assert throws TypeError canvas.height = 'foo';
- name: 2d.canvas.host.size.invalid.attributes.idl
canvas_types: ['HtmlCanvas']
desc: Getting/setting width/height IDL attributes
code: |
canvas.width = 200 - Math.pow(2, 32);
canvas.height = 200 - Math.pow(2, 32);
@assert canvas.width === 200;
@assert canvas.height === 200;
canvas.width = '400x';
canvas.height = 'foo';
@assert canvas.width === 0;
@assert canvas.height === 0;
- name: 2d.canvas.host.size.attributes.default
desc: Default width/height when attributes are missing
code: |
@assert canvas.width === 100;
@assert canvas.height === 50;
- name: 2d.canvas.host.size.attributes.removed
size: [120, 50]
canvas_types: ['HtmlCanvas']
desc: Removing content attributes reverts to default size
code: |
@assert canvas.width === 120;
canvas.removeAttribute('width');
@assert canvas.width === 300;
- name: 2d.canvas.host.size.attributes.reflect.setidl
desc: Setting IDL attributes updates IDL and content attributes
code: |
canvas.width = 120;
canvas.height = 60;
@assert canvas.width === 120;
@assert canvas.height === 60;
{% if canvas_type == 'HtmlCanvas' %}
@assert canvas.getAttribute('width') === '120';
@assert canvas.getAttribute('height') === '60';
{% endif %}
- name: 2d.canvas.host.size.attributes.reflect.setidlzero
desc: Setting IDL attributes to 0 updates IDL and content attributes
code: |
canvas.width = 0;
canvas.height = 0;
{% if canvas_type == 'HtmlCanvas' %}
_assertSame(canvas.getAttribute('width'), '0', "canvas.getAttribute('width')", "'0'");
_assertSame(canvas.getAttribute('height'), '0', "canvas.getAttribute('height')", "'0'");
{% endif %}
@assert canvas.width === 0;
@assert canvas.height === 0;
- name: 2d.canvas.host.size.attributes.reflect.setcontent
canvas_types: ['HtmlCanvas']
desc: Setting content attributes updates IDL and content attributes
code: |
canvas.setAttribute('width', '120');
canvas.setAttribute('height', '60');
@assert canvas.getAttribute('width') === '120';
@assert canvas.getAttribute('height') === '60';
@assert canvas.width === 120;
@assert canvas.height === 60;
- name: 2d.canvas.host.size.large
notes: Not sure how reasonable this is, but the spec doesn't say there's an upper
limit on the size.
code: |
var n = 2147483647; // 2^31 - 1, which should be supported by any sensible definition of "long"
canvas.width = n;
canvas.height = n;
@assert canvas.width === n;
@assert canvas.height === n;
- name: 2d.canvas.context.prototype
desc: checks CanvasRenderingContext2D prototype
canvas_types: ['HtmlCanvas']
code: |
@assert Object.getPrototypeOf(CanvasRenderingContext2D.prototype) === Object.prototype;
@assert Object.getPrototypeOf(ctx) === CanvasRenderingContext2D.prototype;
- name: 2d.canvas.context.prototype
desc: checks OffscreenCanvasRenderingContext2D prototype
canvas_types: ['OffscreenCanvas', 'Worker']
code: |
@assert Object.getPrototypeOf(OffscreenCanvasRenderingContext2D.prototype) === Object.prototype;
@assert Object.getPrototypeOf(ctx) === OffscreenCanvasRenderingContext2D.prototype;
- name: 2d.canvas.host.scaled
desc: CSS-scaled canvases get drawn correctly
canvas_types: ['HtmlCanvas']
size: [50, 25]
canvas: 'style="width: 100px; height: 50px"'
manual:
code: |
ctx.fillStyle = '#00f';
ctx.fillRect(0, 0, 50, 25);
ctx.fillStyle = '#0ff';
ctx.fillRect(0, 0, 25, 10);
expected: |
size 100 50
cr.set_source_rgb(0, 0, 1)
cr.rectangle(0, 0, 100, 50)
cr.fill()
cr.set_source_rgb(0, 1, 1)
cr.rectangle(0, 0, 50, 20)
cr.fill()
- name: 2d.canvas.context.type.exists
desc: The 2D context interface is a property of '{{ root }}'
notes: &bindings Defined in "Web IDL" (draft)
code: |
@assert {{ root }}.{{ context_object }};
variants: &get-context-definition
- HtmlCanvas:
append_variants_to_name: false
canvas_types: ['HtmlCanvas']
root: window
context_object: CanvasRenderingContext2D
OffscreenCanvas:
append_variants_to_name: false
canvas_types: ['OffscreenCanvas']
root: window
context_object: OffscreenCanvasRenderingContext2D
Worker:
append_variants_to_name: false
canvas_types: ['Worker']
root: self
context_object: OffscreenCanvasRenderingContext2D
- name: 2d.canvas.context.type.extend
desc: Interface methods can be added
notes: *bindings
code: |
{{ root }}.{{ context_object }}.prototype.fillRectGreen = function (x, y, w, h)
{
this.fillStyle = '#0f0';
this.fillRect(x, y, w, h);
};
ctx.fillStyle = '#f00';
ctx.fillRectGreen(0, 0, 100, 50);
@assert pixel 50,25 == 0,255,0,255;
expected: green
variants: *get-context-definition
- name: 2d.canvas.context.type.replace
desc: Interface methods can be overridden
notes: *bindings
code: |
var fillRect = {{ root }}.{{ context_object }}.prototype.fillRect;
{{ root }}.{{ context_object }}.prototype.fillRect = function (x, y, w, h)
{
this.fillStyle = '#0f0';
fillRect.call(this, x, y, w, h);
};
ctx.fillStyle = '#f00';
ctx.fillRect(0, 0, 100, 50);
@assert pixel 50,25 == 0,255,0,255;
expected: green
variants: *get-context-definition
- name: 2d.canvas.context.type.prototype
desc: window.CanvasRenderingContext2D.prototype are not [[Writable]] and not [[Configurable]],
and its methods are [[Configurable]].
notes: *bindings
code: |
@assert {{ root }}.{{ context_object }}.prototype;
@assert {{ root }}.{{ context_object }}.prototype.fill;
{{ root }}.{{ context_object }}.prototype = null;
@assert {{ root }}.{{ context_object }}.prototype;
delete {{ root }}.{{ context_object }}.prototype;
@assert {{ root }}.{{ context_object }}.prototype;
{{ root }}.{{ context_object }}.prototype.fill = 1;
@assert {{ root }}.{{ context_object }}.prototype.fill === 1;
delete {{ root }}.{{ context_object }}.prototype.fill;
@assert {{ root }}.{{ context_object }}.prototype.fill === undefined;
variants: *get-context-definition