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annotate libinterp/dldfcn/__osmesa_print__.cc @ 19737:a81177f4bfe6

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Add __osmesa_print__.cc for offscreen rendering with OpenGL * configure.ac: Add checks for libOSMesa * libinterp/dldfcn/module-files: Add __osmesa_print__.cc * __osmesa_print__.cc: New private function to print figures using OSMesa and gl2ps for vector formats. Not yet used from "print".
author Andreas Weber <andy.weber.aw@gmail.com>
date Fri, 13 Feb 2015 00:31:10 +0100
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children 59ad278cfb98
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19737
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1 /*
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2
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3 Copyright (C) 2015 Andreas Weber <andy.weber.aw@gmail.com>
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 This code is based on Brian Pauls' src/osdemos/osdemo.c
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22 from git://anongit.freedesktop.org/mesa/demos
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23
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24 */
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25
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26 #ifdef HAVE_CONFIG_H
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27 #include <config.h>
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28 #endif
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29
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30 #include "defun-dld.h"
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31 #include "gl-render.h"
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32 #include "gl2ps-renderer.h"
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33 #include "graphics.h"
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34
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35 #include "gripes.h"
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36
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37 #ifdef HAVE_OSMESA
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38 #include "GL/osmesa.h"
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39 #endif
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40
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41 DEFUN_DLD(__osmesa_print__, args, ,
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42 "-*- texinfo -*-\n\
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43 @deftypefn {Loadable Function} __osmesa_print__ (@var{h}, @var{filename}, @var{term})\n\
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44 @deftypefnx {Loadable Function} {@var{img} =} __osmesa_print__ (@var{h})\n\
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45 Print figure @var{h} using OSMesa and gl2ps for vector formats.\n\
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46 \n\
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47 This is a private internal function.\n\
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48 The first method calls gl2ps with the appropriate @var{term} and writes\n\
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49 the output of gl2ps to @var{filename}.\n\
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50 \n\
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51 Valid options for @var{term}, which can be concatenated in one string, are:\n\
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52 @table @asis\n\
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53 @item @qcode{eps}, @qcode{pdf}, @qcode{ps}, @qcode{svg}, @qcode{pgf}, @qcode{tex}\n\
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54 Select output format.\n\
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55 @item @qcode{is2D}\n\
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56 Use GL2PS_SIMPLE_SORT instead of GL2PS_BSP_SORT as Z-depth sorting algorithm.\n\
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57 @item @qcode{notext}\n\
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58 Don't render text.\n\
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59 @end table\n\
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60 \n\
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61 The second method doesn't use gl2ps and returns a RGB image in @var{img} instead.\n\
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62 \n\
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63 @end deftypefn")
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64 {
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65 octave_value_list retval;
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66
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67 #ifndef HAVE_OSMESA
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68 gripe_disabled_feature ("__osmesa_print__", "Offscreen rendering");
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69 #else
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70
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71 int nargin = args.length ();
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72
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73 if (! (nargin == 1 || nargin == 3))
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74 {
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75 print_usage ();
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76 return retval;
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77 }
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78
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79 if ((nargin == 3))
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80 {
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81 if(! (args(1).is_string () && args(2).is_string ()))
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82 {
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83 error ("__osmesa_print__: FILENAME and TERM has to be strings");
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84 return retval;
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85 }
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86
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87 #ifndef HAVE_GL2PS_H
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88 error ("__osmesa_print__: Octave has been compiled without gl2ps");
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89 return retval;
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90 #endif
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91 }
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92
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93 int h = args(0).double_value ();
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94 graphics_object fobj = gh_manager::get_object (h);
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95 if (! (fobj && fobj.isa ("figure")))
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96 {
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97 error ("__osmesa_print__: H has to be a valid figure handle");
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98 return retval;
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99 }
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100
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101 figure::properties& fp =
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102 dynamic_cast<figure::properties&> (fobj.get_properties ());
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103
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104 bool internal = true;
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105 Matrix bb = fp.get_boundingbox (internal);
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106
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107 int Width = bb(2);
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108 int Height = bb(3);
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109
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110 OSMesaContext ctx;
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111 void *buffer;
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112
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113 // Create an RGBA-mode context, specify Z=16, stencil=0, accum=0 sizes
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114 ctx = OSMesaCreateContextExt (OSMESA_RGBA, 16, 0, 0, NULL);
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115 if (! ctx)
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116 {
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117 error ("__osmesa_print__: OSMesaCreateContext failed!\n");
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118 return retval;
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119 }
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120
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121 // Allocate the image buffer
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122 buffer = malloc (Width * Height * 4 * sizeof (GLubyte));
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123 if (! buffer)
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124 {
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
125 error ("__osmesa_print__: Alloc image buffer failed!\n");
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
126 return retval;
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
127 }
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
128
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
129 // Bind the buffer to the context and make it current
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
130 if (! OSMesaMakeCurrent (ctx, buffer, GL_UNSIGNED_BYTE, Width, Height))
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
131 {
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
132 error ("__osmesa_print__: OSMesaMakeCurrent failed!\n");
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
133 return retval;
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
134 }
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
135
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
136 // Test for a bug in OSMesa with version < 9.0
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
137 // Unfortunately the macros OSMESA_MAJOR_VERSION and OSMESA_MINOR_VERSION weren't
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
138 // updated between many releases and can't be used for detection therefore.
