Legacy ImageMagick Discussions Archive

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f:\web\im>%IM%convert -verbose anypdf.pdf NULL:

[ghostscript library 9.19] -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMax
Bitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 "-sDEVICE=pngalpha" -dTextAlpha
Bits=4 -dGraphicsAlphaBits=4 "-r72x72"  "-sOutputFile=C:/Users/Alan/AppData/Loca
l/Temp/magick-9716IjIQZTenPOQ9%d" "-fC:/Users/Alan/AppData/Local/Temp/magick-971
6SDTYWpT_bDjC" "-fC:/Users/Alan/AppData/Local/Temp/magick-9716nEGea0bRxec3"C:/Us
ers/Alan/AppData/Local/Temp/magick-9716IjIQZTenPOQ91 PNG 200x100 200x100+0+0 8-b
it sRGB 419B 0.016u 0:00.016

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import re
import subprocess
startupinfo = subprocess.STARTUPINFO()  # Suppress terminal popup
startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW  # Suppress terminal popup
IM_output = subprocess.check_output('convert -verbose test.pdf NULL:', startupinfo=startupinfo)
temp_loc = re.search('(?<=-sOutputFile=).*?(?=/magick-)', str(IM_output)).group(0)
print(temp_loc)

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convert rose: test.pdf

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# Setup and prep using ImageMagick 7.8.0-14
import os
import re
import sys
import subprocess

startupinfo = None
# Windows suppress terminal popup
if sys.platform.startswith('win'):
    startupinfo = subprocess.STARTUPINFO()
    startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW

# Step 1 - test functionality by making the pdf
subprocess.call('magick rose: im_test.pdf', startupinfo=startupinfo, shell=True)
# Step 2 - generate the verbose output which seems to trigger on converting an existing image
IM_output = subprocess.check_output('magick -verbose im_test.pdf NULL:', startupinfo=startupinfo)
# Step 3 - kill that test file
os.unlink('im_test.pdf')
# Step 4 - regex the temp directory
im_temp_loc = re.search('(?<=-sOutputFile=).*?(?=/magick-)', str(IM_output)).group(0)

# Step 5 - Run rest of program
# All those calls to your actual program stuff goes here.
# May involve some temp files getting generated and failing to delete when ImageMagick fails.


# Step 6 - Delete magick- files from temp directory
# Define function to delete temp files based on path and file prefix
def clear_temp_files(temp_folder_path, file_prefix):
    temp_file_count = 0
    for filename in os.listdir(temp_folder_path):
        if filename.startswith(file_prefix):
            # DON'T UNCOMMENT OS.UNLINK BELOW UNTIL YOU ARE SOLID ON RESULTS! WILL DELETE THINGS!
            # os.unlink(os.path.join(temp_folder_path, filename))
            # COMMENT below print and UNCOMMENT above os.unlink after testing to delete files.
            print(os.path.join(temp_folder_path, filename))
            temp_file_count += 1
    return temp_file_count


# Execute and get file count
deleted_temp_files = clear_temp_files(im_temp_loc, 'magick-')
print('Temp files deleted: ' + str(deleted_temp_files))