Re: [racket-users] Re: error with pdf-read / libpoppler on Windows
OK, I am a bit of an idiot, but in case someone else reads this thread looking for answers, here are the resolutions I've chased down so far. 1. **I did not read the docs for pdf-read well enough** because right there at the top of the main page, it says it only works on Linux and macOS. *facepalm* 2. When I initially had the problem with pdf-read on Windows, I incorrectly thought that pdf-read needed me to install the racket-poppler package in order to work. 3. I did not realize that racket-poppler and pdf-read were completely independent of each other, and that racket-poppler on its own provides roughly everything that pdf-read does. 4. By using racket-poppler I can get a *little* closer: #lang racket (require racket-poppler) → AppData\Roaming\Racket\6.12\pkgs\racket-poppler\racket-poppler\ffi.rkt:99:0: ffi-obj: couldn't get "g_filename_to_uri" from "C:\\Program Files\\Racket\\lib\\libglib-2.0-0.dll" (The specified procedure could not be found.; errid=127) 5. I have the growing sense that it's probably better, in this case, to roll my own functions rather than risk hassles for Windows users (not that I'm any fan of Windows). I've learned a lot, though! 6. So, nudged by Neil's reply above, I went ahead and wrote my own super-lazy functions to do what I need for now. Here they are: (define (page-count pdf-filename) (define pdf (open-input-file pdf-filename)) (for/sum ([line (in-port read-line pdf)]) (let ([x (regexp-match #px"/Type[\\s]*/Page[^s]" line)]) (if x (count values x) 0 ; Look for first occurrence of the form "/MediaBox [0 0 612.0 792.0]" - Returns the width and height of the box, or #f (define (has-media-box? str) (define mediabox-px #px"/MediaBox\\s*\\[\\s*([0-9\\.])+\\s+([0-9\\.])+\\s+([0-9\\.]+)\\s+([0-9\\.]+)\\s*\\]") (let* ([x (regexp-match mediabox-px str)]) (cond [x (match-let ([(list start-x start-y end-x end-y) (map string->number (rest x))]) (list (- end-x start-x) (- end-y start-y)))] [else #f]))) (define (pagesize pdf-filename) (define pdf (open-input-file pdf-filename)) (for/last ([line (stop-after (in-port read-line pdf) has-media-box?)]) (has-media-box? line))) I can already think of a few cases where these would return inaccurate results (unlinked page objects, varying page sizes, etc). But they are reasonably fast and have worked correctly on the dozen or so test PDFs I've thrown at them. 8. Thank you all for helping and putting up with me. —Joel D. On Friday, March 23, 2018 at 12:50:41 PM UTC-5, Matthew Flatt wrote: > > At Fri, 23 Mar 2018 09:39:41 -0700 (PDT), Joel Dueck wrote: > > On Friday, March 23, 2018 at 9:16:55 AM UTC-5, Greg Trzeciak wrote: > > > > > > So it's clear it's not the path issue, see neighbouring thread on > another > > > possibility - some dependency of libpoppler is missing on Windows > > > > > > > > Ok, I tried Dependency Walker on libpoppler-glib-8.dll, and got all > kinds > > of missing dependencies. > > > > Mostly of the form API-MS-WIN-CORE-PROFILE-L1-1-0.DLL > > You can ignore anything under the system DLLs like "kernel32.dll". > > > Are you using "racket-poppler/ffi.rkt" to load the DLLs, or are you > loading the DLL yourself? If you're not using "racket-poppler/ffi.rkt", > then you'll need to do something like the way it explicitly loads all > of the dependencies of a DLL before loading a DLL: > > > https://github.com/soegaard/racket-poppler/blob/master/racket-poppler/ffi.rkt#L34 > > > I think "libgobject-2.0-0.dll" is missing there, but it gets loaded > anyway by `racket/draw/unsafe/glib`. > > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [racket-users] Re: error with pdf-read / libpoppler on Windows
At Fri, 23 Mar 2018 09:39:41 -0700 (PDT), Joel Dueck wrote: > On Friday, March 23, 2018 at 9:16:55 AM UTC-5, Greg Trzeciak wrote: > > > > So it's clear it's not the path issue, see neighbouring thread on another > > possibility - some dependency of libpoppler is missing on Windows > > > > > Ok, I tried Dependency Walker on libpoppler-glib-8.dll, and got all kinds > of missing dependencies. > > Mostly of the form API-MS-WIN-CORE-PROFILE-L1-1-0.DLL You can ignore anything under the system DLLs like "kernel32.dll". Are you using "racket-poppler/ffi.rkt" to load the DLLs, or are you loading the DLL yourself? If you're not using "racket-poppler/ffi.rkt", then you'll need to do something like the way it explicitly loads all of the dependencies of a DLL before loading a DLL: https://github.com/soegaard/racket-poppler/blob/master/racket-poppler/ffi.rkt#L34 I think "libgobject-2.0-0.dll" is missing there, but it gets loaded anyway by `racket/draw/unsafe/glib`. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[racket-users] Re: error with pdf-read / libpoppler on Windows
