win32u: Add support for undocummented DIB_PAL_INDICES color usage in SetDIBits.

dlls/gdi32/tests/bitmap.c

@@ -915,7 +915,7 @@ static void test_dib_formats(void)
     char data[2048];  /* 2 x 2 pixels, max 64 bits-per-pixel, max 64 planes */
     void *bits;
     int planes, bpp, compr, format;
-    HBITMAP hdib, hbmp;
+    HBITMAP hdib, hbmp, hbmp_mono;
     HDC hdc, memdc;
     UINT ret;
     BOOL format_ok, expect_ok;
@@ -924,6 +924,7 @@ static void test_dib_formats(void)
     hdc = GetDC( 0 );
     memdc = CreateCompatibleDC( 0 );
     hbmp = CreateCompatibleBitmap( hdc, 10, 10 );
+    hbmp_mono = CreateBitmap( 10, 10, 1, 1, NULL );
 
     memset( data, 0xaa, sizeof(data) );
 
@@ -1203,6 +1204,8 @@ static void test_dib_formats(void)
     DeleteObject( hdib );
     ret = SetDIBits(hdc, hbmp, 0, 1, data, bi, DIB_PAL_COLORS+1);
     ok( !ret, "SetDIBits succeeded with DIB_PAL_COLORS+1\n" );
+    ret = SetDIBits(hdc, hbmp_mono, 0, 1, data, bi, DIB_PAL_COLORS+1);
+    ok( ret, "SetDIBits failed with DIB_PAL_COLORS+1\n" );
     ret = SetDIBitsToDevice( memdc, 0, 0, 1, 1, 0, 0, 0, 1, data, bi, DIB_PAL_COLORS+1 );
     ok( ret, "SetDIBitsToDevice failed with DIB_PAL_COLORS+1\n" );
     ret = StretchDIBits( memdc, 0, 0, 1, 1, 0, 0, 1, 1, data, bi, DIB_PAL_COLORS+1, SRCCOPY );
@@ -1227,6 +1230,8 @@ static void test_dib_formats(void)
     DeleteObject( hdib );
     ret = SetDIBits(hdc, hbmp, 0, 1, data, bi, DIB_PAL_COLORS+2);
     ok( !ret, "SetDIBits succeeded with DIB_PAL_COLORS+2\n" );
+    ret = SetDIBits(hdc, hbmp_mono, 0, 1, data, bi, DIB_PAL_COLORS+2);
+    ok( !ret, "SetDIBits succeeded with DIB_PAL_COLORS+2\n" );
     ret = SetDIBitsToDevice( memdc, 0, 0, 1, 1, 0, 0, 0, 1, data, bi, DIB_PAL_COLORS+2 );
     ok( !ret, "SetDIBitsToDevice succeeded with DIB_PAL_COLORS+2\n" );
     ret = StretchDIBits( memdc, 0, 0, 1, 1, 0, 0, 1, 1, data, bi, DIB_PAL_COLORS+2, SRCCOPY );
@@ -1285,6 +1290,7 @@ static void test_dib_formats(void)
 
     DeleteDC( memdc );
     DeleteObject( hbmp );
+    DeleteObject( hbmp_mono );
     ReleaseDC( 0, hdc );
     HeapFree( GetProcessHeap(), 0, bi );
 }

dlls/win32u/dib.c

@@ -205,9 +205,11 @@ static BOOL bitmapinfo_from_user_bitmapinfo( BITMAPINFO *dst, const BITMAPINFO *
 {
     void *src_colors;
 
-    if (coloruse > DIB_PAL_COLORS + 1) return FALSE;  /* FIXME: handle DIB_PAL_COLORS+1 format */
+    if (coloruse > DIB_PAL_INDICES) return FALSE;
     if (!bitmapinfoheader_from_user_bitmapinfo( &dst->bmiHeader, &info->bmiHeader )) return FALSE;
     if (!is_valid_dib_format( &dst->bmiHeader, allow_compression )) return FALSE;
+    if (coloruse == DIB_PAL_INDICES && (dst->bmiHeader.biBitCount != 1 ||
+                dst->bmiHeader.biCompression != BI_RGB)) return FALSE;
 
     src_colors = (char *)info + info->bmiHeader.biSize;
 
@@ -230,6 +232,18 @@ static BOOL bitmapinfo_from_user_bitmapinfo( BITMAPINFO *dst, const BITMAPINFO *
             memcpy( dst->bmiColors, src_colors, colors * sizeof(WORD) );
             max_colors = colors;
         }
+        else if (coloruse == DIB_PAL_INDICES)
+        {
+            dst->bmiColors[0].rgbRed = 0;
+            dst->bmiColors[0].rgbGreen = 0;
+            dst->bmiColors[0].rgbBlue = 0;
+            dst->bmiColors[0].rgbReserved = 0;
+            dst->bmiColors[1].rgbRed = 0xff;
+            dst->bmiColors[1].rgbGreen = 0xff;
+            dst->bmiColors[1].rgbBlue = 0xff;
+            dst->bmiColors[1].rgbReserved = 0;
+            colors = max_colors;
+        }
         else if (info->bmiHeader.biSize != sizeof(BITMAPCOREHEADER))
         {
             memcpy( dst->bmiColors, src_colors, colors * sizeof(RGBQUAD) );
@@ -675,7 +689,7 @@ INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
     INT src_to_dst_offset;
     HRGN clip = 0;
 
-    if (!bitmapinfo_from_user_bitmapinfo( src_info, info, coloruse, TRUE ) || coloruse > DIB_PAL_COLORS)
+    if (!bitmapinfo_from_user_bitmapinfo( src_info, info, coloruse, TRUE ))
     {
         RtlSetLastWin32Error( ERROR_INVALID_PARAMETER );
         return 0;
@@ -699,6 +713,8 @@ INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
 
     if (!(bitmap = GDI_GetObjPtr( hbitmap, NTGDI_OBJ_BITMAP ))) return 0;
 
+    if (coloruse == DIB_PAL_INDICES && bitmap->dib.dsBm.bmBitsPixel != 1) return 0;
+
     if (src_info->bmiHeader.biCompression == BI_RLE4 || src_info->bmiHeader.biCompression == BI_RLE8)
     {
         if (lines == 0) goto done;

dlls/win32u/ntgdi_private.h

@@ -28,6 +28,9 @@
 /* extra stock object: default 1x1 bitmap for memory DCs */
 #define DEFAULT_BITMAP (STOCK_LAST+1)
 
+/* Undocumented value for DIB's color use: indicates a mono DIB w/o pal entries */
+#define DIB_PAL_INDICES 2
+
 struct gdi_obj_funcs
 {
     INT     (*pGetObjectW)( HGDIOBJ handle, INT count, LPVOID buffer );