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Java Forum / General / February 2007Embed a small image in code
Hi, I want to display a 16x16 image in my application/applet and I don't want to deal with jars/urls/resources/etc. Is there a way to embed an image in code in some ascii format and then display it? Thanks! Aaron Fude On Feb 24, 5:07 am, aaronf...@gmail.com wrote: ... > I want to display a 16x16 image in my application/applet and I don't > want to deal with jars/urls/resources/etc. Is there a way to embed an > image in code in some ascii format and then display it? Wow! You apparently missed last year's 'sensible' discussion on this. <http://groups.google.com/group/comp.lang.java.programmer/browse_frm/ thread/2e03cd2160451bb0/beec9e133ed935b4?#beec9e133ed935b4> What more could be added? Andrew T. > What more could be added? If you wanted to spoil me, a short summary of the bottom line! > Andrew T. On Feb 24, 5:31 am, aaronf...@gmail.com wrote: > > What more could be added? > > If you wanted to spoil me, a short summary of the bottom line! "Don't" Andrew T. > Wow! You apparently missed last year's > 'sensible' discussion on this. > <http://groups.google.com/group/comp.lang.java.programmer/browse_frm/ > thread/2e03cd2160451bb0/beec9e133ed935b4?#beec9e133ed935b4> Ah, sweet memories... :-) > Hi, > > I want to display a 16x16 image in my application/applet and I don't > want to deal with jars/urls/resources/etc. Is there a way to embed an > image in code in some ascii format and then display it? How about storing each pixel colour in an 16x16 array of int (or a 16x16x3 array of byte)? - Oliver In C++ I could do this: #define test_width 16 #define test_height 7 static char test_bits[] = { 0x13, 0x00, 0x15, 0x00, 0x93, 0xcd, 0x55, 0xa5, 0x93, 0xc5, 0x00, 0x80, 0x00, 0x60, }; Is there an equivalent in Java? Thanks. aaronfude@gmail.com schrieb: > In C++ I could do this: > [quoted text clipped - 8 lines] > > Thanks. private static final byte[] test_bits = new byte[]{ 0x13, 0x00, 0x15, 0x00, 0x93, 0xcd, 0x55, 0xa5, 0x93, 0xc5, 0x00,0x80,0x00, 0x60 }; ? thats what you want? > In C++ I could do this: > [quoted text clipped - 6 lines] > > Is there an equivalent in Java? public final class MyEmbeddedImage { final public static int WIDTH = 16; final public static int HEIGHT = 7; final public static byte[] = {0x13, 0x00, 0x15, 0x00, 0x93, 0xcd, 0x55, 0xa5, 0x93, 0xc5, 0x00, 0x80, 0x00, 0x60, }; } Though it's not clear to me the relationship between your chars/bytes and your height and width. The number of elements in the array (14) certainly does not seem to equate with 16x7. - Oliver > <aaronf...@gmail.com> wrote in message > [quoted text clipped - 18 lines] > > } Then what would be the command for displaying this image in a JPanel (assuming I fix the dimensions if they are wrong)? >> <aaronf...@gmail.com> wrote in message >> [quoted text clipped - 16 lines] >> final public static byte[] = {0x13, 0x00, 0x15, 0x00, 0x93, 0xcd, >> 0x55, Note I forgot to put the name of the variable here, so this line should read: final public static byte[] test_bits = {0x13, 0x00, 0x15, 0x00, 0x93, 0xcd, 0x55, >> 0xa5, 0x93, 0xc5, 0x00, 0x80, 0x00, 0x60, }; >> >> } > > Then what would be the command for displaying this image in a JPanel > (assuming I fix the dimensions if they are wrong)? Well, I have no idea what format you're using for encoding the image as a sequence of bytes. Is this a greyscale image with 256 intensities, and each byte represents such an intensity? Assuming that's the case, it'd probably look something like this: int xOffSet, yOffset; /*initialize these somehow, depending on where you want the image drawn*/ Graphics g = /*get this somehow, probably passed into your paint method by the Swing API*/; for (int i = 0; i < test_bits.length; i++) { int x = i % MyEmbeddedImage.WIDTH; int y = i / MyEmbeddedImage.WIDTH; int intensity = MyEmbeddedImage.test_bits[i]; g.setColor(new Color(intensity, intensity, intensity)); g.fillRect(x + xOffSet, y + yOffset, 1, 1); } You might want to draw this image once, store it in some sort of buffer, and then use the Graphics.copyImage() method to copy from it onto the actual image associated with the JFrame. - Oliver > <aaronf...@gmail.com> wrote in message > [quoted text clipped - 24 lines] > > - Oliver It does if you count bits, rather than bytes. That said, there aren't many facilities to load such a bitmap directly into an Image that I know of; you'd have to write at least a small amount of loader code to translate it into raster data or Graphics draw operations. På Fri, 23 Feb 2007 19:47:59 +0100, skrev <aaronfude@gmail.com>: > In C++ I could do this: > [quoted text clipped - 6 lines] > > Is there an equivalent in Java? Not really, because Java does not have a data segment. So you *could* create such an array in Java, but when compiled it would consist of a sequence of statements that built up an array by adding the elements one by one. And you would still need code (using BufferedImage and WritableRaster) to turn that bitmap data into an image. Using file/classpath resources is the way to go - why do you want to avoid it? > Hi, > [quoted text clipped - 5 lines] > > Aaron Fude There are two very simple ways, look at BufferedImage.setRGB() and the MemoryImageSource class. The other way depending on how complicated your image is is to just draw it. Create a 16x16 BufferedImage and get a Graphics for it and draw on it. I think it is actually easier to embed it into a jar or get it from your website or something but have at it.  SignatureKnute Johnson email s/nospam/knute/ Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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