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2a33274558
Aspect_IS_HOLLOW now an alias to Aspect_IS_EMPTY and Aspect_IS_HIDDENLINE does not implicitly enables mesh edges, so that Graphic3d_AspectFillArea3d::SetDrawEdges() should be set independently. OpenGl_ShaderManager now provides built-in GLSL programs for drawing mesh edges in single pass (and on OpenGL ES which does not provide glPolygonMode()). Graphic3d_RenderingParams::ToEnableAlphaToCoverage is now enabled by default and properly handled at TKOpenGl level - enables coverage for Graphic3d_AlphaMode_Mask primitives. OpenGl_PrimitiveArray now uses GLSL programs instead of glPolygonMode() by default, which can be managed by OpenGl_Caps::usePolygonMode flag (desktop OpenGL only). glPolygonMode() is also used as fallback regardless OpenGl_Caps::usePolygonMode flag when GLSL programs are not supported (Geometry Shaders are required) or stipple line style is required (not implemented within Face GLSL). vaspects command has been extended by -setInterior -setDrawEdges -setEdgeColor -setEdgeType -setEdgeWidth arguments replacing vsetinteriorstyle/vsetedgetype/vunsetedgetype commands. vaspects now accepts arguments without "set" prefix. ViewerTest::ParseColor() now parses RGBA color. Redundant command BUC60738 has been removed. AIS_ColorScale - fixed usage of uninitialized FillArea aspects.
362 lines
12 KiB
C++
Executable File
362 lines
12 KiB
C++
Executable File
// Created on: 2013-09-19
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// Created by: Denis BOGOLEPOV
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// Copyright (c) 2013-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <Graphic3d_ShaderObject.hxx>
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#include <OpenGl_Context.hxx>
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#include <OpenGl_ShaderObject.hxx>
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#include <OSD_Path.hxx>
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#include <Standard_Assert.hxx>
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#include <TCollection_AsciiString.hxx>
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#include <TCollection_ExtendedString.hxx>
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#ifdef _WIN32
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#include <malloc.h> // for alloca()
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#endif
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IMPLEMENT_STANDARD_RTTIEXT(OpenGl_ShaderObject,OpenGl_Resource)
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//! Puts line numbers to the output of GLSL program source code.
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static TCollection_AsciiString putLineNumbers (const TCollection_AsciiString& theSource)
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{
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std::stringstream aStream;
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theSource.Print (aStream);
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std::string aLine;
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Standard_Integer aLineNumber = 1;
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TCollection_AsciiString aResultSource;
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while (std::getline (aStream, aLine))
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{
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TCollection_AsciiString anAsciiString = TCollection_AsciiString (aLine.c_str());
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anAsciiString.Prepend (TCollection_AsciiString ("\n") + TCollection_AsciiString (aLineNumber) + ": ");
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aResultSource += anAsciiString;
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aLineNumber++;
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}
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return aResultSource;
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}
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// =======================================================================
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// function : CreateFromSource
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// purpose :
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// =======================================================================
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Handle(Graphic3d_ShaderObject) OpenGl_ShaderObject::CreateFromSource (TCollection_AsciiString& theSource,
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Graphic3d_TypeOfShaderObject theType,
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const ShaderVariableList& theUniforms,
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const ShaderVariableList& theStageInOuts,
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const TCollection_AsciiString& theInName,
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const TCollection_AsciiString& theOutName,
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Standard_Integer theNbGeomInputVerts)
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{
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if (theSource.IsEmpty())
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{
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return Handle(Graphic3d_ShaderObject)();
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}
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TCollection_AsciiString aSrcUniforms, aSrcInOuts, aSrcInStructs, aSrcOutStructs;
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for (ShaderVariableList::Iterator anUniformIter (theUniforms); anUniformIter.More(); anUniformIter.Next())
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{
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const ShaderVariable& aVar = anUniformIter.Value();
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if ((aVar.Stages & theType) != 0)
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{
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aSrcUniforms += TCollection_AsciiString("\nuniform ") + aVar.Name + ";";
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}
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}
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for (ShaderVariableList::Iterator aVarListIter (theStageInOuts); aVarListIter.More(); aVarListIter.Next())
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{
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const ShaderVariable& aVar = aVarListIter.Value();
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Standard_Integer aStageLower = IntegerLast(), aStageUpper = IntegerFirst();
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Standard_Integer aNbStages = 0;
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for (Standard_Integer aStageIter = Graphic3d_TOS_VERTEX; aStageIter <= (Standard_Integer )Graphic3d_TOS_COMPUTE; aStageIter = aStageIter << 1)
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{
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if ((aVar.Stages & aStageIter) != 0)
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{
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++aNbStages;
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aStageLower = Min (aStageLower, aStageIter);
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aStageUpper = Max (aStageUpper, aStageIter);
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}
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}
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if ((Standard_Integer )theType < aStageLower
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|| (Standard_Integer )theType > aStageUpper)
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{
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continue;
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}
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const Standard_Boolean hasGeomStage = theNbGeomInputVerts > 0
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&& aStageLower < Graphic3d_TOS_GEOMETRY
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&& aStageUpper >= Graphic3d_TOS_GEOMETRY;
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const Standard_Boolean isAllStagesVar = aStageLower == Graphic3d_TOS_VERTEX
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&& aStageUpper == Graphic3d_TOS_FRAGMENT;
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if (hasGeomStage
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|| !theInName.IsEmpty()
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|| !theOutName.IsEmpty())
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{
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if (aSrcInStructs.IsEmpty()
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&& aSrcOutStructs.IsEmpty()
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&& isAllStagesVar)
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{
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if (theType == aStageLower)
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{
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aSrcOutStructs = "\nout VertexData\n{";
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}
