0029570: Visualization, Graphic3d_Aspect - merge Graphic3d_Group aspects

[occt.git] / src / OpenGl / OpenGl_AspectsTextureSet.cxx

diff --git a/src/OpenGl/OpenGl_AspectsTextureSet.cxx b/src/OpenGl/OpenGl_AspectsTextureSet.cxx
new file mode 100644 (file)
index 0000000..7c03faf
--- /dev/null
+++ b/src/OpenGl/OpenGl_AspectsTextureSet.cxx
@@ -0,0 +1,204 @@
+// Copyright (c) 2019 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// 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.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#include <OpenGl_AspectsTextureSet.hxx>
+
+#include <OpenGl_Context.hxx>
+#include <OpenGl_Sampler.hxx>
+#include <OpenGl_Texture.hxx>
+#include <OpenGl_TextureSet.hxx>
+
+#include <Graphic3d_TextureParams.hxx>
+
+#include <Image_PixMap.hxx>
+
+namespace
+{
+  static const TCollection_AsciiString THE_EMPTY_KEY;
+}
+
+// =======================================================================
+// function : Release
+// purpose  :
+// =======================================================================
+void OpenGl_AspectsTextureSet::Release (OpenGl_Context* theCtx)
+{
+  if (myTextures.IsNull())
+  {
+    return;
+  }
+
+  for (OpenGl_TextureSet::Iterator aTextureIter (myTextures); aTextureIter.More(); aTextureIter.Next())
+  {
+    Handle(OpenGl_Texture)& aTextureRes = aTextureIter.ChangeValue();
+    if (aTextureRes.IsNull())
+    {
+      continue;
+    }
+
+    if (theCtx != NULL)
+    {
+      if (aTextureRes->ResourceId().IsEmpty())
+      {
+        theCtx->DelayedRelease (aTextureRes);
+      }
+      else
+      {
+        const TCollection_AsciiString aName = aTextureRes->ResourceId();
+        aTextureRes.Nullify(); // we need nullify all handles before ReleaseResource() call
+        theCtx->ReleaseResource (aName, Standard_True);
+      }
+    }
+    aTextureRes.Nullify();
+  }
+  myIsTextureReady = Standard_False;
+}
+
+// =======================================================================
+// function : UpdateRediness
+// purpose  :
+// =======================================================================
+void OpenGl_AspectsTextureSet::UpdateRediness (const Handle(Graphic3d_TextureSet)& theTextures)
+{
+  const Standard_Integer aNbTexturesOld = !myTextures.IsNull()  ? myTextures->Size()  : 0;
+  const Standard_Integer aNbTexturesNew = !theTextures.IsNull() ? theTextures->Size() : 0;
+  if (aNbTexturesOld != aNbTexturesNew)
+  {
+    myIsTextureReady = Standard_False;
+    return;
+  }
+  if (aNbTexturesOld == 0)
+  {
+    return;
+  }
+
+  Graphic3d_TextureSet::Iterator aTextureIter (theTextures);
+  OpenGl_TextureSet::Iterator aResIter (myTextures);
+  for (; aResIter.More(); aResIter.Next(), aTextureIter.Next())
+  {
+    const Handle(OpenGl_Texture)&       aResource = aResIter.Value();
+    const Handle(Graphic3d_TextureMap)& aTexture  = aTextureIter.Value();
+    if (aTexture.IsNull() != aResource.IsNull())
+    {
+      myIsTextureReady = Standard_False;
+      return;
+    }
+    else if (aTexture.IsNull())
+    {
+      continue;
+    }
+
+    const TCollection_AsciiString& aTextureKey = aTexture->GetId();
+    if (aTextureKey.IsEmpty() || aResource->ResourceId() != aTextureKey)
+    {
+      myIsTextureReady = Standard_False;
+      return;
+    }
+    else if (aResource->Revision() != aTexture->Revision())
+    {
+      myIsTextureReady = Standard_False;
+      return;
+    }
+    else
+    {
+      // just invalidate texture parameters
+      aResource->Sampler()->SetParameters (aTexture->GetParams());
+    }
+  }
+}
+
+// =======================================================================
+// function : build
+// purpose  :
+// =======================================================================
+void OpenGl_AspectsTextureSet::build (const Handle(OpenGl_Context)& theCtx,
+                                      const Handle(Graphic3d_TextureSet)& theTextures)
+{
+  // release old texture resources
+  const Standard_Integer aNbTexturesOld = !myTextures.IsNull()  ? myTextures->Size()  : 0;
+  const Standard_Integer aNbTexturesNew = !theTextures.IsNull() ? theTextures->Size() : 0;
+  if (aNbTexturesOld != aNbTexturesNew)
+  {
+    Release (theCtx.get());
+    if (aNbTexturesNew > 0)
+    {
+      myTextures = new OpenGl_TextureSet (theTextures->Size());
+    }
+    else
+    {
+      myTextures.Nullify();
+    }
+  }
+  if (myTextures.IsNull())
+  {
+    return;
+  }
+
+  Graphic3d_TextureSet::Iterator aTextureIter (theTextures);
+  OpenGl_TextureSet::Iterator aResIter (myTextures);
+  for (; aResIter.More(); aResIter.Next(), aTextureIter.Next())
+  {
+    Handle(OpenGl_Texture)& aResource = aResIter.ChangeValue();
+    const Handle(Graphic3d_TextureMap)& aTexture = aTextureIter.Value();
+    if (!aResource.IsNull())
+    {
+      if (!aTexture.IsNull()
+       &&  aTexture->GetId()    == aResource->ResourceId()
+       &&  aTexture->Revision() != aResource->Revision())
+      {
+        if (Handle(Image_PixMap) anImage = aTexture->GetImage())
+        {
+          aResource->Sampler()->SetParameters (aTexture->GetParams());
+          aResource->Init (theCtx, *anImage.operator->(), aTexture->Type());
+          aResource->SetRevision (aTexture->Revision());
+          continue;
+        }
+      }
+
+      if (aResource->ResourceId().IsEmpty())
+      {
+        theCtx->DelayedRelease (aResource);
+        aResource.Nullify();
+      }
+      else
+      {
+        const TCollection_AsciiString aTextureKey = aResource->ResourceId();
+        aResource.Nullify(); // we need nullify all handles before ReleaseResource() call
+        theCtx->ReleaseResource (aTextureKey, Standard_True);
+      }
+    }
+
+    if (!aTexture.IsNull())
+    {
+      const TCollection_AsciiString& aTextureKeyNew = aTexture->GetId();
+      if (aTextureKeyNew.IsEmpty()
+      || !theCtx->GetResource<Handle(OpenGl_Texture)> (aTextureKeyNew, aResource))
+      {
+        aResource = new OpenGl_Texture (aTextureKeyNew, aTexture->GetParams());
+        if (Handle(Image_PixMap) anImage = aTexture->GetImage())
+        {
+          aResource->Init (theCtx, *anImage.operator->(), aTexture->Type());
+          aResource->SetRevision (aTexture->Revision());
+        }
+        if (!aTextureKeyNew.IsEmpty())
+        {
+          theCtx->ShareResource (aTextureKeyNew, aResource);
+        }
+      }
+      else
+      {
+        aResource->Sampler()->SetParameters (aTexture->GetParams());
+      }
+    }
+  }
+}