From 71760514fc044f273914c17b1510fa3cf10419b3 Mon Sep 17 00:00:00 2001
From: LaG1924 <12997935+LaG1924@users.noreply.github.com>
Date: Fri, 21 Apr 2017 18:31:43 +0500
Subject: 2017-04-21

---
 Section.cpp | 126 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 Section.cpp

(limited to 'Section.cpp')

diff --git a/Section.cpp b/Section.cpp
new file mode 100644
index 0000000..a04ed41
--- /dev/null
+++ b/Section.cpp
@@ -0,0 +1,126 @@
+#include <iostream>
+#include "Section.hpp"
+
+Section::Section(byte *dataBlocks, size_t dataBlocksLength, byte *dataLight, byte *dataSky, byte bitsPerBlock,
+                 std::vector<unsigned short> palette) {
+    m_dataBlocksLen = dataBlocksLength;
+    m_dataBlocks = new byte[m_dataBlocksLen];
+    std::copy(dataBlocks, dataBlocks + m_dataBlocksLen, m_dataBlocks);
+
+    m_dataLight = new byte[2048];
+    std::copy(dataLight, dataLight + 2048, m_dataLight);
+
+    if (dataSky) {
+        m_dataSkyLight = new byte[2048];
+        std::copy(dataSky, dataSky + 2048, m_dataSkyLight);
+    }
+
+    m_palette = palette;
+    m_bitsPerBlock = bitsPerBlock;
+}
+
+Section::Section() {
+}
+
+Section::~Section() {
+    delete[] m_dataBlocks;
+    m_dataBlocksLen = 0;
+    m_dataBlocks = nullptr;
+    delete[] m_dataLight;
+    m_dataLight = nullptr;
+    delete[] m_dataSkyLight;
+    m_dataSkyLight = nullptr;
+}
+
+Block &Section::GetBlock(PositionI pos) {
+    if (m_dataBlocks != nullptr) {
+        Parse();
+    }
+    return m_blocks[pos.GetY() * 256 + pos.GetZ() * 16 + pos.GetX()];
+}
+
+void Section::Parse() {
+    if (m_dataBlocks == nullptr)
+        return;
+
+    long long *longArray = reinterpret_cast<long long *>(m_dataBlocks);
+    for (int i = 0; i < m_dataBlocksLen / 8; i++)
+        endswap(&longArray[i]);
+    std::vector<unsigned short> blocks;
+    blocks.reserve(4096);
+    int bitPos = 0;
+    unsigned short t = 0;
+    for (int i = 0; i < m_dataBlocksLen; i++) {
+        for (int j = 0; j < 8; j++) {
+            t |= (m_dataBlocks[i] & 0x01) ? 0x80 : 0x00;
+            t >>= 1;
+            m_dataBlocks[i] >>= 1;
+            bitPos++;
+            if (bitPos >= m_bitsPerBlock) {
+                bitPos = 0;
+                t >>= m_bitsPerBlock - 1;
+                blocks.push_back(t);
+                t = 0;
+            }
+        }
+    }
+
+    std::vector<byte> light;
+    light.reserve(4096);
+    for (int i = 0; i < 2048; i++) {
+        byte t = m_dataLight[i];
+        byte first = t & 0b11110000;
+        byte second = t >> 4;
+        light.push_back(first);
+        light.push_back(second);
+    }
+    for (int i = 0; i < 4096; i++) {
+        unsigned short blockId = m_palette.size() > 0 ? m_palette[blocks[i]] : blocks[i];
+        Block block(blockId, light[i]);
+        m_blocks.push_back(block);
+    }
+    if ((light.size() + blocks.size()) / 2 != 4096) {
+        throw 118;
+    }
+    delete[] m_dataBlocks;
+    m_dataBlocksLen = 0;
+    m_dataBlocks = nullptr;
+    delete[] m_dataLight;
+    m_dataLight = nullptr;
+    delete[] m_dataSkyLight;
+    m_dataSkyLight = nullptr;
+}
+
+Section &Section::operator=(Section other) {
+    other.swap(*this);
+    return *this;
+}
+
+void Section::swap(Section &other) {
+    std::swap(other.m_dataBlocksLen, m_dataBlocksLen);
+    std::swap(other.m_dataBlocks, m_dataBlocks);
+    std::swap(other.m_dataLight, m_dataLight);
+    std::swap(other.m_dataSkyLight, m_dataSkyLight);
+    std::swap(other.m_blocks, m_blocks);
+    std::swap(other.m_palette, m_palette);
+    std::swap(other.m_bitsPerBlock, m_bitsPerBlock);
+}
+
+Section::Section(const Section &other) {
+    m_dataBlocksLen = other.m_dataBlocksLen;
+    m_dataBlocks = new byte[m_dataBlocksLen];
+    std::copy(other.m_dataBlocks,other.m_dataBlocks+m_dataBlocksLen,m_dataBlocks);
+
+    m_dataLight = new byte[2048];
+    std::copy(other.m_dataLight,other.m_dataLight+2048,m_dataLight);
+
+    if (other.m_dataSkyLight) {
+        m_dataSkyLight = new byte[2048];
+        std::copy(other.m_dataSkyLight,other.m_dataSkyLight+2048,m_dataSkyLight);
+    }
+
+    m_palette = other.m_palette;
+    m_bitsPerBlock = other.m_bitsPerBlock;
+}
+
+
-- 
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