You definitely don't want a period in your format string. Why are you calling (.drawImage g img 0 0 width height nil). What's the nil for? I'd try dropping it.
On Thu, Feb 27, 2014 at 5:17 PM, larry google groups < lawrencecloj...@gmail.com> wrote: > and if I look here: > > http://www.mkyong.com/java/how-to-write-an-image-to-file-imageio/ > > I see this example: > > > > ImageIO.write(image, "jpg",new File("C:\\out.jpg")); > ImageIO.write(image, "gif",new File("C:\\out.gif")); > ImageIO.write(image, "png",new File("C:\\out.png")); > > > None of those formatting strings have a period in them. And yet when I > remove the period from my extension, I get an error. And even with it, > nothing happens and nothing gets written to disk. > > > > > > On Thursday, February 27, 2014 5:04:50 PM UTC-5, larry google groups wrote: >> >> I wanted to see what Format strings I am allowed, so at the repl: >> >> >> user> (import 'javax.imageio.ImageIO) >> javax.imageio.ImageIO >> >> user> (require '[clojure.pprint :as pp]) >> >> user> (pp/pprint (javax.imageio.ImageIO/getReaderFormatNames))["BMP", >> "bmp", "jpg", "JPG", "wbmp", "jpeg", "png", "JPEG", "PNG", "WBMP", "GIF", >> "gif"] >> >> (fs/extension) was returning ".JPG" with a period. I thought that might >> be the problem so I removed it: >> >> (defn make-thumbnail [filename path-to-new-file-including-file-name >> width] >> {:pre [(= (type filename) java.lang.String) >> (fs/exists? filename) >> (= (type path-to-new-file-including-file-name) java.lang.String) >> (number? width)]} >> (println " we will write thumbnails to here: " (str >> path-to-new-file-including-file-name)) >> (let [ext (st/replace (fs/extension filename) #"\." "") >> img (get-file-as-image filename) >> imgtype (java.awt.image.BufferedImage/TYPE_INT_ARGB) >> width (min (.getWidth img) width) >> height (* (/ width (.getWidth img)) (.getHeight img)) >> simg (java.awt.image.BufferedImage. width height imgtype) >> g (.createGraphics simg)] >> (.drawImage g img 0 0 width height nil) >> (.dispose g) >> (pp/pprint simg) >> (println "the extension we use:") >> (pp/pprint ext) >> (javax.imageio.ImageIO/write simg ext (io/as-file >> path-to-new-file-including-file-name)))) >> >> So the final println gives me: >> >> the extension we use: >> "JPG" >> >> and yet now I get: >> >> Exception in thread "Thread-1" javax.imageio.IIOException: Invalid >> argument to native writeImage >> at com.sun.imageio.plugins.jpeg.JPEGImageWriter.writeImage(Native Method) >> >> which is surprising since the Format string, without the period, should >> be more correct. >> >> >> >> >> >> On Thursday, February 27, 2014 4:47:31 PM UTC-5, larry google groups >> wrote: >>> >>> >>> Hmm, I made it a little further. Now I am trying to write a thumbnail to >>> disk. I have copied the code from StackOverflow. I am using this function: >>> >>> (defn make-thumbnail [filename path-to-new-file-including-file-name >>> width] >>> {:pre [(= (type filename) java.lang.String) >>> (fs/exists? filename) >>> (= (type path-to-new-file-including-file-name) >>> java.lang.String) >>> (number? width)]} >>> (println " we will write thumbnails to here: " (str >>> path-to-new-file-including-file-name)) >>> (let [ext (fs/extension filename) >>> img (get-file-as-image filename) >>> imgtype (java.awt.image.BufferedImage/TYPE_INT_ARGB) >>> width (min (.getWidth img) width) >>> height (* (/ width (.getWidth img)) (.getHeight img)) >>> simg (java.awt.image.BufferedImage. width height imgtype) >>> g (.createGraphics simg)] >>> (.drawImage g img 0 0 width height nil) >>> (.dispose g) >>> (pp/pprint simg) >>> (javax.imageio.ImageIO/write simg ext (io/as-file >>> path-to-new-file-including-file-name)))) >>> >>> >>> This line: >>> >>> (println " we will write thumbnails to here: " (str >>> path-to-new-file-including-file-name)) >>> >>> shows