Hi Robert,
Two fixes for LUMINANCE and ALPHA_LUMINACE pixel formats written into DDS file.
Component masks were incorrect. I tested results with ultimate DDS
compatibitlity tester ie Microsoft DirectX Texture tool ;-). I have also added
comment with warning about possible problems when writing other than 8 bit
component pixel formats.
Cheers,
Wojtek
/**********************************************************************
*
* FILE: ReaderWriterdds.cpp
*
* DESCRIPTION: Class for reading a DDS file into an osg::Image.
*
* Example on reading a DDS file code can be found at:
* http://developer.nvidia.com/docs/IO/1327/ATT/
* ARB_texture_compression.pdf
* Author: Sebastien Domine, NVIDIA Corporation
*
* CREATED BY: Rune Schmidt Jensen, r...@uni-dk
*
* HISTORY: Created 31.03.2003
* Modified 13.05.2004
* by George Tarantilis, [email protected]
* Modified 22.05.2009
* Wojtek Lewandowski, [email protected]
*
* WARNING:
* Bit Masks in the WrtiteDDS are set for 8 bit components
* write with 4 or 16 bit components will
* probably produce corrupted file
* Wojtek Lewandowski 2009-05-22
*
**********************************************************************/
#include <osg/Texture>
#include <osg/Notify>
#include <osgDB/Registry>
#include <osgDB/FileNameUtils>
#include <osgDB/FileUtils>
#include <osgDB/fstream>
#include <iomanip>
#include <stdio.h>
#include <string.h>
// NOTICE ON WIN32:
// typedef DWORD unsigned long;
// sizeof(DWORD) = 4
typedef unsigned int UI32;
typedef int I32;
struct DDCOLORKEY
{
DDCOLORKEY():
dwColorSpaceLowValue(0),
dwColorSpaceHighValue(0) {}
UI32 dwColorSpaceLowValue;
UI32 dwColorSpaceHighValue;
};
struct DDPIXELFORMAT
{
DDPIXELFORMAT():
dwSize(0),
dwFlags(0),
dwFourCC(0),
dwRGBBitCount(0),
dwRBitMask(0),
dwGBitMask(0),
dwBBitMask(0),
dwRGBAlphaBitMask(0) {}
UI32 dwSize;
UI32 dwFlags;
UI32 dwFourCC;
union
{
UI32 dwRGBBitCount;
UI32 dwYUVBitCount;
UI32 dwZBufferBitDepth;
UI32 dwAlphaBitDepth;
UI32 dwLuminanceBitDepth;
};
union
{
UI32 dwRBitMask;
UI32 dwYBitMask;
};
union
{
UI32 dwGBitMask;
UI32 dwUBitMask;
};
union
{
UI32 dwBBitMask;
UI32 dwVBitMask;
};
union
{
UI32 dwRGBAlphaBitMask;
UI32 dwYUVAlphaBitMask;
UI32 dwRGBZBitMask;
UI32 dwYUVZBitMask;
};
};
struct DDSCAPS2
{
DDSCAPS2():
dwCaps(0),
dwCaps2(0),
dwCaps3(0),
dwCaps4(0) {}
UI32 dwCaps;
UI32 dwCaps2;
UI32 dwCaps3;
union
{
UI32 dwCaps4;
UI32 dwVolumeDepth;
};
};
struct DDSURFACEDESC2
{
DDSURFACEDESC2():
dwSize(0),
dwFlags(0),
dwHeight(0),
dwWidth(0),
lPitch(0),
dwBackBufferCount(0),
dwMipMapCount(0),
dwAlphaBitDepth(0),
dwReserved(0),
lpSurface(0),
dwTextureStage(0) {}
UI32 dwSize;
UI32 dwFlags;
UI32 dwHeight;
UI32 dwWidth;
union
{
I32 lPitch;
UI32 dwLinearSize;
};
union
{
UI32 dwBackBufferCount;
UI32 dwDepth;
};
union
{
UI32 dwMipMapCount;
UI32 dwRefreshRate;
};
UI32 dwAlphaBitDepth;
UI32 dwReserved;
UI32 lpSurface; //Fred Marmond: removed from pointer type to
UI32 for 64bits compatibility. it is unused data
DDCOLORKEY ddckCKDestOverlay;
DDCOLORKEY ddckCKDestBlt;
DDCOLORKEY ddckCKSrcOverlay;
DDCOLORKEY ddckCKSrcBlt;
DDPIXELFORMAT ddpfPixelFormat;
DDSCAPS2 ddsCaps;
UI32 dwTextureStage;
};
//
// Structure of a DXT-1 compressed texture block
// see
