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.mesh.Plane
* @memberof PIXI.mesh
*
*/
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);
const uvs = this.uvs;
// right and bottom uv's are always 1
uvs[6] = uvs[14] = uvs[22] = uvs[30] = 1;
uvs[25] = uvs[27] = uvs[29] = uvs[31] = 1;
this._origWidth = texture.width;
this._origHeight = texture.height;
this._uvw = 1 / this._origWidth;
this._uvh = 1 / this._origHeight;
/**
* 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 = texture.width;
/**
* 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 = texture.height;
uvs[2] = uvs[10] = uvs[18] = uvs[26] = this._uvw * leftWidth;
uvs[4] = uvs[12] = uvs[20] = uvs[28] = 1 - (this._uvw * rightWidth);
uvs[9] = uvs[11] = uvs[13] = uvs[15] = this._uvh * topHeight;
uvs[17] = uvs[19] = uvs[21] = uvs[23] = 1 - (this._uvh * bottomHeight);
/**
* The width of the left column (a)
*
* @member {number}
*/
this.leftWidth = typeof leftWidth !== 'undefined' ? leftWidth : DEFAULT_BORDER_SIZE;
/**
* The width of the right column (b)
*
* @member {number}
*/
this.rightWidth = typeof rightWidth !== 'undefined' ? rightWidth : DEFAULT_BORDER_SIZE;
/**
* The height of the top row (c)
*
* @member {number}
*/
this.topHeight = typeof topHeight !== 'undefined' ? topHeight : DEFAULT_BORDER_SIZE;
/**
* The height of the bottom row (d)
*
* @member {number}
*/
this.bottomHeight = typeof bottomHeight !== 'undefined' ? bottomHeight : DEFAULT_BORDER_SIZE;
}
/**
* 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 the object using the Canvas renderer
*
* @private
* @param {PIXI.CanvasRenderer} renderer - The canvas renderer to render with.
*/
_renderCanvas(renderer)
{
const context = renderer.context;
context.globalAlpha = this.worldAlpha;
const transform = this.worldTransform;
const res = renderer.resolution;
if (renderer.roundPixels)
{
context.setTransform(
transform.a * res,
transform.b * res,
transform.c * res,
transform.d * res,
(transform.tx * res) | 0,
(transform.ty * res) | 0
);
}
else
{
context.setTransform(
transform.a * res,
transform.b * res,
transform.c * res,
transform.d * res,
transform.tx * res,
transform.ty * res
);
}
const base = this._texture.baseTexture;
const textureSource = base.source;
const w = base.width;
const h = base.height;
this.drawSegment(context, textureSource, w, h, 0, 1, 10, 11);
this.drawSegment(context, textureSource, w, h, 2, 3, 12, 13);
this.drawSegment(context, textureSource, w, h, 4, 5, 14, 15);
this.drawSegment(context, textureSource, w, h, 8, 9, 18, 19);
this.drawSegment(context, textureSource, w, h, 10, 11, 20, 21);
this.drawSegment(context, textureSource, w, h, 12, 13, 22, 23);
this.drawSegment(context, textureSource, w, h, 16, 17, 26, 27);
this.drawSegment(context, textureSource, w, h, 18, 19, 28, 29);
this.drawSegment(context, textureSource, w, h, 20, 21, 30, 31);
}
/**
* 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}
* @memberof PIXI.NineSlicePlane#
*/
get width()
{
return this._width;
}
/**
* Sets the width.
*
* @param {number} value - the value to set to.
*/
set width(value)
{
this._width = value;
this.updateVerticalVertices();
}
/**
* The height of the NineSlicePlane, setting this will actually modify the vertices and UV's of this plane
*
* @member {number}
* @memberof PIXI.NineSlicePlane#
*/
get height()
{
return this._height;
}
/**
* Sets the height.
*
* @param {number} value - the value to set to.
*/
set height(value)
{
this._height = value;
this.updateHorizontalVertices();
}
/**
* The width of the left column
*
* @member {number}
*/
get leftWidth()
{
return this._leftWidth;
}
/**
* Sets the width of the left column.
*
* @param {number} value - the value to set to.
*/
set leftWidth(value)
{
this._leftWidth = value;
const uvs = this.uvs;
const vertices = this.vertices;
uvs[2] = uvs[10] = uvs[18] = uvs[26] = this._uvw * value;
vertices[2] = vertices[10] = vertices[18] = vertices[26] = value;
this.dirty = true;
}
/**
* The width of the right column
*
* @member {number}
*/
get rightWidth()
{
return this._rightWidth;
}
/**
* Sets the width of the right column.
*
* @param {number} value - the value to set to.
*/
set rightWidth(value)
{
this._rightWidth = value;
const uvs = this.uvs;
const vertices = this.vertices;
uvs[4] = uvs[12] = uvs[20] = uvs[28] = 1 - (this._uvw * value);
vertices[4] = vertices[12] = vertices[20] = vertices[28] = this._width - value;
this.dirty = true;
}
/**
* The height of the top row
*
* @member {number}
*/
get topHeight()
{
return this._topHeight;
}
/**
* Sets the height of the top row.
*
* @param {number} value - the value to set to.
*/
set topHeight(value)
{
this._topHeight = value;
const uvs = this.uvs;
const vertices = this.vertices;
uvs[9] = uvs[11] = uvs[13] = uvs[15] = this._uvh * value;
vertices[9] = vertices[11] = vertices[13] = vertices[15] = value;
this.dirty = true;
}
/**
* The height of the bottom row
*
* @member {number}
*/
get bottomHeight()
{
return this._bottomHeight;
}
/**
* Sets the height of the bottom row.
*
* @param {number} value - the value to set to.
*/
set bottomHeight(value)
{
this._bottomHeight = value;
const uvs = this.uvs;
const vertices = this.vertices;
uvs[17] = uvs[19] = uvs[21] = uvs[23] = 1 - (this._uvh * value);
vertices[17] = vertices[19] = vertices[21] = vertices[23] = this._height - value;
this.dirty = true;
}
}
