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Reference Guide
TGLOutput.cxx
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1// @(#)root/gl:$Id$
2// Author: Richard Maunder, Olivier Couet 02/07/2005
3
4/*************************************************************************
5 * Copyright (C) 1995-2005, 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#include "TGLOutput.h"
13
14#include "Riostream.h"
15#include "TVirtualPad.h"
16#include "TVirtualPS.h"
17#include "TGLViewer.h"
18#include "TSystem.h" // For gSystem
19#include "gl2ps.h"
20#include "TError.h"
21#include <assert.h>
22
23/** \class TGLOutput
24\ingroup opengl
25Wrapper class for GL capture & output routines
26*/
27
29
30////////////////////////////////////////////////////////////////////////////////
31/// Capture viewer to file. Arguments are:
32/// - 'viewer' - viewer object to capture from
33/// - 'format' - output format - only postscript types presently.
34/// One of kEPS_SIMPLE, kEPS_BSP, kPDF_SIMPLE or kPDF_BSP
35/// See TGLOutput::CapturePostscript() for meanings
36/// - 'filePath' - file output name. If null defaults to './viewer.eps' or './viewer.pdf'
37/// depending on format requested
38///
39/// Note : Output files can be large and take considerable time (up to mins)
40/// to generate
41
42Bool_t TGLOutput::Capture(TGLViewer & viewer, EFormat format, const char * filePath)
43{
44 switch(format) {
45 case(kEPS_SIMPLE):
46 case(kEPS_BSP):
47 case(kPDF_SIMPLE):
48 case(kPDF_BSP): {
49 return CapturePostscript(viewer, format, filePath);
50 }
51 }
52
53 assert(kFALSE);
54 return kFALSE;
55}
56
57////////////////////////////////////////////////////////////////////////////////
58/// Capture viewer to postscript file. Arguments are:
59/// - 'viewer' - viewer object to capture from
60/// - 'format' - output format
61/// - kEPS_SIMPLE - lower quality EPS
62/// - kEPS_BSP - higher quality EPS
63/// - kPDF_SIMPLE - lower quality PDF
64/// - kPDF_BSP - higher quality PDF
65/// - 'filePath' - file output name. If null defaults to './viewer.eps' or './viewer.pdf'
66/// depending on format requested
67
68Bool_t TGLOutput::CapturePostscript(TGLViewer & viewer, EFormat format, const char * filePath)
69{
70 if (!filePath || !filePath[0]) {
71 if (format == kEPS_SIMPLE || format == kEPS_BSP) {
72 filePath = "viewer.eps";
73 } else if (format == kPDF_SIMPLE || format == kPDF_BSP) {
74 filePath = "viewer.pdf";
75 }
76 }
77 Info("TGLOutput::Postscript()", "Start creating %s.", filePath);
78 std::cout << "Please wait.";
79
80 if (FILE *output = fopen (filePath, "w+b"))
81 {
82 Int_t gl2psFormat;
83 Int_t gl2psSort;
84
85 switch(format) {
86 case kEPS_SIMPLE:
87 gl2psFormat = GL2PS_EPS;
88 gl2psSort = GL2PS_SIMPLE_SORT;
89 break;
90 case kEPS_BSP:
91 gl2psFormat = GL2PS_EPS;
92 gl2psSort = GL2PS_BSP_SORT;
93 break;
94 case kPDF_SIMPLE:
95 gl2psFormat = GL2PS_PDF;
96 gl2psSort = GL2PS_SIMPLE_SORT;
97 break;
98 case kPDF_BSP:
99 gl2psFormat = GL2PS_PDF;
100 gl2psSort = GL2PS_BSP_SORT;
101 break;
102 default:
103 assert(kFALSE);
104 return kFALSE;
105 }
106 Int_t buffsize = 0, state = GL2PS_OVERFLOW;
