pdf.py 文件源码

def mergeRotatedScaledPage(self, page2, rotation, scale):
        rotation = math.radians(rotation)
        rotating = [[math.cos(rotation), math.sin(rotation),0],
                    [-math.sin(rotation),math.cos(rotation), 0],
                    [0,                  0,                  1]]
        scaling = [[scale,0,    0],
                   [0,    scale,0],
                   [0,    0,    1]]
        ctm = utils.matrixMultiply(rotating, scaling)

        return self.mergeTransformedPage(page2,
                                         [ctm[0][0], ctm[0][1],
                                          ctm[1][0], ctm[1][1],
                                          ctm[2][0], ctm[2][1]])

    ##
    # This is similar to mergePage, but the stream to be merged is translated
    # and scaled by appling a transformation matrix.
    #
    # @param page2 An instance of {@link #PageObject PageObject} to be merged.
    # @param scale The scaling factor
    # @param tx    The translation on X axis
    # @param tx    The translation on Y axis