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annotate engine/core/video/animation.h @ 150:6e7d228def30

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Lazy loading for animations. Uses a Resource-Pointer class that behaves like a pointer to an IResource, but only loads the resource on demand. There's a slight change of API, which is already adapted to in the XML loaders. If you use Animation.addFrame directly, either adapt to the change or wait a few hours for a backwards compatibility solution.
author phoku@33b003aa-7bff-0310-803a-e67f0ece8222
date Sat, 11 Oct 2008 12:03:59 +0000
parents 90005975cdbb
children 3804348fe3fb
rev   line source
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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_VIDEO_ANIMATION_H
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23 #define FIFE_VIDEO_ANIMATION_H
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24
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25 // Standard C++ library includes
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26 #include <cassert>
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27 #include <map>
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28 #include <vector>
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29
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30 // Platform specific includes
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31 #include "util/base/fife_stdint.h"
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32
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33 // 3rd party library includes
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34
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35 // FIFE includes
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36 // These includes are split up in two parts, separated by one empty line
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37 // First block: files included from the FIFE root src directory
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38 // Second block: files included from the same folder
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39 #include "util/base/resourceclass.h"
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40 #include "util/resource/resource_ptr.h"
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41
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42 namespace FIFE {
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43
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44 class Image;
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45
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46 /** Animation.
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47 *
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48 * A container of Images describing an animation. Animation itself does
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49 * not take care of animating the images. Instead it contains images
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50 * having associated timestamps. It is the responsibility of the
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51 * animation user to query frames based on current timestamp and show
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52 * returned images on screen.
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53 */
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54 class Animation : public ResourceClass {
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55 public:
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56 /** Constructor.
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57 */
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58 explicit Animation();
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59
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60 /** Destructor. Decreases the reference count of all referred images.
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61 */
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62 ~Animation();
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63
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64 //TODO: fill in these stubs! Note, m_location is not properly initialized.
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65 virtual const ResourceLocation& getResourceLocation() { return m_location; }
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66
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67 virtual void setResourceLocation(const ResourceLocation& location) { }
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68 virtual void setResourceFile(const std::string& filename) { }
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69
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70 /** Adds new frame into animation
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71 * Frames must be added starting from first frame. Increases the reference
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72 * count of the given image.
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73 * @param image Pointer to Image. Does not transfer the ownership
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74 * @param duration Duration for given frame in the animation
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75 */
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76 void addFrame(ResourcePtr image, unsigned int duration);
0
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77
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78 /** Get the frame index that matches given timestamp. In case there is no exact match,
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79 * correct frame is calculated. E.g. if there are frames for timestamps 50 and 100
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80 * and frame for 75 is asked, frame associated with value 50 is given back.
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81 * In case the timestamp is past the sequence, negative value is returned
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82 * @see addFrame
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83 */
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84 int getFrameIndex(unsigned int timestamp);
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85
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86 /** Gets the frame that matches the given index. If no matches found, returns NULL
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87 */
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88 Image* getFrame(int index);
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89
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90 /** Gets the frame that matches the given timestamp.
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91 */
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92 Image* getFrameByTimestamp(unsigned int timestamp);
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93
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94 /** Gets the frame duration for given (indexed) frame. Returns negative value in case
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95 * of incorrect index
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96 */
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97 int getFrameDuration(int index);
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98
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99 /** Get the number of frames
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100 */
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101 unsigned int getNumFrames() const;
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102
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103 /** Sets the action frame. Action frame is the frame when the related
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104 * action actually happens. E.g. in case of punch animation, action frame is
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105 * the frame when punch hits the target. In case there is no associated
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106 * action frame, value is negative
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107 * @param num index of the action frame.
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108 */
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109 void setActionFrame(int num) { m_action_frame = num; }
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110
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111 /** Gets the action frame.
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112 * @see setActionFrame
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113 */
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114 int getActionFrame() { return m_action_frame; }
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115
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116 /** Animation direction tells how this animation is associated
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117 * with movement when played starting from frame 0
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118 * E.g. in walking animation there should be direction assigned so
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119 * that engine can choose the correct animation when characters are
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120 * moved around the map area
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121 * @param direction direction to set
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122 */
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123 void setDirection(unsigned int direction);
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124
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125 /** Gets the animation direction
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126 * @see setDirection
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127 * @return direction for this animation
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128 */
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129 unsigned int getDirection() { return m_direction; }
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130
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131 /** Gets the total duration for the whole animation
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132 */
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133 int getDuration() { return m_animation_endtime; }
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134
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135 private:
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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136 /** Contains information about one animation frame (duration + frame index + frame pointer)
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137 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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138 struct FrameInfo {
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139 unsigned int index;
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140 unsigned int duration;
150
6e7d228def30 Lazy loading for animations.
phoku@33b003aa-7bff-0310-803a-e67f0ece8222
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141 ResourcePtr image;
0
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142 };
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143
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144 ResourceLocation m_location;
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145
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146 /** Checks for animation frame index overflows
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147 */
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148 bool isValidIndex(int index);
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149
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150 // Map of timestamp + associated frame
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151 std::map<unsigned int, FrameInfo> m_framemap;
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152 // vector of frames for fast indexed access
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153 std::vector<FrameInfo> m_frames;
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154 // Action frame of the Animation.
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155 int m_action_frame;
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156 // time when animation ends (zero based)
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157 int m_animation_endtime;
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158 // Direction for this animation
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159 unsigned int m_direction;
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160
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161 };
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162 }
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163
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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164 #endif
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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165 /* vim: set noexpandtab: set shiftwidth=2: set tabstop=2: */