Function BuildAnimationStructure

src/wx_send_xml.cpp:410–467

===== 动图结构构建 =====

    // ===== 动图结构构建 =====
    void* BuildAnimationStructure(const XmlFields& fields)
    {
        void* xmlFieldPtr = Memory::Allocate(0x400);
        if (!xmlFieldPtr) return nullptr;

        // 分配字符串内存
        void* md5Ptr = nullptr;
        void* productidPtr = nullptr;

        if (!fields.md5.empty()) {
            md5Ptr = Memory::Allocate(fields.md5.length() + 1);
            Memory::WriteString(md5Ptr, fields.md5);
        }

        if (!fields.productid.empty()) {
            std::string utf8ProductId = StringUtils::AnsiToUtf8(fields.productid);
            productidPtr = Memory::Allocate(utf8ProductId.length() + 1);
            Memory::WriteString(productidPtr, utf8ProductId);
        }

        uintptr_t base = reinterpret_cast<uintptr_t>(xmlFieldPtr);

        // 填充字段
        if (md5Ptr) {
            Memory::Write<void*>(reinterpret_cast<void*>(base + 0x198), md5Ptr);
            Memory::Write<uint64_t>(reinterpret_cast<void*>(base + 0x1A8), fields.md5.length());
            Memory::Write<uint64_t>(reinterpret_cast<void*>(base + 0x1B0), fields.md5.length());
        }

        Memory::Write<uint32_t>(reinterpret_cast<void*>(base + 0x190), fields.length);
        Memory::Write<uint32_t>(reinterpret_cast<void*>(base + 0x258), fields.type);
        Memory::Write<uint32_t>(reinterpret_cast<void*>(base + 0x25C), fields.width);
        Memory::Write<uint32_t>(reinterpret_cast<void*>(base + 0x260), fields.height);

        if (productidPtr) {
            Memory::Write<void*>(reinterpret_cast<void*>(base + 0x1B8), productidPtr);
            size_t productidLen = fields.productid.length();
            Memory::Write<uint64_t>(reinterpret_cast<void*>(base + 0x1C8), productidLen);
            Memory::Write<uint64_t>(reinterpret_cast<void*>(base + 0x1D0), productidLen);
        }

        // 构建链表
        void* listHead = BuildLinkedList();
        if (listHead) {
            Memory::Write<void*>(reinterpret_cast<void*>(base + 0x30), listHead);
        }

        // 写入虚表指针
        Memory::Write<uint64_t>(reinterpret_cast<void*>(base + 0x0), g_weixinBase + Offsets::ANIMATION_FIELD_VTABLE);
        Memory::Write<uint64_t>(reinterpret_cast<void*>(base + 0x8), 0x100000006);
        Memory::Write<uint64_t>(reinterpret_cast<void*>(base + 0x10), g_weixinBase + Offsets::ANIMATION_FIELD_VTABLE2);
        Memory::Write<uint64_t>(reinterpret_cast<void*>(base + 0x18), 1);
        Memory::Write<uint64_t>(reinterpret_cast<void*>(base + 0x20), 0);
        Memory::Write<uint64_t>(reinterpret_cast<void*>(base + 0x28), 0x3F800000);
        Memory::Write<uint64_t>(reinterpret_cast<void*>(base + 0x38), 0xA);

        return xmlFieldPtr;
    }