BAffineTransform: de-virtualize some calls in flattening code

The Flatten and Unflatten method should check the size according to the
matching FlattenedSize method, not a possibly overriden version.

May also fix #14128 since we avoid use of the vtable by doing this.

Affine transforms: add method to test for dilation

* Add IsDilation() to BAffineTransform and Transformable which check
whether the transform is a dilation, i.e. consists of only
translation and/or scaling

* Allow to set the scale (versus multiplication with a scale).
* Added commented versions for translation, rotation and shear, which would
work similar.
* Added B_AFFINE_IDENTITY_TRANSFORM constant similar to B_ORIGIN.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36401 a95241bf-73f2-0310-859d-f6bbb57e9c96

Rewrote BAffineTransform to not be based on agg::trans_affine, which was pulling
in the AGG header. Reused the AGG code were applicable and implemented a lot
more features. The Multiply and PreMultiply meaning is reversed with respect to
AGG, but follows the mathematical meaning. Added type_code
B_AFFINE_TRANSFORM_TYPE to TypeConstants.h and let BAffineTransform derive from
BFlattenable.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35958 a95241bf-73f2-0310-859d-f6bbb57e9c96

Moved BAffineTransform from shared kit into interface kit. Still in BPrivate
namespace. Applied 80 char/line limit.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35955 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Allow to set the scale (versus multiplication with a scale).
* Added commented versions for translation, rotation and shear, which would
work similar.
* Added B_AFFINE_IDENTITY_TRANSFORM constant similar to B_ORIGIN.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36401 a95241bf-73f2-0310-859d-f6bbb57e9c96

Rewrote BAffineTransform to not be based on agg::trans_affine, which was pulling
in the AGG header. Reused the AGG code were applicable and implemented a lot
more features. The Multiply and PreMultiply meaning is reversed with respect to
AGG, but follows the mathematical meaning. Added type_code
B_AFFINE_TRANSFORM_TYPE to TypeConstants.h and let BAffineTransform derive from
BFlattenable.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35958 a95241bf-73f2-0310-859d-f6bbb57e9c96

Moved BAffineTransform from shared kit into interface kit. Still in BPrivate
namespace. Applied 80 char/line limit.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35955 a95241bf-73f2-0310-859d-f6bbb57e9c96