COLORKEY
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4/8/2010
This structure communicates color key information between the renderer and another filter.
Syntax
typedef struct tagCOLORKEY{
DWORD KeyType;
DWORD PaletteIndex;
COLORREF LowColorValue;
COLORREF HighColorValue;
} COLORKEY;
Members
- KeyType
Key type. Can be CK_NOCOLORKEY, CK_INDEX, or CK_RGB. CK_INDEX and CK_RGB can be logically combined.
- PaletteIndex
Palette index.
- LowColorValue
Lowest RGB color value.
- HighColorValue
Highest RGB color value.
Remarks
The video renderer supports a data transport accessed through the IOverlay interface.
This will typically be used by hardware decoder filters that need the renderer to communicate where to put the data rather than requiring the renderer to draw the data.
One mechanism for communicating where to put the images is by using a color key. This structure is used by a filter (typically a hardware decoder) to describe color key requirements to the video renderer.
Requirements
| Header | dshow.h |
| Windows Embedded CE | Windows CE 2.12 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment, Version 2.12 requires DXPAK 1.0 or later |