SM 3.0 can pack multiple "semantics" into 12 generic input/output registers.
To support that, define temporaries called IN and OUT, and use those as
the output registers. At the end of the vshader, unpack the OUT temps
into the proper GL variables. At the beginning of the pshader, pack the
GL variables back into 12 IN registers.
Various cleanups:
- do not use DWORD as a bitmask, that places artificial limit of 32 on
registers
- track attributes that are used and declare only those
- move declarations function call in pshader/vshader to allow us to
insert pixel or vertex specific code between the declarations and
the rest of the code
- remove redundant 0 intializers
- remove useless continue statement
Now that the declaration function is out of the way, the tracing pass,
which is very long and 100% the same can be shared between pixel and
vertex shaders.
The new function is called shader_trace_init(), and is responsible for:
- tracing the shader
- initializing the function length
- setting the shader version [needed very early]
The new function is called in pass 2 (getister counting/maps), and
it's now in baseshader. It operates on all INPUT and OUTPUT registers,
which, in addition to the old vertex shader input declarations covers
Shader Model 3.0 vshader output and pshader input declarations. The
result is stored into the reg_map structure.
Delete the entire namedArrays code path and all its dependencies (one
of which is quite long - storeOrder in drawprim is always FALSE, for
example). Delete declaredArrays, and make its code path the default.
I missed a register mask in the move to share the shader_hw_def()
function between pixel and vertex shaders for ARB shaders. Fixed
that, and made the GLSL version use the same mask for consistency.
- Declare more variable names for GLSL programs.
- Some of these won't need to be declared eventually, but it doesn't hurt to do it for now.
- Correct output name for pixel shaders (gl_FragColor instead of glFragColor).
- Add a new file glsl_shader.c which contains almost every GLSL specific function we'll need
- Move print_glsl_info() into glsl_shader.c
- Move the shader_reg_maps struct info into the private header, and make it part of SHADER_OPCODE_ARG.
- Create a new shared ps/vs register map for float constants (future patch will make ARB programs use this, too)
Each instruction can have a predication token. Account for it in the
trace pass, register count pass, and store it in the SHADER_OPCODE_ARG
structure for generation. MSDN claims the token is at the end of the
instruction, but that's not true - testing a demo, which lets me
manipulate the shader shows the predication token is the first source
token immediately following the destination token.
Currently we hardcode a0.x, which I think is correct for shaders 1.0.
However, for shaders 2.0, we must look into the address token, and
print the register there. Handle both cases to correct the trace.
Change the trace pass, the register counting pass, and the hw
generator pass to take into account the new get_params() function. For
hw generation, store the address tokens into the SHADER_OPCODE_ARG
structure, so they're available to generator functions.
Add a new function to process parameters.
On shaders 1.0, processing parameters amounts to *pToken++.
On shaders 2.0+, we have a relative addressing token to account for.
This function should be used, instead of relying on num_params everywhere.
Share shader_dump_ins_modifiers(), and make vertex shaders use it.
The saturate modifer (_sat) is valid on vs_3_0+, and it isn't being
shown in the trace.
Ivan Gyurdiev