ENH: Consolidate ResliceMapper OpenGL code into SliceMapper.

The files vtkOpenGLImageResliceMapper was very similar to the file
vtkOpenGLImageSliceMapper.  After this change, the ResliceMapper
delegates to the SliceMapper to avoid code duplication.

Rendering/CMakeLists.txt

@@ -253,7 +253,6 @@ SET( KitOpenGL_SRCS
   vtkOpenGLGlyph3DMapper.cxx
   vtkOpenGLHardwareSupport.cxx
   vtkOpenGLImageMapper.cxx
-  vtkOpenGLImageResliceMapper.cxx
   vtkOpenGLImageSliceMapper.cxx
   vtkOpenGLLight.cxx
   vtkOpenGLLightingPainter.cxx
@@ -714,7 +713,6 @@ IF (VTK_USE_MANGLED_MESA)
                  vtkMesaCoincidentTopologyResolutionPainter.cxx
                  vtkMesaDisplayListPainter.cxx
                  vtkMesaImageMapper.cxx
-                 vtkMesaImageResliceMapper.cxx
                  vtkMesaImageSliceMapper.cxx
                  vtkMesaLight.cxx
                  vtkMesaLightingPainter.cxx

Rendering/vtkGraphicsFactory.cxx

@@ -27,7 +27,6 @@
 #include "vtkOpenGLCoincidentTopologyResolutionPainter.h"
 #include "vtkOpenGLDisplayListPainter.h"
 #include "vtkOpenGLGlyph3DMapper.h"
-#include "vtkOpenGLImageResliceMapper.h"
 #include "vtkOpenGLImageSliceMapper.h"
 #include "vtkOpenGLLight.h"
 #include "vtkOpenGLLightingPainter.h"
@@ -82,7 +81,6 @@
 #include "vtkMesaClipPlanesPainter.h"
 #include "vtkMesaCoincidentTopologyResolutionPainter.h"
 #include "vtkMesaDisplayListPainter.h"
-#include "vtkMesaImageResliceMapper.h"
 #include "vtkMesaImageSliceMapper.h"
 #include "vtkMesaLight.h"
 #include "vtkMesaLightingPainter.h"
@@ -304,16 +302,6 @@ vtkObject* vtkGraphicsFactory::CreateInstance(const char* vtkclassname )
 #endif
       return vtkOpenGLCamera::New();
       }
-    if(strcmp(vtkclassname, "vtkImageResliceMapper") == 0)
-      {
-#if defined(VTK_USE_MANGLED_MESA)
-      if ( vtkGraphicsFactory::UseMesaClasses )
-        {
-        return vtkMesaImageResliceMapper::New();
-        }
-#endif
-      return vtkOpenGLImageResliceMapper::New();
-      }
     if(strcmp(vtkclassname, "vtkImageSliceMapper") == 0)
       {
 #if defined(VTK_USE_MANGLED_MESA)

Rendering/vtkImageMapper3D.cxx

@@ -284,10 +284,6 @@ vtkMatrix4x4 *vtkImageMapper3D::GetDataToWorldMatrix()
       this->DataToWorldMatrix->DeepCopy(mat);
       }
     }
-  else
-    {
-    this->DataToWorldMatrix->Identity();
-    }
 
   return this->DataToWorldMatrix;
 }
@@ -295,7 +291,7 @@ vtkMatrix4x4 *vtkImageMapper3D::GetDataToWorldMatrix()
 //----------------------------------------------------------------------------
 // Subdivide the image until the pieces fit into texture memory
 void vtkImageMapper3D::RecursiveRenderTexturedPolygon(
-  vtkRenderer *ren, vtkProp3D *prop, vtkImageProperty *property,
+  vtkRenderer *ren, vtkImageProperty *property,
   vtkImageData *input, int extent[6], bool recursive)
 {
   int xdim, ydim;
@@ -311,7 +307,7 @@ void vtkImageMapper3D::RecursiveRenderTexturedPolygon(
     {
     // We can fit it - render
     this->RenderTexturedPolygon(
-      ren, prop, property, input, extent, recursive);
+      ren, property, input, extent, recursive);
     }
 
