// Created on: 2012-01-26
// Created by: Kirill GAVRILOV
-// Copyright (c) 2012-2012 OPEN CASCADE SAS
+// Copyright (c) 2012-2014 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.
+// This file is part of Open CASCADE Technology software library.
//
-// 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.
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
//
-// 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.
-
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
#ifndef _OpenGl_Context_H__
#define _OpenGl_Context_H__
#include <Aspect_Drawable.hxx>
#include <Aspect_Display.hxx>
#include <Aspect_RenderingContext.hxx>
+#include <Handle_OpenGl_Context.hxx>
+#include <Handle_OpenGl_Sampler.hxx>
+#include <Handle_OpenGl_ShaderManager.hxx>
+#include <Handle_OpenGl_ShaderProgram.hxx>
+#include <NCollection_DataMap.hxx>
+#include <NCollection_Map.hxx>
+#include <NCollection_Handle.hxx>
+#include <NCollection_List.hxx>
+#include <Message.hxx>
+#include <OpenGl_Caps.hxx>
+#include <OpenGl_Vec.hxx>
+#include <OpenGl_Resource.hxx>
#include <Standard_Transient.hxx>
#include <TCollection_AsciiString.hxx>
#include <Handle_OpenGl_Context.hxx>
+#include <OpenGl_Clipping.hxx>
+#include <OpenGl_GlCore11.hxx>
//! Forward declarations
-struct OpenGl_GlCore12;
+struct OpenGl_GlFunctions;
+struct OpenGl_ArbTBO;
+struct OpenGl_ArbIns;
+struct OpenGl_ArbDbg;
+struct OpenGl_ArbFBO;
+struct OpenGl_ExtGS;
+struct OpenGl_ArbTexBindless;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore12;
+typedef OpenGl_TmplCore12<OpenGl_GlCore11> OpenGl_GlCore12;
+typedef OpenGl_TmplCore12<OpenGl_GlCore11Fwd> OpenGl_GlCore12Fwd;
+
struct OpenGl_GlCore13;
-struct OpenGl_GlCore14;
-struct OpenGl_GlCore15;
-struct OpenGl_GlCore20;
-struct OpenGl_ArbVBO;
-struct OpenGl_ExtFBO;
+struct OpenGl_GlCore13Fwd;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore14;
+typedef OpenGl_TmplCore14<OpenGl_GlCore13> OpenGl_GlCore14;
+typedef OpenGl_TmplCore14<OpenGl_GlCore13Fwd> OpenGl_GlCore14Fwd;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore15;
+typedef OpenGl_TmplCore15<OpenGl_GlCore14> OpenGl_GlCore15;
+typedef OpenGl_TmplCore15<OpenGl_GlCore14Fwd> OpenGl_GlCore15Fwd;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore20;
+typedef OpenGl_TmplCore20<OpenGl_GlCore15> OpenGl_GlCore20;
+typedef OpenGl_TmplCore20<OpenGl_GlCore15Fwd> OpenGl_GlCore20Fwd;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore21;
+typedef OpenGl_TmplCore21<OpenGl_GlCore20> OpenGl_GlCore21;
+typedef OpenGl_TmplCore21<OpenGl_GlCore20Fwd> OpenGl_GlCore21Fwd;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore30;
+typedef OpenGl_TmplCore30<OpenGl_GlCore21> OpenGl_GlCore30;
+typedef OpenGl_TmplCore30<OpenGl_GlCore21Fwd> OpenGl_GlCore30Fwd;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore31;
+typedef OpenGl_TmplCore31<OpenGl_GlCore30> OpenGl_GlCore31Back;
+typedef OpenGl_TmplCore31<OpenGl_GlCore30Fwd> OpenGl_GlCore31;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore32;
+typedef OpenGl_TmplCore32<OpenGl_GlCore31Back> OpenGl_GlCore32Back;
+typedef OpenGl_TmplCore32<OpenGl_GlCore31> OpenGl_GlCore32;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore33;
+typedef OpenGl_TmplCore33<OpenGl_GlCore32Back> OpenGl_GlCore33Back;
