/*========================================================================= Program: Visualization Toolkit Module: $RCSfile: vtkRenderLargeImage.cxx,v $ Language: C++ Date: $Date: 2000/12/10 20:08:26 $ Version: $Revision: 1.15 $ Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission. * Modified source versions must be plainly marked as such, and must not be misrepresented as being the original software. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. =========================================================================*/ #include #include #include #include "vtkRenderLargeImage.h" #include "vtkRenderWindow.h" #include "vtkObjectFactory.h" //---------------------------------------------------------------------------- vtkRenderLargeImage* vtkRenderLargeImage::New() { // First try to create the object from the vtkObjectFactory vtkObject* ret = vtkObjectFactory::CreateInstance("vtkRenderLargeImage"); if(ret) { return (vtkRenderLargeImage*)ret; } // If the factory was unable to create the object, then create it here. return new vtkRenderLargeImage; } //---------------------------------------------------------------------------- vtkRenderLargeImage::vtkRenderLargeImage() { this->Input = NULL; this->Magnification = 3; } //---------------------------------------------------------------------------- vtkRenderLargeImage::~vtkRenderLargeImage() { if (this->Input) { this->Input->UnRegister(this); this->Input = NULL; } } //---------------------------------------------------------------------------- void vtkRenderLargeImage::PrintSelf(ostream& os, vtkIndent indent) { vtkImageSource::PrintSelf(os,indent); if ( this->Input ) { os << indent << "Input:\n"; this->Input->PrintSelf(os,indent.GetNextIndent()); } else { os << indent << "Input: (none)\n"; } os << indent << "Magnification: " << this->Magnification << "\n"; } //---------------------------------------------------------------------------- // Description: // This method returns the largest region that can be generated. void vtkRenderLargeImage::ExecuteInformation() { if (this->Input == NULL ) { vtkErrorMacro(<<"Please specify a renderer as input!"); return; } // set the extent, if the VOI has not been set then default to this->GetOutput()->SetWholeExtent(0, this->Magnification* this->Input->GetRenderWindow()->GetSize()[0] - 1, 0, this->Magnification* this->Input->GetRenderWindow()->GetSize()[1] - 1, 0, 0); // set the spacing this->GetOutput()->SetSpacing(1.0, 1.0, 1.0); // set the origin. this->GetOutput()->SetOrigin(0.0, 0.0, 0.0); // set the scalar components this->GetOutput()->SetNumberOfScalarComponents(3); this->GetOutput()->SetScalarType(VTK_UNSIGNED_CHAR); } //---------------------------------------------------------------------------- // Description: // This function reads a region from a file. The regions extent/axes // are assumed to be the same as the file extent/order. void vtkRenderLargeImage::Execute(vtkImageData *data) { int inExtent[6]; int inIncr[3]; int *size; int inWindowExtent[4]; double viewAngle, parallelScale, windowCenter[2]; vtkCamera *cam; unsigned char *pixels, *outPtr; int x, y, row; int rowSize, rowStart, rowEnd, colStart, colEnd; if (this->GetOutput()->GetScalarType() != VTK_UNSIGNED_CHAR) { vtkErrorMacro("mismatch in scalar types!"); return; } // Get the requested extents. this->GetOutput()->GetUpdateExtent(inExtent); // get and transform the increments data->GetIncrements(inIncr); // get the size of the render window size = this->Input->GetRenderWindow()->GetSize(); // convert the request into windows inWindowExtent[0] = inExtent[0]/size[0]; inWindowExtent[1] = inExtent[1]/size[0]; inWindowExtent[2] = inExtent[2]/size[1]; inWindowExtent[3] = inExtent[3]/size[1]; // store the old view angle & set the new cam = this->Input->GetActiveCamera(); cam->GetWindowCenter(windowCenter); viewAngle = cam->GetViewAngle(); parallelScale = cam->GetParallelScale(); cam->SetViewAngle(asin(sin(viewAngle*3.1415926/360.0)/this->Magnification) * 360.0 / 3.1415926); cam->SetParallelScale(parallelScale/this->Magnification); // render each of the tiles required to fill this request for (y = inWindowExtent[2]; y <= inWindowExtent[3]; y++) { for (x = inWindowExtent[0]; x <= inWindowExtent[1]; x++) { cam->SetWindowCenter(x*2 - this->Magnification*(1-windowCenter[0]) + 1, y*2 - this->Magnification*(1-windowCenter[1]) + 1); this->Input->GetRenderWindow()->Render(); pixels = this->Input->GetRenderWindow()->GetPixelData(0,0,size[0] - 1, size[1] - 1, 1); // now stuff the pixels into the data row by row colStart = inExtent[0] - x*size[0]; if (colStart < 0) { colStart = 0; } colEnd = size[0] - 1; if (colEnd > (inExtent[1] - x*size[0])) { colEnd = inExtent[1] - x*size[0]; } rowSize = colEnd - colStart + 1; // get the output pointer and do arith on it if necc outPtr = (unsigned char *)data->GetScalarPointer(inExtent[0],inExtent[2],0); outPtr = outPtr + (x*size[0] - inExtent[0])*inIncr[0] + (y*size[1] - inExtent[2])*inIncr[1]; rowStart = inExtent[2] - y*size[1]; if (rowStart < 0) { rowStart = 0; } rowEnd = size[1] - 1; if (rowEnd > (inExtent[3] - y*size[1])) { rowEnd = (inExtent[3] - y*size[1]); } for (row = rowStart; row <= rowEnd; row++) { memcpy(outPtr + row*inIncr[1] + colStart*inIncr[0], pixels + row*size[0]*3 + colStart*3, rowSize*3); } // free the memory delete [] pixels; } } cam->SetViewAngle(viewAngle); cam->SetParallelScale(parallelScale); cam->SetWindowCenter(windowCenter[0],windowCenter[1]); }