cairoMatrixInit(xx, yx, xy, yy, x0, y0)
cairoMatrixInitIdentity()
cairoMatrixInitTranslate(tx, ty)
cairoMatrixInitScale(sx, sy)
cairoMatrixInitRotate(radians)
cairoMatrixTranslate(matrix, tx, ty)
cairoMatrixScale(matrix, sx, sy)
cairoMatrixRotate(matrix, radians)
cairoMatrixInvert(matrix)
cairoMatrixMultiply(result, a, b)
cairoMatrixTransformDistance(matrix, dx, dy)
cairoMatrixTransformPoint(matrix, x, y)CairoMatrix is used throughout cairo to convert between different
coordinate spaces. A CairoMatrix holds an affine transformation,
such as a scale, rotation, shear, or a combination of these.
The transformation of a point (x,y)
is given by:
x_new = xx * x + xy * y + x0;
y_new = yx * x + yy * y + y0;
The current transformation matrix of a Cairo, represented as a
CairoMatrix, defines the transformation from user-space
coordinates to device-space coordinates. See cairoGetMatrix and
cairoSetMatrix.