x translation
1st component of the transformation matrix
2nd component of the transformation matrix
y translation
3rd component of the transformation matrix
4th component of the transformation matrix
Free a PangoMatrix.
Returns the scale factor of a matrix on the height of the font.
That is, the scale factor in the direction perpendicular to the
vector that the X coordinate is mapped to. If the scale in the X
coordinate is needed as well, use [methodPango.Matrix.get_font_scale_factors].
Calculates the scale factor of a matrix on the width and height of the font.
That is, xscale is the scale factor in the direction of the X coordinate,
and yscale is the scale factor in the direction perpendicular to the
vector that the X coordinate is mapped to.
Note that output numbers will always be non-negative.
Gets the slant ratio of a matrix.
For a simple shear matrix in the form:
1 λ
0 1
this is simply λ.
Changes the transformation represented by matrix to be the
transformation given by first rotating by degrees degrees
counter-clockwise then applying the original transformation.
degrees to rotate counter-clockwise
Changes the transformation represented by matrix to be the
transformation given by first scaling by sx in the X direction
and sy in the Y direction then applying the original
transformation.
amount to scale by in X direction
amount to scale by in Y direction
Transforms the distance vector (dx,``dy) by matrix.
This is similar to [methodPango.Matrix.transform_point],
except that the translation components of the transformation
are ignored. The calculation of the returned vector is as follows:
dx2 = dx1 * xx + dy1 * xy;
dy2 = dx1 * yx + dy1 * yy;
Affine transformations are position invariant, so the same vector
always transforms to the same vector. If (x1,y1) transforms
to (x2,y2) then (x1+dx1,y1+dy1) will transform to
(x1+dx2,y1+dy2) for all values of x1 and x2.
in/out X component of a distance vector
in/out Y component of a distance vector
First transforms the rect using matrix, then calculates the bounding box
of the transformed rectangle.
This function is useful for example when you want to draw a rotated
PangoLayout to an image buffer, and want to know how large the image
should be and how much you should shift the layout when rendering.
For better accuracy, you should use [methodPango.Matrix.transform_rectangle]
on original rectangle in Pango units and convert to pixels afterward
using [funcextents_to_pixels]'s first argument.
Transforms the point (x, y) by matrix.
in/out X position
in/out Y position
First transforms rect using matrix, then calculates the bounding box
of the transformed rectangle.
This function is useful for example when you want to draw a rotated
PangoLayout to an image buffer, and want to know how large the image
should be and how much you should shift the layout when rendering.
If you have a rectangle in device units (pixels), use
[methodPango.Matrix.transform_pixel_rectangle].
If you have the rectangle in Pango units and want to convert to transformed pixel bounding box, it is more accurate to transform it first (using this function) and pass the result to pango_extents_to_pixels(), first argument, for an inclusive rounded rectangle. However, there are valid reasons that you may want to convert to pixels first and then transform, for example when the transformed coordinates may overflow in Pango units (large matrix translation for example).
Changes the transformation represented by matrix to be the
transformation given by first translating by (tx, ty)
then applying the original transformation.
amount to translate in the X direction
amount to translate in the Y direction
A
PangoMatrixspecifies a transformation between user-space and device coordinates.The transformation is given by