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Editor/Util/dxtlib.h

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+/*********************************************************************NVMH2****
+Path:  C:\Dev\devrel\Nv_sdk_4\Dx8_private\PhotoShop\dxtlib
+File:  dxtlib.h
+
+Copyright (C) 1999, 2000 NVIDIA Corporation
+This file is provided without support, instruction, or implied warranty of any
+kind.  NVIDIA makes no guarantee of its fitness for a particular purpose and is
+not liable under any circumstances for any damages or loss whatsoever arising
+from the use or inability to use this file or items derived from it.
+
+Comments:
+
+
+******************************************************************************/
+
+
+
+
+
+typedef HRESULT (*MIPcallback)(void * data, int miplevel, DWORD size);
+// call back
+// pointer to data
+// mip level
+// size of chunk
+
+
+/*
+   Compresses an image with a user supplied callback with the data for each MIP level created
+   Only supports input of RGB 24 or ARGB 32 bpp
+*/
+HRESULT nvDXTcompress(unsigned char * raw_data, // pointer to data (24 or 32 bit)
+                unsigned long w, // width in texels
+                unsigned long h, // height in texels
+                DWORD TextureFormat, // list below
+                bool bGenMipMaps,    // auto gen MIP maps
+                bool bDither,
+                DWORD depth, // 3 or 4
+                MIPcallback callback = 0);   // callback for generated levels
+// if callback is == 0 (or not specified), then WriteDTXnFile is called with all file info
+//
+// You must write the routines (or provide stubs)
+// void WriteDTXnFile(count, buffer);
+// void ReadDTXnFile(count, buffer);
+// 
+//
+/* returns 
+  w width
+  h height
+  depth ( 3 or 4)
+  total_width 
+  rowBytes - pitch
+
+*/
+unsigned char * nvDXTdecompress(int & w, int & h, int & depth, int & total_width, int & rowBytes);
+
+
+// see examples
+
+
+void WriteDTXnFile(DWORD count, void * buffer);
+void ReadDTXnFile(DWORD count, void * buffer);
+
+
+// TextureFormat
+#define TF_DXT1            10
+#define TF_DXT1_1BitAlpha  11
+#define TF_DXT3            12
+#define TF_DXT5            13
+#define TF_RGB4444         14
+#define TF_RGB1555         15
+#define TF_RGB565          16
+#define TF_RGB8888         17
+
+
+#define DXTERR_INPUT_POINTER_ZERO -1
+#define DXTERR_DEPTH_IS_NOT_3_OR_4 -2
+#define DXTERR_NON_POWER_2 -3
+