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/directx9_c/Opaque_and_1_Bit_Alpha_Textures.asp
//
struct DXT1TexelsBlock
{
unsigned short color_0; // colors at their
unsigned short color_1; // extreme
unsigned int texels4x4; // interpolated colors (2 bits per texel)
};
//
// DDSURFACEDESC2 flags that mark the validity of the struct data
//
#define DDSD_CAPS 0x00000001l // default
#define DDSD_HEIGHT 0x00000002l // default
#define DDSD_WIDTH 0x00000004l // default
#define DDSD_PIXELFORMAT 0x00001000l // default
#define DDSD_PITCH 0x00000008l // For uncompressed formats
#define DDSD_MIPMAPCOUNT 0x00020000l
#define DDSD_LINEARSIZE 0x00080000l // For compressed formats
#define DDSD_DEPTH 0x00800000l // Volume Textures
//
// DDPIXELFORMAT flags
//
#define DDPF_ALPHAPIXELS 0x00000001l
#define DDPF_FOURCC 0x00000004l // Compressed formats
#define DDPF_RGB 0x00000040l // Uncompressed formats
#define DDPF_ALPHA 0x00000002l
#define DDPF_COMPRESSED 0x00000080l
#define DDPF_LUMINANCE 0x00020000l
#define DDPF_BUMPLUMINANCE 0x00040000l // L,U,V
#define DDPF_BUMPDUDV 0x00080000l // U,V
//
// DDSCAPS flags
//
#define DDSCAPS_TEXTURE 0x00001000l // default
#define DDSCAPS_COMPLEX 0x00000008l
#define DDSCAPS_MIPMAP 0x00400000l
#define DDSCAPS2_VOLUME 0x00200000l
#ifndef MAKEFOURCC
#define MAKEFOURCC(ch0, ch1, ch2, ch3) \
((UI32)(char)(ch0) | ((UI32)(char)(ch1) << 8) | \
((UI32)(char)(ch2) << 16) | ((UI32)(char)(ch3) << 24 ))
#endif //defined(MAKEFOURCC)
/*
* FOURCC codes for DX compressed-texture pixel formats
*/
#define FOURCC_DXT1 (MAKEFOURCC('D','X','T','1'))
#define FOURCC_DXT2 (MAKEFOURCC('D','X','T','2'))
#define FOURCC_DXT3 (MAKEFOURCC('D','X','T','3'))
#define FOURCC_DXT4 (MAKEFOURCC('D','X','T','4'))
#define FOURCC_DXT5 (MAKEFOURCC('D','X','T','5'))
osg::Image* ReadDDSFile(std::istream& _istream)
{
DDSURFACEDESC2 ddsd;
char filecode[4];
_istream.read(filecode, 4);
if (strncmp(filecode, "DDS ", 4) != 0) {
return NULL;
}
// Get the surface desc.
_istream.read((char*)(&ddsd), sizeof(ddsd));
// Size of 2d images - 3d images don't set dwLinearSize
//###[afarre_051904]
/*unsigned int size = ddsd.dwMipMapCount > 1 ? ddsd.dwLinearSize *
(ddsd.ddpfPixelFormat.dwFourCC==FOURCC_DXT1 ? 2: 4) : ddsd.dwLinearSize;
if(size <= 0)
{
osg::notify(osg::WARN)<<"Warning:: dwLinearSize is not defined in dds
file, image not loaded."<<std::endl;
return NULL;
}*/
osg::ref_ptr<osg::Image> osgImage = new osg::Image();
//Check valid structure sizes
if(ddsd.dwSize != 124 && ddsd.ddpfPixelFormat.dwSize != 32)
{
return NULL;
}
bool is3dImage = false;
int depth = 1;
// Check for volume image
if( ddsd.dwDepth > 0 && (ddsd.dwFlags & DDSD_DEPTH))
{
is3dImage = true;
depth = ddsd.dwDepth;
}
// Retreive image properties.
int s = ddsd.dwWidth;
int t = ddsd.dwHeight;
int r = depth;
unsigned int dataType = GL_UNSIGNED_BYTE;
unsigned int pixelFormat = 0;
unsigned int internalFormat = 0;
// Handle some esoteric formats
if(ddsd.ddpfPixelFormat.dwFlags & DDPF_BUMPDUDV)
{
osg::notify(osg::WARN) << "ReadDDSFile warning: DDPF_BUMPDUDV format is
not supported" << std::endl;
return NULL;
// ddsd.ddpfPixelFormat.dwFlags =
// DDPF_LUMINANCE + DDPF_ALPHAPIXELS;
// // handle V8U8 as A8L8
// // handle V16U16 as A16L16
// // but Q8W8U8L8 as RGB?
