1c9d8fd0aSAndrzej BialeckiWarsaw, 1998.08.18 2c9d8fd0aSAndrzej Bialecki 3c9d8fd0aSAndrzej Bialecki VIEW - small PNG viewer 4c9d8fd0aSAndrzej Bialecki ----------------------- 5c9d8fd0aSAndrzej Bialecki 6c9d8fd0aSAndrzej BialeckiThis program is intended to serve as a simple console viewer for PNG 7c9d8fd0aSAndrzej Bialeckigraphics. It also features some scripting abilities, which allow you to 8c9d8fd0aSAndrzej Bialeckibuild simple presentation. 9c9d8fd0aSAndrzej Bialecki 10c9d8fd0aSAndrzej BialeckiIn fact, using even this initial version I was able to build a nice 11c9d8fd0aSAndrzej Bialeckipresentation of PicoBSD abilities which I used in real-life situation (you 12c9d8fd0aSAndrzej Bialeckican see for yourself one of the presentation's screens, fbsd.png). 13c9d8fd0aSAndrzej Bialecki 14c9d8fd0aSAndrzej BialeckiThe audience was impressed :-), especially when I asked them politely what 15c9d8fd0aSAndrzej Bialeckiare requirements and cost to make that kind of presentation using M$ 16c9d8fd0aSAndrzej Bialeckiproducts... 17c9d8fd0aSAndrzej Bialecki 18c9d8fd0aSAndrzej BialeckiSimple Viewing 19c9d8fd0aSAndrzej Bialecki-------------- 20c9d8fd0aSAndrzej Bialecki 21c9d8fd0aSAndrzej BialeckiUsage is as follows: 22c9d8fd0aSAndrzej Bialecki 23c9d8fd0aSAndrzej Bialecki view [-g nnn.nnn] [-r x] filename.png 24c9d8fd0aSAndrzej Bialecki 25c9d8fd0aSAndrzej Bialeckiwhere 26c9d8fd0aSAndrzej Bialecki -g nnn.nnn screen gamma (you can adjust how bright is the 27c9d8fd0aSAndrzej Bialecki picture) 28c9d8fd0aSAndrzej Bialecki -r x resolution: 29c9d8fd0aSAndrzej Bialecki 0 - 640x480x16 30c9d8fd0aSAndrzej Bialecki 1 - 640x200x256 31c9d8fd0aSAndrzej Bialecki 2 - 320x240x256 32c9d8fd0aSAndrzej Bialecki 33c9d8fd0aSAndrzej BialeckiUnder right mouse button you can find a simple menu, which tells you also 34c9d8fd0aSAndrzej Bialeckithe hotkeys. You can shift, rotate and zoom the picture. 35c9d8fd0aSAndrzej Bialecki 36c9d8fd0aSAndrzej BialeckiPresentation 37c9d8fd0aSAndrzej Bialecki------------ 38c9d8fd0aSAndrzej Bialecki 39c9d8fd0aSAndrzej BialeckiUsage is as above, but the file you give as argument is a (unix) text file 40c9d8fd0aSAndrzej Bialeckiof the following format: 41c9d8fd0aSAndrzej Bialecki 42c9d8fd0aSAndrzej Bialecki 1 VIEW SCRIPT 43c9d8fd0aSAndrzej Bialecki 2 5 44c9d8fd0aSAndrzej Bialecki 3 welcome.png 45c9d8fd0aSAndrzej Bialecki 4 /home/clipart/logo.png 46c9d8fd0aSAndrzej Bialecki 5 /home/present/title.png 47c9d8fd0aSAndrzej Bialecki 6 /home/present/outline.png 48c9d8fd0aSAndrzej Bialecki 7 /home/present/end.png 49c9d8fd0aSAndrzej Bialecki 50c9d8fd0aSAndrzej Bialecki(of course without the line numbering or the leading space!). The line number 51c9d8fd0aSAndrzej Bialecki1 is magic, and must be present in order to recognize the file properly. 52c9d8fd0aSAndrzej Bialecki 53c9d8fd0aSAndrzej BialeckiThe second line tells how many pictures consist the presentation. The 54c9d8fd0aSAndrzej Bialeckifollowing lines tell the file names containing the images themselves. 55c9d8fd0aSAndrzej Bialecki 56c9d8fd0aSAndrzej BialeckiSee the example in file picobsd.vu. 57c9d8fd0aSAndrzej Bialecki 58c9d8fd0aSAndrzej BialeckiCommand line arguments (gamma and resolution) are as above. You can also use 59c9d8fd0aSAndrzej Bialeckithe pop-up menu to adjust image parameters, as well as go forward or 60c9d8fd0aSAndrzej Bialeckibackward in the presentation. 61c9d8fd0aSAndrzej Bialecki 62c9d8fd0aSAndrzej BialeckiBugs, caveats, missing features 63c9d8fd0aSAndrzej Bialecki------------------------------- 64c9d8fd0aSAndrzej Bialecki 65c9d8fd0aSAndrzej Bialecki* there are some bugs in libvgl which require strange workarounds, and even 66c9d8fd0aSAndrzej Bialecki then it doesn't work quite right. See the source for the 'XXX' comments... 67c9d8fd0aSAndrzej Bialecki 68c9d8fd0aSAndrzej Bialecki* I didn't have time to add gamma adjustment to the pop-up menu. It's 69c9d8fd0aSAndrzej Bialecki simple, though, and I leave it as an exercise for the reader :-)) 70c9d8fd0aSAndrzej Bialecki 71c9d8fd0aSAndrzej Bialecki* it would be great if someone would add GIF and jpeg support. 72c9d8fd0aSAndrzej Bialecki 73c9d8fd0aSAndrzej Bialecki* the error checking is probably weak. A bad PNG file or script file will 74c9d8fd0aSAndrzej Bialecki probably cause a coredump. 75c9d8fd0aSAndrzej Bialecki 76c9d8fd0aSAndrzej Bialecki* pop-up menu facilities need more abstraction to be usable in other cases. 77c9d8fd0aSAndrzej Bialecki 78c9d8fd0aSAndrzej BialeckiAnyway, as it is even now it's quite usable. 79c9d8fd0aSAndrzej Bialecki 80c9d8fd0aSAndrzej BialeckiHave fun! 81c9d8fd0aSAndrzej Bialecki 82c9d8fd0aSAndrzej BialeckiAndrzej Bialecki 83c9d8fd0aSAndrzej Bialecki 84e0b7bc57SAndrzej Bialecki<[email protected]> 85c9d8fd0aSAndrzej Bialecki 86*97d92980SPeter Wemm$FreeBSD$ 87
