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TASPluginGS.cxx
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1// @(#)root/graf:$Id$
2// Author: Valeriy Onuchin 23/06/05
3
4/*************************************************************************
5 * Copyright (C) 1995-2001, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12/** \class TASPluginGS
13\ingroup asimage
14
15Allows to read PS/EPS/PDF files via GhostScript
16*/
17
18#include "TASPluginGS.h"
19#include "TSystem.h"
20#include "RConfigure.h"
21
22#ifdef R__HAS_COCOA
23# define X_DISPLAY_MISSING 1
24# define popen_flags "r"
25#elif defined (WIN32)
26# include "Windows4root.h"
27# define popen_flags "rb"
28#else
29# include <X11/Xlib.h>
30# define popen_flags "r"
31#endif
32
33#ifndef WIN32
34# include <afterbase.h>
35#else
36# include <win32/config.h>
37# include <win32/afterbase.h>
38# define X_DISPLAY_MISSING 1
39#endif
40# include <import.h>
41
42
44
45////////////////////////////////////////////////////////////////////////////////
46/// ctor
47
49{
50#ifndef WIN32
52#else
53 fInterpreter = gSystem->Which(gSystem->Getenv("PATH"), "gswin32c.exe", kExecutePermission);
54 if (fInterpreter) {
55 // which returned path may include blanks, like "Program Files" which popen does not like
56 delete [] fInterpreter;
57 fInterpreter = StrDup("gswin32c.exe");
58 }
59#endif
60}
61
62////////////////////////////////////////////////////////////////////////////////
63/// dtor
64
66{
67 delete [] fInterpreter;
68 fInterpreter = 0;
69}
70
71////////////////////////////////////////////////////////////////////////////////
72/// read PS/EPS/PDF file and convert it to ASImage
73
75{
76 if (!fInterpreter) {
77 Warning("File2ASImage", "GhostScript is not available");
78 return 0;
79 }
80
82 Warning("File2ASImage", "input file %s is not accessible", filename);
83 return 0;
84 }
85
86 TString ext = (strrchr(filename, '.') + 1);
87 ext.Strip();
88 ext.ToLower();
89
90 UInt_t width = 0;
91 UInt_t height = 0;
92 Bool_t eps = kFALSE;
93
94 if (ext == "eps") {
95 eps = kTRUE;
96 FILE *fd = fopen(filename, "r");
97 if (!fd) {
98 Warning("File2ASImage", "input file %s is not readable", filename);
99 return 0;
100 }
101
102 do {
103 char buf[128];
104 TString line = fgets(buf, 128, fd);
105 if (line.IsNull() || !line.BeginsWith("%")) break;
106
107 if (line.BeginsWith("%%BoundingBox:")) {
108 int lx, ly, ux, uy;
109 line = line(14, line.Length());
110 sscanf(line.Data(), "%d %d %d %d", &lx, &ly, &ux, &uy);
111 width = TMath::Abs(ux - lx);
112 height = TMath::Abs(uy - ly);
113 break;
114 }
115 } while (!feof(fd));
116
117 fclose(fd);
118 }
119
120 // command line to execute
121 TString cmd = fInterpreter;
122 if (eps) {
123 cmd += Form(" -g%dx%d", width, height);
124 }
125 cmd += " -dSAFER -dBATCH -dNOPAUSE -dQUIET -sDEVICE=png16m -dGraphicsAlphaBits=4 -sOutputFile=- ";
126 cmd += filename;
127 FILE *in = gSystem->OpenPipe(cmd.Data(), popen_flags);
128
129 if (!in) {
130 return 0;
131 }
132
133 const UInt_t kBuffLength = 32768;
134 static char buf[kBuffLength];
135 TString raw;
136
137 do {
138 Long_t r = fread(&buf, 1, kBuffLength, in);
139 raw.Append((const char*)&buf, r);
140 } while (!feof(in));
141
142 gSystem->ClosePipe(in);
143
144 ASImageImportParams params;
145 params.flags = 0;
146 params.width = width;
147 params.height = height;
148 params.filter = SCL_DO_ALL;
149 params.gamma = 0;
150 params.gamma_table = 0;
151 params.compression = 0;
152 params.format = ASA_ASImage;
153 params.search_path = 0;
154 params.subimage = 0;
155
156 ASImage *ret = PNGBuff2ASimage((CARD8 *)raw.Data(), &params);
157 return ret;
158}
const Bool_t kFALSE
Definition: RtypesCore.h:101
long Long_t
Definition: RtypesCore.h:54
const Bool_t kTRUE
Definition: RtypesCore.h:100
#define ClassImp(name)
Definition: Rtypes.h:375
#define popen_flags
Definition: TASPluginGS.cxx:30
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t Float_t Float_t Int_t Int_t UInt_t UInt_t Rectangle_t Int_t Int_t Window_t TString Int_t GCValues_t GetPrimarySelectionOwner GetDisplay GetScreen GetColormap GetNativeEvent const char const char dpyName wid window const char font_name cursor keysym reg const char only_if_exist regb h Point_t winding char text const char depth char const char Int_t count const char ColorStruct_t color const char filename
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t r
Option_t Option_t width
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t height
char * Form(const char *fmt,...)
Formats a string in a circular formatting buffer.
Definition: TString.cxx:2456
char * StrDup(const char *str)
Duplicate the string str.
Definition: TString.cxx:2524
@ kExecutePermission
Definition: TSystem.h:45
R__EXTERN TSystem * gSystem
Definition: TSystem.h:560
Allows to read PS/EPS/PDF files via GhostScript.
Definition: TASPluginGS.h:25
char * fInterpreter
path to GhostScript interpreter
Definition: TASPluginGS.h:28
TASPluginGS(const char *ext)
ctor
Definition: TASPluginGS.cxx:48
ASImage * File2ASImage(const char *filename) override
read PS/EPS/PDF file and convert it to ASImage
Definition: TASPluginGS.cxx:74
virtual ~TASPluginGS()
dtor
Definition: TASPluginGS.cxx:65
virtual void Warning(const char *method, const char *msgfmt,...) const
Issue warning message.
Definition: TObject.cxx:956
Basic string class.
Definition: TString.h:136
void ToLower()
Change string to lower-case.
Definition: TString.cxx:1159
TSubString Strip(EStripType s=kTrailing, char c=' ') const
Return a substring of self stripped at beginning and/or end.
Definition: TString.cxx:1140
const char * Data() const
Definition: TString.h:369
TString & Append(const char *cs)
Definition: TString.h:564
virtual const char * Getenv(const char *env)
Get environment variable.
Definition: TSystem.cxx:1666
virtual FILE * OpenPipe(const char *command, const char *mode)
Open a pipe.
Definition: TSystem.cxx:665
virtual Bool_t AccessPathName(const char *path, EAccessMode mode=kFileExists)
Returns FALSE if one can access a file using the specified access mode.
Definition: TSystem.cxx:1299
virtual int ClosePipe(FILE *pipe)
Close the pipe.
Definition: TSystem.cxx:674
virtual char * Which(const char *search, const char *file, EAccessMode mode=kFileExists)
Find location of file in a search path.
Definition: TSystem.cxx:1549
TLine * line
Short_t Abs(Short_t d)
Returns the absolute value of parameter Short_t d.
Definition: TMathBase.h:123