// // A2W10U10V10 as RGBA (dwFlags == DDPF_BUMPDUDV + DDPF_ALPHAPIXELS)
}
if(ddsd.ddpfPixelFormat.dwFlags & DDPF_BUMPLUMINANCE)
{
osg::notify(osg::WARN) << "ReadDDSFile warning: DDPF_BUMPLUMINANCE
format is not supported" << std::endl;
return NULL;
// ddsd.ddpfPixelFormat.dwFlags = DDPF_RGB;
// // handle as RGB
// // L6V5U5 -- 655 is not supported data type in GL
// // X8L8V8U8 -- just as RGB
}
// Uncompressed formats will usually use DDPF_RGB to indicate an RGB format,
// while compressed formats will use DDPF_FOURCC with a four-character code.
bool usingAlpha = ddsd.ddpfPixelFormat.dwFlags & DDPF_ALPHAPIXELS;
bool checkIfUsingOneBitAlpha = false;
// Uncompressed formats.
if(ddsd.ddpfPixelFormat.dwFlags & DDPF_RGB)
{
struct RGBFormat
{
const char* name;
UI32 bitCount;
UI32 rBitMask;
UI32 gBitMask;
UI32 bBitMask;
UI32 aBitMask;
unsigned int internalFormat;
unsigned int pixelFormat;
unsigned int dataType;
};
const unsigned int UNSUPPORTED = 0;
static const RGBFormat rgbFormats[] =
{
{ "R3G3B2" , 8, 0xe0, 0x1c, 0x03, 0x00,
GL_RGB , GL_RGB , GL_UNSIGNED_BYTE_3_3_2 },
{ "R5G6B5" , 16, 0xf800, 0x07e0, 0x001f, 0x0000,
GL_RGB , GL_RGB , GL_UNSIGNED_SHORT_5_6_5 },
{ "A1R5G5B5" , 16, 0x7c00, 0x03e0, 0x001f, 0x8000,
GL_RGBA, GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV },
{ "X1R5G5B5" , 16, 0x7c00, 0x03e0, 0x001f, 0x0000,
GL_RGB , GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV },
{ "A4R4G4B4" , 16, 0x0f00, 0x00f0, 0x000f, 0xf000,
GL_RGBA, GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4_REV },
{ "X4R4G4B4" , 16, 0x0f00, 0x00f0, 0x000f, 0x0000,
GL_RGB , GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4_REV },
{ "A8R3G3B2" , 16, 0x00e0, 0x001c, 0x0003, 0xff00,
GL_RGBA, GL_BGRA, UNSUPPORTED },
{ "R8G8B8", 24, 0xff0000, 0x00ff00, 0x0000ff, 0x000000,
GL_RGB , GL_BGR , GL_UNSIGNED_BYTE },
{ "B8G8R8", 24, 0x0000ff, 0x00ff00, 0xff0000, 0x000000,
GL_RGB , GL_RGB , GL_UNSIGNED_BYTE },
{ "A8R8G8B8", 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000,
GL_RGBA, GL_BGRA, GL_UNSIGNED_BYTE },
{ "X8R8G8B8", 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x00000000,
GL_RGB , GL_BGRA, GL_UNSIGNED_BYTE },
{ "A8B8G8R8", 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000,
GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE },
{ "X8B8G8R8", 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0x00000000,
GL_RGB , GL_RGBA, GL_UNSIGNED_BYTE },
{ "A2R10G10B10", 32, 0x000003ff, 0x000ffc00, 0x3ff00000, 0xc0000000,
GL_RGBA, GL_BGRA, GL_UNSIGNED_INT_2_10_10_10_REV },
{ "A2B10G10R10", 32, 0x3ff00000, 0x000ffc00, 0x000003ff, 0xc0000000,
GL_RGBA, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV },
{ "G16R16", 32, 0x0000ffff, 0xffff0000, 0x00000000, 0x00000000,
GL_RGB, UNSUPPORTED, GL_UNSIGNED_SHORT },
};
bool found = false;
for ( unsigned int i = 0; i < sizeof ( rgbFormats ) / sizeof (
RGBFormat ); i++ )
{
const RGBFormat& f = rgbFormats[ i ];
if ( ddsd.ddpfPixelFormat.dwRGBBitCount == f.bitCount &&
ddsd.ddpfPixelFormat.dwRBitMask == f.rBitMask &&
ddsd.ddpfPixelFormat.dwGBitMask == f.gBitMask &&
ddsd.ddpfPixelFormat.dwBBitMask == f.bBitMask &&
ddsd.ddpfPixelFormat.dwRGBAlphaBitMask == f.aBitMask )
{
if ( f.internalFormat != UNSUPPORTED &&
f.pixelFormat != UNSUPPORTED &&
f.dataType != UNSUPPORTED )
{
osg::notify(osg::INFO) << "ReadDDSFile info : format = " <<
f.name << std::endl;
internalFormat = f.internalFormat;
pixelFormat = f.pixelFormat;
dataType = f.dataType;
found = true;
break;
}
else
{
osg::notify(osg::INFO) << "ReadDDSFile info : " << f.name
<< " format is not supported" <<
std::endl;
return NULL;
}
}
}
if ( !found )
{
osg::notify(osg::WARN) << "ReadDDSFile warning: unhandled RGB pixel
