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gdiplus: Use linear gradient brush angles.
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1 changed files with 60 additions and 6 deletions
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@ -468,20 +468,74 @@ GpStatus WINGDIPAPI GdipCreateLineBrushFromRectI(GDIPCONST GpRect* rect,
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/******************************************************************************
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* GdipCreateLineBrushFromRectWithAngle [GDIPLUS.@]
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*
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* FIXME: angle value completely ignored. Don't know how to use it since native
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* always set Brush rectangle to rect (independetly of this angle).
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* Maybe it's used only on drawing.
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*/
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GpStatus WINGDIPAPI GdipCreateLineBrushFromRectWithAngle(GDIPCONST GpRectF* rect,
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ARGB startcolor, ARGB endcolor, REAL angle, BOOL isAngleScalable, GpWrapMode wrap,
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GpLineGradient **line)
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{
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GpStatus stat;
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LinearGradientMode mode;
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REAL width, height, exofs, eyofs;
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REAL sin_angle, cos_angle, sin_cos_angle;
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TRACE("(%p, %x, %x, %.2f, %d, %d, %p)\n", rect, startcolor, endcolor, angle, isAngleScalable,
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wrap, line);
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return GdipCreateLineBrushFromRect(rect, startcolor, endcolor, LinearGradientModeForwardDiagonal,
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wrap, line);
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sin_angle = sinf(deg2rad(angle));
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cos_angle = cosf(deg2rad(angle));
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sin_cos_angle = sin_angle * cos_angle;
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if (isAngleScalable)
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{
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width = height = 1.0;
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}
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else
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{
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width = rect->Width;
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height = rect->Height;
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}
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if (sin_cos_angle >= 0)
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mode = LinearGradientModeForwardDiagonal;
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else
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mode = LinearGradientModeBackwardDiagonal;
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stat = GdipCreateLineBrushFromRect(rect, startcolor, endcolor, mode, wrap, line);
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if (stat == Ok)
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{
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if (sin_cos_angle >= 0)
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{
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exofs = width * sin_cos_angle + height * cos_angle * cos_angle;
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eyofs = width * sin_angle * sin_angle + height * sin_cos_angle;
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}
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else
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{
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exofs = width * sin_angle * sin_angle + height * sin_cos_angle;
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eyofs = -width * sin_cos_angle + height * sin_angle * sin_angle;
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}
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if (isAngleScalable)
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{
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exofs = exofs * rect->Width;
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eyofs = eyofs * rect->Height;
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}
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if (sin_angle >= 0)
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{
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(*line)->endpoint.X = rect->X + exofs;
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(*line)->endpoint.Y = rect->Y + eyofs;
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}
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else
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{
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(*line)->endpoint.X = (*line)->startpoint.X;
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(*line)->endpoint.Y = (*line)->startpoint.Y;
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(*line)->startpoint.X = rect->X + exofs;
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(*line)->startpoint.Y = rect->Y + eyofs;
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}
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}
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return stat;
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}
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GpStatus WINGDIPAPI GdipCreateLineBrushFromRectWithAngleI(GDIPCONST GpRect* rect,
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