From 093576c9e73a399c27b6160e8da9e64a3ab02583 Mon Sep 17 00:00:00 2001
From: Pavel Krajcevski <pavel@cs.unc.edu>
Date: Fri, 13 Sep 2013 13:10:22 -0400
Subject: [PATCH] Add initial code for our compressor.

---
 PVRTCEncoder/CMakeLists.txt            |  1 +
 PVRTCEncoder/include/PVRTCCompressor.h |  7 +++
 PVRTCEncoder/src/Compressor.cpp        | 76 ++++++++++++++++++++++++++
 3 files changed, 84 insertions(+)
 create mode 100644 PVRTCEncoder/src/Compressor.cpp

diff --git a/PVRTCEncoder/CMakeLists.txt b/PVRTCEncoder/CMakeLists.txt
index a36c3c9..d2c0bc3 100644
--- a/PVRTCEncoder/CMakeLists.txt
+++ b/PVRTCEncoder/CMakeLists.txt
@@ -64,6 +64,7 @@ SET( HEADERS
 )
 
 SET( SOURCES
+  src/Compressor.cpp
   src/Decompressor.cpp
   src/Pixel.cpp
   src/Block.cpp
diff --git a/PVRTCEncoder/include/PVRTCCompressor.h b/PVRTCEncoder/include/PVRTCCompressor.h
index 62ea975..c9001cd 100644
--- a/PVRTCEncoder/include/PVRTCCompressor.h
+++ b/PVRTCEncoder/include/PVRTCCompressor.h
@@ -73,6 +73,13 @@ namespace PVRTCC {
                   const EWrapMode wrapMode = eWrapMode_Wrap,
                   bool bDebugImages = false);
 
+  // Takes a stream of uncompressed RGBA8 data and compresses it into PVRTC
+  // version one. The width and height must be specified in order to properly
+  // decompress the data.
+  void Compress(const DecompressionJob &,
+                bool bTwoBitMode = false,
+                const EWrapMode wrapMode = eWrapMode_Wrap);
+
 }  // namespace PVRTCC
 
 #endif  // PVRTCENCODER_INCLUDE_PVRTCCOMPRESSOR_H_
diff --git a/PVRTCEncoder/src/Compressor.cpp b/PVRTCEncoder/src/Compressor.cpp
new file mode 100644
index 0000000..b17484f
--- /dev/null
+++ b/PVRTCEncoder/src/Compressor.cpp
@@ -0,0 +1,76 @@
+/* FasTC
+ * Copyright (c) 2013 University of North Carolina at Chapel Hill.
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for educational, research, and non-profit purposes, without
+ * fee, and without a written agreement is hereby granted, provided that the
+ * above copyright notice, this paragraph, and the following four paragraphs
+ * appear in all copies.
+ *
+ * Permission to incorporate this software into commercial products may be
+ * obtained by contacting the authors or the Office of Technology Development
+ * at the University of North Carolina at Chapel Hill <otd@unc.edu>.
+ *
+ * This software program and documentation are copyrighted by the University of
+ * North Carolina at Chapel Hill. The software program and documentation are
+ * supplied "as is," without any accompanying services from the University of
+ * North Carolina at Chapel Hill or the authors. The University of North
+ * Carolina at Chapel Hill and the authors do not warrant that the operation of
+ * the program will be uninterrupted or error-free. The end-user understands
+ * that the program was developed for research purposes and is advised not to
+ * rely exclusively on the program for any reason.
+ *
+ * IN NO EVENT SHALL THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL OR THE
+ * AUTHORS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL,
+ * OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF
+ * THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF NORTH CAROLINA
+ * AT CHAPEL HILL OR THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL AND THE AUTHORS SPECIFICALLY
+ * DISCLAIM ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY 
+ * STATUTORY WARRANTY OF NON-INFRINGEMENT. THE SOFTWARE PROVIDED HEREUNDER IS ON
+ * AN "AS IS" BASIS, AND THE UNIVERSITY  OF NORTH CAROLINA AT CHAPEL HILL AND
+ * THE AUTHORS HAVE NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, 
+ * ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Please send all BUG REPORTS to <pavel@cs.unc.edu>.
+ *
+ * The authors may be contacted via:
+ *
+ * Pavel Krajcevski
+ * Dept of Computer Science
+ * 201 S Columbia St
+ * Frederick P. Brooks, Jr. Computer Science Bldg
+ * Chapel Hill, NC 27599-3175
+ * USA
+ * 
+ * <http://gamma.cs.unc.edu/FasTC/>
+ */
+
+#include "PVRTCCompressor.h"
+
+#include "Pixel.h"
+#include "Image.h"
+
+namespace PVRTCC {
+
+  void Compress(const DecompressionJob &dcj,
+                bool bTwoBitMode,
+                const EWrapMode wrapMode) {
+    Image img(dcj.height, dcj.width);
+    for(uint32 j = 0; j < dcj.height; j++) {
+      for(uint32 i = 0; i < dcj.width; i++) {
+        const uint32 *pixels = reinterpret_cast<const uint32 *>(dcj.inBuf);
+        img(i, j).UnpackRGBA(pixels[j * dcj.width + i]);
+      }
+    }
+
+    // Downscale it using anisotropic diffusion based scheme in order to preserve
+    // image features, then reupscale and compute deltas. Use deltas to generate
+    // initial A & B images followed by modulation data.
+  }
+
+}  // namespace PVRTCC