Question

I’m using the open source version Reportlab with Python on Windows. My code loops through multiple PNG files & combines them to form a single PDF. Each PNG is stretched to the full LETTER spec (8.5×11).

Problem is, all the images saved to output.pdf are sandwiched on top of each other and only the last image added is visible. Is there something that I need to add between each drawImage() to offset to a new page? Here’s a simple linear view of what I’m doing –

WIDTH,HEIGHT = LETTER                                            
canv = canvas.Canvas('output.pdf',pagesize=LETTER)               
canv.setPageCompression(0)                                       

page = Image.open('one.png')                                     
canv.drawImage(ImageReader(page),0,0,WIDTH,HEIGHT)

page = Image.open('two.png')                                     
canv.drawImage(ImageReader(page),0,0,WIDTH,HEIGHT)

page = Image.open('three.png')                                   
canv.drawImage(ImageReader(page),0,0,WIDTH,HEIGHT)

canv.save()                                                      

Answer 1

[Follow up of the post’s comment]

Use canv.showPage() after you use canv.drawImage(...) each time.
( http://www.reportlab.com/apis/reportlab/dev/pdfgen.html#reportlab.pdfgen.canvas.Canvas.showPage )

Follow the source document(for that matter any tool you are using, you should dig into it’s respective website documentation):
http://www.reportlab.com/apis/reportlab/dev/pdfgen.html