the patch number to return data for
the corner number to return data for
return value for red component of color, or NULL
return value for green component of color, or NULL
return value for blue component of color, or NULL
return value for alpha component of color, or NULL
CAIRO_STATUS_SUCCESS, or CAIRO_STATUS_INVALID_INDEX if patch_num or corner_num is not valid for pattern. If pattern is not a mesh pattern, CAIRO_STATUS_PATTERN_TYPE_MISMATCH is returned.
Gets the color information in corner corner_num of patch patch_num for a mesh pattern. patch_num can range 0 to 1 less than the number returned by MeshPattern.getPatchCount. Valid values for corner_num are from 0 to 3 and identify the corners as explained in Pattern.createMesh. Since 1.12