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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "FrameRenderer.h"
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34
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35 #include "GrayscaleFrameRenderer.h"
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36 #include "ColorFrameRenderer.h"
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37
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16
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38 #include "../../Resources/Orthanc/Core/OrthancException.h"
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0
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39
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40 namespace OrthancStone
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41 {
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42 static bool ComputePixelTransform(cairo_matrix_t& target,
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43 const SliceGeometry& viewportSlice,
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44 const SliceGeometry& frameSlice,
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45 double pixelSpacingX,
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46 double pixelSpacingY)
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47 {
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48 bool isOpposite;
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49 if (!GeometryToolbox::IsParallelOrOpposite(isOpposite, viewportSlice.GetNormal(), frameSlice.GetNormal()))
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50 {
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51 return false;
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52 }
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53 else
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54 {
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55 double x0, y0, x1, y1, x2, y2;
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56 viewportSlice.ProjectPoint(x0, y0, frameSlice.GetOrigin()
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57 - 0.5 * pixelSpacingX * frameSlice.GetAxisX()
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58 - 0.5 * pixelSpacingY * frameSlice.GetAxisY());
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59 viewportSlice.ProjectPoint(x1, y1, frameSlice.GetOrigin()
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60 + 0.5 * pixelSpacingX * frameSlice.GetAxisX()
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61 - 0.5 * pixelSpacingY * frameSlice.GetAxisY());
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62 viewportSlice.ProjectPoint(x2, y2, frameSlice.GetOrigin()
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63 - 0.5 * pixelSpacingX * frameSlice.GetAxisX()
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64 + 0.5 * pixelSpacingY * frameSlice.GetAxisY());
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65
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66 /**
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67 * Now we solve the system of linear equations Ax + b = x', given:
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68 * A [0 ; 0] + b = [x0 ; y0]
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69 * A [1 ; 0] + b = [x1 ; y1]
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70 * A [0 ; 1] + b = [x2 ; y2]
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71 * <=>
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72 * b = [x0 ; y0]
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73 * A [1 ; 0] = [x1 ; y1] - b = [x1 - x0 ; y1 - y0]
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74 * A [0 ; 1] = [x2 ; y2] - b = [x2 - x0 ; y2 - y0]
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75 * <=>
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76 * b = [x0 ; y0]
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77 * [a11 ; a21] = [x1 - x0 ; y1 - y0]
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78 * [a12 ; a22] = [x2 - x0 ; y2 - y0]
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79 **/
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80
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81 cairo_matrix_init(&target, x1 - x0, y1 - y0, x2 - x0, y2 - y0, x0, y0);
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82
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83 return true;
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84 }
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85 }
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86
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87
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88 FrameRenderer::FrameRenderer(const SliceGeometry& viewportSlice,
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89 const SliceGeometry& frameSlice,
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90 double pixelSpacingX,
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91 double pixelSpacingY,
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92 bool isFullQuality) :
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93 viewportSlice_(viewportSlice),
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94 frameSlice_(frameSlice),
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95 pixelSpacingX_(pixelSpacingX),
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96 pixelSpacingY_(pixelSpacingY),
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97 isFullQuality_(isFullQuality)
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98 {
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99 }
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100
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101
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102 bool FrameRenderer::ComputeFrameExtent(double& x1,
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103 double& y1,
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104 double& x2,
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105 double& y2,
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106 const SliceGeometry& viewportSlice,
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107 const SliceGeometry& frameSlice,
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108 unsigned int frameWidth,
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109 unsigned int frameHeight,
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110 double pixelSpacingX,
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111 double pixelSpacingY)
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112 {
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113 bool isOpposite;
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114 if (!GeometryToolbox::IsParallelOrOpposite(isOpposite, viewportSlice.GetNormal(), frameSlice.GetNormal()))
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115 {
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116 return false;
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117 }
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118 else
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119 {
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120 cairo_matrix_t transform;
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121 if (!ComputePixelTransform(transform, viewportSlice, frameSlice, pixelSpacingX, pixelSpacingY))
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122 {
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123 return true;
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124 }
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125
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126 x1 = 0;
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127 y1 = 0;
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128 cairo_matrix_transform_point(&transform, &x1, &y1);
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129
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130 x2 = frameWidth;
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131 y2 = frameHeight;
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132 cairo_matrix_transform_point(&transform, &x2, &y2);
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133
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134 if (x1 > x2)
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135 {
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136 std::swap(x1, x2);
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137 }
