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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkPostScriptWriter.h"
#include "vtkImageData.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkPostScriptWriter);
#define VTK_MARGIN 0.95
void vtkPostScriptWriter::WriteFileTrailer(ostream* file, vtkImageData* vtkNotUsed(cache))
{
*file << "\ngrestore\nshowpage\n%%%%Trailer\n";
}
void vtkPostScriptWriter::WriteFileHeader(ostream* file, vtkImageData* cache, int wExt[6])
{
int min1 = wExt[0], max1 = wExt[1], min2 = wExt[2], max2 = wExt[3];
int bpp;
int cols, rows, scols, srows;
float scale = 1;
int pagewid = (int)(8.5 * 72);
int pagehgt = 11 * 72;
// Find the length of the rows to write.
bpp = cache->GetNumberOfScalarComponents();
cols = max1 - min1 + 1;
rows = max2 - min2 + 1;
float pixfac = 0.96; /* 1, approx. */
scols = (int)(cols * pixfac);
srows = (int)(rows * pixfac);
if (scols > pagewid * VTK_MARGIN || srows > pagehgt * VTK_MARGIN)
{
if (scols > pagewid * VTK_MARGIN)
{
scale = scale * (pagewid * VTK_MARGIN / scols);
scols = (int)(scale * cols * pixfac);
srows = (int)(scale * rows * pixfac);
}
if (srows > pagehgt * VTK_MARGIN)
{
scale = scale * (pagehgt * VTK_MARGIN / srows);
scols = (int)(scale * cols * pixfac);
srows = (int)(scale * rows * pixfac);
}
}
float llx = (pagewid - scols) / 2;
float lly = (pagehgt - srows) / 2;
// spit out the PostScript header
*file << "%!PS-Adobe-2.0 EPSF-2.0\n";
*file << "%%Creator: Visualization Toolkit\n";
*file << "%%Title: " << this->InternalFileName << endl;
*file << "%%Pages: 1\n";
*file << "%%BoundingBox: " << (int)llx << " " << (int)lly << " " << (int)(llx + scols + 0.5)
<< " " << (int)(lly + srows + 0.5) << endl;
*file << "%%EndComments\n";
*file << "/readstring {\n";
*file << " currentfile exch readhexstring pop\n";
*file << "} bind def\n";
if (bpp == 3)
{
*file << "/rpicstr " << cols << " string def\n";
*file << "/gpicstr " << cols << " string def\n";
*file << "/bpicstr " << cols << " string def\n";
}
else if (bpp == 1)
{
*file << "/picstr " << cols << " string def\n";
}
else
{
vtkWarningMacro(" vtkPostScriptWriter only supports 1 and 3 component images");
}
*file << "%%EndProlog\n";
*file << "%%Page: 1 1\n";
*file << "gsave\n";
*file << llx << " " << lly << " translate\n";
*file << scols << " " << srows << " scale\n";
*file << cols << " " << rows << " 8\n";
*file << "[ " << cols << " 0 0 " << -rows << " 0 " << rows << " ]\n";
if (bpp == 3)
{
*file << "{ rpicstr readstring }\n";
*file << "{ gpicstr readstring }\n";
*file << "{ bpicstr readstring }\n";
*file << "true 3\n";
*file << "colorimage\n";
}
else
{
*file << "{ picstr readstring }\n";
*file << "image\n";
}
}
void vtkPostScriptWriter::WriteFile(
ostream* file, vtkImageData* data, int extent[6], int wExtent[6])
{
int idxC, idx0, idx1, idx2;
unsigned char* ptr;
unsigned long count = 0;
unsigned long target;
float progress = this->Progress;
float area;
static int itemsperline = 0;
const char* hexits = "0123456789abcdef";
// Make sure we actually have data.
if (!data->GetPointData()->GetScalars())
{
vtkErrorMacro(<< "Could not get data from input.");
return;
}
// take into consideration the scalar type
switch (data->GetScalarType())
{
case VTK_UNSIGNED_CHAR:
break;
default:
vtkErrorMacro("PostScriptWriter only accepts unsigned char scalars!");
return;
}
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));
int numComponents = data->GetNumberOfScalarComponents();
// ignore alpha
int maxComponent = numComponents;
if (numComponents == 2)
{
maxComponent = 1;
}
if (numComponents == 4)
{
maxComponent = 3;
}
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[3]; idx1 >= extent[2]; idx1--)
{
if (!(count % target))
{
this->UpdateProgress(progress + count / (50.0 * target));
}
count++;
// write out components one at a time because
for (idxC = 0; idxC < maxComponent; idxC++)
{
ptr = (unsigned char*)data->GetScalarPointer(extent[0], idx1, idx2);
ptr += idxC;
for (idx0 = extent[0]; idx0 <= extent[1]; idx0++)
{
if (itemsperline == 30)
{
*file << endl;
itemsperline = 0;
}
*file << hexits[*ptr >> 4] << hexits[*ptr & 15];
++itemsperline;
ptr += numComponents;
}
}
}
}
}
//------------------------------------------------------------------------------
void vtkPostScriptWriter::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
VTK_ABI_NAMESPACE_END
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