   // If the texture does not fit, then subdivide and render
@@ -341,19 +337,18 @@ void vtkImageMapper3D::RecursiveRenderTexturedPolygon(
     subExtent[idx*2] = extent[idx*2];
     subExtent[idx*2 + 1] = extent[idx*2] + tsize - 1;
     this->RecursiveRenderTexturedPolygon(
-      ren, prop, property, input, subExtent, true);
+      ren, property, input, subExtent, true);
 
     subExtent[idx*2] = subExtent[idx*2] + tsize;
     subExtent[idx*2 + 1] = extent[idx*2 + 1];
     this->RecursiveRenderTexturedPolygon(
-      ren, prop, property, input, subExtent, true);
+      ren, property, input, subExtent, true);
     }
 }
 
 //----------------------------------------------------------------------------
 void vtkImageMapper3D::RenderTexturedPolygon(
-  vtkRenderer *, vtkProp3D *, vtkImageProperty *,
-  vtkImageData *, int [6], bool)
+  vtkRenderer *, vtkImageProperty *, vtkImageData *, int [6], bool)
 {
   // implemented in subclasses
 }
@@ -965,9 +960,6 @@ unsigned char *vtkImageMapper3D::MakeTextureData(
   this->ComputeTextureSize(
     extent, xdim, ydim, imageSize, textureSize);
 
-  // will be set if the extent represents contiguous memory
-  bool contiguous = false;
-
   // number of components
   int numComp = input->GetNumberOfScalarComponents();
   int scalarType = input->GetScalarType();
@@ -1031,7 +1023,6 @@ unsigned char *vtkImageMapper3D::MakeTextureData(
          (xdim == 0 && ydim == 2 && dataExtent[2] == dataExtent[3] &&
           extent[0] == dataExtent[0] && extent[1] == dataExtent[1]) )
       {
-      contiguous = true;
       // if contiguous and correct data type, use data as-is
       if (inputIsColors && reuseData)
         {

Rendering/vtkImageMapper3D.h

@@ -31,6 +31,7 @@
 
 class vtkRenderer;
 class vtkProp3D;
+class vtkPoints;
 class vtkMatrix4x4;
 class vtkLookupTable;
 class vtkScalarsToColors;
@@ -175,7 +176,7 @@ protected:
   // Description:
   // Called by RecursiveRenderTexturedPolygon, overriden by subclasses.
   virtual void RenderTexturedPolygon(
-    vtkRenderer *ren, vtkProp3D *prop, vtkImageProperty *property,
+    vtkRenderer *ren, vtkImageProperty *property,
     vtkImageData *image, int extent[6], bool recursive);
 
   // Description:
@@ -183,7 +184,7 @@ protected:
   // as many times as necessary if the texture must be broken up into
   // pieces that are small enough for the GPU to render
   virtual void RecursiveRenderTexturedPolygon(
-    vtkRenderer *ren, vtkProp3D *prop, vtkImageProperty *property,
+    vtkRenderer *ren, vtkImageProperty *property,
     vtkImageData *image, int extent[6], bool recursive);
 
   // Description:

Rendering/vtkImageResliceMapper.cxx

@@ -14,6 +14,7 @@
 =========================================================================*/
 #include "vtkImageResliceMapper.h"
 
+#include "vtkImageSliceMapper.h"
 #include "vtkRenderer.h"
 #include "vtkCamera.h"
 #include "vtkImageSlice.h"
@@ -21,6 +22,7 @@
 #include "vtkImageProperty.h"
 #include "vtkLookupTable.h"
 #include "vtkMath.h"
+#include "vtkPoints.h"
 #include "vtkMatrix4x4.h"
 #include "vtkAbstractTransform.h"
 #include "vtkPlane.h"
@@ -29,23 +31,14 @@
 #include "vtkInformation.h"
 #include "vtkInformationVector.h"
 #include "vtkImageResliceToColors.h"
-#include "vtkGraphicsFactory.h"
+#include "vtkObjectFactory.h"
 
-//----------------------------------------------------------------------------
-// Needed when we don't use the vtkStandardNewMacro.
-vtkInstantiatorNewMacro(vtkImageResliceMapper);
-
-//----------------------------------------------------------------------------
-vtkImageResliceMapper* vtkImageResliceMapper::New()
-{
-  // First try to create the object from the vtkObjectFactory
-  vtkObject* ret = vtkGraphicsFactory::CreateInstance("vtkImageResliceMapper");
-  return static_cast<vtkImageResliceMapper *>(ret);
-}
+vtkStandardNewMacro(vtkImageResliceMapper);
 
