Problem insert_image : scale image and cell format

Hi,

I am using XlsxWriter to do set image with my size (with scale parameters) on excel but when the cells format on row context have a cell format (wrap text or police), the scaling change at opening file.

I am using Python version 3.7 and Excel version 19.09 via 365.

Here is some code that demonstrates the problem:

import xlsxwriter
import base64
import io

def main():
    _PICTURE_BASE64 = "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"
    bytes_data = base64.b64decode(_PICTURE_BASE64)
    data_img = io.BytesIO(bytes_data)

    original_height = 5.47
    original_width = 6.35
    height = 4.48
    width = 5.14
    workbook = xlsxwriter.Workbook("output_img.xlsx")
    worksheet = workbook.add_worksheet()
    x_scale = width / original_width
    y_scale = height / original_height


    height_manualy = 126
    worksheet.set_row(0, height_manualy)
    worksheet.insert_image(0, 1, 'Image 1',
                           {'image_data': data_img, 'y_scale': y_scale, 'x_scale': x_scale, 'object_position': 2})

    cell_format = workbook.add_format({'size': 50})
    worksheet.write(2, 0, "Text\nText2", cell_format)
    worksheet.insert_image(2, 1, 'Image 2',
                           {'image_data': data_img, 'y_scale': y_scale, 'x_scale': x_scale, 'object_position': 2})

    workbook.close()

if __name__ == '__main__': main()

I read the source code, and i understand, is the a problem like autofit engineering, xlsxwriter use row/col sizes informations to know size and calculate width and height img.

I can to get around with set_row height (like from example Image 1) but, i need to know with the size img to convert mm/pixels to unit of excel to do like Image 1 on my example)

Thanks!

[jmcnamara]

Sorry for not getting back to you on this.

If you have a working solution that is good.

If I was doing this I would work in pixels and make sure you take the DPI scaling into account (which I think you do).

At some stage I plan to make the XlsxWriter image metric routines public to make it easier to deal with these types of cases.

[Clorel]

Hi, My solution (with height_final_cm and width_final_cm variable):

                # get_image_properties from inherit workbook class, with no setter on private object
                result = workbook.get_image_properties('None', value)

                width_px = result[1]
                height_px = result[2]
                dpi_w = result[4]
                dpi_h = result[5]

                width_in = width_px / dpi_w
                height_in = height_px / dpi_h

                conversion_in_to_cm = 2.54  # 25.4 to mm

                width_cm = width_in * conversion_in_to_cm
                height_cm = height_in * conversion_in_to_cm
                x_scale = width_final_cm / width_cm
                y_scale = height_final_cm / height_cm
                
                cell_column = int(command.attrib['idx_column_1']) - 1
                cell_row = int(command.attrib['idx_row_1']) - 1
                idx_worksheet = int(command.attrib['idx_sheet']) - 1

                # Define size image to stretch
                constante_points_by_cm = 28.35
                pixel_by_point_width = 0.75
                constante_points_width_by_cm = conversion_in_to_cm * constante_points_by_cm * pixel_by_point_width / 10
                height_pt = round(height_final_cm * constante_points_by_cm, 2)
                width_pt = round(width_final_cm * constante_points_width_by_cm, 2)

                # Set stretch
                worksheet.set_row(cell_row, height_pt)
                worksheet.set_column(cell_column, cell_column, width_pt)