format in dds file, image not loaded" << std::endl;
osg::notify(osg::INFO) << "ReadDDSFile info :
ddsd.ddpfPixelFormat.dwRGBBitCount = "
<< ddsd.ddpfPixelFormat.dwRGBBitCount <<
std::endl;
osg::notify(osg::INFO) << "ReadDDSFile info :
ddsd.ddpfPixelFormat.dwRBitMask = 0x"
<< std::hex << std::setw(8) <<
std::setfill('0')
<< ddsd.ddpfPixelFormat.dwRBitMask <<
std::endl;
osg::notify(osg::INFO) << "ReadDDSFile info :
ddsd.ddpfPixelFormat.dwGBitMask = 0x"
<< std::hex << std::setw(8) <<
std::setfill('0')
<< ddsd.ddpfPixelFormat.dwGBitMask <<
std::endl;
osg::notify(osg::INFO) << "ReadDDSFile info :
ddsd.ddpfPixelFormat.dwBBitMask = 0x"
<< std::hex << std::setw(8) <<
std::setfill('0')
<< ddsd.ddpfPixelFormat.dwBBitMask <<
std::endl;
osg::notify(osg::INFO) << "ReadDDSFile info :
ddsd.ddpfPixelFormat.dwRGBAlphaBitMask = 0x"
<< std::hex << std::setw(8) <<
std::setfill('0')
<< ddsd.ddpfPixelFormat.dwRGBAlphaBitMask <<
std::dec << std::endl;
return NULL;
}
}
else if(ddsd.ddpfPixelFormat.dwFlags & DDPF_LUMINANCE)
{
internalFormat = usingAlpha ? GL_LUMINANCE_ALPHA : GL_LUMINANCE;
pixelFormat = usingAlpha ? GL_LUMINANCE_ALPHA : GL_LUMINANCE;
if ( usingAlpha && ddsd.ddpfPixelFormat.dwLuminanceBitDepth == 8 )
{
osg::notify(osg::INFO) << "ReadDDSFile info : format = L4A4" <<
std::endl;
pixelFormat = GL_LUMINANCE4_ALPHA4; // invalid enumerant?
}
else if ( usingAlpha && ddsd.ddpfPixelFormat.dwLuminanceBitDepth ==
32 )
{
osg::notify(osg::INFO) << "ReadDDSFile info : format = L16A16"
<< std::endl;
dataType = GL_UNSIGNED_SHORT;
}
else if ( !usingAlpha && ddsd.ddpfPixelFormat.dwLuminanceBitDepth
== 16 )
{
osg::notify(osg::INFO) << "ReadDDSFile info : format = L16" <<
std::endl;
dataType = GL_UNSIGNED_SHORT;
}
else if ( usingAlpha )
{
osg::notify(osg::INFO) << "ReadDDSFile info : format = L8A8" <<
std::endl;
}
else
{
osg::notify(osg::INFO) << "ReadDDSFile info : format = L8" <<
std::endl;
}
// else if ( ddsd.ddpfPixelFormat.dwLuminanceBitDepth ==
(usingAlpha ? 64 : 32) )
// {
// dataType = GL_UNSIGNED_INT;
// }
}
else if(ddsd.ddpfPixelFormat.dwFlags & DDPF_ALPHA)
{
osg::notify(osg::INFO) << "ReadDDSFile info : format = ALPHA" <<
std::endl;
internalFormat = GL_ALPHA;
pixelFormat = GL_ALPHA;
}
// Compressed formats
else if(ddsd.ddpfPixelFormat.dwFlags & DDPF_FOURCC)
{
// TODO: Image::isImageTranslucent() doesn't work with S3TC compressed
files
switch(ddsd.ddpfPixelFormat.dwFourCC)
{
case FOURCC_DXT1:
osg::notify(osg::INFO) << "ReadDDSFile info : format = DXT1" <<
std::endl;
if (usingAlpha)
{
internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
pixelFormat = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
}
else
{
internalFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
pixelFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
checkIfUsingOneBitAlpha = true;
}
break;
case FOURCC_DXT3:
osg::notify(osg::INFO) << "ReadDDSFile info : format = DXT3" <<
std::endl;
internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
pixelFormat = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
break;
case FOURCC_DXT5:
osg::notify(osg::INFO) << "ReadDDSFile info : format = DXT5" <<
std::endl;
internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
pixelFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
break;
case 0x00000024: // A16B16G16R16
osg::notify(osg::INFO) << "ReadDDSFile info : format =
A16B16G16R16" << std::endl;
internalFormat = GL_RGBA;
pixelFormat = GL_RGBA;
dataType = GL_UNSIGNED_SHORT;
break;
case 0x00000071: // A16B16G16R16F
osg::notify(osg::INFO) << "ReadDDSFile info : format =
A16B16G16R16F" << std::endl;
internalFormat = GL_RGBA; // why no transparency?
