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annotate engine/core/video/renderbackend.h @ 61:18c2a21ac0ad

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allow clients to set a custom window title and icon
author spq@33b003aa-7bff-0310-803a-e67f0ece8222
date Wed, 16 Jul 2008 12:37:41 +0000
parents 90005975cdbb
children ad7969d9460b
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_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 */
61
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89 virtual Image* createMainScreen(unsigned int width, unsigned int height, unsigned char bitsPerPixel, bool fullscreen, const std::string& title, const std::string& icon) = 0;
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