+typedef OpenGl_TmplCore33<OpenGl_GlCore32> OpenGl_GlCore33;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore40;
+typedef OpenGl_TmplCore40<OpenGl_GlCore33Back> OpenGl_GlCore40Back;
+typedef OpenGl_TmplCore40<OpenGl_GlCore33> OpenGl_GlCore40;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore41;
+typedef OpenGl_TmplCore41<OpenGl_GlCore40Back> OpenGl_GlCore41Back;
+typedef OpenGl_TmplCore41<OpenGl_GlCore40> OpenGl_GlCore41;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore42;
+typedef OpenGl_TmplCore42<OpenGl_GlCore41Back> OpenGl_GlCore42Back;
+typedef OpenGl_TmplCore42<OpenGl_GlCore41> OpenGl_GlCore42;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore43;
+typedef OpenGl_TmplCore43<OpenGl_GlCore42Back> OpenGl_GlCore43Back;
+typedef OpenGl_TmplCore43<OpenGl_GlCore42> OpenGl_GlCore43;
+
+template<typename theBaseClass_t> struct OpenGl_TmplCore44;
+typedef OpenGl_TmplCore44<OpenGl_GlCore43Back> OpenGl_GlCore44Back;
+typedef OpenGl_TmplCore44<OpenGl_GlCore43> OpenGl_GlCore44;
//! This class generalize access to the GL context and available extensions.
//!
//!
//! Current implementation provide access to OpenGL core functionality up to 2.0 version
//! (core12, core13, core14, core15, fields core20).
-//! within several extensions (arbVBO, extFBO, etc.).
+//! within several extensions (arbTBO, arbFBO, etc.).
//!
//! Simplified extensions classification:
//! - prefixed with NV, AMD, ATI are vendor-specific (however may be provided by other vendors in some cases);
//! for each GL context individually.
class OpenGl_Context : public Standard_Transient
{
+public:
+
+ //! Function for getting power of to number larger or equal to input number.
+ //! @param theNumber number to 'power of two'
+ //! @param theThreshold upper threshold
+ //! @return power of two number
+ inline static Standard_Integer GetPowerOfTwo (const Standard_Integer theNumber,
+ const Standard_Integer theThreshold)
+ {
+ for (Standard_Integer p2 = 2; p2 <= theThreshold; p2 <<= 1)
+ {
+ if (theNumber <= p2)
+ {
+ return p2;
+ }
+ }
+ return theThreshold;
+ }
+
public:
//! Empty constructor. You should call Init() to perform initialization with bound GL context.
- Standard_EXPORT OpenGl_Context();
+ Standard_EXPORT OpenGl_Context (const Handle(OpenGl_Caps)& theCaps = NULL);
//! Destructor.
Standard_EXPORT virtual ~OpenGl_Context();
- //! Initialize available extensions.
- //! GL context should be active!
+ //! Release all resources, including shared ones
+ Standard_EXPORT void forcedRelease();
+
+ //! Share GL context resources.
+ //! theShareCtx - handle to context to retrieve handles to shared resources.
+ Standard_EXPORT void Share (const Handle(OpenGl_Context)& theShareCtx);
+
+ //! Initialize class from currently bound OpenGL context. Method should be called only once.
+ //! @return false if no GL context is bound to the current thread
Standard_EXPORT Standard_Boolean Init();
-#if (defined(_WIN32) || defined(__WIN32__))
+ //! @return true if this context is valid (has been initialized)
+ inline Standard_Boolean IsValid() const
+ {
+ return myIsInitialized;
+ }
+
+#if defined(HAVE_EGL)
+ //! Initialize class from specified surface and rendering context. Method should be called only once.
