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annotate mde/setup/Screen.d @ 98:49e7cfed4b34

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All types of Option have been converted to use ValueContent classes, and their values can be displayed.
author Diggory Hardy <diggory.hardy@gmail.com>
date Wed, 12 Nov 2008 13:18:51 +0000
parents 30470bc19ca4
children ee209602770d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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;
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32 import derelict.util.exception;
32
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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 IDrawable {
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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 VideoOptions : 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 debug logger.trace ("Calling SDL_Init (SDL_INIT_VIDEO | SDL_INIT_JOYSTICK)");
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60 if (SDL_Init (SDL_INIT_VIDEO | SDL_INIT_JOYSTICK /+| SDL_INIT_EVENTTHREAD+/)) {
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61 logger.fatal ("SDL initialisation failed:");
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62 char* msg = SDL_GetError ();
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63 logger.fatal (msg ? fromStringz(msg) : "no reason available");
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64
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65 throw new InitException ("SDL Initialization failed");
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66 }
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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 debug logger.trace ("Calling SDL_Quit ()");
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72 SDL_Quit();
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73 return StageState.INACTIVE;
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74 }
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75 /** Init function to set up a window with OpenGL support. */
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76 StageState initWindow () {
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77 //BEGIN Create window and initialize OpenGL
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78 // Window creation flags and size
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79 flags = SDL_OPENGL;
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80 if (videoOpts.hardware()) flags |= SDL_HWSURFACE | SDL_DOUBLEBUF;
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81 else flags |= SDL_SWSURFACE;
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82 int w, h;
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83 if (videoOpts.fullscreen()) {
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84 flags |= SDL_FULLSCREEN;
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85 w = videoOpts.screenW();
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86 h = videoOpts.screenH();
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87 }
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88 else {
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89 if (videoOpts.resizable()) flags |= SDL_RESIZABLE;
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90 if (videoOpts.noFrame()) flags |= SDL_NOFRAME;
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91 w = videoOpts.windowW();
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92 h = videoOpts.windowH();
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93 }
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94
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95 // OpenGL attributes
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96 SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
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97 SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 6);
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98 SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
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99 SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
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100 SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER,1);
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101
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102 // Open a window
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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 glShadeModel(GL_SMOOTH);
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137
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138 glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
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139
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140 glMatrixMode(GL_MODELVIEW);
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141 glLoadIdentity();
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142
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143 // Used for font rendering:
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144 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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145 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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146 //NOTE: wrap mode may have an effect, but shouldn't be noticed...
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147
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148 // Window-manager settings
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149 SDL_WM_SetCaption (toStringz ("mde"), null);
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150 // SDL_WM_GrabInput (use later)
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151 //END Create window and initialize OpenGL
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152 return StageState.ACTIVE;
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153 }
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154
85
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155
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156 /** Called when a resize event occurs (when the window manager resizes the window). */
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157 void resizeEvent (int w, int h) {
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158 // Save new size to config
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159 if (videoOpts.fullscreen()) { // probably resizeEvent only called when not fullscreen
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160 videoOpts.screenW = w;
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161 videoOpts.screenH = h;
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162 } else {
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163 videoOpts.windowW = w;
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164 videoOpts.windowH = h;
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165 }
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166
85
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167 if (setWindow (w,h))
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168 imde.run = false;
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169 }
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170
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171 /** Add a drawable element to the screen (see IDrawable interface).
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172 *
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173 * Should be called before Init to get the initial size (sizeEvent is only called when the size
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174 * is set). Currently no means to remove drawables, and not really designed for more than one.
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175 */
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176 void addDrawable (IDrawable d) {
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177 drawables ~= d;
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178 }
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179
85
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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 (d; drawables) {
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185 try {
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186 d.draw;
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187 } catch (Exception e) {
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188 logger.error ("Drawable failed to draw: "~e.msg);
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189 }
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190 }
85
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191
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192 debug (drawGlyphCache) FontStyle.drawTexture;
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193
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194 // Error check:
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195 GLenum err = glGetError();
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196 while (err != GL_NO_ERROR) {
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197 logger.error ("GL error: {}", err);
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198 err = glGetError();
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199 }
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200
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201 glFinish(); // Use Finish rather than Flush to make sure gl is ready to swap buffers
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202 SDL_GL_SwapBuffers();
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203 }
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204
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205 /** Set a new window size. Returns true on failure due to the different ways this must be
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206 * handled. */
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207 private bool setWindow (int w, int h) {
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208 foreach (d; drawables) { // Tell all drawables the new window size.
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209 try {
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210 d.sizeEvent (w,h);
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211 } catch (Exception e) {
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212 logger.error ("Drawable failed while setting size: "~e.msg);
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213 }
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214 }
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215
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216 //debug logger.trace ("Setting video mode {}x{}, 32-bit, flags: {}", w,h,flags);
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217 debug logger.trace ("Calling SDL_SetVideoMode ({}, {}, 32, 0x{:x})", w,h, flags);
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218 if (SDL_SetVideoMode (w, h, 32, flags) is null) {
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219 logger.fatal ("Unable to set video mode:");
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220 char* msg = SDL_GetError ();
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221 logger.fatal (msg ? fromStringz(msg) : "no reason available");
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222
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223 // Print a load of info:
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224 logger.info ("Available video modes:");
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225 SDL_Rect** modes = SDL_ListModes (null, SDL_FULLSCREEN);
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226 if (modes is null) logger.info ("None!");
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227 else if (modes is cast(SDL_Rect**) -1) logger.info ("All modes are available");
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228 else {
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229 for (uint i = 0; modes[i] !is null; ++i) {
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230 logger.info ("\t{}x{}", modes[i].w, modes[i].h);
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231 }
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232 }
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233
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234 SDL_VideoInfo* vi = SDL_GetVideoInfo ();
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235 if (vi !is null) {
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236 logger.info ("Video info:");
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237 logger.info ("Hardware surface support: "~ (vi.flags & SDL_HWSURFACE ? "yes" : "no"));
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238 logger.info ("Video memory: {}", vi.video_mem);
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239
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240 if (vi.vfmt !is null) {
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241 logger.info ("Best video mode:");
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242 logger.info ("Bits per pixel: {}", vi.vfmt.BitsPerPixel);
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243 }
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244 }
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245
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246 return true;
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247 }
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248
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249 // Reset the projection and viewport
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250 glMatrixMode (GL_PROJECTION);
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251 glLoadIdentity ();
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252
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253 glViewport (0,0,w,h);
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254
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255 // Make the top-left the origin (see gui/GUI notes.txt):
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256 // Note that this only affects vertex operations − direct rasterisation operations are
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257 // unaffected!
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258 glOrtho (0.0,w, h,0.0, -1.0, 1.0);
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259
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260 glMatrixMode(GL_MODELVIEW);
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261 return false;
32
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262 }
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263
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264 static this() {
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265 logger = Log.getLogger ("mde.setup.Screen");
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266
94
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267 videoOpts = new VideoOptions;
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268 Options.addOptionsClass (videoOpts, "VideoOptions");
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269 }
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270
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271 // DATA:
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272 private:
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273 uint flags = 0;
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274 IDrawable[] drawables;
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275 Logger logger;
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276 VideoOptions videoOpts;
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277 }