In the lazarus revision 11861, the RawImage implementation got changed to a more OO approach, breaking the current implementation of the ImagingComponents.

I attached a patch to resolve this.

It would be useful, if for example CreateGLTextureFromImage/File/etc. would somehow return the size of the texture (for example as var-parameters), as these methods may modify the actual size of the texture (power of 2). The size is always necessary to know (how to draw the texture otherwise?) so it saves time and performance if one does not have to additionally query the texture size from opengl/dx/sdl after creating the texture.

I have a problem generating a texture from an ImageData. The image is generated during runtime as ifA1R5G5B5 by directly writing to the memory behind image.Bits
It is then converted to ifA8R8G8B8 and used throughout the application. If I draw it to a canvas (DisplayImage) it works just fine. I can even save it to a file and it displays just fine. But if I convert it to a texture it is not displayed at all.
To test the behavior I created a bitmap file using delphi's TBitmap.Scanline and saved that as F2A.bmp and created a second one using TImageData.Bits under lazarus and saved it as F2A_.bmp. I then generated the texture by using LoadGLTextureFromFile("F2A.bmp") and for the second one LoadGLTextureFromFile("F2A_.bmp"). The first one (TBitmap generated) is displayed correctly where the second one (TImageData generated) does still not show up, although both files can be viewed in any graphics application (I used xnView and Pixel to test it). Maybe someone can see more, but currently I suspect the problem within the imaging library. I'm just not able to find a solution :(