Thanks Ulrich, I eventually got it going, posting for reference:
Size I allocated was the issue.
Regards
Reading:
=======
unsigned char* data = new unsigned char[texSize*texSize*texSize*4];
std::ifstream fin(filename.c_str(),std::ios::in | std::ios::binary);
fin.read((char*)data ,(texSize*texSize*texSize*4));
fin.close();
osg::ref_ptr<osg::Image> image = new osg::Image;
image->setImage(texSize, texSize, texSize,4, GL_RGBA,
L_UNSIGNED_BYTE,data,osg::Image::USE_NEW_DELETE);
Writing:
=====
std::ofstream fout
("data/textures/image3d/imagedata3d_128",std::ios::app | std::ios::out |
std::ios::binary);
unsigned int size = image->getTotalSizeInBytesIncludingMipmaps();
fout.write( (char*)image->data(), size );
// Check
if ( fout.fail() )
std::cout<<"Failed to write image->data"<<std::endl;
fout.close();
On 06/24/2010 12:21 PM, Ulrich Hertlein wrote:
> Hi Paul,
>
> On 23/06/10 11:53 , Paul Pocock wrote:
>
>> I'm trying to write 3d texture data to file but when loading back into
>> osg::Image I'm getting rubbish:
>>
>> Writing to file with 3d texture data:
>>
>> unsigned int size = image->getTotalSizeInBytesIncludingMipmaps();
>> fout.write( (char*)image->data(), size );
>>
>>
>> Reading from file:
>>
>> unsigned char* data = new unsigned char[texSize*texSize*texSize*4];
>> std::ifstream fin("image3ddata2",std::ios::binary);
>>
>> fin.read((char*)&data ,(sizeof(unsigned char)* 4 * texSize * texSize *
>> texSize));
>>
>> osg::ref_ptr<osg::Image> image = new osg::Image;
>> image->setImage(texSize,texSize,texSize,4, GL_RGBA,
>> GL_UNSIGNED_BYTE,data, osg::Image::USE_NEW_DELETE);
>>
>>
>> Can anyone see anything I'm doing wrong? Either Writing or Reading?
>>
> I cannot spot anything obviously wrong with the code.
> Can you check if the file on disk is okay, so that either part (writing or
> reading) can be
> ruled out?
>
> I'd also try to set the memory to some pattern before reading, in case the
> file isn't
> fully read or something.
>
> Cheers,
> /ulrich
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