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virtual L_INT LBitmapBase::IsGrayScale()
Returns an indicator that shows the kind of grayscale palette, if any, that a bitmap has.
| Value | Meaning |
|---|---|
| GRAY_NO | [0] Not grayscale. |
| GRAY_ORDEREDNORMAL | [1] Normally ordered grayscale (dark to light). |
| GRAY_ORDEREDINVERSE | [2] Reverse ordered grayscale (light to dark). |
| GRAY_NOTORDERED | [3] Unordered grayscale. |
Grayscale images can be 1-bit, 4-bit, 8-bit, 12-bit or 16-bit. With a 1-bit image, you can use this function to check for inversion (for example, white lines on a black background) caused by an inverted palette.
Support for 12 and 16-bit grayscale images is only available in the Document/Medical toolkits.
Win32, x64.
For an example, refer to LBitmapBase::GrayScale.
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