 //----------------------------------------------------------------------------
 vtkImageResliceMapper::vtkImageResliceMapper()
 {
+  this->SliceMapper = vtkImageSliceMapper::New();
   this->ImageReslice = vtkImageResliceToColors::New();
   this->ResliceMatrix = vtkMatrix4x4::New();
   this->WorldToDataMatrix = vtkMatrix4x4::New();
@@ -59,6 +52,10 @@ vtkImageResliceMapper::vtkImageResliceMapper()
 //----------------------------------------------------------------------------
 vtkImageResliceMapper::~vtkImageResliceMapper()
 {
+  if (this->SliceMapper)
+    {
+    this->SliceMapper->Delete();
+    }
   if (this->ImageReslice)
     {
     this->ImageReslice->Delete();
@@ -102,9 +99,9 @@ void vtkImageResliceMapper::SetSlicePlane(vtkPlane *plane)
 }
 
 //----------------------------------------------------------------------------
-void vtkImageResliceMapper::ReleaseGraphicsResources(vtkWindow *)
+void vtkImageResliceMapper::ReleaseGraphicsResources(vtkWindow *win)
 {
-  // see OpenGL subclass for implementation
+  this->SliceMapper->ReleaseGraphicsResources(win);
 }
 
 //----------------------------------------------------------------------------
@@ -144,6 +141,36 @@ void vtkImageResliceMapper::Render(vtkRenderer *ren, vtkImageSlice *prop)
 
   // update anything related to the image coloring
   this->UpdateColorInformation(property);
+
+  // perform the reslicing
+  this->ImageReslice->SetInput(this->GetInput());
+  this->ImageReslice->UpdateWholeExtent();
+ 
+  // apply checkerboard pattern (should have timestamps)
+  if (property && property->GetCheckerboard())
+    {
+    this->CheckerboardImage(this->ImageReslice->GetOutput(),
+      ren->GetActiveCamera(), property);
+    }
+
+  // everything else is delegated
+  this->SliceMapper->SetInput(this->ImageReslice->GetOutput());
+  this->SliceMapper->GetDataToWorldMatrix()->DeepCopy(
+    this->SliceToWorldMatrix);
+  this->SliceMapper->SetSliceFacesCamera(this->SliceFacesCamera);
+  this->SliceMapper->SetExactPixelMatch(this->InternalResampleToScreenPixels);
+  this->SliceMapper->SetBorder( (this->Border ||
+                                 this->InternalResampleToScreenPixels) );
+  this->SliceMapper->SetPassColorData(true);
+  this->SliceMapper->SetDisplayExtent(this->ImageReslice->GetOutputExtent());
+
+  // render pass info for members of vtkImageStack
+  this->SliceMapper->MatteEnable = this->MatteEnable;
+  this->SliceMapper->ColorEnable = this->ColorEnable;
+  this->SliceMapper->DepthEnable = this->DepthEnable;
+
+  // let vtkImageSliceMapper do the rest of the work
+  this->SliceMapper->Render(ren, prop);
 }
 
 //----------------------------------------------------------------------------
@@ -591,24 +618,27 @@ void vtkImageResliceMapper::UpdateResliceInformation(vtkRenderer *ren)
     double ymin = VTK_DOUBLE_MAX;
     double ymax = -VTK_DOUBLE_MAX;
 
-    for (int k = 0; k < this->NCoords; k++)
+    vtkPoints *points = this->SliceMapper->GetPoints();
+    vtkIdType n = points->GetNumberOfPoints();
+    if (n == 0)
       {
-      if (this->Coords[3*k + 0] < xmin)
-        {
-        xmin = this->Coords[3*k + 0];
-        }
-      if (this->Coords[3*k + 0] > xmax)
-        {
-        xmax = this->Coords[3*k + 0];
-        }
-      if (this->Coords[3*k + 1] < ymin)
-        {
-        ymin = this->Coords[3*k + 1];
-        }
-      if (this->Coords[3*k + 1] > ymax)
-        {
-        ymax = this->Coords[3*k + 1];
-        }
+      double inputOrigin[3];
+      this->GetInput()->GetOrigin(inputOrigin);
+      xmin = inputOrigin[0];
+      xmax = inputOrigin[0];
+      ymin = inputOrigin[1];
+      ymax = inputOrigin[1];
+      }
+
+    for (vtkIdType k = 0; k < n; k++)
+      {
+      double point[3];
+      points->GetPoint(k, point);
+
+      xmin = ((xmin < point[0]) ? xmin : point[0]);
+      xmax = ((xmax > point[0]) ? xmax : point[0]);
+      ymin = ((ymin < point[1]) ? ymin : point[1]);
+      ymax = ((ymax > point[1]) ? ymax : point[1]);
       }
 
     double tol = 7.62939453125e-06;
@@ -911,8 +941,7 @@ void vtkImageResliceMapper::UpdatePolygonCoords(vtkRenderer *ren)
                   "6 points, please report a bug!");
     }
 
