PgMatrix

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;

Constructors

this
this(PangoMatrix* pangoMatrix, bool ownedRef)

Sets our main struct and passes it to the parent class.

Destructor

~this
~this()
Undocumented in source.

Members

Functions

concat
void concat(PgMatrix newMatrix)

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

copy
PgMatrix copy()

Copies a PangoMatrix.

free
void free()

Free a PangoMatrix.

getFontScaleFactor
double getFontScaleFactor()

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

getFontScaleFactors
void getFontScaleFactors(double xscale, double yscale)

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

getPgMatrixStruct
PangoMatrix* getPgMatrixStruct(bool transferOwnership)

Get the main Gtk struct

getStruct
void* getStruct()

the main Gtk struct as a void*

rotate
void rotate(double degrees)

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

scale
void scale(double scaleX, double scaleY)

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.

transformDistance
void transformDistance(double dx, double dy)

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

transformPixelRectangle
void transformPixelRectangle(PangoRectangle rect)

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

transformPoint
void transformPoint(double x, double y)

Transforms the point (@x, @y) by @matrix.

transformRectangle
void transformRectangle(PangoRectangle rect)

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

translate
void translate(double tx, double ty)

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

Properties

x0
double x0 [@property getter]
double x0 [@property setter]

x translation

xx
double xx [@property getter]
double xx [@property setter]

1st component of the transformation matrix

xy
double xy [@property getter]
double xy [@property setter]

2nd component of the transformation matrix

y0
double y0 [@property getter]
double y0 [@property setter]

y translation

yx
double yx [@property getter]
double yx [@property setter]

3rd component of the transformation matrix

yy
double yy [@property getter]
double yy [@property setter]

4th component of the transformation matrix

Static functions

extentsToPixels
void extentsToPixels(PangoRectangle* inclusive, PangoRectangle* nearest)

Converts extents from Pango units to device units.

getType
GType getType()
unitsFromDouble
int unitsFromDouble(double d)

Converts a floating-point number to Pango units.

unitsToDouble
double unitsToDouble(int i)

Converts a number in Pango units to floating-point.

Variables

ownedRef
bool ownedRef;
Undocumented in source.
pangoMatrix
PangoMatrix* pangoMatrix;

the main Gtk struct

Meta