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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkBMPWriter.h"
#include "vtkImageData.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkUnsignedCharArray.h"
#include <sstream>
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkBMPWriter);
vtkCxxSetObjectMacro(vtkBMPWriter, Result, vtkUnsignedCharArray);
vtkBMPWriter::vtkBMPWriter()
{
this->FileLowerLeft = 1;
this->Result = nullptr;
}
vtkBMPWriter::~vtkBMPWriter()
{
if (this->Result)
{
this->Result->Delete();
this->Result = nullptr;
}
}
void vtkBMPWriter::WriteFileHeader(ostream* file, vtkImageData*, int wExt[6])
{
long temp;
int width, height, dataWidth;
int row;
// Find the length of the rows to write.
width = (wExt[1] - wExt[0] + 1);
height = (wExt[3] - wExt[2] + 1);
dataWidth = ((width * 3 + 3) / 4) * 4;
// spit out the BMP header
file->put((char)66);
file->put((char)77);
temp = (long)(dataWidth * height) + 54L;
file->put((char)(temp % 256));
file->put((char)((temp % 65536L) / 256));
file->put((char)(temp / 65536L));
for (row = 0; row < 5; row++)
{
file->put((char)0);
}
file->put((char)54);
file->put((char)0);
file->put((char)0);
file->put((char)0);
// info header
file->put((char)40);
file->put((char)0);
file->put((char)0);
file->put((char)0);
file->put((char)(width % 256));
file->put((char)(width / 256));
file->put((char)0);
file->put((char)0);
file->put((char)(height % 256));
file->put((char)(height / 256));
file->put((char)0);
file->put((char)0);
file->put((char)1);
file->put((char)0);
file->put((char)24);
for (row = 0; row < 25; row++)
{
file->put((char)0);
}
}
void vtkBMPWriter::WriteFile(ostream* file, vtkImageData* data, int extent[6], int wExtent[6])
{
int idx1, idx2;
int rowLength, rowAdder, i; // in bytes
unsigned char* ptr;
int bpp;
unsigned long count = 0;
unsigned long target;
float progress = this->Progress;
float area;
bpp = data->GetNumberOfScalarComponents();
// Make sure we actually have data.
if (!data->GetPointData()->GetScalars())
{
vtkErrorMacro(<< "Could not get data from input.");
return;
}
// take into consideration the scalar type
if (data->GetScalarType() != VTK_UNSIGNED_CHAR)
{
vtkErrorMacro("BMPWriter only accepts unsigned char scalars!");
return;
}
// Row length of x axis
rowLength = extent[1] - extent[0] + 1;
rowAdder = (4 - ((extent[1] - extent[0] + 1) * 3) % 4) % 4;
area = ((extent[5] - extent[4] + 1) * (extent[3] - extent[2] + 1) * (extent[1] - extent[0] + 1)) /
((wExtent[5] - wExtent[4] + 1) * (wExtent[3] - wExtent[2] + 1) * (wExtent[1] - wExtent[0] + 1));
target =
(unsigned long)((extent[5] - extent[4] + 1) * (extent[3] - extent[2] + 1) / (50.0 * area));
target++;
for (idx2 = extent[4]; idx2 <= extent[5]; ++idx2)
{
for (idx1 = extent[2]; idx1 <= extent[3]; idx1++)
{
if (!(count % target))
{
this->UpdateProgress(progress + count / (50.0 * target));
}
count++;
ptr = (unsigned char*)data->GetScalarPointer(extent[0], idx1, idx2);
if (bpp == 1)
{
for (i = 0; i < rowLength; i++)
{
file->put(ptr[i]);
file->put(ptr[i]);
file->put(ptr[i]);
}
}
if (bpp == 2)
{
for (i = 0; i < rowLength; i++)
{
file->put(ptr[i * 2]);
file->put(ptr[i * 2]);
file->put(ptr[i * 2]);
}
}
if (bpp == 3)
{
for (i = 0; i < rowLength; i++)
{
file->put(ptr[i * 3 + 2]);
file->put(ptr[i * 3 + 1]);
file->put(ptr[i * 3]);
}
}
if (bpp == 4)
{
for (i = 0; i < rowLength; i++)
{
file->put(ptr[i * 4 + 2]);
file->put(ptr[i * 4 + 1]);
file->put(ptr[i * 4]);
}
}
for (i = 0; i < rowAdder; i++)
{
file->put((char)0);
}
}
}
}
void vtkBMPWriter::MemoryWrite(int dim, vtkImageData* input, int wExt[6], vtkInformation* inInfo)
{
std::ostringstream* oss;
oss = new std::ostringstream();
this->WriteFileHeader(oss, input, wExt);
this->RecursiveWrite(dim, input, inInfo, oss);
vtkUnsignedCharArray* r = vtkUnsignedCharArray::New();
r->SetNumberOfComponents(1);
size_t alen = oss->str().length();
r->SetNumberOfTuples(static_cast<vtkIdType>(alen));
unsigned char* buff = r->GetPointer(0);
memcpy(buff, oss->str().data(), alen);
this->SetResult(r);
r->Delete();
delete oss;
}
//------------------------------------------------------------------------------
void vtkBMPWriter::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Result: " << this->Result << "\n";
}
VTK_ABI_NAMESPACE_END
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