Anteckning
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The capPaletteManual macro requests that the capture driver manually sample video frames and create a new palette. You can use this macro or explicitly call the WM_CAP_PAL_MANUALCREATE message.
Syntax
BOOL capPaletteManual(
hwnd,
fGrab,
iColors
);
Parameters
hwnd
Handle to a capture window.
fGrab
Palette histogram flag. Set this parameter to TRUE for each frame included in creating the optimal palette. After the last frame has been collected, set this parameter to FALSE to calculate the optimal palette and send it to the capture driver.
iColors
Number of colors in the palette. The maximum value for this parameter is 256. This value is used only during collection of the first frame in a sequence.
Return value
Type: BOOL
Returns TRUE if successful or FALSE otherwise.If an error occurs and an error callback function is set using the capSetCallbackOnError macro, the error callback function is called.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | vfw.h |