Fixed a bug where the wrong number of mip levels would be generated if levels was zero and the lod offset was non-zero.

TRAC #13332

Signed-off-by: Jamie Madill
Signed-off-by: Shannon Woods
Author: Geoff Lang

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1970 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/renderer/TextureStorage11.cpp b/src/libGLESv2/renderer/TextureStorage11.cpp
index 9324a69..4c2189f 100644
--- a/src/libGLESv2/renderer/TextureStorage11.cpp
+++ b/src/libGLESv2/renderer/TextureStorage11.cpp
@@ -263,7 +263,7 @@
         D3D11_TEXTURE2D_DESC desc;
         desc.Width = width;      // Compressed texture size constraints?
         desc.Height = height;
-        desc.MipLevels = levels + mLodOffset;
+        desc.MipLevels = (levels > 0) ? levels + mLodOffset : 0;
         desc.ArraySize = 1;
         desc.Format = mTextureFormat;
         desc.SampleDesc.Count = 1;
@@ -485,7 +485,7 @@
         D3D11_TEXTURE2D_DESC desc;
         desc.Width = size;
         desc.Height = size;
-        desc.MipLevels = levels + mLodOffset;
+        desc.MipLevels = (levels > 0) ? levels + mLodOffset : 0;
         desc.ArraySize = 6;
         desc.Format = mTextureFormat;
         desc.SampleDesc.Count = 1;