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0024739: TKOpenGl - port ray-tracing from OpenCL to GLSL for better integration and portability
RayTracing - disable reflections by default Fix possible compilation issue on Mac OS X.
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dbp
apn
@@ -16,12 +16,8 @@
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#ifndef _OpenGl_Workspace_Header
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#define _OpenGl_Workspace_Header
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#ifdef HAVE_OPENCL
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#include <map>
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#include <set>
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#include <OpenGl_Cl.hxx>
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#endif
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#include <map>
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#include <set>
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#include <Handle_OpenGl_Workspace.hxx>
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#include <OpenGl_Window.hxx>
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@@ -46,12 +42,11 @@
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#include <OpenGl_AspectFace.hxx>
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#include <OpenGl_Display.hxx>
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#include <OpenGl_FrameBuffer.hxx>
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#include <OpenGl_Matrix.hxx>
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#include <OpenGl_NamedStatus.hxx>
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#include <OpenGl_PrinterContext.hxx>
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#ifdef HAVE_OPENCL
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#include <OpenGl_SceneGeometry.hxx>
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#endif
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#include <OpenGl_SceneGeometry.hxx>
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#include <OpenGl_TextParam.hxx>
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#include <OpenGl_RenderFilter.hxx>
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#include <OpenGl_Vec.hxx>
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@@ -59,6 +54,10 @@
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#include <Handle_OpenGl_View.hxx>
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#include <Handle_OpenGl_Texture.hxx>
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#include <OpenGl_ShaderObject.hxx>
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#include <OpenGl_ShaderProgram.hxx>
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#include <OpenGl_TextureBufferArb.hxx>
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class OpenGl_AspectLine;
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class OpenGl_AspectMarker;
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class OpenGl_AspectText;
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@@ -233,24 +232,119 @@ protected:
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void setTextureParams (Handle(OpenGl_Texture)& theTexture,
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const Handle(Graphic3d_TextureParams)& theParams);
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#ifdef HAVE_OPENCL
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public:
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//! Returns information about OpenCL device used for computations.
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Standard_Boolean GetOpenClDeviceInfo (
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NCollection_DataMap<TCollection_AsciiString, TCollection_AsciiString>& theInfo) const;
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protected:
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//! Describes result of OpenCL initializing.
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enum OpenClInitStatus
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//! Result of OpenGL shaders initialization.
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enum RaytraceInitStatus
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{
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OpenGl_CLIS_NONE,
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OpenGl_CLIS_INIT,
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OpenGl_CLIS_FAIL
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OpenGl_RT_NONE,
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OpenGl_RT_INIT,
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OpenGl_RT_FAIL
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};
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//! Defines frequently used shader variables.
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enum ShaderVariableIndex
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{
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OpenGl_RT_aPosition,
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OpenGl_RT_uOriginLT,
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OpenGl_RT_uOriginLB,
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OpenGl_RT_uOriginRT,
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OpenGl_RT_uOriginRB,
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OpenGl_RT_uDirectLT,
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OpenGl_RT_uDirectLB,
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OpenGl_RT_uDirectRT,
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OpenGl_RT_uDirectRB,
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OpenGl_RT_uSceneRad,
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OpenGl_RT_uSceneEps,
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OpenGl_RT_uLightAmbnt,
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OpenGl_RT_uLightCount,
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OpenGl_RT_uShadEnabled,
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OpenGl_RT_uReflEnabled,
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OpenGl_RT_uInputTexture,
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OpenGl_RT_uOffsetX,
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OpenGl_RT_uOffsetY,
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OpenGl_RT_uSamples,
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OpenGl_RT_NbVariables // special field
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};
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//! Defines texture samplers.
