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snippet loading

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This commit is contained in:
Gyuri Horák 2023-02-16 19:42:33 +01:00
parent 3f3f40b331
commit 68e54df51b
Signed by: dyuri
GPG Key ID: 4993F07B3EAE8D38
2 changed files with 75 additions and 20 deletions
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34
demo/index.html
View File

@ -22,14 +22,40 @@
</style>
</head>
<body>
<repa-shader fs-input="fsinput" alpha mouse snippet-prefix="../src/snippets">
<script type="x-shader/x-vertex">
attribute vec3 position;
<repa-shader fs-input="fsinput" alpha mouse snippets="noise.glsl" width=512 height=512>
<script type="x-shader/x-fragmen">
void main() {
gl_Position = vec4(position, 1.0);
vec2 uv = gl_FragCoord.xy / resolution.xy;
vec3 col = .5 + .5 * cos(uv.xyx + time + vec3(0, 2, 4));
float dist = distance(uv, mouse);
float circle = smoothstep(.1, .2, dist) * .5 + .5;
vec4 acolor = vec4(col * circle, circle);
outColor = vec4(acolor);
}
</script>
<script type="x-shader/x-fragment">
void main() {
vec2 n,N,q,p=FC.xy/r.y;
float S=9.,a,j;
for(mat2 m=rotate2D(5.);j++<30.;){
p*=m;
n*=m;
q=p*S+j+n+t;
a+=dot(cos(q)/S,r/r);
n+=q=sin(q);
N+=q/(S+60.);
S*=1.2;
}
o+=pow(max(o-o,(a+.5)*.1*vec4(6,1,2,0)+.003/length(N)),o-o+.45);
}
</script>
<script type="x-shader/x-fragmen">
precision highp float;
uniform vec2 resolution;
uniform vec2 mouse;
uniform float time;
out vec4 outColor;
void main() {
vec2 uv = gl_FragCoord.xy / resolution.xy;
vec3 col = .5 + .5 * cos(uv.xyx + time + vec3(0, 2, 4));

61
src/repa-shader.js
View File

@ -49,9 +49,8 @@ void main() {
`;
class RepaShader extends HTMLElement {
constructor(cfg = {}) {
constructor() {
super();
this._cfg = cfg;
this.attachShadow({ mode: 'open' });
this.logger = createLogger(["%c[repa-shader]", "background: #1d2021; color: #bada55"]);
this._snippets = {};
@ -65,7 +64,7 @@ class RepaShader extends HTMLElement {
}
if (!this._gl) {
const glopts = this._cfg.glopts || {alpha: this.hasAttribute('alpha'), preserveDrawingBuffer: true};
const glopts = {alpha: this.hasAttribute('alpha'), preserveDrawingBuffer: true};
this._gl = this._target.getContext('webgl2', glopts);
if (!this._gl) {
this.logger.error("WebGL2 not supported");
@ -74,8 +73,6 @@ class RepaShader extends HTMLElement {
}
// TODO resize
// TODO postprogram
// TODO source + reset
this._gl.bindBuffer(this._gl.ARRAY_BUFFER, this._gl.createBuffer());
this._gl.bufferData(this._gl.ARRAY_BUFFER, new Float32Array([-1,1,0,-1,-1,0,1,1,0,1,-1,0]), this._gl.STATIC_DRAW);
@ -84,7 +81,6 @@ class RepaShader extends HTMLElement {
this._gl.disable(this._gl.BLEND);
this._gl.clearColor(0,0,0,1);
// TODO remove
this.render(this.getFragmentShaderSource());
}
@ -97,7 +93,18 @@ class RepaShader extends HTMLElement {
}
get snippetPrefix() {
return this.getAttribute('snippet-prefix') || 'snippets';
if (this.hasAttribute('snippet-prefix')) {
return this.getAttribute('snippet-prefix');
}
let path = '';
if (import.meta?.url) {
const pathparts = new URL(import.meta.url).pathname.split('/');
pathparts.pop();
path = pathparts.join('/');
}
return path + '/snippets';
}
async loadSnippet(name) {
@ -123,11 +130,21 @@ class RepaShader extends HTMLElement {
return this._snippets[name];
}
async _getSnippets() {
if (!this.hasAttribute('snippets')) {
return '';
}
const snippetNames = this.getAttribute('snippets').split(',');
const promises = snippetNames.map(s => this.getSnippet(s));
return await Promise.all(promises).then(snippets => snippets.join('\n'));
}
_resizeTarget() {
const {width, height} = this._target.getBoundingClientRect();
this._target.width = width;
this._target.height = height;
// TODO buffers
this._gl.viewport(0, 0, width, height);
}
@ -169,7 +186,6 @@ class RepaShader extends HTMLElement {
return;
}
// TODO geek mode
const resolution = 'resolution';
const mouse = 'mouse';
const nowTime = 'time';
@ -209,7 +225,6 @@ class RepaShader extends HTMLElement {
++this._frame;
this._gl.useProgram(this.program);
// TODO buffers
this._gl.enableVertexAttribArray(this._attLocation);
this._gl.vertexAttribPointer(this._attLocation, 3, this._gl.FLOAT, false, 0, 0);
@ -263,10 +278,18 @@ class RepaShader extends HTMLElement {
return shader;
}
get width() {
return this.getAttribute('width');
}
get height() {
return this.getAttribute('height');
}
_createTarget() {
const target = document.createElement('canvas');
target.width = this._cfg.width || 300; // TODO
target.height = this._cfg.height || 300; // TODO
target.width = this.width || 300; // TODO
target.height = this.height || 300; // TODO
this.shadowRoot.appendChild(target);
return target;
@ -291,7 +314,6 @@ class RepaShader extends HTMLElement {
return this._target;
}
// TODO
get VS() {
return `#version 300 es
in vec3 position;
@ -309,29 +331,36 @@ void main(){
// TODO: mrt
let mode = this.mode;
if (!mode) {
const hasVersion = this._fsSource.startsWith('#version');
const hasPrecision = this._fsSource.includes('precision');
const hasMain = this._fsSource.includes('main()');
if (hasPrecision) {
if (hasVersion) {
mode = 'raw';
} else if (hasPrecision) {
mode = 'classic';
} else if (hasMain) {
mode = 'geeker';
} else {
mode = 'geekest';
}
this.logger.info(`Auto guessing mode: ${mode}`);
}
let start = '';
let end = '';
let snippets = '';
switch (mode) {
case 'classic':
start = CHUNKS.es300;
break;
case 'geeker':
start = CHUNKS.es300 + CHUNKS.geeker;
snippets = await this._getSnippets();
start = CHUNKS.es300 + CHUNKS.geeker + snippets;
break;
case 'geekest':
snippets = await this._getSnippets();
const noise = await this.getSnippet('noise.glsl');
start = CHUNKS.es300 + CHUNKS.geeker + noise + CHUNKS.geekestStart;
start = CHUNKS.es300 + CHUNKS.geeker + noise + snippets + CHUNKS.geekestStart;
end = CHUNKS.geekestEnd;
break;
}