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update: H5 高清canvas canvasToTempFilePath模糊问题.
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328 changes: 164 additions & 164 deletions
328
src/core/view/components/canvas/hidpi.js → src/core/helpers/hidpi.js
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,168 +1,168 @@ | ||
const pixelRatio = (function () { | ||
const canvas = document.createElement('canvas') | ||
const context = canvas.getContext('2d') | ||
const backingStore = context.backingStorePixelRatio || | ||
context.webkitBackingStorePixelRatio || | ||
context.mozBackingStorePixelRatio || | ||
context.msBackingStorePixelRatio || | ||
context.oBackingStorePixelRatio || | ||
context.backingStorePixelRatio || 1 | ||
return (window.devicePixelRatio || 1) / backingStore | ||
})() | ||
|
||
const forEach = function (obj, func) { | ||
for (let key in obj) { | ||
if (obj.hasOwnProperty(key)) { | ||
func(obj[key], key) | ||
} | ||
} | ||
} | ||
const ratioArgs = { | ||
'fillRect': 'all', | ||
'clearRect': 'all', | ||
'strokeRect': 'all', | ||
'moveTo': 'all', | ||
'lineTo': 'all', | ||
'arc': [0, 1, 2], | ||
'arcTo': 'all', | ||
'bezierCurveTo': 'all', | ||
'isPointinPath': 'all', | ||
'isPointinStroke': 'all', | ||
'quadraticCurveTo': 'all', | ||
'rect': 'all', | ||
'translate': 'all', | ||
'createRadialGradient': 'all', | ||
'createLinearGradient': 'all', | ||
'setTransform': [4, 5] | ||
} | ||
if (pixelRatio !== 1) { | ||
const proto = CanvasRenderingContext2D.prototype | ||
|
||
forEach(ratioArgs, function (value, key) { | ||
proto[key] = (function (_super) { | ||
return function () { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
|
||
let args = Array.prototype.slice.call(arguments) | ||
|
||
if (value === 'all') { | ||
args = args.map(function (a) { | ||
return a * pixelRatio | ||
}) | ||
} else if (Array.isArray(value)) { | ||
for (let i = 0; i < value.length; i++) { | ||
args[value[i]] *= pixelRatio | ||
} | ||
} | ||
return _super.apply(this, args) | ||
} | ||
})(proto[key]) | ||
}) | ||
|
||
proto.stroke = (function (_super) { | ||
return function () { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
this.lineWidth *= pixelRatio | ||
_super.apply(this, arguments) | ||
this.lineWidth /= pixelRatio | ||
} | ||
})(proto.stroke) | ||
|
||
proto.fillText = (function (_super) { | ||
return function () { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
const args = Array.prototype.slice.call(arguments) | ||
|
||
args[1] *= pixelRatio | ||
args[2] *= pixelRatio | ||
|
||
this.font = this.font.replace( | ||
/(\d+)(px|em|rem|pt)/g, | ||
function (w, m, u) { | ||
return (m * pixelRatio) + u | ||
} | ||
) | ||
|
||
_super.apply(this, args) | ||
|
||
this.font = this.font.replace( | ||
/(\d+)(px|em|rem|pt)/g, | ||
function (w, m, u) { | ||
return (m / pixelRatio) + u | ||
} | ||
) | ||
} | ||
})(proto.fillText) | ||
|
||
proto.strokeText = (function (_super) { | ||
return function () { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
var args = Array.prototype.slice.call(arguments) | ||
|
||
args[1] *= pixelRatio // x | ||
args[2] *= pixelRatio // y | ||
|
||
this.font = this.font.replace( | ||
/(\d+)(px|em|rem|pt)/g, | ||
function (w, m, u) { | ||
return (m * pixelRatio) + u | ||
} | ||
) | ||
|
||
_super.apply(this, args) | ||
|
||
this.font = this.font.replace( | ||
/(\d+)(px|em|rem|pt)/g, | ||
function (w, m, u) { | ||
return (m / pixelRatio) + u | ||
} | ||
) | ||
} | ||
})(proto.strokeText) | ||
|
||
proto.drawImageByCanvas = (function (_super) { | ||
return function (canvas, srcx, srcy, srcw, srch, desx, desy, desw, desh, isScale) { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
srcx *= pixelRatio | ||
srcy *= pixelRatio | ||
srcw *= pixelRatio | ||
srch *= pixelRatio | ||
desx *= pixelRatio | ||
desy *= pixelRatio | ||
desw = isScale ? desw * pixelRatio : desw | ||
desh = isScale ? desh * pixelRatio : desh | ||
_super.call(this, canvas, srcx, srcy, srcw, srch, desx, desy, desw, desh) | ||
} | ||
})(proto.drawImage) | ||
|
||
proto.drawImage = (function (_super) { | ||
return function () { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
this.scale(pixelRatio, pixelRatio) | ||
_super.apply(this, arguments) | ||
this.scale(1 / pixelRatio, 1 / pixelRatio) | ||
} | ||
})(proto.drawImage) | ||
} | ||
|
||
export function wrapper (canvas) { | ||
canvas.style.height = canvas.height + 'px' | ||
