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annotate engine/core/video/renderbackend.h @ 2:e84dccee1bb7

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* add myself to authors * fix missing break in guimanager * when an event occurs over an guichan window the event is marked as consumedByGuichan, but the event is still distributed to all event listeners, those can check via event.isConsumedByGuichan...
author spq@33b003aa-7bff-0310-803a-e67f0ece8222
date Tue, 01 Jul 2008 17:43:35 +0000
parents 4a0efb7baf70
children 90005975cdbb
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 modify *
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7 * it under the terms of the GNU General Public License as published by *
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8 * the Free Software Foundation; either version 2 of the License, or *
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9 * (at your option) any later version. *
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10 * *
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11 * This program 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 *
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14 * GNU 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 General Public License *
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17 * along with this program; if not, write to the *
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18 * Free Software Foundation, Inc., *
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19 * 51 Franklin St, 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_RENDERBACKEND_H
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23 #define FIFE_VIDEO_RENDERBACKEND_H
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24
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25 // Standard C++ library includes
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26 #include <string>
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27
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28 // Platform specific includes
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29 #include "util/base/fife_stdint.h"
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30
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31 // 3rd party library includes
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32 #include <SDL.h>
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33 #include <SDL_video.h>
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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/singleton.h"
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40 #include "util/structures/point.h"
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41 #include "util/structures/rect.h"
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42
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43 #include "image.h"
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44
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45 namespace FIFE {
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46
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47 class Image;
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48
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49 /** Abstract interface for all the renderbackends. */
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50 class RenderBackend: public AbstractImage, public DynamicSingleton<RenderBackend> {
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51 public:
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52 /** Constructor.
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53 * @param name The name of the new renderbackend.
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54 */
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55 RenderBackend();
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56
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57 /** Destructor.
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58 */
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59 virtual ~RenderBackend();
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60
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61 /** The name of the renderbackend.
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62 * @return The name of this renderbackend.
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63 */
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64 virtual const std::string& getName() const = 0;
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65
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66 /** Called when a new frame starts.
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67 */
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68 virtual void startFrame() = 0;
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69
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70 /** Called when a frame is finished and ready to be displayed.
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71 */
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72 virtual void endFrame() = 0;
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73
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74 /** Initializes the backend.
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75 */
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76 virtual void init() = 0;
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77
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78 /** Performs cleanup actions.
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79 */
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80 virtual void deinit();
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81
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82 /** Creates the mainscreen (the display window).
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83 * @param width Width of the window.
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84 * @param height Height of the window.
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85 * @param bitsPerPixel Bits per pixel, 0 means autodetect.
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86 * @param fullscreen Use fullscreen mode?
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87 * @return The new Screen Image
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88 */
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89 virtual Image* createMainScreen(unsigned int width, unsigned int height, unsigned char bitsPerPixel, bool fullscreen) = 0;
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90
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91 /** Creates an Image suitable for this renderbackend.
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92 * @param data Pointer to the imagedata (needs to be in RGBA, 8 bits per channel).
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93 * @param width Width of the image.
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94 * @param height Height of the image.
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95 * @return The new Image.
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96 */
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97 virtual Image* createImage(const uint8_t* data, unsigned int width, unsigned int height) = 0;
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98
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99 /** Helper function to create images from SDL_Surfaces.
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100 * Takes ownership over the surface.
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101 * @param surface The surface to convert.
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102 * @return The new Image.
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103 */
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104 virtual Image* createImage(SDL_Surface* surface) = 0;
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105
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106 /** Returns a pointer to the main screen Image
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107 * @return A pointer to the main screen Image, or 0 if no mainscreen exists.
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108 */
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109 Image* getScreenImage() const { return m_screen; };
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110
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111 /** Creates a Screenshot and saves it to a file.
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112 */
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113 void captureScreen(const std::string& filename);
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114
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115 SDL_Surface* getSurface();
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116 unsigned int getWidth() const;
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117 unsigned int getHeight() const;
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118 unsigned int getScreenWidth() const { return getWidth(); }
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119 unsigned int getScreenHeight() const { return getHeight(); }
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120 const Rect& getArea();
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121 void getPixelRGBA(int x, int y, uint8_t* r, uint8_t* g, uint8_t* b, uint8_t* a);
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122 void pushClipArea(const Rect& cliparea, bool clear=true);
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123 void popClipArea();
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124 const Rect& getClipArea() const;
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125 void setAlphaOptimizerEnabled(bool enabled);
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126 bool isAlphaOptimizerEnabled();
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127 void saveImage(const std::string& filename);
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128
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129 /** OpenGL image needs to be sliced into power of two sized chunks.
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130 * You can adjust the size by calling this method.
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131 * Size can be anything (reasonable), it is always changed to the next biggest power of two value
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132 * @example values 50 -> 64, 340 -> 512
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133 */
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134 void setChunkingSize(unsigned int size);
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135 unsigned int getChunkingSize();
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136
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137 protected:
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138 Image* m_screen;
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139 bool m_isalphaoptimized;
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140 unsigned int m_chunkingsize;
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141 };
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142 }
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143
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144 #endif