hmm... I've tried to see what dependencies would dumpbin show on my machine for libpoppler and it fails with "e:\libpoppler-glib-8.dll : warning LNK4048: Invalid format file; ignored" so it may be that something is wrong with a binary on Windows 10. Still my previous advice (ignore anything below top level tree) still stands On Friday, March 23, 2018 at 6:16:02 PM UTC+1, Greg Trzeciak wrote: > > That's why I actually prefer dumpbin (see the other thread) from depedency > walker - simpler without so many confusing details. > But since you probably don't have VS here is my advice: collapse entire > result tree from dependency walker - leave only top level libraries to see > which ones are missing and ignore the details like API-MS... > > On Friday, March 23, 2018 at 5:39:42 PM UTC+1, Joel Dueck wrote: >> >> On Friday, March 23, 2018 at 9:16:55 AM UTC-5, Greg Trzeciak wrote: >>> >>> So it's clear it's not the path issue, see neighbouring thread on >>> another possibility - some dependency of libpoppler is missing on Windows >>> >>> >> Ok, I tried Dependency Walker on libpoppler-glib-8.dll, and got all >> kinds of missing dependencies. >> >> Mostly of the form API-MS-WIN-CORE-PROFILE-L1-1-0.DLL >> >> I wonder if this is a Windows 10 problem. I probably need to look at >> rolling my own flaky PDF functions after all. >> > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[racket-users] Re: error with pdf-read / libpoppler on Windows
That's why I actually prefer dumpbin (see the other thread) from depedency walker - simpler without so many confusing details. But since you probably don't have VS here is my advice: collapse entire result tree from dependency walker - leave only top level libraries to see which ones are missing and ignore the details like API-MS... On Friday, March 23, 2018 at 5:39:42 PM UTC+1, Joel Dueck wrote: > > On Friday, March 23, 2018 at 9:16:55 AM UTC-5, Greg Trzeciak wrote: >> >> So it's clear it's not the path issue, see neighbouring thread on another >> possibility - some dependency of libpoppler is missing on Windows >> >> > Ok, I tried Dependency Walker on libpoppler-glib-8.dll, and got all kinds > of missing dependencies. > > Mostly of the form API-MS-WIN-CORE-PROFILE-L1-1-0.DLL > > I wonder if this is a Windows 10 problem. I probably need to look at > rolling my own flaky PDF functions after all. > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[racket-users] Re: error with pdf-read / libpoppler on Windows
On Friday, March 23, 2018 at 9:16:55 AM UTC-5, Greg Trzeciak wrote: > > So it's clear it's not the path issue, see neighbouring thread on another > possibility - some dependency of libpoppler is missing on Windows > > Ok, I tried Dependency Walker on libpoppler-glib-8.dll, and got all kinds of missing dependencies. Mostly of the form API-MS-WIN-CORE-PROFILE-L1-1-0.DLL I wonder if this is a Windows 10 problem. I probably need to look at rolling my own flaky PDF functions after all. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[racket-users] Re: error with pdf-read / libpoppler on Windows
BTW, you can use forward slashes on windows for the path "C:/Users/Joel...", I've found it more digestible than "\\" On Friday, March 23, 2018 at 3:05:07 PM UTC+1, Joel Dueck wrote: > > > ; (B) tried absolute path: >(define-ffi-definer define-poppler (ffi-lib > "C:\\Users\\Joel\\AppData\\Roaming\\Racket\\6.12\\lib\\libpoppler-glib-8")) > > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[racket-users] Re: error with pdf-read / libpoppler on Windows
