Import code from previous AssetBuilder version

thirdparty/libsquish/colourfit.cpp

@@ -0,0 +1,54 @@
+/* -----------------------------------------------------------------------------
+
+    Copyright (c) 2006 Simon Brown                          si@sjbrown.co.uk
+
+    Permission is hereby granted, free of charge, to any person obtaining
+    a copy of this software and associated documentation files (the
+    "Software"), to deal in the Software without restriction, including
+    without limitation the rights to use, copy, modify, merge, publish,
+    distribute, sublicense, and/or sell copies of the Software, and to
+    permit persons to whom the Software is furnished to do so, subject to
+    the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+    CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+    TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+    SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+   -------------------------------------------------------------------------- */
+
+#include "colourfit.h"
+#include "colourset.h"
+
+namespace squish {
+
+ColourFit::ColourFit( ColourSet const* colours, int flags )
+  : m_colours( colours ),
+    m_flags( flags )
+{
+}
+
+ColourFit::~ColourFit()
+{
+}
+
+void ColourFit::Compress( void* block )
+{
+    bool isDxt1 = ( ( m_flags & kDxt1 ) != 0 );
+    if( isDxt1 )
+    {
+        Compress3( block );
+        if( !m_colours->IsTransparent() )
+            Compress4( block );
+    }
+    else
+        Compress4( block );
+}
+
+} // namespace squish