Merge branch '1930-shader-bug-rel' into 'release-7.0'

Ice OpenGL refactoring (release)

See merge request !612

CI/contributors_check.sh

@@ -38,8 +38,8 @@ git shortlog -es HEAD | cut -f 2- \
 curl -s ${GITLAB_PROJECT_URL}/raw/master/CI/contributors/known-contributors.txt \
     | sort -u > ${KNOWN_CONTRIBUTORS}
 
-diff ${KNOWN_CONTRIBUTORS} ${GIT_CONTRIBUTORS} > ${UNKNOWN_CONTRIBUTORS}
-if [ "$?" -ne "0" ] ; then
+diff ${KNOWN_CONTRIBUTORS} ${GIT_CONTRIBUTORS} | grep '^>' > ${UNKNOWN_CONTRIBUTORS}
+if [ -s "${UNKNOWN_CONTRIBUTORS}" ] ; then
     echo ""
     echo "WARNING: ***************************************************************"
     echo "WARNING: Unknown contributors found:"

Modules/Visualization/Ice/include/otbGlActor.h

@@ -24,13 +24,14 @@
 #include <itkObject.h>
 
 #include "otbViewSettings.h"
+#include "otbShader.h"
 #include "OTBIceExport.h"
 #include <string>
 
 namespace otb
 {
 
-class OTBIce_EXPORT GlActor 
+class OTBIce_EXPORT GlActor
   : public itk::Object
 {
 public:
@@ -42,7 +43,7 @@ public:
   itkSetObjectMacro(Settings,ViewSettings);
   itkGetObjectMacro(Settings,ViewSettings);
   itkGetConstObjectMacro(Settings,ViewSettings);
-  
+
   itkSetMacro(Visible,bool);
   itkGetMacro(Visible,bool);
   itkBooleanMacro(Visible);
@@ -58,6 +59,9 @@ public:
   itkGetMacro( Overlay, bool );
   itkBooleanMacro( Overlay );
 
+  itkGetObjectMacro( Shader, Shader );
+  itkSetObjectMacro( Shader, Shader );
+
   // Retrieve the full extent of the actor
   virtual void GetExtent(double & ulx, double & uly, double & lrx, double & lry) const = 0;
 
@@ -70,15 +74,20 @@ public:
   // Gl rendering of current state
   virtual void Render() = 0;
 
+  /** create the shader (no shader created by default) */
+  virtual void CreateShader();
+
 protected:
   GlActor();
 
   ~GlActor() override;
 
+  Shader::Pointer m_Shader;
+
 private:
   // prevent implementation
-  GlActor(const Self&);
-  void operator=(const Self&);
+  GlActor( const Self & ) = delete;
+  void operator=( const Self & ) = delete;
 
   ViewSettings::Pointer m_Settings;
 

Modules/Visualization/Ice/include/otbGlBufferObject.h

+/*
+ * Copyright (C) 2005-2019 Centre National d'Etudes Spatiales (CNES)
+ *
+ * This file is part of Orfeo Toolbox
+ *
+ *     https://www.orfeo-toolbox.org/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef otb_GlBufferObject_h
+#define otb_GlBufferObject_h
+
+#include "OTBIceExport.h"
+
+
+#include "otbGlHandle.h"
+#include "otbGlTypeTraits.h"
+
+
+namespace otb { namespace gl {
+
+
+/** OpenGL element-type of buffer-object.
+ */
+enum class element : GLenum
+{
+  vertex = GL_ARRAY_BUFFER,
+  index = GL_ELEMENT_ARRAY_BUFFER,
+};
+
+
+/**
+ */
+template< element E >
+struct BufferObjectPolicy
+{
+  static
+  void
+  Generate( Id_t & id )
+    {
+    glGenBuffers( 1, &id );
+    }
+
+  static
+  void
+  Bind( Id_t id )
+    {
+    glBindBuffer( static_cast< GLenum >( E ), id );
+    }
+
+  static
+  void
+  Release( Id_t & id )
+    {
+    glDeleteBuffers( 1, &id );
+    }
+};
+
+
+/**
+ * @class OpenGL object.
+ */
+template< element E >
+struct BufferObject
+{
+  /** Buffer identifier type. */
+  using Id_t = otb::gl::Id_t;
+
+  /** @return element type. */
+  static constexpr
+  element
+  Element() noexcept
+  {
+    return E;
+  }
+
+  /** Default constructor. */
+  BufferObject() = default;
+
+  /** Construct and fill. */
+  template< typename T >
+  BufferObject( std::initializer_list< T > data,
+		std::size_t components = 1 ) :
+    m_Id(),
+    m_Count( data.size() ),
+    m_Size( sizeof( T ) ),
+    m_Components( components ),
+    m_GlType( TypeTraits< T >::value() )
+  {
+    assert( data.size() );
+    assert( components );
+
+    glBufferData(
+      static_cast< GLenum >( E ),
+      data.size() * sizeof( T ),
+      data.begin(),
+      GL_STATIC_DRAW
+    );
+
+    CheckError();
+  }
+
+  ~BufferObject() = default;
+
+  BufferObject( BufferObject && ) = default;
+
+  BufferObject & operator = ( BufferObject && ) = default;
+
+  /** Cast operator. */
+  operator Id_t() const noexcept
+  {
+    return m_Id;
+  }
+
+  void
+  Bind( bool isEnabled = true ) const
+  {
+    m_Id.Bind( isEnabled );
+  }
+
+  GLenum
+  GlType() const noexcept
+  {
+    return m_GlType;
+  }
+
+  std::size_t
+  Size() const noexcept
+  {
+    return m_Size;
+  }
+
+  std::size_t
+  Stride( std::size_t components ) const noexcept
+  {
+    assert( m_Size>0 );
+    assert( m_Components>0 );
+
+    assert( components<=m_Components );
+
+    return m_Size * ( m_Components - components );
+  }
+
+private:
+  Handle< BufferObjectPolicy< E > > m_Id;
+  std::size_t m_Count = 0;
+  std::size_t m_Size = 0;
+  std::size_t m_Components = 0;
+  GLenum m_GlType = GL_ZERO;
+};
+
+
+using VertexBufferObject = BufferObject< element::vertex >;
+using IndexBufferObject = BufferObject< element::index >;
+
+
+} // end namespace gl.
+
+} // end namespace otb.
+
+
+#endif // otb_GlBufferObject_h

