CEGUI (Crazy Eddie's GUI) Forums

I just upgraded CEGUI and OGRE to the newest versions,
I am running the GUI example in the OGRE Samples Directory,
my text is not displaying correctly in the CEGUI Widgets.
It has a yellow backgroud.

Are you sure your app is linked with the right library? After compiling CEGUI, you have to check that your ogre project accesses the new files before compiling it again.

It could also be a font problem (if you use a static font with no alpha in your image file for example). Did you modified something related with that?

--
Chris

This is an endian issue. I'm not sure where this got broken since nothing in CEGUI was changed. Obviously I want to fix this, but it's rather difficult since I don't have access to a Mac, and as such I can't reproduce the issue to debug it

CE.

* Bump *

This yellow background is bugging me too. It makes the fonts almost unreadable. If somebody can point me in the right direction, I will attempt to fix the problem.

Unforunately I am in the same situation as CE was with regards to OSX. I'll see if I can get temas to take a look if he has time, otherwise if anyone with OSX wants to take a stab at fixing this I'd greatly appreciate it.

On the quite likely assumption that I'm going to hit this issue in the near future (trying to get our 'ember' client which is Ogre + CEGUI running), could someone provide a few hints on where this problem lies, so I don't have to learn the entire codebase.

Eg, is it specific to the OGRE renderer? Does it happen on Linux-PPC? Any other hints as to where to start debugging?

In case someone is interested, this is quite an easy fix. As Crazy Eddie suggested, it's an endian issue. All i did was to implement byte swapping in the OgreCEGUITexture.cpp file inside the loadFromMemory member function.

It looks like this now:

//--asu start
//byte swapping utils

void _ByteSwap(unsigned char * b, int n)
{
register int i = 0;
register int j = n-1;
while (i<j)
{
std::swap(b[i], b[j]);
i++, j--;
}
}

#define ByteSwap(x) _ByteSwap((unsigned char *) &x,sizeof(x))
//--asu end

void OgreCEGUITexture::loadFromMemory(const void* buffPtr, uint buffWidth, uint buffHeight)
{
using namespace Ogre;

// get rid of old texture
freeOgreTexture();

// wrap input buffer with an Ogre DataChunk
uint32 bytesize = ((buffWidth * sizeof(uint32)) * buffHeight);

#if OGRE_PLATFORM == OGRE_PLATFORM_APPLE
//do byte swapping -- asu start
uint32 *swappedBuffer = new uint32[bytesize/4];
memcpy(swappedBuffer, buffPtr, bytesize);

for (int i=0;i<bytesize/4;i++)
ByteSwap(swappedBuffer[i]);

DataStreamPtr odc(new MemoryDataStream((void*)(swappedBuffer), bytesize, false));
// -- asu end
#else
DataStreamPtr odc(new MemoryDataStream(const_cast<void*>(buffPtr), bytesize, false));
#endif

// try to create a Ogre::Texture from the input data
d_ogre_texture = TextureManager::getSingleton().loadRawData(getUniqueName(), "General", odc, buffWidth, buffHeight, PF_A8R8G8B8, TEX_TYPE_2D, 0, 1.0f);

// if we got a pointer cache some details
if (!d_ogre_texture.isNull())
{
d_width = d_ogre_texture->getWidth();
d_height = d_ogre_texture->getHeight();
}
// no texture from memory so throw.
else
{
throw RendererException((utf8*)"Failed to create Texture object from memory: Ogre returned a NULL Ogre::Texture pointer.");
}

}

Sorry for the formating. I'm not really used to this...

Cool

Somebody should get this change into CVS.

Do you know if the issue affects the plain OpenGL renderer as well as the Ogre one?

Thanks for that.

CE.

I've committed this to the OGRE renderer with a small modification. Thanks!