Now this is also available, very fast, with the same speed, for LC 6/7/8/9 on Mac using Canvas2d in a revBrowser instance (on Win revBrowser doesn't support Canvas2d) in LC-ImageToolBox-67: Basics.
Get it via "Sample Stacks" of the LC-Toolbar or from http://livecodeshare.runrev.com/stack/827/LCImageToolBox67%3A-Basics-v102 Somehow I missed the possibility of LC 6/7's revBrowser to use Canvas2D on Mac until now, the gain in speed compared to 'ordinary' LCScript is terrific. Just try in LC 7! It was Jonathan's transform-demo for the browser widget that opened my eyes. Thanks again for that example, Jonathan. There's still a fast working solution for linux missing and for Raspi (which sadly inherits the linux bugs with web browssing). Within the next weeks I will publish LC-ImageToolBox-JIT for that (uses luaJIT), I have it already running. > hh wrote: > Today I implemented this as part of LC-ImageToolBox-89: Basics. > Get it _from LC 8/9_ via "Sample Stacks" of the LC-Toolbar or from > > http://livecodeshare.runrev.com/stack/826/LC-ImageToolBox89%3A-Basics-v102 > > Uses Canvas2D (no webGL because of issues with some graphic cards) > in a hidden browser widget. Your method gives nice Effects and works > with a decent graphic card pretty fast. Needs here with LC 8/9 on a > Mac mini 2.5 GHz/IntelHD4000 for a 1920x1080 image < 500 millisecs. > >> Peter R. wrote: >> I've got an app that allows the user to display an image using a >> variable number of colours (2-24 colours). In addition, the user >> can specify upper and lower thresholds so that all pixels below a >> specified value are displayed using a colour such as black and all >> pixels with values above a specified value are displayed using a >> colour such as red. >> Pixels with values between the thresholds are displayed using the >> specified colour range of 2-24 colours. The images can consist of >> up to 8-10 million pixels, they are rectangular and can be in a >> landscape or portrait orientation. >> >> Whilst I have this working the code that manages the changing of >> the number and use of colours in an image is rather slow. This is >> despite me using the "repeat for each" loop structure and lock the >> screen wherever possible to get the maximum speed! >> >> Does anyone have any clever algorithms, code, add-ons, etc that can >> do this kind of thing in a flash?! _______________________________________________ use-livecode mailing list email@example.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode