Hi Frédéric,
The most likely cause of problem is your app picking up on an old OSG
plugin which is hanging around since the previous install. Try moving
old OSG libs out of the your runtime path.
Robert.
On 7/24/06, Drolet, Frederic (LTI) <[EMAIL PROTECTED]> wrote:
Hello everyone,
I've recently updated my system to OSG 1.1 and I encountered a new problem
with textures. I'm trying to include a simple 3DS model in the scene with a
JPG texture image on the surface. On runtime, the application crashes in the
function Texture::applyTexImage2D_load() in the file Texture.cpp. More
precisely, the access violation occurs in this part of the code while
calling glTexImage2D() :
if( _min_filter == LINEAR || _min_filter == NEAREST ||
useHardwareMipMapGeneration)
{
bool hardwareMipMapOn = false;
if (_min_filter != LINEAR && _min_filter != NEAREST)
{
if (useHardwareMipMapGeneration) glTexParameteri(GL_TEXTURE_2D,
GL_GENERATE_MIPMAP_SGIS,GL_TRUE);
hardwareMipMapOn = true;
}
if ( !compressed_image)
{
numMipmapLevels = 1;
glTexImage2D( target, 0, _internalFormat, ß MEMORY ACCESS
VIOLATION OCCURS HERE
inwidth, inheight, _borderWidth,
(GLenum)image->getPixelFormat(),
(GLenum)image->getDataType(),
data -dataMinusOffset+dataPlusOffset);
}
else if
(extensions->isCompressedTexImage2DSupported())
{
numMipmapLevels = 1;
GLint blockSize, size;
getCompressedSize(_internalFormat, inwidth,
inheight, 1, blockSize,size);
extensions->glCompressedTexImage2D(target, 0,
_internalFormat,
inwidth, inheight,0,
size,
data-dataMinusOffset+dataPlusOffset);
}
if (hardwareMipMapOn) glTexParameteri(GL_TEXTURE_2D,
GL_GENERATE_MIPMAP_SGIS,GL_FALSE);
}
,,,
The image and data pointers seem to be ok (they're pointing to something and
_pixelFormat and _dataType contain values 6407 and 5121 respectively in
image pointer)… However, I suspect a problem with dataMinusOffset and
dataPlusOffset. Both of them are NULL because they are never set. The image
pointer has no PixelBufferObject and both dataMinusOffset and dataPlusOffset
remains unset in this part of the code :
unsigned char* dataMinusOffset = 0;
unsigned char* dataPlusOffset = 0;
const PixelBufferObject* pbo = image->getPixelBufferObject();
if (pbo && pbo->isBufferObjectSupported(contextID) &&
!needImageRescale)
{
pbo->compileBuffer(state);
pbo->bindBuffer(contextID);
dataMinusOffset = data;
dataPlusOffset = reinterpret_cast<unsigned char*>(pbo->offset());
#ifdef DO_TIMING
osg::notify(osg::NOTICE)<<"after PBO
"<<osg::Timer::instance()->delta_m(start_tick,osg::Timer::instance()->tick())<<"ms"<<std::endl;
#endif
}
else
{
pbo = 0;
}
Maybe there is something more to do with the new version when loading a 3DS
model with JPG texture but I don't have a clue… I didn't try with another
image format but I think it will do the same thing. Anybody can help me ? Is
that a bug ?
Thanks !
Frédéric Drolet
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