Is it bug in MagickRotateImage?

[Jacob]

Code: Select all

$rot_color = "#FFFFFF";
$degrees = 45;
MagickRotateImage($mw, NewPixelWand($rot_color), $degrees);

picture is 2.8MB 2304 x 3456 (8.0 MP) 24-bit color jpg not small but not super big.
procedure use 1GB in disc, 450MB in memory and after 15min it not finish.
Processor used 2-4%.
Is it bug or this picture over limits?

[magick]

Not a bug. ImageMagick is caching your image to disk which is 1000 times slower than in-memory image rotation. See http://magick.imagemagick.org/script/architecture.php for a discussion of the pixel cache.

[Jacob]

Thank you for this info, i miss it when try looking help.
I set MAGICK_DISK_LIMIT = 2GB MAGICK_MAP_LIMIT = 1500MB MAGICK_MEMORY_LIMIT = 800MB

Code: Select all

montage.exe -rotate "45" 2.jpg 3.jpg

work fine

[Jacob]

php script work too if set MagickSetResourceLimit (can't set it in php.ini? )
but small strange in architecture.php i see

if we have a 640 by 480 image and we're using the Q16 version of ImageMagick, the pixel cache consumes image width * height * bit-depth / 8 * channels bytes or approximately 2.3 megabytes (i.e. 640 * 480 * 2 * 4).

ok my picture is 2304 x 3456 (8.0 MP) 24-bit Q16 = 2304*3456*24/8*4=95.5MB
why it need 730MB memory to finish work?

[magick]

You have two images in memory, the original and the rotated. The rotated image is oversized until it is cropped.