-  double *coords = this->Coords;
-  this->NCoords = n;
+  double coords[18];
 
   if (n > 0)
     {
@@ -947,36 +976,20 @@ void vtkImageResliceMapper::UpdatePolygonCoords(vtkRenderer *ren)
       coords[kk3+2] = z;
       }
     }
-}
-
-//----------------------------------------------------------------------------
-// Compute the texture coordinates for the cut polygon
-void vtkImageResliceMapper::ComputeTCoords(
-  vtkImageData *input, const int extent[6], int ncoords,
-  const double *coords, double *tcoords)
-{
-  // info about the texture, based on the provided extent
-  int xdim, ydim;
-  int imageSize[2];
-  int textureSize[2];
 
-  // compute image size and texture size from extent
-  this->ComputeTextureSize(
-    extent, xdim, ydim, imageSize, textureSize);
-
-  // now get the info about the image
-  double *spacing = input->GetSpacing();
-  double *origin = input->GetOrigin();
+  vtkPoints *points = this->SliceMapper->GetPoints();
+  if (!points)
+    {
+    points = vtkPoints::New();
+    points->SetDataTypeToDouble();
+    this->SliceMapper->SetPoints(points);
+    points->Delete();
+    }
 
-  // compute the texture coords
-  for (int k = 0; k < ncoords; k++)
+  points->SetNumberOfPoints(n);
+  for (int k = 0; k < n; k++)
     {
-    int k2 = k*2;
-    int k3 = k*3;
-    tcoords[k2]   = ((coords[k3]   - origin[0] + 0.5*spacing[0])/
-                     (textureSize[0]*spacing[0]));
-    tcoords[k2+1] = ((coords[k3+1] - origin[1] + 0.5*spacing[1])/
-                     (textureSize[1]*spacing[1]));
+    points->SetPoint(k, &coords[3*k]);
     }
 }
 
@@ -1063,4 +1076,5 @@ void vtkImageResliceMapper::ReportReferences(vtkGarbageCollector* collector)
   // These filters share our input and are therefore involved in a
   // reference loop.
   vtkGarbageCollectorReport(collector, this->ImageReslice, "ImageReslice");
+  vtkGarbageCollectorReport(collector, this->SliceMapper, "SliceMapper");
 }

Rendering/vtkImageResliceMapper.h

@@ -28,6 +28,7 @@
 
 #include "vtkImageMapper3D.h"
 
+class vtkImageSliceMapper;
 class vtkRenderer;
 class vtkCamera;
 class vtkLookupTable;
@@ -132,16 +133,12 @@ protected:
   // Make a polygon by cutting the data bounds with a plane.
   void UpdatePolygonCoords(vtkRenderer *ren);
 
-  // Description:
-  // Compute the texcoords for the image poly.
-  void ComputeTCoords(
-    vtkImageData *input, const int extent[6], int ncoords,
-    const double *coords, double *tcoords);
-
   // Description:
   // Garbage collection for reference loops.
   void ReportReferences(vtkGarbageCollector*);
 
+  vtkImageSliceMapper *SliceMapper;
+
   int AutoAdjustImageQuality; // LOD-style behavior
   int ResampleToScreenPixels; // Use software interpolation only
   int InternalResampleToScreenPixels; // Use software interpolation only
@@ -151,7 +148,6 @@ protected:
   vtkMatrix4x4 *SliceToWorldMatrix; // Slice to World transform matrix
 
   double Coords[18];
-  double TCoords[12];
   int NCoords;
  
 private:

Rendering/vtkImageSliceMapper.cxx

@@ -14,6 +14,7 @@
 =========================================================================*/
 #include "vtkImageSliceMapper.h"
 
+#include "vtkPoints.h"
 #include "vtkMath.h"
 #include "vtkMatrix4x4.h"
 #include "vtkPlane.h"
@@ -27,6 +28,8 @@
 #include "vtkInformationVector.h"
 #include "vtkStreamingDemandDrivenPipeline.h"
 
