Objek Kanvas DOM HTML
Objek Kanvas
Tag <canvas> HTML5 digunakan untuk menggambar grafik, dengan cepat, dengan JavaScript.
Akses Objek Kanvas
Anda dapat mengakses elemen <canvas> dengan menggunakan getElementById():
Contoh
var x = document.getElementById("myCanvas");
Buat Objek Kanvas
Anda dapat membuat elemen <canvas> dengan menggunakan metode document.createElement() :
Contoh
var x = document.createElement("CANVAS");
Catatan: Elemen <canvas> tidak memiliki kemampuan menggambar sendiri (ini hanya wadah untuk grafik) - Anda harus menggunakan skrip untuk benar-benar menggambar grafik.
Metode getContext() mengembalikan objek yang menyediakan metode dan properti untuk menggambar di kanvas.
Referensi ini akan mencakup properti dan metode objek getContext("2d"), yang dapat digunakan untuk menggambar teks, garis, kotak, lingkaran, dan lainnya - di kanvas.
Warna, Gaya, dan Bayangan
| Property |
Description |
| fillStyle |
Sets or returns the color, gradient, or pattern used to fill the drawing |
| strokeStyle |
Sets or returns the color, gradient, or pattern used for strokes |
| shadowColor |
Sets or returns the color to use for shadows |
| shadowBlur |
Sets or returns the blur level for shadows |
| shadowOffsetX |
Sets or returns the horizontal distance of the shadow from the shape |
| shadowOffsetY |
Sets or returns the vertical distance of the shadow from the shape |
Gaya Garis
| Property |
Description |
| lineCap |
Sets or returns the style of the end caps for a line |
| lineJoin |
Sets or returns the type of corner created, when two lines meet |
| lineWidth |
Sets or returns the current line width |
| miterLimit |
Sets or returns the maximum miter length |
persegi panjang
jalan
| Method |
Description |
| fill() |
Fills the current drawing (path) |
| stroke() |
Actually draws the path you have defined |
| beginPath() |
Begins a path, or resets the current path |
| moveTo() |
Moves the path to the specified point in the canvas, without creating a line |
| closePath() |
Creates a path from the current point back to the starting point |
| lineTo() |
Adds a new point and creates a line from that point to the last specified point in the canvas |
| clip() |
Clips a region of any shape and size from the original canvas |
| quadraticCurveTo() |
Creates a quadratic Bézier curve |
| bezierCurveTo() |
Creates a cubic Bézier curve |
| arc() |
Creates an arc/curve (used to create circles, or parts of circles) |
| arcTo() |
Creates an arc/curve between two tangents |
| isPointInPath() |
Returns true if the specified point is in the current path, otherwise false |
Transformasi
| Method |
Description |
| scale() |
Scales the current drawing bigger or smaller |
| rotate() |
Rotates the current drawing |
| translate() |
Remaps the (0,0) position on the canvas |
| transform() |
Replaces the current transformation matrix for the drawing |
| setTransform() |
Resets the current transform to the identity matrix. Then runs
transform() |
Teks
| Property |
Description |
| font |
Sets or returns the current font properties for text content |
| textAlign |
Sets or returns the current alignment for text content |
| textBaseline |
Sets or returns the current text baseline used when drawing text |
| Method |
Description |
| fillText() |
Draws "filled" text on the canvas |
| strokeText() |
Draws text on the canvas (no fill) |
| measureText() |
Returns an object that contains the width of the specified text |
Gambar Gambar
| Method |
Description |
| drawImage() |
Draws an image, canvas, or video onto the canvas |
Manipulasi Piksel
| Property |
Description |
| width |
Returns the width of an ImageData object |
| height |
Returns the height of an ImageData object |
| data |
Returns an object that contains image data of a specified ImageData object |
| Method |
Description |
| createImageData() |
Creates a new, blank ImageData object |
| getImageData() |
Returns an ImageData object that copies the pixel data for the specified rectangle on a canvas |
| putImageData() |
Puts the image data (from a specified ImageData object) back onto the canvas |
Pengomposisian
| Property |
Description |
| globalAlpha |
Sets or returns the current alpha or transparency value of the drawing |
| globalCompositeOperation |
Sets or returns how a new image are drawn onto an existing image |
Lainnya
| Method |
Description |
| save() |
Saves the state of the current context |
| restore() |
Returns previously saved path state and attributes |
| createEvent() |
|
| getContext() |
|
| toDataURL() |
|
Properti dan Acara Standar
Objek kanvas juga mendukung properti dan acara standar .
Halaman Terkait
Tutorial HTML: Kanvas HTML5
Referensi HTML: tag HTML <canvas>
