matrix.c File Reference

#include <stdarg.h>
#include <math.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "objbase.h"
#include "gdiplus.h"
#include "gdiplus_private.h"
#include "wine/debug.h"

Include dependency graph for matrix.c:

Go to the source code of this file.

Functions
	WINE_DEFAULT_DEBUG_CHANNEL (gdiplus)
static void	matrix_multiply (GDIPCONST REAL *left, GDIPCONST REAL *right, REAL *out)
static REAL	matrix_det (GDIPCONST GpMatrix *matrix)
GpStatus WINGDIPAPI	GdipCreateMatrix2 (REAL m11, REAL m12, REAL m21, REAL m22, REAL dx, REAL dy, GpMatrix **matrix)
GpStatus WINGDIPAPI	GdipCreateMatrix3 (GDIPCONST GpRectF *rect, GDIPCONST GpPointF *pt, GpMatrix **matrix)
GpStatus WINGDIPAPI	GdipCreateMatrix3I (GDIPCONST GpRect *rect, GDIPCONST GpPoint *pt, GpMatrix **matrix)
GpStatus WINGDIPAPI	GdipCloneMatrix (GpMatrix *matrix, GpMatrix **clone)
GpStatus WINGDIPAPI	GdipCreateMatrix (GpMatrix **matrix)
GpStatus WINGDIPAPI	GdipDeleteMatrix (GpMatrix *matrix)
GpStatus WINGDIPAPI	GdipGetMatrixElements (GDIPCONST GpMatrix *matrix, REAL *out)
GpStatus WINGDIPAPI	GdipInvertMatrix (GpMatrix *matrix)
GpStatus WINGDIPAPI	GdipIsMatrixInvertible (GDIPCONST GpMatrix *matrix, BOOL *result)
GpStatus WINGDIPAPI	GdipMultiplyMatrix (GpMatrix *matrix, GDIPCONST GpMatrix *matrix2, GpMatrixOrder order)
GpStatus WINGDIPAPI	GdipRotateMatrix (GpMatrix *matrix, REAL angle, GpMatrixOrder order)
GpStatus WINGDIPAPI	GdipScaleMatrix (GpMatrix *matrix, REAL scaleX, REAL scaleY, GpMatrixOrder order)
GpStatus WINGDIPAPI	GdipSetMatrixElements (GpMatrix *matrix, REAL m11, REAL m12, REAL m21, REAL m22, REAL dx, REAL dy)
GpStatus WINGDIPAPI	GdipShearMatrix (GpMatrix *matrix, REAL shearX, REAL shearY, GpMatrixOrder order)
GpStatus WINGDIPAPI	GdipTransformMatrixPoints (GpMatrix *matrix, GpPointF *pts, INT count)
GpStatus WINGDIPAPI	GdipTransformMatrixPointsI (GpMatrix *matrix, GpPoint *pts, INT count)
GpStatus WINGDIPAPI	GdipTranslateMatrix (GpMatrix *matrix, REAL offsetX, REAL offsetY, GpMatrixOrder order)
GpStatus WINGDIPAPI	GdipVectorTransformMatrixPoints (GpMatrix *matrix, GpPointF *pts, INT count)
GpStatus WINGDIPAPI	GdipVectorTransformMatrixPointsI (GpMatrix *matrix, GpPoint *pts, INT count)
GpStatus WINGDIPAPI	GdipIsMatrixEqual (GDIPCONST GpMatrix *matrix, GDIPCONST GpMatrix *matrix2, BOOL *result)
GpStatus WINGDIPAPI	GdipIsMatrixIdentity (GDIPCONST GpMatrix *matrix, BOOL *result)

Function Documentation

GdipCloneMatrix()

GpStatus WINGDIPAPI GdipCloneMatrix	(	GpMatrix *	matrix,
		GpMatrix **	clone
	)

Definition at line 125 of file matrix.c.

{
    TRACE("(%p, %p)\n", matrix, clone);
 
    if(!matrix || !clone)
        return InvalidParameter;
 
    *clone = heap_alloc_zero(sizeof(GpMatrix));
    if(!*clone)    return OutOfMemory;
 
    **clone = *matrix;
 
    return Ok;
}

GdipCreateMatrix()

GpStatus WINGDIPAPI GdipCreateMatrix

(

GpMatrix **

matrix

)

Definition at line 140 of file matrix.c.

