#include <Aspect_Display.hxx>
#include <Aspect_RenderingContext.hxx>
#include <Handle_OpenGl_Context.hxx>
+#include <Handle_OpenGl_FrameBuffer.hxx>
+#include <Handle_OpenGl_Sampler.hxx>
#include <Handle_OpenGl_ShaderManager.hxx>
#include <Handle_OpenGl_ShaderProgram.hxx>
#include <NCollection_DataMap.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 <TColStd_PackedMapOfInteger.hxx>
#include <OpenGl_Clipping.hxx>
#include <OpenGl_GlCore11.hxx>
+#include <OpenGl_Utils.hxx>
//! Forward declarations
+#if defined(__APPLE__)
+ #import <TargetConditionals.h>
+ #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
+ #ifdef __OBJC__
+ @class EAGLContext;
+ #else
+ struct EAGLContext;
+ #endif
+ #else
+ #ifdef __OBJC__
+ @class NSOpenGLContext;
+ #else
+ struct NSOpenGLContext;
+ #endif
+ #endif
+#endif
+
struct OpenGl_GlFunctions;
struct OpenGl_ArbTBO;
struct OpenGl_ArbIns;
struct OpenGl_ArbDbg;
struct OpenGl_ArbFBO;
+struct OpenGl_ArbFBOBlit;
struct OpenGl_ExtGS;
+struct OpenGl_ArbTexBindless;
template<typename theBaseClass_t> struct OpenGl_TmplCore12;
typedef OpenGl_TmplCore12<OpenGl_GlCore11> OpenGl_GlCore12;
//! This class generalize access to the GL context and available extensions.
//!
-//! Functions are grouped into structures and accessed as fields.
-//! You should check the group for NULL before usage (if group is not NULL
-//! then all functions are available):
+//! Functions related to specific OpenGL version or extension are grouped into structures which can be accessed as fields of this class.
+//! The most simple way to check that required functionality is available - is NULL check for the group:
//! @code
//! if (myContext->core20 != NULL)
//! {
//! }
//! @endcode
//!
-//! Current implementation provide access to OpenGL core functionality up to 2.0 version
-//! (core12, core13, core14, core15, fields core20).
-//! within several extensions (arbTBO, arbFBO, etc.).
+//! Current implementation provide access to OpenGL core functionality up to 4.4 version (core12, core13, core14, core15, fields core20)
+//! as well as several extensions (arbTBO, arbFBO, etc.).
+//!
+//! OpenGL context might be initialized in Core Profile. In this case deprecated functionality become unavailable.
+//! To make code easily adaptable to wide range of OpenGL versions, function sets related to each version has two kinds of suffixes:
+//! - "back" for version 3.2+.
+//! Represents function set for Backward-Compatible Profile.
+//! Function sets without this suffix represents core profile.
+//! - "fwd" for version 3.0-.
+//! Represents non-deprecated function set of earlier OpenGL versions, which are still available within OpenGL 3.2 Core Profile.
+//! Function sets without this suffix represents complete list of functions related to specific OpenGL version.
+//!
+//! To select which core** function set should be used in specific case:
+//! - Determine the minimal OpenGL version required for implemented functionality and use it to access all functions.
+//! For example, if algorithm requires OpenGL 2.1+, it is better to write core20fwd->glEnable() rather than core11fwd->glEnable() for uniformity.
+//! - If functionality will work within Core Profile, use function sets with appropriate suffix.
+//! - Validate minimal requirements at initialization/creation time and omit checks within code where algorithm should be already initialized.
+//! Properly escape code incompatible with Core Profile. The simplest way to check Core Profile is "if (core11 == NULL)".
//!
//! Simplified extensions classification:
//! - prefixed with NV, AMD, ATI are vendor-specific (however may be provided by other vendors in some cases);
//! In this case developer should be careful because different specification may differ
//! in aspects (like enumeration values and error-handling).
//!
-//! Notice that some systems provide mechanisms to simultaneously incorporate with GL contexts
-//! with different capabilities. Thats why OpenGl_Context should be initialized and used
-//! for each GL context individually.
