0026791: Visualization, TKOpenGl - apply view resolution to built-in markers

Add ResolutionRatio() method in the Graphic3d_RenderingParams.
Add SetResolutionRatio() method in the OpenGl_Context.

src/Graphic3d/Graphic3d_RenderingParams.hxx

@@ -79,6 +79,12 @@ public:
     AnaglyphRight.SetRow (3, aZero);
   }
 
+  //! Returns resolution ratio.
+  Standard_ShortReal ResolutionRatio() const
+  {
+    return Resolution / static_cast<Standard_ShortReal> (THE_DEFAULT_RESOLUTION);
+  }
+
 public:
 
   Graphic3d_RenderingMode Method;                      //!< specifies rendering mode, Graphic3d_RM_RASTERIZATION by default

src/OpenGl/OpenGl_Context.cxx

@@ -140,7 +140,8 @@ OpenGl_Context::OpenGl_Context (const Handle(OpenGl_Caps)& theCaps)
   myReadBuffer (0),
   myDrawBuffer (0),
   myDefaultVao (0),
-  myIsGlDebugCtx (Standard_False)
+  myIsGlDebugCtx (Standard_False),
+  myResolutionRatio (1.0f)
 {
   // system-dependent fields
 #if defined(HAVE_EGL)
@@ -2672,7 +2673,7 @@ void OpenGl_Context::SetPointSize (const Standard_ShortReal theSize)
 {
   if (!myActiveProgram.IsNull())
   {
-    myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_POINT_SIZE), theSize);
+    myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_POINT_SIZE), theSize * myResolutionRatio);
   #if !defined(GL_ES_VERSION_2_0)
     //myContext->core11fwd->glEnable (GL_VERTEX_PROGRAM_POINT_SIZE);
   #endif
@@ -2680,7 +2681,7 @@ void OpenGl_Context::SetPointSize (const Standard_ShortReal theSize)
 #if !defined(GL_ES_VERSION_2_0)
   //else
   {
-    core11fwd->glPointSize (theSize);
+    core11fwd->glPointSize (theSize * myResolutionRatio);
     if (core20fwd != NULL)
     {
       //myContext->core11fwd->glDisable (GL_VERTEX_PROGRAM_POINT_SIZE);

src/OpenGl/OpenGl_Context.hxx

@@ -583,6 +583,13 @@ public: //! @name methods to alter or retrieve current state
 
   Standard_EXPORT void DisableFeatures() const;
 
+  //! Set resolution ratio.
+  //! Note that this method rounds @theRatio to nearest integer.
+  void SetResolutionRatio (const Standard_ShortReal theRatio)
+  {
+    myResolutionRatio = Max (1.0f, std::floor (theRatio + 0.5f));
+  }
+
 private:
 
   //! Wrapper to system function to retrieve GL function pointer by name.
@@ -705,6 +712,8 @@ private: //! @name fields tracking current state
   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)
+  Standard_ShortReal           myResolutionRatio; //!< scaling factor for parameters like text size
+                                                  //!< to be properly displayed on device (screen / printer)
 
 public:
 

src/OpenGl/OpenGl_View_Redraw.cxx

@@ -281,6 +281,9 @@ void OpenGl_View::Redraw()
   // fetch OpenGl context state
   aCtx->FetchState();
 
+  // set resolution ratio
+  aCtx->SetResolutionRatio (RenderingParams().ResolutionRatio());
+
   OpenGl_FrameBuffer* aFrameBuffer = (OpenGl_FrameBuffer* )myFBO;
   bool toSwap = aCtx->IsRender()
             && !aCtx->caps->buffersNoSwap

tests/bugs/vis/bug26791

@@ -0,0 +1,25 @@
+puts "============"
+puts "OCC26790 apply view resolution to built-in markers"
+puts "============"
+puts ""
+pload VISUALIZATION
+
+vclear
+vclose all
+
+vinit View1
+
+for { set aMarkerType 0 } { $aMarkerType < 13 } { incr aMarkerType } {
+  set aRow [expr $aMarkerType - 7]
+  set aCol 5
+  vmarkerstest m${aMarkerType} $aCol $aRow 0 MarkerType=$aMarkerType PointsOnSide=1
+}
+
+vright
+vfit
+
+vdump $imagedir/${casename}_1.png
+
+vrenderparams -resolution 144
+
+vdump $imagedir/${casename}_2.png