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else if (theType == aStageUpper)
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{
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aSrcInStructs = "\nin VertexData\n{";
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}
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else // requires theInName/theOutName
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{
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aSrcInStructs = "\nin VertexData\n{";
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aSrcOutStructs = "\nout VertexData\n{";
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}
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}
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}
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if (isAllStagesVar
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&& (!aSrcInStructs.IsEmpty()
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|| !aSrcOutStructs.IsEmpty()))
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{
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if (!aSrcInStructs.IsEmpty())
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{
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aSrcInStructs += TCollection_AsciiString("\n ") + aVar.Name + ";";
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}
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if (!aSrcOutStructs.IsEmpty())
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{
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aSrcOutStructs += TCollection_AsciiString("\n ") + aVar.Name + ";";
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}
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}
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else
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{
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if (theType == aStageLower)
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{
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aSrcInOuts += TCollection_AsciiString("\nTHE_SHADER_OUT ") + aVar.Name + ";";
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}
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else if (theType == aStageUpper)
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{
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aSrcInOuts += TCollection_AsciiString("\nTHE_SHADER_IN ") + aVar.Name + ";";
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}
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}
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}
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if (theType == Graphic3d_TOS_GEOMETRY)
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{
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aSrcUniforms.Prepend (TCollection_AsciiString()
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+ "\nlayout (triangles) in;"
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"\nlayout (triangle_strip, max_vertices = " + theNbGeomInputVerts + ") out;");
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}
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if (!aSrcInStructs.IsEmpty()
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&& theType == Graphic3d_TOS_GEOMETRY)
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{
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aSrcInStructs += TCollection_AsciiString ("\n} ") + theInName + "[" + theNbGeomInputVerts + "];";
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}
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else if (!aSrcInStructs.IsEmpty())
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{
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aSrcInStructs += "\n}";
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if (!theInName.IsEmpty())
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{
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aSrcInStructs += " ";
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aSrcInStructs += theInName;
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}
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aSrcInStructs += ";";
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}
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if (!aSrcOutStructs.IsEmpty())
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{
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aSrcOutStructs += "\n}";
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if (!theOutName.IsEmpty())
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{
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aSrcOutStructs += " ";
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aSrcOutStructs += theOutName;
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}
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aSrcOutStructs += ";";
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}
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theSource.Prepend (aSrcUniforms + aSrcInStructs + aSrcOutStructs + aSrcInOuts);
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return Graphic3d_ShaderObject::CreateFromSource (theType, theSource);
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}
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// =======================================================================
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// function : OpenGl_ShaderObject
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// purpose : Creates uninitialized shader object
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// =======================================================================
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OpenGl_ShaderObject::OpenGl_ShaderObject (GLenum theType)
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: myType (theType),
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myShaderID (NO_SHADER)
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{
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//
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}
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// =======================================================================
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// function : ~OpenGl_ShaderObject
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// purpose : Releases resources of shader object
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// =======================================================================
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OpenGl_ShaderObject::~OpenGl_ShaderObject()
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{
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Release (NULL);
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}
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// =======================================================================
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// function : LoadAndCompile
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// purpose :
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// =======================================================================
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Standard_Boolean OpenGl_ShaderObject::LoadAndCompile (const Handle(OpenGl_Context)& theCtx,
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const TCollection_AsciiString& theSource,
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bool theIsVerbose,
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bool theToPrintSource)
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{
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if (!theIsVerbose)
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{
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return LoadSource (theCtx, theSource)
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&& Compile (theCtx);
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}
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if (!LoadSource (theCtx, theSource))
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{
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if (theToPrintSource)
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{
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theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, theSource);
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}
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theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, "Error! Failed to set shader source");
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Release (theCtx.operator->());
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return false;
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}
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if (!Compile (theCtx))
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{
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if (theToPrintSource)
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{
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theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, putLineNumbers (theSource));
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}
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TCollection_AsciiString aLog;
