Mesa (master): i965: Support the allow_glsl_extension_directive_midshader option.

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 31f1cbc24ddc32c2a7b768f9c017f2c7161c7728
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=31f1cbc24ddc32c2a7b768f9c017f2c7161c7728

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Fri Aug  8 01:03:15 2014 -0700

i965: Support the allow_glsl_extension_directive_midshader option.

This adds support for Marek's new driconf parameter, which avoids
totally white rendering in Unigine Valley (which attempts to enable
the GL_ARB_sample_shading extension in an illegal place).

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=75664
Reviewed-by: Matt Turner <mattst88 at gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>

---

 src/mesa/drivers/dri/i965/brw_context.c  |    3 +++
 src/mesa/drivers/dri/i965/intel_screen.c |    1 +
 2 files changed, 4 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 52f2557..402d936 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -570,6 +570,9 @@ brw_process_driconf_options(struct brw_context *brw)
 
    ctx->Const.DisableGLSLLineContinuations =
       driQueryOptionb(options, "disable_glsl_line_continuations");
+
+   ctx->Const.AllowGLSLExtensionDirectiveMidShader =
+      driQueryOptionb(options, "allow_glsl_extension_directive_midshader");
 }
 
 GLboolean
diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index 5ebf1d5..ea0fc58 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -84,6 +84,7 @@ DRI_CONF_BEGIN
       DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
       DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
       DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")
+      DRI_CONF_ALLOW_GLSL_EXTENSION_DIRECTIVE_MIDSHADER("false")
 
       DRI_CONF_OPT_BEGIN_B(shader_precompile, "true")
 	 DRI_CONF_DESC(en, "Perform code generation at shader link time.")