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win32 clipboard: fix for BI_ALPHABITFIELDS narrow support (#5586)

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* win32 clipbaord: fix for BI_ALPHABITFIELDS narrow support

* Define BI_ALPHABITFIELDS even if wingdi headers are already included

since BI_ALPHABITFIELDS is not always defined there
This commit is contained in:
Krzysztof Szenk
2026-02-24 12:56:16 +01:00
committed by GitHub
parent 29b5844119
commit 4ebe7d6215
1 changed files with 3 additions and 1 deletions
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4
src/external/win32_clipboard.h vendored
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@@ -178,7 +178,9 @@ typedef struct tagRGBQUAD {
#define BI_CMYK 0x000B
#define BI_CMYKRLE8 0x000C
#define BI_CMYKRLE4 0x000D
#endif
#ifndef BI_ALPHABITFIELDS
// Bitmap not compressed and that the color table consists of four DWORD color masks,
// that specify the red, green, blue, and alpha components of each pixel
#define BI_ALPHABITFIELDS 0x0006
@@ -317,7 +319,7 @@ static int GetPixelDataOffset(BITMAPINFOHEADER bih)
// If (bih.biCompression == BI_RGB) no need to be offset more
if (bih.biCompression == BI_BITFIELDS) offset += 3*rgbaSize;
else if (bih.biCompression == BI_ALPHABITFIELDS) offset += 4*rgbaSize; // Not widely supported, but valid
else if (bih.biCompression == BI_ALPHABITFIELDS) offset += 4 * rgbaSize; // Not widely supported, but valid
}
}