From 1c270965a8c1f2dd9ec72c876a2ebbe8812febcc Mon Sep 17 00:00:00 2001
From: Jacek Caban <jacek@codeweavers.com>
Date: Mon, 16 Aug 2021 10:28:00 +0200
Subject: [PATCH] gdi32: Use NtGdiDoPalette for GetSystemPaletteEntries.

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
---
 dlls/gdi32/objects.c       | 44 ++++++++++++++++++++++++++++++++++++++
 dlls/gdi32/palette.c       | 44 ++++----------------------------------
 dlls/gdi32/tests/palette.c |  2 ++
 3 files changed, 50 insertions(+), 40 deletions(-)

diff --git a/dlls/gdi32/objects.c b/dlls/gdi32/objects.c
index 4f7932be329..38a26afe774 100644
--- a/dlls/gdi32/objects.c
+++ b/dlls/gdi32/objects.c
@@ -550,3 +550,47 @@ BOOL WINAPI AnimatePalette( HPALETTE palette, UINT start, UINT count, const PALE
 {
     return NtGdiDoPalette( palette, start, count, (void *)entries, NtGdiAnimatePalette, FALSE );
 }
+
+/* first and last 10 entries are the default system palette entries */
+static const PALETTEENTRY default_system_palette_low[] =
+{
+    { 0x00, 0x00, 0x00 }, { 0x80, 0x00, 0x00 }, { 0x00, 0x80, 0x00 }, { 0x80, 0x80, 0x00 },
+    { 0x00, 0x00, 0x80 }, { 0x80, 0x00, 0x80 }, { 0x00, 0x80, 0x80 }, { 0xc0, 0xc0, 0xc0 },
+    { 0xc0, 0xdc, 0xc0 }, { 0xa6, 0xca, 0xf0 }
+};
+static const PALETTEENTRY default_system_palette_high[] =
+{
+    { 0xff, 0xfb, 0xf0 }, { 0xa0, 0xa0, 0xa4 }, { 0x80, 0x80, 0x80 }, { 0xff, 0x00, 0x00 },
+    { 0x00, 0xff, 0x00 }, { 0xff, 0xff, 0x00 }, { 0x00, 0x00, 0xff }, { 0xff, 0x00, 0xff },
+    { 0x00, 0xff, 0xff }, { 0xff, 0xff, 0xff }
+};
+
+/***********************************************************************
+ *           GetSystemPaletteEntries    (GDI32.@)
+ *
+ * Gets range of palette entries.
+ */
+UINT WINAPI GetSystemPaletteEntries( HDC hdc, UINT start, UINT count, PALETTEENTRY *entries )
+{
+    UINT i, ret;
+
+    ret = NtGdiDoPalette( hdc, start, count, (void *)entries,
+                          NtGdiGetSystemPaletteEntries, FALSE );
+    if (ret) return ret;
+
+    /* always fill output, even if hdc is an invalid handle */
+    if (!entries || start >= 256) return 0;
+    if (start + count > 256) count = 256 - start;
+
+    for (i = 0; i < count; i++)
+    {
+        if (start + i < 10)
+            entries[i] = default_system_palette_low[start + i];
+        else if (start + i >= 246)
+            entries[i] = default_system_palette_high[start + i - 246];
+        else
+            memset( &entries[i], 0, sizeof(entries[i]) );
+    }
+
+    return 0;
+}
diff --git a/dlls/gdi32/palette.c b/dlls/gdi32/palette.c
index cd4fac217be..36335083c48 100644
--- a/dlls/gdi32/palette.c
+++ b/dlls/gdi32/palette.c
@@ -333,25 +333,12 @@ UINT WINAPI NtGdiGetSystemPaletteUse( HDC hdc )
 }
 
 
-/***********************************************************************
- * GetSystemPaletteEntries [GDI32.@]
- *
- * Gets range of palette entries.
- *
- * RETURNS
- *    Success: Number of entries retrieved from palette
- *    Failure: 0
- */
-UINT WINAPI GetSystemPaletteEntries(
-    HDC hdc,              /* [in]  Handle of device context */
-    UINT start,           /* [in]  Index of first entry to be retrieved */
-    UINT count,           /* [in]  Number of entries to be retrieved */
-    LPPALETTEENTRY entries) /* [out] Array receiving system-palette entries */
+static UINT get_system_palette_entries( HDC hdc, UINT start, UINT count, PALETTEENTRY *entries )
 {
     UINT ret = 0;
     DC *dc;
 
-    TRACE("hdc=%p,start=%i,count=%i\n", hdc,start,count);
+    TRACE( "hdc=%p,start=%i,count=%i\n", hdc, start, count );
 
     if ((dc = get_dc_ptr( hdc )))
     {
@@ -366,31 +353,6 @@ UINT WINAPI GetSystemPaletteEntries(
 /* null driver fallback implementation for GetSystemPaletteEntries */
 UINT CDECL nulldrv_GetSystemPaletteEntries( PHYSDEV dev, UINT start, UINT count, PALETTEENTRY *entries )
 {
-    if (entries && start < 256)
-    {
-        UINT i;
-        const RGBQUAD *default_entries;
-
-        if (start + count > 256) count = 256 - start;
-
-        default_entries = get_default_color_table( 8 );
-        for (i = 0; i < count; ++i)
-        {
-            if (start + i < 10 || start + i >= 246)
-            {
-                entries[i].peRed = default_entries[start + i].rgbRed;
-                entries[i].peGreen = default_entries[start + i].rgbGreen;
-                entries[i].peBlue = default_entries[start + i].rgbBlue;
-            }
-            else
-            {
-                entries[i].peRed = 0;
-                entries[i].peGreen = 0;
-                entries[i].peBlue = 0;
-            }
-            entries[i].peFlags = 0;
-        }
-    }
     return 0;
 }
 
@@ -671,6 +633,8 @@ LONG WINAPI NtGdiDoPalette( HGDIOBJ handle, WORD start, WORD count, void *entrie
         return set_palette_entries( handle, start, count, entries );
     case NtGdiGetPaletteEntries:
         return get_palette_entries( handle, start, count, entries );
+    case NtGdiGetSystemPaletteEntries:
+        return get_system_palette_entries( handle, start, count, entries );
     default:
         WARN( "invalid func %u\n", func );
         return 0;
diff --git a/dlls/gdi32/tests/palette.c b/dlls/gdi32/tests/palette.c
index 0043f5560c4..126a53310bd 100644
--- a/dlls/gdi32/tests/palette.c
+++ b/dlls/gdi32/tests/palette.c
@@ -323,6 +323,8 @@ static void test_system_palette_entries(void)
 
     metafile = CloseMetaFile(metafile_dc);
     DeleteMetaFile(metafile);
+
+    check_system_palette_entries(ULongToHandle(0xdeadbeef));
 }
 
 START_TEST(palette)