CreateDIBSection ignores the supplied values of biClrUsed and

biClrImportant and calculates them from biBitCount.

CreateDIBSection ignores the supplied values of biClrUsed and
d7a9d4bd · Huw Davies · Alexandre Julliard · 4c7b65db · d7a9d4bd
Commit d7a9d4bd authored Nov 11, 2003 by Huw Davies Committed by Alexandre Julliard Nov 11, 2003
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dib.c objects/dib.c +6 -0

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--- a/objects/dib.c
+++ b/objects/dib.c
@@ -897,6 +897,12 @@ HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
        bDesktopDC = TRUE;
    }

+    /* Windows ignores the supplied values of biClrUsed and biClrImportant thus: */
+    if (bmi->bmiHeader.biBitCount >= 1 && bmi->bmiHeader.biBitCount <= 8)
+        bmi->bmiHeader.biClrUsed = bmi->bmiHeader.biClrImportant = 1L << bmi->bmiHeader.biBitCount;
+    else
+        bmi->bmiHeader.biClrUsed = bmi->bmiHeader.biClrImportant = 0;
+
    if ((dc = DC_GetDCPtr( hdc )))
    {
        hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);