IIXC_Page::GetPixelIndex Method
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The method retrieves the page palette's color index for the pixel at the specified coordinates.. | The method retrieves the page palette's color index for the pixel at the specified coordinates.. | ||
Revision as of 06:56, 23 May 2015
The method retrieves the page palette's color index for the pixel at the specified coordinates..
Syntax
HRESULT GetPixelIndex([in] LONG ptX,
[in] LONG ptY,
[in] LONG* pIndex);
Parameters
- ptX
- [in] Specifies x-coordinate of the pixel to be examined.
- ptY
- [in] Specifies y-coordinate of the pixel to be examined.
- pIndex
- [in] Pointer to LONG variable which will receive the index of the specified pixel's color within the page palette.
Return Value
Returns S_OK if operation was successful or error code in other cases.
Remarks
For indexed formats (1 bpp, and 8 bpp) the function will return the index of the pixel's color within the page palette; for grayscaled images (Gray, and Gray with Aplha) the function will return the gray level; for TrueColor formats index will contain -1.