107 viewer.DoDraw();
108 viewer.fIsPrinting = kTRUE;
109 while (state == GL2PS_OVERFLOW) {
110 buffsize += 1024*1024;
111 gl2psBeginPage ("ROOT Scene Graph", "ROOT", NULL,
112 gl2psFormat, gl2psSort, GL2PS_USE_CURRENT_VIEWPORT
113 | GL2PS_SILENT | GL2PS_BEST_ROOT | GL2PS_OCCLUSION_CULL | 0,
114 GL_RGBA, 0, NULL,0, 0, 0,
115 buffsize, output, NULL);
116 viewer.DoDraw();
117 state = gl2psEndPage();
118 std::cout << ".";
119 }
120 std::cout << std::endl;
121 fclose (output);
122 viewer.fIsPrinting = kFALSE;
123 if (!gSystem->AccessPathName(filePath)) {
124 Info("TGLOutput::Postscript", "Finished creating %s.", filePath);
125 return kTRUE;
126 }
127 } else {
128 Error("TGLOutput::Postscript", "Failed to create %s. ", filePath);
129 }
130
131 return kFALSE;
132}
133
134////////////////////////////////////////////////////////////////////////////////
135/// this function used by gl-in-pad
136
138{
139 Info("TGLOutput::StartEmbeddedPS", "PS output started ...");
140
141 gVirtualPS->PrintStr("@");
142 gVirtualPS->PrintStr("% Start gl2ps EPS@");
143 gVirtualPS->PrintStr("newpath gsave save@");
144 Double_t xx[2] = {0.}, yy[2] = {0.};
145 xx[0] = gPad->GetUxmin();
146 yy[0] = gPad->GetUymin();
147 xx[1] = gPad->GetUxmax();
148 yy[1] = gPad->GetUymax();
149 gVirtualPS->PrintStr("@");
150
151 GLint vp[4];
152 glGetIntegerv(GL_VIEWPORT,vp);
153 gVirtualPS->DrawPS(0, xx, yy);
154 gVirtualPS->PrintStr(" exch");
155 xx[0] = xx[1];
156 yy[0] = yy[1];
157 gVirtualPS->DrawPS(0, xx, yy);
158 gVirtualPS->PrintStr(" 4 1 roll exch sub 3 1 roll sub");
159 gVirtualPS->WriteInteger(2*4*gPad->GetBorderSize());
160 gVirtualPS->PrintStr(" sub exch");
161 gVirtualPS->WriteInteger(2*4*gPad->GetBorderSize());
162 gVirtualPS->PrintStr(" sub exch");
163 gVirtualPS->WriteInteger((Int_t)(vp[3]));
164 gVirtualPS->WriteInteger((Int_t)(vp[2]));
165 gVirtualPS->PrintStr(" 4 1 roll div 3 1 roll exch div exch scale@");
166 gVirtualPS->PrintStr("@");
167 gVirtualPS->PrintStr("countdictstack@");
168 gVirtualPS->PrintStr("mark@");
169 gVirtualPS->PrintStr("/showpage {} def@");
170
171 // Close the gVirtualPS output stream
172 std::ofstream *fs = (std::ofstream*)gVirtualPS->GetStream();
173 fs->close();
174
175}
176
177////////////////////////////////////////////////////////////////////////////////
178///this function used by gl-in-pad
179/// Restore the gVirtualPS output stream
180
182{
183 std::ofstream *fs = new std::ofstream(gVirtualPS->GetName(),std::ios::app);
185 gVirtualPS->PrintStr("@");
186 gVirtualPS->PrintStr("cleartomark@");
187 gVirtualPS->PrintStr("countdictstack exch sub { end } repeat@");
188 gVirtualPS->PrintStr("restore grestore@");
189 gVirtualPS->PrintStr("% End gl2ps EPS@");
190
191 Info("TGLOutput::CloseEmbeddedPS", "PS output finished");
192}
193
194////////////////////////////////////////////////////////////////////////////////
195///this function used by gl-viewer, embedded into pad
196
198{
200
201 FILE *output = fopen (gVirtualPS->GetName(), "a");
202 if (!output) {
203 //Quite stupid fix, since if fopen fails, CloseEmbeddedPS will also
204 //fail but still I have to do it.
