mesa: add KHR_no_error support for glBindProgramPipeline()

Reviewed-by: Eric Anholt <eric@anholt.net>

src/mapi/glapi/gen/ARB_separate_shader_objects.xml

@@ -30,7 +30,7 @@
          <param name="strings" type="const GLchar * const *" />
          <return type="GLuint"/>
       </function>
-      <function name="BindProgramPipeline" es2="3.1">
+      <function name="BindProgramPipeline" es2="3.1" no_error="true">
          <param name="pipeline" type="GLuint" />
       </function>
       <function name="DeleteProgramPipelines" es2="3.1">

src/mesa/main/pipelineobj.c

@@ -431,6 +431,32 @@ _mesa_ActiveShaderProgram(GLuint pipeline, GLuint program)
    _mesa_reference_shader_program(ctx, &pipe->ActiveProgram, shProg);
 }
 
+void GLAPIENTRY
+_mesa_BindProgramPipeline_no_error(GLuint pipeline)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_pipeline_object *newObj = NULL;
+
+   /* Rebinding the same pipeline object: no change.
+    */
+   if (ctx->_Shader->Name == pipeline)
+      return;
+
+   /* Get pointer to new pipeline object (newObj)
+    */
+   if (pipeline) {
+      /* non-default pipeline object */
+      newObj = _mesa_lookup_pipeline_object(ctx, pipeline);
+
+      /* Object is created by any Pipeline call but glGenProgramPipelines,
+       * glIsProgramPipeline and GetProgramPipelineInfoLog
+       */
+      newObj->EverBound = GL_TRUE;
+   }
+
+   _mesa_bind_pipeline(ctx, newObj);
+}
+
 /**
  * Make program of the pipeline current
  */

src/mesa/main/pipelineobj.h

@@ -82,6 +82,8 @@ _mesa_ActiveShaderProgram_no_error(GLuint pipeline, GLuint program);
 extern void GLAPIENTRY
 _mesa_ActiveShaderProgram(GLuint pipeline, GLuint program);
 
+void GLAPIENTRY
+_mesa_BindProgramPipeline_no_error(GLuint pipeline);
 extern void GLAPIENTRY
 _mesa_BindProgramPipeline(GLuint pipeline);