Mercurial > fife-parpg

comparison ext/guichan-0.8.2/examples/hge.hpp @ 378:64738befdf3b

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bringing in the changes from the build_system_rework branch in preparation for the 0.3.0 release. This commit will require the Jan2010 devkit. Clients will also need to be modified to the new way to import fife.
author vtchill@33b003aa-7bff-0310-803a-e67f0ece8222
date Mon, 11 Jan 2010 23:34:52 +0000
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377:fe6fb0e0ed23 378:64738befdf3b
1 /*
2 * Code that sets up an HGE application with Guichan using the
3 * Guichan HGE back end.
4 */
5
6 #include <guichan.hpp>
7 #include <guichan/hge.hpp>
8 #include <string>
9
10 namespace hge
11 {
12 HGE *hge = NULL;
13 bool running = false;
14
15 // All back ends contain objects to make Guichan work on a
16 // specific target - in this case HGE - and they are a Graphics
17 // object to make Guichan able to draw itself using HGE, an
18 // input objec to make Guichan able to get user input using HGE
19 // and an ImageLoader object to make Guichan able to load images
20 // using SDL.
21 gcn::HGEGraphics* graphics;
22 gcn::HGEInput* input;
23 gcn::HGEImageLoader* imageLoader;
24
25 /**
26 * The frame function for the HGE application.
27 */
28 bool frameFunc()
29 {
30 if (hge->Input_GetKeyState(HGEK_ESCAPE) || running)
31 {
32 return true;
33 }
34
35 // Now we let the Gui object perform its logic.
36 globals::gui->logic();
37 // Next we begin a scene.
38 hge->Gfx_BeginScene();
39 hge->Gfx_Clear(0);
40 // Now we let the Gui object draw itself.
41 globals::gui->draw();
42 // Finally we end the scene causing the screen to be updated.
43 hge->Gfx_EndScene();
44
45 return false;
46 }
47
48 /**
49 * Initialises the HGE application. This function creates the global
50 * Gui object that can be populated by various examples.
51 */
52 void init()
53 {
54 // We simply initialise HGE as we would do with any HGE application.
55 hge = hgeCreate(HGE_VERSION);
56
57 hge->System_SetState(HGE_FRAMEFUNC, frameFunc);
58 hge->System_SetState(HGE_SCREENWIDTH, 640);
59 hge->System_SetState(HGE_SCREENHEIGHT, 480);
60 hge->System_SetState(HGE_WINDOWED, true);
61 hge->System_SetState(HGE_HIDEMOUSE, false);
62 hge->System_SetState(HGE_USESOUND, false);
63 hge->System_SetState(HGE_SHOWSPLASH, false);
64 hge->System_SetState(HGE_LOGFILE, "hgelog.txt");
65
66 if (!hge->System_Initiate())
67 {
68 throw GCN_EXCEPTION("Unable to initialse HGE: " + std::string(hge->System_GetErrorMessage()));
69 }
70
71 // Now it's time to initialise the Guichan HGE back end.
72
73 imageLoader = new gcn::HGEImageLoader();
74 // The ImageLoader Guichan should use needs to be passed to the Image object
75 // using a static function.
76 gcn::Image::setImageLoader(imageLoader);
77 graphics = new gcn::HGEGraphics();
78 input = new gcn::HGEInput();
79
80 // Now we create the Gui object to be used with this HGE application.
81 globals::gui = new gcn::Gui();
82 // The Gui object needs a Graphics to be able to draw itself and an Input
83 // object to be able to check for user input. In this case we provide the
84 // Gui object with HGE implementations of these objects hence making Guichan
85 // able to utilise HGE.
86 globals::gui->setGraphics(graphics);
87 globals::gui->setInput(input);
88 }
89
90 /**
91 * Halts the HGE application.
92 */
93 void halt()
94 {
95 delete globals::gui;
96
97 delete imageLoader;
98 delete input;
99 delete graphics;
100
101 hge->System_Shutdown();
102 hge->Release();
103 }
104
105 /**
106 * Runs the HGE application.
107 */
108 void run()
109 {
110 hge->System_Start();
111 }
112 }