+vtkCxxSetObjectMacro(vtkImageSliceMapper, Points, vtkPoints);
+
 //----------------------------------------------------------------------------
 // Needed when we don't use the vtkStandardNewMacro.
 vtkInstantiatorNewMacro(vtkImageSliceMapper);
@@ -57,6 +60,10 @@ vtkImageSliceMapper::vtkImageSliceMapper()
   this->CroppingRegion[4] = 0;
   this->CroppingRegion[5] = 0;
 
+  this->Points = NULL;
+  this->ExactPixelMatch = false;
+  this->PassColorData = false;
+
   // streaming misbehaves if there is no output port
   this->SetNumberOfOutputPorts(1);
 }
@@ -64,6 +71,10 @@ vtkImageSliceMapper::vtkImageSliceMapper()
 //----------------------------------------------------------------------------
 vtkImageSliceMapper::~vtkImageSliceMapper()
 {
+  if (this->Points)
+    {
+    this->Points->Delete();
+    }
 }
 
 //----------------------------------------------------------------------------
@@ -228,6 +239,7 @@ void vtkImageSliceMapper::PrintSelf(ostream& os, vtkIndent indent)
      << this->CroppingRegion[0] << " " << this->CroppingRegion[1] << " "
      << this->CroppingRegion[2] << " " << this->CroppingRegion[3] << " "
      << this->CroppingRegion[4] << " " << this->CroppingRegion[5] << "\n";
+  os << indent << "Points: " << this->Points << "\n";
 }
 
 //----------------------------------------------------------------------------

Rendering/vtkImageSliceMapper.h

@@ -30,6 +30,7 @@
 #include "vtkImageMapper3D.h"
 
 class vtkCamera;
+class vtkPoints;
 
 class VTK_RENDERING_EXPORT vtkImageSliceMapper : public vtkImageMapper3D
 {
@@ -110,6 +111,35 @@ protected:
   vtkImageSliceMapper();
   ~vtkImageSliceMapper();
 
+  // Description:
+  // Set points that describe a polygon on which the slice will
+  // be rendered.
+  void SetPoints(vtkPoints *points);
+  vtkPoints *GetPoints() { return this->Points; }
+
+  // Description:
+  // Force linear interpolation.  Internal method, for when this
+  // mapper is used as a helper class.
+  void SetExactPixelMatch(int v) {
+    this->ExactPixelMatch = (v != 0); }
+
+  // Description:
+  // Pass color data.  Internal method, for when this mapper is
+  // used as a helper class.
+  void SetPassColorData(int v) {
+    this->PassColorData = (v != 0); }
+
+  // Description:
+  // Set the display extent.  Internal method, for when this mapper
+  // is used as a helper class.
+  void SetDisplayExtent(int extent[6]) {
+    this->DisplayExtent[0] = extent[0];
+    this->DisplayExtent[1] = extent[1];
+    this->DisplayExtent[2] = extent[2];
+    this->DisplayExtent[3] = extent[3];
+    this->DisplayExtent[4] = extent[4];
+    this->DisplayExtent[5] = extent[5]; }
+
   // Description:
   // Get the camera orientation as a simple integer [0,1,2,3,4,5]
   // that indicates one of the six major directions.  The integers
@@ -127,8 +157,8 @@ protected:
   // Description:
   // Do a checkerboard pattern to the alpha of an RGBA image
   void CheckerboardImage(
-  unsigned char *data, int xsize, int ysize,
-  const double imageSpacing[3], vtkImageProperty *property);
+    unsigned char *data, int xsize, int ysize,
+    const double imageSpacing[3], vtkImageProperty *property);
 
   int SliceNumber;
   int SliceNumberMinValue;
@@ -137,10 +167,15 @@ protected:
   int Cropping;
   int CroppingRegion[6];
   int DisplayExtent[6];
+  int ExactPixelMatch;
+  int PassColorData;
+  vtkPoints *Points;
 
 private:
   vtkImageSliceMapper(const vtkImageSliceMapper&);  // Not implemented.
   void operator=(const vtkImageSliceMapper&);  // Not implemented.
+
+  friend class vtkImageResliceMapper;
 };
 
