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[graf2d] support PDF output with mathtext #23217

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4 changes: 4 additions & 0 deletions README/ReleaseNotes/v642/index.md
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Expand Up @@ -180,6 +180,10 @@ This is not expected to affect typical usage, since the resolution model was nev

## Graphics and GUI

### Mathtext

Drawings using TMathText can be now exported as PDF, not only PNG and PS.

### New POLF and POLN draw options for TH2

Since ROOT 6.36 implementation of "POL" draw option was changed. Angle and radius range automatically scaled to visible histogram range filling full 2*Pi angle and full radius range.
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3 changes: 0 additions & 3 deletions graf2d/graf/src/TMathText.cxx
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Expand Up @@ -45,9 +45,6 @@ Begin_Macro
../../../tutorials/visualisation/graphics/tmathtext2.C
End_Macro

#### Limitation:
TMathText rendering is not implemented for the PDF output.
PostScript output should be used instead.
*/

const Double_t kPI = TMath::Pi();
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8 changes: 8 additions & 0 deletions graf2d/postscript/inc/TPDF.h
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Expand Up @@ -95,6 +95,10 @@ class TPDF : public TVirtualPS {
template<typename T>
void PrintPolyMarkerShape(Int_t n, T *x, T* y);

TString fFileName; ///< PDF file name
Bool_t fFontEmbed = kFALSE; ///< True is FontEmbed has been called
Bool_t fMustEmbed[29]; ///< flag to embed font

public:
TPDF();
TPDF(const char *filename, Int_t type=-111);
Expand All @@ -120,6 +124,10 @@ class TPDF : public TVirtualPS {
void LineTo(Double_t x, Double_t y);
void MoveTo(Double_t x, Double_t y);
void EndObject();
// bool FontEmbedType1(const char *filename);
bool FontEmbedType2(const char *filename);
bool FontEmbedType42(const char *filename);
void FontEmbed();
void FontEncode();
void NewObject(Int_t n);
void NewPage() override;
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190 changes: 190 additions & 0 deletions graf2d/postscript/src/TPDF.cxx
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Expand Up @@ -61,19 +61,23 @@ the table of contents.
#include "TROOT.h"
#include "TDatime.h"
#include "TColor.h"
#include "TEnv.h"
#include "TVirtualPad.h"
#include "TPoint.h"
#include "TPoints.h"
#include "TPDF.h"
#include "TStyle.h"
#include "TMath.h"
#include "TStorage.h"
#include "TSystem.h"
#include "TText.h"
#include "zlib.h"
#include "TObjString.h"
#include "TObjArray.h"
#include "snprintf.h"

#include "mathtext/fontembed.h"

// To scale fonts to the same size as the old TT version
const Float_t kScale = 0.93376068;

Expand Down Expand Up @@ -108,6 +112,7 @@ TPDF::TPDF() : TVirtualPS()
fCurrentPage = kObjFirstPage;
SetTitle("PDF");
gVirtualPS = this;
fFontEmbed = kFALSE;
}

////////////////////////////////////////////////////////////////////////////////
Expand Down Expand Up @@ -474,6 +479,50 @@ void TPDF::Close(Option_t *)
PrintStr("@");
PrintStr("%%EOF@");

// Embed the fonts previously used by TMathText
if (!fFontEmbed) {
// Close the file fFileName
if (fStream) {
PrintStr("@");
CloseStream();
}

// Rename the file fFileName
TString tmpname = TString::Format("%s_tmp_%d", fFileName.Data(), gSystem->GetPid());
if (gSystem->Rename(fFileName.Data(), tmpname.Data())) {
Error("Close", "Cannot open temporary file: %s", tmpname.Data());
return;
}

if (!OpenStream(fFileName.Data()) || gSystem->AccessPathName(fFileName.Data(), kWritePermission)) {
Error("Close", "Cannot open file: %s", fFileName.Data());
return;
}

