X-Git-Url: http://git.dev.opencascade.org/gitweb/?p=occt.git;a=blobdiff_plain;f=src%2FOpenGl%2FOpenGl_ShaderObject.hxx;h=85709787a26ad5500e063d157eb79733f84d935c;hb=3b4c69452bc6cf55a39bb98281b919a4b0fc6587;hpb=87a64d53ab4714dcaa89370d3c1b47f7d378d4ad

diff --git a/src/OpenGl/OpenGl_ShaderObject.hxx b/src/OpenGl/OpenGl_ShaderObject.hxx
index 41120d3d9a..85709787a2 100755
--- a/src/OpenGl/OpenGl_ShaderObject.hxx
+++ b/src/OpenGl/OpenGl_ShaderObject.hxx
@@ -30,6 +30,46 @@ public:
   //! Non-valid shader name.
   static const GLuint NO_SHADER = 0;
 
+public:
+
+  //! Structure defining shader uniform or in/out variable.
+  struct ShaderVariable
+  {
+    TCollection_AsciiString Name;   //!< variable name
+    Standard_Integer        Stages; //!< active stages as Graphic3d_TypeOfShaderObject bits;
+                                    //!  for in/out variables, intermediate stages will be automatically filled
+
+    //! Create new shader variable.
+    ShaderVariable (const TCollection_AsciiString& theVarName, Standard_Integer theShaderStageBits) : Name (theVarName), Stages (theShaderStageBits) {}
+
+    //! Empty constructor.
+    ShaderVariable() : Stages (0) {}
+  };
+
+  //! List of variable of shader program.
+  typedef NCollection_Sequence<ShaderVariable> ShaderVariableList;
+
+  //! This is a preprocessor for Graphic3d_ShaderObject::CreateFromSource() function.
+  //! Creates a new shader object from specified source according to list of uniforms and in/out variables.
+  //! @param theSource      shader object source code to modify
+  //! @param theType        shader object type to create
+  //! @param theUniforms    list of uniform variables
+  //! @param theStageInOuts list of stage in/out variables
+  //! @param theInName      name of input  variables block;
+  //!                       can be empty for accessing each variable without block prefix
+  //!                       (mandatory for stages accessing both inputs and outputs)
+  //! @param theOutName     name of output variables block;
+  //!                       can be empty for accessing each variable without block prefix
+  //!                       (mandatory for stages accessing both inputs and outputs)
+  //! @param theNbGeomInputVerts number of geometry shader input vertexes
+  Standard_EXPORT static Handle(Graphic3d_ShaderObject) CreateFromSource (TCollection_AsciiString& theSource,
+                                                                          Graphic3d_TypeOfShaderObject theType,
+                                                                          const ShaderVariableList& theUniforms,
+                                                                          const ShaderVariableList& theStageInOuts,
+                                                                          const TCollection_AsciiString& theInName  = TCollection_AsciiString(),
+                                                                          const TCollection_AsciiString& theOutName = TCollection_AsciiString(),
+                                                                          Standard_Integer theNbGeomInputVerts = 0);
+
 public:
 
   //! Creates uninitialized shader object.