cairo-cairo-matrix-t: cairo_matrix_t
Description
Generic matrix operationsMethods and Functions
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)Detailed Description
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.References
http://www.cairographics.org/manual/cairo-cairo-matrix-t.html