IIXC_Page::GetPixelIndex Method

Revision as of 05:50, 18 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.

See Also

IIXC_Page

IIXC_Page::GetPixel

IIXC_Page::SetPixel

IIXC_Page::SetPixelIndex