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
139 // (Version 8.0 until 9.1.4 all return MAJOR 6, MINOR 5)
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
140 int z, s;
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
141 glGetIntegerv (GL_DEPTH_BITS, &z);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
142 glGetIntegerv (GL_STENCIL_BITS, &s);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
143 if ((z != 16) || (s != 0))
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
144 error ("__osmesa_print__: Depth and stencil doesn't match,"
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
145 " are you sure you are using OSMesa >= 9.0?");
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
146
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
147 // check if the figure is visible
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
148 bool v = fp.is_visible ();
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
149 if (v)
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
150 fp.set_visible ("off");
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
151
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
152 if (nargin == 3)
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
153 {
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
154 // write gl2ps output to file
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
155 std::string filename = args(1).string_value ();
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
156 std::string term = args(2).string_value ();
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
157
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
158 FILE *filep;
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
159 filep = fopen (filename.c_str (), "w");
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
160 if (filep)
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
161 {
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
162 glps_renderer rend (filep, term);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
163 rend.draw (fobj, "");
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
164
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
165 // Make sure buffered commands are finished!!!
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
166 glFinish ();
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
167
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
168 fclose (filep);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
169 }
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
170 else
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
171 error ("__osmesa_print__: Couldn't create file \"%s\"", filename.c_str ());
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
172
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
173 }
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
174 else
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
175 {
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
176 // return RGB image
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
177 opengl_renderer rend;
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
178 rend.draw (fobj);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
179
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
180 // Make sure buffered commands are finished!!!
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
181 glFinish ();
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
182
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
183 dim_vector dv (4, Width, Height);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
184
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
185 // FIXME: We expect that GLubyte is 1 Byte long.
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
186 // Adapt code if this isn't always true
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
187 assert (sizeof (GLubyte) == 1);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
188 uint8NDArray img (dv);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
189 unsigned char *p = reinterpret_cast<unsigned char*>(img.fortran_vec ());
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
190 memcpy (p, buffer, (4 * Width * Height));
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
191
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
192 Array<octave_idx_type> perm (dim_vector (3, 1));
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
193 perm(0) = 2;
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
194 perm(1) = 1;
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
195 perm(2) = 0;
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
196
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
197 Array<idx_vector> idx (dim_vector (3, 1));
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
198
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
199 // Flip Y
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
200 idx(0) = idx_vector::make_range (Height - 1, -1, Height);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
201 idx(1) = idx_vector::colon;
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
202
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
203 // Remove alpha channel
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
204 idx(2) = idx_vector (0, 3);
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
205 retval = octave_value (img.permute (perm). index(idx));
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
206 }
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
207
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
208 // restore visibility if necessary
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
209 if (v)
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
210 fp.set_visible ("on");
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
211
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
212 free (buffer);
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
213 OSMesaDestroyContext (ctx);
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
214
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
215 #endif
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
216 return retval;
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
217 }
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
218
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
219 /*
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
220 %!testif HAVE_OSMESA
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
221 %! h = figure ("visible", "off");
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
222 %! fn = tempname ();
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
223 %! sombrero ();
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
224 %! __osmesa_print__ (h, fn, "svg");
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
225 %! assert (stat (fn).size, 2692270, -0.1);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
226 %! unlink (fn);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
227 %! img = __osmesa_print__ (h);
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
228 %! assert (size (img), [get(h, "position")([4, 3]), 3])
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
229 %! ## Use pixel sum per RGB channel as fingerprint
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
230 %! img_fp = squeeze (sum (sum (img), 2));
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
231 %! assert (img_fp, [52942515; 54167797; 56158178], -0.05);
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
232
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
233 %!testif HAVE_OSMESA
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
234 %! h = figure ("visible", "off");
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
235 %! fn = tempname ();
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
236 %! plot (sin (0:0.1:2*pi));
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
237 %! __osmesa_print__ (h, fn, "svgis2d");
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
238 %! assert (stat (fn).size, 7438, -0.05);
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
239 %! unlink (fn);
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
240 %! img = __osmesa_print__ (h);
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
241 %! assert (size (img), [get(h, "position")([4, 3]), 3])
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
242 %! ## Use pixel sum per RGB channel as fingerprint
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
243 %! img_fp = squeeze (sum (sum (img), 2));
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
244 %! assert (img_fp, [59281711; 59281711; 59482179], -0.05);
a81177f4bfe6 Add __osmesa_print__.cc for offscreen rendering with OpenGL
Andreas Weber <andy.weber.aw@gmail.com>
parents:
diff changeset
245 */