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Topic: Save sketch to JPEG/PNG (Read 9171 times) |
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Martin
    
 
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Save sketch to JPEG/PNG
« on: Oct 21st, 2003, 3:29pm » |
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Should save the sketch into a JPEG file can also save into PNG. It's partially working but I can't seem to grab the sketch image ... Koenie is working on this one. I wonder if anyone can beat him to it. hehe. (Excluding the P5 Dev Team)
Code:
// SaveJPEG
import java.applet.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.text.*;
import java.util.*;
import java.util.zip.*;
import javax.imageio.*;
public class SaveJPEG extends BApplet
{
RenderedImage rendImage;
void setup()
{
size(200,200);
background(255);
stroke(255);
line( 0, 0, 80, 80 );
}
void draw()
{
rendImage = creator();
try
{
File file = new File("newimage.png");
ImageIO.write(rendImage, "png", file);
file = new File("newimage.jpg");
ImageIO.write(rendImage, "jpg", file);
}
catch (IOException e)
{
}
}
RenderedImage creator()
{
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
// Graphics mg = bufferedImage.getGraphics();
// Graphics m = super.getGraphics();
// m = bufferedImage.getGraphics();
Graphics m = bufferedImage.getGraphics();
// m. drawstuff ...
m.dispose();
return bufferedImage;
}
}
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Note: This is a VERY rough way to do things hehe.
Hint: pixels[] is nice.
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| « Last Edit: Oct 21st, 2003, 3:31pm by Martin » |
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Koenie
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Re: Save sketch to JPEG/PNG
« Reply #1 on: Oct 21st, 2003, 3:50pm » |
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Code:import java.applet.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.text.*;
import java.util.*;
import java.util.zip.*;
import javax.imageio.*;
public class SaveJPEG extends BApplet {
void setup() {
size(200,200);
background(255);
// draws some funky stuff on the screen
stroke(0); line(0, 0, 80, 80);
noStroke(); fill(0, 255, 0); ellipse(10, 10, 40, 40);
}
RenderedImage rendImage; // image to render to
void draw() {
rendImage = creator();
try {
File file = new File("newimage.png");
ImageIO.write(rendImage, "png", file); // saves to PNG
file = new File("newimage.jpg");
ImageIO.write(rendImage, "jpg", file); // saves to JPG
}
catch (IOException e) {}
}
RenderedImage creator() {
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics m = bufferedImage.getGraphics();
// copies all pixels to the new Graphics object
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
m.setColor(new Color(pixels[j*width+i]));
m.drawLine(i, j, i, j);
}
}
m.dispose(); // don't know what this is for...
return bufferedImage;
}
}
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Koenie
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http://koeniedesign.com
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Martin
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Re: Save sketch to JPEG/PNG
« Reply #2 on: Oct 21st, 2003, 4:00pm » |
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good.  m.dispose() is to 'throw away' the Graphics object that we created so that some system resources used by it may be freed up.
now, since javax.imageio isn't imported by processing, we'd want to use another way to deal with exporting to jpeg/png files.
(coding right now ... will edit this post in a while)
koenie: to do ... make it more flexible. 
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| « Last Edit: Oct 21st, 2003, 4:03pm by Martin » |
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Martin
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Re: Save sketch to JPEG/PNG
« Reply #3 on: Oct 21st, 2003, 4:18pm » |
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here... no more java mode.
Code:
void setup()
{
size(200,200);
background(255);
// draws some funky stuff on the screen
stroke(0); line(0, 0, 80, 80);
noStroke(); fill(0, 255, 0); ellipse(10, 10, 40, 40);
}
RenderedImage rendImage; // image to render to
BufferedImage backBuffer;
void draw()
{
rendImage = creator();
write("koenie.jpg");
}
RenderedImage creator()
{
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics m = bufferedImage.getGraphics();
// copies all pixels to the new Graphics object
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
m.setColor(new Color(pixels[j*width+i]));
m.drawLine(i, j, i, j);
}
}
m.dispose(); // don't know what this is for...
return bufferedImage;
}
void write( String fileName )
{
backBuffer = (BufferedImage) rendImage;
try
{
BufferedOutputStream bos = new BufferedOutputStream( new FileOutputStream( fileName ));
com.sun.image.codec.jpeg.JPEGImageEncoder encoder = com.sun.image.codec.jpeg.JPEGCodec.createJPEGEncoder( bos );
com.sun.image.codec.jpeg.JPEGEncodeParam jep = encoder.getDefaultJPEGEncodeParam( backBuffer );
jep.setQuality( 1.0f, false );
encoder.setJPEGEncodeParam( jep );
encoder.encode( backBuffer );
bos.close();
}
catch ( Exception e )
{
e.printStackTrace();
}
}
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Koenie
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Re: Save sketch to JPEG/PNG
« Reply #4 on: Oct 21st, 2003, 4:31pm » |
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and the programs goes shorter and shorter.
