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gdiplus: Use linear gradient brush angles.

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This commit is contained in:
Vincent Povirk 2010-02-06 15:43:16 -06:00 committed by Alexandre Julliard
parent 318ba28630
commit 71e4af507f
1 changed files with 60 additions and 6 deletions
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66
dlls/gdiplus/brush.c
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@ -468,20 +468,74 @@ GpStatus WINGDIPAPI GdipCreateLineBrushFromRectI(GDIPCONST GpRect* rect,
/******************************************************************************
* GdipCreateLineBrushFromRectWithAngle [GDIPLUS.@]
*
* FIXME: angle value completely ignored. Don't know how to use it since native
* always set Brush rectangle to rect (independetly of this angle).
* Maybe it's used only on drawing.
*/
GpStatus WINGDIPAPI GdipCreateLineBrushFromRectWithAngle(GDIPCONST GpRectF* rect,
ARGB startcolor, ARGB endcolor, REAL angle, BOOL isAngleScalable, GpWrapMode wrap,
GpLineGradient **line)
{
GpStatus stat;
LinearGradientMode mode;
REAL width, height, exofs, eyofs;
REAL sin_angle, cos_angle, sin_cos_angle;
TRACE("(%p, %x, %x, %.2f, %d, %d, %p)\n", rect, startcolor, endcolor, angle, isAngleScalable,
wrap, line);
return GdipCreateLineBrushFromRect(rect, startcolor, endcolor, LinearGradientModeForwardDiagonal,
wrap, line);
sin_angle = sinf(deg2rad(angle));
cos_angle = cosf(deg2rad(angle));
sin_cos_angle = sin_angle * cos_angle;
if (isAngleScalable)
{
width = height = 1.0;
}
else
{
width = rect->Width;
height = rect->Height;
}
if (sin_cos_angle >= 0)
mode = LinearGradientModeForwardDiagonal;
else
mode = LinearGradientModeBackwardDiagonal;
stat = GdipCreateLineBrushFromRect(rect, startcolor, endcolor, mode, wrap, line);
if (stat == Ok)
{
if (sin_cos_angle >= 0)
{
exofs = width * sin_cos_angle + height * cos_angle * cos_angle;
eyofs = width * sin_angle * sin_angle + height * sin_cos_angle;
}
else
{
exofs = width * sin_angle * sin_angle + height * sin_cos_angle;
eyofs = -width * sin_cos_angle + height * sin_angle * sin_angle;
}
if (isAngleScalable)
{
exofs = exofs * rect->Width;
eyofs = eyofs * rect->Height;
}
if (sin_angle >= 0)
{
(*line)->endpoint.X = rect->X + exofs;
(*line)->endpoint.Y = rect->Y + eyofs;
}
else
{
(*line)->endpoint.X = (*line)->startpoint.X;
(*line)->endpoint.Y = (*line)->startpoint.Y;
(*line)->startpoint.X = rect->X + exofs;
(*line)->startpoint.Y = rect->Y + eyofs;
}
}
return stat;
}
GpStatus WINGDIPAPI GdipCreateLineBrushFromRectWithAngleI(GDIPCONST GpRect* rect,