+ //! @return false if OpenGL context can not be bound to specified surface
+ Standard_EXPORT Standard_Boolean Init (const Aspect_Drawable theEglSurface,
+ const Aspect_Display theEglDisplay,
+ const Aspect_RenderingContext theEglContext);
+#elif defined(_WIN32)
+ //! Initialize class from specified window and rendering context. Method should be called only once.
+ //! @return false if OpenGL context can not be bound to specified window
Standard_EXPORT Standard_Boolean Init (const Aspect_Handle theWindow,
const Aspect_Handle theWindowDC,
const Aspect_RenderingContext theGContext);
+
+ //! @return the window handle (HWND) currently bound to this OpenGL context
+ inline Aspect_Handle Window() const
+ {
+ return myWindow;
+ }
+
+#elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
+ //! Initialize class from specified OpenGL context (NSOpenGLContext). Method should be called only once.
+ Standard_EXPORT Standard_Boolean Init (const void* theGContext);
#else
+ //! Initialize class from specified window and rendering context. Method should be called only once.
+ //! @return false if OpenGL context can not be bound to specified window
Standard_EXPORT Standard_Boolean Init (const Aspect_Drawable theWindow,
const Aspect_Display theDisplay,
const Aspect_RenderingContext theGContext);
+
+ //! @return the window handle (GLXDrawable) currently bound to this OpenGL context
+ inline Aspect_Drawable Window() const
+ {
+ return myWindow;
+ }
#endif
//! Check if theExtName extension is supported by active GL context.
Standard_EXPORT Standard_Boolean CheckExtension (const char* theExtName) const;
+ //! Check if theExtName extension is in extensions string.
+ Standard_EXPORT static Standard_Boolean CheckExtension (const char* theExtString,
+ const char* theExtName);
+
//! Auxiliary template to retrieve GL function pointer.
//! Pointer to function retrieved from library is statically casted
//! to requested type - there no way to check real signature of exported function.
//! @return true if detected GL version is greater or equal to requested one.
inline Standard_Boolean IsGlGreaterEqual (const Standard_Integer theVerMajor,
- const Standard_Integer theVerMinor)
+ const Standard_Integer theVerMinor) const
{
return (myGlVerMajor > theVerMajor)
|| (myGlVerMajor == theVerMajor && myGlVerMinor >= theVerMinor);
//! Class should be initialized with appropriate info.
Standard_EXPORT Standard_Boolean MakeCurrent();
- //! Return true if active mode is GL_FEEDBACK (cached state)
- Standard_EXPORT Standard_Boolean IsFeedback() const;
+ //! Swap front/back buffers for this GL context (should be activated before!).
+ Standard_EXPORT void SwapBuffers();
+
+ //! Return true if active mode is GL_RENDER (cached state)
+ Standard_Boolean IsRender() const
+ {
+ #if !defined(GL_ES_VERSION_2_0)
+ return myRenderMode == GL_RENDER;
+ #else
+ return Standard_True;
+ #endif
+ }
- //! Setup feedback mode cached state
- Standard_EXPORT void SetFeedback (const Standard_Boolean theFeedbackOn);
+ //! Return true if active mode is GL_FEEDBACK (cached state)
+ Standard_Boolean IsFeedback() const
+ {
+ #if !defined(GL_ES_VERSION_2_0)
+ return myRenderMode == GL_FEEDBACK;
+ #else
+ return Standard_False;
+ #endif
+ }
//! This function retrieves information from GL about free GPU memory that is:
//! - OS-dependent. On some OS it is per-process and on others - for entire system.
//! and contains more vendor-specific values than AvailableMemory().
Standard_EXPORT TCollection_AsciiString MemoryInfo() const;
+ //! Access shared resource by its name.
+ //! @param theKey - unique identifier;
+ //! @return handle to shared resource or NULL.
+ Standard_EXPORT const Handle(OpenGl_Resource)& GetResource (const TCollection_AsciiString& theKey) const;
+
+ //! Access shared resource by its name.
