Change document text color to black

set_text_color.py

# set_text_color.py

# import utils to load required shared libraries
from utils import inputPath, outputPath
from pdfixsdk.Pdfix import *

def SetTextColor(page: PdfPage, color: PdfColor):
  pDoc = page.GetDoc()
  content = page.GetContent()
  
  for i in range(content.GetNumObjects()):
    content_obj = content.GetObject(i)
    if content_obj.GetObjectType() is kPdsPageText:
      text_obj = content_obj
      text_state = text_obj.GetTextState()
      
      text_state.color_state.fill_color = color
      text_obj.SetTextState(text_state)       
    
pdfix  = GetPdfix()
if pdfix is None:
    raise Exception('Pdfix Initialization fail')

doc = pdfix.OpenDoc(outputPath + "/alt_text.pdf", "")
if doc is None:
    raise Exception('Unable to open pdf : ' + pdfix.GetError())
  
# Creates black color
rgb_color_space = doc.CreateColorSpace(kColorSpaceDeviceRGB)
black = rgb_color_space.CreateColor()
black.SetValue(0,0) # sets red
black.SetValue(1,0) # sets green
black.SetValue(2,0) # sets blue

for i in range(doc.GetNumPages()):
    page = doc.AcquirePage(i)
    SetTextColor(page, black)
    page.SetContent()
    page.Release()
    
if not doc.Save(outputPath + "/output.pdf", kSaveFull):
  raise Exception(pdfix.GetError())

doc.Close()