This way the individual instruction handlers don't have to bother about the
color correction, and there's now a single place to implement fixup dependent
sampling writemask selection.
The color correction cannot be done behind the back of the individual
instruction handlers because it might conflict with the instruction's
color modifications and the D3D provided writemask.
Add a new wined3d-internal PreLoad function to textures and surfaces
that takes a parameter specifying wether the rgb or srgb texture
should be loaded.
This reduces the number of srgb switching reloads quite a lot. The only
situation in which a reload is needed is if the rgb copy is modified on the GL
side and the srgb copy is needed.
This was exposed by adding EXT_vertex_array_bgra support, previously we would
almost never hit this because color data being present would already prevent
us from using drawStridedFast(). Thanks to Stefan for spotting this.
The fog settings do not depend on wether the shader writes to oFog or not,
instead they depend on the FOGVERTEXMODE and FOGTABLEMODE settings, and if a
vertex shader is bound at all.
It works the same way as with the fixed function, and having a vertex shader
is the same as using pretransformed vertices, just that the fog coord comes
from the shader instead of the specular color:
FOGTABLEMODE != NONE: The Z coord is used, oFog is ignored
FOGTABLEMODE == NONE, with VS: oFog is used
FOGTABLEMODE == NONE, no VS, XYZ: Z is used
FOGTABLEMODE == NONE, no VS, XYZRHW: diffuse color is used
Other than being a bit nicer than passing function pointers all over the
place, this helps dxgi/d3d10. While the swapchain itself is created in dxgi,
its surfaces are constructed in d3d10core, which makes it impractical for dxgi
to pass the appropriate function pointers.
Doing the levels calculation before the object is created prevents leaking
resources and avoids changing baseTexture.levels after it's been initialized
by basetexture_init().
This prevents fallout from the GL_EXT_fog_coord emulation. glEnable
and glDisable calls other than those that change GL_FOG are not
hooked. The glEnableWINE and glDisableWINE functions can be used to
add other hooks too if ever needed.
Stefan Dösinger