Hi
I'm doing some server-side graphics with Java2D and I'm trying to stream the resulting image to the browser using send_data. When I try to view the image that I streamed, the browser just shows the URL in the window as a very small image (about .4 kb) when I am using jpeg format. For png, it tells me that the image has errors and can't load it.
Here's what I'm doing in the controller:
def sendImage biFiltered = BI.new(100, 100, BI::TYPE_INT_RGB) big = biFiltered.createGraphics() $w = 0 $h = 0 begin filename = "#{RAILS_ROOT}/public/images/kids.jpg" imagefile = java.io.File.new(filename) bi = javax.imageio.ImageIO.read(imagefile) w = bi.getWidth(nil); h = bi.getHeight(nil); $stderr.print "after getting size" if bi.getType != BI.TYPE_INT_RGB bi2 = BI.new(w, h, BI::TYPE_INT_RGB) $stderr.print "before get graphics" big = bi2.createGraphics() $stderr.print "after getting graphics" big.drawImage(biFiltered, 0, 0, nil) bi = b2 biFiltered = bi end rescue $stderr.print "Couldn't load file" end # big.drawImage(biFiltered, 0, 0, w, h, w/0.7, w/0.7, nil) big.drawImage(biFiltered, java.awt.geom.AffineTransform.getScaleInstance(2, 2), nil) os = java.io.ByteArrayOutputStream.new begin isWritten = javax.imageio.ImageIO.write(biFiltered, "jpeg", os) rescue $stderr.print "Couldn't write file" end
if isWritten #send_data , :type => "image/jpeg", :disposition => "inline", :filename => newkids.jpg
send_data "os.toByteArray", :type => "image/ jpeg", :disposition => "inline", :filename => "scaledkids.jpg"
