In some circumstances the O3D plugin is briefly resized to zero height,...

core/cross/image_utils.h

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 61 matching lines @@
 // Gets the number of mip-maps required for a full chain starting at
 // width x height.
 inline unsigned int ComputeMipMapCount(
     unsigned int width, unsigned int height) {
   return 1 + base::bits::Log2Floor(std::max(width, height));
 }
 
 // Gets the smallest power-of-two value that is at least as high as
 // dimension. This is the POT dimension used in ScaleUpToPOT.
 inline unsigned int ComputePOTSize(unsigned int dimension) {
-  return 1 << base::bits::Log2Ceiling(dimension);
+  return (dimension == 0) ? 0 : 1 << base::bits::Log2Ceiling(dimension);
 }
 
 // Computes one dimension of a mip.
 inline unsigned ComputeMipDimension(int level, unsigned dimension) {
   unsigned v = dimension >> level;
   return v > 0 ? v : 1u;
 }
 
 // Computes the size of the buffer containing a mip-map chain, given its base
 // width, height, format and number of mip-map levels.
@@ skipping 186 matching lines @@
                       int* src_pitch,
                       int* dst_y,
                       int dst_width,
                       int* dst_height);
 
 }  // namespace image
 }  // namespace o3d
 
 #endif  // O3D_CORE_CROSS_IMAGE_UTILS_H_