me this, which is the path I want: >>> >>> we will write thumbnails to here: /Users/larry/tma_files/ >>> processed/b5838394-a86c-411f-b556-94b30c26a553IMG_1175_180.JPG >>> >>> This line: >>> >>> (pp/pprint simg) >>> >>> gives me: >>> >>> #<BufferedImage BufferedImage@7ac84a5b: type = 2 DirectColorModel: >>> rmask=ff0000 gmask=ff00 bmask=ff amask=ff000000 IntegerInterleavedRaster: >>> width = 125 height = 93 #Bands = 4 xOff = 0 yOff = 0 dataOffset[0] 0> >>> >>> I do not get any errors or exceptions, but nothing gets written to disk. >>> Can anyone suggest why? >>> >>> If I look here: >>> >>> http://docs.oracle.com/javase/7/docs/api/javax/imageio/ >>> ImageIO.html#write(java.awt.image.RenderedImage, java.lang.String, >>> java.io.File) >>> >>> Writes an image using an arbitrary ImageWriter that supports the given >>> format to a File. If there is already a Filepresent, its contents are >>> discarded. >>> Parameters:im - a RenderedImage to be written.formatName - a String containg >>> the informal name of the format.output - a File to be written to. >>> Returns:false if no appropriate writer is found. >>> >>> I am unsure what "false if no appropriate writer is found" means. I >>> have added code to be sure that only jpeg, gif and png files get to this >>> function. >>> >>> Any suggestions why nothing gets written to disk? >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> On Thursday, February 27, 2014 4:09:10 PM UTC-5, larry google groups >>> wrote: >>>> >>>> >>>> Ah, I see what happened. There was a Microsoft Word document in my >>>> folder of images. It was causing the problems. I had no error handling for >>>> non-images. >>>> >>>> >>>> >>>> On Thursday, February 27, 2014 3:52:09 PM UTC-5, Aaron Cohen wrote: >>>>> >>>>> On Thu, Feb 27, 2014 at 3:44 PM, larry google groups < >>>>> lawrenc...@gmail.com> wrote: >>>>> >>>>>> I tried this too: >>>>>> >>>>>> (ns tma-make-thumbnails.make-images >>>>>> (:import >>>>>> (java.util UUID) >>>>>> (javax.imageio ImageIO) >>>>>> (java.awt.image BufferedImage) >>>>>> (javax.imageio ImageReader)) >>>>>> >>>>>> >>>>>> >>>>>> (defn get-file-as-image [filename] >>>>>> {:pre [(= (type filename) java.lang.String) >>>>>> (fs/exists? filename) >>>>>> (fs/file? (io/as-file filename))] >>>>>> :post [(do (pp/pprint %) true) >>>>>> (= (type %) java.awt.image.BufferedImage)]} >>>>>> (.read ImageIO (io/as-file filename))) >>>>>> >>>>> >>>>> This is trying to invoke the "read" method of the Class instance >>>>> representing "javax.imageio.ImageIO". This is surely not what you want. >>>>> >>>>> >>>>>> but that only gives me: >>>>>> >>>>>> Exception in thread "Thread-1" java.lang.IllegalArgumentException: >>>>>> No matching method found: read for class java.lang.Class >>>>>> >>>>>> I don't get why ImageIO is java.lang.Class after I imported it. >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> On Thursday, February 27, 2014 3:09:53 PM UTC-5, larry google groups >>>>>> wrote: >>>>>>> >>>>>>> I have no background with Java so I tend to suffer pain when dealing >>>>>>> with it. I am trying to create a thumbnail for an image, but my code >>>>>>> dies >>>>>>> on the :post assertion of this function: >>>>>>> >>>>>>> (defn get-file-as-image [filename] >>>>>>> {:pre [(= (type filename) java.lang.String) >>>>>>> (fs/exists? filename) >>>>>>> (fs/file? (io/as-file filename))] >>>>>>> :post [(do (pp/pprint %) true) >>>>>>> (= (type %) BufferedImage)]} >>>>>>> (javax.imageio.ImageIO/read (io/as-file filename))) >>>>>>> >>>>>> >>>>> >>>>> This is the correct syntax for invoking a static method of a class. >>>>> I'm not sure why it's not working for you. What kind of file are you >>>>> trying >>>>> to load? >>>>> >>>>> >>>> -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. 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