IIXC_Page::GetPixelIndex Method

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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.

See Also

IIXC_Page
IIXC_Page::GetPixel
IIXC_Page::SetPixel
IIXC_Page::SetPixelIndex