Mercurial > projects > mde
annotate mde/setup/Screen.d @ 85:56c0ddd90193
Intermediate commit (not stable). Changes to init system.
author | Diggory Hardy <diggory.hardy@gmail.com> |
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date | Thu, 11 Sep 2008 11:33:51 +0100 |
parents | mde/setup/sdl.d@ea58f277f487 |
children | 79d816b3e2d2 |
rev | line source |
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1 /* LICENSE BLOCK |
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2 Part of mde: a Modular D game-oriented Engine |
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3 Copyright © 2007-2008 Diggory Hardy |
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4 |
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5 This program is free software: you can redistribute it and/or modify it under the terms |
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6 of the GNU General Public License as published by the Free Software Foundation, either |
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7 version 2 of the License, or (at your option) any later version. |
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8 |
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9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; |
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10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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11 See the GNU General Public License for more details. |
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12 |
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13 You should have received a copy of the GNU General Public License |
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14 along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
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15 |
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16 /** Screen: SDL & OpenGL setup/cleanup, drawing. |
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17 * |
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18 * Has an interface by which other code can hook in for drawing and resize notifications. */ |
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19 module mde.setup.Screen; |
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20 |
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21 import mde.setup.exception; |
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22 import mde.lookup.Options; |
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23 import imde = mde.imde; |
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24 debug (drawGlyphCache) import mde.font.font; |
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25 |
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26 import tango.util.log.Log : Log, Logger; |
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27 import tango.stdc.stringz; |
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28 import tango.time.Time; // TimeSpan (type only; unused) |
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29 |
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30 import derelict.sdl.sdl; |
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31 import derelict.opengl.gl; // for loading a later gl version |
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32 import derelict.util.exception; |
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33 |
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34 /** Currently just used as a namespace. Potential for multiple screen support later? */ |
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35 struct Screen { |
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36 // TYPES (these mustn't be static): |
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37 /** Interface for anything hooking into the screen for drawing, etc. */ |
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38 interface Drawable { |
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39 /** Called on window creation and whenever the window manager resizes the window, before |
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40 * the new size is set. The new size is passed. |
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41 * |
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42 * The parameters were passed as ref to allow the called function to change them, but SDL |
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43 * didn't appear able to resize the window (on X11), so this was dropped. */ |
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44 void sizeEvent (int w, int h); |
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45 |
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46 /** Called you guess when :-) */ |
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47 void draw (); |
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48 } |
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49 |
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50 /** All video options. */ |
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51 class OptionsVideo : Options { |
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52 mixin (impl!("bool fullscreen,hardware,resizable,noFrame; int screenW,screenH,windowW,windowH;")); |
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53 } |
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54 |
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55 static: |
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56 /** Init function to initialize SDL. */ |
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57 StageState init () { // init func |
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58 // Initialise SDL |
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59 if (SDL_Init (SDL_INIT_VIDEO | SDL_INIT_JOYSTICK /+| SDL_INIT_EVENTTHREAD+/)) { |
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60 logger.fatal ("SDL initialisation failed:"); |
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61 char* msg = SDL_GetError (); |
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62 logger.fatal (msg ? fromStringz(msg) : "no reason available"); |
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63 |
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64 throw new InitException ("SDL Initialization failed"); |
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65 } |
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66 debug logger.trace ("SDL initialised"); |
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67 return StageState.ACTIVE; |
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68 } |
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69 /** SDL shutdown */ |
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70 StageState cleanup () { |
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71 SDL_Quit(); |
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72 return StageState.INACTIVE; |
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73 } |
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74 /** Init function to set up a window with OpenGL support. */ |
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75 StageState initWindow () { |
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76 //BEGIN Create window and initialize OpenGL |
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77 // Window creation flags and size |
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78 flags = SDL_OPENGL; |
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79 if (vidOpts.hardware) flags |= SDL_HWSURFACE | SDL_DOUBLEBUF; |
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80 else flags |= SDL_SWSURFACE; |
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81 int w, h; |
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82 if (vidOpts.fullscreen) { |
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83 flags |= SDL_FULLSCREEN; |
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84 w = vidOpts.screenW; |
