The GetMapMode function retrieves the current mapping mode.
int GetMapMode(
| HDC hdc | // handle of device context |
| ); |
Parameters
hdc
Identifies the device context.
Return Values
If the function succeeds, the return value specifies the mapping mode.
If the function fails, the return value is zero.
Remarks
The following list describes the various mapping modes:
| Value | Description |
| MM_ANISOTROPIC | Logical units are mapped to arbitrary units with arbitrarily scaled axes. Use the SetWindowExtEx and SetViewportExtEx functions to specify the units, orientation, and scaling that you want. |
| MM_HIENGLISH | Each logical unit is mapped to 0.001 inch. Positive x is to the right; positive y is up. |
| MM_HIMETRIC | Each logical unit is mapped to 0.01 millimeter. Positive x is to the right; positive y is up. |
| MM_ISOTROPIC | Logical units are mapped to arbitrary units with equally scaled axes; that is, one unit along the x-axis is equal to one unit along the y-axis. Use the SetWindowExtEx and SetViewportExtEx functions to specify the units and the orientation of the axes that you want. Graphics device interface makes adjustments as necessary to ensure the x and y units remain the same size (for example, if you set the window extent, the viewport will be adjusted to keep the units isotropic). |
| MM_LOENGLISH | Each logical unit is mapped to 0.01 inch. Positive x is to the right; positive y is up. |
| MM_LOMETRIC | Each logical unit is mapped to 0.1 millimeter. Positive x is to the right; positive y is up. |
| MM_TEXT | Each logical unit is mapped to one device pixel. Positive x is to the right; positive y is down. |
| MM_TWIPS | Each logical unit is mapped to one twentieth of a printer's point (1/1440 inch, also called a "twip"). Positive x is to the right; positive y is up. |
See Also