Creates GL texture from image in memory in format supported by Imaging.
function LoadGLTextureFromMemory(Data: Pointer; Size: LongInt; CreatedWidth: PLongInt = nil; CreatedHeight: PLongInt = nil): GLuint;
ImagingOpenGL (at line 102)
You can use CreatedWidth and Height parameters to query dimensions of created textures (it could differ from dimensions of source image).