 #endif

Rendering/vtkMesaImageResliceMapper.cxx

-/*=========================================================================
-
-  Program:   Visualization Toolkit
-  Module:    vtkMesaImageResliceMapper.cxx
-
-  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
-  All rights reserved.
-  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
-
-     This software is distributed WITHOUT ANY WARRANTY; without even
-     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
-     PURPOSE.  See the above copyright notice for more information.
-
-=========================================================================*/
-// This keeps the New method from being defined in included cxx file.
-#define VTK_IMPLEMENT_MESA_CXX
-#include "MangleMesaInclude/gl_mangle.h"
-#include "MangleMesaInclude/gl.h"
-
-#include <math.h>
-#include "vtkToolkits.h"
-#include "vtkMesaImageResliceMapper.h"
-#include "vtkMesaCamera.h"
-#include "vtkMesaRenderer.h"
-#include "vtkMesaRenderWindow.h"
-
-
-// make sure this file is included before the #define takes place
-// so we don't get two vtkMesaImageResliceMapper classes defined.
-#include "vtkOpenGLImageResliceMapper.h"
-#include "vtkMesaImageResliceMapper.h"
-
-// Make sure vtkMesaImageResliceMapper is a copy of vtkOpenGLImageResliceMapper
-// with vtkOpenGLImageResliceMapper replaced with vtkMesaImageResliceMapper
-#define vtkOpenGLImageResliceMapper vtkMesaImageResliceMapper
-#define vtkOpenGLRenderWindow vtkMesaRenderWindow
-#include "vtkOpenGLImageResliceMapper.cxx"
-#undef vtkOpenGLImageResliceMapper
-#undef vtkOpenGLRenderWindow
-
-vtkStandardNewMacro(vtkMesaImageResliceMapper);

Rendering/vtkMesaImageResliceMapper.h

-/*=========================================================================
-
-  Program:   Visualization Toolkit
-  Module:    vtkMesaImageResliceMapper.h
-
-  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
-  All rights reserved.
-  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
-
-     This software is distributed WITHOUT ANY WARRANTY; without even
-     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
-     PURPOSE.  See the above copyright notice for more information.
-
-=========================================================================*/
-// .NAME vtkMesaImageResliceMapper - OpenGL mapper for image slice display
-// .SECTION Description
-// vtkMesaImageResliceMapper is a concrete implementation of the abstract
-// class vtkImageResliceMapper that interfaces to the OpenGL library.
-// .SECTION Thanks
-// Thanks to David Gobbi at the Seaman Family MR Centre and Dept. of Clinical
-// Neurosciences, Foothills Medical Centre, Calgary, for providing this class.
-
-#ifndef __vtkMesaImageResliceMapper_h
-#define __vtkMesaImageResliceMapper_h
-
-#include "vtkImageResliceMapper.h"
-
-class vtkWindow;
-class vtkRenderer;
-class vtkRenderWindow;
-class vtkOpenGLRenderWindow;
-class vtkImageSlice;
-class vtkImageProperty;
-class vtkImageData;
-class vtkMatrix4x4;
-
-class VTK_RENDERING_EXPORT vtkMesaImageResliceMapper :
-  public vtkImageResliceMapper
-{
-public:
-  static vtkMesaImageResliceMapper *New();
-  vtkTypeMacro(vtkMesaImageResliceMapper,vtkImageResliceMapper);
-  virtual void PrintSelf(ostream& os, vtkIndent indent);
-
-  // Description:
-  // Implement base class method.  Perform the render.
-  void Render(vtkRenderer *ren, vtkImageSlice *prop);
-
-  // Description:
-  // Release any graphics resources that are being consumed by this
-  // mapper, the image texture in particular. Using the same texture
-  // in multiple render windows is NOT currently supported.
-  void ReleaseGraphicsResources(vtkWindow *);
-
-protected:
-  vtkMesaImageResliceMapper();
-  ~vtkMesaImageResliceMapper();
-
-  // Description:
-  // Load the texture and geometry.
-  void Load(vtkRenderer *ren, vtkProp3D *prop, vtkImageProperty *property);
-
-  // Description:
-  // Non-recursive internal method, generate a single texture
-  // and its corresponding geometry.
-  void InternalLoad(
-    vtkRenderer *ren, vtkProp3D *prop, vtkImageProperty *property,
-    vtkImageData *image, int extent[6], bool recursive);
-
-  // Description:
-  // Given an extent that describes a slice (it must have unit thickness
-  // in one of the three directions), return the dimension indices that
-  // correspond to the texture "x" and "y", provide the x, y image size,
-  // and provide the texture size (padded to a power of two if the hardware
-  // requires).
-  void ComputeTextureSize(
-    const int extent[6], int &xdim, int &ydim,