{
    TRACE("(%p)\n", matrix);
 
    if(!matrix)
        return InvalidParameter;
 
    *matrix = heap_alloc_zero(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;
}

Referenced by GdipEnumerateMetafileSrcRectDestPoints(), GdipIsOutlineVisiblePathPoint(), get_pen_transform(), SOFTWARE_GdipDrawPath(), SOFTWARE_GdipDrawThinPath(), test_BeginContainer2(), test_clipping(), test_clipping_2(), test_excludeinfinite(), test_flatten(), test_font_transform(), test_GdipDrawString(), test_Get_Release_DC(), test_getregiondata(), test_gradientgetrect(), test_scans(), test_string_functions(), test_transform(), test_widen(), and test_worldtransform().

GdipCreateMatrix2()

GpStatus WINGDIPAPI GdipCreateMatrix2	(	REAL	m11,
		REAL	m12,
		REAL	m21,
		REAL	m22,
		REAL	dx,
		REAL	dy,
		GpMatrix **	matrix
	)

Definition at line 61 of file matrix.c.

{
    TRACE("(%.2f, %.2f, %.2f, %.2f, %.2f, %.2f, %p)\n", m11, m12, m21, m22, dx, dy, matrix);
 
    if(!matrix)
        return InvalidParameter;
 
    *matrix = heap_alloc_zero(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;
}

Referenced by GdipCreateMatrix3(), test_BeginContainer2(), test_constructor_destructor(), test_DrawImage_scale(), test_invert(), test_isidentity(), test_isinfinite(), test_isinvertible(), test_shear(), test_transform(), and test_worldbounds().

GdipCreateMatrix3()

GpStatus WINGDIPAPI GdipCreateMatrix3	(	GDIPCONST GpRectF *	rect,
		GDIPCONST GpPointF *	pt,
		GpMatrix **	matrix
	)

Definition at line 85 of file matrix.c.

{
    REAL m11, m12, m21, m22, dx, dy;
    TRACE("(%p, %p, %p)\n", rect, pt, matrix);
 
    if(!matrix || !pt)
        return InvalidParameter;
 
    m11 = (pt[1].X - pt[0].X) / rect->Width;
    m21 = (pt[2].X - pt[0].X) / rect->Height;
    dx = pt[0].X - m11 * rect->X - m21 * rect->Y;
    m12 = (pt[1].Y - pt[0].Y) / rect->Width;
    m22 = (pt[2].Y - pt[0].Y) / rect->Height;
    dy = pt[0].Y - m12 * rect->X - m22 * rect->Y;
 
    return GdipCreateMatrix2(m11, m12, m21, m22, dx, dy, matrix);
}

Referenced by GdipCreateMatrix3I(), METAFILE_PlaybackUpdateWorldTransform(), and test_constructor3().

GdipCreateMatrix3I()

GpStatus WINGDIPAPI GdipCreateMatrix3I	(	GDIPCONST GpRect *	rect,
		GDIPCONST GpPoint *	pt,
		GpMatrix **	matrix
	)

Definition at line 104 of file matrix.c.

{
    GpRectF rectF;
    GpPointF ptF[3];
    int i;
 
    TRACE("(%p, %p, %p)\n", rect, pt, matrix);
 
    rectF.X = (REAL)rect->X;
    rectF.Y = (REAL)rect->Y;
    rectF.Width = (REAL)rect->Width;
    rectF.Height = (REAL)rect->Height;
 
    for (i = 0; i < 3; i++) {
        ptF[i].X = (REAL)pt[i].X;
        ptF[i].Y = (REAL)pt[i].Y;
    }
    return GdipCreateMatrix3(&rectF, ptF, matrix);
}

GdipDeleteMatrix()

GpStatus WINGDIPAPI GdipDeleteMatrix

(

GpMatrix *

matrix

)

Definition at line 160 of file matrix.c.

