windowscodecs: Add support for generating WICBitmapPaletteTypeFixedHalftone216 palette.

dlls/windowscodecs/palette.c

@@ -232,6 +232,34 @@ static WICColor *generate_halftone125_palette(UINT *count)
     return entries;
 }
 
+static WICColor *generate_halftone216_palette(UINT *count)
+{
+    WICColor *entries;
+    UINT i;
+
+    *count = 224;
+    entries = HeapAlloc(GetProcessHeap(), 0, 224 * sizeof(WICColor));
+    if (!entries) return NULL;
+
+    for (i = 0; i < 216; i++)
+    {
+        static const BYTE halftone_values[6] = { 0x00,0x33,0x66,0x99,0xcc,0xff };
+        entries[i] = 0xff000000;
+        entries[i] |= halftone_values[i%6];
+        entries[i] |= halftone_values[(i/6)%6] << 8;
+        entries[i] |= halftone_values[(i/36)%6] << 16;
+    }
+
+    for (i = 216; i < 224; i++)
+    {
+        static const DWORD halftone[8] = { 0xc0c0c0, 0x808080, 0x800000, 0x008000,
+                                           0x000080, 0x808000, 0x800080, 0x008080 };
+        entries[i] = 0xff000000;
+        entries[i] |= halftone[i-216];
+    }
+    return entries;
+}
+
 static WICColor *generate_halftone256_palette(UINT *count)
 {
     WICColor *entries;
@@ -312,6 +340,11 @@ static HRESULT WINAPI PaletteImpl_InitializePredefined(IWICPalette *iface,
         if (!colors) return E_OUTOFMEMORY;
         break;
 
+    case WICBitmapPaletteTypeFixedHalftone216:
+        colors = generate_halftone216_palette(&count);
+        if (!colors) return E_OUTOFMEMORY;
+        break;
+
     case WICBitmapPaletteTypeFixedHalftone256:
         colors = generate_halftone256_palette(&count);
         if (!colors) return E_OUTOFMEMORY;

dlls/windowscodecs/tests/palette.c

@@ -259,6 +259,30 @@ static void generate_halftone125_palette(DWORD *entries, UINT count)
     entries[i] = 0xffc0c0c0;
 }
 
+static void generate_halftone216_palette(DWORD *entries, UINT count)
+{
+    static const BYTE halftone_values[6] = { 0x00,0x33,0x66,0x99,0xcc,0xff };
+    UINT i;
+
+    assert(count == 224);
+
+    for (i = 0; i < 216; i++)
+    {
+        entries[i] = 0xff000000;
+        entries[i] |= halftone_values[i%6];
+        entries[i] |= halftone_values[(i/6)%6] << 8;
+        entries[i] |= halftone_values[(i/36)%6] << 16;
+    }
+
+    for (i = 216; i < 224; i++)
+    {
+        static const DWORD halftone[8] = { 0xc0c0c0, 0x808080, 0x800000, 0x008000,
+                                           0x000080, 0x808000, 0x800080, 0x008080 };
+        entries[i] = 0xff000000;
+        entries[i] |= halftone[i-216];
+    }
+}
+
 static void generate_halftone256_palette(DWORD *entries, UINT count)
 {
     static const BYTE halftone_values_b[4] = { 0x00,0x55,0xaa,0xff };
@@ -295,6 +319,7 @@ static void test_predefined_palette(void)
         { WICBitmapPaletteTypeFixedHalftone27, 0, 0, 28, { 0 } },
         { WICBitmapPaletteTypeFixedHalftone64, 0, 0, 72, { 0 } },
         { WICBitmapPaletteTypeFixedHalftone125, 0, 0, 126, { 0 } },
+        { WICBitmapPaletteTypeFixedHalftone216, 0, 0, 224, { 0 } },
         { WICBitmapPaletteTypeFixedHalftone256, 0, 0, 256, { 0 } },
     };
     IWICImagingFactory *factory;
@@ -358,6 +383,8 @@ static void test_predefined_palette(void)
                 generate_halftone64_palette(td[i].color, td[i].count);
             else if (td[i].type == WICBitmapPaletteTypeFixedHalftone125)
                 generate_halftone125_palette(td[i].color, td[i].count);
+            else if (td[i].type == WICBitmapPaletteTypeFixedHalftone216)
+                generate_halftone216_palette(td[i].color, td[i].count);
             else if (td[i].type == WICBitmapPaletteTypeFixedHalftone256)
                 generate_halftone256_palette(td[i].color, td[i].count);