Smooth Objects

Smooths the edges of black objects within a 1-bit image, improving the image's appearance and reducing the size of the image when compressed. It fills small pits in the edges of characters and removes small bumps.

SmoothingBefore → Description: Description: Description: SmoothingAfter

The uncompressed image to be processed must reside in the Get Queue prior to REQ_EXEC. Typically, the image will be fully contained in the Get Queue, but that is not a requirement. The output image will be placed into the Put Queue during REQ_EXEC.

Padding pixels present at the end of each line may be modified by this operation.

Subcode is set to SF_SUBCODE_SMOOTH_OBJECTS (19).
u.SC19.Amount is set to a value that controls the amount of smoothing. Valid values are 1 to 1000, with 3 being a good default.
Stride is set to the image line width in bytes including padding at the end of the line width or to 0. If Stride is 0 and PF_NoDibPad is set in PicFlags, the operation will compute the stride using: [ (PixelWidth*BitCount)/8 ]. If Stride is 0 and PF_NoDibPad is not set in PicFlags, the operation will compute the stride using: [ (((PixelWidth*BitCount)+31)&(~31))/8 ].

In addition to placing an output image into the Put Queue, this operation stores some output information into the PIC_PARM structure in the following locations.

OutputStride is set, during REQ_INIT and REQ_EXEC, to the image line width in bytes including padding at the end of the line.
BiOut is set, during REQ_INIT and REQ_EXEC, to the attributes of the output image. Since this operation does not adjust the size of the image, BiOut will be set to a copy of the Head structure within PIC_PARM.