IIXC_Page::GetPixel Method
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== Syntax == | == Syntax == | ||
| − | <pre class="brush:cpp;gutter:false">HRESULT GetPixel([in] LONG | + | <pre class="brush:cpp;gutter:false">HRESULT GetPixel([in] LONG nX, |
| − | [in] LONG | + | [in] LONG nY, |
| − | [out, retval] ULONG* | + | [out, retval] ULONG* nColor);</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. | ||
| − | ; | + | ;nColor |
:[out, retval] Pointer to ULONG variable which will receive the color of the pixel. This parameter cannot be NULL. | :[out, retval] Pointer to ULONG variable which will receive the color of the pixel. This parameter cannot be NULL. | ||
Latest revision as of 02:16, 15 June 2015
The method retrieves the color value of the pixel at the specified coordinates.
Syntax
HRESULT GetPixel([in] LONG nX,
[in] LONG nY,
[out, retval] ULONG* nColor);
Parameters
- nX
- [in] Specifies x-coordinate of the pixel to be examined.
- nY
- [in] Specifies y-coordinate of the pixel to be examined.
- nColor
- [out, retval] Pointer to ULONG variable which will receive the color of the pixel. This parameter cannot be NULL.
Return Value
Returns S_OK if operation was successful or error code in other cases.
Remarks
For all raster internal formats, the function returns the red, green, and blue components of the pixel's color. If the page has an alpha channel (Gray with Alpha, or TrueColor with Alpha), the high-order byte of the color will contain the value of the specified pixel's alpha channel. For indexed images, the high-order byte will contain the page palette index of the pixel's color.
