43 lines
2.0 KiB
JavaScript
43 lines
2.0 KiB
JavaScript
mergeInto(LibraryManager.library, {
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// 定义供 C/C++ 调用的 JS 函数
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js_batchRender_malloc: function(data, size, isSync) {
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// 直接从 WASM 内存创建视图（零拷贝）
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const binaryData = new Uint8Array(Module.HEAPU8.buffer, data, size);
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// 转换为标准 ArrayBuffer（如果需要复制）
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const targetBuffer =
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binaryData.buffer.slice(binaryData.byteOffset, binaryData.byteOffset + binaryData.byteLength);
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//console.log("processBinaryData invoke");
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const extBuffer = new ArrayBuffer(1);
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const headerBuffer = new ArrayBuffer(8);
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const headerBufferView = new DataView(headerBuffer);
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headerBufferView.setUint32(0, 0xDEC0DE, true);
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headerBufferView.setUint32(4, mtl.ctx.__uid(), true);
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const merged = new Uint8Array(headerBuffer.byteLength + targetBuffer.byteLength);
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merged.set(new Uint8Array(headerBuffer), 0);
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merged.set(new Uint8Array(targetBuffer), headerBuffer.byteLength);
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if(!isSync){
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mtl.batchRenderAsync(merged.buffer, extBuffer);
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return null;
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}
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const result = mtl.batchRender(merged.buffer, extBuffer).buffer;
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if(result.byteLength == 0){
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return null;;
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}
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// 申请内存空间,后续在cpp wasm部分使用，记得释放
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const ptr = Module._malloc(result.byteLength);
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// 将数据拷贝到WASM内存
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Module.HEAPU8.set(new Uint8Array(result), ptr);
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// 返回结构化的数据信息（指针和长度）
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const ret = new DataView(new ArrayBuffer(8));
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ret.setUint32(0, ptr, true); // 指针地址（4字节）
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ret.setUint32(4, result.byteLength, true); // 数据长度（4字节）
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// 返回合并后的8字节缓冲区指针，记得也要在cpp部分释放
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const retPtr = Module._malloc(8);
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Module.HEAPU8.set(new Uint8Array(ret.buffer), retPtr);
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return retPtr;
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},
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js_swapWindow: function(){
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mtl.swapWindow();
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}
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}); |