Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I encoded a flatdecoded Stream of a PDF in IText, unfortunately I have a clean text but can’t exactely tell what it means… in PDF 32000 there is no documentation about this topic… is there any other documentation about this matter?
example
q
0 0 1 rg
0 0 520 150 re
f
0 g
Q
q
BT
36 806 Td
ET
Q
ISO 32000-1:2008 (this is the document you referred to as PDF 32000, isn’t it?) documents all the contents of your example stream, especially have a look at chapters 8 Graphics and 9 Text:
8.4.2 Graphics State Stack: The q operator shall push a copy of the entire graphics state onto the stack.
Table 74 Colour Operators: rg – Same as RG but used for nonstroking operations.
ibidem: RG – Set the stroking colour space to DeviceRGB (or the DefaultRGB colour space; see 8.6.5.6, “Default Colour Spaces”) and set the colour to use for stroking operations. Each operand shall be a number between 0.0 (minimum intensity) and 1.0 (maximum intensity).
Table 59 Path Construction Operators: re – Append a rectangle to the current path as a complete subpath, with lower-left corner (x, y) and dimensions widthand height in user space.
Table 60 Path-Painting Operators: f – Fill the path, using the nonzero winding number rule to determine the region to fill (see 8.5.3.3.2, “Nonzero Winding Number Rule”). Any subpaths that are open shall be implicitly closed before being filled.
Table 74 Colour Operators: g – Same as G but used for nonstroking operations
ibidem: G – Set the stroking colour space to DeviceGray (or the DefaultGray colour space; see 8.6.5.6, “Default Colour Spaces”) and set the gray level to use for stroking operations. gray shall be a number between 0.0 (black) and 1.0 (white).
8.4.2 Graphics State Stack: The q operator shall push a copy of the entire graphics state onto the stack. The Q operator shall restore the entire graphics state to its former value by popping it from the stack.
9.4.1 General (in 9.4 Text Objects): A text object begins with the BT operator and ends with the ET operator
Table 108 Text-positioning operators: Td – Move to the start of the next line, offset from the start of the current line by (tx, ty). tx and ty shall denote numbers expressed in unscaled text space units. More precisely, this operator shall perform these assignments
9.4.1 General (in 9.4 Text Objects): A text object begins with the BT operator and ends with the ET operator
8.4.2 Graphics State Stack: The Q operator shall restore the entire graphics state to its former value by popping it from the stack.
If you have questions concerning details of one or the other operations, you’ll find lots of information in the surrounding clear text. If after studying that there still are questions, feel free to ask.