D2D1_MAP_OPTIONS enumeration
Specifies how the memory to be mapped from the corresponding ID2D1Bitmap1 should be treated.
Syntax
typedef enum { D2D1_MAP_OPTIONS_READ = 1, D2D1_MAP_OPTIONS_WRITE = 2, D2D1_MAP_OPTIONS_DISCARD = 4 } D2D1_MAP_OPTIONS;
Constants
- D2D1_MAP_OPTIONS_READ
-
Allow CPU Read access.
- D2D1_MAP_OPTIONS_WRITE
-
Allow CPU Write access.
- D2D1_MAP_OPTIONS_DISCARD
-
Discard the previous contents of the resource when it is mapped.
Remarks
The D2D1_MAP_OPTIONS_READ option can be used only if the bitmap was created with the D2D1_BITMAP_OPTIONS_CPU_READ flag.
These flags will be not be able to be used on bitmaps created by the ID2D1DeviceContext. However, the ID2D1SourceTransform will receive bitmaps for which these flags are valid.
D2D1_MAP_OPTIONS_DISCARD can only be used with D2D1_MAP_OPTIONS_WRITE. Both of these options are only available through the effect author API, not through the Direct2D rendering API.
Requirements
|
Minimum supported client |
Windows 8 and Platform Update for Windows 7 [desktop apps | Windows Store apps] |
|---|---|
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Minimum supported server |
Windows Server 2012 and Platform Update for Windows Server 2008 R2 [desktop apps | Windows Store apps] |
|
Minimum supported phone |
Windows Phone 8.1 [Windows Phone Silverlight 8.1 and Windows Runtime apps] |
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Header |
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See also