| /* |
| ** Copyright (c) 2013 The Khronos Group Inc. |
| ** |
| ** Permission is hereby granted, free of charge, to any person obtaining a |
| ** copy of this software and/or associated documentation files (the |
| ** "Materials"), to deal in the Materials without restriction, including |
| ** without limitation the rights to use, copy, modify, merge, publish, |
| ** distribute, sublicense, and/or sell copies of the Materials, and to |
| ** permit persons to whom the Materials are furnished to do so, subject to |
| ** the following conditions: |
| ** |
| ** The above copyright notice and this permission notice shall be included |
| ** in all copies or substantial portions of the Materials. |
| ** |
| ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
| */ |
| |
| function constructTypedArray(type, data) { |
| if (type == 'Int8Array') { |
| return new Int8Array(data); |
| } else if (type == 'Uint8Array') { |
| return new Uint8Array(data); |
| } else if (type == 'Uint8ClampedArray') { |
| return new Uint8ClampedArray(data); |
| } else if (type == 'Int16Array') { |
| return new Int16Array(data); |
| } else if (type == 'Uint16Array') { |
| return new Uint16Array(data); |
| } else if (type == 'Int32Array') { |
| return new Int32Array(data); |
| } else if (type == 'Uint32Array') { |
| return new Uint32Array(data); |
| } else if (type == 'Float32Array') { |
| return new Float32Array(data); |
| } else if (type == 'Float64Array') { |
| return new Float64Array(data); |
| } |
| } |
| |
| function constructDataView(subType, elementSizeInBytes, data) { |
| var setter = "set" + subType; |
| var byteOffset = 0; |
| var buffer = new ArrayBuffer(elementSizeInBytes * data.length); |
| var dataView = new DataView(buffer); |
| for (var ii = 0; ii < data.length; ++ii) { |
| dataView[setter](byteOffset, data[ii]); |
| byteOffset += elementSizeInBytes; |
| } |
| return dataView; |
| } |
| |
| onmessage = function(event) { |
| var message = event.data; |
| if (message.command == 'copy' || |
| message.command == 'transfer' || |
| message.command == 'copyBuffer' || |
| message.command == 'transferBuffer') { |
| var view; |
| if (message.type != 'DataView') { |
| view = constructTypedArray(message.type, message.data); |
| } else { |
| view = constructDataView(message.subType, message.elementSizeInBytes, message.data); |
| } |
| var valueToSend; |
| if (message.command == 'copy' || |
| message.command == 'transfer') { |
| valueToSend = view; |
| } else { |
| valueToSend = view.buffer; |
| } |
| var transferablesToSend = []; |
| if (message.command == 'transfer' || |
| message.command == 'transferBuffer') { |
| transferablesToSend = [ view.buffer ]; |
| } |
| postMessage(valueToSend, transferablesToSend); |
| } else if (message.command == 'pong') { |
| postMessage(message.data, message.transferables); |
| } else if (message.command == 'ignore') { |
| } else { |
| postMessage('error: unknown message'); |
| } |
| }; |