Draws an arc.

The arc is considered a portion of an ellipse. The ellipse is defined by the TRect argument.

The pixels at both the start point and the end point are drawn.

The arc itself is the segment of the ellipse drawn in an anti-clockwise direction from the start point to the end point.

Notes:

A rectangle is used in the construction of the ellipse of which the arc is a segment. This rectangle is passed as an argument of type TRect.

A wide line arc is drawn with the pixels distributed either side of a true ellipse, in such a way that the outer edge of the line would touch the edge of the construction rectangle. In other words, the ellipse used to construct it is slightly smaller than that for a single pixel line size.

If the specified start or end point is at the centre of the ellipse, then the line that defines the start or end of the arc defaults to one extending vertically above the centre point.

If the start and end point are the same point or are points on the same line through the ellipse centre then a complete unfilled ellipse is drawn.

DrawEllipse()

Draws a bitmap at the specified point.

The point specifies the top left hand corner of the bitmap. The bitmap is compressed or stretched based on its internally stored size in twips.

Notes:

This member function uses the bitmap's size in twips and does a stretch/compress blit using a linear DDA.

As this function scales the bitmap, it is unavoidably slow. Therefore, where possible, use CBitmapContext::BitBlt() instead. If the bitmap has to be scaled, consider creating another bitmap along with an CFbsBitmapDevice etc, doing DrawBitmap() once and using BitBlt() subsequently.

Note that all bitmaps are clipped to the device boundaries.

TLinearDDA

Draws a bitmap to fit a given rectangle.

The bitmap is compressed or stretched based on its internally stored size in pixels.

Notes:

This member function uses the bitmap's size in pixels and does a stretch/compress blit using a linear DDA.

As this function scales the bitmap, it is unavoidably slow. Therefore, where possible, use CBitmapContext::BitBlt() instead. If the bitmap has to be scaled, consider creating another bitmap along with an CFbsBitmapDevice etc., doing DrawBitmap() once and using BitBlt() subsequently.

Note that all bitmaps are clipped to the device boundaries.

TLinearDDA

Draws a specified rectangle of a source bitmap to fit into a given destination rectangle.

Notes:

This member function uses rectangle sizes in pixels and does a stretch/compress blit using a linear DDA.

As this function scales the bitmap, it is unavoidably slow. Therefore, where possible, use CBitmapContext::BitBlt() instead. If the bitmap has to be scaled, consider creating another bitmap along with an CFbsBitmapDevice etc., doing DrawBitmap() once and using BitBlt() subsequently.

Note that all bitmaps are clipped to the device boundaries.

TLinearDDA

Draws a specified rectangle of a source bitmap to fit into a given rectangle using a given mask.

Notes:

This member function uses rectangle sizes in pixels and does a stretch/compress blit using a linear DDA.

Draws a specified rectangle from a wserv bitmap and its mask into another rectangle.

The function compresses/stretches the specified rectangle from the bitmap to fit the destination rectangle. The mask bitmap can be used as either a positive or negative mask. Masked pixels are not mapped to the destination rectangle.

A black and white (binary) mask bitmap is used. With aInvertMask=EFalse, black pixels in the mask bitmap stop corresponding pixels in the source bitmap from being transferred to the destination rectangle. With aInvertMask=ETrue, white pixels in the mask bitmap stop corresponding pixels in the source bitmap from being transferred to the destination rectangle.

Note: this member function uses rectangle sizes in pixels and does a stretch/compress blit using a linear DDA.

Draws and fills an ellipse.

The ellipse is drawn inside the rectangle defined by the TRect argument. Any rectangle that has odd pixel dimensions, has the bottom right corner trimmed to give even pixel dimensions before the ellipse is constructed.

Note:

A wide outline ellipse is drawn with the pixels distributed either side of a true ellipse, in such a way that the outer edge of the line touches the edge of the construction rectangle. In other words, the ellipse used to construct it is smaller than that for a single pixel line size.

Draws a straight line between two points.

Draws a straight line relative to the current drawing point, using a vector.

The start point of the line is the current drawing point. The specified vector is added to the drawing point to give the end point of the line

MoveTo()

MoveBy()

Draws a straight line from the current drawing point to a specified point.

MoveTo()

MoveBy()

Draws and fills a pie slice.

The pie slice is an area bounded by:

the arc of an ellipse drawn in an anticlockwise direction from the start point to the end point

the straight line drawn to the start point from the geometric centre of the ellipse.

the straight line to the end point from the geometric centre of the ellipse.

Notes:

A rectangle is used in the construction of the pie slice. This rectangle is passed as an argument of type TRect. The curved edge of the pie slice is an arc of an ellipse constructed within the rectangle.

The line drawn by the pen goes inside the specified rectangle.

The pixels at the end point of the arc are not drawn.

A wide line edged pie slice has the arc drawn with the pixels distributed either side of a true ellipse. This is done in such a way that the outer edge of the line touches the edge of the construction rectangle. In other words, the ellipse used to construct it is slightly smaller than that for a single pixel line size.

If the specified start or end point is at the centre of the ellipse, then the line that defines the start or end of the arc defaults to one extending vertically above the centre point.

If the start and end point are the same point or are points on the same line through the ellipse centre then a complete filled ellipse is drawn. A line is also drawn from the edge to the ellipse centre.

Draws a polyline from a set of points in an array.

A polyline is a series of concatenated straight lines joining a set of points.

Draws a polyline from a set of points in a list.

A polyline is a series of concatenated straight lines joining a set of points.