Skeleton for reading .pvr files

IO/CMakeLists.txt

@@ -44,6 +44,7 @@ SET( SOURCES
 	"src/ImageWriter.cpp"
 	"src/ImageLoader.cpp"
 	"src/ImageFile.cpp"
+    "src/ImageLoaderPVR.cpp"
 )
 
 SET( HEADERS
@@ -51,6 +52,7 @@ SET( HEADERS
 	"config/ImageLoader.h.in"
 	"include/ImageFile.h"
 	"include/FileStream.h"
+    "src/ImageLoaderPVR.h"
 )
 
 IF( WIN32 )

IO/src/ImageLoaderPVR.cpp

@@ -0,0 +1,215 @@
+/* FasTC
+ * Copyright (c) 2012 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 "ImageLoaderPVR.h"
+
+#include <stdio.h>
+#include <assert.h>
+#include <algorithm>
+
+#include "TexCompTypes.h"
+
+static void ReportError(const char *msg) {
+  fprintf(stderr, "ERROR: ImageLoaderPVR -- %s\n", msg);
+}
+
+ImageLoaderPVR::ImageLoaderPVR(const unsigned char *rawData) 
+  : ImageLoader(rawData)
+{
+}
+
+ImageLoaderPVR::~ImageLoaderPVR() {
+}
+
+bool ImageLoaderPVR::ReadData() {
+  const uint8 *d = m_RawData;
+  if((d[0] == 'P' && d[1] == 'V' && d[2] == 'R' && d[3] == '\03') ||
+     (d[0] == '\03' && d[1] == 'R' && d[2] == 'V' && d[3] == 'P')) {
+    return ReadPVR3();
+  }
+  else {
+    ReportError("Unsupported PVR version");
+    return false;
+  }
+}
+
+bool ImageLoaderPVR::ReadPVR1() {
+  return false;
+}
+
+bool ImageLoaderPVR::ReadPVR2() {
+  return false;
+}
+
+struct PVR3TexHeader {
+ private:
+  uint32 m_Version;
+  uint32 m_Flags;
+  uint64 m_PixelFormat;
+  uint32 m_ColorSpace;
+  uint32 m_ChannelType;
+  uint32 m_Height;
+  uint32 m_Width;
+  uint32 m_Depth;
+  uint32 m_NumSurfaces;
+  uint32 m_NumFaces;
+  uint32 m_MipMapCount;
+  uint32 m_MetadataSize;
+
+  static void FlipBytes(uint8 *bytes, int nBytes) {
+    for (int i = 0; i < (nBytes >> 1); i++) {
+      std::swap(bytes[i], bytes[nBytes - i - 1]);
+    }
+  }
+
+  static uint32 FlipInt32(uint32 in) {
+    uint8 *inPtr = (uint8 *)(&in);
+    FlipBytes(inPtr, 4);
+    return in;
+  }
+
+  static uint64 FlipInt64(uint64 in) {
+    uint8 *inPtr = (uint8 *)(&in);
+    FlipBytes(inPtr, 8);
+    return in;
+  }
+
+  bool ShouldFlip() const {
+    const uint8 *versionPtr = (const uint8 *)(&m_Version);
+    if(versionPtr[0] == 'P' &&
+       versionPtr[1] == 'V' &&
+       versionPtr[2] == 'R' &&
+       versionPtr[3] == '\03') {
+      return false;
+    }
+    return true;
+  }
+
+ public:
+
+#define CONSTRUCT_GETTER(name) \
+  uint32 Get##name () const {  \
+    return ShouldFlip()? FlipInt32(m_##name) : m_##name; \
+  }
+
+  CONSTRUCT_GETTER(Flags)
+  CONSTRUCT_GETTER(ColorSpace)
+  CONSTRUCT_GETTER(ChannelType)
+  CONSTRUCT_GETTER(Height)
+  CONSTRUCT_GETTER(Width)
+  CONSTRUCT_GETTER(Depth)