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enum ShaderSamplerNames
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{
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OpenGl_RT_SceneNodeInfoTexture = 0,
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OpenGl_RT_SceneMinPointTexture = 1,
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OpenGl_RT_SceneMaxPointTexture = 2,
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OpenGl_RT_ObjectNodeInfoTexture = 3,
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OpenGl_RT_ObjectMinPointTexture = 4,
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OpenGl_RT_ObjectMaxPointTexture = 5,
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OpenGl_RT_GeometryVertexTexture = 6,
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OpenGl_RT_GeometryNormalTexture = 7,
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OpenGl_RT_GeometryTriangTexture = 8,
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OpenGl_RT_EnvironmentMapTexture = 9,
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OpenGl_RT_RaytraceMaterialTexture = 10,
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OpenGl_RT_RaytraceLightSrcTexture = 11,
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OpenGl_RT_FSAAInputTexture = 12
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};
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//! Tool class for management of shader sources.
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class ShaderSource
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{
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public:
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//! Creates new uninitialized shader source.
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ShaderSource()
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{
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//
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}
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//! Creates new shader source from specified file.
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ShaderSource (const TCollection_AsciiString& theFileName)
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{
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Load (&theFileName, 1);
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}
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public:
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//! Returns prefix to insert before the source.
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const TCollection_AsciiString& Prefix() const
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{
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return myPrefix;
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}
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//! Sets prefix to insert before the source.
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void SetPrefix (const TCollection_AsciiString& thePrefix)
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{
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myPrefix = thePrefix;
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}
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//! Returns shader source combined with prefix.
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TCollection_AsciiString Source() const;
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//! Loads shader source from specified files.
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void Load (const TCollection_AsciiString* theFileNames, const Standard_Integer theCount);
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private:
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TCollection_AsciiString mySource; //!< Source string of the shader object
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TCollection_AsciiString myPrefix; //!< Prefix to insert before the source
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};
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//! Default size of traversal stack.
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static const Standard_Integer THE_DEFAULT_STACK_SIZE = 24;
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protected: //! @name methods related to ray-tracing
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//! Updates 3D scene geometry for ray-tracing.
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@@ -301,47 +395,53 @@ protected: //! @name methods related to ray-tracing
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Standard_Boolean AddRaytracePolygonArray (OpenGl_TriangleSet* theSet,
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const CALL_DEF_PARRAY* theArray, Standard_Integer theOffset, Standard_Integer theCount, Standard_Integer theMatID);
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//! Initializes OpenCL resources.
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Standard_Boolean InitOpenCL();
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//! Loads and compiles shader object from specified source.
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Handle(OpenGl_ShaderObject) LoadShader (const ShaderSource& theSource, GLenum theType);
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//! Releases OpenCL resources.
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void ReleaseOpenCL();
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//! Performs safe exit when shaders initialization fails.
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Standard_Boolean SafeFailBack (const TCollection_ExtendedString& theMessage);
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//! Resizes OpenCL output image.
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Standard_Boolean ResizeRaytraceOutputBuffer (const cl_int theSizeX, const cl_int theSizeY);
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//! Initializes OpenGL/GLSL shader programs.
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Standard_Boolean InitRaytraceResources();
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//! Writes scene geometry to OpenCl device.
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Standard_Boolean WriteRaytraceSceneToDevice();
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//! Releases OpenGL/GLSL shader programs.
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void ReleaseRaytraceResources();
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//! Runs OpenCL ray-tracing kernels.
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Standard_Boolean RunRaytraceOpenCLKernelsOld (const Graphic3d_CView& theCView,
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const GLfloat theOrigins[16],
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const GLfloat theDirects[16],
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const int theSizeX,
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const int theSizeY);
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//! Uploads ray-trace data to the GPU.
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Standard_Boolean UploadRaytraceData();
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//! Launches OpenCL ray-tracing kernels.
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Standard_Boolean RunRaytraceOpenCLKernels (const Graphic3d_CView& theCView,
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const Standard_ShortReal theOrigins[16],
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const Standard_ShortReal theDirects[16],
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const Standard_Integer theSizeX,
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const Standard_Integer theSizeY);
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//! Resizes OpenGL frame buffers.
