Sweden-Number/dlls/gdiplus/matrix.c

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/*
* Copyright (C) 2007 Google (Evan Stade)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
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#include <math.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "objbase.h"
#include "gdiplus.h"
#include "gdiplus_private.h"
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/* Multiplies two matrices of the form
*
* idx:0 idx:1 0
* idx:2 idx:3 0
* idx:4 idx:5 1
*
* and puts the output in out.
* */
static void matrix_multiply(GDIPCONST REAL * left, GDIPCONST REAL * right, REAL * out)
{
REAL temp[6];
int i, odd;
for(i = 0; i < 6; i++){
odd = i % 2;
temp[i] = left[i - odd] * right[odd] + left[i - odd + 1] * right[odd + 2] +
(i >= 4 ? right[odd + 4] : 0.0);
}
memcpy(out, temp, 6 * sizeof(REAL));
}
GpStatus WINGDIPAPI GdipCreateMatrix2(REAL m11, REAL m12, REAL m21, REAL m22,
REAL dx, REAL dy, GpMatrix **matrix)
{
if(!matrix)
return InvalidParameter;
*matrix = GdipAlloc(sizeof(GpMatrix));
if(!*matrix) return OutOfMemory;
/* first row */
(*matrix)->matrix[0] = m11;
(*matrix)->matrix[1] = m12;
/* second row */
(*matrix)->matrix[2] = m21;
(*matrix)->matrix[3] = m22;
/* third row */
(*matrix)->matrix[4] = dx;
(*matrix)->matrix[5] = dy;
return Ok;
}
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GpStatus WINGDIPAPI GdipCreateMatrix3(GDIPCONST GpRectF *rect,
GDIPCONST GpPointF *pt, GpMatrix **matrix)
{
if(!matrix)
return InvalidParameter;
*matrix = GdipAlloc(sizeof(GpMatrix));
if(!*matrix) return OutOfMemory;
memcpy((*matrix)->matrix, rect, 4 * sizeof(REAL));
(*matrix)->matrix[4] = pt->X;
(*matrix)->matrix[5] = pt->Y;
return Ok;
}
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GpStatus WINGDIPAPI GdipCloneMatrix(GpMatrix *matrix, GpMatrix **clone)
{
if(!matrix || !clone)
return InvalidParameter;
*clone = GdipAlloc(sizeof(GpMatrix));
if(!*clone) return OutOfMemory;
**clone = *matrix;
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return Ok;
}
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GpStatus WINGDIPAPI GdipCreateMatrix(GpMatrix **matrix)
{
if(!matrix)
return InvalidParameter;
*matrix = GdipAlloc(sizeof(GpMatrix));
if(!*matrix) return OutOfMemory;
(*matrix)->matrix[0] = 1.0;
(*matrix)->matrix[1] = 0.0;
(*matrix)->matrix[2] = 0.0;
(*matrix)->matrix[3] = 1.0;
(*matrix)->matrix[4] = 0.0;
(*matrix)->matrix[5] = 0.0;
return Ok;
}
GpStatus WINGDIPAPI GdipDeleteMatrix(GpMatrix *matrix)
{
if(!matrix)
return InvalidParameter;
GdipFree(matrix);
return Ok;
}
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GpStatus WINGDIPAPI GdipGetMatrixElements(GDIPCONST GpMatrix *matrix,
REAL *out)
{
if(!matrix || !out)
return InvalidParameter;
memcpy(out, matrix->matrix, sizeof(matrix->matrix));
return Ok;
}
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GpStatus WINGDIPAPI GdipMultiplyMatrix(GpMatrix *matrix, GpMatrix* matrix2,
GpMatrixOrder order)
{
if(!matrix || !matrix2)
return InvalidParameter;
if(order == MatrixOrderAppend)
matrix_multiply(matrix->matrix, matrix2->matrix, matrix->matrix);
else
matrix_multiply(matrix2->matrix, matrix->matrix, matrix->matrix);
return Ok;
}
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GpStatus WINGDIPAPI GdipRotateMatrix(GpMatrix *matrix, REAL angle,
GpMatrixOrder order)
{
REAL cos_theta, sin_theta, rotate[6];
if(!matrix)
return InvalidParameter;
angle = deg2rad(angle);
cos_theta = cos(angle);
sin_theta = sin(angle);
rotate[0] = cos_theta;
rotate[1] = sin_theta;
rotate[2] = -sin_theta;
rotate[3] = cos_theta;
rotate[4] = 0.0;
rotate[5] = 0.0;
if(order == MatrixOrderAppend)
matrix_multiply(matrix->matrix, rotate, matrix->matrix);
else
matrix_multiply(rotate, matrix->matrix, matrix->matrix);
return Ok;
}
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GpStatus WINGDIPAPI GdipScaleMatrix(GpMatrix *matrix, REAL scaleX, REAL scaleY,
GpMatrixOrder order)
{
REAL scale[6];
if(!matrix)
return InvalidParameter;
scale[0] = scaleX;
scale[1] = 0.0;
scale[2] = 0.0;
scale[3] = scaleY;
scale[4] = 0.0;
scale[5] = 0.0;
if(order == MatrixOrderAppend)
matrix_multiply(matrix->matrix, scale, matrix->matrix);
else
matrix_multiply(scale, matrix->matrix, matrix->matrix);
return Ok;
}
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GpStatus WINGDIPAPI GdipSetMatrixElements(GpMatrix *matrix, REAL m11, REAL m12,
REAL m21, REAL m22, REAL dx, REAL dy)
{
if(!matrix)
return InvalidParameter;
matrix->matrix[0] = m11;
matrix->matrix[1] = m12;
matrix->matrix[2] = m21;
matrix->matrix[3] = m22;
matrix->matrix[4] = dx;
matrix->matrix[5] = dy;
return Ok;
}
GpStatus WINGDIPAPI GdipTransformMatrixPoints(GpMatrix *matrix, GpPointF *pts,
INT count)
{
REAL x, y;
INT i;
if(!matrix || !pts)
return InvalidParameter;
for(i = 0; i < count; i++)
{
x = pts[i].X;
y = pts[i].Y;
pts[i].X = x * matrix->matrix[0] + y * matrix->matrix[2] + matrix->matrix[4];
pts[i].Y = x * matrix->matrix[1] + y * matrix->matrix[3] + matrix->matrix[5];
}
return Ok;
}
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GpStatus WINGDIPAPI GdipTranslateMatrix(GpMatrix *matrix, REAL offsetX,
REAL offsetY, GpMatrixOrder order)
{
REAL translate[6];
if(!matrix)
return InvalidParameter;
translate[0] = 1.0;
translate[1] = 0.0;
translate[2] = 0.0;
translate[3] = 1.0;
translate[4] = offsetX;
translate[5] = offsetY;
if(order == MatrixOrderAppend)
matrix_multiply(matrix->matrix, translate, matrix->matrix);
else
matrix_multiply(translate, matrix->matrix, matrix->matrix);
return Ok;
}