pixelFormat = GL_RGBA;
dataType = GL_HALF_FLOAT_NV;
break;
case 0x0000006E: // Q16W16V16U16
osg::notify(osg::INFO) << "ReadDDSFile info : format =
Q16W16V16U16" << std::endl;
internalFormat = GL_RGBA;
pixelFormat = GL_RGBA;
dataType = GL_UNSIGNED_SHORT;
break;
case 0x00000070: // G16R16F
osg::notify(osg::INFO) << "ReadDDSFile info : G16R16F format is not
supported"
<< std::endl;
return NULL;
// internalFormat = GL_RGB;
// pixelFormat = must be GL_RED and GL_GREEN
// dataType = GL_HALF_FLOAT_NV;
break;
case 0x00000073: // G32R32F
osg::notify(osg::INFO) << "ReadDDSFile info : G32R32F format is not
supported"
<< std::endl;
return NULL;
// internalFormat = GL_RGB;
// pixelFormat = must be GL_RED and GL_GREEN
// dataType = GL_FLOAT;
break;
case 0x00000072: // R32F
osg::notify(osg::INFO) << "ReadDDSFile info : format = R32F" <<
std::endl;
internalFormat = GL_RGB;
pixelFormat = GL_RED;
dataType = GL_FLOAT;
break;
case 0x0000006F: // R16F
osg::notify(osg::INFO) << "ReadDDSFile info : format = R16F" <<
std::endl;
internalFormat = GL_RGB;
pixelFormat = GL_RED;
dataType = GL_HALF_FLOAT_NV;
break;
case 0x00000074: // A32B32G32R32F
osg::notify(osg::INFO) << "ReadDDSFile info : format =
A32B32G32R32F" << std::endl;
internalFormat = GL_RGBA;
pixelFormat = GL_RGBA;
dataType = GL_FLOAT;
break;
case 0x00000075: // CxV8U8
osg::notify(osg::INFO) << "ReadDDSFile info : CxV8U8 format is not
supported" << std::endl;
return NULL;
case MAKEFOURCC( 'U', 'Y', 'V', 'Y' ): // not supported in OSG
case MAKEFOURCC( 'U', 'Y', 'V', '2' ): // not supported in OSG
case MAKEFOURCC( 'R', 'G', 'B', 'G' ): // R8G8_B8G8 -- what is it?
case MAKEFOURCC( 'G', 'R', 'G', 'B' ): // G8R8_G8B8 -- what is it?
//break;
default:
osg::notify(osg::WARN) << "ReadDDSFile warning: unhandled FOURCC
pixel format ("
<< (char)((ddsd.ddpfPixelFormat.dwFourCC &
0x000000ff))
<< (char)((ddsd.ddpfPixelFormat.dwFourCC &
0x0000ff00) >> 8)
<< (char)((ddsd.ddpfPixelFormat.dwFourCC &
0x00ff0000) >> 16)
<< (char)((ddsd.ddpfPixelFormat.dwFourCC &
0xff000000) >> 24)
<< " = 0x" << std::hex << std::setw(8) <<
std::setfill('0')
<< ddsd.ddpfPixelFormat.dwFourCC << std::dec
<< ") in dds file, image not loaded." <<
std::endl;
return NULL;
}
}
else
{
osg::notify(osg::WARN) << "ReadDDSFile warning: unhandled pixel format
(ddsd.ddpfPixelFormat.dwFlags"
<< " = 0x" << std::hex << std::setw(8) <<
std::setfill('0')
<< ddsd.ddpfPixelFormat.dwFlags << std::dec
<< ") in dds file, image not loaded."<<std::endl;
return NULL;
}
//###[afarre_051904]
/*if (is3dImage)
size = osg::Image::computeNumComponents(pixelFormat) * ddsd.dwWidth *
ddsd.dwHeight * depth;
//delayed allocation og image data after all checks
unsigned char* imageData = new unsigned char [size];
if(!imageData)
{
return NULL;
}
// Read image data
_istream.read((char*)imageData, size);
// NOTE: We need to set the image data before setting the mipmap data, this
// is because the setImage method clears the _mipmapdata vector in
osg::Image.
// Set image data and properties.
osgImage->setImage(s,t,r, internalFormat, pixelFormat, dataType, imageData,
osg::Image::USE_NEW_DELETE);
*/
// Now set mipmap data (offsets into image raw data)
//###[afarre_051904]
osg::Image::MipmapDataType mipmaps;
// Take care of mipmaps if any.
if (ddsd.dwMipMapCount>1)
{
// Now set mipmap data (offsets into image raw data).
