2011-12-27 21:18:07 +00:00
commit 9f98ea7e22
192 changed files with 77747 additions and 0 deletions
@@ -0,0 +1,60 @@
+// File: crn_utils.cpp
+#include "crn_core.h"
+#include "crn_utils.h"
+
+namespace crnlib
+{
+   namespace utils
+   {
+      void endian_switch_words(uint16* p, uint num)
+      {
+         uint16* p_end = p + num;
+         while (p != p_end)
+         {
+            uint16 k = *p;
+            *p++ = swap16(k);
+         }
+      }
+
+      void endian_switch_dwords(uint32* p, uint num)
+      {
+         uint32* p_end = p + num;
+         while (p != p_end)
+         {
+            uint32 k = *p;
+            *p++ = swap32(k);
+         }
+      }
+
+      void copy_words(uint16* pDst, const uint16* pSrc, uint num, bool endian_switch)
+      {
+         if (!endian_switch)
+            memcpy(pDst, pSrc, num << 1U);
+         else
+         {
+            uint16* pDst_end = pDst + num;
+            while (pDst != pDst_end)
+               *pDst++ = swap16(*pSrc++);
+         }
+      }
+      
+      uint compute_max_mips(uint width, uint height)
+      {
+         if ((width | height) == 0)
+            return 0;
+
+         uint num_mips = 1;
+
+         while ((width > 1U) || (height > 1U))
+         {
+            width >>= 1U;
+            height >>= 1U;
+            num_mips++;
+         }
+
+         return num_mips;
+      }
+
+   } // namespace utils
+
+} // namespace crnlib