0024192: Adding support for shaders to OCCT visualization toolkit

src/OpenGl/OpenGl_ShaderObject.hxx

@@ -0,0 +1,81 @@
+// Created on: 2013-09-19
+// Created by: Denis BOGOLEPOV
+// Copyright (c) 2013 OPEN CASCADE SAS
+//
+// The content of this file is subject to the Open CASCADE Technology Public
+// License Version 6.5 (the "License"). You may not use the content of this file
+// except in compliance with the License. Please obtain a copy of the License
+// at http://www.opencascade.org and read it completely before using this file.
+//
+// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
+// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
+//
+// The Original Code and all software distributed under the License is
+// distributed on an "AS IS" basis, without warranty of any kind, and the
+// Initial Developer hereby disclaims all such warranties, including without
+// limitation, any warranties of merchantability, fitness for a particular
+// purpose or non-infringement. Please see the License for the specific terms
+// and conditions governing the rights and limitations under the License.
+
+#ifndef _OpenGl_ShaderObject_Header
+#define _OpenGl_ShaderObject_Header
+
+#include <Handle_OpenGl_ShaderObject.hxx>
+#include <Graphic3d_ShaderObject.hxx>
+#include <OpenGl_GlCore20.hxx>
+#include <OpenGl_Resource.hxx>
+
+//! Wrapper for OpenGL shader object.
+class OpenGl_ShaderObject : public OpenGl_Resource
+{
+
+public:
+
+  //! Non-valid shader name.
+  static const GLuint NO_SHADER = 0;
+
+public:
+
+  //! Creates uninitialized shader object.
+  Standard_EXPORT OpenGl_ShaderObject (GLenum theType);
+
+  //! Releases resources of shader object.
+  Standard_EXPORT virtual ~OpenGl_ShaderObject();
+
+  //! Loads shader source code.
+  Standard_EXPORT Standard_Boolean LoadSource (const Handle(OpenGl_Context)&  theCtx,
+                                               const TCollection_AsciiString& theSource);
+
+  //! Compiles the shader object.
+  Standard_EXPORT Standard_Boolean Compile (const Handle(OpenGl_Context)& theCtx);
+
+  //! Initializes (loads and compiles) shader object with the specified description.
+  Standard_EXPORT Standard_Boolean Initialize (const Handle(OpenGl_Context)&         theCtx,
+                                               const Handle(Graphic3d_ShaderObject)& theShader);
+
+  //! Fetches information log of the last compile operation.
+  Standard_EXPORT Standard_Boolean FetchInfoLog (const Handle(OpenGl_Context)& theCtx,
+                                                 TCollection_AsciiString&      theLog);
+
+  //! Creates new empty shader object of specified type.
+  Standard_EXPORT Standard_Boolean Create (const Handle(OpenGl_Context)& theCtx);
+
+  //! Destroys shader object.
+  Standard_EXPORT virtual void Release (const OpenGl_Context* theCtx);
+
+  //! Returns type of shader object.
+  GLenum Type() const { return myType; }
+  
+protected:
+
+  GLenum myType;     //!< Type of OpenGL shader object
+  GLuint myShaderID; //!< Handle of OpenGL shader object
+
+public:
+
+  DEFINE_STANDARD_RTTI (OpenGl_ShaderObject)
+  friend class OpenGl_ShaderProgram;
+
+};
+
+#endif // _OpenGl_ShaderObject_Header