{
    TRACE("(%p)\n", matrix);
 
    if(!matrix)
        return InvalidParameter;
 
    heap_free(matrix);
 
    return Ok;
}

Referenced by GdipEnumerateMetafileSrcRectDestPoints(), GdipIsOutlineVisiblePathPoint(), get_pen_transform(), METAFILE_PlaybackUpdateWorldTransform(), SOFTWARE_GdipDrawPath(), SOFTWARE_GdipDrawThinPath(), test_BeginContainer2(), test_clipping(), test_clipping_2(), test_constructor3(), test_constructor_destructor(), test_DrawImage_scale(), test_excludeinfinite(), test_flatten(), test_font_transform(), test_GdipDrawString(), test_Get_Release_DC(), test_getregiondata(), test_gradientgetrect(), test_invert(), test_isidentity(), test_isinfinite(), test_isinvertible(), test_scans(), test_shear(), test_string_functions(), test_transform(), test_widen(), test_worldbounds(), and test_worldtransform().

GdipGetMatrixElements()

GpStatus WINGDIPAPI GdipGetMatrixElements	(	GDIPCONST GpMatrix *	matrix,
		REAL *	out
	)

Definition at line 172 of file matrix.c.

{
    TRACE("(%p, %p)\n", matrix, out);
 
    if(!matrix || !out)
        return InvalidParameter;
 
    memcpy(out, matrix->matrix, sizeof(matrix->matrix));
 
    return Ok;
}

Referenced by get_pen_transform(), test_BeginContainer2(), test_constructor3(), test_gradientgetrect(), test_invert(), test_transform(), and test_worldtransform().

GdipInvertMatrix()

GpStatus WINGDIPAPI GdipInvertMatrix

(

GpMatrix *

matrix

)

Definition at line 185 of file matrix.c.

{
    GpMatrix copy;
    REAL det;
    BOOL invertible;
 
    TRACE("(%p)\n", matrix);
 
    if(!matrix)
        return InvalidParameter;
 
    GdipIsMatrixInvertible(matrix, &invertible);
    if(!invertible)
        return InvalidParameter;
 
    /* optimize inverting simple scaling and translation matrices */
    if(matrix->matrix[1] == 0 && matrix->matrix[2] == 0)
    {
        matrix->matrix[4] = -matrix->matrix[4] / matrix->matrix[0];
        matrix->matrix[5] = -matrix->matrix[5] / matrix->matrix[3];
        matrix->matrix[0] = 1 / matrix->matrix[0];
        matrix->matrix[3] = 1 / matrix->matrix[3];
 
        return Ok;
    }
 
    det = matrix_det(matrix);
 
    copy = *matrix;
    /* store result */
    matrix->matrix[0] =   copy.matrix[3] / det;
    matrix->matrix[1] =  -copy.matrix[1] / det;
    matrix->matrix[2] =  -copy.matrix[2] / det;
    matrix->matrix[3] =   copy.matrix[0] / det;
    matrix->matrix[4] =  (copy.matrix[2]*copy.matrix[5]-copy.matrix[3]*copy.matrix[4]) / det;
    matrix->matrix[5] = -(copy.matrix[0]*copy.matrix[5]-copy.matrix[1]*copy.matrix[4]) / det;
 
    return Ok;
}

Referenced by brush_fill_pixels(), GdipDrawImagePointsRect(), GdipIsOutlineVisiblePathPoint(), get_graphics_transform(), SOFTWARE_GdipDrawPath(), and test_invert().

GdipIsMatrixEqual()

GpStatus WINGDIPAPI GdipIsMatrixEqual	(	GDIPCONST GpMatrix *	matrix,
		GDIPCONST GpMatrix *	matrix2,
		BOOL *	result
	)

Definition at line 499 of file matrix.c.

{
    TRACE("(%p, %p, %p)\n", matrix, matrix2, result);
 
    if(!matrix || !matrix2 || !result)
        return InvalidParameter;
    /* based on single array member of GpMatrix */
    *result = (memcmp(matrix->matrix, matrix2->matrix, sizeof(GpMatrix)) == 0);
 
    return Ok;
}

Referenced by GdipIsMatrixIdentity(), test_invert(), test_shear(), and test_transform().