//###[afarre_051904]osg::Image::MipmapDataType mipmaps;
//This is to complete mipmap sequence until level Nx1
//debugging messages
float power2_s = logf((float)s)/logf((float)2);
float power2_t = logf((float)t)/logf((float)2);
osg::notify(osg::INFO) << "ReadDDSFile INFO : ddsd.dwMipMapCount =
"<<ddsd.dwMipMapCount<<std::endl;
osg::notify(osg::INFO) << "ReadDDSFile INFO : s = "<<s<<std::endl;
osg::notify(osg::INFO) << "ReadDDSFile INFO : t = "<<t<<std::endl;
osg::notify(osg::INFO) << "ReadDDSFile INFO :
power2_s="<<power2_s<<std::endl;
osg::notify(osg::INFO) << "ReadDDSFile INFO :
power2_t="<<power2_t<<std::endl;
mipmaps.resize((unsigned int)osg::maximum(power2_s,power2_t),0);
// Handle S3TC compressed mipmaps.
if( (ddsd.ddpfPixelFormat.dwFlags & DDPF_FOURCC)
&&
(ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT1 ||
ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT3 ||
ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT5))
{
int width = ddsd.dwWidth;
int height = ddsd.dwHeight;
int blockSize = (ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT1) ? 8
: 16;
int offset = 0;
for (unsigned int k = 1; k < ddsd.dwMipMapCount && (width ||
height); ++k)
{
if (width == 0)
width = 1;
if (height == 0)
height = 1;
offset += (((width+3)/4) * ((height+3)/4) * blockSize);
mipmaps[k-1] = offset;
width >>= 1;
height >>= 1;
}
//###[afarre_051904] osgImage->setMipmapData(mipmaps);
}
// Handle uncompressed mipmaps
else
{
int offset = 0;
int width = ddsd.dwWidth;
int height = ddsd.dwHeight;
for (unsigned int k = 1; k < ddsd.dwMipMapCount && (width ||
height); ++k)
{
if (width == 0)
width = 1;
if (height == 0)
height = 1;
offset += height *
osg::Image::computeRowWidthInBytes( width, pixelFormat,
dataType, 1 );
mipmaps[k-1] = offset;
width >>= 1;
height >>= 1;
}
//###[afarre_051904] osgImage->setMipmapData(mipmaps);
}
}
osgImage->setImage(s,t,r, internalFormat, pixelFormat, dataType, 0,
osg::Image::USE_NEW_DELETE);
if (mipmaps.size()>0) osgImage->setMipmapLevels(mipmaps);
unsigned int size = osgImage->getTotalSizeInBytesIncludingMipmaps();
osg::notify(osg::INFO) << "ReadDDSFile INFO : size = " << size << std::endl;
if(size <= 0)
{
osg::notify(osg::WARN) << "ReadDDSFile warning: size <= 0" << std::endl;
return NULL;
}
unsigned char* imageData = new unsigned char [size];
if(!imageData)
{
osg::notify(osg::WARN) << "ReadDDSFile warning: imageData == NULL" <<
std::endl;
return NULL;
}
// Read image data
_istream.read((char*)imageData, size);
// Check if alpha information embedded in the 8-byte encoding blocks
if (checkIfUsingOneBitAlpha)
{
const DXT1TexelsBlock *texelsBlock = reinterpret_cast<const
DXT1TexelsBlock*>(imageData);
// Only do the check on the first mipmap level
unsigned int numBlocks = mipmaps.size()>0 ? mipmaps[0] / 8 : size / 8;
for (int i=numBlocks; i>0; --i, ++texelsBlock)
{
if (texelsBlock->color_0<=texelsBlock->color_1)
{
// Texture is using the 1-bit alpha encoding, so we need to
update the assumed pixel format
internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
pixelFormat = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
break;
}
}
}
osgImage->setImage(s,t,r, internalFormat, pixelFormat, dataType, imageData,
osg::Image::USE_NEW_DELETE);
if (mipmaps.size()>0) osgImage->setMipmapLevels(mipmaps);
// Return Image.
