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Add KTX loaders

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This commit is contained in:
Pavel Krajcevski 2014-01-23 14:43:05 -05:00
parent d0ff861551
commit 95e86cbf0d
3 changed files with 353 additions and 0 deletions
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4
IO/CMakeLists.txt
View file

@ -87,6 +87,10 @@ INCLUDE_DIRECTORIES( ${FasTC_SOURCE_DIR}/IO/third_party/tga )
SET( SOURCES ${SOURCES} "src/ImageLoaderTGA.cpp" )
SET( HEADERS ${HEADERS} "src/ImageLoaderTGA.h" )
# Add KTX loaders
SET( SOURCES ${SOURCES} "src/ImageLoaderKTX.cpp" )
SET( HEADERS ${HEADERS} "src/ImageLoaderKTX.h" )
FIND_PACKAGE( OpenGL )
IF(OPENGL_FOUND)
INCLUDE_DIRECTORIES( ${OPENGL_INCLUDE_DIRS} )

274
IO/src/ImageLoaderKTX.cpp Normal file
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@ -0,0 +1,274 @@
/* FasTC
* Copyright (c) 2014 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 "ImageLoaderKTX.h"
#include <algorithm>
#include <cassert>
#include <cstdio>
#include <cstring>
#include <iostream>
#include "TexCompTypes.h"
#include "ScopedAllocator.h"
#include "GLDefines.h"
class ByteReader {
private:
const uint8 *m_Data;
uint32 m_BytesLeft;
public:
ByteReader(const uint8 *data, uint32 bytesExpected)
: m_Data(data), m_BytesLeft(bytesExpected)
{ }
bool Advance(uint32 nBytes) {
if(nBytes < m_BytesLeft) {
assert(!"Cannot read any more, unexpected bytes!");
return false;
}
m_Data += nBytes;
m_BytesLeft -= nBytes;
return true;
}
operator const uint8 *() {
return m_Data;
}
const uint8 *GetData() const { return m_Data; }
uint32 GetBytesLeft() const { return m_BytesLeft; }
};
class IntLoader {
public:
virtual uint32 ReadInt(const uint8 *data) const = 0;
bool LoadInt(ByteReader &data, uint32 &result) const {
result = ReadInt(data);
data.Advance(4);
return true;
}
};
class BigEndianIntLoader : public IntLoader {
public:
virtual uint32 ReadInt(const uint8 *data) const {
uint32 ret = 0;
ret |= data[0];
for(uint32 i = 1; i < 4; i++) {
ret <<= 8;
ret |= data[i];
}
return ret;
}
};
static const BigEndianIntLoader gBEldr;
class LittleEndianIntLoader : public IntLoader {
public:
virtual uint32 ReadInt(const uint8 *data) const {
uint32 ret = 0;
ret |= data[3];
for(uint32 i = 3; i >= 0; i--) {
ret <<= 8;
ret |= data[i];
}
return ret;
}
};
static const LittleEndianIntLoader gLEldr;
ImageLoaderKTX::ImageLoaderKTX(const uint8 *rawData, const int32 rawDataSz)
: ImageLoader(rawData, rawDataSz), m_Processor(NULL)
{ }
ImageLoaderKTX::~ImageLoaderKTX() { }
bool ImageLoaderKTX::ReadData() {
ByteReader rdr (m_RawData, m_NumRawDataBytes);
// First, check to make sure that the identifier is present...
static const uint8 kKTXID[12] = {
0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A
};
if(memcmp(rdr.GetData(), kKTXID, 12) == 0) {
rdr.Advance(12);
} else {
return false;
}
const IntLoader *ldr = NULL;
if(rdr.GetData()[0] == 0x04) {
ldr = &gBEldr;
} else {
ldr = &gLEldr;
}
rdr.Advance(4);
#define LOAD(x) uint32 x; do { if(!ldr->LoadInt(rdr, x)) { return false; } } while(0)
LOAD(glType);
LOAD(glTypeSize);
LOAD(glFormat);
LOAD(glInternalFormat);
LOAD(glBaseInternalFormat);
LOAD(pixelWidth);
LOAD(pixelHeight);
LOAD(pixelDepth);
LOAD(numberOfArrayElements);