GdipIsMatrixIdentity()

GpStatus WINGDIPAPI GdipIsMatrixIdentity	(	GDIPCONST GpMatrix *	matrix,
		BOOL *	result
	)

Definition at line 512 of file matrix.c.

{
    static const GpMatrix identity =
    {
      { 1.0, 0.0,
        0.0, 1.0,
        0.0, 0.0 }
    };
 
    TRACE("(%p, %p)\n", matrix, result);
 
    if(!matrix || !result)
        return InvalidParameter;
 
    return GdipIsMatrixEqual(matrix, &identity, result);
}

Referenced by brush_fill_pixels(), GdipSetClipRect(), GdipSetClipRegion(), get_clip_hrgn(), METAFILE_AddPenObject(), test_gradientgetrect(), test_isidentity(), test_transform(), and test_worldtransform().

GdipIsMatrixInvertible()

GpStatus WINGDIPAPI GdipIsMatrixInvertible	(	GDIPCONST GpMatrix *	matrix,
		BOOL *	result
	)

Definition at line 225 of file matrix.c.

{
    TRACE("(%p, %p)\n", matrix, result);
 
    if(!matrix || !result)
        return InvalidParameter;
 
    if(matrix->matrix[1] == 0 && matrix->matrix[2] == 0)
        *result = matrix->matrix[0] != 0 && matrix->matrix[3] != 0;
    else
        *result = (fabs(matrix_det(matrix)) >= 1e-5);
 
    return Ok;
}

Referenced by GdipInvertMatrix(), and test_isinvertible().

GdipMultiplyMatrix()

GpStatus WINGDIPAPI GdipMultiplyMatrix	(	GpMatrix *	matrix,
		GDIPCONST GpMatrix *	matrix2,
		GpMatrixOrder	order
	)

Definition at line 240 of file matrix.c.

{
    TRACE("(%p, %p, %d)\n", matrix, matrix2, order);
 
    if(!matrix || !matrix2)
        return InvalidParameter;
 
    if(order == MatrixOrderAppend)
        matrix_multiply(matrix->matrix, matrix2->matrix, matrix->matrix);
    else if (order == MatrixOrderPrepend)
        matrix_multiply(matrix2->matrix, matrix->matrix, matrix->matrix);
    else
        return InvalidParameter;
 
    return Ok;
}

Referenced by GdipBeginContainer(), GdipMultiplyLineTransform(), GdipMultiplyPathGradientTransform(), GdipMultiplyPenTransform(), GdipMultiplyTextureTransform(), GdipMultiplyWorldTransform(), GdipPlayMetafileRecord(), get_graphics_transform(), linegradient_init_transform(), and METAFILE_PlaybackUpdateWorldTransform().

GdipRotateMatrix()

GpStatus WINGDIPAPI GdipRotateMatrix	(	GpMatrix *	matrix,
		REAL	angle,
		GpMatrixOrder	order
	)

Definition at line 258 of file matrix.c.

{
    REAL cos_theta, sin_theta, rotate[6];
 
    TRACE("(%p, %.2f, %d)\n", matrix, angle, order);
 
    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 if (order == MatrixOrderPrepend)
        matrix_multiply(rotate, matrix->matrix, matrix->matrix);
    else
        return InvalidParameter;
 
    return Ok;
}

Referenced by draw_cap(), GdipPlayMetafileRecord(), GdipRotatePathGradientTransform(), GdipRotatePenTransform(), GdipRotateTextureTransform(), GdipRotateWorldTransform(), test_clipping(), test_clipping_2(), test_font_transform(), and test_transform().

GdipScaleMatrix()

GpStatus WINGDIPAPI GdipScaleMatrix	(	GpMatrix *	matrix,
		REAL	scaleX,
		REAL	scaleY,
		GpMatrixOrder	order
	)

Definition at line 289 of file matrix.c.

