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improve handling of inverted pointer colors

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This commit is contained in:
Norbert Federa 2015-09-03 16:50:41 +02:00
parent 72d901454c
commit 1791d42a5d
1 changed files with 24 additions and 5 deletions
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29
libfreerdp/codec/color.c
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@ -1418,6 +1418,25 @@ void freerdp_alpha_cursor_convert(BYTE* alphaData, BYTE* xorMask, BYTE* andMask,
}
}
static INLINE UINT32 freerdp_image_inverted_pointer_color(int x, int y)
{
#if 1
/**
* Inverted pointer colors (where individual pixels can change their
* color to accommodate the background behind them) only seem to be
* supported on Windows.
* Using a static replacement color for these pixels (e.g. black)
* might result in invisible pointers depending on the background.
* This function returns either black or white, depending on the
* pixel's position.
*/
return (x + y) & 1 ? 0xFF000000 : 0xFFFFFFFF;
#else
return 0xFF000000;
#endif
}
/**
* Drawing Monochrome Pointers:
* http://msdn.microsoft.com/en-us/library/windows/hardware/ff556143/
@ -1520,7 +1539,7 @@ int freerdp_image_copy_from_pointer_data(BYTE* pDstData, UINT32 DstFormat,
else if (andPixel && !xorPixel)
*pDstPixel++ = 0x00000000; /* transparent */
else if (andPixel && xorPixel)
*pDstPixel++ = 0xFF000000; /* inverted (set as black) */
*pDstPixel++ = freerdp_image_inverted_pointer_color(x, y); /* inverted */
}
pDstPixel = (UINT32*) &((BYTE*) pDstPixel)[nDstPad];
@ -1606,10 +1625,10 @@ int freerdp_image_copy_from_pointer_data(BYTE* pDstData, UINT32 DstFormat,
{
const UINT32 xorPixelMasked = xorPixel | 0xFF000000;
if (xorPixelMasked == 0xFF000000) /* black */
*pDstPixel++ = 0x00000000; /* transparent */
else if (xorPixelMasked == 0xFFFFFFFF) /* white */
*pDstPixel++ = 0xFF000000; /* inverted (set as black) */
if (xorPixelMasked == 0xFF000000) /* black -> transparent */
*pDstPixel++ = 0x00000000;
else if (xorPixelMasked == 0xFFFFFFFF) /* white -> inverted */
*pDstPixel++ = freerdp_image_inverted_pointer_color(x, y);
else
*pDstPixel++ = xorPixel;
}