// Embed the fonts at the right place
FILE *sg = fopen(tmpname.Data(), "r");
if (!sg) {
Error("Close", "Cannot open file: %s", tmpname.Data());
return;
}
char line[255];
while (fgets(line, 255, sg)) {
if (strstr(line, "EndComments"))
PrintStr("%%DocumentNeededResources: ProcSet (FontSetInit)@");
fStream->write(line, strlen(line));
// insert font after end of generic defines
if (!fFontEmbed && strstr(line, "/ita")) {
FontEmbed();
PrintStr("@");
}
}
fclose(sg);
if (gSystem->Unlink(tmpname.Data()))
return;
}

fFontEmbed = kFALSE;

// Close file stream
CloseStream();

Expand Down Expand Up @@ -1031,6 +1080,146 @@ void TPDF::FontEncode()
EndObject();
}
}
////////////////////////////////////////////////////////////////////////////////

Bool_t TPDF::FontEmbedType2(const char *filename)
{
std::ifstream font_file(filename, std::ios::binary);

// We cannot read directly using iostream iterators due to
// signedness
font_file.seekg(0, std::ios::end);

const size_t font_file_length = font_file.tellg();

font_file.seekg(0, std::ios::beg);

std::vector<unsigned char> font_data(font_file_length, '\0');

font_file.read(reinterpret_cast<char *>(&font_data[0]), font_file_length);

std::string font_name;
auto pdf_string_map = mathtext::font_embed_pdf_t::font_embed_type_2(font_name, font_data);

if (!pdf_string_map.empty()) {
// PrintRaw(postscript_string.size(), postscript_string.data());
// PrintStr("@");

return true;
}

return false;
}

////////////////////////////////////////////////////////////////////////////////

Bool_t TPDF::FontEmbedType42(const char *filename)
{
std::ifstream font_file(filename, std::ios::binary);

// We cannot read directly using iostream iterators due to signedness

font_file.seekg(0, std::ios::end);

const size_t font_file_length = font_file.tellg();

font_file.seekg(0, std::ios::beg);

std::vector<unsigned char> font_data(font_file_length, '\0');

font_file.read(reinterpret_cast<char *>(&font_data[0]), font_file_length);

std::string font_name;
auto pdf_string_map = mathtext::font_embed_pdf_t::font_embed_type_42(font_name, font_data);

if (!pdf_string_map.empty()) {
// PrintRaw(postscript_string.size(), postscript_string.data());
// PrintStr("@");

return true;
}
fprintf(stderr, "%s:%d:\n", __FILE__, __LINE__);

return false;
}

////////////////////////////////////////////////////////////////////////////////
/// Embed font in PDF file.

void TPDF::FontEmbed()
{
static const char *fonttable[32][2] = {{"Root.TTFont.0", "FreeSansBold.otf"},
{"Root.TTFont.1", "FreeSerifItalic.otf"},
{"Root.TTFont.2", "FreeSerifBold.otf"},
{"Root.TTFont.3", "FreeSerifBoldItalic.otf"},
{"Root.TTFont.4", "FreeSans.otf"},
{"Root.TTFont.5", "FreeSansOblique.otf"},
{"Root.TTFont.6", "FreeSansBold.otf"},
{"Root.TTFont.7", "FreeSansBoldOblique.otf"},
{"Root.TTFont.8", "FreeMono.otf"},
{"Root.TTFont.9", "FreeMonoOblique.otf"},
{"Root.TTFont.10", "FreeMonoBold.otf"},
{"Root.TTFont.11", "FreeMonoBoldOblique.otf"},
{"Root.TTFont.12", "symbol.ttf"},
{"Root.TTFont.13", "FreeSerif.otf"},
{"Root.TTFont.14", "wingding.ttf"},
{"Root.TTFont.15", "symbol.ttf"},
{"Root.TTFont.STIXGen", "STIXGeneral.otf"},
{"Root.TTFont.STIXGenIt", "STIXGeneralItalic.otf"},
{"Root.TTFont.STIXGenBd", "STIXGeneralBol.otf"},
{"Root.TTFont.STIXGenBdIt", "STIXGeneralBolIta.otf"},
{"Root.TTFont.STIXSiz1Sym", "STIXSiz1Sym.otf"},
{"Root.TTFont.STIXSiz1SymBd", "STIXSiz1SymBol.otf"},
{"Root.TTFont.STIXSiz2Sym", "STIXSiz2Sym.otf"},
{"Root.TTFont.STIXSiz2SymBd", "STIXSiz2SymBol.otf"},
{"Root.TTFont.STIXSiz3Sym", "STIXSiz3Sym.otf"},
{"Root.TTFont.STIXSiz3SymBd", "STIXSiz3SymBol.otf"},
{"Root.TTFont.STIXSiz4Sym", "STIXSiz4Sym.otf"},
{"Root.TTFont.STIXSiz4SymBd", "STIXSiz4SymBol.otf"},
{"Root.TTFont.STIXSiz5Sym", "STIXSiz5Sym.otf"},
{"Root.TTFont.ME", "DroidSansFallback.ttf"},
{"Root.TTFont.CJKMing", "DroidSansFallback.ttf"},
{"Root.TTFont.CJKCothic", "DroidSansFallback.ttf"}};