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Standard_Boolean ResizeRaytraceBuffers (const Standard_Integer theSizeX,
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const Standard_Integer theSizeY);
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//! Redraws the window using OpenCL ray tracing.
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//! Generates viewing rays for corners of screen quad.
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void UpdateCamera (const NCollection_Mat4<GLdouble>& theOrientation,
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const NCollection_Mat4<GLdouble>& theViewMapping,
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OpenGl_Vec3 theOrigins[4],
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OpenGl_Vec3 theDirects[4]);
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//! Runs ray-tracing shader programs.
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Standard_Boolean RunRaytraceShaders (const Graphic3d_CView& theCView,
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const Standard_Integer theSizeX,
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const Standard_Integer theSizeY,
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const OpenGl_Vec3 theOrigins[4],
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const OpenGl_Vec3 theDirects[4],
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OpenGl_FrameBuffer* theFrameBuffer);
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//! Redraws the window using OpenGL/GLSL ray-tracing.
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Standard_Boolean Raytrace (const Graphic3d_CView& theCView,
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const int theSizeX, const int theSizeY, const Tint theToSwap);
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const Standard_Integer theSizeX,
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const Standard_Integer theSizeY,
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const Standard_Boolean theToSwap,
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OpenGl_FrameBuffer* theFrameBuffer);
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protected: //! @name fields related to ray-tracing
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//! Result of OpenCL initialization.
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OpenClInitStatus myComputeInitStatus;
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//! Is ATI/AMD OpenCL platform used?
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Standard_Boolean myIsAmdComputePlatform;
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//! Result of shaders initialization.
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RaytraceInitStatus myComputeInitStatus;
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//! Is geometry data valid?
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Standard_Boolean myIsRaytraceDataValid;
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//! Is geometry data musty be updated?
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Standard_Boolean myToUpdateRaytraceData;
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//! 3D scene geometry data for ray-tracing.
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OpenGl_RaytraceGeometry myRaytraceGeometry;
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@@ -351,54 +451,57 @@ protected: //! @name fields related to ray-tracing
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//! Scene epsilon to prevent self-intersections.
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Standard_ShortReal myRaytraceSceneEpsilon;
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//! OpenCL context.
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cl_context myComputeContext;
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//! OpenCL command queue.
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cl_command_queue myComputeQueue;
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//! OpenCL computing program.
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cl_program myRaytraceProgram;
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//! OpenCL ray-tracing render kernel.
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cl_kernel myRaytraceRenderKernel;
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//! OpenCL adaptive anti-aliasing kernel.
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cl_kernel myRaytraceSmoothKernel;
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//! Actual size of traversal stack in shader program.
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Standard_Integer myTraversalStackSize;
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//! OpenCL image to store environment map.
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cl_mem myRaytraceEnvironment;
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//! OpenCL image to store rendering result.
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cl_mem myRaytraceOutputImage;
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//! OpenCL image to store anti-aliasing result.
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cl_mem myRaytraceOutputImageAA;
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//! OpenGL/GLSL source of ray-tracing fragment shader.
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ShaderSource myRaytraceShaderSource;
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//! OpenGL/GLSL source of adaptive-AA fragment shader.
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ShaderSource myPostFSAAShaderSource;
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//! OpenGL texture to store rendering result.
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Handle(OpenGl_Texture) myRaytraceOutputTexture;
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//! OpenGL texture to store anti-aliasing result.
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Handle(OpenGl_Texture) myRaytraceOutputTextureAA;
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//! OpenGL/GLSL ray-tracing fragment shader.
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Handle(OpenGl_ShaderObject) myRaytraceShader;
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//! OpenGL/GLSL adaptive-AA fragment shader.
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Handle(OpenGl_ShaderObject) myPostFSAAShader;
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//! OpenCL buffer of material properties.
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cl_mem myRaytraceMaterialBuffer;
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//! OpenCL buffer of light source properties.