+ //! @param theKey - unique identifier;
+ //! @param theValue - handle to fill;
+ //! @return true if resource was shared.
+ template<typename TheHandleType>
+ Standard_Boolean GetResource (const TCollection_AsciiString& theKey,
+ TheHandleType& theValue) const
+ {
+ const Handle(OpenGl_Resource)& aResource = GetResource (theKey);
+ if (aResource.IsNull())
+ {
+ return Standard_False;
+ }
+
+ theValue = TheHandleType::DownCast (aResource);
+ return !theValue.IsNull();
+ }
+
+ //! Register shared resource.
+ //! Notice that after registration caller shouldn't release it by himself -
+ //! it will be automatically released on context destruction.
+ //! @param theKey - unique identifier, shouldn't be empty;
+ //! @param theResource - new resource to register, shouldn't be NULL.
+ Standard_EXPORT Standard_Boolean ShareResource (const TCollection_AsciiString& theKey,
+ const Handle(OpenGl_Resource)& theResource);
+
+ //! Release shared resource.
+ //! If there are more than one reference to this resource
+ //! (also used by some other existing object) then call will be ignored.
+ //! This means that current object itself should nullify handle before this call.
+ //! Notice that this is unrecommended operation at all and should be used
+ //! only in case of fat resources to release memory for other needs.
+ //! @param theKey unique identifier
+ //! @param theToDelay postpone release until next redraw call
+ Standard_EXPORT void ReleaseResource (const TCollection_AsciiString& theKey,
+ const Standard_Boolean theToDelay = Standard_False);
+
+ //! Append resource to queue for delayed clean up.
+ //! Resources in this queue will be released at next redraw call.
+ Standard_EXPORT void DelayedRelease (Handle(OpenGl_Resource)& theResource);
+
+ //! Clean up the delayed release queue.
+ Standard_EXPORT void ReleaseDelayed();
+
+ //! @return tool for management of clippings within this context.
+ inline OpenGl_Clipping& ChangeClipping() { return myClippingState; }
+
+ //! @return tool for management of clippings within this context.
+ inline const OpenGl_Clipping& Clipping() const { return myClippingState; }
+
+ //! @return tool for management of shader programs within this context.
+ inline const Handle(OpenGl_ShaderManager)& ShaderManager() const { return myShaderManager; }
+
+public:
+
+ //! Either GL_CLAMP_TO_EDGE (1.2+) or GL_CLAMP (1.1).
+ Standard_Integer TextureWrapClamp() const { return myTexClamp; }
+
+ //! @return maximum degree of anisotropy texture filter
+ Standard_EXPORT Standard_Integer MaxDegreeOfAnisotropy() const;
+
+ //! @return value for GL_MAX_TEXTURE_SIZE
+ Standard_EXPORT Standard_Integer MaxTextureSize() const;
+
+ //! Get maximum number of clip planes supported by OpenGl.
+ //! This value is implementation dependent. At least 6
+ //! planes should be supported by OpenGl (see specs).
+ //! @return value for GL_MAX_CLIP_PLANES
+ Standard_EXPORT Standard_Integer MaxClipPlanes() const;
+
+ //! Returns true if VBO is supported and permitted.
+ inline bool ToUseVbo() const
+ {
+ return core15fwd != NULL
+ && !caps->vboDisable;
+ }
+
+ //! @return cached state of GL_NORMALIZE.
+ Standard_Boolean IsGlNormalizeEnabled() const { return myIsGlNormalizeEnabled; }
+
+ //! Sets GL_NORMALIZE enabled or disabled.