So it's clear it's not the path issue, see neighbouring thread on another possibility - some dependency of libpoppler is missing on Windows On Friday, March 23, 2018 at 3:05:07 PM UTC+1, Joel Dueck wrote: > > On Thursday, March 22, 2018 at 6:14:59 PM UTC-5, Greg Trzeciak wrote: >> >> Last few times I had this error it was one of the following: >> 1. Incorrect version (32 vs 64bit) >> 2. Problem with Path. >> >> For 2. have you tried setting it up with absolute path to eliminate Path >> as a problem? >> > > The poppler package installed is poppler-win32-x86-64 which matches the > 64-bitness of my Racket. > > Not sure precisely which mechanism you had in mind for trying number 2. > But I tried editing ffi.rkt in the pdf-read package as follows: > > ; original: (define-ffi-definer define-poppler (ffi-lib "libpoppler-glib")) > ; (A) tried adding version: > ; (define-ffi-definer define-poppler (ffi-lib "libpoppler-glib" "8")) > ; (B) tried absolute path: >(define-ffi-definer define-poppler (ffi-lib > "C:\\Users\\Joel\\AppData\\Roaming\\Racket\\6.12\\lib\\libpoppler-glib-8")) > > Both edits return basically the same error as before: > > (A) ffi-lib: couldn't open "libpoppler-glib-8.dll" (The specified module > could not be found.; errid=126) > (B) ffi-lib: couldn't open > "C:\\Users\\Joel\\AppData\\Roaming\\Racket\\6.12\\lib\\libpoppler-glib-8.dll" > (The specified module could not be found.; errid=126) > > For testing I did: > > #lang racket > > (require ffi/unsafe setup/dirs); pdf-read) > > (define paths (get-lib-search-dirs)) > > (define (poppler? path) > (string-contains? (path->string path) "poppler-glib")) > > (flatten (for/list ([p paths]) >(find-files poppler? p))) > > Produces: > > > '(#) > > So it should be able to find the dll at least. Perhaps it's just not able > to load it for some other reason. > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[racket-users] Re: error with pdf-read / libpoppler on Windows
On Thursday, March 22, 2018 at 6:14:59 PM UTC-5, Greg Trzeciak wrote: > > Last few times I had this error it was one of the following: > 1. Incorrect version (32 vs 64bit) > 2. Problem with Path. > > For 2. have you tried setting it up with absolute path to eliminate Path > as a problem? > The poppler package installed is poppler-win32-x86-64 which matches the 64-bitness of my Racket. Not sure precisely which mechanism you had in mind for trying number 2. But I tried editing ffi.rkt in the pdf-read package as follows: ; original: (define-ffi-definer define-poppler (ffi-lib "libpoppler-glib")) ; (A) tried adding version: ; (define-ffi-definer define-poppler (ffi-lib "libpoppler-glib" "8")) ; (B) tried absolute path: (define-ffi-definer define-poppler (ffi-lib "C:\\Users\\Joel\\AppData\\Roaming\\Racket\\6.12\\lib\\libpoppler-glib-8")) Both edits return basically the same error as before: (A) ffi-lib: couldn't open "libpoppler-glib-8.dll" (The specified module could not be found.; errid=126) (B) ffi-lib: couldn't open "C:\\Users\\Joel\\AppData\\Roaming\\Racket\\6.12\\lib\\libpoppler-glib-8.dll" (The specified module could not be found.; errid=126) For testing I did: #lang racket (require ffi/unsafe setup/dirs); pdf-read) (define paths (get-lib-search-dirs)) (define (poppler? path) (string-contains? (path->string path) "poppler-glib")) (flatten (for/list ([p paths]) (find-files poppler? p))) Produces: '(#) So it should be able to find the dll at least. Perhaps it's just not able to load it for some other reason. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[racket-users] Re: error with pdf-read / libpoppler on Windows
Last few times I had this error it was one of the following: 1. Incorrect version (32 vs 64bit) 2. Problem with Path. For 2. have you tried setting it up with absolute path to eliminate Path as a problem? G. On Thursday, March 22, 2018 at 10:54:59 PM UTC+1, Joel Dueck wrote: > > Trying to test a new package of mine on Windows. > > On a fresh install of 6.12 on Windows (Win10 if it matters), I installed > package `pdf-read`, as well as `racket-poppler`. > > Running this program in DrRacket: > > #lang racket > > (require pdf-read) > > Results in the error: > > ffi-lib: couldn't open "libpoppler-glib.dll" (The specified module > could not be found.; errid=126) > > Note, I *do* have a `libpoppler-glib-8.dll` (note added `-8`) in these > folders: > > * C:\Users\Joel\AppData\Roaming\Racket\6.12\lib > * > C:\Users\Joel\AppData\Roaming\Racket\6.12\pkgs\poppler-win32-x86-64\racket-poppler > > Did I miss a step? Is it a problem in either pdf-read or racket-poppler? > > Also: is it a problem that pdf-read does not list racket-poppler among its > dependencies? > > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
