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我正在尝试读取 .tga 文件，提取标题和像素数据，检查一些标题值，然后将其写入新的 .tga 文件，但它不会像我想要的那样工作。

struct TGAFILE {
    char idLength;
    char colourMapType;
    char imageType;
    short colourMapStart;
    short colourMapNumEntries;
    char bitsPerEntry;
    short xOrigin;
    short yOrigin;
    short width;
    short height;
    char bitsPerPixel;
    char* pixelData;
};

TGAFILE loadImage(const std::string& pathToImage) {
    std::ifstream image(pathToImage, std::ios::binary);
    if (!image.is_open()) {
        throw FileNotFound();
    }
    TGAFILE tgaFile;
    image.read(&tgaFile.idLength, sizeof(tgaFile.idLength));
    image.read(&tgaFile.colourMapType, sizeof(tgaFile.colourMapType));
    image.read(&tgaFile.imageType, sizeof(tgaFile.imageType));
    image.read((char*)(&tgaFile.colourMapStart), sizeof(tgaFile.colourMapStart));
    image.read((char*)(&tgaFile.colourMapNumEntries), sizeof(tgaFile.colourMapNumEntries));
    image.read(&tgaFile.bitsPerEntry, sizeof(tgaFile.bitsPerEntry));
    image.read((char*)(&tgaFile.xOrigin), sizeof(tgaFile.xOrigin));
    image.read((char*)(&tgaFile.yOrigin), sizeof(tgaFile.yOrigin));
    image.read((char*)(&tgaFile.width), sizeof(tgaFile.width));
    image.read((char*)(&tgaFile.height), sizeof(tgaFile.height));
    image.read(&tgaFile.bitsPerPixel, sizeof(tgaFile.bitsPerPixel));

    int imageDataSize = tgaFile.width * tgaFile.height * (tgaFile.bitsPerPixel / 8);

    tgaFile.pixelData = new char[imageDataSize];

    int originalPosition = (int)image.tellg();
    image.read(tgaFile.pixelData, imageDataSize);
    return tgaFile;
}

（检查一些标题值，但不改变任何东西）

void safeImage(TGAFILE tgaFile){
    std::ofstream output("output.tga", std::ios::binary);
    output.write(&tgaFile.idLength, sizeof(tgaFile.idLength));
    output.write(&tgaFile.colourMapType, sizeof(tgaFile.colourMapType));
    output.write(&tgaFile.imageType, sizeof(tgaFile.imageType));
    output.write(reinterpret_cast<const char*>(&tgaFile.colourMapStart), sizeof(tgaFile.colourMapStart));
    output.write(reinterpret_cast<const char*>(&tgaFile.colourMapNumEntries), sizeof(tgaFile.colourMapNumEntries));
    output.write(&tgaFile.bitsPerEntry, sizeof(tgaFile.bitsPerEntry));
    output.write(reinterpret_cast<const char*>(&tgaFile.xOrigin), sizeof(tgaFile.xOrigin));
    output.write(reinterpret_cast<const char*>(&tgaFile.yOrigin), sizeof(tgaFile.yOrigin));
    output.write(reinterpret_cast<const char*>(&tgaFile.width), sizeof(tgaFile.width));
    output.write(reinterpret_cast<const char*>(&tgaFile.height), sizeof(tgaFile.height));
    output.write(&tgaFile.bitsPerPixel, sizeof(tgaFile.bitsPerPixel));
    output.write(reinterpret_cast<const char*>(&tgaFile.pixelData), sizeof(tgaFile.pixelData));
    output.close();
}

我想我有问题output.write(reinterpret_cast<const char*>(&tgaFile.pixelData), sizeof(tgaFile.pixelData));，但如果我是对的，我仍然不知道它是什么。

帮助将不胜感激。

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