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, 16 insertions, 39 deletions

diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
index 73ae2dea561..2053d02f628 100644
--- a/src/gallium/drivers/softpipe/sp_screen.c
+++ b/src/gallium/drivers/softpipe/sp_screen.c
@@ -31,6 +31,7 @@
 #include "util/u_format_s3tc.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_screen.h"
+#include "draw/draw_context.h"
 
 #include "state_tracker/sw_winsys.h"
 #include "tgsi/tgsi_exec.h"
@@ -98,14 +99,8 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return SP_MAX_TEXTURE_3D_LEVELS;
    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
       return SP_MAX_TEXTURE_2D_LEVELS;
-   case PIPE_CAP_TGSI_CONT_SUPPORTED:
-      return 1;
    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
       return 1;
-   case PIPE_CAP_MAX_CONST_BUFFERS:
-      return PIPE_MAX_CONSTANT_BUFFERS;
-   case PIPE_CAP_MAX_CONST_BUFFER_SIZE:
-      return 4096 * 4 * sizeof(float);
    case PIPE_CAP_INDEP_BLEND_ENABLE:
       return 1;
    case PIPE_CAP_INDEP_BLEND_FUNC:
@@ -117,46 +112,27 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 1;
    case PIPE_CAP_STREAM_OUTPUT:
       return 1;
-
-   case PIPE_CAP_MAX_VS_INSTRUCTIONS:
-   case PIPE_CAP_MAX_FS_INSTRUCTIONS:
-   case PIPE_CAP_MAX_VS_ALU_INSTRUCTIONS:
-   case PIPE_CAP_MAX_FS_ALU_INSTRUCTIONS:
-   case PIPE_CAP_MAX_VS_TEX_INSTRUCTIONS:
-   case PIPE_CAP_MAX_FS_TEX_INSTRUCTIONS:
-   case PIPE_CAP_MAX_VS_TEX_INDIRECTIONS:
-   case PIPE_CAP_MAX_FS_TEX_INDIRECTIONS:
-      /* There is no limit in number of instructions beyond available memory */
-      return 32768;
-   case PIPE_CAP_MAX_VS_CONTROL_FLOW_DEPTH:
-   case PIPE_CAP_MAX_FS_CONTROL_FLOW_DEPTH:
-      return TGSI_EXEC_MAX_NESTING;
-   case PIPE_CAP_MAX_VS_INPUTS:
-   case PIPE_CAP_MAX_FS_INPUTS:
-      return TGSI_EXEC_MAX_INPUT_ATTRIBS;
-   case PIPE_CAP_MAX_FS_CONSTS:
-   case PIPE_CAP_MAX_VS_CONSTS:
-      return TGSI_EXEC_MAX_CONST_BUFFER;
-   case PIPE_CAP_MAX_VS_TEMPS:
-   case PIPE_CAP_MAX_FS_TEMPS:
-      return TGSI_EXEC_NUM_TEMPS;
-   case PIPE_CAP_MAX_VS_ADDRS:
-   case PIPE_CAP_MAX_FS_ADDRS:
-      return TGSI_EXEC_NUM_ADDRS;
-   case PIPE_CAP_MAX_VS_PREDS:
-   case PIPE_CAP_MAX_FS_PREDS:
-      return TGSI_EXEC_NUM_PREDS;
-
    case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
       return 0;
-
-   case PIPE_CAP_GEOMETRY_SHADER4:
-      return 1;
    default:
       return 0;
    }
 }
 
+static int
+softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
+{
+   switch(shader)
+   {
+   case PIPE_SHADER_FRAGMENT:
+      return tgsi_exec_get_shader_param(param);
+   case PIPE_SHADER_VERTEX:
+   case PIPE_SHADER_GEOMETRY:
+      return draw_get_shader_param(shader, param);
+   default:
+      return 0;
+   }
+}
 
 static float
 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
@@ -320,6 +296,7 @@ softpipe_create_screen(struct sw_winsys *winsys)
    screen->base.get_name = softpipe_get_name;
    screen->base.get_vendor = softpipe_get_vendor;
    screen->base.get_param = softpipe_get_param;
+   screen->base.get_shader_param = softpipe_get_shader_param;
    screen->base.get_paramf = softpipe_get_paramf;
    screen->base.is_format_supported = softpipe_is_format_supported;
    screen->base.context_create = softpipe_create_context;