/* eslint-disable max-len */
const BLEND = 0;
const OFFSET = 1;
const CULLING = 2;
const DEPTH_TEST = 3;
const WINDING = 4;
/**
* This is a webGL state. It is passed The WebGL StateManager.
* Each mesh renderered may require webGL to be in a different state.
* For example you may want different blend mode or to enable polygon offsets
*
* @class
* @memberof PIXI
*/
export default class State
{
/**
*
*/
constructor()
{
this.data = 0;
this.blendMode = 0;
this.polygonOffset = 0;
this.blend = true;
// this.depthTest = true;
}
/**
* Activates blending of the computed fragment color values
*
* @member {boolean}
*/
get blend()
{
return !!(this.data & (1 << BLEND));
}
set blend(value) // eslint-disable-line require-jsdoc
{
if (!!(this.data & (1 << BLEND)) !== value)
{
this.data ^= (1 << BLEND);
}
}
/**
* Activates adding an offset to depth values of polygon's fragments
*
* @member {boolean}
* @default false
*/
get offsets()
{
return !!(this.data & (1 << OFFSET));
}
set offsets(value) // eslint-disable-line require-jsdoc
{
if (!!(this.data & (1 << OFFSET)) !== value)
{
this.data ^= (1 << OFFSET);
}
}
/**
* Activates culling of polygons.
*
* @member {boolean}
* @default false
*/
get culling()
{
return !!(this.data & (1 << CULLING));
}
set culling(value) // eslint-disable-line require-jsdoc
{
if (!!(this.data & (1 << CULLING)) !== value)
{
this.data ^= (1 << CULLING);
}
}
/**
* Activates depth comparisons and updates to the depth buffer.
*
* @member {boolean}
* @default false
*/
get depthTest()
{
return !!(this.data & (1 << DEPTH_TEST));
}
set depthTest(value) // eslint-disable-line require-jsdoc
{
if (!!(this.data & (1 << DEPTH_TEST)) !== value)
{
this.data ^= (1 << DEPTH_TEST);
}
}
/**
* Specifies whether or not front or back-facing polygons can be culled.
* @member {boolean}
* @default false
*/
get clockwiseFrontFace()
{
return !!(this.data & (1 << WINDING));
}
set clockwiseFrontFace(value) // eslint-disable-line require-jsdoc
{
if (!!(this.data & (1 << WINDING)) !== value)
{
this.data ^= (1 << WINDING);
}
}
/**
* The blend mode to be applied when this state is set. Apply a value of `PIXI.BLEND_MODES.NORMAL` to reset the blend mode.
* Setting this mode to anything other than NO_BLEND will automatically switch blending on.
*
* @member {boolean}
* @default PIXI.BLEND_MODES.NORMAL
* @see PIXI.BLEND_MODES
*/
get blendMode()
{
return this._blendMode;
}
set blendMode(value) // eslint-disable-line require-jsdoc
{
// 17 is NO BLEND
this.blend = (value !== 17);
this._blendMode = value;
}
/**
* The polygon offset. Setting this property to anything other than 0 will automatically enable poygon offset fill.
*
* @member {number}
* @default 0
*/
get polygonOffset()
{
return this._polygonOffset;
}
set polygonOffset(value) // eslint-disable-line require-jsdoc
{
this.offsets = !!value;
this._polygonOffset = value;
}
}