10-13-2011
Looking For the Best Way to Rotate an Image: JavaScript, PHP, HTML etc
Hey All,
What I'm looking for is a way to rotate an image by non 90 degree angles (ie 90, 180, 270, 360). I am able to do it in PHP, but there are errors in the image, some pixels end up colored incorrectly and the image ends up resized and I lose transparency. I've done my share of searching on Google and now I'm looking for a real solution. The icon that I'm trying to rotate is being generated in PHP, so a means of transforming the coordinates used in creating the image would work as well. Just wondering if there is a more reliable way of rotating an image (its a simple icon on a transparent background) in JavaScript or PHP or Perl or whatever. Ideally, just need to be able to send a query string to a web page so I can dynamically create and rotate an image by n degrees.
Any help will be appreciated.
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LEARN ABOUT SUNOS
mlib_imagerotate180_fp
mlib_ImageRotate180_Fp(3MLIB) mediaLib Library Functions mlib_ImageRotate180_Fp(3MLIB)
NAME
mlib_ImageRotate180_Fp - rotate an image by 180 degrees
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageRotate180_Fp(mlib_image *dst, const mlib_image *src);
DESCRIPTION
Rotate a floating-point image 180 degrees.
The width and height of the destination image can be different from the width and height of the source image. The center of the source
image is mapped to the center of the destination image.
PARAMETERS
The function takes the following arguments:
dst Pointer to destination image.
src Pointer to source image.
RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
mlib_ImageFlipAntiDiag(3MLIB), mlib_ImageFlipAntiDiag_Fp(3MLIB), mlib_ImageFlipMainDiag(3MLIB), mlib_ImageFlipMainDiag_Fp(3MLIB),
mlib_ImageFlipX(3MLIB), mlib_ImageFlipX_Fp(3MLIB), mlib_ImageFlipY(3MLIB), mlib_ImageFlipY_Fp(3MLIB), mlib_ImageRotate90(3MLIB),
mlib_ImageRotate90_Fp(3MLIB), mlib_ImageRotate180(3MLIB), mlib_ImageRotate270(3MLIB), mlib_ImageRotate270_Fp(3MLIB), attributes(5)
SunOS 5.10 9 Nov 2004 mlib_ImageRotate180_Fp(3MLIB)