+//! Notice that some systems provide mechanisms to simultaneously incorporate with GL contexts with different capabilities.
+//! For this reason OpenGl_Context should be initialized and used for each GL context independently.
class OpenGl_Context : public Standard_Transient
{
public:
//! Destructor.
Standard_EXPORT virtual ~OpenGl_Context();
+ //! 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();
+ Standard_EXPORT Standard_Boolean Init (const Standard_Boolean theIsCoreProfile = Standard_False);
//! @return true if this context is valid (has been initialized)
inline Standard_Boolean IsValid() const
//! @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);
+ const Aspect_RenderingContext theEglContext,
+ const Standard_Boolean theIsCoreProfile = Standard_False);
#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);
+ const Aspect_RenderingContext theGContext,
+ const Standard_Boolean theIsCoreProfile = Standard_False);
//! @return the window handle (HWND) currently bound to this OpenGL context
inline Aspect_Handle Window() const
}
#elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
+ #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
+
+ //! Initialize class from specified OpenGL ES context (EAGLContext). Method should be called only once.
+ Standard_EXPORT Standard_Boolean Init (EAGLContext* theGContext,
+ const Standard_Boolean theIsCoreProfile = Standard_False);
+ #else
+
//! Initialize class from specified OpenGL context (NSOpenGLContext). Method should be called only once.
- Standard_EXPORT Standard_Boolean Init (const void* theGContext);
+ Standard_EXPORT Standard_Boolean Init (NSOpenGLContext* theGContext,
+ const Standard_Boolean theIsCoreProfile = Standard_False);
+ #endif
#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);
+ const Aspect_RenderingContext theGContext,
+ const Standard_Boolean theIsCoreProfile = Standard_False);
//! @return the window handle (GLXDrawable) currently bound to this OpenGL context
inline Aspect_Drawable Window() const
}
#endif
+ //! Read OpenGL version information from active context.
+ Standard_EXPORT static void ReadGlVersion (Standard_Integer& theGlVerMajor,
+ Standard_Integer& theGlVerMinor);
+
//! Check if theExtName extension is supported by active GL context.
Standard_EXPORT Standard_Boolean CheckExtension (const char* theExtName) const;
//! 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
}
//! 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:
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;
&& !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);
+
+ //! Applies matrix stored in ModelWorldState to OpenGl.
+ void ApplyModelWorldMatrix();
+
+ //! Applies matrix stored in WorldViewState to OpenGl.
+ void ApplyWorldViewMatrix();
+
+ //! Applies combination of matrices stored in ModelWorldState and WorldViewState to OpenGl.
+ void ApplyModelViewMatrix();
+
+ //! Applies matrix stored in ProjectionState to OpenGl.
+ void ApplyProjectionMatrix();
+
public:
//! @return messenger instance
const unsigned int theSeverity,
const TCollection_ExtendedString& theMessage);
+ //! Adds a filter for messages with theId and theSource (GL_DEBUG_SOURCE_)
+ Standard_EXPORT Standard_Boolean ExcludeMessage (const unsigned int theSource,
+ const unsigned int theId);
+ //! Removes a filter for messages with theId and theSource (GL_DEBUG_SOURCE_)
+ Standard_EXPORT Standard_Boolean IncludeMessage (const unsigned int theSource,
+ const unsigned int theId);
//! @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();
+ //! Return active read buffer.
+ Standard_Integer ReadBuffer() { return myReadBuffer; }
- //! 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 read buffer, wrapper for ::glReadBuffer().
+ Standard_EXPORT void SetReadBuffer (const Standard_Integer theReadBuffer);
- //! 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();
+ //! Return active draw buffer.
+ Standard_Integer DrawBuffer() { return myDrawBuffer; }
+
+ //! Switch draw buffer, wrapper for ::glDrawBuffer().
+ Standard_EXPORT void SetDrawBuffer (const Standard_Integer theDrawBuffer);
+
+ //! Switch read/draw buffers.