+ //! @return old value of the flag
+ Standard_EXPORT Standard_Boolean SetGlNormalizeEnabled (Standard_Boolean isEnabled);
+
+public:
+
+ //! @return messenger instance
+ inline const Handle(Message_Messenger)& Messenger() const
+ {
+ return ::Message::DefaultMessenger();
+ }
+
+ //! Callback for GL_ARB_debug_output extension
+ //! @param theSource message source within GL_DEBUG_SOURCE_ enumeration
+ //! @param theType message type within GL_DEBUG_TYPE_ enumeration
+ //! @param theId message ID within source
+ //! @param theSeverity message severity within GL_DEBUG_SEVERITY_ enumeration
+ //! @param theMessage the message itself
+ Standard_EXPORT void PushMessage (const unsigned int theSource,
+ const unsigned int theType,
+ const unsigned int theId,
+ const unsigned int theSeverity,
+ const TCollection_ExtendedString& theMessage);
+
+
+
+ //! @return true if OpenGl context supports left and
+ //! right rendering buffers.
+ Standard_Boolean HasStereoBuffers() const
+ {
+ #if !defined(GL_ES_VERSION_2_0)
+ return myIsStereoBuffers;
+ #else
+ return Standard_False;
+ #endif
+ }
+
+public: //! @name methods to alter or retrieve current state
+
+ //! Switch to left stereographic rendering buffer.
+ //! This method can be used to keep unchanged choise
+ //! of front/back/both buffer rendering.
+ Standard_EXPORT void SetDrawBufferLeft();
+
+ //! Switch to right stereographic rendering buffer.
+ //! This method can be used to keep unchanged choise
+ //! of front/back/both buffer rendering.
+ Standard_EXPORT void SetDrawBufferRight();
+
+ //! Switch to non-stereographic rendering buffer.
+ //! This method can be used to keep unchanged choise
+ //! of front/back/both buffer rendering.
+ Standard_EXPORT void SetDrawBufferMono();
+
+ //! Fetch OpenGl context state. This class tracks value of several OpenGl
+ //! state variables. Consulting the cached values is quicker than
+ //! doing the same via OpenGl API. Call this method if any of the controlled
+ //! OpenGl state variables has a possibility of being out-of-date.
+ Standard_EXPORT void FetchState();
+
+ //! @return active GLSL program
+ const Handle(OpenGl_ShaderProgram)& ActiveProgram() const
+ {
+ return myActiveProgram;
+ }
+
+ //! @return OpenGL sampler object used to override default texture parameters
+ const Handle(OpenGl_Sampler)& TextureSampler()
+ {
+ return myTexSampler;
+ }
+
+ //! Bind specified program to current context,
+ //! or unbind previous one when NULL specified.
+ //! @return true if some program is bound to context
+ Standard_EXPORT Standard_Boolean BindProgram (const Handle(OpenGl_ShaderProgram)& theProgram);
+
+ //! Setup current color.
+ Standard_EXPORT void SetColor4fv (const OpenGl_Vec4& theColor);
+
+ //! Setup point size.
+ Standard_EXPORT void SetPointSize (const Standard_ShortReal theSize);
+
private:
//! Wrapper to system function to retrieve GL function pointer by name.
//! Private initialization function that should be called only once.
