Method CalcParams

processing/prepare.go:269–281

CalcParams calculates context image parameters based on the current image size. Some steps (like trim) must call this function when finished.

()

// CalcParams calculates context image parameters based on the current image size.
// Some steps (like trim) must call this function when finished.
func (c *Context) CalcParams() {
	c.SrcWidth, c.SrcHeight, c.Angle, c.Flip = ExtractGeometry(c.Img, c.PO.Rotate(), c.PO.AutoRotate())

	c.CropWidth = CalcCropSize(c.SrcWidth, c.PO.CropWidth())
	c.CropHeight = CalcCropSize(c.SrcHeight, c.PO.CropHeight())

	widthToScale := imath.MinNonZero(c.CropWidth, c.SrcWidth)
	heightToScale := imath.MinNonZero(c.CropHeight, c.SrcHeight)

	c.calcScale(widthToScale, heightToScale, c.PO)
	c.calcSizes(widthToScale, heightToScale, c.PO)
	c.limitScale(widthToScale, heightToScale, c.PO)
}