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annotate src/gl-render.h @ 9798:2d6a5af744b6

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printing for fltk backend using gl2ps
author Shai Ayal <shaiay@users.sourceforge.net>
date Tue, 10 Nov 2009 19:48:02 -0500
parents 73153525df9a
children 92d8f35ff217
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1 /*
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2
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3 Copyright (C) 2008, 2009 Michael Goffioul
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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 */
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22
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23 #if !defined (gl_render_h)
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24 #define gl_render_h 1
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26 #ifdef HAVE_WINDOWS_H
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27 #include <windows.h>
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28 #endif
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29
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30 #ifdef HAVE_GL_GL_H
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31 #include <GL/gl.h>
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32 #elif defined HAVE_OPENGL_GL_H || defined HAVE_FRAMEWORK_OPENGL
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33 #include <OpenGL/gl.h>
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34 #endif
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35
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36 #ifdef HAVE_GL_GLU_H
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37 #include <GL/glu.h>
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38 #elif defined HAVE_OPENGL_GLU_H || defined HAVE_FRAMEWORK_OPENGL
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39 #include <OpenGL/glu.h>
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40 #endif
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41
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42 #include "graphics.h"
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43 #include "txt-eng-ft.h"
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44
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45 class
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46 OCTINTERP_API
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47 opengl_renderer
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48 {
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49 public:
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50 opengl_renderer (void) { }
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51
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52 virtual ~opengl_renderer (void) { }
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53
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54 virtual void draw (const graphics_handle& h)
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55 { draw (gh_manager::get_object (h)); }
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56
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57 virtual void draw (const graphics_object& go);
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58
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59 virtual void draw (const Matrix& hlist)
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60 {
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61 int len = hlist.length ();
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62
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63 for (int i = 0; i < len; i++)
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64 {
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65 graphics_handle h = gh_manager::lookup (hlist(i));
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66
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67 if (h.ok ())
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68 draw (h);
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69 }
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70 }
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71
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72 virtual void set_viewport (int w, int h);
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73
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74 protected:
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75 virtual void draw_figure (const figure::properties& props);
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76 virtual void draw_axes (const axes::properties& props);
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77 virtual void draw_line (const line::properties& props);
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78 virtual void draw_surface (const surface::properties& props);
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79 virtual void draw_patch (const patch::properties& props);
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80 virtual void draw_hggroup (const hggroup::properties& props);
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81 virtual void draw_text (const text::properties& props);
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82 virtual void draw_image (const image::properties& props);
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83
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84 virtual void set_color (const Matrix& c);
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85 virtual void set_polygon_offset (bool on, double offset = 0.0);
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86 virtual void set_linewidth (float w);
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87 virtual void set_linestyle (const std::string& s, bool stipple = false);
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88 virtual void set_clipbox (double x1, double x2, double y1, double y2,
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89 double z1, double z2);
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90 virtual void set_clipping (bool on);
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91 virtual void set_font (const base_properties& props);
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92
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93 virtual void init_marker (const std::string& m, double size, float width);
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94 virtual void end_marker (void);
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95 virtual void draw_marker (double x, double y, double z,
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96 const Matrix& lc, const Matrix& fc);
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97
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98 virtual Matrix render_text (const std::string& txt,
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99 double x, double y, double z,
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100 int halign, int valign, double rotation = 0.0);
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101
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102 private:
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103 opengl_renderer (const opengl_renderer&) { }
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104
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105 opengl_renderer& operator = (const opengl_renderer&)
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106 { return *this; }
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107
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108 bool is_nan_or_inf (double x, double y, double z) const
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109 {
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110 return (xisnan (x) || xisnan (y) || xisnan (z)
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111 || xisinf (x) || xisinf (y) || xisinf (z));
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112 }
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113
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114 octave_uint8 clip_code (double x, double y, double z) const
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115 {
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116 return ((x < xmin ? 1 : 0)
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117 | (x > xmax ? 1 : 0) << 1
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118 | (y < ymin ? 1 : 0) << 2
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119 | (y > ymax ? 1 : 0) << 3
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120 | (z < zmin ? 1 : 0) << 4
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121 | (z > zmax ? 1 : 0) << 5
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122 | (is_nan_or_inf (x, y, z) ? 0 : 1) << 6);
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123 }
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124
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125 unsigned int make_marker_list (const std::string& m, double size,
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126 bool filled) const;
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127
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128 private:
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129 // the backend associated with the figure being rendered
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130 graphics_backend backend;
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131
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132 // axes transformation data
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133 graphics_xform xform;
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134
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135 // axis limits in model scaled coordinate
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136 double xmin, xmax;
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137 double ymin, ymax;
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138 double zmin, zmax;
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139
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140 // Z projection limits in windows coordinate
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141 double xZ1, xZ2;
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142
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143 // call lists identifiers for markers
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144 unsigned int marker_id, filled_marker_id;
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145
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146 // camera information for primitive sorting
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147 ColumnVector camera_pos, camera_dir;
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148
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149 #if HAVE_FREETYPE
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150 // freetype render, used for text rendering
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151 ft_render text_renderer;
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152 #endif
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153
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154 private:
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155 class patch_tesselator;
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156 };
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157
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158 #endif