Mesa (master): meta/sso: Update meta to save and restore SSO state.

[Ian Romanick]

Module: Mesa
Branch: master
Commit: de4f85f52d0002cfd0105e932141cfdb108f1a61
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=de4f85f52d0002cfd0105e932141cfdb108f1a61

Author: Gregory Hainaut <gregory.hainaut at gmail.com>
Date:   Fri May  3 19:44:11 2013 +0200

meta/sso: Update meta to save and restore SSO state.

save and restore _Shader/Pipeline binding point. Rational we don't want any
conflict when the program will be unattached.

V2: formatting improvement

V3 (idr):
* Build fix.  The original patch added calls to _mesa_use_shader_program
  with 4 parameters, but the fourth parameter isn't added to that
  function until a much later patch.  Just drop that parameter for now.

Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
Reviewed-by: Eric Anholt <eric at anholt.net>

---

 src/mesa/drivers/common/meta.c |   18 ++++++++++++++++++
 src/mesa/drivers/common/meta.h |    2 ++
 2 files changed, 20 insertions(+)

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index 0abdfb2..dbc6ab2 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -53,6 +53,7 @@
 #include "main/mipmap.h"
 #include "main/multisample.h"
 #include "main/objectlabel.h"
+#include "main/pipelineobj.h"
 #include "main/pixel.h"
 #include "main/pbo.h"
 #include "main/polygon.h"
@@ -535,6 +536,14 @@ _mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
          _mesa_set_enable(ctx, GL_FRAGMENT_SHADER_ATI, GL_FALSE);
       }
 
+      if (ctx->Extensions.ARB_separate_shader_objects) {
+         /* Warning it must be done before _mesa_UseProgram call */
+         _mesa_reference_pipeline_object(ctx, &save->_Shader, ctx->_Shader);
+         _mesa_reference_pipeline_object(ctx, &save->Pipeline,
+                                         ctx->Pipeline.Current);
+         _mesa_BindProgramPipeline(0);
+      }
+
       for (i = 0; i < MESA_SHADER_STAGES; i++) {
          _mesa_reference_shader_program(ctx, &save->Shader[i],
                                      ctx->_Shader->CurrentProgram[i]);
@@ -880,6 +889,14 @@ _mesa_meta_end(struct gl_context *ctx)
                           save->ATIFragmentShaderEnabled);
       }
 
+      /* Warning it must be done before _mesa_use_shader_program call */
+      if (ctx->Extensions.ARB_separate_shader_objects) {
+         _mesa_reference_pipeline_object(ctx, &ctx->_Shader, save->_Shader);
+         _mesa_reference_pipeline_object(ctx, &ctx->Pipeline.Current,
+                                         save->Pipeline);
+         _mesa_reference_pipeline_object(ctx, &save->Pipeline, NULL);
+      }
+
       if (ctx->Extensions.ARB_vertex_shader) {
 	 _mesa_use_shader_program(ctx, GL_VERTEX_SHADER,
                                   save->Shader[MESA_SHADER_VERTEX]);
@@ -899,6 +916,7 @@ _mesa_meta_end(struct gl_context *ctx)
       for (i = 0; i < MESA_SHADER_STAGES; i++)
          _mesa_reference_shader_program(ctx, &save->Shader[i], NULL);
       _mesa_reference_shader_program(ctx, &save->ActiveShader, NULL);
+      _mesa_reference_pipeline_object(ctx, &save->_Shader, NULL);
    }
 
    if (state & MESA_META_STENCIL_TEST) {
diff --git a/src/mesa/drivers/common/meta.h b/src/mesa/drivers/common/meta.h
index e2ccb93..4faae0b 100644
--- a/src/mesa/drivers/common/meta.h
+++ b/src/mesa/drivers/common/meta.h
@@ -121,6 +121,8 @@ struct save_state
    GLboolean ATIFragmentShaderEnabled;
    struct gl_shader_program *Shader[MESA_SHADER_STAGES];
    struct gl_shader_program *ActiveShader;
+   struct gl_pipeline_object   *_Shader;
+   struct gl_pipeline_object   *Pipeline;
 
    /** MESA_META_STENCIL_TEST */
    struct gl_stencil_attrib Stencil;