GetMapMode
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