205 Error("TGLOutput::Capture", "can not open file for embedding ps");
207 return;
208 }
209
210 Int_t gl2psFormat = GL2PS_EPS;
211 Int_t gl2psSort = GL2PS_BSP_SORT;
212 Int_t buffsize = 0, state = GL2PS_OVERFLOW;
213 viewer.DoDraw();
214 viewer.fIsPrinting = kTRUE;
215
216 while (state == GL2PS_OVERFLOW) {
217 buffsize += 1024*1024;
218 gl2psBeginPage ("ROOT Scene Graph", "ROOT", NULL,
219 gl2psFormat, gl2psSort, GL2PS_USE_CURRENT_VIEWPORT
220 | GL2PS_SILENT | GL2PS_BEST_ROOT | GL2PS_OCCLUSION_CULL | 0,
221 GL_RGBA, 0, NULL,0, 0, 0,
222 buffsize, output, NULL);
223 viewer.DoDraw();
224 state = gl2psEndPage();
225 std::cout << ".";
226 }
227
228 std::cout << std::endl;
229 fclose (output);
230 viewer.fIsPrinting = kFALSE;
231
233}
int Int_t
Definition: RtypesCore.h:41
const Bool_t kFALSE
Definition: RtypesCore.h:88
bool Bool_t
Definition: RtypesCore.h:59
double Double_t
Definition: RtypesCore.h:55
const Bool_t kTRUE
Definition: RtypesCore.h:87
#define ClassImp(name)
Definition: Rtypes.h:363
void Info(const char *location, const char *msgfmt,...)
void Error(const char *location, const char *msgfmt,...)
R__EXTERN TSystem * gSystem
Definition: TSystem.h:540
R__EXTERN TVirtualPS * gVirtualPS
Definition: TVirtualPS.h:81
#define gPad
Definition: TVirtualPad.h:286
Wrapper class for GL capture & output routines.
Definition: TGLOutput.h:26
static Bool_t Capture(TGLViewer &viewer, EFormat format, const char *filePath=0)
Capture viewer to file.
Definition: TGLOutput.cxx:42
static void CloseEmbeddedPS()
this function used by gl-in-pad Restore the gVirtualPS output stream
Definition: TGLOutput.cxx:181
static void StartEmbeddedPS()
this function used by gl-in-pad
Definition: TGLOutput.cxx:137
@ kEPS_SIMPLE
Definition: TGLOutput.h:28
@ kEPS_BSP
Definition: TGLOutput.h:28
@ kPDF_BSP
Definition: TGLOutput.h:28
@ kPDF_SIMPLE
Definition: TGLOutput.h:28
static Bool_t CapturePostscript(TGLViewer &viewer, EFormat format, const char *filePath)
Capture viewer to postscript file.
Definition: TGLOutput.cxx:68
Base GL viewer object - used by both standalone and embedded (in pad) GL.
Definition: TGLViewer.h:57
Bool_t fIsPrinting
debug mode (forced rebuild + draw scene/frustum/interest boxes)
Definition: TGLViewer.h:159
void DoDraw(Bool_t swap_buffers=kTRUE)
Draw out the viewer.
Definition: TGLViewer.cxx:550
virtual const char * GetName() const
Returns name of object.
Definition: TNamed.h:47
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:1286
virtual void SetStream(std::ofstream *os)
Definition: TVirtualPS.h:72
virtual void WriteInteger(Int_t i, Bool_t space=kTRUE)
Write one Integer to the file.
Definition: TVirtualPS.cxx:170
virtual void DrawPS(Int_t n, Float_t *xw, Float_t *yw)=0
virtual void PrintStr(const char *string="")
Output the string str in the output buffer.
Definition: TVirtualPS.cxx:72
virtual void * GetStream() const
Definition: TVirtualPS.h:71