canvas.style.width = canvas.width + 'px' | ||
canvas.width *= pixelRatio | ||
const pixelRatio = (function () { | ||
const canvas = document.createElement('canvas') | ||
const context = canvas.getContext('2d') | ||
const backingStore = context.backingStorePixelRatio || | ||
context.webkitBackingStorePixelRatio || | ||
context.mozBackingStorePixelRatio || | ||
context.msBackingStorePixelRatio || | ||
context.oBackingStorePixelRatio || | ||
context.backingStorePixelRatio || 1 | ||
return (window.devicePixelRatio || 1) / backingStore | ||
})() | ||
|
||
const forEach = function (obj, func) { | ||
for (let key in obj) { | ||
if (obj.hasOwnProperty(key)) { | ||
func(obj[key], key) | ||
} | ||
} | ||
} | ||
const ratioArgs = { | ||
'fillRect': 'all', | ||
'clearRect': 'all', | ||
'strokeRect': 'all', | ||
'moveTo': 'all', | ||
'lineTo': 'all', | ||
'arc': [0, 1, 2], | ||
'arcTo': 'all', | ||
'bezierCurveTo': 'all', | ||
'isPointinPath': 'all', | ||
'isPointinStroke': 'all', | ||
'quadraticCurveTo': 'all', | ||
'rect': 'all', | ||
'translate': 'all', | ||
'createRadialGradient': 'all', | ||
'createLinearGradient': 'all', | ||
'setTransform': [4, 5] | ||
} | ||
if (pixelRatio !== 1) { | ||
const proto = CanvasRenderingContext2D.prototype | ||
|
||
forEach(ratioArgs, function (value, key) { | ||
proto[key] = (function (_super) { | ||
return function () { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
|
||
let args = Array.prototype.slice.call(arguments) | ||
|
||
if (value === 'all') { | ||
args = args.map(function (a) { | ||
return a * pixelRatio | ||
}) | ||
} else if (Array.isArray(value)) { | ||
for (let i = 0; i < value.length; i++) { | ||
args[value[i]] *= pixelRatio | ||
} | ||
} | ||
return _super.apply(this, args) | ||
} | ||
})(proto[key]) | ||
}) | ||
|
||
proto.stroke = (function (_super) { | ||
return function () { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
this.lineWidth *= pixelRatio | ||
_super.apply(this, arguments) | ||
this.lineWidth /= pixelRatio | ||
} | ||
})(proto.stroke) | ||
|
||
proto.fillText = (function (_super) { | ||
return function () { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
const args = Array.prototype.slice.call(arguments) | ||
|
||
args[1] *= pixelRatio | ||
args[2] *= pixelRatio | ||
|
||
this.font = this.font.replace( | ||
/(\d+)(px|em|rem|pt)/g, | ||
function (w, m, u) { | ||
return (m * pixelRatio) + u | ||
} | ||
) | ||
|
||
_super.apply(this, args) | ||
|
||
this.font = this.font.replace( | ||
/(\d+)(px|em|rem|pt)/g, | ||
function (w, m, u) { | ||
return (m / pixelRatio) + u | ||
} | ||
) | ||
} | ||
})(proto.fillText) | ||
|
||
proto.strokeText = (function (_super) { | ||
return function () { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
var args = Array.prototype.slice.call(arguments) | ||
|
||
args[1] *= pixelRatio // x | ||
args[2] *= pixelRatio // y | ||
|
||
this.font = this.font.replace( | ||
/(\d+)(px|em|rem|pt)/g, | ||
function (w, m, u) { | ||
return (m * pixelRatio) + u | ||
} | ||
) | ||
|
||
_super.apply(this, args) | ||
|
||
this.font = this.font.replace( | ||
/(\d+)(px|em|rem|pt)/g, | ||
function (w, m, u) { | ||
return (m / pixelRatio) + u | ||
} | ||
) | ||
} | ||
})(proto.strokeText) | ||
|
||
proto.drawImageByCanvas = (function (_super) { | ||
return function (canvas, srcx, srcy, srcw, srch, desx, desy, desw, desh, isScale) { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
srcx *= pixelRatio | ||
srcy *= pixelRatio | ||
srcw *= pixelRatio | ||
srch *= pixelRatio | ||
desx *= pixelRatio | ||
desy *= pixelRatio | ||
desw = isScale ? desw * pixelRatio : desw | ||
desh = isScale ? desh * pixelRatio : desh | ||
_super.call(this, canvas, srcx, srcy, srcw, srch, desx, desy, desw, desh) | ||
} | ||
})(proto.drawImage) | ||
|
||
proto.drawImage = (function (_super) { | ||
return function () { | ||
if (this.__ignore__) { | ||
return _super.apply(this, arguments) | ||
} | ||
this.scale(pixelRatio, pixelRatio) | ||
_super.apply(this, arguments) | ||
this.scale(1 / pixelRatio, 1 / pixelRatio) | ||
} | ||
})(proto.drawImage) | ||
} | ||
|
||
export function wrapper (canvas) { | ||
canvas.style.height = canvas.height + 'px' | ||
canvas.style.width = canvas.width + 'px' | ||
canvas.width *= pixelRatio | ||
canvas.height *= pixelRatio | ||
|
||
console.log(canvas.width) | ||
console.log(canvas.height) | ||
console.log(canvas.height) | ||
} |
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