2011-12-27 21:20:48 +00:00
parent 9f98ea7e22
commit db1ef59fe6
1 changed files with 29 additions and 0 deletions
@@ -0,0 +1,29 @@
+// File: ryg_dxt.hpp
+#pragma once
+
+#include "crn_ryg_types.hpp"
+
+namespace ryg_dxt
+{
+   extern sU8 Expand5[32];
+   extern sU8 Expand6[64];
+   extern sU8 OMatch5[256][2];
+   extern sU8 OMatch6[256][2];
+   extern sU8 OMatch5_3[256][2];
+   extern sU8 OMatch6_3[256][2];
+   extern sU8 QuantRBTab[256+16];
+   extern sU8 QuantGTab[256+16];
+
+   // initialize DXT codec. only needs to be called once.
+   void sInitDXT();
+
+   // input: a 4x4 pixel block, A8R8G8B8. you need to handle boundary cases
+   // yourself.
+   // alpha=sTRUE => use DXT5 (else use DXT1)
+   // quality: 0=fastest (no dither), 1=medium (dither)
+   void sCompressDXTBlock(sU8 *dest,const sU32 *src,sBool alpha,sInt quality);
+   
+   void sCompressDXT5ABlock(sU8 *dest,const sU32 *src,sInt quality);
+
+} // namespace ryg_dxt
+