Returns or sets a value that determines the appearance of output.
[object.]DrawMode [= n]
| object | : Form or Printer object |
| n | : iexp |
Use this property to produce visual effects with the graphic output commands (Line, Circle, etc). Each pixel in the draw pattern is compared to the corresponding pixel in the existing background and then applies bit-wise operations.
| R2_BLACK | points are always black. |
| R2_WHITE | sets white points. |
| R2_NOP | points are not changed. |
| R2_NOT | point corresponds to the inverse of the screen color. |
| R2_COPYPEN | color set with Color. |
| R2_NOTCOPYPEN | inverse of color in Color |
| R2_MERGEPENNOT | set point corresponds to the pen color "or-ed" with the inverse screen color. |
| R2_MASKPENNOT | set points corresponds to pen color "and-ed" with inverse pen color. |
| R2_MERGENOTPEN | set point corresponds to screen color "and-ed" with the inverse pen color. |
| R2_MERGEPEN | point color corresponds to the pen color "or-ed" with the screen color. |
| R2_NOTMERGEPEN | inverse R2-MERGEPEN color. |
| R2_MASKPEN | point corresponds to colors in screen and pen (logical And). |
| R2_NOTMASKPEN | point corresponds to inverse R2-MASKPEN color. |
Using DrawMode without an object will affect the current active output object, usually Me (unless Output = Printer is used).
DrawMode is a get/put property and can be read as well.
OpenW 1
Local a%
RGBColor RGB(125, 125, 125), RGB(150, 100, 150)
DefFill 8
// Graphmode set to 1 as Default
PBox 10, 10, 100, 200
PBox 15, 15, 105, 205
KeyGet a% // Waiting for a key press
Cls
// OR operation
DrawMode = R2_MERGEPENNOT
PBox 10, 10, 100, 200
PBox 15, 15, 105, 205
KeyGet a% // Waiting for a key press
Cls
// XOR operation
DrawMode = R2_XORPEN
PBox 10, 10, 100, 200
PBox 15, 15, 105, 205
KeyGet a% // Waiting for a key press
Cls
// AND operation
DrawMode = R2_MASKPEN
PBox 10, 10, 100, 200
PBox 15, 15, 105, 205
KeyGet a% // Waiting for a key press
CloseW 1
Draws two rectangules, one over the other, in four different draw modes.
DrawMode is the VB compatible implementation of the GFA-BASIC GraphMode command. In addition, DrawMode is a property.
{Created by Sjouke Hamstra; Last updated: 13/09/2021 by James Gaite; Other Contributors: Jean-Marie Melanson}