mirror of
https://github.com/photonstorm/phaser
synced 2024-11-16 09:48:18 +00:00
79 lines
2.2 KiB
JavaScript
79 lines
2.2 KiB
JavaScript
/**
|
|
* Original shader by Daniil (https://www.shadertoy.com/view/4sl3DH)
|
|
* Tweaked, uniforms added and converted to Phaser/PIXI by Richard Davey
|
|
*/
|
|
Phaser.Filter.HueRotate = function (game) {
|
|
|
|
Phaser.Filter.call(this, game);
|
|
|
|
this.uniforms.alpha = { type: '1f', value: 1.0 };
|
|
this.uniforms.size = { type: '1f', value: 0.03 };
|
|
this.uniforms.iChannel0 = { type: 'sampler2D', value: null, textureData: { repeat: true } }
|
|
|
|
this.fragmentSrc = [
|
|
|
|
"precision mediump float;",
|
|
"uniform vec2 resolution;",
|
|
"uniform float time;",
|
|
"uniform float alpha;",
|
|
"uniform sampler2D iChannel0;",
|
|
|
|
"/* Simple hue rotation filter based on article:",
|
|
"http://beesbuzz.biz/code/hsv_color_transforms.php",
|
|
"*/",
|
|
|
|
"#define SPEED 10.0",
|
|
|
|
"void main(void)",
|
|
"{",
|
|
"vec2 uv = gl_FragCoord.xy / resolution.xy;",
|
|
|
|
"float c = cos(time * SPEED);",
|
|
"float s = sin(time * SPEED);",
|
|
|
|
"mat4 hueRotation =",
|
|
"mat4( 0.299, 0.587, 0.114, 0.0,",
|
|
"0.299, 0.587, 0.114, 0.0,",
|
|
"0.299, 0.587, 0.114, 0.0,",
|
|
"0.000, 0.000, 0.000, 1.0) +",
|
|
|
|
"mat4( 0.701, -0.587, -0.114, 0.0,",
|
|
"-0.299, 0.413, -0.114, 0.0,",
|
|
"-0.300, -0.588, 0.886, 0.0,",
|
|
"0.000, 0.000, 0.000, 0.0) * c +",
|
|
|
|
"mat4( 0.168, 0.330, -0.497, 0.0,",
|
|
"-0.328, 0.035, 0.292, 0.0,",
|
|
"1.250, -1.050, -0.203, 0.0,",
|
|
"0.000, 0.000, 0.000, 0.0) * s;",
|
|
|
|
"vec4 pixel = texture2D(iChannel0, uv);",
|
|
|
|
"gl_FragColor = pixel * hueRotation;",
|
|
"}"
|
|
];
|
|
|
|
};
|
|
|
|
Phaser.Filter.HueRotate.prototype = Object.create(Phaser.Filter.prototype);
|
|
Phaser.Filter.HueRotate.prototype.constructor = Phaser.Filter.HueRotate;
|
|
|
|
Phaser.Filter.HueRotate.prototype.init = function (width, height, texture) {
|
|
|
|
this.setResolution(width, height);
|
|
|
|
this.uniforms.iChannel0.value = texture;
|
|
|
|
}
|
|
|
|
Object.defineProperty(Phaser.Filter.HueRotate.prototype, 'alpha', {
|
|
|
|
get: function() {
|
|
return this.uniforms.alpha.value;
|
|
},
|
|
|
|
set: function(value) {
|
|
this.uniforms.alpha.value = value;
|
|
}
|
|
|
|
});
|