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cl_mem myRaytraceLightSourceBuffer;
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//! OpenGL/GLSL ray-tracing shader program.
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Handle(OpenGl_ShaderProgram) myRaytraceProgram;
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//! OpenGL/GLSL adaptive-AA shader program.
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Handle(OpenGl_ShaderProgram) myPostFSAAProgram;
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//! OpenCL buffer of vertex coords.
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cl_mem myGeometryVertexBuffer;
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//! OpenCL buffer of vertex normals.
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cl_mem myGeometryNormalBuffer;
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//! OpenCL buffer of triangle indices.
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cl_mem myGeometryTriangBuffer;
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//! Texture buffer of data records of high-level BVH nodes.
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Handle(OpenGl_TextureBufferArb) mySceneNodeInfoTexture;
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//! Texture buffer of minimum points of high-level BVH nodes.
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Handle(OpenGl_TextureBufferArb) mySceneMinPointTexture;
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//! Texture buffer of maximum points of high-level BVH nodes.
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Handle(OpenGl_TextureBufferArb) mySceneMaxPointTexture;
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//! OpenCL buffer of data records of high-level BVH nodes.
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cl_mem mySceneNodeInfoBuffer;
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//! OpenCL buffer of minimum points of high-level BVH nodes.
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cl_mem mySceneMinPointBuffer;
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//! OpenCL buffer of maximum points of high-level BVH nodes.
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cl_mem mySceneMaxPointBuffer;
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//! Texture buffer of data records of bottom-level BVH nodes.
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Handle(OpenGl_TextureBufferArb) myObjectNodeInfoTexture;
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//! Texture buffer of minimum points of bottom-level BVH nodes.
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Handle(OpenGl_TextureBufferArb) myObjectMinPointTexture;
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//! Texture buffer of maximum points of bottom-level BVH nodes.
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Handle(OpenGl_TextureBufferArb) myObjectMaxPointTexture;
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//! OpenCL buffer of data records of bottom-level BVH nodes.
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cl_mem myObjectNodeInfoBuffer;
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//! OpenCL buffer of minimum points of bottom-level BVH nodes.
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cl_mem myObjectMinPointBuffer;
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//! OpenCL buffer of maximum points of bottom-level BVH nodes.
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cl_mem myObjectMaxPointBuffer;
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//! Texture buffer of vertex coords.
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Handle(OpenGl_TextureBufferArb) myGeometryVertexTexture;
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//! Texture buffer of vertex normals.
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Handle(OpenGl_TextureBufferArb) myGeometryNormalTexture;
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//! Texture buffer of triangle indices.
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Handle(OpenGl_TextureBufferArb) myGeometryTriangTexture;
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//! Texture buffer of material properties.
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Handle(OpenGl_TextureBufferArb) myRaytraceMaterialTexture;
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//! Texture buffer of light source properties.
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Handle(OpenGl_TextureBufferArb) myRaytraceLightSrcTexture;
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//! Vertex buffer (VBO) for drawing dummy quad.
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OpenGl_VertexBuffer myRaytraceScreenQuad;
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//! Framebuffer (FBO) to perform adaptive FSAA.
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Handle(OpenGl_FrameBuffer) myRaytraceFBO1;
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//! Framebuffer (FBO) to perform adaptive FSAA.
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Handle(OpenGl_FrameBuffer) myRaytraceFBO2;
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//! State of OpenGL view.
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Standard_Size myViewModificationStatus;
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@@ -408,7 +511,8 @@ protected: //! @name fields related to ray-tracing
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//! State of OpenGL structures reflected to ray-tracing.
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std::map<const OpenGl_Structure*, Standard_Size> myStructureStates;
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#endif // HAVE_OPENCL
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//! Cached locations of frequently used uniform variables.
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Standard_Integer myUniformLocations[2][OpenGl_RT_NbVariables];
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protected: //! @name protected fields
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