return osgImage.release();
}
/*
osg::Image::MipmapDataType mipmaps;
osgImage->setMipmapData(mipmaps);
osgImage->setImage(s,t,r, internalFormat, pixelFormat, dataType, 0,
osg::Image::USE_NEW_DELETE);
printf("INVENTO===> gtsibim:%d grsib:%d mi_size:%d lPitch%d\n",
osgImage->getTotalSizeInBytesIncludingMipmaps(),
osgImage->getRowSizeInBytes(), size, ddsd.lPitch);
printf("CORRECTO**> gtsibim:%d grsib:%d mi_size:%d lPitch%d\n",
osgImage->getTotalSizeInBytesIncludingMipmaps(),
osgImage->getRowSizeInBytes(), size, ddsd.lPitch);
*/
bool WriteDDSFile(const osg::Image *img, std::ostream& fout)
{
// Initialize ddsd structure and its members
DDSURFACEDESC2 ddsd;
DDPIXELFORMAT ddpf;
//DDCOLORKEY ddckCKDestOverlay;
//DDCOLORKEY ddckCKDestBlt;
//DDCOLORKEY ddckCKSrcOverlay;
//DDCOLORKEY ddckCKSrcBlt;
DDSCAPS2 ddsCaps;
ddsd.dwSize = sizeof(ddsd);
ddpf.dwSize = sizeof(ddpf);
// Default values and initialization of structures' flags
unsigned int SD_flags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH |
DDSD_PIXELFORMAT;
unsigned int CAPS_flags = DDSCAPS_TEXTURE;
unsigned int PF_flags = 0;
unsigned int CAPS2_flags = 0;
// Get image properties
unsigned int dataType = img->getDataType();
unsigned int pixelFormat = img->getPixelFormat();
//unsigned int internalFormat = img->getInternalTextureFormat();
//unsigned int components =
osg::Image::computeNumComponents(pixelFormat);
unsigned int pixelSize =
osg::Image::computePixelSizeInBits(pixelFormat, dataType);
unsigned int imageSize = img->getImageSizeInBytes();
bool is3dImage = false;
ddsd.dwWidth = img->s();
ddsd.dwHeight = img->t();
int r = img->r();
if(r > 1) /* check for 3d image */
{
is3dImage = true;
ddsd.dwDepth = r;
SD_flags |= DDSD_DEPTH;
CAPS_flags |= DDSCAPS_COMPLEX;
CAPS2_flags |= DDSCAPS2_VOLUME;
}
// Determine format - set flags and ddsd, ddpf properties
switch (pixelFormat)
{
//Uncompressed
case GL_RGBA:
{
ddpf.dwRBitMask = 0x000000ff;
ddpf.dwGBitMask = 0x0000ff00;
ddpf.dwBBitMask = 0x00ff0000;
ddpf.dwRGBAlphaBitMask = 0xff000000;
PF_flags |= (DDPF_ALPHAPIXELS | DDPF_RGB);
ddpf.dwRGBBitCount = pixelSize;
ddsd.lPitch = img->getRowSizeInBytes();
SD_flags |= DDSD_PITCH;
}
break;
case GL_BGRA:
{
ddpf.dwBBitMask = 0x000000ff;
ddpf.dwGBitMask = 0x0000ff00;
ddpf.dwRBitMask = 0x00ff0000;
ddpf.dwRGBAlphaBitMask = 0xff000000;
PF_flags |= (DDPF_ALPHAPIXELS | DDPF_RGB);
ddpf.dwRGBBitCount = pixelSize;
ddsd.lPitch = img->getRowSizeInBytes();
SD_flags |= DDSD_PITCH;
}
break;
case GL_LUMINANCE_ALPHA:
{
ddpf.dwRBitMask = 0x000000ff;
ddpf.dwRGBAlphaBitMask = 0x0000ff00;
PF_flags |= (DDPF_ALPHAPIXELS | DDPF_LUMINANCE);
ddpf.dwRGBBitCount = pixelSize;
ddsd.lPitch = img->getRowSizeInBytes();
SD_flags |= DDSD_PITCH;
}
break;
case GL_RGB:
{
ddpf.dwRBitMask = 0x000000ff;
ddpf.dwGBitMask = 0x0000ff00;
ddpf.dwBBitMask = 0x00ff0000;
PF_flags |= DDPF_RGB;
ddpf.dwRGBBitCount = pixelSize;
ddsd.lPitch = img->getRowSizeInBytes();
SD_flags |= DDSD_PITCH;
}
break;
case GL_LUMINANCE:
{
ddpf.dwRBitMask = 0x000000ff;
PF_flags |= DDPF_LUMINANCE;
ddpf.dwRGBBitCount = pixelSize;
ddsd.lPitch = img->getRowSizeInBytes();
SD_flags |= DDSD_PITCH;
}
break;
case GL_ALPHA:
{
ddpf.dwRGBAlphaBitMask = 0x000000ff;
PF_flags |= DDPF_ALPHA;
ddpf.dwRGBBitCount = pixelSize;
ddsd.lPitch = img->getRowSizeInBytes();
SD_flags |= DDSD_PITCH;
}
break;
//Compressed
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
{
ddpf.dwFourCC = FOURCC_DXT1;
PF_flags |= (DDPF_ALPHAPIXELS | DDPF_FOURCC);
ddsd.dwLinearSize = imageSize;
SD_flags |= DDSD_LINEARSIZE;
}
break;
case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
{
ddpf.dwFourCC = FOURCC_DXT3;
PF_flags |= (DDPF_ALPHAPIXELS | DDPF_FOURCC);
ddsd.dwLinearSize = imageSize;
SD_flags |= DDSD_LINEARSIZE;
}
break;
case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
{
ddpf.dwFourCC = FOURCC_DXT5;
PF_flags |= (DDPF_ALPHAPIXELS | DDPF_FOURCC);
ddsd.dwLinearSize = imageSize;
SD_flags |= DDSD_LINEARSIZE;
}
break;
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
{
ddpf.dwFourCC = FOURCC_DXT1;
PF_flags |= DDPF_FOURCC; /* No alpha here */
