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annotate libgui/graphics/gl-select.cc @ 19629:be7ac98fab43 gui-release

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strip trailing whitespace from most source files * NEWS, etc/NEWS.3, libgui/graphics/Backend.h, libgui/graphics/ButtonControl.h, libgui/graphics/EditControl.cc, libgui/graphics/Object.h, libgui/graphics/QtHandlesUtils.cc, libgui/graphics/ToolBarButton.h, libgui/graphics/__init_qt__.cc, libgui/graphics/gl-select.cc, libgui/qterminal/libqterminal/unix/TerminalView.cpp, libgui/qterminal/libqterminal/unix/TerminalView.h, libgui/qterminal/libqterminal/win32/QWinTerminalImpl.cpp, libgui/src/m-editor/file-editor-tab.cc, libgui/src/m-editor/file-editor.cc, libgui/src/m-editor/file-editor.h, libgui/src/m-editor/octave-qscintilla.cc, libgui/src/settings-dialog.cc, libgui/src/shortcut-manager.cc, libgui/src/workspace-view.cc, libinterp/corefcn/graphics.cc, libinterp/corefcn/input.cc, libinterp/parse-tree/pt-unop.cc, liboctave/array/dSparse.h, scripts/pkg/pkg.m, scripts/polynomial/polyeig.m, test/io.tst: Strip trailing whitespace.
author John W. Eaton <jwe@octave.org>
date Tue, 20 Jan 2015 09:43:29 -0500
parents 92f91183630b
children 17d647821d61
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rev   line source
18498
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1 /*
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2
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3 Copyright (C) 2011-2014 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 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "gl-select.h"
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28
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29 #include <iostream>
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30
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31 void
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32 opengl_selector::apply_pick_matrix (void)
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33 {
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34 GLdouble p_matrix[16];
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35 GLint viewport[4];
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36
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37 glGetDoublev (GL_PROJECTION_MATRIX, p_matrix);
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38 glGetIntegerv (GL_VIEWPORT, viewport);
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39 glMatrixMode (GL_PROJECTION);
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40 glLoadIdentity ();
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41 gluPickMatrix (xp, yp, size, size, viewport);
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42 glMultMatrixd (p_matrix);
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43 glMatrixMode (GL_MODELVIEW);
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44 }
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45
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46 void
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47 opengl_selector::setup_opengl_transformation (const axes::properties& props)
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48 {
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49 opengl_renderer::setup_opengl_transformation (props);
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50 apply_pick_matrix ();
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51 }
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52
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53 void
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54 opengl_selector::init_marker (const std::string& m, double sz, float width)
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55 {
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56 opengl_renderer::init_marker (m, sz, width);
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57 apply_pick_matrix ();
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58 }
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59
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60 # define BUFFER_SIZE 128
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61
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62 graphics_object
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63 opengl_selector::select (const graphics_object& ax, int x, int y, int flags)
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64 {
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65 glEnable (GL_DEPTH_TEST);
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66 glDepthFunc (GL_LEQUAL);
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67
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68 xp = x;
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69 yp = y;
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70
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71 GLuint select_buffer[BUFFER_SIZE];
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72
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73 glSelectBuffer (BUFFER_SIZE, select_buffer);
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74 glRenderMode (GL_SELECT);
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75 glInitNames ();
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76
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77 object_map.clear ();
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78
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79 draw (ax);
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80
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81 int hits = glRenderMode (GL_RENDER);
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82 graphics_object obj;
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83
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84 if (hits > 0)
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85 {
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86 GLuint current_minZ = 0xffffffff;
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87 GLuint current_name = 0xffffffff;
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88
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89 for (int i = 0, j = 0; i < hits && j < BUFFER_SIZE-3; i++)
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90 {
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91 GLuint n = select_buffer[j++],
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92 minZ = select_buffer[j++];
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93
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94 j++; // skip maxZ
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95 if (((flags & select_last) == 0 && (minZ <= current_minZ)) ||
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96 ((flags & select_last) != 0 && (minZ >= current_minZ)))
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97 {
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98 bool candidate = true;
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99 GLuint name =
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100 select_buffer[std::min (j + n, GLuint (BUFFER_SIZE)) - 1];
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101
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102 if ((flags & select_ignore_hittest) == 0)
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103 {
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104 graphics_object go = object_map[name];
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105
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106 if (! go.get_properties ().is_hittest ())
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107 candidate = false;
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108 }
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109
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110 if (candidate)
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111 {
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112 current_minZ = minZ;
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113 current_name = name;
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114 }
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115
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116 j += n;
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117 }
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118 else
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119 j += n;
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120 }
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121
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122 if (current_name != 0xffffffff)
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123 obj = object_map[current_name];
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124 }
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125 else if (hits < 0)
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126 warning ("opengl_selector::select: selection buffer overflow");
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127
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128 object_map.clear ();
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129
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130 return obj;
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131 }
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132
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133 void
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134 opengl_selector::draw (const graphics_object& go, bool toplevel)
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135 {
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136 GLuint name = object_map.size ();
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137
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138 object_map[name] = go;
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139 glPushName (name);
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140 opengl_renderer::draw (go, toplevel);
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141 glPopName ();
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142 }
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143
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144 void
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145 opengl_selector::fake_text (double x, double y, double z, const Matrix& bbox,
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146 bool use_scale)
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147 {
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148 ColumnVector xpos, xp1, xp2;
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149
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150 xpos = get_transform ().transform (x, y, z, use_scale);
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151
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152 xp1 = xp2 = xpos;
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153 xp1(0) += bbox(0);
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154 xp1(1) -= bbox(1);
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155 xp2(0) += (bbox(0) + bbox(2));
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156 xp2(1) -= (bbox(1) + bbox(3));
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157
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158 ColumnVector p1, p2, p3, p4;
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159
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160 p1 = get_transform ().untransform (xp1(0), xp1(1), xp1(2), false);
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161 p2 = get_transform ().untransform (xp2(0), xp1(1), xp1(2), false);
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162 p3 = get_transform ().untransform (xp2(0), xp2(1), xp1(2), false);
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163 p4 = get_transform ().untransform (xp1(0), xp2(1), xp1(2), false);
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164
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165 glBegin (GL_QUADS);
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166 glVertex3dv (p1.data ());
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167 glVertex3dv (p2.data ());
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168 glVertex3dv (p3.data ());
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169 glVertex3dv (p4.data ());
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170 glEnd ();
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171 }
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172
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173 void
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174 opengl_selector::draw_text (const text::properties& props)
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175 {
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176 if (props.get_string ().is_empty ())
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177 return;
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178
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179 Matrix pos = props.get_data_position ();
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180 const Matrix bbox = props.get_extent_matrix ();
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181
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182 fake_text (pos(0), pos(1), pos.numel () > 2 ? pos(2) : 0.0, bbox);
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183 }
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184
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185 Matrix
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186 opengl_selector::render_text (const std::string& txt,
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187 double x, double y, double z,
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188 int halign, int valign, double rotation)
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189 {
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190 #if HAVE_FREETYPE
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191 uint8NDArray pixels;
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192 Matrix bbox;
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193
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194 // FIXME: probably more efficient to only compute bbox instead
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195 // of doing full text rendering...
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196 text_to_pixels (txt, pixels, bbox, halign, valign, rotation);
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197 fake_text (x, y, z, bbox, false);
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198
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199 return bbox;
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200 #else
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201 return Matrix (1, 4, 0.0);
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202 #endif
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203 }