Modules/Visualization/Ice/include/otbGlError.h

+/*
+ * Copyright (C) 2005-2019 Centre National d'Etudes Spatiales (CNES)
+ *
+ * This file is part of Orfeo Toolbox
+ *
+ *     https://www.orfeo-toolbox.org/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef otb_GlError_h
+#define otb_GlError_h
+
+
+#include "OTBIceExport.h"
+
+#ifdef _WIN32
+#  include <windows.h>
+#endif
+
+#include <GL/glew.h>
+
+#include <cassert>
+#include <iostream>
+#include <stdexcept>
+
+
+namespace otb { namespace gl {
+
+/**
+ * @class OpenGL-specific exception.
+ */
+struct OTBIce_EXPORT Error : public std::runtime_error
+{
+  /** Construct an OpenGL exception related to the OpenGL error code.
+   */
+  Error( GLenum code );
+
+}; // End class GlError
+
+enum class error : int
+{
+  clear = 0,
+  trace,
+  assertion,
+  exception,
+};
+
+
+template< error E = error::exception >
+GLenum
+CheckError()
+{
+  GLenum glError = glGetError();
+
+  if( E>=error::trace )
+    if( glError!=GL_NO_ERROR )
+      std::cerr
+	<< "OPenGL error #" << glError << ": '" << gluErrorString( glError ) << "'"
+	<< std::endl;
+
+  if( E>=error::assertion )
+    assert( glError==GL_NO_ERROR );
+
+  // When assert is removed (NDEBUG) and Throw is false, this function
+  // body is emtpy and the C++ compiler should optimize the call by
+  // removing it.
+  //
+  // N.B.: equivalent of a scoped (and breakpoint-friendly) macro.
+
+  // Condition is splitted because first is determined at compile time
+  // and may be removed (see above) and second is determined at
+  // runtime.
+  if( E>=error::exception )
+    if( glError!=GL_NO_ERROR )
+      throw Error( glError );
+
+  return glError;
+}
+
+} // End of namespace gl.
+
+} // End namespace otb.
+
+
+#endif // otb_GlError_h

Modules/Visualization/Ice/include/otbGlHandle.h

+/*
+ * Copyright (C) 2005-2019 Centre National d'Etudes Spatiales (CNES)
+ *
+ * This file is part of Orfeo Toolbox
+ *
+ *     https://www.orfeo-toolbox.org/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef otb_GlHandle_h
+#define otb_GlHandle_h
+
+#include "OTBIceExport.h"
+
+
+#ifdef _WIN32
+#  include <windows.h>
+#endif
+
+#include <GL/glew.h>
+#include "otbGlError.h"
+
+#include <cassert>
+#include <utility>
+
+
+namespace otb { namespace gl {
+
+using Id_t = GLuint;
+
+/**
+ * @class OpenGL handle.
+ */
+template< typename Policy >
+class OTBIce_EXPORT Handle
+{
+  using Policy_t = Policy;
+
+public:
+  /** OpenGL handle identifier type */
+  using Id_t = otb::gl::Id_t;
+
+  /** Default constructor */
+  Handle()
+  {
+    Policy::Generate( m_Id );
+    assert( m_Id );
+
+    CheckError();
+
+    Policy::Bind( m_Id );
+
+    CheckError();
+  }
+
+  /** Destructor */
+  ~Handle()
+  {
+    Release();
+  }
+
+  /** Copy constructor (disabled). */
+  Handle( Handle const & ) = delete;
+
+  /** Assignement operator (disabled). */
+  Handle & operator = ( Handle const & ) = delete;
+
+  /** Move constructor. */
+  Handle( Handle && rhs ) noexcept :
+    m_Id( std::exchange( rhs.m_Id, 0 ) ) {}
+
+  /** Move assignment operator. */
+  Handle &
+    operator = ( Handle && rhs )
+    {
+      Release();
+
+      m_Id = std::exchange( rhs.m_Id, GL_ZERO );
+
+      return *this;
+    }
+
+  /** Cast operator. */
+  operator Id_t() const noexcept
+  {
+    return m_Id;
+  }
+
+  /** OpenGL handle binding */
+  void
+    Bind( bool isEnabled = true ) const
+  {
+    assert( m_Id );
+
+    Policy::Bind( isEnabled ? m_Id : GL_ZERO );
+
+    CheckError();
+  }
+
+protected:
+  /** OpenGL handle identifier (handler) */
+  Id_t m_Id = GL_ZERO;
+
+private:
+  void
+  Release()
+  {
+    CheckError< error::clear >();
+
+    Policy::Release( m_Id );
+
+    m_Id = GL_ZERO;
+
+    CheckError();
+  }
+};
+
+
+} // end namespace gl.
+
+} // end namespace otb.
+
+
+#endif // otb_GlHandle_h