+  CONSTRUCT_GETTER(NumSurfaces)
+  CONSTRUCT_GETTER(NumFaces)
+  CONSTRUCT_GETTER(MipMapCount)
+  CONSTRUCT_GETTER(MetadataSize)
+
+#undef CONSTRUCT_GETTER
+
+  uint64 GetPixelFormat() const {
+    return ShouldFlip()? FlipInt64(m_PixelFormat) : m_PixelFormat;
+  }
+
+  enum EFlag {
+    eFlag_Premultiplied = 0x02
+  };
+
+  enum EPixelFormat {
+    ePixelFormat_PVRTC_2BPP_RGB = 0,
+    ePixelFormat_PVRTC_2BPP_RGBA = 1,
+    ePixelFormat_PVRTC_4BPP_RGB = 2,
+    ePixelFormat_PVRTC_4BPP_RGBA = 3,
+    ePixelFormat_PVRTC2_2BPP = 4,
+    ePixelFormat_PVRTC2_4BPP = 5,
+    ePixelFormat_ETC1 = 6,
+    ePixelFormat_DXT1 = 7,
+    ePixelFormat_DXT2 = 8,
+    ePixelFormat_DXT3 = 9,
+    ePixelFormat_DXT4 = 10,
+    ePixelFormat_DXT5 = 11,
+    ePixelFormat_BC1 = ePixelFormat_DXT1,
+    ePixelFormat_BC2 = ePixelFormat_DXT3,
+    ePixelFormat_BC3 = ePixelFormat_DXT5,
+    ePixelFormat_BC4 = 12,
+    ePixelFormat_BC5 = 13,
+    ePixelFormat_BC6 = 14,
+    ePixelFormat_BC7 = 15,
+    ePixelFormat_UYVY = 16,
+    ePixelFormat_YUY2 = 17,
+    ePixelFormat_BW1BPP = 18,
+    ePixelFormat_R9G9B9E5_SE = 19,
+    ePixelFormat_RGBG8888 = 20,
+    ePixelFormat_GRGB8888 = 21,
+    ePixelFormat_ETC2_RGB = 22,
+    ePixelFormat_ETC2_RGBA = 23,
+    ePixelFormat_ETC2_RGB_A1 = 24,
+    ePixelFormat_EAC_R11_UNSIGNED = 25,
+    ePixelFormat_EAC_R11_SIGNED = 26,
+    ePixelFormat_EAC_RG11_UNSIGNED = 27,
+    ePixelFormat_EAC_RG11_SIGNED = 28
+  };
+
+  enum EColorSpace {
+    eColorSpace_Linear,
+    eColorSpace_sRGB
+  };
+
+  enum EChannelType {
+    eChannelType_UnsignedByteNormalized = 0,
+    eChannelType_SignedByteNormalized,
+    eChannelType_UnsignedByte,
+    eChannelType_SignedByte,
+    eChannelType_UnsignedShortNormalized,
+    eChannelType_SignedShortNormalized,
+    eChannelType_UnsignedShort,
+    eChannelType_SignedShort,
+    eChannelType_UnsignedIntegerNormalized,
+    eChannelType_SignedIntegerNormalized,
+    eChannelType_UnsignedInteger,
+    eChannelType_SignedInteger,
+    eChannelType_Float,
+  };
+};
+
+bool ImageLoaderPVR::ReadPVR3() {
+  return false;
+}

IO/src/ImageLoaderPVR.h

@@ -0,0 +1,61 @@
+/* FasTC
+ * Copyright (c) 2012 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/>
+ */
+
+#ifndef _IMAGE_LOADER_PVR_H_
+#define _IMAGE_LOADER_PVR_H_
+
+#include "ImageLoader.h"
+
+class ImageLoaderPVR : public ImageLoader {
+ public:
+  ImageLoaderPVR(const unsigned char *rawData);
+  virtual ~ImageLoaderPVR();
+
+  virtual bool ReadData();
+ private:
+  virtual bool ReadPVR1();
+  virtual bool ReadPVR2();
+  virtual bool ReadPVR3();
+};
+
+#endif // _IMAGE_LOADER_PVR_H_