Struct

Pango.Matrix

Description [src]

struct PangoMatrix {
  double xx;
  double xy;
  double yx;
  double yy;
  double x0;
  double y0;
}

A PangoMatrix specifies a transformation between user-space and device coordinates.

The transformation is given by

x_device = x_user * matrix->xx + y_user * matrix->xy + matrix->x0;
y_device = x_user * matrix->yx + y_user * matrix->yy + matrix->y0;

Structure members

`xx`	1st component of the transformation matrix
`xy`	2nd component of the transformation matrix
`yx`	3rd component of the transformation matrix
`yy`	4th component of the transformation matrix
`x0`	x translation
`y0`	y translation

Instance methods

pango_matrix_concat

Changes the transformation represented by matrix to be the transformation given by first applying transformation given by new_matrix then applying the original transformation.

pango_matrix_copy

Copies a PangoMatrix.

pango_matrix_free

Free a PangoMatrix.

pango_matrix_get_font_scale_factor

Returns the scale factor of a matrix on the height of the font.

pango_matrix_get_font_scale_factors

Calculates the scale factor of a matrix on the width and height of the font.

pango_matrix_rotate

Changes the transformation represented by matrix to be the transformation given by first rotating by degrees degrees counter-clockwise then applying the original transformation.

pango_matrix_scale

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.

pango_matrix_transform_distance

Transforms the distance vector (dx,dy) by matrix.

pango_matrix_transform_pixel_rectangle

First transforms the rect using matrix, then calculates the bounding box of the transformed rectangle.

pango_matrix_transform_point

Transforms the point (x, y) by matrix.

pango_matrix_transform_rectangle

First transforms rect using matrix, then calculates the bounding box of the transformed rectangle.

pango_matrix_translate

Changes the transformation represented by matrix to be the transformation given by first translating by (tx, ty) then applying the original transformation.