/usr/include/tesseract/xform2d.h is in libtesseract-dev 3.02.01-2.
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** Filename: xform2d.h
** Purpose: Definitions for using 2D point transformation library
** Author: Dan Johnson
** History: Fri Sep 22 09:57:08 1989, DSJ, Created.
**
** (c) Copyright Hewlett-Packard Company, 1988.
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
** http://www.apache.org/licenses/LICENSE-2.0
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
******************************************************************************/
#ifndef XFORM2D_H
#define XFORM2D_H
/**----------------------------------------------------------------------------
Include Files and Type Defines
----------------------------------------------------------------------------**/
#include "fpoint.h"
typedef struct
{
FLOAT32 a, b, c, d, tx, ty;
}
MATRIX_2D, *MATRIX_2D_PTR;
/**----------------------------------------------------------------------------
Public Function Prototypes
----------------------------------------------------------------------------**/
void InitMatrix(MATRIX_2D *M);
void CopyMatrix(MATRIX_2D *A, MATRIX_2D *B);
/* matrix scaling, translation, rotation, mirroring, etc.*/
void TranslateMatrix(MATRIX_2D *M, FLOAT32 X, FLOAT32 Y);
void ScaleMatrix(MATRIX_2D *M, FLOAT32 X, FLOAT32 Y);
void MirrorMatrixInX(MATRIX_2D *M);
void MirrorMatrixInY(MATRIX_2D *M);
void MirrorMatrixInXY(MATRIX_2D *M);
/* using a matrix to map points*/
FLOAT32 MapX(MATRIX_2D *M, FLOAT32 X, FLOAT32 Y);
FLOAT32 MapY(MATRIX_2D *M, FLOAT32 X, FLOAT32 Y);
void MapPoint(MATRIX_2D *M, const FPOINT &A, FPOINT* B);
FLOAT32 MapDx(MATRIX_2D *M, FLOAT32 DX, FLOAT32 DY);
FLOAT32 MapDy(MATRIX_2D M, FLOAT32 DX, FLOAT32 DY);
void RotateMatrix(MATRIX_2D_PTR Matrix, FLOAT32 Angle);
#endif
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