Added some missing formats like DXGI_FORMAT_B8G8R8A8_UNORM to GetBitsPerPixel

Fixes #88

Author: sawickiap

src/D3D12MemAlloc.cpp

@@ -703,6 +703,10 @@ static UINT GetBitsPerPixel(DXGI_FORMAT format)
     case DXGI_FORMAT_R24_UNORM_X8_TYPELESS:
     case DXGI_FORMAT_X24_TYPELESS_G8_UINT:
         return 32;
+    case DXGI_FORMAT_B8G8R8A8_UNORM:
+    case DXGI_FORMAT_B8G8R8X8_UNORM:
+    case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
+        return 32;
     case DXGI_FORMAT_R8G8_TYPELESS:
     case DXGI_FORMAT_R8G8_UNORM:
     case DXGI_FORMAT_R8G8_UINT:
@@ -717,6 +721,9 @@ static UINT GetBitsPerPixel(DXGI_FORMAT format)
     case DXGI_FORMAT_R16_SNORM:
     case DXGI_FORMAT_R16_SINT:
         return 16;
+    case DXGI_FORMAT_B5G6R5_UNORM:
+    case DXGI_FORMAT_B5G5R5A1_UNORM:
+        return 16;
     case DXGI_FORMAT_R8_TYPELESS:
     case DXGI_FORMAT_R8_UNORM:
     case DXGI_FORMAT_R8_UINT: