Method: Magick::Image.read_inline

Defined in:
ext/RMagick/rmimage.cpp

.read_inline(content) {|info| ... } ⇒ Array<Magick::Image>

Read a Base64-encoded image.

Parameters:

  • content (String) —

    the content

Yields:

  • (info)

Yield Parameters:

Returns:



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# File 'ext/RMagick/rmimage.cpp', line 11699

VALUE
Image_read_inline(VALUE self ATTRIBUTE_UNUSED, VALUE content)
{
    VALUE info_obj;
    Image *images;
    ImageInfo *info;
    char *image_data;
    size_t x, image_data_l;
    unsigned char *blob;
    size_t blob_l;
    ExceptionInfo *exception;

    image_data = rm_str2cstr(content, &image_data_l);

    // Search for a comma. If found, we'll set the start of the
    // image data just following the comma. Otherwise we'll assume
    // the image data starts with the first byte.
    for (x = 0; x < image_data_l; x++)
    {
        if (image_data[x] == ',')
        {
            break;
        }
    }
    if (x < image_data_l)
    {
        image_data += x + 1;
    }

    GVL_STRUCT_TYPE(Base64Decode) args_Base64Decode = { image_data, &blob_l };
    blob = (unsigned char *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(Base64Decode), &args_Base64Decode);
    if (blob_l == 0)
    {
        rb_raise(rb_eArgError, "can't decode image");
    }

    exception = AcquireExceptionInfo();

    // Create a new Info structure for this read. About the
    // only useful attribute that can be set is `format'.
    info_obj = rm_info_new();
    TypedData_Get_Struct(info_obj, Info, &rm_info_data_type, info);

    GVL_STRUCT_TYPE(BlobToImage) args_BlobToImage = { info, blob, blob_l, exception };
    images = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BlobToImage), &args_BlobToImage);
    magick_free((void *)blob);

    rm_check_exception(exception, images, DestroyOnError);
    DestroyExceptionInfo(exception);

    rm_set_user_artifact(images, info);
    rm_sync_image_options(images, info);

    RB_GC_GUARD(info_obj);

    return array_from_images(images);
}