{
    REAL scale[6];
 
    TRACE("(%p, %.2f, %.2f, %d)\n", matrix, scaleX, scaleY, order);
 
    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 if (order == MatrixOrderPrepend)
        matrix_multiply(scale, matrix->matrix, matrix->matrix);
    else
        return InvalidParameter;
 
    return Ok;
}

Referenced by draw_cap(), GdipGetLogFontW(), GdipPlayMetafileRecord(), GdipScaleLineTransform(), GdipScalePathGradientTransform(), GdipScalePenTransform(), GdipScaleTextureTransform(), GdipScaleWorldTransform(), get_graphics_transform(), linegradient_init_transform(), METAFILE_PlaybackUpdateWorldTransform(), test_clipping(), test_clipping_2(), test_font_transform(), test_transform(), and test_widen().

GdipSetMatrixElements()

GpStatus WINGDIPAPI GdipSetMatrixElements	(	GpMatrix *	matrix,
		REAL	m11,
		REAL	m12,
		REAL	m21,
		REAL	m22,
		REAL	dx,
		REAL	dy
	)

Definition at line 316 of file matrix.c.

{
    TRACE("(%p, %.2f, %.2f, %.2f, %.2f, %.2f, %.2f)\n", matrix, m11, m12,
            m21, m22, dx, 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;
}

Referenced by create_line_brush(), create_path_gradient(), draw_cap(), GdipCreateFromHDC2(), GdipCreatePen2(), GdipCreateTextureIA(), GdipDrawImagePointsRect(), GdipPlayMetafileRecord(), GdipResetLineTransform(), GdipResetPathGradientTransform(), GdipResetPenTransform(), GdipResetTextureTransform(), GdipResetWorldTransform(), get_gdi_transform(), get_graphics_transform(), graphics_from_image(), linegradient_init_transform(), test_isidentity(), test_transform(), and test_worldtransform().

GdipShearMatrix()

GpStatus WINGDIPAPI GdipShearMatrix	(	GpMatrix *	matrix,
		REAL	shearX,
		REAL	shearY,
		GpMatrixOrder	order
	)

Definition at line 335 of file matrix.c.

{
    REAL shear[6];
 
    TRACE("(%p, %.2f, %.2f, %d)\n", matrix, shearX, shearY, order);
 
    if(!matrix)
        return InvalidParameter;
 
    /* prepare transformation matrix */
    shear[0] = 1.0;
    shear[1] = shearY;
    shear[2] = shearX;
    shear[3] = 1.0;
    shear[4] = 0.0;
    shear[5] = 0.0;
 
    if(order == MatrixOrderAppend)
        matrix_multiply(matrix->matrix, shear, matrix->matrix);
    else if (order == MatrixOrderPrepend)
        matrix_multiply(shear, matrix->matrix, matrix->matrix);
    else
        return InvalidParameter;
 
    return Ok;
}

Referenced by test_font_transform(), and test_shear().

GdipTransformMatrixPoints()

GpStatus WINGDIPAPI GdipTransformMatrixPoints	(	GpMatrix *	matrix,
		GpPointF *	pts,
		INT	count
	)

Definition at line 363 of file matrix.c.

{
    REAL x, y;
    INT i;
 
    TRACE("(%p, %p, %d)\n", matrix, pts, count);
 
    if(!matrix || !pts || count <= 0)
        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;
}

Referenced by brush_fill_pixels(), draw_cap(), gdip_transform_points(), GdipDrawImagePointsRect(), GdipGetLogFontW(), GdipGetPathWorldBounds(), GdipMeasureDriverString(), GdipTransformMatrixPointsI(), GdipTransformPath(), get_font_hfont(), prepare_dc(), test_transform(), and transform_region_element().

GdipTransformMatrixPointsI()

GpStatus WINGDIPAPI GdipTransformMatrixPointsI	(	GpMatrix *	matrix,
		GpPoint *	pts,
		INT	count
	)

Definition at line 386 of file matrix.c.

