IIXC_Page::GetPixelIndex Method
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== Syntax == | == Syntax == | ||
| − | <pre class="brush:cpp;gutter:false">HRESULT GetPixelIndex([in] LONG | + | <pre class="brush:cpp;gutter:false">HRESULT GetPixelIndex([in] LONG nX, |
| − | [in] LONG | + | [in] LONG nY, |
| − | [in] LONG* | + | [in] LONG* nIndex);</pre> |
== Parameters == | == Parameters == | ||
| − | ; | + | ;nX |
:[in] Specifies x-coordinate of the pixel to be examined. | :[in] Specifies x-coordinate of the pixel to be examined. | ||
| − | ; | + | ;nY |
:[in] Specifies y-coordinate of the pixel to be examined. | :[in] Specifies y-coordinate of the pixel to be examined. | ||
| − | ; | + | ;nIndex |
:[in] Pointer to LONG variable which will receive the index of the specified pixel's color within the page palette. | :[in] Pointer to LONG variable which will receive the index of the specified pixel's color within the page palette. | ||
Latest revision as of 02:16, 15 June 2015
The method retrieves the page palette's color index for the pixel at the specified coordinates..
Syntax
HRESULT GetPixelIndex([in] LONG nX,
[in] LONG nY,
[in] LONG* nIndex);
Parameters
- nX
- [in] Specifies x-coordinate of the pixel to be examined.
- nY
- [in] Specifies y-coordinate of the pixel to be examined.
- nIndex
- [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.
