Eric S Fraga writes: > Myles English <mylesengl...@gmail.com> writes:
>> Please could you clarify a couple of things for me? >> >> From your investigations can you say if there is a bug in the orgmode >> use of dvipng, or has dvipng changed so that the expected behaviour is >> no longer supported? I too use a dark display (emacs theme >> zenburn-emacs), get the black fragments in normal latex blocks in org >> files (i.e. not beamer), and org-format-latex-options has no visible >> effect, how can I have white formulae again? > Thanks for prompting me on this. I've explored the code a bit > further. The two approaches, i.e. dvipng vs imagemagick, differ not > only in the tool used to create the image and the source of the image > (dvi versus pdf) but also in the latex code actually created to generate > the image in the first place. > > The dvipng route does not specify any colours in the latex and relies on > dvipng to change explicitly the background and foreground colours. The > imagemagick route, however, creates a latex file that has the colour > specifications directly and the conversion does change any colours. > > So, it could be that dvipng has changed and no longer changes the > colours correctly or it may be that latex has changed in how the dvi > file specifies colours? > > However, I have verified that dvipng will work just fine, without asking > for colour changes, if the dvi is created using the latex code used for > the imagemagick case. This leads me to suggest that both cases (dvipng > and imagemagick) use the same latex code and, in fact, it may be > possible to fold both functions org-create-formula-image-with-dvipng and > org-create-formula-image-with-imagemagick into one... but maybe this > has other repercussions. One such repercussion could be the use of > transparent colour specifications: dvipng would appear to support this > but imagemagick might not (as org appears to use white when transparent > is specified for a background colour, if I understood the code. Thanks for looking into it. Until a conclusion is reached with dvipng this gets things back to normal for me: (setq org-latex-create-formula-image-program 'imagemagick) Myles
