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annotate engine/core/view/rendererbase.h @ 308:af0b233e246f

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- added a workaround for the rotation issue of groundtiles in rio de hola maps
author chewie@33b003aa-7bff-0310-803a-e67f0ece8222
date Tue, 11 Aug 2009 17:08:21 +0000
parents 44919eb74c40
children f855809822cf
rev   line source
0
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1 /***************************************************************************
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2 * Copyright (C) 2005-2008 by the FIFE team *
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3 * http://www.fifengine.de *
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4 * This file is part of FIFE. *
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5 * *
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6 * FIFE is free software; you can redistribute it and/or *
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7 * modify it under the terms of the GNU Lesser General Public *
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8 * License as published by the Free Software Foundation; either *
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9 * version 2.1 of the License, or (at your option) any later version. *
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10 * *
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11 * This library is distributed in the hope that it will be useful, *
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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14 * Lesser General Public License for more details. *
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15 * *
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16 * You should have received a copy of the GNU Lesser General Public *
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17 * License along with this library; if not, write to the *
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18 * Free Software Foundation, Inc., *
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19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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20 ***************************************************************************/
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21
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22 #ifndef FIFE_RENDERERBASE_H
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23 #define FIFE_RENDERERBASE_H
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24
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25 // Standard C++ library includes
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26 #include <list>
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27 #include <vector>
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28
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29 // 3rd party library includes
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30
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31 // FIFE includes
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32 // These includes are split up in two parts, separated by one empty line
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33 // First block: files included from the FIFE root src directory
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34 // Second block: files included from the same folder
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35
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36 namespace FIFE {
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37 class Camera;
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38 class Layer;
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39 class Map;
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40 class Instance;
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41 class RenderBackend;
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42
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43 class RendererBase;
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44 /** RendererListener allows reaction to changes in renderer
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45 * Having this implemented via callback mechanism should speed up the rendering a bit
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46 * (e.g. no need to sort pipeline order per each frame)
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47 */
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48 class IRendererListener {
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49 public:
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50 virtual ~IRendererListener() {}
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51
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52 /** Renderer's pipeline position has been changed
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53 */
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54 virtual void onRendererPipelinePositionChanged(RendererBase* renderer) = 0;
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55
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56 /** Renderer is enabled / disabled
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57 */
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58 virtual void onRendererEnabledChanged(RendererBase* renderer) = 0;
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59 };
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60
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61 /** Interface to class owning the renderers
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62 * Used to get correct subclass of renderer in scripting side (via renderer's static method)
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63 */
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64 class IRendererContainer {
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65 public:
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66 virtual ~IRendererContainer() {}
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67
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68 /** Returns renderer with given name
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69 */
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70 virtual RendererBase* getRenderer(const std::string& renderername) = 0;
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71 };
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72
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73 /** Base class for all view renderers
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74 * View renderer renders one aspect of the view shown on screen
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75 */
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76 class RendererBase {
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77 public:
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78 /** Constructor
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79 * @param renderbackend to use
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80 * @param position position for this renderer in rendering pipeline
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81 */
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82 RendererBase(RenderBackend* renderbackend, int position);
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83
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84 /** Copy Constructor
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85 */
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86 RendererBase(const RendererBase& old);
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87
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88 /** Makes copy of this renderer
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89 */
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90 virtual RendererBase* clone() = 0;
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91
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92 /** Destructor
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93 */
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94 virtual ~RendererBase() {};
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95
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96 /** This method is called by the view to ask renderer to draw its rendering aspect based on
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97 * given parameters. Renderers receive non-clipped instance stack since there is no
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98 * way to know which information is relevant for the renderer. E.g. effect renderer
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99 * might need to know offscreen instance locations to be able to draw radiation coming from
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100 * some instance not visible on the screen.
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101 *
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102 * @param cam camera view to draw
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103 * @param layer current layer to be rendered
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104 * @param instances instances on the current layer
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105 * @ see setPipelinePosition
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106 */
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107 virtual void render(Camera* cam, Layer* layer, std::vector<Instance*>& instances) = 0;
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108
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109 /** Name of the renderer
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110 */
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111 virtual std::string getName() = 0;
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112
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113 /** Gets renderer position in the rendering pipeline
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114 */
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115 int getPipelinePosition() const { return m_pipeline_position; }
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116
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117 /** Sets renderer position in the rendering pipeline
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118 * Pipeline position defines in which order view calls the renderers when update occurs
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119 * Note that renderers are called once per rendered layer, thus to update the
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120 * whole screen, renderer might receive multiple calls
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121 */
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122 void setPipelinePosition(int position);
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123
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124 /** Enables renderer
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125 */
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126 virtual void setEnabled(bool enabled);
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127
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128 /** Resets information in the renderer
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129 */
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130 virtual void reset() {}
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131
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132 /** Is renderer enabled
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133 */
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134 bool isEnabled() const { return m_enabled; }
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135
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136 /** Sets listener for renderer
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137 */
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138 void setRendererListener(IRendererListener* listener) { m_listener = listener; }
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139
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140 /** Adds active layer to renderer. Only active layers are rendered
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141 */
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142 void addActiveLayer(Layer* layer);
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143
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144 /** Removes active layer from renderer.
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145 */
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146 void removeActiveLayer(Layer* layer);
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147
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148 /** Clears all active layers from renderer
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149 */
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150 void clearActiveLayers();
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151
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152 /** Activates all layers from given elevation
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153 */
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154 void activateAllLayers(Map* elevation);
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155
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156 /** Returns if given layer is currently activated
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157 */
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158 bool isActivedLayer(Layer* layer);
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159
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160
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161 protected:
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162 RendererBase();
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163
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164 std::list<Layer*> m_active_layers;
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165 RenderBackend* m_renderbackend;
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166
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167 private:
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168 bool m_enabled;
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169 int m_pipeline_position;
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170 IRendererListener* m_listener;
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171 };
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172 }
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173
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174 #endif