Standard_EXPORT void init();
-public: // core profiles
-
- OpenGl_GlCore12* core12;
- OpenGl_GlCore13* core13;
- OpenGl_GlCore14* core14;
- OpenGl_GlCore15* core15;
- OpenGl_GlCore20* core20;
-
-public: // extensions
-
- OpenGl_ArbVBO* arbVBO; //!< GL_ARB_vertex_buffer_object
- OpenGl_ExtFBO* extFBO; //!< GL_EXT_framebuffer_object
- Standard_Boolean atiMem; //!< GL_ATI_meminfo
- Standard_Boolean nvxMem; //!< GL_NVX_gpu_memory_info
-
-private:
-
-#if (defined(_WIN32) || defined(__WIN32__))
+public: //! @name core profiles
+
+ OpenGl_GlCore11* core11; //!< OpenGL 1.1 core functionality
+ OpenGl_GlCore11Fwd* core11fwd; //!< OpenGL 1.1 without deprecated entry points
+ OpenGl_GlCore15* core15; //!< OpenGL 1.5 core functionality
+ OpenGl_GlCore15Fwd* core15fwd; //!< OpenGL 1.5 without deprecated entry points
+ OpenGl_GlCore20* core20; //!< OpenGL 2.0 core functionality (includes 1.5)
+ OpenGl_GlCore20Fwd* core20fwd; //!< OpenGL 2.0 without deprecated entry points
+ OpenGl_GlCore32* core32; //!< OpenGL 3.2 core profile
+ OpenGl_GlCore32Back* core32back; //!< OpenGL 3.2 backward compatibility profile
+ OpenGl_GlCore33* core33; //!< OpenGL 3.3 core profile
+ OpenGl_GlCore33Back* core33back; //!< OpenGL 3.3 backward compatibility profile
+ OpenGl_GlCore41* core41; //!< OpenGL 4.1 core profile
+ OpenGl_GlCore41Back* core41back; //!< OpenGL 4.1 backward compatibility profile
+ OpenGl_GlCore42* core42; //!< OpenGL 4.2 core profile
+ OpenGl_GlCore42Back* core42back; //!< OpenGL 4.2 backward compatibility profile
+ OpenGl_GlCore43* core43; //!< OpenGL 4.3 core profile
+ OpenGl_GlCore43Back* core43back; //!< OpenGL 4.3 backward compatibility profile
+ OpenGl_GlCore44* core44; //!< OpenGL 4.4 core profile
+ OpenGl_GlCore44Back* core44back; //!< OpenGL 4.4 backward compatibility profile
+
+ Handle(OpenGl_Caps) caps; //!< context options
+
+public: //! @name extensions
+
+ Standard_Boolean hasHighp; //!< highp in GLSL ES fragment shader is supported
+ Standard_Boolean hasTexRGBA8; //!< always available on desktop; on OpenGL ES - since 3.0 or as extension GL_OES_rgb8_rgba8
+ Standard_Boolean arbNPTW; //!< GL_ARB_texture_non_power_of_two
+ Standard_Boolean arbTexRG; //!< GL_ARB_texture_rg
+ OpenGl_ArbTexBindless* arbTexBindless; //!< GL_ARB_bindless_texture
+ OpenGl_ArbTBO* arbTBO; //!< GL_ARB_texture_buffer_object
+ Standard_Boolean arbTboRGB32; //!< GL_ARB_texture_buffer_object_rgb32 (3-component TBO), in core since 4.0
+ OpenGl_ArbIns* arbIns; //!< GL_ARB_draw_instanced
+ OpenGl_ArbDbg* arbDbg; //!< GL_ARB_debug_output
+ OpenGl_ArbFBO* arbFBO; //!< GL_ARB_framebuffer_object
+ OpenGl_ExtGS* extGS; //!< GL_EXT_geometry_shader4
+ Standard_Boolean extBgra; //!< GL_EXT_bgra or GL_EXT_texture_format_BGRA8888 on OpenGL ES
+ Standard_Boolean extAnis; //!< GL_EXT_texture_filter_anisotropic
+ Standard_Boolean extPDS; //!< GL_EXT_packed_depth_stencil
+ Standard_Boolean atiMem; //!< GL_ATI_meminfo
+ Standard_Boolean nvxMem; //!< GL_NVX_gpu_memory_info
+
+private: // system-dependent fields
+
+#if defined(HAVE_EGL)
+ Aspect_Drawable myWindow; //!< EGL surface : EGLSurface
+ Aspect_Display myDisplay; //!< EGL connection to the Display : EGLDisplay
+ Aspect_RenderingContext myGContext; //!< EGL rendering context : EGLContext
+#elif defined(_WIN32)
Aspect_Handle myWindow; //!< window handle (owner of GL context) : HWND
Aspect_Handle myWindowDC; //!< Device Descriptor handle : HDC
