X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=helpers%2Fd3dsize.hpp;h=9f662971f21cc82a7745bd3cc96770383da23e04;hb=fa24288b9a0c605abe08aa12a397e2d3f5276af3;hp=31fcd740a95c55d2bc645e6d58191f984821c891;hpb=acc9062e7df12764ba1a01bebacbff524e9a3f8a;p=apitrace

diff --git a/helpers/d3dsize.hpp b/helpers/d3dsize.hpp
index 31fcd74..9f66297 100644
--- a/helpers/d3dsize.hpp
+++ b/helpers/d3dsize.hpp
@@ -139,17 +139,24 @@ _getLockSize(D3DFORMAT Format, UINT Width, UINT Height, INT RowPitch, UINT Depth
     case D3DFMT_DXT3:
     case D3DFMT_DXT4:
     case D3DFMT_DXT5:
-    case D3DFMT_ATI1:
-    case D3DFMT_ATI2:
-        Width /= 4;
-        Height /= 4;
+        Width  = (Width  + 3) / 4;
+        Height = (Height + 3) / 4;
+        break;
+
+    case D3DFMT_ATI1N:
+    case D3DFMT_ATI2N:
+        /*
+         * Because these are unsupported formats, RowPitch is not set to the
+         * number of bytes between row of blocks, but instead in such way that
+         * Height * RowPitch will match the expected size.
+         */
         break;
 
     case D3DFMT_UYVY:
     case D3DFMT_R8G8_B8G8:
     case D3DFMT_YUY2:
     case D3DFMT_G8R8_G8B8:
-        Width /= 2;
+        Width = (Width + 1) / 2;
         break;
 
     case D3DFMT_NV12: