setRamMipmapPointerFromInt does not work unless makeRamImage also called

[Andrew Wason]

Ubuntu 11.10 64bit, using panda CVS

I'm using Texture.setRamMipmapPointerFromInt(). I set a breakpoint in Texture::set_ram_mipmap_pointer() and confirmed the data pointer is correct and contains my RGB data.

However, in GLGraphicsStateGuardian::upload_texture_image() it seems like my pointer is not used because the CPTA_uchar from tex->get_ram_mipmap_image() is_null(). I set a breakpoint in Texture::get_ram_mipmap_pointer() and it is never called. So upload_texture_image() seems to need a non-empty RamImage before it will attempt to use the pointer.

If in my Python code I call Texture.makeRamImage(), then everything works. But it seems like a waste to allocate a full RAM image when my pointer will end up being used instead.

Attached is a sample code that loads raw RGB data into a ctypes buffer, then passes the address to setRamMipmapPointerFromInt. This displays garbage or black. If the call to makeRamImage is uncommented, it works.

[rdb (rdb)]

Fixed in 64a7fbab873dedf8aaa6fb1993bc16ed12f0f0bd on master branch.