Matrix transformation for a page

[duangdoock]

Hi everyone
Is it possible to execute a Matrix transformation for a page? Thanks in advance

[JorjMcKie]

1. You can render a page to a Pixmap image using a matrix.
2. You can set a page's rotation to one of 0, 90, 180, 270 degrees.
3. You can prefix a page's content stream (i.e. its appearance source code) with a matrix such that everything that follows will be subject to the matrix's influence. How this works can be seen in the source code of method Page.remove_rotation(). But be aware that this is low-level coding and you are on yourself here and will have to experiment with the results.

[JorjMcKie]

Here is a snippet which does some nonsense to a page:

# define PDF source code from some matrix
cont=("%g %g %g %g %g %g cm " % tuple(pymupdf.Matrix(1, -1, 0, 1, 0, 0))).encode()
# prefix the page's /Contents with this command
pymupdf.TOOLS._insert_contents(page, cont, overlay=0)

Page image before:

and after:

[duangdoock]

Thanks for this explanation. I'll test it.
Regards

[JorjMcKie]

Best lookup the documentation to understand what has happened here.
Some hint: the green and red lines which did not react to the matrix are annotations - and annotations are not part of the page's appearance commands.