import Plane from './Plane';
const DEFAULT_BORDER_SIZE = 10;
/**
* The NineSlicePlane allows you to stretch a texture using 9-slice scaling. The corners will remain unscaled (useful
* for buttons with rounded corners for example) and the other areas will be scaled horizontally and or vertically
*
*```js
* let Plane9 = new PIXI.NineSlicePlane(PIXI.Texture.fromImage('BoxWithRoundedCorners.png'), 15, 15, 15, 15);
* ```
* <pre>
* A B
* +---+----------------------+---+
* C | 1 | 2 | 3 |
* +---+----------------------+---+
* | | | |
* | 4 | 5 | 6 |
* | | | |
* +---+----------------------+---+
* D | 7 | 8 | 9 |
* +---+----------------------+---+
* When changing this objects width and/or height:
* areas 1 3 7 and 9 will remain unscaled.
* areas 2 and 8 will be stretched horizontally
* areas 4 and 6 will be stretched vertically
* area 5 will be stretched both horizontally and vertically
* </pre>
*
* @class
* @extends PIXI.Plane
* @memberof PIXI
*
*/
export default class NineSlicePlane extends Plane
{
/**
* @param {PIXI.Texture} texture - The texture to use on the NineSlicePlane.
* @param {int} [leftWidth=10] size of the left vertical bar (A)
* @param {int} [topHeight=10] size of the top horizontal bar (C)
* @param {int} [rightWidth=10] size of the right vertical bar (B)
* @param {int} [bottomHeight=10] size of the bottom horizontal bar (D)
*/
constructor(texture, leftWidth, topHeight, rightWidth, bottomHeight)
{
super(texture, 4, 4);
this._origWidth = texture.orig.width;
this._origHeight = texture.orig.height;
/**
* The width of the NineSlicePlane, setting this will actually modify the vertices and UV's of this plane
*
* @member {number}
* @memberof PIXI.NineSlicePlane#
* @override
*/
this._width = this._origWidth;
/**
* The height of the NineSlicePlane, setting this will actually modify the vertices and UV's of this plane
*
* @member {number}
* @memberof PIXI.NineSlicePlane#
* @override
*/
this._height = this._origHeight;
/**
* The width of the left column (a)
*
* @member {number}
* @memberof PIXI.NineSlicePlane#
* @override
*/
this.leftWidth = typeof leftWidth !== 'undefined' ? leftWidth : DEFAULT_BORDER_SIZE;
/**
* The width of the right column (b)
*
* @member {number}
* @memberof PIXI.NineSlicePlane#
* @override
*/
this.rightWidth = typeof rightWidth !== 'undefined' ? rightWidth : DEFAULT_BORDER_SIZE;
/**
* The height of the top row (c)
*
* @member {number}
* @memberof PIXI.NineSlicePlane#
* @override
*/
this.topHeight = typeof topHeight !== 'undefined' ? topHeight : DEFAULT_BORDER_SIZE;
/**
* The height of the bottom row (d)
*
* @member {number}
* @memberof PIXI.NineSlicePlane#
* @override
*/
this.bottomHeight = typeof bottomHeight !== 'undefined' ? bottomHeight : DEFAULT_BORDER_SIZE;
this.refresh(true);
}
/**
* Updates the horizontal vertices.
*
*/
updateHorizontalVertices()
{
const vertices = this.vertices;
vertices[9] = vertices[11] = vertices[13] = vertices[15] = this._topHeight;
vertices[17] = vertices[19] = vertices[21] = vertices[23] = this._height - this._bottomHeight;
vertices[25] = vertices[27] = vertices[29] = vertices[31] = this._height;
}
/**
* Updates the vertical vertices.
*
*/
updateVerticalVertices()
{
const vertices = this.vertices;
vertices[2] = vertices[10] = vertices[18] = vertices[26] = this._leftWidth;
vertices[4] = vertices[12] = vertices[20] = vertices[28] = this._width - this._rightWidth;
vertices[6] = vertices[14] = vertices[22] = vertices[30] = this._width;
}
/**
* Renders one segment of the plane.
