Duan Lian,
Your request for a better way to pass an image to an output stream
gave me an idea. I have now checked in two new methods for Jmol that
can be accessed by an embedding application or a browser using the
signed applet:
Object nullOrBytesOrStringOrErrorMsg =
jmolViewer.getImageAs(type, quality, width, height, fileName,
outputStream);
String errMsg = jmolViewer.clipImage(textOrNull);
These make it possible for any application -- or for that matter the
signed applet -- to:
write text directly to the system clipboard,
write the current image directly to the system clipboard,
save the image in a file,
get the image as a set of bytes or a Base64 JPG string, or
send image bytes to an open OutputStream
The key to success is to use viewer.scriptWait(), not viewer.script(),
prior to calling one of these methods.
Duan Lian, this should be what you need, and the bonus is that anyone
can use it and you are not restricted to the PNG file type.
command examples:
jmol.viewer.scriptWait("load =1crn;cartoons on;set antialiasdisplay");
Object nullOrErrorMsg = jmol.viewer.getImageAs("JPG", 75, 300,
300, "t75.jpg", null);
Object nullOrErrorMsg = jmol.viewer.getImageAs("JPG", 75, 300,
300, null, os);
Object bytesOrError = jmol.viewer.getImageAs("JPG", 75, 300, 300,
null, null);
Object stringOrError = jmol.viewer.getImageAs("JPG64", 75, 300,
500, null, null);
version=11.7.18_dev
# new feature: (embedded application method of JmolViewer):
#
# public Object viewer.getImageAs(String type,
# int quality,
# int width,
# int height,
# String filename,
# OutputStream outputStream);
#
# allows creation of an image of a given type ("JPG", "JPEG",
"JPG64", "PNG", "GIF", "PPM")
# of a specific quality (-1 indicates default)
# 0 to 100 for JPG (-1 = default of 75)
# 0-9 for PNG (-1 = default of 2)
# and specific width and height
# and returned as byte[] (when fileName = null, os = null)
# or sent to an output stream (os != null)
# or set to a file (os == null, fileName != null)
#
# return can be String if there is an error.
#
# command sequence, for example:
#
# jmol.viewer.scriptWait("load =1crn;cartoons on;set antialiasdisplay");
# Object nullOrErrorMsg = jmol.viewer.getImageAs("JPG", 75, 300,
300, "t75.jpg", null);
# Object nullOrErrorMsg = jmol.viewer.getImageAs("JPG", 75, 300,
300, null, os);
# Object bytesOrError = jmol.viewer.getImageAs("JPG", 75, 300,
300, null, null);
# Object stringOrError = jmol.viewer.getImageAs("JPG64", 75, 300,
300, null, null);
#
# this method, like WRITE IMAGE uses the antialiasImage settings
#
# primarily, this is for writing to an OutputStream directly, but
# the rest seemed simple to implement along with that.
#
# new feature: (embedded application method of JmolViewer):
#
# public String clipImage(String text);
#
# sends image (null parameter) or text to clipboard
#
# new feature: #exitJmol does that.
# new feature: application -d --debug sets loglevel to 5
# new feature: application -J --jmolscript1 Jmol script BEFORE -s
# new feature: application -j --jmolscript2 Jmol script AFTER -s not
accepting values
#
# -----------------------------------------------------------------------------
Bob
src
On Sun, Dec 7, 2008 at 2:47 AM, Duan Lian <[EMAIL PROTECTED]> wrote:
> Robert,
>
> Actually I don't know jmol script can write PNG file directly, but
> it's still not what I want. What I'm writing is a servlet that takes
> PDB file content as POST param, and return the binary content of PNG
> image as response stream. "write image" script writes directly into a
> local file. It's possible to use the script to write PNG as a temp
> file on local disk, and then read it into response stream of HTTP
> response. But the script is also executed in a unblocked way, so it's
> still a problem to determine when to read the image file from my local
> disk.
>
> Best Regards,
> Duan Lian
>
>>From: Robert Hanson <[EMAIL PROTECTED]> - 2008-12-06 23:16
>>Duan Lian,
>>
>>Please tell us a bit more about your PDB2PNG renderer. Specifically,
>>why not just use the capability of Jmol to write PNG files?
>>You can even do this in command-line mode without ever calling up a
>>display. Is there something special that you are trying to do, or is
>>t possible that you didn't realize that Jmol does this already.
>>
>>For example:
>>
>>load =1crn
>>cartoons on;color group
>>write image 500 500 PNG "myfile.png"
>
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--
Robert M. Hanson
Professor of Chemistry
St. Olaf College
1520 St. Olaf Ave.
Northfield, MN 55057
http://www.stolaf.edu/people/hansonr
phone: 507-786-3107
If nature does not answer first what we want,
it is better to take what answer we get.
-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900
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