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85 h = vidOpts.screenH; |
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86 } |
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87 else { |
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88 if (vidOpts.resizable) flags |= SDL_RESIZABLE; |
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89 if (vidOpts.noFrame) flags |= SDL_NOFRAME; |
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90 w = vidOpts.windowW; |
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91 h = vidOpts.windowH; |
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92 } |
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93 |
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94 // OpenGL attributes |
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95 SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5); |
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96 SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 6); |
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97 SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5); |
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98 SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16); |
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99 SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER,1); |
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100 |
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101 // Open a window |
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102 debug logger.trace ("Opening a window (this can crash if the libraries are messed up)"); |
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103 if (setWindow (w, h)) { |
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104 throw new InitException ("Failed to open a window"); |
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105 } |
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106 |
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107 /* Now (must be done after GL context is created) we can try to load later version. |
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108 * The initial loading provides opengl 1.1 features. |
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109 * |
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110 * 1.4 is now used for glBlendColor (coloured text). |
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111 * |
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112 * Currently the latest version used is 1.3; adjust this as necessary. However, before using |
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113 * features from any OpenGL version > 1.1 a check must be made on what was loaded by calling |
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114 * DerelictGL.availableVersion(). Note that availableVersion() could be used instead to load |
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115 * the highest supported version but this way we know what we're getting. */ |
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116 if (DerelictGL.availableVersion < GLVersion.Version13) { |
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117 throw new InitException ("Required at least OpenGL 1.3; didn't get this."); |
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118 } |
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119 /+try { |
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120 DerelictGL.loadVersions(GLVersion.Version14); |
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121 } catch (SharedLibProcLoadException e) { |
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122 logger.warn ("Loading OpenGL version 1.4 failed:"); |
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123 logger.warn (e.msg); |
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124 |
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125 setInitFailure (); |
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126 return; |
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127 }+/ |
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128 |
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129 // OpenGL stuff: |
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130 glDisable(GL_LIGHTING); |
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131 glDisable(GL_DEPTH_TEST); |
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132 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); |
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133 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); |
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134 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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135 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
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136 glEnable(GL_TEXTURE_2D); |
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137 glShadeModel(GL_SMOOTH); |
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138 |
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139 glClearColor (0.0f, 0.0f, 0.0f, 0.0f); |
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140 |
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141 glMatrixMode(GL_MODELVIEW); |
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142 glLoadIdentity(); |
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143 |
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144 // Used for font rendering: |
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145 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
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146 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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147 //NOTE: wrap mode may have an effect, but shouldn't be noticed... |
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148 |
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149 // Window-manager settings |
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150 SDL_WM_SetCaption (toStringz ("mde"), null); |
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151 // SDL_WM_GrabInput (use later) |
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152 //END Create window and initialize OpenGL |
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153 return StageState.ACTIVE; |
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154 } |
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155 |
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156 |
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157 /** Called when a resize event occurs (when the window manager resizes the window). */ |
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158 void resizeEvent (int w, int h) { |
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159 // Save new size to config |
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160 if (vidOpts.fullscreen) { // probably resizeEvent only called when not fullscreen |
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161 vidOpts.set!(int) ("screenW", w); |
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162 vidOpts.set!(int) ("screenH", h); |
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163 } else { |
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164 vidOpts.set!(int) ("windowW", w); |
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165 vidOpts.set!(int) ("windowH", h); |
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166 } |
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167 |
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168 if (setWindow (w,h)) |
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169 imde.run = false; |
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170 } |
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171 |
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172 /** Add a drawable element to the screen (see Drawable interface). |
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173 * |