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FetchInfoLog (theCtx, aLog);
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if (aLog.IsEmpty())
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{
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aLog = "Compilation log is empty.";
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}
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theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
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TCollection_AsciiString ("Failed to compile shader object. Compilation log:\n") + aLog);
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Release (theCtx.operator->());
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return false;
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}
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else if (theCtx->caps->glslWarnings)
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{
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TCollection_AsciiString aLog;
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FetchInfoLog (theCtx, aLog);
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if (!aLog.IsEmpty()
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&& !aLog.IsEqual ("No errors.\n"))
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{
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theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_LOW,
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TCollection_AsciiString ("Shader compilation log:\n") + aLog);
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}
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}
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return true;
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}
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// =======================================================================
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// function : LoadSource
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// purpose : Loads shader source code
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// =======================================================================
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Standard_Boolean OpenGl_ShaderObject::LoadSource (const Handle(OpenGl_Context)& theCtx,
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const TCollection_AsciiString& theSource)
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{
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if (myShaderID == NO_SHADER)
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{
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return Standard_False;
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}
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const GLchar* aLines = theSource.ToCString();
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theCtx->core20fwd->glShaderSource (myShaderID, 1, &aLines, NULL);
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return Standard_True;
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}
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// =======================================================================
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// function : Compile
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// purpose : Compiles the shader object
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// =======================================================================
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Standard_Boolean OpenGl_ShaderObject::Compile (const Handle(OpenGl_Context)& theCtx)
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{
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if (myShaderID == NO_SHADER)
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{
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return Standard_False;
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}
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// Try to compile shader
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theCtx->core20fwd->glCompileShader (myShaderID);
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// Check compile status
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GLint aStatus = GL_FALSE;
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theCtx->core20fwd->glGetShaderiv (myShaderID, GL_COMPILE_STATUS, &aStatus);
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return aStatus != GL_FALSE;
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}
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// =======================================================================
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// function : FetchInfoLog
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// purpose : Fetches information log of the last compile operation
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// =======================================================================
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Standard_Boolean OpenGl_ShaderObject::FetchInfoLog (const Handle(OpenGl_Context)& theCtx,
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TCollection_AsciiString& theLog)
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{
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if (myShaderID == NO_SHADER)
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{
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return Standard_False;
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}
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// Load information log of the compiler
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GLint aLength = 0;
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theCtx->core20fwd->glGetShaderiv (myShaderID, GL_INFO_LOG_LENGTH, &aLength);
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if (aLength > 0)
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{
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GLchar* aLog = (GLchar*) alloca (aLength);
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memset (aLog, 0, aLength);
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theCtx->core20fwd->glGetShaderInfoLog (myShaderID, aLength, NULL, aLog);
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theLog = aLog;
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}
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return Standard_True;
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}
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// =======================================================================
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// function : Create
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// purpose : Creates new empty shader object of specified type
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// =======================================================================
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Standard_Boolean OpenGl_ShaderObject::Create (const Handle(OpenGl_Context)& theCtx)
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{
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if (myShaderID == NO_SHADER
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&& theCtx->core20fwd != NULL)
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{
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myShaderID = theCtx->core20fwd->glCreateShader (myType);
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}
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return myShaderID != NO_SHADER;
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}
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// =======================================================================
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// function : Release
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// purpose : Destroys shader object
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// =======================================================================
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void OpenGl_ShaderObject::Release (OpenGl_Context* theCtx)
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{
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if (myShaderID == NO_SHADER)
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{
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return;
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}
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Standard_ASSERT_RETURN (theCtx != NULL,
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"OpenGl_ShaderObject destroyed without GL context! Possible GPU memory leakage...",);
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if (theCtx->core20fwd != NULL
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&& theCtx->IsValid())
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{
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theCtx->core20fwd->glDeleteShader (myShaderID);
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}
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myShaderID = NO_SHADER;
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}
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