da.mihi.sis.bubulae.frustrum.assae.solana.tuberosa.in.modo.gallico.fricta.ac.quassum.lactatum.coagulatum.cras...@imagemagick.org wrote: >> does the pixel cache expand to accommodate the "virtual" area? >> > > Yes, but based on scanline size, not image area. > > Pixels resource consumption is relative to the area of the image. > There are additional memory requirements to support N number of scanlines > where N is the number of threads available to ImageMagick if its OpenMP > enabled times the number of scanlines you request. Let's assume OpenMP is > enabled for up to 4 threads. Let's also assume our image is 1000x1000. > Finally assume you want virtual pixels at -100 to 1100 for two scanlines. > Here, ImageMagick consumes 1000x1000 pixels + 4 * 2 * 1200 which each pixel > is sizeof(PixelPacket) bytes. You eliminate the image area memory > requirement if you cache pixels to disk (e.g. MAGICK_AREA_LIMIT). >
Thanks for your timely response. That explains where huge chunks of memory are being used. Would the use of DrawPushClipPath() and creating a rectangle all the way around my image prevent the pixel cache from being expanded when I start drawing, or do I need to clip the lines at the image boundary myself ? Thanks Again, Larry _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