+ void SetReadDrawBuffer (const Standard_Integer theBuffer)
+ {
+ SetReadBuffer (theBuffer);
+ SetDrawBuffer (theBuffer);
+ }
//! Fetch OpenGl context state. This class tracks value of several OpenGl
//! state variables. Consulting the cached values is quicker than
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.
- Standard_EXPORT void BindProgram (const Handle(OpenGl_ShaderProgram)& theProgram);
+ //! @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);
+
+ //! Bind default Vertex Array Object
+ Standard_EXPORT void BindDefaultVao();
+
+ //! Default Frame Buffer Object.
+ const Handle(OpenGl_FrameBuffer)& DefaultFrameBuffer() const
+ {
+ return myDefaultFbo;
+ }
+
+ //! Setup new Default Frame Buffer Object and return previously set.
+ //! This call doesn't change Active FBO!
+ Standard_EXPORT Handle(OpenGl_FrameBuffer) SetDefaultFrameBuffer (const Handle(OpenGl_FrameBuffer)& theFbo);
+
+ //! Return debug context initialization state.
+ Standard_Boolean IsDebugContext() const
+ {
+ return myIsGlDebugCtx;
+ }
private:
//! Wrapper to system function to retrieve GL function pointer by name.
Standard_EXPORT void* findProc (const char* theFuncName);
- //! Read OpenGL version information from active context.
- Standard_EXPORT void readGlVersion();
+ //! Print error if not all functions have been exported by context for reported version.
+ //! Note that this will never happen when using GLX, since returned functions can not be validated.
+ //! @param theGlVerMajor the OpenGL major version with missing functions
+ //! @param theGlVerMinor the OpenGL minor version with missing functions
+ Standard_EXPORT void checkWrongVersion (const Standard_Integer theGlVerMajor,
+ const Standard_Integer theGlVerMinor);
//! Private initialization function that should be called only once.
- Standard_EXPORT void init();
+ Standard_EXPORT void init (const Standard_Boolean theIsCoreProfile);
public: //! @name core profiles
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
public: //! @name extensions
- Standard_Boolean arbNPTW; //!< GL_ARB_texture_non_power_of_two
- Standard_Boolean arbTexRG;//!< GL_ARB_texture_rg
- OpenGl_ArbTBO* arbTBO; //!< GL_ARB_texture_buffer_object
- 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
- 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
+ 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_ArbFBOBlit* arbFBOBlit; //!< glBlitFramebuffer function, moved out from OpenGl_ArbFBO structure for compatibility with OpenGL ES 2.0
+ 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
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
+ #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
+ EAGLContext* myGContext; //!< Rendering Context handle
+ #else
+ NSOpenGLContext* myGContext; //!< Rendering Context handle
+ #endif
#else
Aspect_Drawable myWindow; //!< window handle (owner of GL context) : GLXDrawable
Aspect_Display myDisplay; //!< connection to the X-server : Display*
OpenGl_Clipping myClippingState; //!< state of clip planes
- void* myGlLibHandle; //!< optional handle to GL library
+ 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 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
+ 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
+ Handle(OpenGl_FrameBuffer) myDefaultFbo; //!< default Frame Buffer Object
Standard_Integer myRenderMode; //!< value for active rendering mode
+ Standard_Integer myReadBuffer; //!< current read buffer
Standard_Integer myDrawBuffer; //!< current draw buffer
+ unsigned int myDefaultVao; //!< default Vertex Array Object
+ Standard_Boolean myIsGlDebugCtx; //!< debug context initialization state
+ TCollection_AsciiString myVendor; //!< Graphics Driver's vendor
+ TColStd_PackedMapOfInteger myFilters[6]; //!< messages suppressing filter (for sources from GL_DEBUG_SOURCE_API_ARB to GL_DEBUG_SOURCE_OTHER_ARB)
+
+public:
+
+ OpenGl_Utils::MatrixState<Standard_ShortReal> ModelWorldState; //!< state of orientation matrix
+ OpenGl_Utils::MatrixState<Standard_ShortReal> WorldViewState; //!< state of orientation matrix
+ OpenGl_Utils::MatrixState<Standard_ShortReal> ProjectionState; //!< state of projection matrix
private:
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