gallium: introduce get_shader_param (ALL DRIVERS CHANGED) (v3)

Changes in v3:
- Also change trace, which I forgot about

Changes in v2:
- No longer adds tessellation shaders

Currently each shader cap has FS and VS versions.

However, we want a version of them for geometry, tessellation control,
and tessellation evaluation shaders, and want to be able to easily
query a given cap type for a given shader stage.

Since having 5 duplicates of each shader cap is unmanageable, add
a new get_shader_param function that takes both a shader cap from a
new enum and a shader stage.

Drivers with non-unified shaders will first switch on the shader
and, within each case, switch on the cap.

Drivers with unified shaders instead first check whether the shader
is supported, and then switch on the cap.

MAX_CONST_BUFFERS is now per-stage.
The geometry shader cap is removed in favor of checking whether the
limit of geometry shader instructions is greater than 0, which is also
used for tessellation shaders.

WARNING: all drivers changed and compiled but only nvfx tested

1 files changed, 28 insertions, 24 deletions

diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 91bd5a92c92..d637e6f43a0 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -135,38 +135,42 @@ void st_init_limits(struct st_context *st)
       = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
               1, MAX_DRAW_BUFFERS);
 
-   for(i = 0; i < MESA_SHADER_TYPES; ++i)
-      st->ctx->ShaderCompilerOptions[i].EmitNoCont = !screen->get_param(screen, PIPE_CAP_TGSI_CONT_SUPPORTED);
-
    /* Quads always follow GL provoking rules. */
    c->QuadsFollowProvokingVertexConvention = GL_FALSE;
 
-   pc = &c->FragmentProgram;
-   pc->MaxNativeInstructions    = screen->get_param(screen, PIPE_CAP_MAX_FS_INSTRUCTIONS);
-   pc->MaxNativeAluInstructions = screen->get_param(screen, PIPE_CAP_MAX_FS_ALU_INSTRUCTIONS);
-   pc->MaxNativeTexInstructions = screen->get_param(screen, PIPE_CAP_MAX_FS_TEX_INSTRUCTIONS);
-   pc->MaxNativeTexIndirections = screen->get_param(screen, PIPE_CAP_MAX_FS_TEX_INDIRECTIONS);
-   pc->MaxNativeAttribs         = screen->get_param(screen, PIPE_CAP_MAX_FS_INPUTS);
-   pc->MaxNativeTemps           = screen->get_param(screen, PIPE_CAP_MAX_FS_TEMPS);
-   pc->MaxNativeAddressRegs     = screen->get_param(screen, PIPE_CAP_MAX_FS_ADDRS);
-   pc->MaxNativeParameters      = screen->get_param(screen, PIPE_CAP_MAX_FS_CONSTS);
-
-   pc = &c->VertexProgram;
-   pc->MaxNativeInstructions    = screen->get_param(screen, PIPE_CAP_MAX_VS_INSTRUCTIONS);
-   pc->MaxNativeAluInstructions = screen->get_param(screen, PIPE_CAP_MAX_VS_ALU_INSTRUCTIONS);
-   pc->MaxNativeTexInstructions = screen->get_param(screen, PIPE_CAP_MAX_VS_TEX_INSTRUCTIONS);
-   pc->MaxNativeTexIndirections = screen->get_param(screen, PIPE_CAP_MAX_VS_TEX_INDIRECTIONS);
-   pc->MaxNativeAttribs         = screen->get_param(screen, PIPE_CAP_MAX_VS_INPUTS);
-   pc->MaxNativeTemps           = screen->get_param(screen, PIPE_CAP_MAX_VS_TEMPS);
-   pc->MaxNativeAddressRegs     = screen->get_param(screen, PIPE_CAP_MAX_VS_ADDRS);
-   pc->MaxNativeParameters      = screen->get_param(screen, PIPE_CAP_MAX_VS_CONSTS);
+   for(i = 0; i < MESA_SHADER_TYPES; ++i) {
+      struct gl_shader_compiler_options *options = &st->ctx->ShaderCompilerOptions[i];
+      switch(i)
+      {
+      case PIPE_SHADER_FRAGMENT:
+         pc = &c->FragmentProgram;
+         break;
+      case PIPE_SHADER_VERTEX:
+         pc = &c->VertexProgram;
+         break;
+      case PIPE_SHADER_GEOMETRY:
+         pc = &c->GeometryProgram;
+         break;
+      }
+
+      pc->MaxNativeInstructions    = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
+      pc->MaxNativeAluInstructions = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
+      pc->MaxNativeTexInstructions = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
+      pc->MaxNativeTexIndirections = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
+      pc->MaxNativeAttribs         = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_INPUTS);
+      pc->MaxNativeTemps           = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_TEMPS);
+      pc->MaxNativeAddressRegs     = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_ADDRS);
+      pc->MaxNativeParameters      = screen->get_shader_param(screen, i, PIPE_SHADER_CAP_MAX_CONSTS);
+
+      options->EmitNoCont = !screen->get_shader_param(screen, i, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
+   }
 
    /* PIPE_CAP_MAX_FS_INPUTS specifies the number of COLORn + GENERICn inputs
     * and is set in MaxNativeAttribs. It's always 2 colors + N generic
     * attributes. The GLSL compiler never uses COLORn for varyings, so we
     * subtract the 2 colors to get the maximum number of varyings (generic
     * attributes) supported by a driver. */
-   c->MaxVarying = screen->get_param(screen, PIPE_CAP_MAX_FS_INPUTS) - 2;
+   c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT, PIPE_SHADER_CAP_MAX_INPUTS) - 2;
    c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
 }
 
@@ -401,7 +405,7 @@ void st_init_extensions(struct st_context *st)
    }
 #endif
 
-   if (screen->get_param(screen, PIPE_CAP_GEOMETRY_SHADER4)) {
+   if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY, PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
       ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
    }