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1 // | |
2 // Book: OpenGL(R) ES 2.0 Programming Guide | |
3 // Authors: Aaftab Munshi, Dan Ginsburg, Dave Shreiner | |
4 // ISBN-10: 0321502795 | |
5 // ISBN-13: 9780321502797 | |
6 // Publisher: Addison-Wesley Professional | |
7 // URLs: http://safari.informit.com/9780321563835 | |
8 // http://www.opengles-book.com | |
9 // | |
10 | |
11 // esUtil_win32.c | |
12 // | |
13 // This file contains the Win32 implementation of the windowing functions. | |
14 | |
15 | |
16 /// | |
17 // Includes | |
18 // | |
19 #define WIN32_LEAN_AND_MEAN | |
20 #include <windows.h> | |
21 #include "esUtil.h" | |
22 | |
23 ////////////////////////////////////////////////////////////////// | |
24 // | |
25 // Private Functions | |
26 // | |
27 // | |
28 | |
29 /// | |
30 // ESWindowProc() | |
31 // | |
32 // Main window procedure | |
33 // | |
34 LRESULT WINAPI ESWindowProc ( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
) | |
35 { | |
36 LRESULT lRet = 1; | |
37 | |
38 switch (uMsg) | |
39 { | |
40 case WM_CREATE: | |
41 break; | |
42 | |
43 case WM_PAINT: | |
44 { | |
45 ESContext *esContext = (ESContext*)(LONG_PTR) GetWindowLongPtr ( hWn
d, GWL_USERDATA ); | |
46 | |
47 if ( esContext && esContext->drawFunc ) | |
48 esContext->drawFunc ( esContext ); | |
49 | |
50 ValidateRect( esContext->hWnd, NULL ); | |
51 } | |
52 break; | |
53 | |
54 case WM_DESTROY: | |
55 PostQuitMessage(0); | |
56 break; | |
57 | |
58 case WM_CHAR: | |
59 { | |
60 POINT point; | |
61 ESContext *esContext = (ESContext*)(LONG_PTR) GetWindowLongPtr ( hWn
d, GWL_USERDATA ); | |
62 | |
63 GetCursorPos( &point ); | |
64 | |
65 if ( esContext && esContext->keyFunc ) | |
66 esContext->keyFunc ( esContext, (unsigned char) wParam, | |
67 (int) point.x, (int) point.y ); | |
68 } | |
69 break; | |
70 | |
71 default: | |
72 lRet = DefWindowProc (hWnd, uMsg, wParam, lParam); | |
73 break; | |
74 } | |
75 | |
76 return lRet; | |
77 } | |
78 | |
79 ////////////////////////////////////////////////////////////////// | |
80 // | |
81 // Public Functions | |
82 // | |
83 // | |
84 | |
85 /// | |
86 // WinCreate() | |
87 // | |
88 // Create Win32 instance and window | |
89 // | |
90 GLboolean WinCreate ( ESContext *esContext, const char *title ) | |
91 { | |
92 WNDCLASS wndclass = {0}; | |
93 DWORD wStyle = 0; | |
94 RECT windowRect; | |
95 HINSTANCE hInstance = GetModuleHandle(NULL); | |
96 | |
97 | |
98 wndclass.style = CS_OWNDC; | |
99 wndclass.lpfnWndProc = (WNDPROC)ESWindowProc; | |
100 wndclass.hInstance = hInstance; | |
101 wndclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); | |
102 wndclass.lpszClassName = "opengles2.0"; | |
103 | |
104 if (!RegisterClass (&wndclass) ) | |
105 return FALSE; | |
106 | |
107 wStyle = WS_VISIBLE | WS_POPUP | WS_BORDER | WS_SYSMENU | WS_CAPTION; | |
108 | |
109 // Adjust the window rectangle so that the client area has | |
110 // the correct number of pixels | |
111 windowRect.left = 0; | |
112 windowRect.top = 0; | |
113 windowRect.right = esContext->width; | |
114 windowRect.bottom = esContext->height; | |
115 | |
116 AdjustWindowRect ( &windowRect, wStyle, FALSE ); | |
117 | |
118 | |
119 | |
120 esContext->hWnd = CreateWindow( | |
121 "opengles2.0", | |
122 title, | |
123 wStyle, | |
124 0, | |
125 0, | |
126 windowRect.right - windowRect.left, | |
127 windowRect.bottom - windowRect.top, | |
128 NULL, | |
129 NULL, | |
130 hInstance, | |
131 NULL); | |
132 | |
133 // Set the ESContext* to the GWL_USERDATA so that it is available to the | |
134 // ESWindowProc | |
135 SetWindowLongPtr ( esContext->hWnd, GWL_USERDATA, (LONG) (LONG_PTR) esContex
t ); | |
136 | |
137 | |
138 if ( esContext->hWnd == NULL ) | |
139 return GL_FALSE; | |
140 | |
141 ShowWindow ( esContext->hWnd, TRUE ); | |
142 | |
143 return GL_TRUE; | |
144 } | |
145 | |
146 /// | |
147 // winLoop() | |
148 // | |
149 // Start main windows loop | |
150 // | |
151 void WinLoop ( ESContext *esContext ) | |
152 { | |
153 MSG msg = { 0 }; | |
154 int done = 0; | |
155 DWORD lastTime = GetTickCount(); | |
156 | |
157 while (!done) | |
158 { | |
159 int gotMsg = (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE) != 0); | |
160 DWORD curTime = GetTickCount(); | |
161 float deltaTime = (float)( curTime - lastTime ) / 1000.0f; | |
162 lastTime = curTime; | |
163 | |
164 if ( gotMsg ) | |
165 { | |
166 if (msg.message==WM_QUIT) | |
167 { | |
168 done=1; | |
169 } | |
170 else | |
171 { | |
172 TranslateMessage(&msg); | |
173 DispatchMessage(&msg); | |
174 } | |
175 } | |
176 else | |
177 SendMessage( esContext->hWnd, WM_PAINT, 0, 0 ); | |
178 | |
179 // Call update function if registered | |
180 if ( esContext->updateFunc != NULL ) | |
181 esContext->updateFunc ( esContext, deltaTime ); | |
182 } | |
183 } | |
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