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174 * Should be called before Init to get initial size. Currently no means to remove drawables, |
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175 * and not really designed for more than one. */ |
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176 void addDrawable (Drawable d) { |
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177 drawables ~= d; |
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178 } |
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179 |
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180 /** Drawing function */ |
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181 void draw (TimeSpan) { |
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182 glClear(GL_COLOR_BUFFER_BIT); |
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183 |
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184 foreach (Drawable d; drawables) |
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185 d.draw; |
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186 |
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187 debug (drawGlyphCache) { |
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188 logger.trace ("Drawing font texture"); |
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189 FontStyle.drawTexture; |
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190 } |
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191 |
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192 // Error check: |
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193 GLenum err = glGetError(); |
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194 while (err != GL_NO_ERROR) { |
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195 logger.error ("GL error: {}", err); |
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196 err = glGetError(); |
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197 } |
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198 |
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199 glFinish(); // Use Finish rather than Flush to make sure gl is ready to swap buffers |
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200 SDL_GL_SwapBuffers(); |
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201 } |
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202 |
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203 /** Set a new window size. Returns true on failure due to the different ways this must be |
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204 * handled. */ |
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205 private bool setWindow (int w, int h) { |
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206 foreach (d; drawables) // Tell all drawables the new window size. |
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207 d.sizeEvent (w,h); |
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208 |
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209 debug logger.trace ("Setting video mode {}x{}, 32-bit, flags: {}", w,h,flags); |
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210 if (SDL_SetVideoMode (w, h, 32, flags) is null) { |
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211 logger.fatal ("Unable to set video mode:"); |
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212 char* msg = SDL_GetError (); |
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213 logger.fatal (msg ? fromStringz(msg) : "no reason available"); |
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214 |
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215 // Print a load of info: |
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216 logger.info ("Available video modes:"); |
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217 SDL_Rect** modes = SDL_ListModes (null, SDL_FULLSCREEN); |
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218 if (modes is null) logger.info ("None!"); |
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219 else if (modes is cast(SDL_Rect**) -1) logger.info ("All modes are available"); |
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220 else { |
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221 for (uint i = 0; modes[i] !is null; ++i) { |
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222 logger.info ("\t{}x{}", modes[i].w, modes[i].h); |
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223 } |
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224 } |
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225 |
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226 SDL_VideoInfo* vi = SDL_GetVideoInfo (); |
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227 if (vi !is null) { |
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228 logger.info ("Video info:"); |
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229 logger.info ("Hardware surface support: "~ (vi.flags & SDL_HWSURFACE ? "yes" : "no")); |
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230 logger.info ("Video memory: {}", vi.video_mem); |
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231 |
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232 if (vi.vfmt !is null) { |
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233 logger.info ("Best video mode:"); |
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234 logger.info ("Bits per pixel: {}", vi.vfmt.BitsPerPixel); |
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235 } |
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236 } |
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237 |
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238 return true; |
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239 } |
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240 |
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241 // Reset the projection and viewport |
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242 glMatrixMode (GL_PROJECTION); |
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243 glLoadIdentity (); |
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244 |
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245 glViewport (0,0,w,h); |
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246 |
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247 // Make the top-left the origin (see gui/GUI notes.txt): |
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248 // Note that this only affects vertex operations − direct rasterisation operations are |
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249 // unaffected! |
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250 glOrtho (0.0,w, h,0.0, -1.0, 1.0); |
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251 |
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252 glMatrixMode(GL_MODELVIEW); |
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253 return false; |
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254 } |
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255 |
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256 static this() { |
85
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257 logger = Log.getLogger ("mde.setup.Screen"); |
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258 |
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259 vidOpts = new OptionsVideo; |
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260 Options.addOptionsClass (vidOpts, "video"); |
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261 } |
85
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262 |
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263 // DATA: |
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264 private: |
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265 uint flags = 0; |
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266 Drawable[] drawables; |
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267 Logger logger; |
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268 OptionsVideo vidOpts; |
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269 } |