[WINED3D 1] Rework shader mode selection

[Ivan Gyurdiev]

H. Verbeet wrote:
> On 04/07/06, Ivan Gyurdiev <ivg231 at gmail.com> wrote:
>> - Store the shader selected mode into the shader itself. Different types
>> of shaders can be combined, so this is an improvement. In fact, storing
>> the mode into the settings globally is a mistake as well - it should be
>> done per device, since different cards have different capabilities.
> Shouldn't it be stored in the device rather than shader right away
> then? Instead of changing it once again at a later time?
What I'm really trying to accomplish here is to be able to tell the 
shader mode from the BaseShader class without knowing if it's pixel or 
vertex (or doing a type check). The way to do that cleanly is to store 
the type from the parent class.