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annotate libinterp/dldfcn/__osmesa_print__.cc @ 19741:59ad278cfb98

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__opengl_print__.m: Use OSMesa for offscreen rendering (Bug #33180) * __opengl_print__.m: Call __osmesa_print__ if figure is invisible * __osmesa_print__.cc: Add method to create process and pipe gl2ps output to it for compatibility with __opengl_print__ and drawnow. * NEWS: Mention offscreen rendering
author Andreas Weber <andy.weber.aw@gmail.com>
date Fri, 13 Feb 2015 17:24:38 +0100
parents a81177f4bfe6
children 5cfb3ccbf24a
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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{file}, @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{file}. If the first character of @var{file}\n\
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50 is @qcode{|}, then a process is started and the output of gl2ps is piped to it.\n\
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51 \n\
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52 Valid options for @var{term}, which can be concatenated in one string, are:\n\
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53 @table @asis\n\
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54 @item @qcode{eps}, @qcode{pdf}, @qcode{ps}, @qcode{svg}, @qcode{pgf}, @qcode{tex}\n\
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55 Select output format.\n\
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56 @item @qcode{is2D}\n\
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57 Use GL2PS_SIMPLE_SORT instead of GL2PS_BSP_SORT as Z-depth sorting algorithm.\n\
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58 @item @qcode{notext}\n\
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59 Don't render text.\n\
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60 @end table\n\
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61 \n\
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62 The second method doesn't use gl2ps and returns a RGB image in @var{img} instead.\n\
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63 \n\
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64 @end deftypefn")
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65 {
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66 octave_value_list retval;
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67
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68 #ifndef HAVE_OSMESA
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69 gripe_disabled_feature ("__osmesa_print__", "Offscreen rendering");
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70 #else
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71
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72 int nargin = args.length ();
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73
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74 if (! (nargin == 1 || nargin == 3))
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75 {
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76 print_usage ();
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77 return retval;
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78 }
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79
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80 if ((nargin == 3))
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81 {
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82 if(! (args(1).is_string () && args(2).is_string ()))
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83 {
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84 error ("__osmesa_print__: FILE and TERM has to be strings");
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85 return retval;
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86 }
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87
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88 #ifndef HAVE_GL2PS_H
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89 error ("__osmesa_print__: Octave has been compiled without gl2ps");
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90 return retval;
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91 #endif
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92 }
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93
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94 int h = args(0).double_value ();
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95 graphics_object fobj = gh_manager::get_object (h);
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96 if (! (fobj && fobj.isa ("figure")))
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97 {
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98 error ("__osmesa_print__: H has to be a valid figure handle");
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99 return retval;
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100 }
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101
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102 figure::properties& fp =
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103 dynamic_cast<figure::properties&> (fobj.get_properties ());
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104
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105 bool internal = true;
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106 Matrix bb = fp.get_boundingbox (internal);
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107
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108 int Width = bb(2);
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109 int Height = bb(3);
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110
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111 OSMesaContext ctx;
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112 void *buffer;
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113
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114 // Create an RGBA-mode context, specify Z=16, stencil=0, accum=0 sizes
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115 ctx = OSMesaCreateContextExt (OSMESA_RGBA, 16, 0, 0, NULL);
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116 if (! ctx)
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117 {
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118 error ("__osmesa_print__: OSMesaCreateContext failed!\n");
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119 return retval;
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120 }
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121
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122 // Allocate the image buffer
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123 buffer = malloc (Width * Height * 4 * sizeof (GLubyte));
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124 if (! buffer)
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125 {
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126 error ("__osmesa_print__: Alloc image buffer failed!\n");
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127 return retval;
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128 }
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129
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130 // Bind the buffer to the context and make it current
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131 if (! OSMesaMakeCurrent (ctx, buffer, GL_UNSIGNED_BYTE, Width, Height))
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132 {
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133 error ("__osmesa_print__: OSMesaMakeCurrent failed!\n");
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134 return retval;
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135 }
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136
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137 // Test for a bug in OSMesa with version < 9.0
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138 // Unfortunately the macros OSMESA_MAJOR_VERSION and OSMESA_MINOR_VERSION weren't
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139 // updated between many releases and can't be used for detection therefore.
