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1×
| import util from './core/util';
import Compositor from './compositor/Compositor';
import CompoSceneNode from './compositor/SceneNode';
import CompoTextureNode from './compositor/TextureNode';
import CompoFilterNode from './compositor/FilterNode';
import Shader from './Shader';
import Texture from './Texture';
import Texture2D from './Texture2D';
import TextureCube from './TextureCube';
var shaderSourceReg = /^#source\((.*?)\)/;
/**
* @name clay.createCompositor
* @function
* @param {Object} json
* @param {Object} [opts]
* @return {clay.compositor.Compositor}
*/
function createCompositor(json, opts) {
var compositor = new Compositor();
opts = opts || {};
var lib = {
textures: {},
parameters: {}
};
var afterLoad = function(shaderLib, textureLib) {
for (var i = 0; i < json.nodes.length; i++) {
var nodeInfo = json.nodes[i];
var node = createNode(nodeInfo, lib, opts);
if (node) {
compositor.addNode(node);
}
}
};
for (var name in json.parameters) {
var paramInfo = json.parameters[name];
lib.parameters[name] = convertParameter(paramInfo);
}
// TODO load texture asynchronous
loadTextures(json, lib, opts, function(textureLib) {
lib.textures = textureLib;
afterLoad();
});
return compositor;
}
function createNode(nodeInfo, lib, opts) {
var type = nodeInfo.type || 'filter';
var shaderSource;
var inputs;
var outputs;
if (type === 'filter') {
var shaderExp = nodeInfo.shader.trim();
var res = shaderSourceReg.exec(shaderExp);
if (res) {
shaderSource = Shader.source(res[1].trim());
}
else if (shaderExp.charAt(0) === '#') {
shaderSource = lib.shaders[shaderExp.substr(1)];
}
if (!shaderSource) {
shaderSource = shaderExp;
}
if (!shaderSource) {
return;
}
}
if (nodeInfo.inputs) {
inputs = {};
for (var name in nodeInfo.inputs) {
if (typeof nodeInfo.inputs[name] === 'string') {
inputs[name] = nodeInfo.inputs[name];
}
else {
inputs[name] = {
node: nodeInfo.inputs[name].node,
pin: nodeInfo.inputs[name].pin
};
}
}
}
if (nodeInfo.outputs) {
outputs = {};
for (var name in nodeInfo.outputs) {
var outputInfo = nodeInfo.outputs[name];
outputs[name] = {};
if (outputInfo.attachment != null) {
outputs[name].attachment = outputInfo.attachment;
}
if (outputInfo.keepLastFrame != null) {
outputs[name].keepLastFrame = outputInfo.keepLastFrame;
}
if (outputInfo.outputLastFrame != null) {
outputs[name].outputLastFrame = outputInfo.outputLastFrame;
}
if (outputInfo.parameters) {
outputs[name].parameters = convertParameter(outputInfo.parameters);
}
}
}
var node;
if (type === 'scene') {
node = new CompoSceneNode({
name: nodeInfo.name,
scene: opts.scene,
camera: opts.camera,
outputs: outputs
});
}
else if (type === 'texture') {
node = new CompoTextureNode({
name: nodeInfo.name,
outputs: outputs
});
}
// Default is filter
else {
node = new CompoFilterNode({
name: nodeInfo.name,
shader: shaderSource,
inputs: inputs,
outputs: outputs
});
}
if (node) {
if (nodeInfo.parameters) {
for (var name in nodeInfo.parameters) {
var val = nodeInfo.parameters[name];
if (typeof(val) === 'string') {
val = val.trim();
if (val.charAt(0) === '#') {
val = lib.textures[val.substr(1)];
}
else {
node.on(
'beforerender', createSizeSetHandler(
name, tryConvertExpr(val)
)
);
}
}
node.setParameter(name, val);
}
}
if (nodeInfo.defines && node.pass) {
for (var name in nodeInfo.defines) {
var val = nodeInfo.defines[name];
node.pass.material.define('fragment', name, val);
}
}
}
return node;
}
function convertParameter(paramInfo) {
var param = {};
if (!paramInfo) {
return param;
}
['type', 'minFilter', 'magFilter', 'wrapS', 'wrapT', 'flipY', 'useMipmap']
.forEach(function(name) {
var val = paramInfo[name];
if (val != null) {
// Convert string to enum
if (typeof val === 'string') {
val = Texture[val];
}
param[name] = val;
}
});
['width', 'height']
.forEach(function(name) {
if (paramInfo[name] != null) {
var val = paramInfo[name];
if (typeof val === 'string') {
val = val.trim();
param[name] = createSizeParser(
name, tryConvertExpr(val)
);
}
else {
param[name] = val;
}
}
});
if (paramInfo.useMipmap != null) {
param.useMipmap = paramInfo.useMipmap;
}
return param;
}
function loadTextures(json, lib, opts, callback) {
if (!json.textures) {
callback({});
return;
}
var textures = {};
var loading = 0;
var cbd = false;
var textureRootPath = opts.textureRootPath;
util.each(json.textures, function(textureInfo, name) {
var texture;
var path = textureInfo.path;
var parameters = convertParameter(textureInfo.parameters);
if (Array.isArray(path) && path.length === 6) {
if (textureRootPath) {
path = path.map(function(item) {
return util.relative2absolute(item, textureRootPath);
});
}
texture = new TextureCube(parameters);
}
else if(typeof path === 'string') {
if (textureRootPath) {
path = util.relative2absolute(path, textureRootPath);
}
texture = new Texture2D(parameters);
}
else {
return;
}
texture.load(path);
loading++;
texture.once('success', function() {
textures[name] = texture;
loading--;
if (loading === 0) {
callback(textures);
cbd = true;
}
});
});
if (loading === 0 && !cbd) {
callback(textures);
}
}
function createSizeSetHandler(name, exprFunc) {
return function (renderer) {
// PENDING viewport size or window size
var dpr = renderer.getDevicePixelRatio();
// PENDING If multiply dpr ?
var width = renderer.getWidth();
var height = renderer.getHeight();
var result = exprFunc(width, height, dpr);
this.setParameter(name, result);
};
}
function createSizeParser(name, exprFunc) {
return function (renderer) {
var dpr = renderer.getDevicePixelRatio();
var width = renderer.getWidth();
var height = renderer.getHeight();
return exprFunc(width, height, dpr);
};
}
function tryConvertExpr(string) {
// PENDING
var exprRes = /^expr\((.*)\)$/.exec(string);
if (exprRes) {
try {
var func = new Function('width', 'height', 'dpr', 'return ' + exprRes[1]);
// Try run t
func(1, 1);
return func;
}
catch (e) {
throw new Error('Invalid expression.');
}
}
}
export default createCompositor;
|