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New WINDEV, WEBDEV, WINDEV Mobile 24 feature!
  • Anti-aliasing
WINDEV
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WEBDEV
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WINDEV Mobile
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Stored procedures
Changes the drawing mode used by the drawing functions (<Image>.DrawLine, <Image>.DrawRectangle, etc.) in an Image control.
Example
// Draws a rectangle and erases it
IMG_Drawing.ChangeMode(drawXOR)
// Displays the rectangle (in XOR mode)
IMG_Drawing.DrawRectangle(0, 0, 100, 100)
Multitask(10)
// Erases the rectangle
IMG_Drawing.DrawRectangle(0, 0, 100, 100)
Syntax
<Image control>.ChangeMode(<New mode>)
<Image control>: Control name
Name of Image control to use.
<New mode>: Integer constant
Mode for drawing in the image:
drawAntiAliasingUses the GDI+ and/or the features of the video card to draw the lines and the circles without jagged effects. This drawing mode is slower but the results are better than with the standard mode.
Windows Mobile Constant not available.
drawDefaultStandard colors.
drawXORColors applied via an "exclusive or" operation with the background. Erases a drawing if this option is used twice.
CAUTION: This drawing mode is not compatible with the management of opacity (the drawing is not erased anymore).
Caution:
  • The drawing in XOR mode is available for the Image controls only. The drawing in XOR mode is not available for the Image variables.
  • The drawXOR constant cannot be combined with the drawAntiAliasing constant.
Remarks
WINDEVWEBDEV - Server codeReports and QueriesWindowsiPhone/iPadUser code (UMC)

Anti-aliasing

The anti-aliasing consists in drawing the lines and the circles without jagged effects. This feature requires the GDI+ framework (which means the WINDEV framework).
Example:
Limits:
  • <Image>.DrawChord is not supported in this mode.
  • To avoid the jagged edges, the colors and the lines of elements are smoothed out. Some drawing functions can have an unexpected behavior because the specified colors are no longer found. For example, if a borderline color is specified for <Image>.Fill, this color is not found: the entire area is filled up.
  • For a drawing with anti-aliasing, <Image>.DrawPolygon and <Image>.DrawSlice will have the following behavior. The outline is drawn above the inside of polygon: therefore, the line is partly combined with the inside of polygon. If the line thickness is quite big, the line will be displayed in two colors.
  • See GDI+ framework for more details.
Related Examples:
The drawing functions Unit examples (WINDEV): The drawing functions
[ + ] Using the main drawing functions of WINDEV to:
- Initialize an Image control for drawing
- Draw simple shapes
- Write a text into a drawing
- Change the color in a drawing
Component : wd240pnt.dll
Minimum required version
  • Version 24
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