* to mimic the exact drawing behavior of stretching the image like WebGL does, we need to make sure
* that the source area is at least 1 pixel in size, otherwise nothing gets drawn when a slice size of 0 is used.
*
* @private
* @param {CanvasRenderingContext2D} context - The context to draw with.
* @param {CanvasImageSource} textureSource - The source to draw.
* @param {number} w - width of the texture
* @param {number} h - height of the texture
* @param {number} x1 - x index 1
* @param {number} y1 - y index 1
* @param {number} x2 - x index 2
* @param {number} y2 - y index 2
*/
drawSegment(context, textureSource, w, h, x1, y1, x2, y2)
{
// otherwise you get weird results when using slices of that are 0 wide or high.
const uvs = this.uvs;
const vertices = this.vertices;
let sw = (uvs[x2] - uvs[x1]) * w;
let sh = (uvs[y2] - uvs[y1]) * h;
let dw = vertices[x2] - vertices[x1];
let dh = vertices[y2] - vertices[y1];
// make sure the source is at least 1 pixel wide and high, otherwise nothing will be drawn.
if (sw < 1)
{
sw = 1;
}
if (sh < 1)
{
sh = 1;
}
// make sure destination is at least 1 pixel wide and high, otherwise you get
// lines when rendering close to original size.
if (dw < 1)
{
dw = 1;
}
if (dh < 1)
{
dh = 1;
}
context.drawImage(textureSource, uvs[x1] * w, uvs[y1] * h, sw, sh, vertices[x1], vertices[y1], dw, dh);
}
/**
* The width of the NineSlicePlane, setting this will actually modify the vertices and UV's of this plane
*
* @member {number}
*/
get width()
{
return this._width;
}
set width(value) // eslint-disable-line require-jsdoc
{
this._width = value;
this._refresh();
}
/**
* The height of the NineSlicePlane, setting this will actually modify the vertices and UV's of this plane
*
* @member {number}
*/
get height()
{
return this._height;
}
set height(value) // eslint-disable-line require-jsdoc
{
this._height = value;
this._refresh();
}
/**
* The width of the left column
*
* @member {number}
*/
get leftWidth()
{
return this._leftWidth;
}
set leftWidth(value) // eslint-disable-line require-jsdoc
{
this._leftWidth = value;
this._refresh();
}
/**
* The width of the right column
*
* @member {number}
*/
get rightWidth()
{
return this._rightWidth;
}
set rightWidth(value) // eslint-disable-line require-jsdoc
{
this._rightWidth = value;
this._refresh();
}
/**
* The height of the top row
*
* @member {number}
*/
get topHeight()
{
return this._topHeight;
}
set topHeight(value) // eslint-disable-line require-jsdoc
{
this._topHeight = value;
this._refresh();
}
/**
* The height of the bottom row
*
* @member {number}
*/
get bottomHeight()
{
return this._bottomHeight;
}
set bottomHeight(value) // eslint-disable-line require-jsdoc
{
this._bottomHeight = value;
this._refresh();
}
/**
* Refreshes NineSlicePlane coords. All of them.
*/
_refresh()
{
super._refresh();
const uvs = this.uvs;
const texture = this._texture;
this._origWidth = texture.orig.width;
this._origHeight = texture.orig.height;
const _uvw = 1.0 / this._origWidth;
const _uvh = 1.0 / this._origHeight;
uvs[0] = uvs[8] = uvs[16] = uvs[24] = 0;
uvs[1] = uvs[3] = uvs[5] = uvs[7] = 0;
uvs[6] = uvs[14] = uvs[22] = uvs[30] = 1;
uvs[25] = uvs[27] = uvs[29] = uvs[31] = 1;
uvs[2] = uvs[10] = uvs[18] = uvs[26] = _uvw * this._leftWidth;
uvs[4] = uvs[12] = uvs[20] = uvs[28] = 1 - (_uvw * this._rightWidth);
uvs[9] = uvs[11] = uvs[13] = uvs[15] = _uvh * this._topHeight;
uvs[17] = uvs[19] = uvs[21] = uvs[23] = 1 - (_uvh * this._bottomHeight);
this.updateHorizontalVertices();
this.updateVerticalVertices();
this.dirty++;
this.multiplyUvs();
}
}
