wined3d: Add a glsl_src_param_t type, pass it to shader_glsl_add_src_param() instead of three separate character arrays.

wined3d: Add a glsl_dst_param_t type, pass it to shader_glsl_add_dst_param() instead of three separate character arrays.

Fix the comment.

Use shader_glsl_get_sample_function().
Use the GLSL builtin reflect() function.

Use shader_glsl_get_sample_function().

Use shader_glsl_get_sample_function().

Use shader_glsl_get_sample_function() rather than having the instruction handler figure it out itself.
Get rid of shader_glsl_add_dst_old().

Use the correct source swizzle.

Take the difference between ps 1.4 and earlier versions into account.

wined3d: Rewrite shader_glsl_lrp() to properly take the write mask into account, use the GLSL mix instruction.