merritt@max.u.washington.edu (02/01/91)
Please reply via Email; in desparation I am posting to groups which I don't normally read! Plea: I have just gotten a DECstation 5000/200PXG up and [sort of] running, but have run into a blank wall when it comes to using it for displaying images (which is after all what I bought it for!). Can anyone out there help with the following questions? Major problem: - This is a 24 plane display with Z-buffer, but I can't for the life of me find a demo/example/code_fragment/writeup/whatever that shows me how to get a true color (24bit) picture up on the screen. I.e., I want to specify 8 bits of red, 8 bits of green, and 8 bits of blue for each pixel in a window directly (no color maps). Eventually I will be writing applications code which needs to display such pictures, but for the moment I'd settle for looking at images I've created on an IRIS and stored in a binary file (I can dump in a number of formats, including sun rasterfiles). Surely there's a utility equivalent to ipaste on the IRIS????? - The manual pages for the X11 utilities all speak explicitly of colormaps, which I do NOT want to use. The xdpyinfo utility reports that my display has depth of 24 bits (correct) and lists "visuals" with classes DirectColor and TrueColor, but even these are listed as having a colormap size of 256. This doesn't seem right, and anyway none of the X library routines which I can find in the documentation seem of any help when it comes to describing individual pixels. Are these in the X3D-PEX extensions - and if so is there any documentation anywhere for what and where they are? - Maybe this has to be done outside of X altogether? But then where do I start? Less major problems: - The DEC postscript viewer dxpsview fails on every postscript file I have tried with the X error: "BadAlloc (insufficient resources for operation) opcode 53 (X_CreatePixmap)" I get the same error on other DECstations (5000/200PX) as well. Is this a bug in the Ultrix 4.1 release? Is there a work-around (maybe another more generic X-based postscript viewer)? - I was quite taken aback to find that the 19" Sony monitor has two dark horizontal lines across it (about 1/3 and 2/3 of the way down the screen). I thought this was a hardware problem, but after a visit from the field service people I was told "They're all like that. That's what makes the Sony monitors so good - they use those lines to keep the electron beam precisely in register"! Am I the only one in the world to be disturbed by extra lines across my screen? And what about taking photos from the screen (I can't afford a separate film recorder) - who wants extra horizontal lines on what's supposed to be a high-resolution 24-bit color presentation slide? Anyone have any comments on this - like should I give up on it or try to make DEC find me a monitor without the extra lines? thanks for anything you can offer, Ethan A Merritt -------------------------------------------------------------------------------- Dept of Biological Structure H510 Health Sciences University of Washington SM-20 (206)543-8865 Seattle, WA 98195 merritt@u.washington.edu --------------------------------------------------------------------------------