{
    GpPointF *ptsF;
    GpStatus ret;
    INT i;
 
    TRACE("(%p, %p, %d)\n", matrix, pts, count);
 
    if(count <= 0)
        return InvalidParameter;
 
    ptsF = heap_alloc_zero(sizeof(GpPointF) * count);
    if(!ptsF)
        return OutOfMemory;
 
    for(i = 0; i < count; i++){
        ptsF[i].X = (REAL)pts[i].X;
        ptsF[i].Y = (REAL)pts[i].Y;
    }
 
    ret = GdipTransformMatrixPoints(matrix, ptsF, count);
 
    if(ret == Ok)
        for(i = 0; i < count; i++){
            pts[i].X = gdip_round(ptsF[i].X);
            pts[i].Y = gdip_round(ptsF[i].Y);
        }
    heap_free(ptsF);
 
    return ret;
}

GdipTranslateMatrix()

GpStatus WINGDIPAPI GdipTranslateMatrix	(	GpMatrix *	matrix,
		REAL	offsetX,
		REAL	offsetY,
		GpMatrixOrder	order
	)

Definition at line 418 of file matrix.c.

{
    REAL translate[6];
 
    TRACE("(%p, %.2f, %.2f, %d)\n", matrix, offsetX, offsetY, order);
 
    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 if (order == MatrixOrderPrepend)
        matrix_multiply(translate, matrix->matrix, matrix->matrix);
    else
        return InvalidParameter;
 
    return Ok;
}

Referenced by draw_cap(), GdipPlayMetafileRecord(), GdipTranslateLineTransform(), GdipTranslatePathGradientTransform(), GdipTranslatePenTransform(), GdipTranslateTextureTransform(), GdipTranslateWorldTransform(), linegradient_init_transform(), test_clipping(), test_clipping_2(), and test_font_transform().

GdipVectorTransformMatrixPoints()

GpStatus WINGDIPAPI GdipVectorTransformMatrixPoints	(	GpMatrix *	matrix,
		GpPointF *	pts,
		INT	count
	)

Definition at line 445 of file matrix.c.

{
    REAL x, y;
    INT i;
 
    TRACE("(%p, %p, %d)\n", matrix, pts, count);
 
    if(!matrix || !pts || count <= 0)
        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];
        pts[i].Y = x * matrix->matrix[1] + y * matrix->matrix[3];
    }
 
    return Ok;
}

Referenced by GdipVectorTransformMatrixPointsI().

GdipVectorTransformMatrixPointsI()

GpStatus WINGDIPAPI GdipVectorTransformMatrixPointsI	(	GpMatrix *	matrix,
		GpPoint *	pts,
		INT	count
	)

Definition at line 467 of file matrix.c.

{
    GpPointF *ptsF;
    GpStatus ret;
    INT i;
 
    TRACE("(%p, %p, %d)\n", matrix, pts, count);
 
    if(count <= 0)
        return InvalidParameter;
 
    ptsF = heap_alloc_zero(sizeof(GpPointF) * count);
    if(!ptsF)
        return OutOfMemory;
 
    for(i = 0; i < count; i++){
        ptsF[i].X = (REAL)pts[i].X;
        ptsF[i].Y = (REAL)pts[i].Y;
    }
 
    ret = GdipVectorTransformMatrixPoints(matrix, ptsF, count);
    /* store back */
    if(ret == Ok)
        for(i = 0; i < count; i++){
            pts[i].X = gdip_round(ptsF[i].X);
            pts[i].Y = gdip_round(ptsF[i].Y);
        }
    heap_free(ptsF);
 
    return ret;
}

matrix_det()

static REAL matrix_det ( GDIPCONST GpMatrix *  matrix )

static

Definition at line 56 of file matrix.c.

{
    return matrix->matrix[0]*matrix->matrix[3] - matrix->matrix[1]*matrix->matrix[2];
}

Referenced by GdipInvertMatrix(), and GdipIsMatrixInvertible().

matrix_multiply()

static void matrix_multiply ( GDIPCONST REAL *  left, GDIPCONST REAL *  right, REAL *  out  )

static

Definition at line 42 of file matrix.c.

{
    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));
}

Referenced by GdipMultiplyMatrix(), GdipRotateMatrix(), GdipScaleMatrix(), GdipShearMatrix(), and GdipTranslateMatrix().

WINE_DEFAULT_DEBUG_CHANNEL()

WINE_DEFAULT_DEBUG_CHANNEL

(

gdiplus

)