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- /* Copyright (C) 1989, 1990 Aladdin Enterprises. All rights reserved.
- Distributed by Free Software Foundation, Inc.
-
- This file is part of Ghostscript.
-
- Ghostscript is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
- to anyone for the consequences of using it or for whether it serves any
- particular purpose or works at all, unless he says so in writing. Refer
- to the Ghostscript General Public License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- Ghostscript, but only under the conditions described in the Ghostscript
- General Public License. A copy of this license is supposed to have been
- given to you along with Ghostscript so you can know your rights and
- responsibilities. It should be in a file named COPYING. Among other
- things, the copyright notice and this notice must be preserved on all
- copies. */
-
- /* gxmatrix.h */
- /* Internal matrix routines for GhostScript library */
- #include "gsmatrix.h"
-
- /* A matrix with a cached fixed-point copy of the translation. */
- /* This is only used by a few routines; they are responsible */
- /* for ensuring the validity of the cache. */
- typedef struct gs_matrix_fixed_s {
- _matrix_body;
- fixed tx_fixed, ty_fixed;
- } gs_matrix_fixed;
- #define update_matrix_fixed(mat)\
- (mat).tx_fixed = float2fixed((mat).tx),\
- (mat).ty_fixed = float2fixed((mat).ty)\
-
- /* Coordinate transformations to fixed point */
- int gs_point_transform2fixed(P4(gs_matrix_fixed *, floatp, floatp, gs_fixed_point *)),
- gs_distance_transform2fixed(P4(gs_matrix_fixed *, floatp, floatp, gs_fixed_point *));
-
- /* Macro for testing whether matrix coefficients are zero, */
- /* for shortcuts when the matrix has no skew. */
- #define is_skewed(pmat) !is_fzero2((pmat)->xy, (pmat)->yx)
-