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138
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139 if (y1 > y2)
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140 {
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141 std::swap(y1, y2);
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142 }
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143
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144 return true;
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145 }
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146 }
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147
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148
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149 bool FrameRenderer::RenderLayer(CairoContext& context,
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150 const ViewportGeometry& view)
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151 {
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152 if (!style_.visible_)
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153 {
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154 return true;
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155 }
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156
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157 if (display_.get() == NULL)
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158 {
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159 if (!ComputePixelTransform(transform_, viewportSlice_, frameSlice_, pixelSpacingX_, pixelSpacingY_))
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160 {
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161 return true;
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162 }
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163
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164 display_.reset(GenerateDisplay(style_));
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165 }
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166
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167 assert(display_.get() != NULL);
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168
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169 cairo_t *cr = context.GetObject();
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170
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171 cairo_save(cr);
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172
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173 cairo_transform(cr, &transform_);
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174 //cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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175 cairo_set_source_surface(cr, display_->GetObject(), 0, 0);
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176
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177 switch (style_.interpolation_)
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178 {
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179 case ImageInterpolation_Nearest:
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180 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_NEAREST);
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181 break;
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182
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183 case ImageInterpolation_Linear:
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184 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_BILINEAR);
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185 break;
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186
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187 default:
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188 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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189 }
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190
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191 cairo_paint_with_alpha(cr, style_.alpha_);
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192
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193 if (style_.drawGrid_)
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194 {
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195 context.SetSourceColor(style_.drawColor_);
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196 cairo_set_line_width(cr, 0.5 / view.GetZoom());
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197
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198 for (unsigned int x = 0; x <= display_->GetWidth(); x++)
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199 {
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200 cairo_move_to(cr, x, 0);
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201 cairo_line_to(cr, x, display_->GetHeight());
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202 }
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203
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204 for (unsigned int y = 0; y <= display_->GetHeight(); y++)
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205 {
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206 cairo_move_to(cr, 0, y);
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207 cairo_line_to(cr, display_->GetWidth(), y);
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208 }
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209
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210 cairo_stroke(cr);
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211 }
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212
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213 cairo_restore(cr);
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214
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215 return true;
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216 }
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217
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218
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219 void FrameRenderer::SetLayerStyle(const RenderStyle& style)
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220 {
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221 style_ = style;
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222 display_.reset(NULL);
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223 }
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224
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225
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226 ILayerRenderer* FrameRenderer::CreateRenderer(Orthanc::ImageAccessor* frame,
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227 const SliceGeometry& viewportSlice,
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228 const SliceGeometry& frameSlice,
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229 const DicomDataset& dicom,
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230 double pixelSpacingX,
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231 double pixelSpacingY,
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232 bool isFullQuality)
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233 {
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234 std::auto_ptr<Orthanc::ImageAccessor> protect(frame);
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235
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236 if (frame->GetFormat() == Orthanc::PixelFormat_RGB24)
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237 {
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238 return new ColorFrameRenderer(protect.release(), viewportSlice, frameSlice,
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239 pixelSpacingX, pixelSpacingY, isFullQuality);
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240 }
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241 else
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242 {
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243 DicomFrameConverter converter;
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244 converter.ReadParameters(dicom);
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245 return new GrayscaleFrameRenderer(protect.release(), converter, viewportSlice, frameSlice,
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246 pixelSpacingX, pixelSpacingY, isFullQuality);
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247 }
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248 }
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249 }
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