From 41c4b21d18936488db6de26080e57f712b8a2d87 Mon Sep 17 00:00:00 2001
From: Chris Forbes <chrisf@ijw.co.nz>
Date: Mon, 13 May 2013 21:54:36 +1200
Subject: [PATCH] mesa: Stop clamping stencil reference value at specification
 time

All drivers now clamp this to the appropriate range for the bound
stencil buffer when emitting stencil state.

NOTE: This is a candidate for stable branches.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
(cherry picked from commit 53a5f11f0d89a044546e2bf4396f1972c9d31c4f)
---
 src/mesa/main/stencil.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/src/mesa/main/stencil.c b/src/mesa/main/stencil.c
index 33084173138..655737ea0c6 100644
--- a/src/mesa/main/stencil.c
+++ b/src/mesa/main/stencil.c
@@ -135,7 +135,6 @@ void GLAPIENTRY
 _mesa_StencilFuncSeparateATI( GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask )
 {
    GET_CURRENT_CONTEXT(ctx);
-   const GLint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glStencilFuncSeparateATI()\n");
@@ -151,8 +150,6 @@ _mesa_StencilFuncSeparateATI( GLenum frontfunc, GLenum backfunc, GLint ref, GLui
       return;
    }
 
-   ref = CLAMP( ref, 0, stencilMax );
-
    /* set both front and back state */
    if (ctx->Stencil.Function[0] == frontfunc &&
        ctx->Stencil.Function[1] == backfunc &&
@@ -192,7 +189,6 @@ void GLAPIENTRY
 _mesa_StencilFunc( GLenum func, GLint ref, GLuint mask )
 {
    GET_CURRENT_CONTEXT(ctx);
-   const GLint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
    const GLint face = ctx->Stencil.ActiveFace;
 
    if (MESA_VERBOSE & VERBOSE_API)
@@ -203,8 +199,6 @@ _mesa_StencilFunc( GLenum func, GLint ref, GLuint mask )
       return;
    }
 
-   ref = CLAMP( ref, 0, stencilMax );
-
    if (face != 0) {
       if (ctx->Stencil.Function[face] == func &&
           ctx->Stencil.ValueMask[face] == mask &&
@@ -467,7 +461,6 @@ void GLAPIENTRY
 _mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask)
 {
    GET_CURRENT_CONTEXT(ctx);
-   const GLint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glStencilFuncSeparate()\n");
@@ -481,8 +474,6 @@ _mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask)
       return;
    }
 
-   ref = CLAMP(ref, 0, stencilMax);
-
    FLUSH_VERTICES(ctx, _NEW_STENCIL);
 
    if (face != GL_BACK) {