FasTC/IO/src/ImageLoaderPVR.cpp

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2013-08-20 19:12:57 +00:00
/* 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;
}