readerwriterdds.cpp

最新osg包

            { "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::NOTICE) << "ReadDDSFile NOTICE : ddsd.dwMipMapCount = "<<ddsd.dwMipMapCount<<std::endl;
        osg::notify(osg::NOTICE) << "ReadDDSFile NOTICE : s = "<<s<<std::endl;
        osg::notify(osg::NOTICE) << "ReadDDSFile NOTICE : t = "<<t<<std::endl;
        osg::notify(osg::NOTICE) << "ReadDDSFile NOTICE : power2_s="<<power2_s<<std::endl;
        osg::notify(osg::NOTICE) << "ReadDDSFile NOTICE : 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::NOTICE) << "ReadDDSFile NOTICE : 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);