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Fixed rotation formula

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git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@1679 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4
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RKrom 2012-03-05 07:20:02 +00:00
commit 25f8d81d5a
1 changed files with 30 additions and 20 deletions
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50
Greenshot/Drawing/Surface.cs
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@ -571,35 +571,45 @@ namespace Greenshot.Drawing {
case Effects.Grayscale:
newImage = ImageHelper.CreateGrayscale((Bitmap)Image);
break;
case Effects.Rotate270:
case Effects.Rotate90:
MakeUndoable(new DrawableContainerBoundsChangeMemento(elements.AsIDrawableContainerList()), false);
foreach(DrawableContainer drawableContainer in elements) {
int x1 = drawableContainer.Bounds.X - (Width >> 1);
int y1 = (-drawableContainer.Bounds.Y) + (Height >> 1);
int rotatedX1 = y1;
int rotatedY1 = -x1;
int newX1 = y1 + (Height >> 1);
int newY1 = -x1 - (Width >> 1);
int angle = 270;
int ox = 0;
int oy = 0;
int centerX = Width>>1;
int centerY = Height>>1;
int px = drawableContainer.Bounds.X - centerX;
int py = centerY - drawableContainer.Bounds.Y;
double theta = Math.PI * angle / 180.0;
double x1 = Math.Cos(theta) * (px-ox) - Math.Sin(theta) * (py-oy) + ox;
double y1 = Math.Sin(theta) * (px-ox) + Math.Cos(theta) * (py-oy) + oy;
int x2 = (drawableContainer.Bounds.X+drawableContainer.Bounds.Width) - (Width >> 1);
int y2 = (-(drawableContainer.Bounds.Y+drawableContainer.Bounds.Height)) + (Height >> 1);
int rotatedX2 = y2;
int rotatedY2 = -x2;
int newX2 = y2 + (Height >> 1);
int newY2 = -x2 - (Width >> 1);
int newWidth = newX2 - newX1;
int newHeight = newY2 - newY1;
// Transform to Cartesian coordinates
px = (drawableContainer.Bounds.X+drawableContainer.Bounds.Width) - centerX;
py = centerY - (drawableContainer.Bounds.Y+drawableContainer.Bounds.Height);
double x2 = Math.Cos(theta) * (px-ox) - Math.Sin(theta) * (py-oy) + ox;
double y2 = Math.Sin(theta) * (px-ox) + Math.Cos(theta) * (py-oy) + oy;
x1 += centerY;
x2 += centerY;
y1 = centerX - y1;
y2 = centerX - y2;
// Calculate to rectangle
double newWidth = x2 - x1;
double newHeight = y2 - y1;
RectangleF newRectangle = new RectangleF(
newX1,
newY1,
newWidth,
newHeight
(float)x1,
(float)y1,
(float)newWidth,
(float)newHeight
);
LOG.DebugFormat("Bounds before {0}, bounds after {1}", drawableContainer.Bounds, newRectangle);
drawableContainer.ApplyBounds(newRectangle);
}
newImage = ImageHelper.RotateFlip((Bitmap)Image, RotateFlipType.Rotate270FlipNone);
newImage = ImageHelper.RotateFlip((Bitmap)Image, RotateFlipType.Rotate90FlipNone);
break;
}