ddsd.dwLinearSize = imageSize;
SD_flags |= DDSD_LINEARSIZE;
}
break;
default:
osg::notify(osg::WARN)<<"Warning:: unhandled pixel format in image,
file cannot be written."<<std::endl;
return false;
}
// set even more flags
if(img->isMipmap() && !is3dImage)
{
SD_flags |= DDSD_MIPMAPCOUNT;
CAPS_flags |= DDSCAPS_COMPLEX | DDSCAPS_MIPMAP;
ddsd.dwMipMapCount = img->getNumMipmapLevels();
osg::notify(osg::INFO)<<"writing out with mipmaps
ddsd.dwMipMapCount"<<ddsd.dwMipMapCount<<std::endl;
}
else
{
osg::notify(osg::INFO)<<"no mipmaps to write out."<<std::endl;
}
// Assign flags and structure members of ddsd
ddsd.dwFlags = SD_flags;
ddpf.dwFlags = PF_flags;
ddsCaps.dwCaps = CAPS_flags;
ddsCaps.dwCaps2 = CAPS2_flags;
ddsd.ddpfPixelFormat = ddpf;
ddsd.ddsCaps = ddsCaps;
// Write DDS file
fout.write("DDS ", 4); /* write FOURCC */
fout.write(reinterpret_cast<char*>(&ddsd), sizeof(ddsd)); /* write file
header */
// int isize = img->getTotalSizeInBytesIncludingMipmaps();
if(!is3dImage)
{
fout.write(reinterpret_cast<const char*>(img->data()),
img->getTotalSizeInBytesIncludingMipmaps());
}
else /* 3d image */
{
for(int i = 0; i < r; ++i)
{
fout.write(reinterpret_cast<const char*>(img->data(0, 0, i)),
imageSize);
}
}
// Check for correct saving
if (fout.fail())
{
return false;
}
// If we get that far the file was saved properly //
return true;
}
class ReaderWriterDDS : public osgDB::ReaderWriter
{
public:
ReaderWriterDDS()
{
supportsExtension("dds","DDS image format");
}
virtual const char* className() const
{
return "DDS Image Reader/Writer";
}
virtual ReadResult readObject(const std::string& file, const
osgDB::ReaderWriter::Options* options) const
{
return readImage(file,options);
}
virtual ReadResult readObject(std::istream& fin, const Options* options)
const
{
return readImage(fin,options);
}
virtual ReadResult readImage(const std::string& file, const
osgDB::ReaderWriter::Options* options) const
{
std::string ext = osgDB::getLowerCaseFileExtension(file);
if (!acceptsExtension(ext)) return ReadResult::FILE_NOT_HANDLED;
std::string fileName = osgDB::findDataFile( file, options );
if (fileName.empty()) return ReadResult::FILE_NOT_FOUND;
osgDB::ifstream stream(fileName.c_str(), std::ios::in |
std::ios::binary);
if(!stream) return ReadResult::FILE_NOT_HANDLED;
ReadResult rr = readImage(stream, options);
if(rr.validImage()) rr.getImage()->setFileName(file);
return rr;
}
virtual ReadResult readImage(std::istream& fin, const Options* options)
const
{
osg::Image* osgImage = ReadDDSFile(fin);
if (osgImage==NULL) return ReadResult::FILE_NOT_HANDLED;
if (options &&
options->getOptionString().find("dds_flip")!=std::string::npos)
{
osgImage->flipVertical();
}
return osgImage;
}
virtual WriteResult writeObject(const osg::Object& object,const
std::string& file, const osgDB::ReaderWriter::Options* options) const
{
const osg::Image* image = dynamic_cast<const osg::Image*>(&object);
if (!image) return WriteResult::FILE_NOT_HANDLED;
return writeImage(*image,file,options);
}
virtual WriteResult writeObject(const osg::Object& object,std::ostream&
fout,const Options* options) const
{
const osg::Image* image = dynamic_cast<const osg::Image*>(&object);
if (!image) return WriteResult::FILE_NOT_HANDLED;
return writeImage(*image,fout,options);
}
virtual WriteResult writeImage(const osg::Image &image,const std::string&
file, const osgDB::ReaderWriter::Options* options) const
{
std::string ext = osgDB::getFileExtension(file);
if (!acceptsExtension(ext)) return WriteResult::FILE_NOT_HANDLED;
osgDB::ofstream fout(file.c_str(), std::ios::out | std::ios::binary);
if(!fout) return WriteResult::ERROR_IN_WRITING_FILE;
return writeImage(image,fout,options);
}
virtual WriteResult writeImage(const osg::Image& image,std::ostream&
fout,const Options*) const
{
bool success = WriteDDSFile(&image, fout);
if(success)
return WriteResult::FILE_SAVED;
else
return WriteResult::ERROR_IN_WRITING_FILE;
}
};
// now register with Registry to instantiate the above
// reader/writer.
REGISTER_OSGPLUGIN(dds, ReaderWriterDDS)
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