1 files changed, 99 insertions, 0 deletions
diff --git a/dgedit/mipmap.cc b/dgedit/mipmap.cc
new file mode 100644
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+++ b/dgedit/mipmap.cc
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            mipmap.cc
+ *
+ *  Fri Sep  3 16:39:46 CEST 2010
+ *  Copyright 2010 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "mipmap.h"
+
+MipMap::MipMap(float *data, size_t size)
+{
+  this->data = data;
+  this->size = size;
+  this->zoom = 1;
+}
+
+MipMapValue MipMap::data_lookup(size_t begin, size_t end)
+{
+  MipMapValue val;
+
+  size_t numlavg = 0;
+  size_t numuavg = 0;
+  for(size_t i = begin; i <= end; i++) {
+    if(i > size || i < 0) break;
+    if(data[i] > val.max) val.max = data[i];
+    if(data[i] < val.min) val.min = data[i];
+    
+    if(data[i] > 0) { val.uavg += data[i]; numuavg++; }
+    if(data[i] < 0) { val.lavg += data[i]; numlavg++; }
+  }
+  
+  if(numlavg) val.lavg /= (float) numlavg;
+  if(numuavg) val.uavg /= (float) numuavg;
+
+  return val;
+}
+
+MipMapValue MipMap::mipmap_lookup(size_t begin, size_t end)
+{
+  MipMapValue val;
+
+  size_t numlavg = 0;
+  size_t numuavg = 0;
+  for(size_t i = begin; i <= end; i++) {
+    if(i > size || i < 0) break;
+    if(data[i] > val.max) val.max = data[i];
+    if(data[i] < val.min) val.min = data[i];
+    
+    if(data[i] > 0) { val.uavg += data[i]; numuavg++; }
+    if(data[i] < 0) { val.lavg += data[i]; numlavg++; }
+  }
+  
+  if(numlavg) val.lavg /= (float) numlavg;
+  if(numuavg) val.uavg /= (float) numuavg;
+
+  return val;
+}
+
+#define ABS(x) (x>0?x:-x)
+
+MipMapValue MipMap::lookup(size_t begin, size_t end)
+{
+  return data_lookup(begin, end);
+  /*
+
+  size_t zoom_factor = ABS(end - begin);
+
+  if(zoom_factor < zoom / 2) {
+    if(zoom == 1) { // Lookup in original data.
+      return data_lookup(begin, end);
+    }
+
+    return mipmap_lookup(begin, end);
+  }
+
+  if(lowerlevel) return lowerlevel->lookup(begin,end);
+
+  return MipMapValue();
+  */
+}