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annotate ext/guichan-0.8.1/examples/openglallegro.hpp @ 130:b49714fff478

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* Workaround for Segfault_in_cxa_allocate_exception: http://wiki.fifengine.de/Segfault_in_cxa_allocate_exception * Full credit goes to Yonibear from OpenAnno who tracked down the issue
author mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
date Mon, 18 Aug 2008 23:11:32 +0000
parents 4a0efb7baf70
children
rev   line source
0
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1 /*
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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2 * Code that sets up an OpenGL application with Guichan using the
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3 * Guichan OpenGL back end and the Allegro back end (as OpenGL cannot
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4 * load images nor check for user input an additional back end needs
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5 * to be used).
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6 */
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7
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8 // The openglallegroimageloader.hpp header file needs to be included
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9 // in order to get the image loader that uses OpenGL and Allegro.
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10 #include <guichan/opengl/openglallegroimageloader.hpp>
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11 #include <guichan.hpp>
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12 #include <guichan/opengl.hpp>
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13 #include <guichan/allegro.hpp>
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14
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15 namespace openglallegro
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16 {
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17 // All back ends contain objects to make Guichan work on a
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18 // specific target. They are a Graphics object to make Guichan
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19 // able to draw itself using OpenGL, an input objec to make
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20 // Guichan able to get user input using Allegro and an ImageLoader
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21 // object to make Guichan able to load images using OpenGL and Allegro.
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22 gcn::OpenGLGraphics* graphics;
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23 gcn::AllegroInput* input;
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24 gcn::OpenGLAllegroImageLoader* imageLoader;
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25
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26 /**
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27 * Initialises the OpenGL and Allegro application. This function creates the global
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28 * Gui object that can be populated by various examples.
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29 */
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30 void init()
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31 {
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32 // We simply initialise OpenGL and Allegro as we would do with any OpenGL
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33 // and Allegro application.
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34 allegro_init();
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35
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36 install_allegro_gl();
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37
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38 allegro_gl_clear_settings();
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39 allegro_gl_set (AGL_COLOR_DEPTH, 32);
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40 allegro_gl_set (AGL_Z_DEPTH, 24);
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41 allegro_gl_set (AGL_FULLSCREEN, TRUE);
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42 allegro_gl_set (AGL_DOUBLEBUFFER, 1);
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43 allegro_gl_set (AGL_SUGGEST, AGL_COLOR_DEPTH | AGL_Z_DEPTH | AGL_DOUBLEBUFFER);
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44
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45 set_gfx_mode(GFX_OPENGL_WINDOWED, 640, 480, 0, 0);
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46
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47 install_keyboard();
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48 install_mouse();
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49 install_timer();
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50
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51 glViewport(0, 0, 640, 480);
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52 glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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53
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54 // Now it's time to initialise the Guichan OpenGL back end
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55 // and the Guichan Allegro back end.
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56
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57 imageLoader = new gcn::OpenGLAllegroImageLoader();
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58 // The ImageLoader Guichan should use needs to be passed to the Image object
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59 // using a static function.
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60 gcn::Image::setImageLoader(imageLoader);
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61 graphics = new gcn::OpenGLGraphics();
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62 // We need to tell the OpenGL Graphics object how big the screen is.
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63 graphics->setTargetPlane(640, 480);
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64 input = new gcn::AllegroInput();
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65
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66 // Now we create the Gui object to be used with this OpenGL
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67 // and Allegro application.
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68 globals::gui = new gcn::Gui();
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69 // The Gui object needs a Graphics to be able to draw itself and an Input
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70 // object to be able to check for user input. In this case we provide the
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71 // Gui object with OpenGL and Allegro implementations of these objects hence
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72 // making Guichan able to utilise OpenGL and Allegro.
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73 globals::gui->setGraphics(graphics);
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74 globals::gui->setInput(input);
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75 }
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76
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77 /**
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78 * Halts the OpenGL and Allegro application.
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79 */
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80 void halt()
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81 {
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82 delete globals::gui;
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83
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84 delete imageLoader;
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85 delete input;
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86 delete graphics;
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87 }
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88
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89 /**
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90 * Runs the OpenGL and Allegro application.
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91 */
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92 void run()
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93 {
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94 while(!key[KEY_ESC])
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95 {
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96 // Now we let the Gui object perform its logic.
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97 globals::gui->logic();
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98 // Now we let the Gui object draw itself.
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99 globals::gui->draw();
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100
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101 // Now we draw the mouse cursor.
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102 allegro_gl_set_allegro_mode();
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103 show_mouse(screen);
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104 algl_draw_mouse();
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105 allegro_gl_unset_allegro_mode();
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106
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107 // Finally we update the screen.
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
108 allegro_gl_flip();
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
109 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
110 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
111 }