PrintStr("%%IncludeResource: ProcSet (FontSetInit)@");

// try to load font (font must be in Root.TTFontPath resource)
const char *ttpath = gEnv->GetValue("Root.TTFontPath", TROOT::GetTTFFontDir());

for (Int_t fontid = 1; fontid < 30; fontid++) {
if (fontid != 15 && fMustEmbed[fontid - 1]) {
TString filename = gEnv->GetValue(fonttable[fontid][0], fonttable[fontid][1]);
const char *ttfont = gSystem->FindFile(ttpath, filename, kReadPermission);
if (!ttfont) {
Error("FontEmbed", "font %d (filename '%s') not found in path", fontid, filename.Data());
} else if (FontEmbedType2(ttfont)) {
// nothing
/*} else if(FontEmbedType1(ttfont)) {
// nothing*/
} else if (FontEmbedType42(ttfont)) {
// nothing
} else {
Error("FontEmbed", "failed to embed font %d (filename '%s')", fontid, filename.Data());
}
}
}
PrintStr("%%IncludeResource: font Times-Roman@");
PrintStr("%%IncludeResource: font Times-Italic@");
PrintStr("%%IncludeResource: font Times-Bold@");
PrintStr("%%IncludeResource: font Times-BoldItalic@");
PrintStr("%%IncludeResource: font Helvetica@");
PrintStr("%%IncludeResource: font Helvetica-Oblique@");
PrintStr("%%IncludeResource: font Helvetica-Bold@");
PrintStr("%%IncludeResource: font Helvetica-BoldOblique@");
PrintStr("%%IncludeResource: font Courier@");
PrintStr("%%IncludeResource: font Courier-Oblique@");
PrintStr("%%IncludeResource: font Courier-Bold@");
PrintStr("%%IncludeResource: font Courier-BoldOblique@");
PrintStr("%%IncludeResource: font Symbol@");
PrintStr("%%IncludeResource: font ZapfDingbats@");

fFontEmbed = kTRUE;
}

////////////////////////////////////////////////////////////////////////////////
/// Draw a line to a new position
Expand Down Expand Up @@ -1329,6 +1518,7 @@ void TPDF::Open(const char *fname, Int_t wtype)
Error("Open", "Cannot open file: %s", fname);
return;
}
fFileName = fname;

gVirtualPS = this;

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1 change: 1 addition & 0 deletions tutorials/visualisation/graphics/tmathtext.C
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Expand Up @@ -38,6 +38,7 @@

c1->Print("c1.png");
c1->Print("c1.ps");
c1->Print("c1.pdf");

return c1;
}
4 changes: 4 additions & 0 deletions tutorials/visualisation/graphics/tmathtext2.C
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Expand Up @@ -1890,5 +1890,9 @@ TCanvas *tmathtext2()
l.DrawMathText(x1, y, "\\tanh");
l.DrawText(x2, y, "\\tanh");

// c1->Print("c2.png");
// c1->Print("c2.ps");
// c1->Print("c2.pdf");

return c1;
}