LOAD(numberOfFaces);
LOAD(numberOfMipmapLevels);
LOAD(bytesOfKeyValueData);
// Do we need to read the data?
if(m_Processor) {
const uint8 *imgData = rdr.GetData() + bytesOfKeyValueData;
while(rdr.GetData() < imgData) {
LOAD(keyAndValueByteSize);
FasTC::ScopedAllocator<uint8> keyValueData =
FasTC::ScopedAllocator<uint8>::Create(keyAndValueByteSize);
if(!keyValueData) {
fprintf(stderr, "KTX loader - out of memory.\n");
return false;
}
// Read the bytes...
memcpy(keyValueData, rdr.GetData(), keyAndValueByteSize);
const char *key = reinterpret_cast<const char *>((const uint8 *)keyValueData);
const char *value = key;
while(value != '\0') {
value++;
}
value++; // consume the null byte
m_Processor(key, value);
rdr.Advance((keyAndValueByteSize + 3) & ~0x3);
}
} else {
rdr.Advance(bytesOfKeyValueData);
}
// The following code only supports a limited subset of
// image types, the full spec (if we choose to support it)
// is here:
// http://www.khronos.org/opengles/sdk/tools/KTX/file_format_spec
// Read image data...
if(numberOfMipmapLevels != 1) {
fprintf(stderr, "KTX loader - unsupported mipmap levels: %d\n", numberOfMipmapLevels);
return false;
}
LOAD(imageSize);
if(numberOfArrayElements > 1) {
fprintf(stderr,
"KTX loader - unsupported number of array elements: %d\n",
numberOfArrayElements);
return false;
}
if(numberOfFaces != 1) {
fprintf(stderr,
"KTX loader - unsupported number of faces: %d\n"
"This likely means that we are trying to load a cube map.\n",
numberOfFaces);
return false;
}
if(pixelDepth != 0) {
fprintf(stderr, "KTX loader - 3D textures not supported\n");
return false;
}
if(pixelHeight == 0) {
fprintf(stderr, "KTX loader - 1D textures not supported\n");
return false;
}
if(pixelWidth == 0) {
fprintf(stderr, "KTX loader - nonzero pixel width??\n");
return false;
}
if(glType == 0 &&
glFormat == 0 &&
glInternalFormat == GL_COMPRESSED_RGBA_BPTC_UNORM) {
fprintf(stderr, "KTX loader - BPTC compressed textures unsupported!\n");
return false;
// Load compressed texture...
// rdr.Advance(pixelWidth * pixelHeight);
} else {
if(glType != GL_BYTE) {
fprintf(stderr, "KTX loader - unsupported OpenGL type: 0x%x\n", glType);
return false;
}
if(glInternalFormat != GL_RGBA8) {
fprintf(stderr, "KTX loader - unsupported internal format: 0x%x\n", glFormat);
return false;
}
// We should have RGBA8 data here so we can simply load it
// as we normally would.
m_Width = pixelWidth;
m_Height = pixelHeight;
LoadFromPixelBuffer(reinterpret_cast<const uint32 *>(rdr.GetData()));
rdr.Advance(pixelWidth * pixelHeight * 4);
}
return rdr.GetBytesLeft() == 0;
}

75
IO/src/ImageLoaderKTX.h Normal file
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@ -0,0 +1,75 @@
/* FasTC
* Copyright (c) 2014 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 _IO_SRC_IMAGE_LOADER_KTX_H_
#define _IO_SRC_IMAGE_LOADER_KTX_H_
#include "ImageLoader.h"
class ImageLoaderKTX : public ImageLoader {
public:
typedef void (*KTXKeyValueProcessor)(const char *key, const char *value);
ImageLoaderKTX(const uint8 *rawData, const int32 rawDataSz);
virtual ~ImageLoaderKTX();
virtual bool ReadData();
void SetProcessor(KTXKeyValueProcessor proc) {
m_Processor = proc;
}
private:
KTXKeyValueProcessor m_Processor;
};
#endif // _IO_SRC_IMAGE_LOADER_KTX_H_