initial import

FastDXT/example.cpp

@@ -0,0 +1,89 @@
+/******************************************************************************
+ * Fast DXT - a realtime DXT compression tool
+ *
+ * Author : Luc Renambot
+ *
+ * Copyright (C) 2007 Electronic Visualization Laboratory,
+ * University of Illinois at Chicago
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either Version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser Public License along
+ * with this library; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *****************************************************************************/
+
+#include "libdxt.h"
+
+int
+main(int argc, char** argv)
+{
+  byte *in;
+  byte *out;
+  int nbbytes;
+
+	// Initialize some timing functions and else
+  aInitialize();
+
+  /*
+    Read an image.
+  */    
+  unsigned long width = atoi(argv[1]);
+  unsigned long height = atoi(argv[2]);
+
+  in = (byte*)memalign(16, width*height*4);
+  memset(in, 0, width*height*4);
+  
+  FILE *f=fopen(argv[3], "rb");
+  fread(in, 1, width*height*4, f);
+  fclose(f);
+
+  out = (byte*)memalign(16, width*height*4);
+  memset(out, 0, width*height*4);
+
+  fprintf(stderr, "Converting from raw: %ldx%ld\n", width, height);
+
+#define NUM_LOOPS 100
+
+  double t1, t2;
+
+  t1 = aTime();
+  for (int k=0;k<NUM_LOOPS;k++)
+    {
+      //CompressDXT(in, out, width, height, FORMAT_DXT5YCOCG, 4);
+      //CompressDXT(in, out, width, height, FORMAT_DXT5, 4);
+      CompressDXT(in, out, width, height, FORMAT_DXT1, 2);
+    }
+  t2 = aTime();
+
+  fprintf(stderr, "Time %.2f sec, Single %.2f sec, Freq %.2f Hz\n",
+	  t2-t1, (t2-t1)/(double)NUM_LOOPS, ((double)NUM_LOOPS)/(t2-t1) );
+  fprintf(stderr, "MP/sec %.2f\n",
+	  ((double)(width*height*NUM_LOOPS)) / ((t2-t1)*1000000.0) );
+
+#if 1
+  FILE *g=fopen("out.dxt", "wb+");
+  fwrite(&width, 4, 1, g);
+  fwrite(&height, 4, 1, g);
+  //nbbytes = width * height * 4 / 4; //DXT5
+  nbbytes = width * height * 3 / 6; // DXT1
+  fwrite(out, 1, nbbytes, g);
+  fclose(g);
+#endif
+
+  memfree(in);
+  memfree(out);
+
+  return 0;
+}
+
+