The opengl extension mentioned in that code was never finished, and as
far as I know there is no way to make use of tangent data in the d3d
fixed function pipeline as well.
Note that GL_ATI_envmap_bumpmap is not the same as
GL_ATI_fragment_shader. envmap_bumpmap is used together with the
regular opengl ffp pipeline and is not used (other than for
pixelformats) if GL_ATI_fragment_shader is used.
This patch adds a new field to the state templates. If this extension
field is != 0, then the line is only applied to the final state table
if the extension is supported. Once a line is applied to the final
table, all further templates for this state from the same pipeline
part are ignored. This allows removing some extension checks from the
state handlers, which cleans them up and saves a few CPU cycles when
applying the states.
As long as we have the shader constants in misc, it is best to keep
all the code that affects shader constants, like bumpenvmat setting,
in there as well.
This code creates the structures and the pipeline selection, as well
as the caps filling. It does not yet move the actual code around,
since this will be a bigger task.
When a sampler is changed and unconditional NP2 textures are not
supported, the texture matrix may need adjustment. The sampler state
function checks for that, and calls the texture transform setting
function in that case. However, samplers are a misc state, and the
texture transform flags a vertex state. Thus split up the code and
move the matrix changes to the vertex side.
Since atifs is only doing the fragment pipeline replacement right now
there is no need for the shader backend structure any longer. The ffp
private data is stored in new fragment pipeline private data(which
could potentially be set to equal the shader private data if needed).
It isn't related to the shader backend any longer. The nvts_enable in
the ffp code isn't quite right as well, it should be moved away once
there is a dedicated nvts fragment pipeline replacement