Aspect_RenderingContext myGContext; //!< Rendering Context handle : HGLRC
+#elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
+ void* myGContext; //!< Rendering Context handle : NSOpenGLContext
#else
Aspect_Drawable myWindow; //!< window handle (owner of GL context) : GLXDrawable
Aspect_Display myDisplay; //!< connection to the X-server : Display*
Aspect_RenderingContext myGContext; //!< X-GLX rendering context : GLXContext
#endif
- void* myGlLibHandle; //!< optional handle to GL library
- OpenGl_GlCore20* myGlCore20; //!< common structure for GL core functions upto 2.0
- Standard_Integer myGlVerMajor; //!< cached GL version major number
- Standard_Integer myGlVerMinor; //!< cached GL version minor number
- Standard_Boolean myIsFeedback; //!< flag indicates GL_FEEDBACK mode
- Standard_Boolean myIsInitialized; //!< flag indicates initialization state
+private: // context info
+
+ typedef NCollection_DataMap<TCollection_AsciiString, Standard_Integer> OpenGl_DelayReleaseMap;
+ typedef NCollection_Handle<OpenGl_DelayReleaseMap> Handle(OpenGl_DelayReleaseMap);
+ typedef NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)> OpenGl_ResourcesMap;
+ typedef NCollection_Handle<OpenGl_ResourcesMap> Handle(OpenGl_ResourcesMap);
+ typedef NCollection_List<Handle(OpenGl_Resource)> OpenGl_ResourcesStack;
+ typedef NCollection_Handle<OpenGl_ResourcesStack> Handle(OpenGl_ResourcesStack);
+
+ Handle(OpenGl_ResourcesMap) mySharedResources; //!< shared resources with unique identification key
+ Handle(OpenGl_DelayReleaseMap) myDelayed; //!< shared resources for delayed release
+ Handle(OpenGl_ResourcesStack) myUnusedResources; //!< stack of resources for delayed clean up
+
+ OpenGl_Clipping myClippingState; //!< state of clip planes
+
+ void* myGlLibHandle; //!< optional handle to GL library
+ NCollection_Handle<OpenGl_GlFunctions>
+ myFuncs; //!< mega structure for all GL functions
+ Standard_Integer myAnisoMax; //!< maximum level of anisotropy texture filter
+ Standard_Integer myTexClamp; //!< either GL_CLAMP_TO_EDGE (1.2+) or GL_CLAMP (1.1)
+ Standard_Integer myMaxTexDim; //!< value for GL_MAX_TEXTURE_SIZE
+ Standard_Integer myMaxClipPlanes; //!< value for GL_MAX_CLIP_PLANES
+ Standard_Integer myGlVerMajor; //!< cached GL version major number
+ Standard_Integer myGlVerMinor; //!< cached GL version minor number
+ Standard_Boolean myIsInitialized; //!< flag indicates initialization state
+ Standard_Boolean myIsStereoBuffers; //!< context supports stereo buffering
+ Standard_Boolean myIsGlNormalizeEnabled; //!< GL_NORMALIZE flag
+ //!< Used to tell OpenGl that normals should be normalized
+
+ Handle(OpenGl_ShaderManager) myShaderManager; //! support object for managing shader programs
+
+private: //! @name fields tracking current state
+
+ Handle(OpenGl_ShaderProgram) myActiveProgram; //!< currently active GLSL program
+ Handle(OpenGl_Sampler) myTexSampler; //!< currently active sampler object
+ Standard_Integer myRenderMode; //!< value for active rendering mode
+ Standard_Integer myDrawBuffer; //!< current draw buffer
+
+private:
+
+ //! Copying allowed only within Handles
+ OpenGl_Context (const OpenGl_Context& );
+ OpenGl_Context& operator= (const OpenGl_Context& );
public:
DEFINE_STANDARD_RTTI(OpenGl_Context) // Type definition
+ friend class OpenGl_Window;
+
};
#endif // _OpenGl_Context_H__
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