8、OpenVX 编程：图导出导入与基本图像变换

OpenVX 编程：图导出导入与基本图像变换

1. OpenVX 图的导出与保存

在 OpenVX 中，当图导出成功时，我们可以将其保存到文件中。以下是导出图并保存到文件的代码示例：

if ( VX_SUCCESS == status) {
    /* We have a valid export of length bytes at address blob. Do
    something with it like writing it
    to a file... */
    if (argc == 2) {
        const char * filename = argv[1];
        FILE *fp = fopen(filename, "wb");
        if (fp) {
            if ((fwrite(blob, length, 1, fp) == 1) && (fclose(fp) == 0))
            {
                printf("Wrote the exported graph to file ’%s’, total %zu bytes\n", filename, length);
            } else {
                fclose(fp);
                printf("Error writing to file ’%s’\n", filename);
            }
        } else {
            printf("Could