var DEFAULT_BORDER_SIZE= 10;
var Plane = require('./Plane');
/**
* 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
* var 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
* @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)
*
*/
function NineSlicePlane(texture, leftWidth, topHeight, rightWidth, bottomHeight)
{
Plane.call(this, texture, 4, 4);
var 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;
}
// constructor
NineSlicePlane.prototype = Object.create( Plane.prototype );
NineSlicePlane.prototype.constructor = NineSlicePlane;
module.exports = NineSlicePlane;
Object.defineProperties(NineSlicePlane.prototype, {
/**
* The width of the NineSlicePlane, setting this will actually modify the vertices and UV's of this plane
*
* @member {number}
* @memberof PIXI.NineSlicePlane#
* @override
*/
width: {
get: function ()
{
return this._width;
},
set: function (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#
* @override
*/
height: {
get: function ()
{
return this._height;
},
set: function (value)
{
this._height = value;
this.updateHorizontalVertices();
}
},
/**
* The width of the left column
*
* @member {number}
*/
leftWidth: {
get: function()
{
return this._leftWidth;
},
set: function (value)
{
this._leftWidth = value;
var uvs = this.uvs;
var 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}
*/
rightWidth: {
get: function()
{
return this._rightWidth;
},
set: function (value)
{
this._rightWidth = value;
var uvs = this.uvs;
var 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}
*/
topHeight: {
get: function()
{
return this._topHeight;
},
set: function (value)
{
this._topHeight = value;
var uvs = this.uvs;
var 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}
*/
bottomHeight: {
get: function()
{
return this._bottomHeight;
},
set: function (value)
{
this._bottomHeight = value;
var uvs = this.uvs;
var 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;
}
}
});
NineSlicePlane.prototype.updateHorizontalVertices = function() {
var 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;
};
NineSlicePlane.prototype.updateVerticalVertices = function() {
var 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
*
* @param renderer {PIXI.CanvasRenderer}
* @private
*/
NineSlicePlane.prototype._renderCanvas= function (renderer)
{
var context = renderer.context;
context.globalAlpha = this.worldAlpha;
var transform = this.worldTransform;
var 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);
}
var base = this._texture.baseTexture;
var textureSource = base.source;
var w = base.width;
var 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.
*
* @param context
* @param textureSource
* @param w width of the texture
* @param h height of the texture
* @param x1
* @param y1
* @param x2
* @param y2
* @private
*/
NineSlicePlane.prototype.drawSegment= function (context, textureSource, w, h, x1, y1, x2, y2)
{
// otherwise you get weird results when using slices of that are 0 wide or high.
var uvs = this.uvs;
var vertices = this.vertices;
var sw = (uvs[x2]-uvs[x1]) * w;
var sh = (uvs[y2]-uvs[y1]) * h;
var dw = vertices[x2] - vertices[x1];
var 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);
};
