Qt使用libheif库显示苹果的heic图片

1.先使用vcpkg安装libheif库

自己根据需要选择位数以及动态库还是静态库

vcpkg install libheif:x86-windows-static
vcpkg install libheif:x64-windows-static

2.直接上代码

#include <QApplication>
#include <QLabel>
#include <QImage>
#include <QPixmap>
#include <libheif/heif.h>
#include <iostream>

QImage heifToQImage(const std::string& filePath) {
    // 初始化 libheif 句柄
    struct heif_context* ctx = heif_context_alloc();
    if (!ctx) {
        throw std::runtime_error("Failed to allocate HEIF context.");
    }

    // 读取 HEIF 文件
    struct heif_error err = heif_context_read_from_file(ctx, filePath.c_str(), nullptr);
    if (err.code != heif_error_Ok) {
        heif_context_free(ctx);
        throw std::runtime_error("Failed to read HEIF file: " + std::string(err.message));
    }

    // 获取主图像句柄
    struct heif_image_handle* handle = nullptr;
    err = heif_context_get_primary_image_handle(ctx, &handle);
    if (err.code != heif_error_Ok) {
        heif_context_free(ctx);
        throw std::runtime_error("Failed to get primary image handle: " + std::string(err.message));
    }

    // 解码图像
    struct heif_image* img = nullptr;
    err = heif_decode_image(handle, &img, heif_colorspace_RGB, heif_chroma_interleaved_RGBA, nullptr);
    if (err.code != heif_error_Ok) {
        heif_image_handle_release(handle);
        heif_context_free(ctx);
        throw std::runtime_error("Failed to decode HEIF image: " + std::string(err.message));
    }

    // 获取图像数据
    int width = heif_image_get_width(img, heif_channel_interleaved);
    int height = heif_image_get_height(img, heif_channel_interleaved);
    const uint8_t* data = heif_image_get_plane_readonly(img, heif_channel_interleaved, nullptr);

    // 创建缓冲区并复制数据
    QVector<uchar> buffer(width * height * 4); // RGBA8888，每像素4字节
    memcpy(buffer.data(), data, buffer.size());

    // 转换为 QImage
    QImage qimage(buffer.data(), width, height, QImage::Format_RGBA8888);

    // 释放资源
    heif_image_release(img);
    heif_image_handle_release(handle);
    heif_context_free(ctx);

    return qimage.copy(); // 确保 QImage 独立持有数据
}


int main(int argc, char* argv[]) {
    QApplication app(argc, argv);

    try {
        QImage image = heifToQImage("C:/Users/lianx/Pictures/IMG_0001.HEIC");

        QLabel label;
        label.setPixmap(QPixmap::fromImage(image));
        label.setScaledContents(true);
        label.resize(image.size()/2);
        label.show();

        return app.exec();
    }
    catch (const std::exception& e) {
        std::cerr << "Error: " << e.what() << std::endl;
        return -1;
    }
}

3.效果如图