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Diffstat (limited to 'gs/src/gsmatrix.h')
| -rw-r--r-- | gs/src/gsmatrix.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/gs/src/gsmatrix.h b/gs/src/gsmatrix.h new file mode 100644 index 000000000..664373f93 --- /dev/null +++ b/gs/src/gsmatrix.h @@ -0,0 +1,75 @@ +/* Copyright (C) 1989, 1995, 1997 Aladdin Enterprises. All rights reserved. + + This file is part of Aladdin Ghostscript. + + Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author + or distributor accepts any responsibility for the consequences of using it, + or for whether it serves any particular purpose or works at all, unless he + or she says so in writing. Refer to the Aladdin Ghostscript Free Public + License (the "License") for full details. + + Every copy of Aladdin Ghostscript must include a copy of the License, + normally in a plain ASCII text file named PUBLIC. The License grants you + the right to copy, modify and redistribute Aladdin Ghostscript, but only + under certain conditions described in the License. Among other things, the + License requires that the copyright notice and this notice be preserved on + all copies. +*/ + +/* gsmatrix.h */ +/* Definition of matrices and client interface to matrix routines */ + +#ifndef gsmatrix_INCLUDED +# define gsmatrix_INCLUDED + +/* See p. 65 of the PostScript manual for the semantics of */ +/* transformation matrices. */ + +/* Structure for a transformation matrix. */ +#define _matrix_body\ + float xx, xy, yx, yy, tx, ty +struct gs_matrix_s { + _matrix_body; +}; +#ifndef gs_matrix_DEFINED +# define gs_matrix_DEFINED +typedef struct gs_matrix_s gs_matrix; +#endif +/* Macro for initializing constant matrices */ +#define constant_matrix_body(xx, xy, yx, yy, tx, ty)\ + (float)(xx), (float)(xy), (float)(yx),\ + (float)(yy), (float)(tx), (float)(ty) + +/* Macros for testing whether matrix coefficients are zero, */ +/* for shortcuts when the matrix is simple. */ +#define is_xxyy(pmat) is_fzero2((pmat)->xy, (pmat)->yx) +#define is_xyyx(pmat) is_fzero2((pmat)->xx, (pmat)->yy) + +/* The identity matrix (for structure initialization) */ +#define identity_matrix_body\ + constant_matrix_body(1, 0, 0, 1, 0, 0) + +/* Matrix creation */ +void gs_make_identity(P1(gs_matrix *)); +int gs_make_translation(P3(floatp, floatp, gs_matrix *)), + gs_make_scaling(P3(floatp, floatp, gs_matrix *)), + gs_make_rotation(P2(floatp, gs_matrix *)); + +/* Matrix arithmetic */ +int gs_matrix_multiply(P3(const gs_matrix *, const gs_matrix *, gs_matrix *)), + gs_matrix_invert(P2(const gs_matrix *, gs_matrix *)), + gs_matrix_translate(P4(const gs_matrix *, floatp, floatp, gs_matrix *)), + gs_matrix_scale(P4(const gs_matrix *, floatp, floatp, gs_matrix *)), + gs_matrix_rotate(P3(const gs_matrix *, floatp, gs_matrix *)); + +/* Coordinate transformation */ +int gs_point_transform(P4(floatp, floatp, const gs_matrix *, gs_point *)), + gs_point_transform_inverse(P4(floatp, floatp, const gs_matrix *, gs_point *)), + gs_distance_transform(P4(floatp, floatp, const gs_matrix *, gs_point *)), + gs_distance_transform_inverse(P4(floatp, floatp, const gs_matrix *, gs_point *)), + gs_points_bbox(P2(const gs_point [4], gs_rect *)), + gs_bbox_transform_only(P3(const gs_rect *, const gs_matrix *, gs_point [4])), + gs_bbox_transform(P3(const gs_rect *, const gs_matrix *, gs_rect *)), + gs_bbox_transform_inverse(P3(const gs_rect *, const gs_matrix *, gs_rect *)); + +#endif /* gsmatrix_INCLUDED */ |