argb

I'm trying to create a X11 window with a bit depth of 32 so that I can use ARGB colors. Here's what I do: XVisualInfo vinfo; int depth = 32; XMatchVisualInfo(dpy, XDefaultScreen(dpy), depth, TrueColor, &vinfo); XCreateWindow(dpy, XDefaultRootWindow(dpy), 0, 0, 150, 100, 0, depth, InputOutput, vinfo.visual, 0, NULL); Here's what happens: X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 1 (X_CreateWindow) Serial number of failed request: 7 Current serial number in output stream: 7 Any pointers on why there is a BadMatch error? Havoc P The problem

I try to read an image from sdcard (in emulator) and then create a Bitmap image with the BitmapFactory.decodeByteArray method. I set the options: options.inPrefferedConfig = Bitmap.Config.ARGB_8888 options.inDither = false Then I extract the pixels into a ByteBuffer. ByteBuffer buffer = ByteBuffer.allocateDirect(width*height*4) bitmap.copyPixelsToBuffer(buffer) I use this ByteBuffer then in the JNI to convert it into RGB format and want to calculate on it. But always I get false data - I test without modifying the ByteBuffer. Only thing I do is to put it into the native method into JNI. Then

I am trying to access the raw data of a Bitmap in ARGB_8888 format on Android, using the copyPixelsToBuffer and copyPixelsFromBuffer methods. However, invocation of those calls seems to always apply the alpha channel to the rgb channels. I need the raw data in a byte[] or similar (to pass through JNI; yes, I know about bitmap.h in Android 2.2, cannot use that). Here is a sample: // Create 1x1 Bitmap with alpha channel, 8 bits per channel Bitmap one = Bitmap.createBitmap(1,1,Bitmap.Config.ARGB_8888); one.setPixel(0,0,0xef234567); Log.v("?","hasAlpha() = "+Boolean.toString(one.hasAlpha())); Log

I have a PNG file with transparency that is loaded and stored in a BufferedImage . I need this BufferedImage to be of TYPE_INT_ARGB . However, when I use getType() the returned value is 0 ( TYPE_CUSTOM ) instead of 2 ( TYPE_INT_ARGB ). This is how I load the .png : public File img = new File("imagen.png"); public BufferedImage buffImg = new BufferedImage(240, 240, BufferedImage.TYPE_INT_ARGB); try { buffImg = ImageIO.read(img ); } catch (IOException e) { } System.out.Println(buffImg.getType()); //Prints 0 instead of 2 How can I load the .png, save in the BufferedImage and make it TYPE_INT_ARGB

The colors in this table is all not transparent. I guess the value for the A is set to FF . What is the code for transparency? For example this color FFF0F8FF (AliceBlue), to a transparent code such as ??F0F8FF ? theHacker Transparency is controlled by the alpha channel ( AA in #AARRGGBB ). Maximal value (255 dec, FF hex) means fully opaque. Minimum value (0 dec, 00 hex) means fully transparent. Values in between are semi-transparent, i.e. the color is mixed with the background color. To get a fully transparent color set the alpha to zero. RR , GG and BB are irrelevant in this case because no