Modules/Visualization/Ice/include/otbGlImageActor.h

@@ -26,7 +26,6 @@
 
 #include "itkCenteredRigid2DTransform.h"
 
-#include "otbFragmentShader.h"
 #include "otbGenericRSTransform.h"
 #include "otbGeoInterface.h"
 #include "otbGlActor.h"
@@ -35,13 +34,20 @@
 #include "otbMultiChannelExtractROI.h"
 #include "otbVectorRescaleIntensityImageFilter.h"
 #include "otbVectorImage.h"
+
 #include <string>
 
 
 namespace otb
 {
 
-class OTBIce_EXPORT GlImageActor 
+namespace gl
+{
+struct Mesh;
+}
+
+
+class OTBIce_EXPORT GlImageActor
   : public GlActor, public GeoInterface
 {
 public:
@@ -63,7 +69,7 @@ public:
   typedef VectorImageType::SpacingType                    SpacingType;
   typedef VectorImageType::PointType                      PointType;
   typedef VectorRescaleIntensityImageFilter<VectorImageType,UCharVectorImageType> RescaleFilterType;
-  
+
   struct ResolutionAlgorithm
   {
     enum type
@@ -76,7 +82,7 @@ public:
                     ///performances, better quality)
       MAX__};
     };
-  
+
   // Initialize with a new image
   void Initialize(const std::string & filename);
 
@@ -125,11 +131,7 @@ public:
   itkSetMacro(TileSize,unsigned int);
   itkGetMacro(TileSize,unsigned int);
 
-  itkBooleanMacro(SoftwareRendering );
-  itkSetMacro(SoftwareRendering, bool );
-  itkGetMacro(SoftwareRendering, bool );
-
-  void CreateShader();
+  void CreateShader() override;
 
   void SetResolutionAlgorithm(ResolutionAlgorithm::type alg)
   {
@@ -144,7 +146,7 @@ public:
   virtual void SetRedIdx(const unsigned int idx)
   {
   if ( this->m_RedIdx != idx )
-   { 
+   {
    this->m_RedIdx = std::min(this->GetNumberOfComponents(),idx);
    this->Modified();
    }
@@ -153,25 +155,25 @@ public:
   virtual void SetGreenIdx(const unsigned int idx)
   {
   if ( this->m_GreenIdx != idx )
-    { 
+    {
     this->m_GreenIdx = std::min(this->GetNumberOfComponents(),idx);
     this->Modified();
     }
-  }  
+  }
 
   virtual void SetBlueIdx(const unsigned int idx)
   {
   if ( this->m_BlueIdx != idx )
-    { 
+    {
     this->m_BlueIdx = std::min(this->GetNumberOfComponents(),idx);
-    this->Modified(); 
+    this->Modified();
     }
   }
 
   PointType ViewportToImageTransform(const PointType & in, bool physical = true) const;
 
   PointType ImageToViewportTransform(const PointType & in, bool physical = true) const;
-  
+
   bool GetPixelFromViewport( const PointType & in, PixelType & pixel ) const;
 
   bool GetPixelFromViewport( const PointType & view,
@@ -181,9 +183,6 @@ public:
 
   bool GetPixel( const PointType & physical, PixelType & pixel, IndexType & index ) const;
 
-  itkGetObjectMacro(Shader,FragmentShader);
-  itkSetObjectMacro(Shader,FragmentShader);
-
   itkGetObjectMacro( ImageSettings, ImageSettings );
 
   //
@@ -203,7 +202,7 @@ public:
 
 protected:
   GlImageActor();
-  
+
   ~GlImageActor() override;
 
   typedef ImageFileReader<VectorImageType>                                        ReaderType;
@@ -216,33 +215,23 @@ protected:
   class Tile
   {
   public:
-    Tile()
-      : m_Loaded(false),
-        m_TextureId(0),
-        m_ImageRegion(),
-        m_TileSize(0),
-        m_Image(),