this code uses the function saveToJPG("filename.jpg")
Code:void setup() {
size(200,200);
background(255);
// draws some funky stuff on the screen
stroke(0); line(0, 0, 80, 80);
noStroke(); fill(0, 255, 0); ellipse(10, 10, 40, 40);
}
void draw() {
saveToJPG("koenie.jpg");
}
void saveToJPG(String fileName) { // oh, how we love compact coding
BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics m = img.getGraphics();
for (int i = 0; i < width; i++) {for (int j = 0; j < height; j++) {m.setColor(new Color(pixels[j*width+i])); m.drawLine(i, j, i, j);}}
m.dispose(); try {BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(fileName));
com.sun.image.codec.jpeg.JPEGImageEncoder encoder = com.sun.image.codec.jpeg.JPEGCodec.createJPEGEncoder(bos);
com.sun.image.codec.jpeg.JPEGEncodeParam jep = encoder.getDefaultJPEGEncodeParam(img);
jep.setQuality(1.0f, false); encoder.setJPEGEncodeParam(jep); encoder.encode(img); bos.close();
} catch ( Exception e ) {}
}
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Koenie
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http://koeniedesign.com
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Martin
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Re: Save sketch to JPEG/PNG
« Reply #5 on: Oct 21st, 2003, 4:39pm » |
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good good. now we should move on and do the direct translation (w/o having to drawline) by using an offscreen graphics object.
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Martin
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Re: Save sketch to JPEG/PNG
« Reply #6 on: Oct 22nd, 2003, 2:47am » |
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hehe. btw koenie, it's better to have longer human-readable code rather than have short/compact obfuscated code.
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benelek
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Re: Save sketch to JPEG/PNG
« Reply #7 on: Oct 22nd, 2003, 2:56am » |
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hey, obfuscation rocks! the problem is that the bboard tends to wrap the long lines of code, making it harder to tell when new lines start
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Martin
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Re: Save sketch to JPEG/PNG
« Reply #8 on: Oct 22nd, 2003, 3:27am » |
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benelek: Haha! In that case, link your code!
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Martin
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Re: Save sketch to JPEG/PNG
« Reply #10 on: Oct 22nd, 2003, 4:21am » |
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javax.imageio is of course available only in 1.4 and not in 1.3. while, com.sun.image is already available in 1.3. we revolve around this.
http://decode.ateneo.edu/martin/SaveJPEGPNG2.pde
er... how about 1.5 and up? will implement this later as we don't know what's in store for us come 1.5 (bloat bloat bloat!) 
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arielm
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Re: Save sketch to JPEG/PNG
« Reply #11 on: Oct 22nd, 2003, 11:32am » |
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martin, after looking into the code: why using a loop with "drawLine(i,j,i,j)" when BufferedImage gives you the 2 following methods?:
setRGB(int x, int y, int rgb)
Sets a pixel in this BufferedImage to the specified RGB value.
setRGB(int startX, int startY, int w, int h, int[] rgbArray, int offset, int scansize)
Sets an array of integer pixels in the default RGB color model (TYPE_INT_ARGB) and default sRGB color space, into a portion of the image data.
the first method will surely work, but still require a loop iterating over all the pixels,
while the second should take care of it in a blast, providing the correct parameters (+ creating your BufferedImage with TYPE_INT_ARGB which is the format of Bagel's pixels)
hth
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Ariel Malka | www.chronotext.org
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Martin
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Re: Save sketch to JPEG/PNG
« Reply #12 on: Oct 22nd, 2003, 1:14pm » |
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hi ariel,
'twas koenie's creative idea! (but hey, it works! ) hehe the first method goes kazooks when doing jpeg. as for the second method, which one's rgbArray[]? could do this by getRGB but which?
thanks,
martin
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arielm
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Re: Save sketch to JPEG/PNG
« Reply #13 on: Oct 22nd, 2003, 3:36pm » |
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i think the requested array is simply bagel's pixels[]...
concerning the other parameters, i guess:
"startX", "startY" and "offset" should be 0,
"w" and "scansize" should be equal to bagel's width
and finally, "h" should be equal to bagel's height
well, all this is not tested, and probably won't work so easily
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Ariel Malka | www.chronotext.org
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