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140 // (Version 8.0 until 9.1.4 all return MAJOR 6, MINOR 5)
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141 int z, s;
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142 glGetIntegerv (GL_DEPTH_BITS, &z);
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143 glGetIntegerv (GL_STENCIL_BITS, &s);
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144 if ((z != 16) || (s != 0))
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145 error ("__osmesa_print__: Depth and stencil doesn't match,"
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146 " are you sure you are using OSMesa >= 9.0?");
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147
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148 // check if the figure is visible
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149 bool v = fp.is_visible ();
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150 if (v)
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151 fp.set_visible ("off");
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152
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153 if (nargin == 3)
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154 {
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155 // use gl2ps
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156 std::string file = args(1).string_value ();
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157 std::string term = args(2).string_value ();
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158
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159 if (! error_state)
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160 {
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161 size_t pos = file.find_first_not_of ("|");
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162 if (pos > 0)
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163 {
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164 // create process and pipe gl2ps output to it
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165 std::string cmd = file.substr (pos);
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166 gl2ps_print (fobj, cmd, term);
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167 }
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168 else
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169 {
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170 // write gl2ps output directly to file
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171 FILE *filep;
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172 filep = fopen (file.c_str (), "w");
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173 if (filep)
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174 {
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175 glps_renderer rend (filep, term);
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176 rend.draw (fobj, "");
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177
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178 // Make sure buffered commands are finished!!!
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179 glFinish ();
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180 fclose (filep);
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181 }
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182 else
59ad278cfb98 __opengl_print__.m: Use OSMesa for offscreen rendering (Bug #33180)
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183 error ("__osmesa_print__: Couldn't create file \"%s\"", file.c_str ());
59ad278cfb98 __opengl_print__.m: Use OSMesa for offscreen rendering (Bug #33180)
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184 }
19737
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185 }
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186 }
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187 else
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188 {
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189 // return RGB image
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190 opengl_renderer rend;
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191 rend.draw (fobj);
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192
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193 // Make sure buffered commands are finished!!!
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194 glFinish ();
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195
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196 dim_vector dv (4, Width, Height);
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197
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198 // FIXME: We expect that GLubyte is 1 Byte long.
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199 // Adapt code if this isn't always true
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200 assert (sizeof (GLubyte) == 1);
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201 uint8NDArray img (dv);
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202 unsigned char *p = reinterpret_cast<unsigned char*>(img.fortran_vec ());
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203 memcpy (p, buffer, (4 * Width * Height));
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204
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205 Array<octave_idx_type> perm (dim_vector (3, 1));
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206 perm(0) = 2;
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diff changeset
207 perm(1) = 1;
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diff changeset
208 perm(2) = 0;
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diff changeset
209
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diff changeset
210 Array<idx_vector> idx (dim_vector (3, 1));
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diff changeset
211
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212 // Flip Y
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213 idx(0) = idx_vector::make_range (Height - 1, -1, Height);
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214 idx(1) = idx_vector::colon;
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215
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216 // Remove alpha channel
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217 idx(2) = idx_vector (0, 3);
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218 retval = octave_value (img.permute (perm). index(idx));
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219 }
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diff changeset
220
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221 // restore visibility if necessary
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diff changeset
222 if (v)
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223 fp.set_visible ("on");
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diff changeset
224
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225 free (buffer);
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226 OSMesaDestroyContext (ctx);
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227
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228 #endif
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229 return retval;
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230 }
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231
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232 /*
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233 %!testif HAVE_OSMESA
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234 %! h = figure ("visible", "off");
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235 %! fn = tempname ();
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236 %! sombrero ();
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237 %! __osmesa_print__ (h, fn, "svg");
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238 %! assert (stat (fn).size, 2692270, -0.1);
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239 %! unlink (fn);
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240 %! img = __osmesa_print__ (h);
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241 %! assert (size (img), [get(h, "position")([4, 3]), 3])
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242 %! ## Use pixel sum per RGB channel as fingerprint
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243 %! img_fp = squeeze (sum (sum (img), 2));
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244 %! assert (img_fp, [52942515; 54167797; 56158178], -0.05);
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parents:
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245
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246 %!testif HAVE_OSMESA
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Andreas Weber <andy.weber.aw@gmail.com>
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247 %! h = figure ("visible", "off");
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
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248 %! fn = tempname ();
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
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249 %! plot (sin (0:0.1:2*pi));
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Andreas Weber <andy.weber.aw@gmail.com>
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250 %! __osmesa_print__ (h, fn, "svgis2d");
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
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251 %! assert (stat (fn).size, 7438, -0.05);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
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252 %! unlink (fn);
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Andreas Weber <andy.weber.aw@gmail.com>
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253 %! img = __osmesa_print__ (h);
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parents:
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254 %! assert (size (img), [get(h, "position")([4, 3]), 3])
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parents:
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255 %! ## Use pixel sum per RGB channel as fingerprint
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parents:
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256 %! img_fp = squeeze (sum (sum (img), 2));
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
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257 %! assert (img_fp, [59281711; 59281711; 59482179], -0.05);
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Andreas Weber <andy.weber.aw@gmail.com>
parents:
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258 */